/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=SMALLEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/float-newlib/float_req_bl_1252a.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 17:02:22,403 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 17:02:22,405 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 17:02:22,438 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 17:02:22,439 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 17:02:22,448 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 17:02:22,450 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 17:02:22,454 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 17:02:22,456 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 17:02:22,459 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 17:02:22,460 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 17:02:22,461 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 17:02:22,461 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 17:02:22,464 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 17:02:22,466 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 17:02:22,468 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 17:02:22,469 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 17:02:22,471 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 17:02:22,473 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 17:02:22,481 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 17:02:22,483 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 17:02:22,484 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 17:02:22,485 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 17:02:22,485 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 17:02:22,501 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 17:02:22,515 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 17:02:22,516 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 17:02:22,517 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 17:02:22,518 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 17:02:22,552 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 17:02:22,552 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 17:02:22,553 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 17:02:22,553 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 17:02:22,554 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 17:02:22,554 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 17:02:22,554 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 17:02:22,554 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 17:02:22,554 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 17:02:22,555 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 17:02:22,555 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 17:02:22,555 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 17:02:22,555 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 17:02:22,555 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 17:02:22,555 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 17:02:22,556 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 17:02:22,556 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 17:02:22,556 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 17:02:22,556 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 17:02:22,556 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 17:02:22,557 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 17:02:22,557 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 17:02:22,557 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 17:02:22,557 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 17:02:22,557 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 17:02:22,558 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 17:02:22,558 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 17:02:22,558 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 17:02:22,558 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 17:02:22,558 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=SMALLEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLEST; [2020-08-18 17:02:22,846 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 17:02:22,861 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 17:02:22,866 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 17:02:22,868 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 17:02:22,869 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 17:02:22,870 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1252a.c [2020-08-18 17:02:22,947 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/11a7bc8f9/91adb60feddb41cf90bb0e4a90be5d5e/FLAG326e3fc9f [2020-08-18 17:02:23,393 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 17:02:23,395 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-newlib/float_req_bl_1252a.c [2020-08-18 17:02:23,403 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/11a7bc8f9/91adb60feddb41cf90bb0e4a90be5d5e/FLAG326e3fc9f [2020-08-18 17:02:23,751 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/11a7bc8f9/91adb60feddb41cf90bb0e4a90be5d5e [2020-08-18 17:02:23,762 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 17:02:23,763 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 17:02:23,764 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 17:02:23,765 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 17:02:23,768 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 17:02:23,769 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 05:02:23" (1/1) ... [2020-08-18 17:02:23,772 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43889371 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:02:23, skipping insertion in model container [2020-08-18 17:02:23,773 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 05:02:23" (1/1) ... [2020-08-18 17:02:23,780 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 17:02:23,806 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 17:02:24,005 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 17:02:24,009 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 17:02:24,037 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 17:02:24,060 INFO L208 MainTranslator]: Completed translation [2020-08-18 17:02:24,060 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:02:24 WrapperNode [2020-08-18 17:02:24,061 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 17:02:24,061 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 17:02:24,062 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 17:02:24,062 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 17:02:24,154 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:02:24" (1/1) ... [2020-08-18 17:02:24,154 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:02:24" (1/1) ... [2020-08-18 17:02:24,163 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:02:24" (1/1) ... [2020-08-18 17:02:24,163 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:02:24" (1/1) ... [2020-08-18 17:02:24,174 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:02:24" (1/1) ... [2020-08-18 17:02:24,180 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:02:24" (1/1) ... [2020-08-18 17:02:24,181 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:02:24" (1/1) ... [2020-08-18 17:02:24,184 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 17:02:24,185 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 17:02:24,185 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 17:02:24,185 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 17:02:24,186 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:02:24" (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 17:02:24,243 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 17:02:24,243 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 17:02:24,244 INFO L138 BoogieDeclarations]: Found implementation of procedure __fpclassify_float [2020-08-18 17:02:24,244 INFO L138 BoogieDeclarations]: Found implementation of procedure fmax_float [2020-08-18 17:02:24,244 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_float [2020-08-18 17:02:24,244 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 17:02:24,244 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 17:02:24,245 INFO L130 BoogieDeclarations]: Found specification of procedure __fpclassify_float [2020-08-18 17:02:24,245 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-18 17:02:24,245 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-08-18 17:02:24,245 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-18 17:02:24,245 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 17:02:24,245 INFO L130 BoogieDeclarations]: Found specification of procedure fmax_float [2020-08-18 17:02:24,246 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_float [2020-08-18 17:02:24,246 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 17:02:24,246 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 17:02:24,246 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 17:02:24,246 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-18 17:02:24,246 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-08-18 17:02:24,613 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 17:02:24,614 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-08-18 17:02:24,618 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 05:02:24 BoogieIcfgContainer [2020-08-18 17:02:24,618 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 17:02:24,619 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 17:02:24,620 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 17:02:24,623 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 17:02:24,623 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 05:02:23" (1/3) ... [2020-08-18 17:02:24,624 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a315bdf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 05:02:24, skipping insertion in model container [2020-08-18 17:02:24,624 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:02:24" (2/3) ... [2020-08-18 17:02:24,625 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a315bdf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 05:02:24, skipping insertion in model container [2020-08-18 17:02:24,625 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 05:02:24" (3/3) ... [2020-08-18 17:02:24,626 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_1252a.c [2020-08-18 17:02:24,637 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 17:02:24,644 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 17:02:24,657 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 17:02:24,680 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 17:02:24,681 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 17:02:24,681 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 17:02:24,681 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 17:02:24,681 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 17:02:24,681 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 17:02:24,681 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 17:02:24,682 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 17:02:24,701 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-08-18 17:02:24,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-18 17:02:24,709 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:02:24,710 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:02:24,710 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:02:24,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:02:24,715 INFO L82 PathProgramCache]: Analyzing trace with hash 1078913502, now seen corresponding path program 1 times [2020-08-18 17:02:24,723 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:02:24,724 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1655061694] [2020-08-18 17:02:24,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:02:24,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:24,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:02:24,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:24,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 17:02:24,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:24,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 17:02:24,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:24,957 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 17:02:24,958 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1655061694] [2020-08-18 17:02:24,960 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:02:24,960 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 17:02:24,961 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533902802] [2020-08-18 17:02:24,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 17:02:24,967 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:02:24,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 17:02:24,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 17:02:24,988 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-08-18 17:02:25,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:02:25,211 INFO L93 Difference]: Finished difference Result 79 states and 107 transitions. [2020-08-18 17:02:25,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 17:02:25,214 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-08-18 17:02:25,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:02:25,226 INFO L225 Difference]: With dead ends: 79 [2020-08-18 17:02:25,226 INFO L226 Difference]: Without dead ends: 40 [2020-08-18 17:02:25,231 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 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 17:02:25,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-08-18 17:02:25,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-08-18 17:02:25,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-08-18 17:02:25,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2020-08-18 17:02:25,279 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 22 [2020-08-18 17:02:25,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:02:25,279 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2020-08-18 17:02:25,280 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 17:02:25,280 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2020-08-18 17:02:25,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-18 17:02:25,282 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:02:25,282 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:02:25,283 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 17:02:25,283 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:02:25,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:02:25,284 INFO L82 PathProgramCache]: Analyzing trace with hash 1357269066, now seen corresponding path program 1 times [2020-08-18 17:02:25,284 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:02:25,284 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [211163934] [2020-08-18 17:02:25,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:02:25,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:25,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:02:25,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:25,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 17:02:25,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:25,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 17:02:25,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:25,472 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 17:02:25,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [211163934] [2020-08-18 17:02:25,473 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:02:25,474 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 17:02:25,477 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712043798] [2020-08-18 17:02:25,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 17:02:25,480 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:02:25,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 17:02:25,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-18 17:02:25,481 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand 6 states. [2020-08-18 17:02:25,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:02:25,762 INFO L93 Difference]: Finished difference Result 59 states and 69 transitions. [2020-08-18 17:02:25,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 17:02:25,763 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-08-18 17:02:25,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:02:25,766 INFO L225 Difference]: With dead ends: 59 [2020-08-18 17:02:25,767 INFO L226 Difference]: Without dead ends: 44 [2020-08-18 17:02:25,768 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-08-18 17:02:25,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-08-18 17:02:25,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-08-18 17:02:25,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-08-18 17:02:25,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2020-08-18 17:02:25,781 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 23 [2020-08-18 17:02:25,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:02:25,782 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2020-08-18 17:02:25,782 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 17:02:25,782 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2020-08-18 17:02:25,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-18 17:02:25,783 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:02:25,784 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:02:25,784 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 17:02:25,784 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:02:25,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:02:25,785 INFO L82 PathProgramCache]: Analyzing trace with hash 888409989, now seen corresponding path program 1 times [2020-08-18 17:02:25,785 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:02:25,785 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1381597730] [2020-08-18 17:02:25,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:02:25,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:25,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:02:25,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:25,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 17:02:25,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:25,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 17:02:25,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:25,909 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 17:02:25,909 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1381597730] [2020-08-18 17:02:25,910 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:02:25,910 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 17:02:25,910 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933260487] [2020-08-18 17:02:25,911 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 17:02:25,911 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:02:25,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 17:02:25,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-18 17:02:25,912 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand 6 states. [2020-08-18 17:02:26,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:02:26,104 INFO L93 Difference]: Finished difference Result 63 states and 74 transitions. [2020-08-18 17:02:26,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 17:02:26,105 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2020-08-18 17:02:26,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:02:26,106 INFO L225 Difference]: With dead ends: 63 [2020-08-18 17:02:26,107 INFO L226 Difference]: Without dead ends: 48 [2020-08-18 17:02:26,107 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-08-18 17:02:26,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-08-18 17:02:26,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2020-08-18 17:02:26,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-08-18 17:02:26,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2020-08-18 17:02:26,118 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 26 [2020-08-18 17:02:26,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:02:26,118 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2020-08-18 17:02:26,118 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 17:02:26,118 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2020-08-18 17:02:26,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-18 17:02:26,119 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:02:26,120 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:02:26,120 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 17:02:26,120 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:02:26,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:02:26,121 INFO L82 PathProgramCache]: Analyzing trace with hash -908541370, now seen corresponding path program 1 times [2020-08-18 17:02:26,121 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:02:26,121 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1348918895] [2020-08-18 17:02:26,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:02:26,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 17:02:26,143 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 17:02:26,143 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 17:02:26,148 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 17:02:26,165 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 05:02:26 BoogieIcfgContainer [2020-08-18 17:02:26,165 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 17:02:26,168 INFO L168 Benchmark]: Toolchain (without parser) took 2403.70 ms. Allocated memory was 141.6 MB in the beginning and 233.8 MB in the end (delta: 92.3 MB). Free memory was 104.6 MB in the beginning and 139.3 MB in the end (delta: -34.7 MB). Peak memory consumption was 57.6 MB. Max. memory is 7.1 GB. [2020-08-18 17:02:26,169 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 141.6 MB. Free memory was 123.1 MB in the beginning and 122.9 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-18 17:02:26,170 INFO L168 Benchmark]: CACSL2BoogieTranslator took 296.56 ms. Allocated memory is still 141.6 MB. Free memory was 104.4 MB in the beginning and 93.4 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. [2020-08-18 17:02:26,171 INFO L168 Benchmark]: Boogie Preprocessor took 123.27 ms. Allocated memory was 141.6 MB in the beginning and 204.5 MB in the end (delta: 62.9 MB). Free memory was 93.4 MB in the beginning and 181.8 MB in the end (delta: -88.3 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. [2020-08-18 17:02:26,172 INFO L168 Benchmark]: RCFGBuilder took 433.19 ms. Allocated memory is still 204.5 MB. Free memory was 181.8 MB in the beginning and 161.9 MB in the end (delta: 19.9 MB). Peak memory consumption was 19.9 MB. Max. memory is 7.1 GB. [2020-08-18 17:02:26,173 INFO L168 Benchmark]: TraceAbstraction took 1545.60 ms. Allocated memory was 204.5 MB in the beginning and 233.8 MB in the end (delta: 29.4 MB). Free memory was 161.2 MB in the beginning and 139.3 MB in the end (delta: 21.9 MB). Peak memory consumption was 51.3 MB. Max. memory is 7.1 GB. [2020-08-18 17:02:26,177 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 141.6 MB. Free memory was 123.1 MB in the beginning and 122.9 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 296.56 ms. Allocated memory is still 141.6 MB. Free memory was 104.4 MB in the beginning and 93.4 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 123.27 ms. Allocated memory was 141.6 MB in the beginning and 204.5 MB in the end (delta: 62.9 MB). Free memory was 93.4 MB in the beginning and 181.8 MB in the end (delta: -88.3 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 433.19 ms. Allocated memory is still 204.5 MB. Free memory was 181.8 MB in the beginning and 161.9 MB in the end (delta: 19.9 MB). Peak memory consumption was 19.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1545.60 ms. Allocated memory was 204.5 MB in the beginning and 233.8 MB in the end (delta: 29.4 MB). Free memory was 161.2 MB in the beginning and 139.3 MB in the end (delta: 21.9 MB). Peak memory consumption was 51.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 79]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 78, overapproximation of someUnaryFLOAToperation at line 72. Possible FailurePath: [L72] float x = -0.0f; [L73] float y = 0.0f; [L75] CALL, EXPR fmax_float(x, y) [L43] CALL, EXPR __fpclassify_float(x) [L20] __uint32_t w; [L23] ieee_float_shape_type gf_u; [L24] gf_u.value = (x) [L25] EXPR gf_u.word [L25] (w) = gf_u.word [L28] COND FALSE !(w == 0x00000000 || w == 0x80000000) [L30-L31] COND FALSE !((w >= 0x00800000 && w <= 0x7f7fffff) || (w >= 0x80800000 && w <= 0xff7fffff)) [L33-L34] COND FALSE !((w >= 0x00000001 && w <= 0x007fffff) || (w >= 0x80000001 && w <= 0x807fffff)) [L36] COND FALSE !(w == 0x7f800000 || w == 0xff800000) [L39] return 0; [L43] RET, EXPR __fpclassify_float(x) [L43] COND TRUE __fpclassify_float(x) == 0 [L44] return y; [L75] RET, EXPR fmax_float(x, y) [L75] float res = fmax_float(x, y); [L78] EXPR res == 0.0f && __signbit_float(res) == 0 [L78] COND TRUE !(res == 0.0f && __signbit_float(res) == 0) [L79] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 44 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.4s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 123 SDtfs, 117 SDslu, 43 SDs, 0 SdLazy, 296 SolverSat, 56 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=44occurred 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, 3 MinimizatonAttempts, 4 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 97 NumberOfCodeBlocks, 97 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 68 ConstructedInterpolants, 0 QuantifiedInterpolants, 4170 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 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...