/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 false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/float-newlib/float_req_bl_0730c.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 13:16:16,202 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 13:16:16,204 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 13:16:16,227 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 13:16:16,228 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 13:16:16,229 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 13:16:16,230 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 13:16:16,232 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 13:16:16,233 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 13:16:16,234 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 13:16:16,235 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 13:16:16,236 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 13:16:16,237 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 13:16:16,238 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 13:16:16,239 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 13:16:16,240 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 13:16:16,241 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 13:16:16,242 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 13:16:16,243 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 13:16:16,245 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 13:16:16,247 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 13:16:16,248 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 13:16:16,249 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 13:16:16,250 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 13:16:16,252 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 13:16:16,253 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 13:16:16,253 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 13:16:16,254 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 13:16:16,254 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 13:16:16,255 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 13:16:16,255 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 13:16:16,258 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 13:16:16,259 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 13:16:16,260 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 13:16:16,263 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 13:16:16,263 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 13:16:16,264 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 13:16:16,265 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 13:16:16,265 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 13:16:16,266 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 13:16:16,266 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 13:16:16,273 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 [2020-08-21 13:16:16,312 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 13:16:16,312 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 13:16:16,314 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 13:16:16,315 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 13:16:16,315 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 13:16:16,315 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 13:16:16,315 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 13:16:16,316 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 13:16:16,316 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 13:16:16,316 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 13:16:16,317 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 13:16:16,317 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 13:16:16,317 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 13:16:16,318 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 13:16:16,319 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 13:16:16,319 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 13:16:16,319 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 13:16:16,320 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 13:16:16,320 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 13:16:16,320 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 13:16:16,320 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 13:16:16,320 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 13:16:16,321 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 13:16:16,321 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 13:16:16,321 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 13:16:16,321 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 13:16:16,322 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 13:16:16,322 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 13:16:16,322 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 13:16:16,322 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 -> false [2020-08-21 13:16:16,617 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 13:16:16,629 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 13:16:16,633 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 13:16:16,634 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 13:16:16,635 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 13:16:16,636 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_0730c.c [2020-08-21 13:16:16,695 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/83f82d547/3ccf317e80554fd3a3550da5d6c8d447/FLAGe285f913f [2020-08-21 13:16:17,193 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 13:16:17,194 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-newlib/float_req_bl_0730c.c [2020-08-21 13:16:17,205 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/83f82d547/3ccf317e80554fd3a3550da5d6c8d447/FLAGe285f913f [2020-08-21 13:16:17,618 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/83f82d547/3ccf317e80554fd3a3550da5d6c8d447 [2020-08-21 13:16:17,625 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 13:16:17,627 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 13:16:17,628 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 13:16:17,628 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 13:16:17,632 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 13:16:17,633 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 01:16:17" (1/1) ... [2020-08-21 13:16:17,636 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4df7be5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:16:17, skipping insertion in model container [2020-08-21 13:16:17,636 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 01:16:17" (1/1) ... [2020-08-21 13:16:17,644 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 13:16:17,665 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 13:16:17,865 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 13:16:17,869 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 13:16:17,901 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 13:16:18,021 INFO L208 MainTranslator]: Completed translation [2020-08-21 13:16:18,021 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:16:18 WrapperNode [2020-08-21 13:16:18,021 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 13:16:18,022 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 13:16:18,022 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 13:16:18,022 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 13:16:18,033 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:16:18" (1/1) ... [2020-08-21 13:16:18,033 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:16:18" (1/1) ... [2020-08-21 13:16:18,043 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:16:18" (1/1) ... [2020-08-21 13:16:18,043 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:16:18" (1/1) ... [2020-08-21 13:16:18,056 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:16:18" (1/1) ... [2020-08-21 13:16:18,062 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:16:18" (1/1) ... [2020-08-21 13:16:18,065 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:16:18" (1/1) ... [2020-08-21 13:16:18,068 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 13:16:18,068 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 13:16:18,069 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 13:16:18,069 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 13:16:18,070 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:16:18" (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 [2020-08-21 13:16:18,144 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 13:16:18,144 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 13:16:18,144 INFO L138 BoogieDeclarations]: Found implementation of procedure __ieee754_sqrtf [2020-08-21 13:16:18,145 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_float [2020-08-21 13:16:18,145 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 13:16:18,145 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 13:16:18,145 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2020-08-21 13:16:18,145 INFO L130 BoogieDeclarations]: Found specification of procedure __ieee754_sqrtf [2020-08-21 13:16:18,145 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-21 13:16:18,146 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-08-21 13:16:18,146 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-21 13:16:18,146 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 13:16:18,146 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-21 13:16:18,146 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-08-21 13:16:18,146 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_float [2020-08-21 13:16:18,147 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 13:16:18,147 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 13:16:18,147 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 13:16:18,548 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 13:16:18,548 INFO L295 CfgBuilder]: Removed 8 assume(true) statements. [2020-08-21 13:16:18,552 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 01:16:18 BoogieIcfgContainer [2020-08-21 13:16:18,553 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 13:16:18,554 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 13:16:18,554 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 13:16:18,557 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 13:16:18,557 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 01:16:17" (1/3) ... [2020-08-21 13:16:18,558 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66332d8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 01:16:18, skipping insertion in model container [2020-08-21 13:16:18,558 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:16:18" (2/3) ... [2020-08-21 13:16:18,558 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66332d8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 01:16:18, skipping insertion in model container [2020-08-21 13:16:18,559 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 01:16:18" (3/3) ... [2020-08-21 13:16:18,560 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_0730c.c [2020-08-21 13:16:18,570 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 13:16:18,578 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 13:16:18,590 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 13:16:18,612 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 13:16:18,612 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 13:16:18,612 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 13:16:18,612 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 13:16:18,613 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 13:16:18,613 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 13:16:18,613 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 13:16:18,613 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 13:16:18,629 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states. [2020-08-21 13:16:18,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-21 13:16:18,635 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:16:18,636 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:16:18,636 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:16:18,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:16:18,641 INFO L82 PathProgramCache]: Analyzing trace with hash 380065484, now seen corresponding path program 1 times [2020-08-21 13:16:18,648 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:16:18,648 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [875936472] [2020-08-21 13:16:18,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:16:18,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:16:18,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:16:18,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:16:18,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 13:16:18,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:16:18,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:16:18,849 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [875936472] [2020-08-21 13:16:18,851 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:16:18,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 13:16:18,853 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529603339] [2020-08-21 13:16:18,858 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 13:16:18,859 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:16:18,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 13:16:18,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 13:16:18,876 INFO L87 Difference]: Start difference. First operand 50 states. Second operand 4 states. [2020-08-21 13:16:19,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:16:19,129 INFO L93 Difference]: Finished difference Result 92 states and 133 transitions. [2020-08-21 13:16:19,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-21 13:16:19,131 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-08-21 13:16:19,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:16:19,141 INFO L225 Difference]: With dead ends: 92 [2020-08-21 13:16:19,142 INFO L226 Difference]: Without dead ends: 46 [2020-08-21 13:16:19,148 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 [2020-08-21 13:16:19,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-21 13:16:19,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-08-21 13:16:19,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-08-21 13:16:19,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 57 transitions. [2020-08-21 13:16:19,196 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 57 transitions. Word has length 17 [2020-08-21 13:16:19,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:16:19,197 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 57 transitions. [2020-08-21 13:16:19,197 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 13:16:19,197 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 57 transitions. [2020-08-21 13:16:19,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-21 13:16:19,198 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:16:19,199 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:16:19,199 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 13:16:19,199 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:16:19,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:16:19,200 INFO L82 PathProgramCache]: Analyzing trace with hash 2048303218, now seen corresponding path program 1 times [2020-08-21 13:16:19,200 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:16:19,201 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2116557083] [2020-08-21 13:16:19,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:16:19,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 13:16:19,267 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 13:16:19,268 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 13:16:19,272 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 13:16:19,289 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 01:16:19 BoogieIcfgContainer [2020-08-21 13:16:19,289 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 13:16:19,292 INFO L168 Benchmark]: Toolchain (without parser) took 1663.93 ms. Allocated memory was 147.8 MB in the beginning and 203.4 MB in the end (delta: 55.6 MB). Free memory was 103.6 MB in the beginning and 107.7 MB in the end (delta: -4.1 MB). Peak memory consumption was 51.5 MB. Max. memory is 7.1 GB. [2020-08-21 13:16:19,293 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 147.8 MB. Free memory was 122.4 MB in the beginning and 122.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-21 13:16:19,294 INFO L168 Benchmark]: CACSL2BoogieTranslator took 393.86 ms. Allocated memory was 147.8 MB in the beginning and 203.4 MB in the end (delta: 55.6 MB). Free memory was 103.4 MB in the beginning and 182.2 MB in the end (delta: -78.9 MB). Peak memory consumption was 21.2 MB. Max. memory is 7.1 GB. [2020-08-21 13:16:19,295 INFO L168 Benchmark]: Boogie Preprocessor took 45.99 ms. Allocated memory is still 203.4 MB. Free memory was 182.2 MB in the beginning and 179.9 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. [2020-08-21 13:16:19,296 INFO L168 Benchmark]: RCFGBuilder took 484.39 ms. Allocated memory is still 203.4 MB. Free memory was 179.2 MB in the beginning and 156.2 MB in the end (delta: 23.0 MB). Peak memory consumption was 23.0 MB. Max. memory is 7.1 GB. [2020-08-21 13:16:19,297 INFO L168 Benchmark]: TraceAbstraction took 735.20 ms. Allocated memory is still 203.4 MB. Free memory was 156.2 MB in the beginning and 107.7 MB in the end (delta: 48.5 MB). Peak memory consumption was 48.5 MB. Max. memory is 7.1 GB. [2020-08-21 13:16:19,301 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 147.8 MB. Free memory was 122.4 MB in the beginning and 122.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 393.86 ms. Allocated memory was 147.8 MB in the beginning and 203.4 MB in the end (delta: 55.6 MB). Free memory was 103.4 MB in the beginning and 182.2 MB in the end (delta: -78.9 MB). Peak memory consumption was 21.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 45.99 ms. Allocated memory is still 203.4 MB. Free memory was 182.2 MB in the beginning and 179.9 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 484.39 ms. Allocated memory is still 203.4 MB. Free memory was 179.2 MB in the beginning and 156.2 MB in the end (delta: 23.0 MB). Peak memory consumption was 23.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 735.20 ms. Allocated memory is still 203.4 MB. Free memory was 156.2 MB in the beginning and 107.7 MB in the end (delta: 48.5 MB). Peak memory consumption was 48.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 106]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 105, overapproximation of bitwiseAnd at line 24, overapproximation of someUnaryFLOAToperation at line 101, overapproximation of someBinaryArithmeticFLOAToperation at line 27. Possible FailurePath: [L12] static const float one_sqrt = 1.0, tiny_sqrt = 1.0e-30; [L101] float x = -0.0f; [L102] CALL, EXPR __ieee754_sqrtf(x) [L15] float z; [L16] __uint32_t r, hx; [L17] __int32_t ix, s, q, m, t, i; [L20] ieee_float_shape_type gf_u; [L21] gf_u.value = (x) [L22] EXPR gf_u.word [L22] (ix) = gf_u.word [L24] hx = ix & 0x7fffffff [L26] COND TRUE !((hx) < 0x7f800000L) [L27] return x * x + x; [L102] RET, EXPR __ieee754_sqrtf(x) [L102] float res = __ieee754_sqrtf(x); [L105] EXPR res == -0.0f && __signbit_float(res) == 1 [L105] COND TRUE !(res == -0.0f && __signbit_float(res) == 1) [L106] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 50 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: 55 SDtfs, 50 SDslu, 5 SDs, 0 SdLazy, 60 SolverSat, 11 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=50occurred 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, 35 NumberOfCodeBlocks, 35 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 16 ConstructedInterpolants, 0 QuantifiedInterpolants, 688 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...