/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=BIGGEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/float-newlib/float_req_bl_1130a.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 17:50:40,410 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 17:50:40,412 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 17:50:40,436 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 17:50:40,436 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 17:50:40,438 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 17:50:40,439 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 17:50:40,441 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 17:50:40,442 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 17:50:40,443 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 17:50:40,444 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 17:50:40,446 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 17:50:40,446 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 17:50:40,447 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 17:50:40,448 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 17:50:40,449 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 17:50:40,450 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 17:50:40,451 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 17:50:40,453 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 17:50:40,455 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 17:50:40,457 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 17:50:40,458 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 17:50:40,459 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 17:50:40,460 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 17:50:40,463 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 17:50:40,464 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 17:50:40,464 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 17:50:40,465 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 17:50:40,465 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 17:50:40,466 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 17:50:40,467 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 17:50:40,467 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 17:50:40,468 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 17:50:40,469 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 17:50:40,470 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 17:50:40,470 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 17:50:40,471 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 17:50:40,471 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 17:50:40,471 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 17:50:40,472 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 17:50:40,473 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 17:50:40,474 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 [2020-08-18 17:50:40,500 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 17:50:40,501 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 17:50:40,502 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 17:50:40,502 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 17:50:40,502 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 17:50:40,503 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 17:50:40,503 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 17:50:40,503 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 17:50:40,503 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 17:50:40,503 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 17:50:40,504 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 17:50:40,504 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 17:50:40,504 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 17:50:40,504 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 17:50:40,504 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 17:50:40,505 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 17:50:40,505 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 17:50:40,505 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 17:50:40,505 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 17:50:40,505 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 17:50:40,506 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 17:50:40,506 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 17:50:40,506 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 17:50:40,506 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 17:50:40,506 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 17:50:40,507 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 17:50:40,507 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 17:50:40,507 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 17:50:40,507 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 17:50:40,507 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=BIGGEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=BIGGEST; [2020-08-18 17:50:40,787 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 17:50:40,805 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 17:50:40,811 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 17:50:40,813 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 17:50:40,813 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 17:50:40,816 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1130a.c [2020-08-18 17:50:40,886 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/35ad1bcd2/ba3ad936dd564b14a174a29c06e106dc/FLAGec44d2af0 [2020-08-18 17:50:41,370 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 17:50:41,371 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-newlib/float_req_bl_1130a.c [2020-08-18 17:50:41,380 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/35ad1bcd2/ba3ad936dd564b14a174a29c06e106dc/FLAGec44d2af0 [2020-08-18 17:50:41,692 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/35ad1bcd2/ba3ad936dd564b14a174a29c06e106dc [2020-08-18 17:50:41,700 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 17:50:41,701 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 17:50:41,702 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 17:50:41,703 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 17:50:41,706 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 17:50:41,707 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 05:50:41" (1/1) ... [2020-08-18 17:50:41,710 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@130f673b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:50:41, skipping insertion in model container [2020-08-18 17:50:41,710 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 05:50:41" (1/1) ... [2020-08-18 17:50:41,718 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 17:50:41,752 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 17:50:42,029 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 17:50:42,035 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 17:50:42,196 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 17:50:42,227 INFO L208 MainTranslator]: Completed translation [2020-08-18 17:50:42,227 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:50:42 WrapperNode [2020-08-18 17:50:42,228 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 17:50:42,228 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 17:50:42,228 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 17:50:42,229 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 17:50:42,239 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:50:42" (1/1) ... [2020-08-18 17:50:42,239 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:50:42" (1/1) ... [2020-08-18 17:50:42,251 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:50:42" (1/1) ... [2020-08-18 17:50:42,251 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:50:42" (1/1) ... [2020-08-18 17:50:42,266 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:50:42" (1/1) ... [2020-08-18 17:50:42,275 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:50:42" (1/1) ... [2020-08-18 17:50:42,278 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:50:42" (1/1) ... [2020-08-18 17:50:42,284 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 17:50:42,284 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 17:50:42,285 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 17:50:42,285 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 17:50:42,286 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:50:42" (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 [2020-08-18 17:50:42,349 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 17:50:42,349 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 17:50:42,349 INFO L138 BoogieDeclarations]: Found implementation of procedure fmod_float [2020-08-18 17:50:42,350 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_float [2020-08-18 17:50:42,350 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 17:50:42,350 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 17:50:42,350 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2020-08-18 17:50:42,350 INFO L130 BoogieDeclarations]: Found specification of procedure fmod_float [2020-08-18 17:50:42,350 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-18 17:50:42,351 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-08-18 17:50:42,351 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-18 17:50:42,351 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 17:50:42,351 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-08-18 17:50:42,351 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-18 17:50:42,351 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_float [2020-08-18 17:50:42,351 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 17:50:42,352 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 17:50:42,352 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real [2020-08-18 17:50:42,352 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 17:50:42,849 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 17:50:42,849 INFO L295 CfgBuilder]: Removed 14 assume(true) statements. [2020-08-18 17:50:42,853 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 05:50:42 BoogieIcfgContainer [2020-08-18 17:50:42,854 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 17:50:42,855 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 17:50:42,855 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 17:50:42,858 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 17:50:42,859 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 05:50:41" (1/3) ... [2020-08-18 17:50:42,860 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37f1a490 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 05:50:42, skipping insertion in model container [2020-08-18 17:50:42,860 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:50:42" (2/3) ... [2020-08-18 17:50:42,860 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37f1a490 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 05:50:42, skipping insertion in model container [2020-08-18 17:50:42,860 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 05:50:42" (3/3) ... [2020-08-18 17:50:42,862 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_1130a.c [2020-08-18 17:50:42,873 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 17:50:42,881 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 17:50:42,896 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 17:50:42,920 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 17:50:42,921 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 17:50:42,921 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 17:50:42,921 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 17:50:42,922 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 17:50:42,922 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 17:50:42,922 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 17:50:42,922 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 17:50:42,943 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states. [2020-08-18 17:50:42,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-18 17:50:42,951 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:50:42,952 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:50:42,953 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:50:42,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:50:42,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1920116781, now seen corresponding path program 1 times [2020-08-18 17:50:42,969 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:50:42,970 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2034477265] [2020-08-18 17:50:42,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:50:43,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:43,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:50:43,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:43,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 17:50:43,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:43,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:50:43,230 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2034477265] [2020-08-18 17:50:43,232 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:50:43,232 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 17:50:43,234 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125033703] [2020-08-18 17:50:43,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 17:50:43,240 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:50:43,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 17:50:43,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 17:50:43,258 INFO L87 Difference]: Start difference. First operand 61 states. Second operand 4 states. [2020-08-18 17:50:43,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:50:43,512 INFO L93 Difference]: Finished difference Result 116 states and 180 transitions. [2020-08-18 17:50:43,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:50:43,514 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-08-18 17:50:43,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:50:43,526 INFO L225 Difference]: With dead ends: 116 [2020-08-18 17:50:43,526 INFO L226 Difference]: Without dead ends: 56 [2020-08-18 17:50:43,530 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 [2020-08-18 17:50:43,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-08-18 17:50:43,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-08-18 17:50:43,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-08-18 17:50:43,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 72 transitions. [2020-08-18 17:50:43,580 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 72 transitions. Word has length 19 [2020-08-18 17:50:43,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:50:43,580 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 72 transitions. [2020-08-18 17:50:43,580 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 17:50:43,581 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 72 transitions. [2020-08-18 17:50:43,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-18 17:50:43,582 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:50:43,582 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] [2020-08-18 17:50:43,583 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 17:50:43,583 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:50:43,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:50:43,584 INFO L82 PathProgramCache]: Analyzing trace with hash -2095475350, now seen corresponding path program 1 times [2020-08-18 17:50:43,584 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:50:43,584 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [325773177] [2020-08-18 17:50:43,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:50:43,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 17:50:43,670 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 17:50:43,671 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 17:50:43,676 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 17:50:43,695 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 05:50:43 BoogieIcfgContainer [2020-08-18 17:50:43,695 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 17:50:43,698 INFO L168 Benchmark]: Toolchain (without parser) took 1995.52 ms. Allocated memory was 147.8 MB in the beginning and 203.4 MB in the end (delta: 55.6 MB). Free memory was 103.3 MB in the beginning and 95.6 MB in the end (delta: 7.7 MB). Peak memory consumption was 63.3 MB. Max. memory is 7.1 GB. [2020-08-18 17:50:43,699 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 147.8 MB. Free memory was 122.4 MB in the beginning and 122.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-18 17:50:43,700 INFO L168 Benchmark]: CACSL2BoogieTranslator took 525.57 ms. Allocated memory was 147.8 MB in the beginning and 203.4 MB in the end (delta: 55.6 MB). Free memory was 103.1 MB in the beginning and 180.0 MB in the end (delta: -76.9 MB). Peak memory consumption was 19.9 MB. Max. memory is 7.1 GB. [2020-08-18 17:50:43,701 INFO L168 Benchmark]: Boogie Preprocessor took 55.65 ms. Allocated memory is still 203.4 MB. Free memory was 180.0 MB in the beginning and 177.4 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. [2020-08-18 17:50:43,702 INFO L168 Benchmark]: RCFGBuilder took 569.47 ms. Allocated memory is still 203.4 MB. Free memory was 177.4 MB in the beginning and 148.7 MB in the end (delta: 28.7 MB). Peak memory consumption was 28.7 MB. Max. memory is 7.1 GB. [2020-08-18 17:50:43,703 INFO L168 Benchmark]: TraceAbstraction took 840.18 ms. Allocated memory is still 203.4 MB. Free memory was 148.1 MB in the beginning and 95.6 MB in the end (delta: 52.4 MB). Peak memory consumption was 52.4 MB. Max. memory is 7.1 GB. [2020-08-18 17:50:43,707 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 147.8 MB. Free memory was 122.4 MB in the beginning and 122.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 525.57 ms. Allocated memory was 147.8 MB in the beginning and 203.4 MB in the end (delta: 55.6 MB). Free memory was 103.1 MB in the beginning and 180.0 MB in the end (delta: -76.9 MB). Peak memory consumption was 19.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 55.65 ms. Allocated memory is still 203.4 MB. Free memory was 180.0 MB in the beginning and 177.4 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 569.47 ms. Allocated memory is still 203.4 MB. Free memory was 177.4 MB in the beginning and 148.7 MB in the end (delta: 28.7 MB). Peak memory consumption was 28.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 840.18 ms. Allocated memory is still 203.4 MB. Free memory was 148.1 MB in the beginning and 95.6 MB in the end (delta: 52.4 MB). Peak memory consumption was 52.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 135]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 134, overapproximation of someUnaryDOUBLEoperation at line 14, overapproximation of bitwiseAnd at line 30, overapproximation of bitwiseXor at line 31, overapproximation of someBinaryArithmeticFLOAToperation at line 35. Possible FailurePath: [L12-L15] static const float one_fmod = 1.0, Zero_fmod[] = { 0.0, -0.0, }; [L126] float x = 0.0f; [L127] float y = __VERIFIER_nondet_float(); [L129] COND TRUE (y < 0.0f || y > 0.0f) [L131] CALL, EXPR fmod_float(x, y) [L18] __int32_t n, hx, hy, hz, ix, iy, sx, i; [L21] ieee_float_shape_type gf_u; [L22] gf_u.value = (x) [L23] EXPR gf_u.word [L23] (hx) = gf_u.word [L26] ieee_float_shape_type gf_u; [L27] gf_u.value = (y) [L28] EXPR gf_u.word [L28] (hy) = gf_u.word [L30] sx = hx & 0x80000000 [L31] hx ^= sx [L32] hy &= 0x7fffffff [L34] COND TRUE ((hy) == 0) || !((hx) < 0x7f800000L) || ((hy) > 0x7f800000L) [L35] return (x * y) / (x * y); [L131] RET, EXPR fmod_float(x, y) [L131] float res = fmod_float(x, y); [L134] EXPR res == 0.0f && __signbit_float(res) == 0 [L134] COND TRUE !(res == 0.0f && __signbit_float(res) == 0) [L135] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 61 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.7s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 75 SDtfs, 14 SDslu, 61 SDs, 0 SdLazy, 80 SolverSat, 6 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=61occurred 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, 0.1s InterpolantComputationTime, 40 NumberOfCodeBlocks, 40 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 18 ConstructedInterpolants, 0 QuantifiedInterpolants, 918 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...