/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.8 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/float-newlib/float_req_bl_1072d.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-19 01:55:03,656 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-19 01:55:03,659 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-19 01:55:03,702 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-19 01:55:03,703 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-19 01:55:03,712 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-19 01:55:03,714 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-19 01:55:03,718 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-19 01:55:03,721 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-19 01:55:03,724 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-19 01:55:03,725 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-19 01:55:03,726 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-19 01:55:03,726 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 01:55:03,729 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 01:55:03,731 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 01:55:03,733 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 01:55:03,735 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 01:55:03,735 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 01:55:03,737 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 01:55:03,746 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 01:55:03,749 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 01:55:03,750 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 01:55:03,751 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 01:55:03,751 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 01:55:03,763 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-19 01:55:03,769 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-19 01:55:03,769 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-19 01:55:03,770 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-19 01:55:03,770 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-19 01:55:03,775 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-19 01:55:03,775 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-19 01:55:03,776 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-19 01:55:03,776 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-19 01:55:03,779 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-19 01:55:03,780 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-19 01:55:03,781 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-19 01:55:03,781 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-19 01:55:03,781 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-19 01:55:03,782 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 01:55:03,783 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 01:55:03,784 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 01:55:03,785 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-19 01:55:03,825 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 01:55:03,825 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 01:55:03,826 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 01:55:03,827 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 01:55:03,827 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 01:55:03,827 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 01:55:03,827 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 01:55:03,827 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 01:55:03,828 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 01:55:03,828 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 01:55:03,828 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 01:55:03,828 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 01:55:03,828 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 01:55:03,828 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 01:55:03,829 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 01:55:03,829 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 01:55:03,829 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 01:55:03,829 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 01:55:03,829 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 01:55:03,830 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 01:55:03,830 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 01:55:03,830 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 01:55:03,830 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 01:55:03,830 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 01:55:03,831 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 01:55:03,831 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 01:55:03,831 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 01:55:03,831 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 01:55:03,831 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 01:55:03,832 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8; [2020-08-19 01:55:04,133 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 01:55:04,144 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 01:55:04,149 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 01:55:04,151 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 01:55:04,152 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 01:55:04,153 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1072d.c [2020-08-19 01:55:04,231 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dfe524ec1/fb6896c7bff5484e81dd689c34cfae84/FLAGca4d750d2 [2020-08-19 01:55:04,704 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 01:55:04,704 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-newlib/float_req_bl_1072d.c [2020-08-19 01:55:04,710 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dfe524ec1/fb6896c7bff5484e81dd689c34cfae84/FLAGca4d750d2 [2020-08-19 01:55:05,088 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dfe524ec1/fb6896c7bff5484e81dd689c34cfae84 [2020-08-19 01:55:05,099 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 01:55:05,101 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 01:55:05,102 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 01:55:05,103 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 01:55:05,106 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 01:55:05,108 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 01:55:05" (1/1) ... [2020-08-19 01:55:05,111 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3250662d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:55:05, skipping insertion in model container [2020-08-19 01:55:05,111 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 01:55:05" (1/1) ... [2020-08-19 01:55:05,119 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 01:55:05,141 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 01:55:05,338 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 01:55:05,342 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 01:55:05,369 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 01:55:05,391 INFO L208 MainTranslator]: Completed translation [2020-08-19 01:55:05,392 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:55:05 WrapperNode [2020-08-19 01:55:05,392 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 01:55:05,393 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 01:55:05,393 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 01:55:05,393 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 01:55:05,479 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:55:05" (1/1) ... [2020-08-19 01:55:05,479 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:55:05" (1/1) ... [2020-08-19 01:55:05,489 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:55:05" (1/1) ... [2020-08-19 01:55:05,490 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:55:05" (1/1) ... [2020-08-19 01:55:05,501 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:55:05" (1/1) ... [2020-08-19 01:55:05,506 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:55:05" (1/1) ... [2020-08-19 01:55:05,508 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:55:05" (1/1) ... [2020-08-19 01:55:05,511 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 01:55:05,512 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 01:55:05,512 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 01:55:05,512 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 01:55:05,514 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:55:05" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 01:55:05,581 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 01:55:05,581 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 01:55:05,581 INFO L138 BoogieDeclarations]: Found implementation of procedure trunc_float [2020-08-19 01:55:05,581 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_float [2020-08-19 01:55:05,582 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 01:55:05,582 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 01:55:05,582 INFO L130 BoogieDeclarations]: Found specification of procedure trunc_float [2020-08-19 01:55:05,582 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-19 01:55:05,582 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-08-19 01:55:05,582 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-19 01:55:05,583 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-19 01:55:05,583 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-19 01:55:05,583 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-08-19 01:55:05,583 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_float [2020-08-19 01:55:05,583 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 01:55:05,583 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 01:55:05,584 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 01:55:05,939 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 01:55:05,940 INFO L295 CfgBuilder]: Removed 8 assume(true) statements. [2020-08-19 01:55:05,943 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 01:55:05 BoogieIcfgContainer [2020-08-19 01:55:05,944 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 01:55:05,945 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 01:55:05,945 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 01:55:05,948 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 01:55:05,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 01:55:05" (1/3) ... [2020-08-19 01:55:05,949 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5603234c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 01:55:05, skipping insertion in model container [2020-08-19 01:55:05,950 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:55:05" (2/3) ... [2020-08-19 01:55:05,950 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5603234c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 01:55:05, skipping insertion in model container [2020-08-19 01:55:05,950 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 01:55:05" (3/3) ... [2020-08-19 01:55:05,952 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_1072d.c [2020-08-19 01:55:05,963 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 01:55:05,970 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 01:55:05,984 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 01:55:06,010 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 01:55:06,010 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 01:55:06,011 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 01:55:06,011 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 01:55:06,011 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 01:55:06,011 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 01:55:06,011 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 01:55:06,011 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 01:55:06,030 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-08-19 01:55:06,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-19 01:55:06,036 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:55:06,037 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:55:06,037 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:55:06,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:55:06,043 INFO L82 PathProgramCache]: Analyzing trace with hash 753691903, now seen corresponding path program 1 times [2020-08-19 01:55:06,051 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:55:06,051 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1253014922] [2020-08-19 01:55:06,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:55:06,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:55:06,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:55:06,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:55:06,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 01:55:06,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:55:06,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:55:06,271 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1253014922] [2020-08-19 01:55:06,274 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:55:06,274 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-19 01:55:06,275 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659920879] [2020-08-19 01:55:06,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-19 01:55:06,281 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:55:06,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-19 01:55:06,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-19 01:55:06,298 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 4 states. [2020-08-19 01:55:06,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:55:06,495 INFO L93 Difference]: Finished difference Result 68 states and 93 transitions. [2020-08-19 01:55:06,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-19 01:55:06,498 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-08-19 01:55:06,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:55:06,507 INFO L225 Difference]: With dead ends: 68 [2020-08-19 01:55:06,508 INFO L226 Difference]: Without dead ends: 34 [2020-08-19 01:55:06,512 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-19 01:55:06,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-08-19 01:55:06,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-08-19 01:55:06,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-08-19 01:55:06,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2020-08-19 01:55:06,559 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 18 [2020-08-19 01:55:06,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:55:06,559 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2020-08-19 01:55:06,560 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-19 01:55:06,560 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2020-08-19 01:55:06,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-19 01:55:06,561 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:55:06,561 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:55:06,562 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 01:55:06,562 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:55:06,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:55:06,563 INFO L82 PathProgramCache]: Analyzing trace with hash -1111015325, now seen corresponding path program 1 times [2020-08-19 01:55:06,563 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:55:06,563 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [609344229] [2020-08-19 01:55:06,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:55:06,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-19 01:55:06,640 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-19 01:55:06,640 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-19 01:55:06,645 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 01:55:06,660 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.08 01:55:06 BoogieIcfgContainer [2020-08-19 01:55:06,660 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-19 01:55:06,663 INFO L168 Benchmark]: Toolchain (without parser) took 1561.61 ms. Allocated memory was 141.0 MB in the beginning and 203.4 MB in the end (delta: 62.4 MB). Free memory was 103.0 MB in the beginning and 119.3 MB in the end (delta: -16.3 MB). Peak memory consumption was 46.1 MB. Max. memory is 7.1 GB. [2020-08-19 01:55:06,664 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 141.0 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-19 01:55:06,665 INFO L168 Benchmark]: CACSL2BoogieTranslator took 290.01 ms. Allocated memory is still 141.0 MB. Free memory was 102.8 MB in the beginning and 91.8 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. [2020-08-19 01:55:06,667 INFO L168 Benchmark]: Boogie Preprocessor took 118.77 ms. Allocated memory was 141.0 MB in the beginning and 203.4 MB in the end (delta: 62.4 MB). Free memory was 91.8 MB in the beginning and 180.8 MB in the end (delta: -89.0 MB). Peak memory consumption was 12.3 MB. Max. memory is 7.1 GB. [2020-08-19 01:55:06,667 INFO L168 Benchmark]: RCFGBuilder took 432.22 ms. Allocated memory is still 203.4 MB. Free memory was 180.2 MB in the beginning and 160.5 MB in the end (delta: 19.6 MB). Peak memory consumption was 19.6 MB. Max. memory is 7.1 GB. [2020-08-19 01:55:06,668 INFO L168 Benchmark]: TraceAbstraction took 715.46 ms. Allocated memory is still 203.4 MB. Free memory was 159.9 MB in the beginning and 119.3 MB in the end (delta: 40.6 MB). Peak memory consumption was 40.6 MB. Max. memory is 7.1 GB. [2020-08-19 01:55:06,673 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 141.0 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 290.01 ms. Allocated memory is still 141.0 MB. Free memory was 102.8 MB in the beginning and 91.8 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 118.77 ms. Allocated memory was 141.0 MB in the beginning and 203.4 MB in the end (delta: 62.4 MB). Free memory was 91.8 MB in the beginning and 180.8 MB in the end (delta: -89.0 MB). Peak memory consumption was 12.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 432.22 ms. Allocated memory is still 203.4 MB. Free memory was 180.2 MB in the beginning and 160.5 MB in the end (delta: 19.6 MB). Peak memory consumption was 19.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 715.46 ms. Allocated memory is still 203.4 MB. Free memory was 159.9 MB in the beginning and 119.3 MB in the end (delta: 40.6 MB). Peak memory consumption was 40.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 67]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 66, overapproximation of bitwiseAnd at line 19, overapproximation of someUnaryFLOAToperation at line 62, overapproximation of someBinaryArithmeticFLOAToperation at line 38. Possible FailurePath: [L62] float x = -0.0f; [L63] CALL, EXPR trunc_float(x) [L13] __int32_t signbit, w, exponent_less_127; [L15] ieee_float_shape_type gf_u; [L16] gf_u.value = (x) [L17] EXPR gf_u.word [L17] (w) = gf_u.word [L19] signbit = w & 0x80000000 [L20] exponent_less_127 = ((w & 0x7f800000) >> 23) - 127 [L21] COND FALSE !(exponent_less_127 < 23) [L37] COND TRUE exponent_less_127 == 255 [L38] return x + x; [L63] RET, EXPR trunc_float(x) [L63] float res = trunc_float(x); [L66] EXPR res == -0.0f && __signbit_float(res) == 1 [L66] COND TRUE !(res == -0.0f && __signbit_float(res) == 1) [L67] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 38 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.6s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 34 SDtfs, 29 SDslu, 5 SDs, 0 SdLazy, 41 SolverSat, 12 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=38occurred 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, 0.1s InterpolantComputationTime, 37 NumberOfCodeBlocks, 37 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 17 ConstructedInterpolants, 0 QuantifiedInterpolants, 646 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...