/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_1130a.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 10:17:05,379 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 10:17:05,383 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 10:17:05,410 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 10:17:05,410 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 10:17:05,412 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 10:17:05,413 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 10:17:05,415 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 10:17:05,417 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 10:17:05,418 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 10:17:05,420 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 10:17:05,421 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 10:17:05,421 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 10:17:05,423 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 10:17:05,424 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 10:17:05,426 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 10:17:05,427 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 10:17:05,428 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 10:17:05,430 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 10:17:05,432 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 10:17:05,434 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 10:17:05,435 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 10:17:05,437 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 10:17:05,438 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 10:17:05,441 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 10:17:05,441 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 10:17:05,441 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 10:17:05,442 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 10:17:05,443 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 10:17:05,444 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 10:17:05,444 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 10:17:05,445 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 10:17:05,446 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 10:17:05,447 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 10:17:05,449 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 10:17:05,449 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 10:17:05,450 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 10:17:05,450 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 10:17:05,451 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 10:17:05,452 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 10:17:05,453 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 10:17:05,453 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 [2020-09-21 10:17:05,485 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 10:17:05,487 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 10:17:05,490 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 10:17:05,491 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 10:17:05,491 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 10:17:05,491 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 10:17:05,491 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 10:17:05,492 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 10:17:05,492 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 10:17:05,492 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 10:17:05,492 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 10:17:05,492 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 10:17:05,493 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 10:17:05,494 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 10:17:05,494 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 10:17:05,494 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 10:17:05,495 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 10:17:05,495 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 10:17:05,495 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 10:17:05,495 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 10:17:05,495 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 10:17:05,496 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 10:17:05,496 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 10:17:05,497 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 10:17:05,497 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 10:17:05,497 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 10:17:05,497 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 10:17:05,497 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 10:17:05,498 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 10:17:05,498 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 [2020-09-21 10:17:05,993 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 10:17:06,018 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 10:17:06,024 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 10:17:06,025 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 10:17:06,026 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 10:17:06,027 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1130a.c [2020-09-21 10:17:06,118 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e55e24f85/dd72b1254fda45b7b6274ab39539b9f0/FLAGa0f33b9c4 [2020-09-21 10:17:06,695 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 10:17:06,696 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-newlib/float_req_bl_1130a.c [2020-09-21 10:17:06,712 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e55e24f85/dd72b1254fda45b7b6274ab39539b9f0/FLAGa0f33b9c4 [2020-09-21 10:17:07,014 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e55e24f85/dd72b1254fda45b7b6274ab39539b9f0 [2020-09-21 10:17:07,030 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 10:17:07,036 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 10:17:07,037 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 10:17:07,038 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 10:17:07,042 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 10:17:07,043 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:17:07" (1/1) ... [2020-09-21 10:17:07,047 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ddfdde2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:17:07, skipping insertion in model container [2020-09-21 10:17:07,048 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:17:07" (1/1) ... [2020-09-21 10:17:07,057 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 10:17:07,105 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 10:17:07,437 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:17:07,450 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 10:17:07,608 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:17:07,634 INFO L208 MainTranslator]: Completed translation [2020-09-21 10:17:07,635 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:17:07 WrapperNode [2020-09-21 10:17:07,635 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 10:17:07,636 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 10:17:07,636 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 10:17:07,636 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 10:17:07,650 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:17:07" (1/1) ... [2020-09-21 10:17:07,650 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:17:07" (1/1) ... [2020-09-21 10:17:07,663 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:17:07" (1/1) ... [2020-09-21 10:17:07,664 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:17:07" (1/1) ... [2020-09-21 10:17:07,680 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:17:07" (1/1) ... [2020-09-21 10:17:07,691 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:17:07" (1/1) ... [2020-09-21 10:17:07,694 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:17:07" (1/1) ... [2020-09-21 10:17:07,698 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 10:17:07,699 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 10:17:07,699 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 10:17:07,699 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 10:17:07,700 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:17:07" (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 [2020-09-21 10:17:07,782 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 10:17:07,783 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 10:17:07,783 INFO L138 BoogieDeclarations]: Found implementation of procedure fmod_float [2020-09-21 10:17:07,783 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_float [2020-09-21 10:17:07,783 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 10:17:07,783 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 10:17:07,784 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2020-09-21 10:17:07,784 INFO L130 BoogieDeclarations]: Found specification of procedure fmod_float [2020-09-21 10:17:07,784 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-21 10:17:07,784 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-09-21 10:17:07,784 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-21 10:17:07,785 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-21 10:17:07,785 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-09-21 10:17:07,785 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-21 10:17:07,785 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_float [2020-09-21 10:17:07,785 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 10:17:07,786 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 10:17:07,786 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real [2020-09-21 10:17:07,786 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 10:17:08,340 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 10:17:08,341 INFO L295 CfgBuilder]: Removed 14 assume(true) statements. [2020-09-21 10:17:08,346 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:17:08 BoogieIcfgContainer [2020-09-21 10:17:08,346 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 10:17:08,347 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 10:17:08,347 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 10:17:08,351 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 10:17:08,351 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 10:17:07" (1/3) ... [2020-09-21 10:17:08,352 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ed1c3e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:17:08, skipping insertion in model container [2020-09-21 10:17:08,352 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:17:07" (2/3) ... [2020-09-21 10:17:08,353 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ed1c3e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:17:08, skipping insertion in model container [2020-09-21 10:17:08,353 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:17:08" (3/3) ... [2020-09-21 10:17:08,355 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_1130a.c [2020-09-21 10:17:08,365 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 10:17:08,376 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 10:17:08,397 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 10:17:08,425 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 10:17:08,425 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 10:17:08,426 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 10:17:08,426 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 10:17:08,426 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 10:17:08,426 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 10:17:08,426 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 10:17:08,426 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 10:17:08,448 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states. [2020-09-21 10:17:08,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-21 10:17:08,457 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:17:08,458 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:17:08,458 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:17:08,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:17:08,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1920116781, now seen corresponding path program 1 times [2020-09-21 10:17:08,474 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:17:08,474 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2001835519] [2020-09-21 10:17:08,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:17:08,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:08,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:17:08,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:08,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-21 10:17:08,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:08,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:17:08,748 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2001835519] [2020-09-21 10:17:08,750 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:17:08,750 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 10:17:08,751 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682148238] [2020-09-21 10:17:08,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 10:17:08,758 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:17:08,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 10:17:08,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 10:17:08,780 INFO L87 Difference]: Start difference. First operand 61 states. Second operand 4 states. [2020-09-21 10:17:09,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:17:09,062 INFO L93 Difference]: Finished difference Result 116 states and 180 transitions. [2020-09-21 10:17:09,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:17:09,064 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-09-21 10:17:09,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:17:09,079 INFO L225 Difference]: With dead ends: 116 [2020-09-21 10:17:09,079 INFO L226 Difference]: Without dead ends: 56 [2020-09-21 10:17:09,085 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 [2020-09-21 10:17:09,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-09-21 10:17:09,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-09-21 10:17:09,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-21 10:17:09,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 72 transitions. [2020-09-21 10:17:09,146 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 72 transitions. Word has length 19 [2020-09-21 10:17:09,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:17:09,147 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 72 transitions. [2020-09-21 10:17:09,147 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 10:17:09,147 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 72 transitions. [2020-09-21 10:17:09,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-21 10:17:09,149 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:17:09,149 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:17:09,150 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 10:17:09,150 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:17:09,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:17:09,151 INFO L82 PathProgramCache]: Analyzing trace with hash -2095475350, now seen corresponding path program 1 times [2020-09-21 10:17:09,151 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:17:09,151 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [460633479] [2020-09-21 10:17:09,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:17:09,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-21 10:17:09,243 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-21 10:17:09,244 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-21 10:17:09,250 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 10:17:09,272 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 10:17:09 BoogieIcfgContainer [2020-09-21 10:17:09,272 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 10:17:09,276 INFO L168 Benchmark]: Toolchain (without parser) took 2241.99 ms. Allocated memory was 140.5 MB in the beginning and 202.4 MB in the end (delta: 61.9 MB). Free memory was 102.6 MB in the beginning and 94.6 MB in the end (delta: 8.0 MB). Peak memory consumption was 69.8 MB. Max. memory is 7.1 GB. [2020-09-21 10:17:09,277 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 140.5 MB. Free memory was 120.8 MB in the beginning and 120.4 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. [2020-09-21 10:17:09,278 INFO L168 Benchmark]: CACSL2BoogieTranslator took 597.98 ms. Allocated memory was 140.5 MB in the beginning and 202.4 MB in the end (delta: 61.9 MB). Free memory was 101.7 MB in the beginning and 179.0 MB in the end (delta: -77.3 MB). Peak memory consumption was 22.1 MB. Max. memory is 7.1 GB. [2020-09-21 10:17:09,279 INFO L168 Benchmark]: Boogie Preprocessor took 62.51 ms. Allocated memory is still 202.4 MB. Free memory was 179.0 MB in the beginning and 176.2 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 7.1 GB. [2020-09-21 10:17:09,280 INFO L168 Benchmark]: RCFGBuilder took 647.54 ms. Allocated memory is still 202.4 MB. Free memory was 176.2 MB in the beginning and 148.3 MB in the end (delta: 28.0 MB). Peak memory consumption was 28.0 MB. Max. memory is 7.1 GB. [2020-09-21 10:17:09,281 INFO L168 Benchmark]: TraceAbstraction took 924.99 ms. Allocated memory is still 202.4 MB. Free memory was 147.3 MB in the beginning and 94.6 MB in the end (delta: 52.7 MB). Peak memory consumption was 52.7 MB. Max. memory is 7.1 GB. [2020-09-21 10:17:09,285 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 140.5 MB. Free memory was 120.8 MB in the beginning and 120.4 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 597.98 ms. Allocated memory was 140.5 MB in the beginning and 202.4 MB in the end (delta: 61.9 MB). Free memory was 101.7 MB in the beginning and 179.0 MB in the end (delta: -77.3 MB). Peak memory consumption was 22.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 62.51 ms. Allocated memory is still 202.4 MB. Free memory was 179.0 MB in the beginning and 176.2 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 647.54 ms. Allocated memory is still 202.4 MB. Free memory was 176.2 MB in the beginning and 148.3 MB in the end (delta: 28.0 MB). Peak memory consumption was 28.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 924.99 ms. Allocated memory is still 202.4 MB. Free memory was 147.3 MB in the beginning and 94.6 MB in the end (delta: 52.7 MB). Peak memory consumption was 52.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 135]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 134, overapproximation of someUnaryDOUBLEoperation at line 14, overapproximation of bitwiseAnd at line 30, overapproximation of bitwiseXor at line 31, overapproximation of someBinaryArithmeticFLOAToperation at line 35. Possible FailurePath: [L12-L15] static const float one_fmod = 1.0, Zero_fmod[] = { 0.0, -0.0, }; [L126] float x = 0.0f; [L127] float y = __VERIFIER_nondet_float(); [L129] COND TRUE (y < 0.0f || y > 0.0f) [L131] CALL, EXPR fmod_float(x, y) [L18] __int32_t n, hx, hy, hz, ix, iy, sx, i; [L21] ieee_float_shape_type gf_u; [L22] gf_u.value = (x) [L23] EXPR gf_u.word [L23] (hx) = gf_u.word [L26] ieee_float_shape_type gf_u; [L27] gf_u.value = (y) [L28] EXPR gf_u.word [L28] (hy) = gf_u.word [L30] sx = hx & 0x80000000 [L31] hx ^= sx [L32] hy &= 0x7fffffff [L34] COND TRUE ((hy) == 0) || !((hx) < 0x7f800000L) || ((hy) > 0x7f800000L) [L35] return (x * y) / (x * y); [L131] RET, EXPR fmod_float(x, y) [L131] float res = fmod_float(x, y); [L134] EXPR res == 0.0f && __signbit_float(res) == 0 [L134] COND TRUE !(res == 0.0f && __signbit_float(res) == 0) [L135] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 61 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.8s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 75 SDtfs, 14 SDslu, 61 SDs, 0 SdLazy, 80 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=61occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 40 NumberOfCodeBlocks, 40 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 18 ConstructedInterpolants, 0 QuantifiedInterpolants, 918 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...