/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --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_0661a.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 23:16:54,341 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 23:16:54,343 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 23:16:54,367 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 23:16:54,368 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 23:16:54,369 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 23:16:54,370 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 23:16:54,372 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 23:16:54,373 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 23:16:54,374 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 23:16:54,375 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 23:16:54,376 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 23:16:54,377 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 23:16:54,378 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 23:16:54,379 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 23:16:54,380 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 23:16:54,381 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 23:16:54,381 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 23:16:54,383 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 23:16:54,385 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 23:16:54,386 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 23:16:54,387 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 23:16:54,388 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 23:16:54,389 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 23:16:54,392 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 23:16:54,392 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 23:16:54,392 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 23:16:54,393 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 23:16:54,393 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 23:16:54,394 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 23:16:54,395 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 23:16:54,395 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 23:16:54,396 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 23:16:54,397 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 23:16:54,398 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 23:16:54,398 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 23:16:54,399 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 23:16:54,399 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 23:16:54,399 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 23:16:54,400 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 23:16:54,401 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 23:16:54,401 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 23:16:54,425 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 23:16:54,425 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 23:16:54,426 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 23:16:54,426 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 23:16:54,426 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 23:16:54,427 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 23:16:54,427 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 23:16:54,427 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 23:16:54,427 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 23:16:54,427 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 23:16:54,428 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 23:16:54,428 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 23:16:54,428 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 23:16:54,428 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 23:16:54,428 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 23:16:54,429 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 23:16:54,429 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 23:16:54,429 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 23:16:54,429 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 23:16:54,429 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 23:16:54,430 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 23:16:54,430 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 23:16:54,430 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 23:16:54,430 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 23:16:54,430 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 23:16:54,431 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 23:16:54,431 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 23:16:54,431 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 23:16:54,431 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 23:16:54,431 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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; [2020-10-14 23:16:54,755 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 23:16:54,777 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 23:16:54,781 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 23:16:54,784 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 23:16:54,784 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 23:16:54,785 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/double_req_bl_0661a.c [2020-10-14 23:16:54,859 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c204d0dd9/e42d9f629c0447c2983006d021bed768/FLAG4db91295d [2020-10-14 23:16:55,355 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 23:16:55,356 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-newlib/double_req_bl_0661a.c [2020-10-14 23:16:55,364 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c204d0dd9/e42d9f629c0447c2983006d021bed768/FLAG4db91295d [2020-10-14 23:16:55,710 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c204d0dd9/e42d9f629c0447c2983006d021bed768 [2020-10-14 23:16:55,719 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 23:16:55,721 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 23:16:55,722 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 23:16:55,722 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 23:16:55,725 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 23:16:55,726 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:16:55" (1/1) ... [2020-10-14 23:16:55,729 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f78b0b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:55, skipping insertion in model container [2020-10-14 23:16:55,730 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:16:55" (1/1) ... [2020-10-14 23:16:55,738 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 23:16:55,789 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 23:16:56,200 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 23:16:56,217 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 23:16:56,345 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 23:16:56,382 INFO L208 MainTranslator]: Completed translation [2020-10-14 23:16:56,383 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:56 WrapperNode [2020-10-14 23:16:56,384 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 23:16:56,385 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 23:16:56,385 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 23:16:56,385 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 23:16:56,400 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:56" (1/1) ... [2020-10-14 23:16:56,402 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:56" (1/1) ... [2020-10-14 23:16:56,437 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:56" (1/1) ... [2020-10-14 23:16:56,437 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:56" (1/1) ... [2020-10-14 23:16:56,490 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:56" (1/1) ... [2020-10-14 23:16:56,501 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:56" (1/1) ... [2020-10-14 23:16:56,504 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:56" (1/1) ... [2020-10-14 23:16:56,508 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 23:16:56,509 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 23:16:56,509 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 23:16:56,509 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 23:16:56,510 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:56" (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 23:16:56,575 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 23:16:56,575 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 23:16:56,575 INFO L138 BoogieDeclarations]: Found implementation of procedure fabs_double [2020-10-14 23:16:56,575 INFO L138 BoogieDeclarations]: Found implementation of procedure atan_double [2020-10-14 23:16:56,576 INFO L138 BoogieDeclarations]: Found implementation of procedure __ieee754_atan2 [2020-10-14 23:16:56,576 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_double [2020-10-14 23:16:56,576 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 23:16:56,576 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 23:16:56,576 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_double [2020-10-14 23:16:56,576 INFO L130 BoogieDeclarations]: Found specification of procedure fabs_double [2020-10-14 23:16:56,577 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-14 23:16:56,577 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-10-14 23:16:56,577 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-14 23:16:56,577 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-14 23:16:56,577 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-14 23:16:56,577 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-10-14 23:16:56,578 INFO L130 BoogieDeclarations]: Found specification of procedure atan_double [2020-10-14 23:16:56,578 INFO L130 BoogieDeclarations]: Found specification of procedure __ieee754_atan2 [2020-10-14 23:16:56,578 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_double [2020-10-14 23:16:56,578 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 23:16:56,578 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 23:16:56,578 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real [2020-10-14 23:16:56,578 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 23:16:57,307 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 23:16:57,308 INFO L295 CfgBuilder]: Removed 18 assume(true) statements. [2020-10-14 23:16:57,313 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:16:57 BoogieIcfgContainer [2020-10-14 23:16:57,313 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 23:16:57,315 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 23:16:57,315 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 23:16:57,318 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 23:16:57,319 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:16:55" (1/3) ... [2020-10-14 23:16:57,320 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@579339d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:16:57, skipping insertion in model container [2020-10-14 23:16:57,320 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:56" (2/3) ... [2020-10-14 23:16:57,320 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@579339d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:16:57, skipping insertion in model container [2020-10-14 23:16:57,320 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:16:57" (3/3) ... [2020-10-14 23:16:57,322 INFO L109 eAbstractionObserver]: Analyzing ICFG double_req_bl_0661a.c [2020-10-14 23:16:57,333 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 23:16:57,341 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 23:16:57,356 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 23:16:57,378 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 23:16:57,378 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 23:16:57,378 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 23:16:57,378 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 23:16:57,378 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 23:16:57,379 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 23:16:57,379 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 23:16:57,379 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 23:16:57,400 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states. [2020-10-14 23:16:57,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-14 23:16:57,407 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:16:57,409 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] [2020-10-14 23:16:57,409 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:16:57,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:16:57,415 INFO L82 PathProgramCache]: Analyzing trace with hash 913677384, now seen corresponding path program 1 times [2020-10-14 23:16:57,424 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:16:57,425 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1706990479] [2020-10-14 23:16:57,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:16:57,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:16:57,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:16:57,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:16:57,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:16:57,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-14 23:16:57,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:16:57,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 288 [2020-10-14 23:16:57,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:16:57,860 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:16:57,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:16:57,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-14 23:16:57,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:16:57,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-14 23:16:57,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:16:57,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:16:57,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:16:58,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:16:58,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:16:58,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:16:58,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-14 23:16:58,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:16:58,014 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:16:58,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:16:58,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:16:58,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:16:58,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:16:58,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 23:16:58,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:16:58,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:16:58,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:16:58,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:16:58,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-14 23:16:58,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:16:58,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-14 23:16:58,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:16:58,060 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:16:58,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:16:58,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 23:16:58,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:16:58,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:16:58,067 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 23:16:58,068 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1706990479] [2020-10-14 23:16:58,070 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 23:16:58,071 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 23:16:58,072 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624526785] [2020-10-14 23:16:58,077 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 23:16:58,078 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:16:58,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 23:16:58,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 23:16:58,095 INFO L87 Difference]: Start difference. First operand 112 states. Second operand 4 states. [2020-10-14 23:16:58,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:16:58,530 INFO L93 Difference]: Finished difference Result 218 states and 342 transitions. [2020-10-14 23:16:58,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-14 23:16:58,532 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-10-14 23:16:58,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:16:58,545 INFO L225 Difference]: With dead ends: 218 [2020-10-14 23:16:58,545 INFO L226 Difference]: Without dead ends: 107 [2020-10-14 23:16:58,551 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 23:16:58,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-14 23:16:58,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2020-10-14 23:16:58,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-14 23:16:58,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 147 transitions. [2020-10-14 23:16:58,618 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 147 transitions. Word has length 20 [2020-10-14 23:16:58,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:16:58,619 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 147 transitions. [2020-10-14 23:16:58,619 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 23:16:58,619 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 147 transitions. [2020-10-14 23:16:58,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-14 23:16:58,621 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:16:58,621 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 23:16:58,622 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 23:16:58,622 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:16:58,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:16:58,622 INFO L82 PathProgramCache]: Analyzing trace with hash -1713483969, now seen corresponding path program 1 times [2020-10-14 23:16:58,623 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:16:58,623 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1823854062] [2020-10-14 23:16:58,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:16:58,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-14 23:16:58,675 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-14 23:16:58,675 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-10-14 23:16:58,680 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 23:16:58,704 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.10 11:16:58 BoogieIcfgContainer [2020-10-14 23:16:58,704 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-14 23:16:58,707 INFO L168 Benchmark]: Toolchain (without parser) took 2985.33 ms. Allocated memory was 147.3 MB in the beginning and 236.5 MB in the end (delta: 89.1 MB). Free memory was 103.0 MB in the beginning and 120.5 MB in the end (delta: -17.4 MB). Peak memory consumption was 71.7 MB. Max. memory is 7.1 GB. [2020-10-14 23:16:58,708 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 147.3 MB. Free memory was 121.9 MB in the beginning and 121.5 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. [2020-10-14 23:16:58,709 INFO L168 Benchmark]: CACSL2BoogieTranslator took 662.49 ms. Allocated memory was 147.3 MB in the beginning and 203.9 MB in the end (delta: 56.6 MB). Free memory was 102.6 MB in the beginning and 175.5 MB in the end (delta: -72.9 MB). Peak memory consumption was 18.6 MB. Max. memory is 7.1 GB. [2020-10-14 23:16:58,710 INFO L168 Benchmark]: Boogie Preprocessor took 124.08 ms. Allocated memory is still 203.9 MB. Free memory was 175.5 MB in the beginning and 172.7 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 7.1 GB. [2020-10-14 23:16:58,711 INFO L168 Benchmark]: RCFGBuilder took 804.58 ms. Allocated memory is still 203.9 MB. Free memory was 172.7 MB in the beginning and 126.6 MB in the end (delta: 46.1 MB). Peak memory consumption was 46.1 MB. Max. memory is 7.1 GB. [2020-10-14 23:16:58,712 INFO L168 Benchmark]: TraceAbstraction took 1389.40 ms. Allocated memory was 203.9 MB in the beginning and 236.5 MB in the end (delta: 32.5 MB). Free memory was 126.6 MB in the beginning and 120.5 MB in the end (delta: 6.1 MB). Peak memory consumption was 38.6 MB. Max. memory is 7.1 GB. [2020-10-14 23:16:58,716 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 147.3 MB. Free memory was 121.9 MB in the beginning and 121.5 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 662.49 ms. Allocated memory was 147.3 MB in the beginning and 203.9 MB in the end (delta: 56.6 MB). Free memory was 102.6 MB in the beginning and 175.5 MB in the end (delta: -72.9 MB). Peak memory consumption was 18.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 124.08 ms. Allocated memory is still 203.9 MB. Free memory was 175.5 MB in the beginning and 172.7 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 804.58 ms. Allocated memory is still 203.9 MB. Free memory was 172.7 MB in the beginning and 126.6 MB in the end (delta: 46.1 MB). Peak memory consumption was 46.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1389.40 ms. Allocated memory was 203.9 MB in the beginning and 236.5 MB in the end (delta: 32.5 MB). Free memory was 126.6 MB in the beginning and 120.5 MB in the end (delta: 6.1 MB). Peak memory consumption was 38.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 271]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of bitwiseOr at line 162, overapproximation of someUnaryDOUBLEoperation at line 265, overapproximation of bitwiseAnd at line 160, overapproximation of someBinaryArithmeticDOUBLEoperation at line 163, overapproximation of someBinaryDOUBLEComparisonOperation at line 270. Possible FailurePath: [L37-L42] static const double atanhi_atan[] = { 4.63647609000806093515e-01, 7.85398163397448278999e-01, 9.82793723247329054082e-01, 1.57079632679489655800e+00, }; [L44-L49] static const double atanlo_atan[] = { 2.26987774529616870924e-17, 3.06161699786838301793e-17, 1.39033110312309984516e-17, 6.12323399573676603587e-17, }; [L51-L58] static const double aT_atan[] = { 3.33333333333329318027e-01, -1.99999999998764832476e-01, 1.42857142725034663711e-01, -1.11111104054623557880e-01, 9.09088713343650656196e-02, -7.69187620504482999495e-02, 6.66107313738753120669e-02, -5.83357013379057348645e-02, 4.97687799461593236017e-02, -3.65315727442169155270e-02, 1.62858201153657823623e-02, }; [L60-L62] static const double one_atan = 1.0, pi_o_4 = 7.8539816339744827900E-01, pi_o_2 = 1.5707963267948965580E+00, pi = 3.1415926535897931160E+00, huge_atan = 1.0e300; [L139-L140] static const double tiny_atan2 = 1.0e-300, zero_atan2 = 0.0, pi_lo_atan2 = 1.2246467991473531772E-16; [L264] double x = __VERIFIER_nondet_double(); [L265] double y = -0.0; [L267] COND TRUE x > 0.0 [L268] CALL, EXPR __ieee754_atan2(y, x) [L143] double z; [L144] __int32_t k, m, hx, hy, ix, iy; [L145] __uint32_t lx, ly; [L148] ieee_double_shape_type ew_u; [L149] ew_u.value = (x) [L150] EXPR ew_u.parts.msw [L150] (hx) = ew_u.parts.msw [L151] EXPR ew_u.parts.lsw [L151] (lx) = ew_u.parts.lsw [L153] ix = hx & 0x7fffffff [L155] ieee_double_shape_type ew_u; [L156] ew_u.value = (y) [L157] EXPR ew_u.parts.msw [L157] (hy) = ew_u.parts.msw [L158] EXPR ew_u.parts.lsw [L158] (ly) = ew_u.parts.lsw [L160] iy = hy & 0x7fffffff [L161-L162] COND TRUE ((ix | ((lx | -lx) >> 31)) > 0x7ff00000) || ((iy | ((ly | -ly) >> 31)) > 0x7ff00000) [L163] return x + y; [L268] RET, EXPR __ieee754_atan2(y, x) [L268] double res = __ieee754_atan2(y, x); [L270] EXPR res == -0.0 && __signbit_double(res) == 1 [L270] COND TRUE !(res == -0.0 && __signbit_double(res) == 1) [L271] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 112 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.3s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 148 SDtfs, 18 SDslu, 133 SDs, 0 SdLazy, 148 SolverSat, 14 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=112occurred 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, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 42 NumberOfCodeBlocks, 42 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 19 ConstructedInterpolants, 0 QuantifiedInterpolants, 1615 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...