/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 -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/float-newlib/float_req_bl_1032a.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-86f66a4 [2020-07-07 13:01:53,084 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-07 13:01:53,086 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-07 13:01:53,104 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-07 13:01:53,104 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-07 13:01:53,106 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-07 13:01:53,108 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-07 13:01:53,118 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-07 13:01:53,121 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-07 13:01:53,124 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-07 13:01:53,126 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-07 13:01:53,128 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-07 13:01:53,129 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-07 13:01:53,130 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-07 13:01:53,132 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-07 13:01:53,134 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-07 13:01:53,135 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-07 13:01:53,136 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-07 13:01:53,138 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-07 13:01:53,142 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-07 13:01:53,147 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-07 13:01:53,151 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-07 13:01:53,152 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-07 13:01:53,153 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-07 13:01:53,155 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-07 13:01:53,165 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-07 13:01:53,166 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-07 13:01:53,167 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-07 13:01:53,168 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-07-07 13:01:53,189 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-07 13:01:53,189 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-07 13:01:53,190 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-07 13:01:53,190 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-07 13:01:53,191 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-07 13:01:53,191 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-07 13:01:53,191 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-07 13:01:53,191 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-07 13:01:53,191 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-07 13:01:53,192 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-07 13:01:53,193 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-07 13:01:53,193 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-07 13:01:53,193 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-07 13:01:53,193 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-07 13:01:53,194 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-07 13:01:53,194 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-07 13:01:53,194 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-07 13:01:53,194 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-07 13:01:53,194 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 13:01:53,195 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-07 13:01:53,195 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-07 13:01:53,195 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-07 13:01:53,195 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-07-07 13:01:53,482 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-07 13:01:53,496 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-07 13:01:53,499 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-07 13:01:53,501 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-07 13:01:53,501 INFO L275 PluginConnector]: CDTParser initialized [2020-07-07 13:01:53,502 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1032a.c [2020-07-07 13:01:53,576 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d24c7aea6/3384e9cf8a6e46b79bc144f8239dbe66/FLAG4f02ba68a [2020-07-07 13:01:54,073 INFO L306 CDTParser]: Found 1 translation units. [2020-07-07 13:01:54,074 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_1032a.c [2020-07-07 13:01:54,082 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d24c7aea6/3384e9cf8a6e46b79bc144f8239dbe66/FLAG4f02ba68a [2020-07-07 13:01:54,413 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d24c7aea6/3384e9cf8a6e46b79bc144f8239dbe66 [2020-07-07 13:01:54,422 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-07 13:01:54,424 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-07 13:01:54,425 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-07 13:01:54,425 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-07 13:01:54,429 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-07 13:01:54,430 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 01:01:54" (1/1) ... [2020-07-07 13:01:54,433 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@581710b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:01:54, skipping insertion in model container [2020-07-07 13:01:54,433 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 01:01:54" (1/1) ... [2020-07-07 13:01:54,440 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-07 13:01:54,458 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-07 13:01:54,673 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 13:01:54,677 INFO L203 MainTranslator]: Completed pre-run [2020-07-07 13:01:54,705 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 13:01:54,728 INFO L208 MainTranslator]: Completed translation [2020-07-07 13:01:54,729 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:01:54 WrapperNode [2020-07-07 13:01:54,729 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-07 13:01:54,729 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-07 13:01:54,730 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-07 13:01:54,730 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-07 13:01:54,836 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:01:54" (1/1) ... [2020-07-07 13:01:54,836 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:01:54" (1/1) ... [2020-07-07 13:01:54,845 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:01:54" (1/1) ... [2020-07-07 13:01:54,845 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:01:54" (1/1) ... [2020-07-07 13:01:54,861 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:01:54" (1/1) ... [2020-07-07 13:01:54,869 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:01:54" (1/1) ... [2020-07-07 13:01:54,872 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:01:54" (1/1) ... [2020-07-07 13:01:54,880 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-07 13:01:54,881 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-07 13:01:54,881 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-07 13:01:54,881 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-07 13:01:54,882 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:01:54" (1/1) ... No working directory specified, using /storage/repos/ultimate/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 [2020-07-07 13:01:54,940 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-07 13:01:54,940 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-07 13:01:54,941 INFO L138 BoogieDeclarations]: Found implementation of procedure round_float [2020-07-07 13:01:54,941 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_float [2020-07-07 13:01:54,941 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-07 13:01:54,941 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-07 13:01:54,941 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2020-07-07 13:01:54,941 INFO L130 BoogieDeclarations]: Found specification of procedure round_float [2020-07-07 13:01:54,941 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-07 13:01:54,942 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-07-07 13:01:54,942 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-07 13:01:54,942 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-07 13:01:54,942 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-07 13:01:54,942 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-07-07 13:01:54,942 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_float [2020-07-07 13:01:54,943 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-07 13:01:54,943 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-07 13:01:54,943 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-07 13:01:55,303 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-07 13:01:55,303 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-07-07 13:01:55,308 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 01:01:55 BoogieIcfgContainer [2020-07-07 13:01:55,308 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-07 13:01:55,309 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-07 13:01:55,309 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-07 13:01:55,312 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-07 13:01:55,313 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 01:01:54" (1/3) ... [2020-07-07 13:01:55,313 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54ba2bc7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 01:01:55, skipping insertion in model container [2020-07-07 13:01:55,314 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:01:54" (2/3) ... [2020-07-07 13:01:55,314 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54ba2bc7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 01:01:55, skipping insertion in model container [2020-07-07 13:01:55,314 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 01:01:55" (3/3) ... [2020-07-07 13:01:55,316 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_1032a.c [2020-07-07 13:01:55,327 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-07 13:01:55,334 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-07 13:01:55,363 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-07 13:01:55,379 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-07 13:01:55,382 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-07 13:01:55,382 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-07-07 13:01:55,382 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-07 13:01:55,382 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-07 13:01:55,382 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-07 13:01:55,382 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-07 13:01:55,382 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-07 13:01:55,400 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states. [2020-07-07 13:01:55,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-07 13:01:55,410 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:01:55,410 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:01:55,411 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:01:55,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:01:55,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1398005522, now seen corresponding path program 1 times [2020-07-07 13:01:55,424 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:01:55,424 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1083157218] [2020-07-07 13:01:55,425 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:01:55,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:01:55,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:01:55,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:01:55,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:01:55,681 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:01:55,684 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1083157218] [2020-07-07 13:01:55,689 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:01:55,689 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 13:01:55,690 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582023017] [2020-07-07 13:01:55,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 13:01:55,699 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:01:55,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 13:01:55,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 13:01:55,717 INFO L87 Difference]: Start difference. First operand 84 states. Second operand 4 states. [2020-07-07 13:01:55,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:01:55,982 INFO L93 Difference]: Finished difference Result 155 states and 180 transitions. [2020-07-07 13:01:55,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 13:01:55,984 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-07-07 13:01:55,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:01:55,996 INFO L225 Difference]: With dead ends: 155 [2020-07-07 13:01:55,996 INFO L226 Difference]: Without dead ends: 76 [2020-07-07 13:01:56,001 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 [2020-07-07 13:01:56,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-07-07 13:01:56,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2020-07-07 13:01:56,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-07-07 13:01:56,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 81 transitions. [2020-07-07 13:01:56,055 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 81 transitions. Word has length 27 [2020-07-07 13:01:56,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:01:56,055 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 81 transitions. [2020-07-07 13:01:56,056 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 13:01:56,056 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 81 transitions. [2020-07-07 13:01:56,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-07-07 13:01:56,058 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:01:56,058 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:01:56,058 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-07 13:01:56,059 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:01:56,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:01:56,059 INFO L82 PathProgramCache]: Analyzing trace with hash -687584586, now seen corresponding path program 1 times [2020-07-07 13:01:56,060 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:01:56,060 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1990277549] [2020-07-07 13:01:56,060 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:01:56,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-07 13:01:56,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-07 13:01:56,210 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:01:56,211 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-07 13:01:56,211 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-07 13:01:56,212 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-07 13:01:56,230 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.07 01:01:56 BoogieIcfgContainer [2020-07-07 13:01:56,230 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-07 13:01:56,233 INFO L168 Benchmark]: Toolchain (without parser) took 1808.38 ms. Allocated memory was 140.0 MB in the beginning and 203.9 MB in the end (delta: 64.0 MB). Free memory was 104.3 MB in the beginning and 104.1 MB in the end (delta: 148.9 kB). Peak memory consumption was 64.1 MB. Max. memory is 7.1 GB. [2020-07-07 13:01:56,235 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 140.0 MB. Free memory was 122.9 MB in the beginning and 122.7 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2020-07-07 13:01:56,236 INFO L168 Benchmark]: CACSL2BoogieTranslator took 304.00 ms. Allocated memory is still 140.0 MB. Free memory was 104.1 MB in the beginning and 93.2 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. [2020-07-07 13:01:56,237 INFO L168 Benchmark]: Boogie Preprocessor took 150.94 ms. Allocated memory was 140.0 MB in the beginning and 203.9 MB in the end (delta: 64.0 MB). Free memory was 93.0 MB in the beginning and 181.5 MB in the end (delta: -88.5 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. [2020-07-07 13:01:56,238 INFO L168 Benchmark]: RCFGBuilder took 427.58 ms. Allocated memory is still 203.9 MB. Free memory was 181.5 MB in the beginning and 157.7 MB in the end (delta: 23.8 MB). Peak memory consumption was 23.8 MB. Max. memory is 7.1 GB. [2020-07-07 13:01:56,239 INFO L168 Benchmark]: TraceAbstraction took 921.28 ms. Allocated memory is still 203.9 MB. Free memory was 157.7 MB in the beginning and 104.1 MB in the end (delta: 53.5 MB). Peak memory consumption was 53.5 MB. Max. memory is 7.1 GB. [2020-07-07 13:01:56,243 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 140.0 MB. Free memory was 122.9 MB in the beginning and 122.7 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 304.00 ms. Allocated memory is still 140.0 MB. Free memory was 104.1 MB in the beginning and 93.2 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 150.94 ms. Allocated memory was 140.0 MB in the beginning and 203.9 MB in the end (delta: 64.0 MB). Free memory was 93.0 MB in the beginning and 181.5 MB in the end (delta: -88.5 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 427.58 ms. Allocated memory is still 203.9 MB. Free memory was 181.5 MB in the beginning and 157.7 MB in the end (delta: 23.8 MB). Peak memory consumption was 23.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 921.28 ms. Allocated memory is still 203.9 MB. Free memory was 157.7 MB in the beginning and 104.1 MB in the end (delta: 53.5 MB). Peak memory consumption was 53.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 80]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 79, overapproximation of bitwiseAnd at line 23, overapproximation of someBinaryArithmeticFLOAToperation at line 43. Possible FailurePath: [L75] float x = 0.0f; [L76] CALL, EXPR round_float(x) [L13] __uint32_t w; [L15] int exponent_less_127; [L18] ieee_float_shape_type gf_u; [L19] gf_u.value = (x) [L20] EXPR gf_u.word [L20] (w) = gf_u.word [L23] exponent_less_127 = (int)((w & 0x7f800000) >> 23) - 127 [L25] COND FALSE !(exponent_less_127 < 23) [L41] COND TRUE exponent_less_127 == 128 [L43] return x + x; [L76] RET, EXPR round_float(x) [L76] float res = round_float(x); [L79] EXPR res == 0.0f && __signbit_float(res) == 0 [L79] COND TRUE !(res == 0.0f && __signbit_float(res) == 0) [L80] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 84 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: 85 SDtfs, 13 SDslu, 64 SDs, 0 SdLazy, 94 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=84occurred 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: No data available, 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...