/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 11:17:46,312 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 11:17:46,314 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 11:17:46,340 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 11:17:46,340 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 11:17:46,341 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 11:17:46,343 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 11:17:46,345 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 11:17:46,346 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 11:17:46,347 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 11:17:46,348 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 11:17:46,349 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 11:17:46,350 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 11:17:46,351 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 11:17:46,352 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 11:17:46,353 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 11:17:46,354 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 11:17:46,355 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 11:17:46,357 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 11:17:46,358 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 11:17:46,360 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 11:17:46,361 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 11:17:46,362 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 11:17:46,363 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 11:17:46,368 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 11:17:46,370 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 11:17:46,370 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 11:17:46,371 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 11:17:46,374 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 11:17:46,375 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 11:17:46,376 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 11:17:46,376 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 11:17:46,377 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 11:17:46,380 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 11:17:46,381 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 11:17:46,381 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 11:17:46,382 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 11:17:46,382 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 11:17:46,382 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 11:17:46,384 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 11:17:46,385 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 11:17:46,387 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 11:17:46,435 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 11:17:46,436 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 11:17:46,437 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 11:17:46,437 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 11:17:46,437 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 11:17:46,440 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 11:17:46,441 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 11:17:46,441 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 11:17:46,441 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 11:17:46,441 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 11:17:46,442 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 11:17:46,442 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 11:17:46,442 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 11:17:46,442 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 11:17:46,442 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 11:17:46,442 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 11:17:46,443 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 11:17:46,444 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 11:17:46,444 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 11:17:46,444 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 11:17:46,444 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 11:17:46,445 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 11:17:46,445 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 11:17:46,445 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 11:17:46,445 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 11:17:46,445 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 11:17:46,446 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 11:17:46,446 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 11:17:46,446 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 11:17:46,447 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 11:17:46,772 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 11:17:46,783 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 11:17:46,787 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 11:17:46,788 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 11:17:46,789 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 11:17:46,789 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1130a.c [2020-08-18 11:17:46,867 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1afc2397d/10dc0d4b69c3484a97f37345a6f703da/FLAG78b969d3b [2020-08-18 11:17:47,377 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 11:17:47,377 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-newlib/float_req_bl_1130a.c [2020-08-18 11:17:47,383 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1afc2397d/10dc0d4b69c3484a97f37345a6f703da/FLAG78b969d3b [2020-08-18 11:17:47,710 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1afc2397d/10dc0d4b69c3484a97f37345a6f703da [2020-08-18 11:17:47,721 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 11:17:47,723 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 11:17:47,724 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 11:17:47,724 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 11:17:47,729 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 11:17:47,730 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 11:17:47" (1/1) ... [2020-08-18 11:17:47,734 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@414e1ef9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:17:47, skipping insertion in model container [2020-08-18 11:17:47,734 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 11:17:47" (1/1) ... [2020-08-18 11:17:47,743 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 11:17:47,775 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 11:17:47,986 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 11:17:47,991 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 11:17:48,111 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 11:17:48,134 INFO L208 MainTranslator]: Completed translation [2020-08-18 11:17:48,134 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:17:48 WrapperNode [2020-08-18 11:17:48,135 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 11:17:48,135 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 11:17:48,135 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 11:17:48,136 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 11:17:48,146 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:17:48" (1/1) ... [2020-08-18 11:17:48,147 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:17:48" (1/1) ... [2020-08-18 11:17:48,158 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:17:48" (1/1) ... [2020-08-18 11:17:48,158 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:17:48" (1/1) ... [2020-08-18 11:17:48,173 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:17:48" (1/1) ... [2020-08-18 11:17:48,182 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:17:48" (1/1) ... [2020-08-18 11:17:48,188 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:17:48" (1/1) ... [2020-08-18 11:17:48,196 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 11:17:48,198 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 11:17:48,198 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 11:17:48,198 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 11:17:48,199 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:17:48" (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 11:17:48,269 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 11:17:48,269 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 11:17:48,269 INFO L138 BoogieDeclarations]: Found implementation of procedure fmod_float [2020-08-18 11:17:48,269 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_float [2020-08-18 11:17:48,269 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 11:17:48,270 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 11:17:48,270 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2020-08-18 11:17:48,270 INFO L130 BoogieDeclarations]: Found specification of procedure fmod_float [2020-08-18 11:17:48,270 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-18 11:17:48,270 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-08-18 11:17:48,270 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-18 11:17:48,271 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 11:17:48,271 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-08-18 11:17:48,271 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-18 11:17:48,271 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_float [2020-08-18 11:17:48,272 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 11:17:48,272 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 11:17:48,272 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real [2020-08-18 11:17:48,273 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 11:17:48,750 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 11:17:48,750 INFO L295 CfgBuilder]: Removed 14 assume(true) statements. [2020-08-18 11:17:48,755 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 11:17:48 BoogieIcfgContainer [2020-08-18 11:17:48,755 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 11:17:48,757 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 11:17:48,757 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 11:17:48,760 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 11:17:48,760 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 11:17:47" (1/3) ... [2020-08-18 11:17:48,761 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f4e4c13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 11:17:48, skipping insertion in model container [2020-08-18 11:17:48,762 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:17:48" (2/3) ... [2020-08-18 11:17:48,762 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f4e4c13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 11:17:48, skipping insertion in model container [2020-08-18 11:17:48,762 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 11:17:48" (3/3) ... [2020-08-18 11:17:48,764 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_1130a.c [2020-08-18 11:17:48,775 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 11:17:48,784 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 11:17:48,798 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 11:17:48,825 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 11:17:48,825 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 11:17:48,825 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 11:17:48,825 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 11:17:48,826 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 11:17:48,826 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 11:17:48,826 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 11:17:48,826 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 11:17:48,847 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states. [2020-08-18 11:17:48,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-18 11:17:48,854 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:17:48,855 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 11:17:48,855 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:17:48,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:17:48,860 INFO L82 PathProgramCache]: Analyzing trace with hash 1920116781, now seen corresponding path program 1 times [2020-08-18 11:17:48,867 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:17:48,867 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1233384236] [2020-08-18 11:17:48,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:17:48,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:17:49,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:17:49,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:17:49,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 11:17:49,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:17:49,116 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 11:17:49,117 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1233384236] [2020-08-18 11:17:49,120 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:17:49,120 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 11:17:49,121 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369986823] [2020-08-18 11:17:49,127 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 11:17:49,127 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:17:49,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 11:17:49,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 11:17:49,146 INFO L87 Difference]: Start difference. First operand 61 states. Second operand 4 states. [2020-08-18 11:17:49,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:17:49,443 INFO L93 Difference]: Finished difference Result 116 states and 180 transitions. [2020-08-18 11:17:49,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 11:17:49,445 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-08-18 11:17:49,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:17:49,458 INFO L225 Difference]: With dead ends: 116 [2020-08-18 11:17:49,458 INFO L226 Difference]: Without dead ends: 56 [2020-08-18 11:17:49,462 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 11:17:49,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-08-18 11:17:49,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-08-18 11:17:49,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-08-18 11:17:49,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 72 transitions. [2020-08-18 11:17:49,515 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 72 transitions. Word has length 19 [2020-08-18 11:17:49,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:17:49,516 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 72 transitions. [2020-08-18 11:17:49,516 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 11:17:49,516 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 72 transitions. [2020-08-18 11:17:49,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-18 11:17:49,518 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:17:49,518 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 11:17:49,519 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 11:17:49,519 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:17:49,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:17:49,520 INFO L82 PathProgramCache]: Analyzing trace with hash -2095475350, now seen corresponding path program 1 times [2020-08-18 11:17:49,520 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:17:49,520 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1006667873] [2020-08-18 11:17:49,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:17:49,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 11:17:49,629 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 11:17:49,629 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 11:17:49,633 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 11:17:49,649 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 11:17:49 BoogieIcfgContainer [2020-08-18 11:17:49,649 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 11:17:49,652 INFO L168 Benchmark]: Toolchain (without parser) took 1928.64 ms. Allocated memory was 140.0 MB in the beginning and 202.9 MB in the end (delta: 62.9 MB). Free memory was 103.2 MB in the beginning and 95.4 MB in the end (delta: 7.9 MB). Peak memory consumption was 70.8 MB. Max. memory is 7.1 GB. [2020-08-18 11:17:49,653 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-18 11:17:49,654 INFO L168 Benchmark]: CACSL2BoogieTranslator took 410.67 ms. Allocated memory was 140.0 MB in the beginning and 202.9 MB in the end (delta: 62.9 MB). Free memory was 103.0 MB in the beginning and 179.6 MB in the end (delta: -76.6 MB). Peak memory consumption was 22.9 MB. Max. memory is 7.1 GB. [2020-08-18 11:17:49,655 INFO L168 Benchmark]: Boogie Preprocessor took 60.94 ms. Allocated memory is still 202.9 MB. Free memory was 179.6 MB in the beginning and 177.0 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. [2020-08-18 11:17:49,656 INFO L168 Benchmark]: RCFGBuilder took 557.67 ms. Allocated memory is still 202.9 MB. Free memory was 177.0 MB in the beginning and 148.9 MB in the end (delta: 28.1 MB). Peak memory consumption was 28.1 MB. Max. memory is 7.1 GB. [2020-08-18 11:17:49,657 INFO L168 Benchmark]: TraceAbstraction took 892.60 ms. Allocated memory is still 202.9 MB. Free memory was 148.2 MB in the beginning and 95.4 MB in the end (delta: 52.9 MB). Peak memory consumption was 52.9 MB. Max. memory is 7.1 GB. [2020-08-18 11:17:49,661 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 410.67 ms. Allocated memory was 140.0 MB in the beginning and 202.9 MB in the end (delta: 62.9 MB). Free memory was 103.0 MB in the beginning and 179.6 MB in the end (delta: -76.6 MB). Peak memory consumption was 22.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 60.94 ms. Allocated memory is still 202.9 MB. Free memory was 179.6 MB in the beginning and 177.0 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 557.67 ms. Allocated memory is still 202.9 MB. Free memory was 177.0 MB in the beginning and 148.9 MB in the end (delta: 28.1 MB). Peak memory consumption was 28.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 892.60 ms. Allocated memory is still 202.9 MB. Free memory was 148.2 MB in the beginning and 95.4 MB in the end (delta: 52.9 MB). Peak memory consumption was 52.9 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...