/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 --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/float-newlib/float_req_bl_1052c.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 14:54:05,487 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 14:54:05,491 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 14:54:05,518 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 14:54:05,519 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 14:54:05,520 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 14:54:05,522 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 14:54:05,524 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 14:54:05,526 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 14:54:05,527 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 14:54:05,528 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 14:54:05,529 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 14:54:05,530 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 14:54:05,531 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 14:54:05,532 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 14:54:05,534 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 14:54:05,535 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 14:54:05,536 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 14:54:05,538 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 14:54:05,540 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 14:54:05,541 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 14:54:05,543 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 14:54:05,544 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 14:54:05,545 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 14:54:05,548 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 14:54:05,548 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 14:54:05,549 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 14:54:05,550 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 14:54:05,550 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 14:54:05,552 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 14:54:05,552 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 14:54:05,553 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 14:54:05,554 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 14:54:05,555 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 14:54:05,556 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 14:54:05,557 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 14:54:05,558 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 14:54:05,558 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 14:54:05,558 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 14:54:05,559 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 14:54:05,561 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 14:54:05,562 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 [2020-09-24 14:54:05,589 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 14:54:05,589 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 14:54:05,591 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 14:54:05,591 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 14:54:05,591 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 14:54:05,591 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 14:54:05,592 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 14:54:05,592 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 14:54:05,592 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 14:54:05,592 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 14:54:05,593 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 14:54:05,593 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 14:54:05,593 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 14:54:05,593 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 14:54:05,593 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 14:54:05,594 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 14:54:05,594 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 14:54:05,594 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 14:54:05,594 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 14:54:05,594 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 14:54:05,595 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 14:54:05,595 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 14:54:05,595 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 14:54:05,595 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 14:54:05,596 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 14:54:05,596 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 14:54:05,596 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 14:54:05,596 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 14:54:05,596 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 14:54:05,597 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.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> false [2020-09-24 14:54:06,110 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 14:54:06,136 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 14:54:06,142 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 14:54:06,144 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 14:54:06,145 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 14:54:06,147 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1052c.c [2020-09-24 14:54:06,240 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9c4884fac/c968d2e6eee44d7289b90bcbc7dec4b4/FLAGf660c578d [2020-09-24 14:54:06,821 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 14:54:06,821 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-newlib/float_req_bl_1052c.c [2020-09-24 14:54:06,831 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9c4884fac/c968d2e6eee44d7289b90bcbc7dec4b4/FLAGf660c578d [2020-09-24 14:54:07,146 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9c4884fac/c968d2e6eee44d7289b90bcbc7dec4b4 [2020-09-24 14:54:07,165 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 14:54:07,173 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 14:54:07,175 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 14:54:07,175 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 14:54:07,179 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 14:54:07,180 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 02:54:07" (1/1) ... [2020-09-24 14:54:07,186 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2869c26e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:54:07, skipping insertion in model container [2020-09-24 14:54:07,186 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 02:54:07" (1/1) ... [2020-09-24 14:54:07,198 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 14:54:07,230 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 14:54:07,469 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 14:54:07,474 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 14:54:07,510 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 14:54:07,537 INFO L208 MainTranslator]: Completed translation [2020-09-24 14:54:07,537 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:54:07 WrapperNode [2020-09-24 14:54:07,537 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 14:54:07,538 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 14:54:07,539 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 14:54:07,539 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 14:54:07,640 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:54:07" (1/1) ... [2020-09-24 14:54:07,642 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:54:07" (1/1) ... [2020-09-24 14:54:07,656 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:54:07" (1/1) ... [2020-09-24 14:54:07,656 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:54:07" (1/1) ... [2020-09-24 14:54:07,668 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:54:07" (1/1) ... [2020-09-24 14:54:07,675 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:54:07" (1/1) ... [2020-09-24 14:54:07,678 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:54:07" (1/1) ... [2020-09-24 14:54:07,681 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 14:54:07,682 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 14:54:07,682 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 14:54:07,682 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 14:54:07,683 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:54:07" (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 [2020-09-24 14:54:07,760 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 14:54:07,760 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 14:54:07,760 INFO L138 BoogieDeclarations]: Found implementation of procedure floor_float [2020-09-24 14:54:07,760 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_float [2020-09-24 14:54:07,761 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 14:54:07,761 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 14:54:07,761 INFO L130 BoogieDeclarations]: Found specification of procedure floor_float [2020-09-24 14:54:07,761 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-24 14:54:07,761 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-09-24 14:54:07,762 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-24 14:54:07,762 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-24 14:54:07,762 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-24 14:54:07,762 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-09-24 14:54:07,762 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_float [2020-09-24 14:54:07,763 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 14:54:07,763 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 14:54:07,763 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 14:54:08,242 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 14:54:08,243 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-09-24 14:54:08,248 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 02:54:08 BoogieIcfgContainer [2020-09-24 14:54:08,249 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 14:54:08,250 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 14:54:08,250 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 14:54:08,254 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 14:54:08,254 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 02:54:07" (1/3) ... [2020-09-24 14:54:08,255 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b90fe40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 02:54:08, skipping insertion in model container [2020-09-24 14:54:08,255 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:54:07" (2/3) ... [2020-09-24 14:54:08,256 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b90fe40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 02:54:08, skipping insertion in model container [2020-09-24 14:54:08,256 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 02:54:08" (3/3) ... [2020-09-24 14:54:08,258 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_1052c.c [2020-09-24 14:54:08,269 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 14:54:08,282 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 14:54:08,304 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 14:54:08,333 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 14:54:08,333 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 14:54:08,333 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 14:54:08,333 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 14:54:08,334 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 14:54:08,334 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 14:54:08,334 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 14:54:08,334 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 14:54:08,357 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states. [2020-09-24 14:54:08,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-24 14:54:08,366 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:08,367 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:54:08,368 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:08,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:08,376 INFO L82 PathProgramCache]: Analyzing trace with hash 1112958377, now seen corresponding path program 1 times [2020-09-24 14:54:08,386 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:08,386 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1077456955] [2020-09-24 14:54:08,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:08,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:08,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:08,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:08,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-24 14:54:08,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:08,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 14:54:08,657 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1077456955] [2020-09-24 14:54:08,660 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 14:54:08,660 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 14:54:08,661 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311015299] [2020-09-24 14:54:08,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 14:54:08,668 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:08,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 14:54:08,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 14:54:08,689 INFO L87 Difference]: Start difference. First operand 92 states. Second operand 4 states. [2020-09-24 14:54:08,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:08,974 INFO L93 Difference]: Finished difference Result 168 states and 201 transitions. [2020-09-24 14:54:08,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 14:54:08,977 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2020-09-24 14:54:08,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:08,991 INFO L225 Difference]: With dead ends: 168 [2020-09-24 14:54:08,992 INFO L226 Difference]: Without dead ends: 84 [2020-09-24 14:54:08,997 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 [2020-09-24 14:54:09,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-09-24 14:54:09,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2020-09-24 14:54:09,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-09-24 14:54:09,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 93 transitions. [2020-09-24 14:54:09,060 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 93 transitions. Word has length 31 [2020-09-24 14:54:09,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:09,061 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 93 transitions. [2020-09-24 14:54:09,061 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 14:54:09,061 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 93 transitions. [2020-09-24 14:54:09,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-09-24 14:54:09,063 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:09,064 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:54:09,064 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 14:54:09,064 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:09,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:09,065 INFO L82 PathProgramCache]: Analyzing trace with hash 788175425, now seen corresponding path program 1 times [2020-09-24 14:54:09,066 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:09,066 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1895247464] [2020-09-24 14:54:09,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:09,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-24 14:54:09,145 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-24 14:54:09,145 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-24 14:54:09,151 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 14:54:09,172 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 02:54:09 BoogieIcfgContainer [2020-09-24 14:54:09,172 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 14:54:09,177 INFO L168 Benchmark]: Toolchain (without parser) took 2006.70 ms. Allocated memory was 137.9 MB in the beginning and 200.8 MB in the end (delta: 62.9 MB). Free memory was 100.6 MB in the beginning and 99.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 64.5 MB. Max. memory is 7.1 GB. [2020-09-24 14:54:09,178 INFO L168 Benchmark]: CDTParser took 0.48 ms. Allocated memory is still 137.9 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-24 14:54:09,179 INFO L168 Benchmark]: CACSL2BoogieTranslator took 363.47 ms. Allocated memory is still 137.9 MB. Free memory was 100.0 MB in the beginning and 88.8 MB in the end (delta: 11.2 MB). Peak memory consumption was 11.2 MB. Max. memory is 7.1 GB. [2020-09-24 14:54:09,180 INFO L168 Benchmark]: Boogie Preprocessor took 142.89 ms. Allocated memory was 137.9 MB in the beginning and 200.8 MB in the end (delta: 62.9 MB). Free memory was 88.8 MB in the beginning and 178.0 MB in the end (delta: -89.2 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. [2020-09-24 14:54:09,181 INFO L168 Benchmark]: RCFGBuilder took 567.28 ms. Allocated memory is still 200.8 MB. Free memory was 178.0 MB in the beginning and 153.4 MB in the end (delta: 24.5 MB). Peak memory consumption was 24.5 MB. Max. memory is 7.1 GB. [2020-09-24 14:54:09,182 INFO L168 Benchmark]: TraceAbstraction took 922.37 ms. Allocated memory is still 200.8 MB. Free memory was 152.7 MB in the beginning and 99.1 MB in the end (delta: 53.7 MB). Peak memory consumption was 53.7 MB. Max. memory is 7.1 GB. [2020-09-24 14:54:09,186 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.48 ms. Allocated memory is still 137.9 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 363.47 ms. Allocated memory is still 137.9 MB. Free memory was 100.0 MB in the beginning and 88.8 MB in the end (delta: 11.2 MB). Peak memory consumption was 11.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 142.89 ms. Allocated memory was 137.9 MB in the beginning and 200.8 MB in the end (delta: 62.9 MB). Free memory was 88.8 MB in the beginning and 178.0 MB in the end (delta: -89.2 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 567.28 ms. Allocated memory is still 200.8 MB. Free memory was 178.0 MB in the beginning and 153.4 MB in the end (delta: 24.5 MB). Peak memory consumption was 24.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 922.37 ms. Allocated memory is still 200.8 MB. Free memory was 152.7 MB in the beginning and 99.1 MB in the end (delta: 53.7 MB). Peak memory consumption was 53.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 80]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 79, overapproximation of bitwiseAnd at line 21, overapproximation of someUnaryFLOAToperation at line 75, overapproximation of someBinaryArithmeticFLOAToperation at line 44. Possible FailurePath: [L11] static const float huge_floor = 1.0e30; [L75] float x = -0.0f; [L76] CALL, EXPR floor_float(x) [L14] __int32_t i0, j0; [L15] __uint32_t i, ix; [L17] ieee_float_shape_type gf_u; [L18] gf_u.value = (x) [L19] EXPR gf_u.word [L19] (i0) = gf_u.word [L21] ix = (i0 & 0x7fffffff) [L22] j0 = (ix >> 23) - 0x7f [L23] COND FALSE !(j0 < 23) [L43] COND TRUE !((ix) < 0x7f800000L) [L44] return x + x; [L76] RET, EXPR floor_float(x) [L76] float res = floor_float(x); [L79] EXPR res == -0.0f && __signbit_float(res) == 1 [L79] COND TRUE !(res == -0.0f && __signbit_float(res) == 1) [L80] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 92 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.8s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 97 SDtfs, 17 SDslu, 73 SDs, 0 SdLazy, 105 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=92occurred 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, 71 NumberOfCodeBlocks, 71 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 30 ConstructedInterpolants, 0 QuantifiedInterpolants, 1620 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...