/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.8 -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 [2020-08-19 01:55:06,618 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-19 01:55:06,621 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-19 01:55:06,661 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-19 01:55:06,661 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-19 01:55:06,670 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-19 01:55:06,673 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-19 01:55:06,677 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-19 01:55:06,679 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-19 01:55:06,682 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-19 01:55:06,683 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-19 01:55:06,684 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-19 01:55:06,684 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 01:55:06,687 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 01:55:06,690 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 01:55:06,691 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 01:55:06,693 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 01:55:06,694 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 01:55:06,695 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 01:55:06,703 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 01:55:06,705 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 01:55:06,706 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 01:55:06,707 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 01:55:06,708 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 01:55:06,720 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-19 01:55:06,720 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-19 01:55:06,720 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-19 01:55:06,726 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-19 01:55:06,727 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-19 01:55:06,728 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-19 01:55:06,728 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-19 01:55:06,728 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-19 01:55:06,732 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-19 01:55:06,732 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-19 01:55:06,733 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-19 01:55:06,733 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-19 01:55:06,737 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-19 01:55:06,738 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-19 01:55:06,738 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 01:55:06,739 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 01:55:06,739 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 01:55:06,740 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 [2020-08-19 01:55:06,778 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 01:55:06,778 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 01:55:06,780 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 01:55:06,780 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 01:55:06,780 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 01:55:06,781 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 01:55:06,781 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 01:55:06,781 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 01:55:06,781 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 01:55:06,782 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 01:55:06,783 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 01:55:06,783 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 01:55:06,783 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 01:55:06,784 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 01:55:06,784 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 01:55:06,784 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 01:55:06,784 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 01:55:06,784 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 01:55:06,784 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 01:55:06,785 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 01:55:06,785 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 01:55:06,785 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 01:55:06,786 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 01:55:06,786 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 01:55:06,786 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 01:55:06,786 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 01:55:06,786 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 01:55:06,787 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 01:55:06,787 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 01:55:06,787 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=WIDESTAMONGSMALL;tolerance=0.8; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8; [2020-08-19 01:55:07,128 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 01:55:07,143 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 01:55:07,148 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 01:55:07,150 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 01:55:07,150 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 01:55:07,151 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1130a.c [2020-08-19 01:55:07,218 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b689fc34e/ecf03b86ad164c0291844e063a449003/FLAGc23c3ed1b [2020-08-19 01:55:07,689 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 01:55:07,690 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-newlib/float_req_bl_1130a.c [2020-08-19 01:55:07,697 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b689fc34e/ecf03b86ad164c0291844e063a449003/FLAGc23c3ed1b [2020-08-19 01:55:08,036 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b689fc34e/ecf03b86ad164c0291844e063a449003 [2020-08-19 01:55:08,045 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 01:55:08,046 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 01:55:08,047 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 01:55:08,047 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 01:55:08,051 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 01:55:08,052 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 01:55:08" (1/1) ... [2020-08-19 01:55:08,055 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@156d188 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:55:08, skipping insertion in model container [2020-08-19 01:55:08,055 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 01:55:08" (1/1) ... [2020-08-19 01:55:08,062 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 01:55:08,083 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 01:55:08,382 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 01:55:08,391 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 01:55:08,551 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 01:55:08,571 INFO L208 MainTranslator]: Completed translation [2020-08-19 01:55:08,571 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:55:08 WrapperNode [2020-08-19 01:55:08,572 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 01:55:08,572 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 01:55:08,573 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 01:55:08,573 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 01:55:08,585 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:55:08" (1/1) ... [2020-08-19 01:55:08,585 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:55:08" (1/1) ... [2020-08-19 01:55:08,596 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:55:08" (1/1) ... [2020-08-19 01:55:08,596 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:55:08" (1/1) ... [2020-08-19 01:55:08,611 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:55:08" (1/1) ... [2020-08-19 01:55:08,620 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:55:08" (1/1) ... [2020-08-19 01:55:08,623 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:55:08" (1/1) ... [2020-08-19 01:55:08,627 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 01:55:08,628 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 01:55:08,628 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 01:55:08,628 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 01:55:08,629 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:55:08" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 01:55:08,693 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 01:55:08,694 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 01:55:08,694 INFO L138 BoogieDeclarations]: Found implementation of procedure fmod_float [2020-08-19 01:55:08,694 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_float [2020-08-19 01:55:08,694 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 01:55:08,694 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 01:55:08,694 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2020-08-19 01:55:08,695 INFO L130 BoogieDeclarations]: Found specification of procedure fmod_float [2020-08-19 01:55:08,695 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-19 01:55:08,695 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-08-19 01:55:08,695 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-19 01:55:08,695 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-19 01:55:08,695 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-08-19 01:55:08,696 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-19 01:55:08,696 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_float [2020-08-19 01:55:08,696 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 01:55:08,696 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 01:55:08,696 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real [2020-08-19 01:55:08,696 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 01:55:09,173 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 01:55:09,174 INFO L295 CfgBuilder]: Removed 14 assume(true) statements. [2020-08-19 01:55:09,178 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 01:55:09 BoogieIcfgContainer [2020-08-19 01:55:09,181 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 01:55:09,182 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 01:55:09,182 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 01:55:09,189 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 01:55:09,190 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 01:55:08" (1/3) ... [2020-08-19 01:55:09,191 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@419d236b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 01:55:09, skipping insertion in model container [2020-08-19 01:55:09,191 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:55:08" (2/3) ... [2020-08-19 01:55:09,191 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@419d236b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 01:55:09, skipping insertion in model container [2020-08-19 01:55:09,192 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 01:55:09" (3/3) ... [2020-08-19 01:55:09,194 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_1130a.c [2020-08-19 01:55:09,205 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 01:55:09,213 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 01:55:09,226 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 01:55:09,249 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 01:55:09,249 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 01:55:09,250 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 01:55:09,250 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 01:55:09,250 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 01:55:09,250 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 01:55:09,250 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 01:55:09,250 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 01:55:09,269 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states. [2020-08-19 01:55:09,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-19 01:55:09,276 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:55:09,277 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:55:09,277 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:55:09,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:55:09,282 INFO L82 PathProgramCache]: Analyzing trace with hash 1920116781, now seen corresponding path program 1 times [2020-08-19 01:55:09,289 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:55:09,290 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1874898494] [2020-08-19 01:55:09,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:55:09,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:55:09,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:55:09,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:55:09,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-19 01:55:09,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:55:09,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:55:09,550 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1874898494] [2020-08-19 01:55:09,552 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:55:09,553 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-19 01:55:09,554 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433157438] [2020-08-19 01:55:09,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-19 01:55:09,560 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:55:09,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-19 01:55:09,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-19 01:55:09,575 INFO L87 Difference]: Start difference. First operand 61 states. Second operand 4 states. [2020-08-19 01:55:09,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:55:09,832 INFO L93 Difference]: Finished difference Result 116 states and 180 transitions. [2020-08-19 01:55:09,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 01:55:09,834 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-08-19 01:55:09,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:55:09,846 INFO L225 Difference]: With dead ends: 116 [2020-08-19 01:55:09,846 INFO L226 Difference]: Without dead ends: 56 [2020-08-19 01:55:09,851 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 [2020-08-19 01:55:09,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-08-19 01:55:09,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-08-19 01:55:09,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-08-19 01:55:09,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 72 transitions. [2020-08-19 01:55:09,904 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 72 transitions. Word has length 19 [2020-08-19 01:55:09,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:55:09,904 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 72 transitions. [2020-08-19 01:55:09,905 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-19 01:55:09,905 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 72 transitions. [2020-08-19 01:55:09,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-19 01:55:09,906 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:55:09,906 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] [2020-08-19 01:55:09,907 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 01:55:09,907 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:55:09,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:55:09,908 INFO L82 PathProgramCache]: Analyzing trace with hash -2095475350, now seen corresponding path program 1 times [2020-08-19 01:55:09,908 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:55:09,908 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1991478005] [2020-08-19 01:55:09,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:55:09,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-19 01:55:10,009 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-19 01:55:10,009 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-19 01:55:10,014 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 01:55:10,033 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.08 01:55:10 BoogieIcfgContainer [2020-08-19 01:55:10,033 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-19 01:55:10,036 INFO L168 Benchmark]: Toolchain (without parser) took 1988.59 ms. Allocated memory was 149.9 MB in the beginning and 233.3 MB in the end (delta: 83.4 MB). Free memory was 104.7 MB in the beginning and 201.6 MB in the end (delta: -97.0 MB). Peak memory consumption was 71.3 MB. Max. memory is 7.1 GB. [2020-08-19 01:55:10,036 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 149.9 MB. Free memory was 123.2 MB in the beginning and 123.0 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-19 01:55:10,038 INFO L168 Benchmark]: CACSL2BoogieTranslator took 525.04 ms. Allocated memory was 149.9 MB in the beginning and 204.5 MB in the end (delta: 54.5 MB). Free memory was 104.4 MB in the beginning and 180.7 MB in the end (delta: -76.3 MB). Peak memory consumption was 20.0 MB. Max. memory is 7.1 GB. [2020-08-19 01:55:10,038 INFO L168 Benchmark]: Boogie Preprocessor took 54.89 ms. Allocated memory is still 204.5 MB. Free memory was 180.7 MB in the beginning and 178.3 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. [2020-08-19 01:55:10,039 INFO L168 Benchmark]: RCFGBuilder took 553.40 ms. Allocated memory is still 204.5 MB. Free memory was 178.3 MB in the beginning and 149.7 MB in the end (delta: 28.6 MB). Peak memory consumption was 28.6 MB. Max. memory is 7.1 GB. [2020-08-19 01:55:10,041 INFO L168 Benchmark]: TraceAbstraction took 850.72 ms. Allocated memory was 204.5 MB in the beginning and 233.3 MB in the end (delta: 28.8 MB). Free memory was 149.1 MB in the beginning and 201.6 MB in the end (delta: -52.5 MB). Peak memory consumption was 61.2 MB. Max. memory is 7.1 GB. [2020-08-19 01:55:10,045 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 149.9 MB. Free memory was 123.2 MB in the beginning and 123.0 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 525.04 ms. Allocated memory was 149.9 MB in the beginning and 204.5 MB in the end (delta: 54.5 MB). Free memory was 104.4 MB in the beginning and 180.7 MB in the end (delta: -76.3 MB). Peak memory consumption was 20.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 54.89 ms. Allocated memory is still 204.5 MB. Free memory was 180.7 MB in the beginning and 178.3 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 553.40 ms. Allocated memory is still 204.5 MB. Free memory was 178.3 MB in the beginning and 149.7 MB in the end (delta: 28.6 MB). Peak memory consumption was 28.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 850.72 ms. Allocated memory was 204.5 MB in the beginning and 233.3 MB in the end (delta: 28.8 MB). Free memory was 149.1 MB in the beginning and 201.6 MB in the end (delta: -52.5 MB). Peak memory consumption was 61.2 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...