/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 SequenceOfStatements --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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/float-newlib/double_req_bl_1121a.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 04:47:10,662 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 04:47:10,664 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 04:47:10,688 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 04:47:10,688 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 04:47:10,689 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 04:47:10,690 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 04:47:10,692 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 04:47:10,693 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 04:47:10,694 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 04:47:10,695 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 04:47:10,696 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 04:47:10,696 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 04:47:10,697 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 04:47:10,698 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 04:47:10,699 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 04:47:10,700 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 04:47:10,701 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 04:47:10,703 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 04:47:10,705 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 04:47:10,707 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 04:47:10,708 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 04:47:10,709 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 04:47:10,710 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 04:47:10,712 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 04:47:10,712 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 04:47:10,713 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 04:47:10,714 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 04:47:10,714 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 04:47:10,715 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 04:47:10,715 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 04:47:10,716 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 04:47:10,717 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 04:47:10,718 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 04:47:10,719 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 04:47:10,719 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 04:47:10,719 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 04:47:10,720 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 04:47:10,720 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 04:47:10,721 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 04:47:10,721 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 04:47:10,722 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 [2020-10-14 04:47:10,748 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 04:47:10,748 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 04:47:10,750 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 04:47:10,750 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 04:47:10,751 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 04:47:10,751 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 04:47:10,751 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 04:47:10,751 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 04:47:10,751 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 04:47:10,752 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 04:47:10,752 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 04:47:10,752 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 04:47:10,752 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 04:47:10,752 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 04:47:10,753 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 04:47:10,753 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 04:47:10,754 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 04:47:10,755 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 04:47:10,755 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 04:47:10,755 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 04:47:10,755 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 04:47:10,755 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 04:47:10,756 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 04:47:10,756 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 04:47:10,756 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 04:47:10,757 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 04:47:10,757 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 04:47:10,757 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 04:47:10,757 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 04:47:10,758 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 -> SequenceOfStatements 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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-14 04:47:11,062 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 04:47:11,074 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 04:47:11,077 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 04:47:11,078 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 04:47:11,079 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 04:47:11,079 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/double_req_bl_1121a.c [2020-10-14 04:47:11,137 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3bf938c95/1b7aec6563cf43d08a6203b07750a527/FLAG0b45c3976 [2020-10-14 04:47:11,570 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 04:47:11,571 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-newlib/double_req_bl_1121a.c [2020-10-14 04:47:11,576 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3bf938c95/1b7aec6563cf43d08a6203b07750a527/FLAG0b45c3976 [2020-10-14 04:47:11,908 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3bf938c95/1b7aec6563cf43d08a6203b07750a527 [2020-10-14 04:47:11,916 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 04:47:11,917 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 04:47:11,918 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 04:47:11,918 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 04:47:11,923 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 04:47:11,924 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 04:47:11" (1/1) ... [2020-10-14 04:47:11,927 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72174ff8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 04:47:11, skipping insertion in model container [2020-10-14 04:47:11,927 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 04:47:11" (1/1) ... [2020-10-14 04:47:11,934 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 04:47:11,974 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 04:47:12,273 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 04:47:12,278 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 04:47:12,332 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 04:47:12,361 INFO L208 MainTranslator]: Completed translation [2020-10-14 04:47:12,362 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 04:47:12 WrapperNode [2020-10-14 04:47:12,362 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 04:47:12,363 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 04:47:12,363 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 04:47:12,363 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 04:47:12,374 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 04:47:12" (1/1) ... [2020-10-14 04:47:12,375 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 04:47:12" (1/1) ... [2020-10-14 04:47:12,387 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 04:47:12" (1/1) ... [2020-10-14 04:47:12,388 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 04:47:12" (1/1) ... [2020-10-14 04:47:12,405 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 04:47:12" (1/1) ... [2020-10-14 04:47:12,415 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 04:47:12" (1/1) ... [2020-10-14 04:47:12,418 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 04:47:12" (1/1) ... [2020-10-14 04:47:12,422 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 04:47:12,422 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 04:47:12,423 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 04:47:12,423 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 04:47:12,423 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 04:47:12" (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 [2020-10-14 04:47:12,495 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 04:47:12,496 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 04:47:12,496 INFO L138 BoogieDeclarations]: Found implementation of procedure isnan_double [2020-10-14 04:47:12,496 INFO L138 BoogieDeclarations]: Found implementation of procedure fmod_double [2020-10-14 04:47:12,496 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 04:47:12,496 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 04:47:12,497 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_double [2020-10-14 04:47:12,497 INFO L130 BoogieDeclarations]: Found specification of procedure isnan_double [2020-10-14 04:47:12,497 INFO L130 BoogieDeclarations]: Found specification of procedure fmod_double [2020-10-14 04:47:12,497 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-14 04:47:12,497 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-10-14 04:47:12,497 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-14 04:47:12,498 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-14 04:47:12,498 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-10-14 04:47:12,498 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-14 04:47:12,499 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 04:47:12,499 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 04:47:12,499 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real [2020-10-14 04:47:12,500 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 04:47:13,016 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 04:47:13,016 INFO L295 CfgBuilder]: Removed 14 assume(true) statements. [2020-10-14 04:47:13,020 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 04:47:13 BoogieIcfgContainer [2020-10-14 04:47:13,020 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 04:47:13,022 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 04:47:13,022 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 04:47:13,025 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 04:47:13,025 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 04:47:11" (1/3) ... [2020-10-14 04:47:13,026 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@356d4d82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 04:47:13, skipping insertion in model container [2020-10-14 04:47:13,026 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 04:47:12" (2/3) ... [2020-10-14 04:47:13,027 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@356d4d82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 04:47:13, skipping insertion in model container [2020-10-14 04:47:13,027 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 04:47:13" (3/3) ... [2020-10-14 04:47:13,029 INFO L109 eAbstractionObserver]: Analyzing ICFG double_req_bl_1121a.c [2020-10-14 04:47:13,038 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 04:47:13,045 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 04:47:13,057 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 04:47:13,078 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 04:47:13,078 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 04:47:13,078 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 04:47:13,078 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 04:47:13,079 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 04:47:13,079 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 04:47:13,079 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 04:47:13,079 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 04:47:13,097 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states. [2020-10-14 04:47:13,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-14 04:47:13,103 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 04:47:13,104 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] [2020-10-14 04:47:13,105 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 04:47:13,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 04:47:13,109 INFO L82 PathProgramCache]: Analyzing trace with hash 1778081115, now seen corresponding path program 1 times [2020-10-14 04:47:13,116 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 04:47:13,116 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [127348341] [2020-10-14 04:47:13,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 04:47:13,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:47:13,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:47:13,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:47:13,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:47:13,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-14 04:47:13,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 04:47:13,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 198 [2020-10-14 04:47:13,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:47:13,429 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:47:13,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 04:47:13,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 04:47:13,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 04:47:13,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-14 04:47:13,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 04:47:13,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:47:13,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:47:13,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:47:13,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 04:47:13,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 04:47:13,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-14 04:47:13,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:47:13,518 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:47:13,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 04:47:13,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 04:47:13,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 04:47:13,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-14 04:47:13,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 04:47:13,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:47:13,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:47:13,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:47:13,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:47:13,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-14 04:47:13,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 04:47:13,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-14 04:47:13,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:47:13,578 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:47:13,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 04:47:13,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-10-14 04:47:13,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 04:47:13,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 04:47:13,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-14 04:47:13,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:47:13,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:47:13,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:47:13,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 04:47:13,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 04:47:13,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 04:47:13,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:47:13,592 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:47:13,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 04:47:13,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 04:47:13,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 04:47:13,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 04:47:13,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 04:47:13,602 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [127348341] [2020-10-14 04:47:13,604 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 04:47:13,604 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 04:47:13,605 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732112190] [2020-10-14 04:47:13,610 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 04:47:13,610 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 04:47:13,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 04:47:13,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 04:47:13,627 INFO L87 Difference]: Start difference. First operand 68 states. Second operand 4 states. [2020-10-14 04:47:13,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 04:47:13,906 INFO L93 Difference]: Finished difference Result 128 states and 210 transitions. [2020-10-14 04:47:13,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-14 04:47:13,907 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-10-14 04:47:13,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 04:47:13,920 INFO L225 Difference]: With dead ends: 128 [2020-10-14 04:47:13,920 INFO L226 Difference]: Without dead ends: 64 [2020-10-14 04:47:13,924 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 04:47:13,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-14 04:47:13,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-10-14 04:47:13,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-14 04:47:13,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 90 transitions. [2020-10-14 04:47:13,971 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 90 transitions. Word has length 22 [2020-10-14 04:47:13,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 04:47:13,971 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 90 transitions. [2020-10-14 04:47:13,971 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 04:47:13,971 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 90 transitions. [2020-10-14 04:47:13,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-14 04:47:13,973 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 04:47:13,973 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] [2020-10-14 04:47:13,974 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 04:47:13,974 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 04:47:13,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 04:47:13,974 INFO L82 PathProgramCache]: Analyzing trace with hash -943917416, now seen corresponding path program 1 times [2020-10-14 04:47:13,975 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 04:47:13,975 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1206535402] [2020-10-14 04:47:13,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 04:47:14,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-14 04:47:14,019 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-14 04:47:14,019 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-10-14 04:47:14,024 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 04:47:14,042 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.10 04:47:14 BoogieIcfgContainer [2020-10-14 04:47:14,042 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-14 04:47:14,045 INFO L168 Benchmark]: Toolchain (without parser) took 2126.87 ms. Allocated memory was 147.8 MB in the beginning and 231.7 MB in the end (delta: 83.9 MB). Free memory was 103.9 MB in the beginning and 171.9 MB in the end (delta: -68.1 MB). Peak memory consumption was 15.8 MB. Max. memory is 7.1 GB. [2020-10-14 04:47:14,046 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 147.8 MB. Free memory was 122.4 MB in the beginning and 122.0 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. [2020-10-14 04:47:14,047 INFO L168 Benchmark]: CACSL2BoogieTranslator took 444.54 ms. Allocated memory was 147.8 MB in the beginning and 204.5 MB in the end (delta: 56.6 MB). Free memory was 103.4 MB in the beginning and 179.1 MB in the end (delta: -75.7 MB). Peak memory consumption was 19.8 MB. Max. memory is 7.1 GB. [2020-10-14 04:47:14,048 INFO L168 Benchmark]: Boogie Preprocessor took 59.15 ms. Allocated memory is still 204.5 MB. Free memory was 179.1 MB in the beginning and 176.3 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 7.1 GB. [2020-10-14 04:47:14,049 INFO L168 Benchmark]: RCFGBuilder took 598.06 ms. Allocated memory is still 204.5 MB. Free memory was 176.3 MB in the beginning and 142.6 MB in the end (delta: 33.7 MB). Peak memory consumption was 33.7 MB. Max. memory is 7.1 GB. [2020-10-14 04:47:14,050 INFO L168 Benchmark]: TraceAbstraction took 1020.55 ms. Allocated memory was 204.5 MB in the beginning and 231.7 MB in the end (delta: 27.3 MB). Free memory was 142.6 MB in the beginning and 171.9 MB in the end (delta: -29.3 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-10-14 04:47:14,054 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 147.8 MB. Free memory was 122.4 MB in the beginning and 122.0 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 444.54 ms. Allocated memory was 147.8 MB in the beginning and 204.5 MB in the end (delta: 56.6 MB). Free memory was 103.4 MB in the beginning and 179.1 MB in the end (delta: -75.7 MB). Peak memory consumption was 19.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 59.15 ms. Allocated memory is still 204.5 MB. Free memory was 179.1 MB in the beginning and 176.3 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 598.06 ms. Allocated memory is still 204.5 MB. Free memory was 176.3 MB in the beginning and 142.6 MB in the end (delta: 33.7 MB). Peak memory consumption was 33.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1020.55 ms. Allocated memory was 204.5 MB in the beginning and 231.7 MB in the end (delta: 27.3 MB). Free memory was 142.6 MB in the beginning and 171.9 MB in the end (delta: -29.3 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 175]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of bitwiseOr at line 44, overapproximation of someUnaryDOUBLEoperation at line 20, overapproximation of bitwiseAnd at line 39, overapproximation of someBinaryArithmeticDOUBLEoperation at line 45, overapproximation of someBinaryDOUBLEComparisonOperation at line 16, overapproximation of bitwiseXor at line 40. Possible FailurePath: [L18-L21] static const double one_fmod = 1.0, Zero_fmod[] = { 0.0, -0.0, }; [L169] double x = __VERIFIER_nondet_double(); [L170] double y = 0.0; [L171] CALL, EXPR fmod_double(x, y) [L24] __int32_t n, hx, hy, hz, ix, iy, sx, i; [L25] __uint32_t lx, ly, lz; [L28] ieee_double_shape_type ew_u; [L29] ew_u.value = (x) [L30] EXPR ew_u.parts.msw [L30] (hx) = ew_u.parts.msw [L31] EXPR ew_u.parts.lsw [L31] (lx) = ew_u.parts.lsw [L34] ieee_double_shape_type ew_u; [L35] ew_u.value = (y) [L36] EXPR ew_u.parts.msw [L36] (hy) = ew_u.parts.msw [L37] EXPR ew_u.parts.lsw [L37] (ly) = ew_u.parts.lsw [L39] sx = hx & 0x80000000 [L40] hx ^= sx [L41] hy &= 0x7fffffff [L43-L44] COND TRUE (hy | ly) == 0 || (hx >= 0x7ff00000) || ((hy | ((ly | -ly) >> 31)) > 0x7ff00000) [L45] return (x * y) / (x * y); [L171] RET, EXPR fmod_double(x, y) [L171] double res = fmod_double(x, y); [L174] CALL, EXPR isnan_double(res) [L16] return x != x; [L174] RET, EXPR isnan_double(res) [L174] COND TRUE !isnan_double(res) [L175] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 68 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.9s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 92 SDtfs, 8 SDslu, 79 SDs, 0 SdLazy, 95 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=68occurred in iteration=0, 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, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 46 NumberOfCodeBlocks, 46 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 21 ConstructedInterpolants, 0 QuantifiedInterpolants, 1134 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 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 could not prove your program: unable to determine feasibility of some traces Received shutdown request...