/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=DEEPEST -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 21:03:58,520 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 21:03:58,523 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 21:03:58,563 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 21:03:58,564 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 21:03:58,572 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 21:03:58,574 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 21:03:58,578 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 21:03:58,580 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 21:03:58,583 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 21:03:58,584 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 21:03:58,585 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 21:03:58,585 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 21:03:58,589 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 21:03:58,591 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 21:03:58,592 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 21:03:58,594 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 21:03:58,595 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 21:03:58,596 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 21:03:58,604 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 21:03:58,606 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 21:03:58,607 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 21:03:58,608 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 21:03:58,609 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 21:03:58,620 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 21:03:58,621 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 21:03:58,621 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 21:03:58,627 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 21:03:58,628 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 21:03:58,628 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 21:03:58,629 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 21:03:58,629 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 21:03:58,633 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 21:03:58,634 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 21:03:58,635 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 21:03:58,635 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 21:03:58,636 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 21:03:58,636 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 21:03:58,636 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 21:03:58,637 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 21:03:58,638 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 21:03:58,638 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 21:03:58,660 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 21:03:58,660 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 21:03:58,661 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 21:03:58,662 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 21:03:58,662 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 21:03:58,662 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 21:03:58,662 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 21:03:58,663 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 21:03:58,663 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 21:03:58,663 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 21:03:58,663 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 21:03:58,663 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 21:03:58,663 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 21:03:58,664 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 21:03:58,664 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 21:03:58,664 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 21:03:58,664 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 21:03:58,664 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 21:03:58,665 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 21:03:58,665 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 21:03:58,665 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 21:03:58,665 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 21:03:58,666 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 21:03:58,666 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 21:03:58,666 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 21:03:58,666 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 21:03:58,666 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 21:03:58,667 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 21:03:58,667 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 21:03:58,667 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=DEEPEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=DEEPEST; [2020-08-18 21:03:58,959 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 21:03:58,972 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 21:03:58,975 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 21:03:58,977 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 21:03:58,977 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 21:03:58,978 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1130a.c [2020-08-18 21:03:59,041 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/edac56f6c/fd95144f145244028f6b62ca727d41de/FLAG58df394c8 [2020-08-18 21:03:59,511 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 21:03:59,511 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-newlib/float_req_bl_1130a.c [2020-08-18 21:03:59,519 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/edac56f6c/fd95144f145244028f6b62ca727d41de/FLAG58df394c8 [2020-08-18 21:03:59,879 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/edac56f6c/fd95144f145244028f6b62ca727d41de [2020-08-18 21:03:59,889 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 21:03:59,891 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 21:03:59,892 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 21:03:59,892 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 21:03:59,896 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 21:03:59,897 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 09:03:59" (1/1) ... [2020-08-18 21:03:59,900 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16febf07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:03:59, skipping insertion in model container [2020-08-18 21:03:59,901 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 09:03:59" (1/1) ... [2020-08-18 21:03:59,909 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 21:03:59,942 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 21:04:00,296 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 21:04:00,305 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 21:04:00,470 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 21:04:00,493 INFO L208 MainTranslator]: Completed translation [2020-08-18 21:04:00,494 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:04:00 WrapperNode [2020-08-18 21:04:00,494 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 21:04:00,495 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 21:04:00,495 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 21:04:00,495 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 21:04:00,508 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:04:00" (1/1) ... [2020-08-18 21:04:00,508 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:04:00" (1/1) ... [2020-08-18 21:04:00,520 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:04:00" (1/1) ... [2020-08-18 21:04:00,520 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:04:00" (1/1) ... [2020-08-18 21:04:00,536 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:04:00" (1/1) ... [2020-08-18 21:04:00,545 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:04:00" (1/1) ... [2020-08-18 21:04:00,547 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:04:00" (1/1) ... [2020-08-18 21:04:00,551 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 21:04:00,552 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 21:04:00,552 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 21:04:00,552 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 21:04:00,553 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:04:00" (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 21:04:00,624 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 21:04:00,624 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 21:04:00,624 INFO L138 BoogieDeclarations]: Found implementation of procedure fmod_float [2020-08-18 21:04:00,624 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_float [2020-08-18 21:04:00,624 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 21:04:00,625 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 21:04:00,625 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2020-08-18 21:04:00,625 INFO L130 BoogieDeclarations]: Found specification of procedure fmod_float [2020-08-18 21:04:00,625 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-18 21:04:00,625 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-08-18 21:04:00,625 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-18 21:04:00,626 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 21:04:00,626 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-08-18 21:04:00,626 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-18 21:04:00,626 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_float [2020-08-18 21:04:00,626 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 21:04:00,626 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 21:04:00,626 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real [2020-08-18 21:04:00,627 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 21:04:01,104 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 21:04:01,105 INFO L295 CfgBuilder]: Removed 14 assume(true) statements. [2020-08-18 21:04:01,109 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 09:04:01 BoogieIcfgContainer [2020-08-18 21:04:01,110 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 21:04:01,111 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 21:04:01,111 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 21:04:01,114 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 21:04:01,114 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 09:03:59" (1/3) ... [2020-08-18 21:04:01,115 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6576942f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 09:04:01, skipping insertion in model container [2020-08-18 21:04:01,116 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:04:00" (2/3) ... [2020-08-18 21:04:01,116 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6576942f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 09:04:01, skipping insertion in model container [2020-08-18 21:04:01,116 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 09:04:01" (3/3) ... [2020-08-18 21:04:01,118 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_1130a.c [2020-08-18 21:04:01,129 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 21:04:01,137 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 21:04:01,151 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 21:04:01,177 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 21:04:01,177 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 21:04:01,177 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 21:04:01,177 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 21:04:01,178 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 21:04:01,178 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 21:04:01,178 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 21:04:01,178 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 21:04:01,202 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states. [2020-08-18 21:04:01,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-18 21:04:01,208 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:04:01,209 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 21:04:01,209 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:04:01,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:04:01,214 INFO L82 PathProgramCache]: Analyzing trace with hash 1920116781, now seen corresponding path program 1 times [2020-08-18 21:04:01,221 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:04:01,222 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [472101415] [2020-08-18 21:04:01,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:04:01,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:01,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:04:01,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:01,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 21:04:01,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:01,479 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 21:04:01,480 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [472101415] [2020-08-18 21:04:01,482 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:04:01,482 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 21:04:01,483 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939749483] [2020-08-18 21:04:01,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 21:04:01,492 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:04:01,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 21:04:01,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 21:04:01,511 INFO L87 Difference]: Start difference. First operand 61 states. Second operand 4 states. [2020-08-18 21:04:01,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:04:01,771 INFO L93 Difference]: Finished difference Result 116 states and 180 transitions. [2020-08-18 21:04:01,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:04:01,773 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-08-18 21:04:01,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:04:01,784 INFO L225 Difference]: With dead ends: 116 [2020-08-18 21:04:01,785 INFO L226 Difference]: Without dead ends: 56 [2020-08-18 21:04:01,789 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 21:04:01,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-08-18 21:04:01,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-08-18 21:04:01,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-08-18 21:04:01,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 72 transitions. [2020-08-18 21:04:01,841 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 72 transitions. Word has length 19 [2020-08-18 21:04:01,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:04:01,842 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 72 transitions. [2020-08-18 21:04:01,842 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 21:04:01,843 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 72 transitions. [2020-08-18 21:04:01,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-18 21:04:01,844 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:04:01,844 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 21:04:01,845 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 21:04:01,845 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:04:01,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:04:01,846 INFO L82 PathProgramCache]: Analyzing trace with hash -2095475350, now seen corresponding path program 1 times [2020-08-18 21:04:01,846 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:04:01,847 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2103021694] [2020-08-18 21:04:01,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:04:01,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 21:04:01,931 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 21:04:01,931 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 21:04:01,935 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 21:04:01,950 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 09:04:01 BoogieIcfgContainer [2020-08-18 21:04:01,950 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 21:04:01,953 INFO L168 Benchmark]: Toolchain (without parser) took 2061.80 ms. Allocated memory was 140.0 MB in the beginning and 205.5 MB in the end (delta: 65.5 MB). Free memory was 102.1 MB in the beginning and 98.3 MB in the end (delta: 3.9 MB). Peak memory consumption was 69.4 MB. Max. memory is 7.1 GB. [2020-08-18 21:04:01,954 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 140.0 MB. Free memory was 120.3 MB in the beginning and 120.1 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-18 21:04:01,956 INFO L168 Benchmark]: CACSL2BoogieTranslator took 602.31 ms. Allocated memory was 140.0 MB in the beginning and 205.5 MB in the end (delta: 65.5 MB). Free memory was 101.9 MB in the beginning and 181.3 MB in the end (delta: -79.4 MB). Peak memory consumption was 22.4 MB. Max. memory is 7.1 GB. [2020-08-18 21:04:01,956 INFO L168 Benchmark]: Boogie Preprocessor took 56.78 ms. Allocated memory is still 205.5 MB. Free memory was 181.3 MB in the beginning and 179.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-08-18 21:04:01,957 INFO L168 Benchmark]: RCFGBuilder took 557.73 ms. Allocated memory is still 205.5 MB. Free memory was 178.7 MB in the beginning and 151.1 MB in the end (delta: 27.6 MB). Peak memory consumption was 27.6 MB. Max. memory is 7.1 GB. [2020-08-18 21:04:01,958 INFO L168 Benchmark]: TraceAbstraction took 839.96 ms. Allocated memory is still 205.5 MB. Free memory was 150.5 MB in the beginning and 98.3 MB in the end (delta: 52.2 MB). Peak memory consumption was 52.2 MB. Max. memory is 7.1 GB. [2020-08-18 21:04:01,962 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 140.0 MB. Free memory was 120.3 MB in the beginning and 120.1 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 602.31 ms. Allocated memory was 140.0 MB in the beginning and 205.5 MB in the end (delta: 65.5 MB). Free memory was 101.9 MB in the beginning and 181.3 MB in the end (delta: -79.4 MB). Peak memory consumption was 22.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 56.78 ms. Allocated memory is still 205.5 MB. Free memory was 181.3 MB in the beginning and 179.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 557.73 ms. Allocated memory is still 205.5 MB. Free memory was 178.7 MB in the beginning and 151.1 MB in the end (delta: 27.6 MB). Peak memory consumption was 27.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 839.96 ms. Allocated memory is still 205.5 MB. Free memory was 150.5 MB in the beginning and 98.3 MB in the end (delta: 52.2 MB). Peak memory consumption was 52.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 135]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 134, overapproximation of someUnaryDOUBLEoperation at line 14, overapproximation of bitwiseAnd at line 30, overapproximation of bitwiseXor at line 31, overapproximation of someBinaryArithmeticFLOAToperation at line 35. Possible FailurePath: [L12-L15] static const float one_fmod = 1.0, Zero_fmod[] = { 0.0, -0.0, }; [L126] float x = 0.0f; [L127] float y = __VERIFIER_nondet_float(); [L129] COND TRUE (y < 0.0f || y > 0.0f) [L131] CALL, EXPR fmod_float(x, y) [L18] __int32_t n, hx, hy, hz, ix, iy, sx, i; [L21] ieee_float_shape_type gf_u; [L22] gf_u.value = (x) [L23] EXPR gf_u.word [L23] (hx) = gf_u.word [L26] ieee_float_shape_type gf_u; [L27] gf_u.value = (y) [L28] EXPR gf_u.word [L28] (hy) = gf_u.word [L30] sx = hx & 0x80000000 [L31] hx ^= sx [L32] hy &= 0x7fffffff [L34] COND TRUE ((hy) == 0) || !((hx) < 0x7f800000L) || ((hy) > 0x7f800000L) [L35] return (x * y) / (x * y); [L131] RET, EXPR fmod_float(x, y) [L131] float res = fmod_float(x, y); [L134] EXPR res == 0.0f && __signbit_float(res) == 0 [L134] COND TRUE !(res == 0.0f && __signbit_float(res) == 0) [L135] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 61 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.7s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 75 SDtfs, 14 SDslu, 61 SDs, 0 SdLazy, 80 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=61occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 40 NumberOfCodeBlocks, 40 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 18 ConstructedInterpolants, 0 QuantifiedInterpolants, 918 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...