/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 -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 16:14:06,924 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 16:14:06,927 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 16:14:06,955 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 16:14:06,956 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 16:14:06,957 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 16:14:06,958 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 16:14:06,960 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 16:14:06,962 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 16:14:06,963 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 16:14:06,964 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 16:14:06,965 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 16:14:06,965 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 16:14:06,967 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 16:14:06,968 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 16:14:06,969 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 16:14:06,970 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 16:14:06,971 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 16:14:06,972 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 16:14:06,974 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 16:14:06,976 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 16:14:06,977 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 16:14:06,978 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 16:14:06,979 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 16:14:06,982 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 16:14:06,982 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 16:14:06,982 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 16:14:06,983 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 16:14:06,984 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 16:14:06,985 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 16:14:06,985 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 16:14:06,986 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 16:14:06,987 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 16:14:06,987 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 16:14:06,988 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 16:14:06,989 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 16:14:06,989 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 16:14:06,990 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 16:14:06,990 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 16:14:06,991 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 16:14:06,992 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 16:14:06,992 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 16:14:07,023 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 16:14:07,023 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 16:14:07,024 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 16:14:07,025 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 16:14:07,025 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 16:14:07,025 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 16:14:07,025 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 16:14:07,026 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 16:14:07,026 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 16:14:07,027 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 16:14:07,028 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 16:14:07,028 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 16:14:07,028 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 16:14:07,028 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 16:14:07,028 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 16:14:07,029 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 16:14:07,029 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 16:14:07,029 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 16:14:07,029 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 16:14:07,029 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 16:14:07,030 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 16:14:07,030 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 16:14:07,030 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 16:14:07,030 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 16:14:07,030 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 16:14:07,031 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 16:14:07,032 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 16:14:07,032 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 16:14:07,032 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 16:14:07,032 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 [2020-08-18 16:14:07,350 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 16:14:07,363 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 16:14:07,367 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 16:14:07,368 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 16:14:07,369 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 16:14:07,370 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1130a.c [2020-08-18 16:14:07,433 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4afbbdc55/0d7b9915b98e46f4a43b949478e4fb80/FLAGfcc55b42b [2020-08-18 16:14:07,843 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 16:14:07,843 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-newlib/float_req_bl_1130a.c [2020-08-18 16:14:07,857 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4afbbdc55/0d7b9915b98e46f4a43b949478e4fb80/FLAGfcc55b42b [2020-08-18 16:14:08,269 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4afbbdc55/0d7b9915b98e46f4a43b949478e4fb80 [2020-08-18 16:14:08,279 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 16:14:08,281 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 16:14:08,283 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 16:14:08,284 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 16:14:08,287 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 16:14:08,288 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 04:14:08" (1/1) ... [2020-08-18 16:14:08,291 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f14d527 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:14:08, skipping insertion in model container [2020-08-18 16:14:08,291 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 04:14:08" (1/1) ... [2020-08-18 16:14:08,299 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 16:14:08,335 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 16:14:08,616 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 16:14:08,622 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 16:14:08,757 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 16:14:08,778 INFO L208 MainTranslator]: Completed translation [2020-08-18 16:14:08,779 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:14:08 WrapperNode [2020-08-18 16:14:08,779 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 16:14:08,780 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 16:14:08,780 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 16:14:08,780 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 16:14:08,791 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:14:08" (1/1) ... [2020-08-18 16:14:08,791 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:14:08" (1/1) ... [2020-08-18 16:14:08,802 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:14:08" (1/1) ... [2020-08-18 16:14:08,802 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:14:08" (1/1) ... [2020-08-18 16:14:08,817 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:14:08" (1/1) ... [2020-08-18 16:14:08,826 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:14:08" (1/1) ... [2020-08-18 16:14:08,828 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:14:08" (1/1) ... [2020-08-18 16:14:08,832 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 16:14:08,833 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 16:14:08,833 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 16:14:08,833 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 16:14:08,834 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:14:08" (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 16:14:08,893 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 16:14:08,893 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 16:14:08,894 INFO L138 BoogieDeclarations]: Found implementation of procedure fmod_float [2020-08-18 16:14:08,894 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_float [2020-08-18 16:14:08,894 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 16:14:08,894 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 16:14:08,894 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2020-08-18 16:14:08,894 INFO L130 BoogieDeclarations]: Found specification of procedure fmod_float [2020-08-18 16:14:08,895 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-18 16:14:08,895 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-08-18 16:14:08,895 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-18 16:14:08,895 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 16:14:08,895 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-08-18 16:14:08,895 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-18 16:14:08,896 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_float [2020-08-18 16:14:08,896 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 16:14:08,896 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 16:14:08,896 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real [2020-08-18 16:14:08,896 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 16:14:09,372 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 16:14:09,372 INFO L295 CfgBuilder]: Removed 14 assume(true) statements. [2020-08-18 16:14:09,376 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 04:14:09 BoogieIcfgContainer [2020-08-18 16:14:09,377 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 16:14:09,378 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 16:14:09,378 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 16:14:09,381 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 16:14:09,382 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 04:14:08" (1/3) ... [2020-08-18 16:14:09,382 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@649a3f97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 04:14:09, skipping insertion in model container [2020-08-18 16:14:09,383 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:14:08" (2/3) ... [2020-08-18 16:14:09,383 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@649a3f97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 04:14:09, skipping insertion in model container [2020-08-18 16:14:09,383 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 04:14:09" (3/3) ... [2020-08-18 16:14:09,385 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_1130a.c [2020-08-18 16:14:09,396 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 16:14:09,404 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 16:14:09,418 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 16:14:09,444 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 16:14:09,444 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 16:14:09,444 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 16:14:09,444 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 16:14:09,445 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 16:14:09,445 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 16:14:09,445 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 16:14:09,445 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 16:14:09,464 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states. [2020-08-18 16:14:09,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-18 16:14:09,470 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:14:09,470 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 16:14:09,471 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:14:09,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:14:09,476 INFO L82 PathProgramCache]: Analyzing trace with hash 1920116781, now seen corresponding path program 1 times [2020-08-18 16:14:09,483 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:14:09,483 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1982616668] [2020-08-18 16:14:09,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:14:09,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:14:09,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:14:09,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:14:09,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 16:14:09,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:14:09,739 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 16:14:09,740 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1982616668] [2020-08-18 16:14:09,742 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:14:09,743 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 16:14:09,744 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333925612] [2020-08-18 16:14:09,749 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 16:14:09,750 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:14:09,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 16:14:09,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 16:14:09,769 INFO L87 Difference]: Start difference. First operand 61 states. Second operand 4 states. [2020-08-18 16:14:10,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:14:10,078 INFO L93 Difference]: Finished difference Result 116 states and 180 transitions. [2020-08-18 16:14:10,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 16:14:10,080 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-08-18 16:14:10,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:14:10,092 INFO L225 Difference]: With dead ends: 116 [2020-08-18 16:14:10,092 INFO L226 Difference]: Without dead ends: 56 [2020-08-18 16:14:10,096 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 16:14:10,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-08-18 16:14:10,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-08-18 16:14:10,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-08-18 16:14:10,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 72 transitions. [2020-08-18 16:14:10,146 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 72 transitions. Word has length 19 [2020-08-18 16:14:10,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:14:10,147 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 72 transitions. [2020-08-18 16:14:10,147 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 16:14:10,147 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 72 transitions. [2020-08-18 16:14:10,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-18 16:14:10,148 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:14:10,149 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 16:14:10,149 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 16:14:10,149 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:14:10,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:14:10,150 INFO L82 PathProgramCache]: Analyzing trace with hash -2095475350, now seen corresponding path program 1 times [2020-08-18 16:14:10,150 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:14:10,151 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1338771460] [2020-08-18 16:14:10,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:14:10,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 16:14:10,244 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 16:14:10,244 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 16:14:10,249 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 16:14:10,268 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 04:14:10 BoogieIcfgContainer [2020-08-18 16:14:10,268 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 16:14:10,271 INFO L168 Benchmark]: Toolchain (without parser) took 1989.59 ms. Allocated memory was 137.4 MB in the beginning and 199.8 MB in the end (delta: 62.4 MB). Free memory was 98.7 MB in the beginning and 92.0 MB in the end (delta: 6.7 MB). Peak memory consumption was 69.1 MB. Max. memory is 7.1 GB. [2020-08-18 16:14:10,272 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 137.4 MB. Free memory was 117.6 MB in the beginning and 117.4 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-18 16:14:10,273 INFO L168 Benchmark]: CACSL2BoogieTranslator took 496.28 ms. Allocated memory was 137.4 MB in the beginning and 199.8 MB in the end (delta: 62.4 MB). Free memory was 98.3 MB in the beginning and 176.2 MB in the end (delta: -77.9 MB). Peak memory consumption was 22.4 MB. Max. memory is 7.1 GB. [2020-08-18 16:14:10,274 INFO L168 Benchmark]: Boogie Preprocessor took 52.34 ms. Allocated memory is still 199.8 MB. Free memory was 176.2 MB in the beginning and 173.5 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. [2020-08-18 16:14:10,275 INFO L168 Benchmark]: RCFGBuilder took 544.23 ms. Allocated memory is still 199.8 MB. Free memory was 173.5 MB in the beginning and 145.2 MB in the end (delta: 28.4 MB). Peak memory consumption was 28.4 MB. Max. memory is 7.1 GB. [2020-08-18 16:14:10,276 INFO L168 Benchmark]: TraceAbstraction took 890.55 ms. Allocated memory is still 199.8 MB. Free memory was 144.5 MB in the beginning and 92.0 MB in the end (delta: 52.5 MB). Peak memory consumption was 52.5 MB. Max. memory is 7.1 GB. [2020-08-18 16:14:10,280 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 137.4 MB. Free memory was 117.6 MB in the beginning and 117.4 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 496.28 ms. Allocated memory was 137.4 MB in the beginning and 199.8 MB in the end (delta: 62.4 MB). Free memory was 98.3 MB in the beginning and 176.2 MB in the end (delta: -77.9 MB). Peak memory consumption was 22.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 52.34 ms. Allocated memory is still 199.8 MB. Free memory was 176.2 MB in the beginning and 173.5 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 544.23 ms. Allocated memory is still 199.8 MB. Free memory was 173.5 MB in the beginning and 145.2 MB in the end (delta: 28.4 MB). Peak memory consumption was 28.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 890.55 ms. Allocated memory is still 199.8 MB. Free memory was 144.5 MB in the beginning and 92.0 MB in the end (delta: 52.5 MB). Peak memory consumption was 52.5 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: 0.8s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.3s, 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...