/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_1031.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 21:03:50,243 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 21:03:50,247 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 21:03:50,289 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 21:03:50,289 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 21:03:50,298 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 21:03:50,300 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 21:03:50,304 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 21:03:50,306 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 21:03:50,310 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 21:03:50,310 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 21:03:50,312 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 21:03:50,312 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 21:03:50,315 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 21:03:50,317 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 21:03:50,319 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 21:03:50,321 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 21:03:50,322 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 21:03:50,323 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 21:03:50,331 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 21:03:50,334 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 21:03:50,335 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 21:03:50,336 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 21:03:50,337 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 21:03:50,350 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 21:03:50,355 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 21:03:50,355 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 21:03:50,356 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 21:03:50,360 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 21:03:50,361 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 21:03:50,361 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 21:03:50,362 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 21:03:50,365 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 21:03:50,366 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 21:03:50,367 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 21:03:50,367 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 21:03:50,367 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 21:03:50,368 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 21:03:50,369 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 21:03:50,369 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 21:03:50,370 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 21:03:50,372 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 21:03:50,409 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 21:03:50,409 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 21:03:50,411 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 21:03:50,412 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 21:03:50,412 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 21:03:50,412 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 21:03:50,412 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 21:03:50,412 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 21:03:50,413 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 21:03:50,413 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 21:03:50,414 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 21:03:50,414 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 21:03:50,414 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 21:03:50,415 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 21:03:50,415 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 21:03:50,415 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 21:03:50,415 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 21:03:50,415 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 21:03:50,416 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 21:03:50,416 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 21:03:50,416 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 21:03:50,416 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 21:03:50,416 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 21:03:50,417 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 21:03:50,417 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 21:03:50,417 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 21:03:50,417 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 21:03:50,417 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 21:03:50,418 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 21:03:50,418 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 21:03:50,774 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 21:03:50,793 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 21:03:50,796 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 21:03:50,797 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 21:03:50,798 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 21:03:50,799 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1031.c [2020-08-18 21:03:50,869 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/384ea2d4f/5893c2cde0094a3ebfb9daef95ed7575/FLAG779c7e798 [2020-08-18 21:03:51,332 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 21:03:51,334 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-newlib/float_req_bl_1031.c [2020-08-18 21:03:51,343 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/384ea2d4f/5893c2cde0094a3ebfb9daef95ed7575/FLAG779c7e798 [2020-08-18 21:03:51,366 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/384ea2d4f/5893c2cde0094a3ebfb9daef95ed7575 [2020-08-18 21:03:51,379 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 21:03:51,381 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 21:03:51,385 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 21:03:51,385 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 21:03:51,390 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 21:03:51,392 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 09:03:51" (1/1) ... [2020-08-18 21:03:51,395 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2584cbd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:03:51, skipping insertion in model container [2020-08-18 21:03:51,395 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 09:03:51" (1/1) ... [2020-08-18 21:03:51,405 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 21:03:51,428 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 21:03:51,671 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 21:03:51,674 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 21:03:51,696 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 21:03:51,719 INFO L208 MainTranslator]: Completed translation [2020-08-18 21:03:51,719 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:03:51 WrapperNode [2020-08-18 21:03:51,720 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 21:03:51,720 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 21:03:51,721 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 21:03:51,721 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 21:03:51,815 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:03:51" (1/1) ... [2020-08-18 21:03:51,815 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:03:51" (1/1) ... [2020-08-18 21:03:51,829 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:03:51" (1/1) ... [2020-08-18 21:03:51,829 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:03:51" (1/1) ... [2020-08-18 21:03:51,854 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:03:51" (1/1) ... [2020-08-18 21:03:51,863 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:03:51" (1/1) ... [2020-08-18 21:03:51,871 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:03:51" (1/1) ... [2020-08-18 21:03:51,873 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 21:03:51,876 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 21:03:51,877 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 21:03:51,877 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 21:03:51,878 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:03:51" (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 21:03:51,944 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 21:03:51,944 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 21:03:51,944 INFO L138 BoogieDeclarations]: Found implementation of procedure round_float [2020-08-18 21:03:51,945 INFO L138 BoogieDeclarations]: Found implementation of procedure isnan_float [2020-08-18 21:03:51,945 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 21:03:51,945 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 21:03:51,946 INFO L130 BoogieDeclarations]: Found specification of procedure round_float [2020-08-18 21:03:51,946 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-18 21:03:51,946 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-08-18 21:03:51,946 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-18 21:03:51,947 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 21:03:51,947 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-18 21:03:51,947 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-08-18 21:03:51,947 INFO L130 BoogieDeclarations]: Found specification of procedure isnan_float [2020-08-18 21:03:51,948 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 21:03:51,948 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 21:03:51,949 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 21:03:52,208 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 21:03:52,208 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-08-18 21:03:52,212 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 09:03:52 BoogieIcfgContainer [2020-08-18 21:03:52,212 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 21:03:52,214 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 21:03:52,214 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 21:03:52,217 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 21:03:52,217 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 09:03:51" (1/3) ... [2020-08-18 21:03:52,218 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a98be6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 09:03:52, skipping insertion in model container [2020-08-18 21:03:52,218 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:03:51" (2/3) ... [2020-08-18 21:03:52,219 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a98be6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 09:03:52, skipping insertion in model container [2020-08-18 21:03:52,219 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 09:03:52" (3/3) ... [2020-08-18 21:03:52,221 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_1031.c [2020-08-18 21:03:52,236 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 21:03:52,246 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 21:03:52,266 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 21:03:52,298 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 21:03:52,298 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 21:03:52,298 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 21:03:52,299 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 21:03:52,299 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 21:03:52,299 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 21:03:52,299 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 21:03:52,299 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 21:03:52,321 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2020-08-18 21:03:52,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-18 21:03:52,328 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:03:52,329 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:03:52,330 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:03:52,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:03:52,338 INFO L82 PathProgramCache]: Analyzing trace with hash -1659352855, now seen corresponding path program 1 times [2020-08-18 21:03:52,349 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:03:52,349 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1428707602] [2020-08-18 21:03:52,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:03:52,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:03:52,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:03:52,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:03:52,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 21:03:52,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:03:52,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-18 21:03:52,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:03:52,600 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 21:03:52,601 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1428707602] [2020-08-18 21:03:52,603 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:03:52,604 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 21:03:52,604 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882219494] [2020-08-18 21:03:52,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 21:03:52,609 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:03:52,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 21:03:52,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 21:03:52,622 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 4 states. [2020-08-18 21:03:52,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:03:52,796 INFO L93 Difference]: Finished difference Result 60 states and 78 transitions. [2020-08-18 21:03:52,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 21:03:52,798 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-08-18 21:03:52,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:03:52,810 INFO L225 Difference]: With dead ends: 60 [2020-08-18 21:03:52,811 INFO L226 Difference]: Without dead ends: 30 [2020-08-18 21:03:52,814 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 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 21:03:52,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-18 21:03:52,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-08-18 21:03:52,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-18 21:03:52,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-08-18 21:03:52,857 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 22 [2020-08-18 21:03:52,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:03:52,858 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-08-18 21:03:52,858 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 21:03:52,858 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-08-18 21:03:52,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-18 21:03:52,859 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:03:52,860 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:03:52,860 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 21:03:52,861 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:03:52,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:03:52,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1719916348, now seen corresponding path program 1 times [2020-08-18 21:03:52,862 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:03:52,862 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1773892475] [2020-08-18 21:03:52,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:03:52,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 21:03:52,930 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 21:03:52,930 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 21:03:52,935 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 21:03:52,950 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 09:03:52 BoogieIcfgContainer [2020-08-18 21:03:52,951 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 21:03:52,953 INFO L168 Benchmark]: Toolchain (without parser) took 1571.85 ms. Allocated memory was 138.4 MB in the beginning and 201.3 MB in the end (delta: 62.9 MB). Free memory was 101.2 MB in the beginning and 120.3 MB in the end (delta: -19.1 MB). Peak memory consumption was 43.8 MB. Max. memory is 7.1 GB. [2020-08-18 21:03:52,954 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 138.4 MB. Free memory was 120.0 MB in the beginning and 119.7 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-18 21:03:52,955 INFO L168 Benchmark]: CACSL2BoogieTranslator took 335.03 ms. Allocated memory is still 138.4 MB. Free memory was 101.0 MB in the beginning and 90.1 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. [2020-08-18 21:03:52,956 INFO L168 Benchmark]: Boogie Preprocessor took 155.62 ms. Allocated memory was 138.4 MB in the beginning and 201.3 MB in the end (delta: 62.9 MB). Free memory was 90.1 MB in the beginning and 178.2 MB in the end (delta: -88.0 MB). Peak memory consumption was 12.3 MB. Max. memory is 7.1 GB. [2020-08-18 21:03:52,957 INFO L168 Benchmark]: RCFGBuilder took 336.11 ms. Allocated memory is still 201.3 MB. Free memory was 178.2 MB in the beginning and 160.9 MB in the end (delta: 17.3 MB). Peak memory consumption was 17.3 MB. Max. memory is 7.1 GB. [2020-08-18 21:03:52,958 INFO L168 Benchmark]: TraceAbstraction took 737.12 ms. Allocated memory is still 201.3 MB. Free memory was 160.2 MB in the beginning and 120.3 MB in the end (delta: 39.9 MB). Peak memory consumption was 39.9 MB. Max. memory is 7.1 GB. [2020-08-18 21:03:52,962 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 138.4 MB. Free memory was 120.0 MB in the beginning and 119.7 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 335.03 ms. Allocated memory is still 138.4 MB. Free memory was 101.0 MB in the beginning and 90.1 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 155.62 ms. Allocated memory was 138.4 MB in the beginning and 201.3 MB in the end (delta: 62.9 MB). Free memory was 90.1 MB in the beginning and 178.2 MB in the end (delta: -88.0 MB). Peak memory consumption was 12.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 336.11 ms. Allocated memory is still 201.3 MB. Free memory was 178.2 MB in the beginning and 160.9 MB in the end (delta: 17.3 MB). Peak memory consumption was 17.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 737.12 ms. Allocated memory is still 201.3 MB. Free memory was 160.2 MB in the beginning and 120.3 MB in the end (delta: 39.9 MB). Peak memory consumption was 39.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 70]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 55, overapproximation of someBinaryArithmeticFLOAToperation at line 42, overapproximation of bitwiseAnd at line 22. Possible FailurePath: [L65] float x = 0.0f / 0.0f; [L66] CALL, EXPR round_float(x) [L12] __uint32_t w; [L14] int exponent_less_127; [L17] ieee_float_shape_type gf_u; [L18] gf_u.value = (x) [L19] EXPR gf_u.word [L19] (w) = gf_u.word [L22] exponent_less_127 = (int)((w & 0x7f800000) >> 23) - 127 [L24] COND FALSE !(exponent_less_127 < 23) [L40] COND TRUE exponent_less_127 == 128 [L42] return x + x; [L66] RET, EXPR round_float(x) [L66] float res = round_float(x); [L69] CALL, EXPR isnan_float(res) [L55] return x != x; [L69] RET, EXPR isnan_float(res) [L69] COND TRUE !isnan_float(res) [L70] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 34 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.6s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 33 SDtfs, 29 SDslu, 5 SDs, 0 SdLazy, 35 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=34occurred 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, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 45 NumberOfCodeBlocks, 45 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 21 ConstructedInterpolants, 0 QuantifiedInterpolants, 882 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...