/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=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true -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 0.1.25-177f698 [2020-08-22 04:36:54,876 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 04:36:54,879 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 04:36:54,919 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 04:36:54,921 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 04:36:54,932 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 04:36:54,933 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 04:36:54,936 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 04:36:54,939 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 04:36:54,940 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 04:36:54,941 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 04:36:54,943 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 04:36:54,944 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 04:36:54,948 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 04:36:54,951 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 04:36:54,953 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 04:36:54,954 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 04:36:54,956 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 04:36:54,958 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 04:36:54,965 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 04:36:54,967 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 04:36:54,969 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 04:36:54,970 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 04:36:54,970 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 04:36:54,976 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-22 04:36:54,977 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-22 04:36:54,977 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-22 04:36:54,979 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-22 04:36:54,980 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-22 04:36:54,982 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-22 04:36:54,982 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-22 04:36:54,983 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-22 04:36:54,983 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-22 04:36:54,984 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-22 04:36:54,985 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-22 04:36:54,986 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-22 04:36:54,986 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-22 04:36:54,987 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-22 04:36:54,987 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 04:36:54,988 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 04:36:54,989 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 04:36:54,990 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 [2020-08-22 04:36:55,029 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 04:36:55,029 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 04:36:55,031 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 04:36:55,032 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 04:36:55,032 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 04:36:55,032 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 04:36:55,033 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 04:36:55,033 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 04:36:55,033 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 04:36:55,033 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 04:36:55,034 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 04:36:55,034 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 04:36:55,035 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 04:36:55,035 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 04:36:55,035 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 04:36:55,035 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 04:36:55,036 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 04:36:55,036 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 04:36:55,036 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 04:36:55,036 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 04:36:55,036 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 04:36:55,037 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 04:36:55,037 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 04:36:55,037 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 04:36:55,037 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 04:36:55,037 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 04:36:55,038 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 04:36:55,038 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 04:36:55,038 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 04:36:55,038 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=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true; [2020-08-22 04:36:55,325 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 04:36:55,336 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 04:36:55,341 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 04:36:55,342 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 04:36:55,342 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 04:36:55,343 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1072d.c [2020-08-22 04:36:55,395 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4749f5010/cd01e82a09294d3ab51b99f060620093/FLAGce678f432 [2020-08-22 04:36:55,834 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 04:36:55,835 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-newlib/float_req_bl_1072d.c [2020-08-22 04:36:55,842 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4749f5010/cd01e82a09294d3ab51b99f060620093/FLAGce678f432 [2020-08-22 04:36:56,193 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4749f5010/cd01e82a09294d3ab51b99f060620093 [2020-08-22 04:36:56,205 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 04:36:56,207 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 04:36:56,211 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 04:36:56,211 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 04:36:56,215 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 04:36:56,216 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:36:56" (1/1) ... [2020-08-22 04:36:56,219 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@87c88d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:36:56, skipping insertion in model container [2020-08-22 04:36:56,219 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:36:56" (1/1) ... [2020-08-22 04:36:56,228 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 04:36:56,252 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 04:36:56,451 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 04:36:56,455 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 04:36:56,485 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 04:36:56,514 INFO L208 MainTranslator]: Completed translation [2020-08-22 04:36:56,515 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:36:56 WrapperNode [2020-08-22 04:36:56,515 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 04:36:56,516 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 04:36:56,516 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 04:36:56,516 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 04:36:56,651 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:36:56" (1/1) ... [2020-08-22 04:36:56,653 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:36:56" (1/1) ... [2020-08-22 04:36:56,677 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:36:56" (1/1) ... [2020-08-22 04:36:56,677 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:36:56" (1/1) ... [2020-08-22 04:36:56,703 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:36:56" (1/1) ... [2020-08-22 04:36:56,713 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:36:56" (1/1) ... [2020-08-22 04:36:56,723 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:36:56" (1/1) ... [2020-08-22 04:36:56,727 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 04:36:56,731 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 04:36:56,731 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 04:36:56,731 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 04:36:56,733 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:36:56" (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 [2020-08-22 04:36:56,820 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 04:36:56,821 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 04:36:56,821 INFO L138 BoogieDeclarations]: Found implementation of procedure trunc_float [2020-08-22 04:36:56,822 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_float [2020-08-22 04:36:56,822 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 04:36:56,822 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 04:36:56,822 INFO L130 BoogieDeclarations]: Found specification of procedure trunc_float [2020-08-22 04:36:56,822 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-22 04:36:56,823 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-08-22 04:36:56,823 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-22 04:36:56,824 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-22 04:36:56,824 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-22 04:36:56,824 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-08-22 04:36:56,824 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_float [2020-08-22 04:36:56,824 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 04:36:56,826 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 04:36:56,826 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 04:36:57,223 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 04:36:57,223 INFO L295 CfgBuilder]: Removed 8 assume(true) statements. [2020-08-22 04:36:57,227 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:36:57 BoogieIcfgContainer [2020-08-22 04:36:57,227 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 04:36:57,228 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 04:36:57,229 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 04:36:57,231 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 04:36:57,232 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 04:36:56" (1/3) ... [2020-08-22 04:36:57,233 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e193ea1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:36:57, skipping insertion in model container [2020-08-22 04:36:57,233 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:36:56" (2/3) ... [2020-08-22 04:36:57,233 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e193ea1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:36:57, skipping insertion in model container [2020-08-22 04:36:57,233 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:36:57" (3/3) ... [2020-08-22 04:36:57,235 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_1072d.c [2020-08-22 04:36:57,245 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 04:36:57,252 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 04:36:57,265 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 04:36:57,286 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 04:36:57,287 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 04:36:57,287 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 04:36:57,287 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 04:36:57,288 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 04:36:57,288 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 04:36:57,288 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 04:36:57,288 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 04:36:57,307 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-08-22 04:36:57,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-22 04:36:57,314 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:36:57,315 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:36:57,315 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:36:57,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:36:57,322 INFO L82 PathProgramCache]: Analyzing trace with hash 753691903, now seen corresponding path program 1 times [2020-08-22 04:36:57,330 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:36:57,331 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1815185899] [2020-08-22 04:36:57,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:36:57,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:36:57,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:36:57,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:36:57,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 04:36:57,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:36:57,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:36:57,533 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1815185899] [2020-08-22 04:36:57,535 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:36:57,535 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 04:36:57,536 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005585094] [2020-08-22 04:36:57,541 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 04:36:57,541 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:36:57,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 04:36:57,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 04:36:57,557 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 4 states. [2020-08-22 04:36:57,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:36:57,727 INFO L93 Difference]: Finished difference Result 68 states and 93 transitions. [2020-08-22 04:36:57,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 04:36:57,729 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-08-22 04:36:57,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:36:57,738 INFO L225 Difference]: With dead ends: 68 [2020-08-22 04:36:57,738 INFO L226 Difference]: Without dead ends: 34 [2020-08-22 04:36:57,742 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 [2020-08-22 04:36:57,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-08-22 04:36:57,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-08-22 04:36:57,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-08-22 04:36:57,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2020-08-22 04:36:57,785 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 18 [2020-08-22 04:36:57,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:36:57,786 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2020-08-22 04:36:57,786 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 04:36:57,786 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2020-08-22 04:36:57,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-22 04:36:57,787 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:36:57,788 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:36:57,788 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 04:36:57,788 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:36:57,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:36:57,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1111015325, now seen corresponding path program 1 times [2020-08-22 04:36:57,789 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:36:57,790 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [3590956] [2020-08-22 04:36:57,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:36:57,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 04:36:57,859 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-22 04:36:57,859 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 04:36:57,864 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 04:36:57,878 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 04:36:57 BoogieIcfgContainer [2020-08-22 04:36:57,878 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 04:36:57,881 INFO L168 Benchmark]: Toolchain (without parser) took 1673.57 ms. Allocated memory was 140.5 MB in the beginning and 206.6 MB in the end (delta: 66.1 MB). Free memory was 103.9 MB in the beginning and 122.6 MB in the end (delta: -18.7 MB). Peak memory consumption was 47.4 MB. Max. memory is 7.1 GB. [2020-08-22 04:36:57,882 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-22 04:36:57,883 INFO L168 Benchmark]: CACSL2BoogieTranslator took 304.61 ms. Allocated memory is still 140.5 MB. Free memory was 103.5 MB in the beginning and 92.7 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. [2020-08-22 04:36:57,884 INFO L168 Benchmark]: Boogie Preprocessor took 211.48 ms. Allocated memory was 140.5 MB in the beginning and 206.6 MB in the end (delta: 66.1 MB). Free memory was 92.7 MB in the beginning and 183.4 MB in the end (delta: -90.8 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. [2020-08-22 04:36:57,885 INFO L168 Benchmark]: RCFGBuilder took 496.21 ms. Allocated memory is still 206.6 MB. Free memory was 183.4 MB in the beginning and 163.8 MB in the end (delta: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 7.1 GB. [2020-08-22 04:36:57,886 INFO L168 Benchmark]: TraceAbstraction took 650.13 ms. Allocated memory is still 206.6 MB. Free memory was 163.1 MB in the beginning and 122.6 MB in the end (delta: 40.5 MB). Peak memory consumption was 40.5 MB. Max. memory is 7.1 GB. [2020-08-22 04:36:57,890 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 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 304.61 ms. Allocated memory is still 140.5 MB. Free memory was 103.5 MB in the beginning and 92.7 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 211.48 ms. Allocated memory was 140.5 MB in the beginning and 206.6 MB in the end (delta: 66.1 MB). Free memory was 92.7 MB in the beginning and 183.4 MB in the end (delta: -90.8 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 496.21 ms. Allocated memory is still 206.6 MB. Free memory was 183.4 MB in the beginning and 163.8 MB in the end (delta: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 650.13 ms. Allocated memory is still 206.6 MB. Free memory was 163.1 MB in the beginning and 122.6 MB in the end (delta: 40.5 MB). Peak memory consumption was 40.5 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: 0.5s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, 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, 0.0s 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...