/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/float-newlib/float_req_bl_1032c.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 20:15:28,252 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 20:15:28,254 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 20:15:28,292 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 20:15:28,292 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 20:15:28,296 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 20:15:28,297 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 20:15:28,300 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 20:15:28,304 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 20:15:28,304 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 20:15:28,305 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 20:15:28,307 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 20:15:28,307 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 20:15:28,308 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 20:15:28,309 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 20:15:28,310 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 20:15:28,311 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 20:15:28,312 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 20:15:28,313 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 20:15:28,315 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 20:15:28,316 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 20:15:28,317 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 20:15:28,318 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 20:15:28,319 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 20:15:28,321 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 20:15:28,322 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 20:15:28,322 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 20:15:28,323 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 20:15:28,323 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 20:15:28,324 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 20:15:28,324 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 20:15:28,325 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 20:15:28,326 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 20:15:28,326 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 20:15:28,327 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 20:15:28,327 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 20:15:28,328 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 20:15:28,328 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 20:15:28,328 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 20:15:28,329 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 20:15:28,330 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 20:15:28,331 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 20:15:28,353 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 20:15:28,353 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 20:15:28,355 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 20:15:28,355 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 20:15:28,355 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 20:15:28,355 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 20:15:28,355 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 20:15:28,356 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 20:15:28,356 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 20:15:28,356 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 20:15:28,356 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 20:15:28,356 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 20:15:28,357 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 20:15:28,357 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 20:15:28,357 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 20:15:28,357 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 20:15:28,357 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 20:15:28,358 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 20:15:28,358 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 20:15:28,358 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 20:15:28,358 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 20:15:28,358 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 20:15:28,359 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 20:15:28,359 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 20:15:28,359 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 20:15:28,359 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 20:15:28,359 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 20:15:28,359 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 20:15:28,360 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 20:15:28,360 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SHALLOWEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SHALLOWEST; [2020-08-18 20:15:28,633 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 20:15:28,645 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 20:15:28,649 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 20:15:28,650 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 20:15:28,650 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 20:15:28,651 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1032c.c [2020-08-18 20:15:28,718 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/156a0e89f/bd66523e241d47f4aaa467e53567375e/FLAGc13eeb8f1 [2020-08-18 20:15:29,164 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 20:15:29,165 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-newlib/float_req_bl_1032c.c [2020-08-18 20:15:29,171 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/156a0e89f/bd66523e241d47f4aaa467e53567375e/FLAGc13eeb8f1 [2020-08-18 20:15:29,511 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/156a0e89f/bd66523e241d47f4aaa467e53567375e [2020-08-18 20:15:29,524 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 20:15:29,526 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 20:15:29,527 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 20:15:29,527 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 20:15:29,530 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 20:15:29,531 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 08:15:29" (1/1) ... [2020-08-18 20:15:29,534 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a1d4b70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:15:29, skipping insertion in model container [2020-08-18 20:15:29,535 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 08:15:29" (1/1) ... [2020-08-18 20:15:29,543 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 20:15:29,564 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 20:15:29,851 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 20:15:29,855 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 20:15:29,905 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 20:15:29,938 INFO L208 MainTranslator]: Completed translation [2020-08-18 20:15:29,938 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:15:29 WrapperNode [2020-08-18 20:15:29,939 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 20:15:29,939 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 20:15:29,940 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 20:15:29,940 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 20:15:30,041 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:15:29" (1/1) ... [2020-08-18 20:15:30,042 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:15:29" (1/1) ... [2020-08-18 20:15:30,052 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:15:29" (1/1) ... [2020-08-18 20:15:30,052 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:15:29" (1/1) ... [2020-08-18 20:15:30,063 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:15:29" (1/1) ... [2020-08-18 20:15:30,068 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:15:29" (1/1) ... [2020-08-18 20:15:30,070 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:15:29" (1/1) ... [2020-08-18 20:15:30,074 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 20:15:30,074 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 20:15:30,074 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 20:15:30,075 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 20:15:30,076 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:15:29" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 20:15:30,145 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 20:15:30,146 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 20:15:30,147 INFO L138 BoogieDeclarations]: Found implementation of procedure round_float [2020-08-18 20:15:30,147 INFO L138 BoogieDeclarations]: Found implementation of procedure isinf_float [2020-08-18 20:15:30,148 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 20:15:30,148 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 20:15:30,148 INFO L130 BoogieDeclarations]: Found specification of procedure round_float [2020-08-18 20:15:30,148 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-18 20:15:30,149 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-08-18 20:15:30,149 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-18 20:15:30,150 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 20:15:30,150 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-18 20:15:30,150 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-08-18 20:15:30,150 INFO L130 BoogieDeclarations]: Found specification of procedure isinf_float [2020-08-18 20:15:30,150 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 20:15:30,150 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 20:15:30,151 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 20:15:30,411 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 20:15:30,411 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-08-18 20:15:30,415 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 08:15:30 BoogieIcfgContainer [2020-08-18 20:15:30,415 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 20:15:30,416 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 20:15:30,416 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 20:15:30,419 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 20:15:30,420 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 08:15:29" (1/3) ... [2020-08-18 20:15:30,420 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e6a1661 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 08:15:30, skipping insertion in model container [2020-08-18 20:15:30,421 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:15:29" (2/3) ... [2020-08-18 20:15:30,421 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e6a1661 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 08:15:30, skipping insertion in model container [2020-08-18 20:15:30,421 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 08:15:30" (3/3) ... [2020-08-18 20:15:30,423 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_1032c.c [2020-08-18 20:15:30,434 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 20:15:30,441 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 20:15:30,457 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 20:15:30,484 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 20:15:30,484 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 20:15:30,484 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 20:15:30,484 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 20:15:30,484 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 20:15:30,485 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 20:15:30,485 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 20:15:30,485 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 20:15:30,514 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2020-08-18 20:15:30,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-18 20:15:30,522 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:15:30,523 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] [2020-08-18 20:15:30,524 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:15:30,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:15:30,530 INFO L82 PathProgramCache]: Analyzing trace with hash 636729620, now seen corresponding path program 1 times [2020-08-18 20:15:30,541 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:15:30,541 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [479834043] [2020-08-18 20:15:30,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:15:30,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:15:30,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:15:30,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:15:30,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 20:15:30,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:15:30,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-18 20:15:30,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:15:30,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 20:15:30,775 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [479834043] [2020-08-18 20:15:30,777 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:15:30,777 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 20:15:30,778 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239033959] [2020-08-18 20:15:30,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 20:15:30,784 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:15:30,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 20:15:30,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 20:15:30,799 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 4 states. [2020-08-18 20:15:30,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:15:30,976 INFO L93 Difference]: Finished difference Result 66 states and 89 transitions. [2020-08-18 20:15:30,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 20:15:30,979 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-08-18 20:15:30,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:15:30,990 INFO L225 Difference]: With dead ends: 66 [2020-08-18 20:15:30,990 INFO L226 Difference]: Without dead ends: 33 [2020-08-18 20:15:30,994 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-18 20:15:31,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-18 20:15:31,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-08-18 20:15:31,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-18 20:15:31,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-08-18 20:15:31,041 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 24 [2020-08-18 20:15:31,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:15:31,041 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-08-18 20:15:31,042 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 20:15:31,042 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-08-18 20:15:31,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-18 20:15:31,043 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:15:31,046 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] [2020-08-18 20:15:31,046 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 20:15:31,046 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:15:31,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:15:31,047 INFO L82 PathProgramCache]: Analyzing trace with hash 1180797057, now seen corresponding path program 1 times [2020-08-18 20:15:31,047 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:15:31,048 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1084011569] [2020-08-18 20:15:31,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:15:31,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 20:15:31,207 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 20:15:31,207 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 20:15:31,216 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 20:15:31,236 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 08:15:31 BoogieIcfgContainer [2020-08-18 20:15:31,237 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 20:15:31,240 INFO L168 Benchmark]: Toolchain (without parser) took 1713.37 ms. Allocated memory was 140.0 MB in the beginning and 202.9 MB in the end (delta: 62.9 MB). Free memory was 102.8 MB in the beginning and 118.1 MB in the end (delta: -15.3 MB). Peak memory consumption was 47.7 MB. Max. memory is 7.1 GB. [2020-08-18 20:15:31,241 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-18 20:15:31,242 INFO L168 Benchmark]: CACSL2BoogieTranslator took 412.37 ms. Allocated memory is still 140.0 MB. Free memory was 102.6 MB in the beginning and 91.6 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. [2020-08-18 20:15:31,243 INFO L168 Benchmark]: Boogie Preprocessor took 134.39 ms. Allocated memory was 140.0 MB in the beginning and 202.9 MB in the end (delta: 62.9 MB). Free memory was 91.6 MB in the beginning and 180.2 MB in the end (delta: -88.6 MB). Peak memory consumption was 12.3 MB. Max. memory is 7.1 GB. [2020-08-18 20:15:31,244 INFO L168 Benchmark]: RCFGBuilder took 341.01 ms. Allocated memory is still 202.9 MB. Free memory was 180.2 MB in the beginning and 161.1 MB in the end (delta: 19.1 MB). Peak memory consumption was 19.1 MB. Max. memory is 7.1 GB. [2020-08-18 20:15:31,245 INFO L168 Benchmark]: TraceAbstraction took 820.66 ms. Allocated memory is still 202.9 MB. Free memory was 160.5 MB in the beginning and 118.1 MB in the end (delta: 42.4 MB). Peak memory consumption was 42.4 MB. Max. memory is 7.1 GB. [2020-08-18 20:15:31,249 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 412.37 ms. Allocated memory is still 140.0 MB. Free memory was 102.6 MB in the beginning and 91.6 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 134.39 ms. Allocated memory was 140.0 MB in the beginning and 202.9 MB in the end (delta: 62.9 MB). Free memory was 91.6 MB in the beginning and 180.2 MB in the end (delta: -88.6 MB). Peak memory consumption was 12.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 341.01 ms. Allocated memory is still 202.9 MB. Free memory was 180.2 MB in the beginning and 161.1 MB in the end (delta: 19.1 MB). Peak memory consumption was 19.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 820.66 ms. Allocated memory is still 202.9 MB. Free memory was 160.5 MB in the beginning and 118.1 MB in the end (delta: 42.4 MB). Peak memory consumption was 42.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 79]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryArithmeticFLOAToperation at line 42, overapproximation of bitwiseAnd at line 62. Possible FailurePath: [L74] float x = 1.0f / 0.0f; [L75] CALL, EXPR round_float(x) [L12] __uint32_t w; [L14] int exponent_less_127; [L17] ieee_float_shape_type gf_u; [L18] gf_u.value = (x) [L19] EXPR gf_u.word [L19] (w) = gf_u.word [L22] exponent_less_127 = (int)((w & 0x7f800000) >> 23) - 127 [L24] COND FALSE !(exponent_less_127 < 23) [L40] COND TRUE exponent_less_127 == 128 [L42] return x + x; [L75] RET, EXPR round_float(x) [L75] float res = round_float(x); [L78] CALL, EXPR isinf_float(res) [L56] __int32_t ix; [L58] ieee_float_shape_type gf_u; [L59] gf_u.value = (x) [L60] EXPR gf_u.word [L60] (ix) = gf_u.word [L62] ix &= 0x7fffffff [L63] return ((ix) == 0x7f800000L); [L78] RET, EXPR isinf_float(res) [L78] COND TRUE !isinf_float(res) [L79] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 37 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.7s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 35 SDtfs, 30 SDslu, 5 SDs, 0 SdLazy, 40 SolverSat, 11 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=37occurred 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, 50 NumberOfCodeBlocks, 50 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 23 ConstructedInterpolants, 0 QuantifiedInterpolants, 1288 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...