/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 0.1.25-3af5e1f [2020-09-04 16:11:11,638 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 16:11:11,642 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 16:11:11,684 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 16:11:11,685 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 16:11:11,693 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 16:11:11,696 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 16:11:11,700 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 16:11:11,703 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 16:11:11,706 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 16:11:11,708 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 16:11:11,709 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 16:11:11,709 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 16:11:11,712 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 16:11:11,714 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 16:11:11,716 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 16:11:11,718 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 16:11:11,719 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 16:11:11,720 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 16:11:11,730 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 16:11:11,732 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 16:11:11,733 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 16:11:11,735 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 16:11:11,736 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 16:11:11,751 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-04 16:11:11,766 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 16:11:11,768 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 16:11:11,768 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 16:11:11,770 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-09-04 16:11:11,790 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 16:11:11,791 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 16:11:11,792 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 16:11:11,792 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 16:11:11,793 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 16:11:11,793 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 16:11:11,793 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 16:11:11,793 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 16:11:11,793 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 16:11:11,794 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 16:11:11,794 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 16:11:11,794 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 16:11:11,794 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 16:11:11,794 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 16:11:11,795 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 16:11:11,795 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-09-04 16:11:11,795 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 16:11:11,795 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 16:11:11,795 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 16:11:11,796 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 16:11:11,796 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-09-04 16:11:11,796 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 16:11:11,796 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-09-04 16:11:12,214 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 16:11:12,234 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 16:11:12,238 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 16:11:12,240 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 16:11:12,241 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 16:11:12,242 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1032a.c [2020-09-04 16:11:12,331 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8b5c01660/1b16fad4c735484aae4b3c5d656cb028/FLAG0b6df3208 [2020-09-04 16:11:12,871 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 16:11:12,872 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-newlib/float_req_bl_1032a.c [2020-09-04 16:11:12,882 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8b5c01660/1b16fad4c735484aae4b3c5d656cb028/FLAG0b6df3208 [2020-09-04 16:11:13,195 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8b5c01660/1b16fad4c735484aae4b3c5d656cb028 [2020-09-04 16:11:13,207 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 16:11:13,209 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 16:11:13,211 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 16:11:13,211 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 16:11:13,215 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 16:11:13,216 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 04:11:13" (1/1) ... [2020-09-04 16:11:13,220 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@177f3252 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:11:13, skipping insertion in model container [2020-09-04 16:11:13,221 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 04:11:13" (1/1) ... [2020-09-04 16:11:13,229 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 16:11:13,258 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 16:11:13,480 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 16:11:13,485 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 16:11:13,517 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 16:11:13,544 INFO L208 MainTranslator]: Completed translation [2020-09-04 16:11:13,545 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:11:13 WrapperNode [2020-09-04 16:11:13,545 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 16:11:13,546 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 16:11:13,546 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 16:11:13,546 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 16:11:13,639 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:11:13" (1/1) ... [2020-09-04 16:11:13,639 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:11:13" (1/1) ... [2020-09-04 16:11:13,651 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:11:13" (1/1) ... [2020-09-04 16:11:13,651 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:11:13" (1/1) ... [2020-09-04 16:11:13,674 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:11:13" (1/1) ... [2020-09-04 16:11:13,680 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:11:13" (1/1) ... [2020-09-04 16:11:13,682 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:11:13" (1/1) ... [2020-09-04 16:11:13,685 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 16:11:13,686 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 16:11:13,686 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 16:11:13,686 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 16:11:13,687 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:11:13" (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 [2020-09-04 16:11:13,757 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 16:11:13,758 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 16:11:13,758 INFO L138 BoogieDeclarations]: Found implementation of procedure round_float [2020-09-04 16:11:13,758 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_float [2020-09-04 16:11:13,758 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 16:11:13,758 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 16:11:13,758 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2020-09-04 16:11:13,759 INFO L130 BoogieDeclarations]: Found specification of procedure round_float [2020-09-04 16:11:13,759 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-04 16:11:13,759 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-09-04 16:11:13,759 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-04 16:11:13,759 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-04 16:11:13,759 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-04 16:11:13,760 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-09-04 16:11:13,760 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_float [2020-09-04 16:11:13,760 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 16:11:13,760 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 16:11:13,760 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 16:11:14,174 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 16:11:14,175 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-09-04 16:11:14,180 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 04:11:14 BoogieIcfgContainer [2020-09-04 16:11:14,180 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 16:11:14,182 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 16:11:14,182 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 16:11:14,186 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 16:11:14,186 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 04:11:13" (1/3) ... [2020-09-04 16:11:14,187 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5603234c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 04:11:14, skipping insertion in model container [2020-09-04 16:11:14,187 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:11:13" (2/3) ... [2020-09-04 16:11:14,187 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5603234c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 04:11:14, skipping insertion in model container [2020-09-04 16:11:14,188 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 04:11:14" (3/3) ... [2020-09-04 16:11:14,190 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_1032a.c [2020-09-04 16:11:14,199 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-04 16:11:14,209 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 16:11:14,232 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 16:11:14,260 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 16:11:14,261 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 16:11:14,261 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-09-04 16:11:14,261 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 16:11:14,261 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 16:11:14,262 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 16:11:14,262 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 16:11:14,263 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 16:11:14,283 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states. [2020-09-04 16:11:14,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-04 16:11:14,297 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:11:14,299 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] [2020-09-04 16:11:14,299 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:11:14,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:11:14,307 INFO L82 PathProgramCache]: Analyzing trace with hash -1398005522, now seen corresponding path program 1 times [2020-09-04 16:11:14,319 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:11:14,320 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [776333676] [2020-09-04 16:11:14,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:11:14,407 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:11:14,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:11:14,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:11:14,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:11:14,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-04 16:11:14,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:11:14,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 16:11:14,602 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [776333676] [2020-09-04 16:11:14,609 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:11:14,609 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 16:11:14,610 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704268719] [2020-09-04 16:11:14,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 16:11:14,616 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:11:14,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 16:11:14,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 16:11:14,635 INFO L87 Difference]: Start difference. First operand 84 states. Second operand 4 states. [2020-09-04 16:11:14,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:11:14,897 INFO L93 Difference]: Finished difference Result 155 states and 180 transitions. [2020-09-04 16:11:14,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 16:11:14,899 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-09-04 16:11:14,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:11:14,912 INFO L225 Difference]: With dead ends: 155 [2020-09-04 16:11:14,912 INFO L226 Difference]: Without dead ends: 76 [2020-09-04 16:11:14,917 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 [2020-09-04 16:11:14,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-09-04 16:11:14,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2020-09-04 16:11:14,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-04 16:11:14,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 81 transitions. [2020-09-04 16:11:14,977 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 81 transitions. Word has length 27 [2020-09-04 16:11:14,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:11:14,978 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 81 transitions. [2020-09-04 16:11:14,978 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 16:11:14,978 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 81 transitions. [2020-09-04 16:11:14,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-04 16:11:14,980 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:11:14,980 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] [2020-09-04 16:11:14,981 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 16:11:14,981 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:11:14,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:11:14,982 INFO L82 PathProgramCache]: Analyzing trace with hash -687584586, now seen corresponding path program 1 times [2020-09-04 16:11:14,982 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:11:14,983 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [754011358] [2020-09-04 16:11:14,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:11:14,985 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:11:15,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 16:11:15,044 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 16:11:15,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 16:11:15,082 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 16:11:15,134 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-04 16:11:15,135 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-04 16:11:15,135 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 16:11:15,181 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 04:11:15 BoogieIcfgContainer [2020-09-04 16:11:15,181 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 16:11:15,185 INFO L168 Benchmark]: Toolchain (without parser) took 1974.73 ms. Allocated memory was 140.5 MB in the beginning and 204.5 MB in the end (delta: 64.0 MB). Free memory was 105.0 MB in the beginning and 104.3 MB in the end (delta: 676.6 kB). Peak memory consumption was 64.6 MB. Max. memory is 7.1 GB. [2020-09-04 16:11:15,186 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 140.5 MB. Free memory was 123.1 MB in the beginning and 122.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-04 16:11:15,187 INFO L168 Benchmark]: CACSL2BoogieTranslator took 334.60 ms. Allocated memory is still 140.5 MB. Free memory was 104.7 MB in the beginning and 93.3 MB in the end (delta: 11.4 MB). Peak memory consumption was 11.4 MB. Max. memory is 7.1 GB. [2020-09-04 16:11:15,188 INFO L168 Benchmark]: Boogie Preprocessor took 139.68 ms. Allocated memory was 140.5 MB in the beginning and 204.5 MB in the end (delta: 64.0 MB). Free memory was 93.3 MB in the beginning and 181.7 MB in the end (delta: -88.4 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. [2020-09-04 16:11:15,189 INFO L168 Benchmark]: RCFGBuilder took 494.85 ms. Allocated memory is still 204.5 MB. Free memory was 181.7 MB in the beginning and 159.0 MB in the end (delta: 22.7 MB). Peak memory consumption was 22.7 MB. Max. memory is 7.1 GB. [2020-09-04 16:11:15,190 INFO L168 Benchmark]: TraceAbstraction took 999.75 ms. Allocated memory is still 204.5 MB. Free memory was 158.3 MB in the beginning and 104.3 MB in the end (delta: 54.0 MB). Peak memory consumption was 54.0 MB. Max. memory is 7.1 GB. [2020-09-04 16:11:15,195 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 140.5 MB. Free memory was 123.1 MB in the beginning and 122.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 334.60 ms. Allocated memory is still 140.5 MB. Free memory was 104.7 MB in the beginning and 93.3 MB in the end (delta: 11.4 MB). Peak memory consumption was 11.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 139.68 ms. Allocated memory was 140.5 MB in the beginning and 204.5 MB in the end (delta: 64.0 MB). Free memory was 93.3 MB in the beginning and 181.7 MB in the end (delta: -88.4 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 494.85 ms. Allocated memory is still 204.5 MB. Free memory was 181.7 MB in the beginning and 159.0 MB in the end (delta: 22.7 MB). Peak memory consumption was 22.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 999.75 ms. Allocated memory is still 204.5 MB. Free memory was 158.3 MB in the beginning and 104.3 MB in the end (delta: 54.0 MB). Peak memory consumption was 54.0 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...