/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.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_1011b.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 20:25:13,081 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 20:25:13,084 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 20:25:13,124 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-10-23 20:25:13,137 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 20:25:13,138 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 20:25:13,140 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 20:25:13,141 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 20:25:13,142 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 20:25:13,144 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 20:25:13,146 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 20:25:13,148 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 20:25:13,150 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 20:25:13,152 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 20:25:13,154 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 20:25:13,155 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 20:25:13,161 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 20:25:13,191 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 20:25:13,193 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 20:25:13,195 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 20:25:13,197 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-10-23 20:25:13,221 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 20:25:13,221 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 20:25:13,226 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 20:25:13,226 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 20:25:13,226 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 20:25:13,226 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 20:25:13,227 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 20:25:13,227 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 20:25:13,227 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 20:25:13,227 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 20:25:13,228 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 20:25:13,228 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 20:25:13,229 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 20:25:13,229 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 20:25:13,229 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 20:25:13,229 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-23 20:25:13,230 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 20:25:13,230 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 20:25:13,230 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 20:25:13,230 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 20:25:13,230 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-23 20:25:13,231 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 20:25:13,231 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 20:25:13,627 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 20:25:13,669 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 20:25:13,671 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 20:25:13,673 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 20:25:13,674 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 20:25:13,675 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1011b.c [2020-10-23 20:25:13,758 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b476e75cf/2424aebf47c44075b6863f0aee45e96a/FLAG0b909bb3d [2020-10-23 20:25:14,431 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 20:25:14,432 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_1011b.c [2020-10-23 20:25:14,441 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b476e75cf/2424aebf47c44075b6863f0aee45e96a/FLAG0b909bb3d [2020-10-23 20:25:14,767 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b476e75cf/2424aebf47c44075b6863f0aee45e96a [2020-10-23 20:25:14,770 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 20:25:14,777 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 20:25:14,781 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 20:25:14,781 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 20:25:14,785 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 20:25:14,786 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:25:14" (1/1) ... [2020-10-23 20:25:14,789 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2228acf9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:25:14, skipping insertion in model container [2020-10-23 20:25:14,789 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:25:14" (1/1) ... [2020-10-23 20:25:14,799 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 20:25:14,816 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 20:25:14,984 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 20:25:14,993 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 20:25:15,016 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 20:25:15,033 INFO L208 MainTranslator]: Completed translation [2020-10-23 20:25:15,034 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:25:15 WrapperNode [2020-10-23 20:25:15,034 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 20:25:15,035 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 20:25:15,035 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 20:25:15,035 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 20:25:15,047 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:25:15" (1/1) ... [2020-10-23 20:25:15,047 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:25:15" (1/1) ... [2020-10-23 20:25:15,055 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:25:15" (1/1) ... [2020-10-23 20:25:15,055 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:25:15" (1/1) ... [2020-10-23 20:25:15,065 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:25:15" (1/1) ... [2020-10-23 20:25:15,070 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:25:15" (1/1) ... [2020-10-23 20:25:15,072 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:25:15" (1/1) ... [2020-10-23 20:25:15,074 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 20:25:15,075 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 20:25:15,076 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 20:25:15,076 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 20:25:15,077 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:25:15" (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 [2020-10-23 20:25:15,138 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 20:25:15,139 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 20:25:15,139 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 20:25:15,139 INFO L138 BoogieDeclarations]: Found implementation of procedure fabs_float [2020-10-23 20:25:15,139 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_float [2020-10-23 20:25:15,139 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 20:25:15,139 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 20:25:15,140 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 20:25:15,140 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 20:25:15,140 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 20:25:15,140 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2020-10-23 20:25:15,140 INFO L130 BoogieDeclarations]: Found specification of procedure fabs_float [2020-10-23 20:25:15,140 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-10-23 20:25:15,141 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 20:25:15,141 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 20:25:15,141 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 20:25:15,141 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-10-23 20:25:15,141 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_float [2020-10-23 20:25:15,141 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 20:25:15,142 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 20:25:15,142 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 20:25:15,142 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 20:25:15,763 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 20:25:15,763 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-23 20:25:15,765 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:25:15 BoogieIcfgContainer [2020-10-23 20:25:15,765 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 20:25:15,767 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 20:25:15,767 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 20:25:15,771 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 20:25:15,771 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 08:25:14" (1/3) ... [2020-10-23 20:25:15,772 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@327414cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:25:15, skipping insertion in model container [2020-10-23 20:25:15,772 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:25:15" (2/3) ... [2020-10-23 20:25:15,773 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@327414cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:25:15, skipping insertion in model container [2020-10-23 20:25:15,773 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:25:15" (3/3) ... [2020-10-23 20:25:15,775 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1011b.c [2020-10-23 20:25:15,790 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-23 20:25:15,796 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 20:25:15,811 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 20:25:15,839 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 20:25:15,839 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 20:25:15,840 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-10-23 20:25:15,840 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 20:25:15,840 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 20:25:15,840 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 20:25:15,840 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 20:25:15,840 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 20:25:15,859 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states. [2020-10-23 20:25:15,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-23 20:25:15,917 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:25:15,921 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] [2020-10-23 20:25:15,922 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:25:15,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:25:15,954 INFO L82 PathProgramCache]: Analyzing trace with hash 1319003901, now seen corresponding path program 1 times [2020-10-23 20:25:15,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:25:15,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1025063428] [2020-10-23 20:25:15,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:25:16,072 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:25:16,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:25:16,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:25:16,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:25:16,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-23 20:25:16,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:25:16,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 20:25:16,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1025063428] [2020-10-23 20:25:16,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:25:16,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 20:25:16,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220296717] [2020-10-23 20:25:16,357 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 20:25:16,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:25:16,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 20:25:16,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 20:25:16,373 INFO L87 Difference]: Start difference. First operand 77 states. Second operand 4 states. [2020-10-23 20:25:16,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:25:16,631 INFO L93 Difference]: Finished difference Result 135 states and 151 transitions. [2020-10-23 20:25:16,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 20:25:16,633 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-10-23 20:25:16,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:25:16,642 INFO L225 Difference]: With dead ends: 135 [2020-10-23 20:25:16,643 INFO L226 Difference]: Without dead ends: 67 [2020-10-23 20:25:16,647 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 20:25:16,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-23 20:25:16,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-10-23 20:25:16,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-23 20:25:16,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2020-10-23 20:25:16,700 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 30 [2020-10-23 20:25:16,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:25:16,701 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2020-10-23 20:25:16,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 20:25:16,701 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2020-10-23 20:25:16,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-23 20:25:16,704 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:25:16,704 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:25:16,704 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 20:25:16,705 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:25:16,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:25:16,705 INFO L82 PathProgramCache]: Analyzing trace with hash 309504794, now seen corresponding path program 1 times [2020-10-23 20:25:16,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:25:16,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1075383877] [2020-10-23 20:25:16,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:25:16,709 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:25:16,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 20:25:16,752 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 20:25:16,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 20:25:16,787 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 20:25:16,842 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-23 20:25:16,842 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-23 20:25:16,845 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 20:25:16,871 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 08:25:16 BoogieIcfgContainer [2020-10-23 20:25:16,872 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 20:25:16,877 INFO L168 Benchmark]: Toolchain (without parser) took 2101.09 ms. Allocated memory is still 151.0 MB. Free memory was 127.1 MB in the beginning and 80.4 MB in the end (delta: 46.7 MB). Peak memory consumption was 47.1 MB. Max. memory is 8.0 GB. [2020-10-23 20:25:16,878 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 151.0 MB. Free memory is still 126.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 20:25:16,882 INFO L168 Benchmark]: CACSL2BoogieTranslator took 253.76 ms. Allocated memory is still 151.0 MB. Free memory was 126.4 MB in the beginning and 116.7 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-23 20:25:16,884 INFO L168 Benchmark]: Boogie Preprocessor took 39.60 ms. Allocated memory is still 151.0 MB. Free memory was 116.7 MB in the beginning and 114.9 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-23 20:25:16,886 INFO L168 Benchmark]: RCFGBuilder took 690.00 ms. Allocated memory is still 151.0 MB. Free memory was 114.9 MB in the beginning and 93.9 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. [2020-10-23 20:25:16,886 INFO L168 Benchmark]: TraceAbstraction took 1104.84 ms. Allocated memory is still 151.0 MB. Free memory was 93.6 MB in the beginning and 80.4 MB in the end (delta: 13.2 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2020-10-23 20:25:16,899 INFO L339 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 151.0 MB. Free memory is still 126.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 253.76 ms. Allocated memory is still 151.0 MB. Free memory was 126.4 MB in the beginning and 116.7 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 39.60 ms. Allocated memory is still 151.0 MB. Free memory was 116.7 MB in the beginning and 114.9 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 690.00 ms. Allocated memory is still 151.0 MB. Free memory was 114.9 MB in the beginning and 93.9 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1104.84 ms. Allocated memory is still 151.0 MB. Free memory was 93.6 MB in the beginning and 80.4 MB in the end (delta: 13.2 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 3]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 51, overapproximation of someUnaryFLOAToperation at line 47, overapproximation of bitwiseAnd at line 23. Possible FailurePath: [L47] float x = -0.0f; [L48] CALL, EXPR fabs_float(x) [L15] __uint32_t ix; [L17] ieee_float_shape_type gf_u; [L18] gf_u.value = (x) [L19] EXPR gf_u.word [L19] (ix) = gf_u.word [L22] ieee_float_shape_type sf_u; [L23] sf_u.word = (ix & 0x7fffffff) [L24] EXPR sf_u.value [L24] (x) = sf_u.value [L26] return x; [L48] RET, EXPR fabs_float(x) [L48] float res = fabs_float(x); [L51] EXPR res == 0.0f && __signbit_float(res) == 0 [L51] COND TRUE !(res == 0.0f && __signbit_float(res) == 0) [L52] CALL reach_error() [L3] __assert_fail("0", "float_req_bl_1011b.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 77 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.0s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 71 SDtfs, 13 SDslu, 44 SDs, 0 SdLazy, 84 SolverSat, 8 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, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=77occurred 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...