/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.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/float-newlib/float_req_bl_1092a.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 21:50:32,266 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 21:50:32,269 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 21:50:32,312 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-08-22 21:50:32,337 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 21:50:32,339 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 21:50:32,342 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 21:50:32,343 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 21:50:32,344 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 21:50:32,345 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 21:50:32,347 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 21:50:32,353 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 21:50:32,355 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 21:50:32,356 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 21:50:32,358 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 21:50:32,358 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 21:50:32,362 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 21:50:32,371 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 21:50:32,372 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 21:50:32,373 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 21:50:32,374 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-08-22 21:50:32,390 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 21:50:32,390 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 21:50:32,392 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 21:50:32,392 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 21:50:32,393 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 21:50:32,393 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 21:50:32,393 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 21:50:32,393 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 21:50:32,394 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 21:50:32,394 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 21:50:32,395 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 21:50:32,395 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 21:50:32,395 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 21:50:32,395 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 21:50:32,396 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 21:50:32,396 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 21:50:32,396 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 21:50:32,396 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 21:50:32,396 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 21:50:32,397 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 21:50:32,397 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 21:50:32,397 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 21:50:32,397 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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: Use separate solver for trace checks -> true [2020-08-22 21:50:32,689 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 21:50:32,708 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 21:50:32,713 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 21:50:32,715 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 21:50:32,715 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 21:50:32,716 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1092a.c [2020-08-22 21:50:32,783 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/471dd90ed/4d7749a607e34fadb209308d7f343558/FLAG7fa110254 [2020-08-22 21:50:33,244 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 21:50:33,245 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_1092a.c [2020-08-22 21:50:33,252 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/471dd90ed/4d7749a607e34fadb209308d7f343558/FLAG7fa110254 [2020-08-22 21:50:33,671 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/471dd90ed/4d7749a607e34fadb209308d7f343558 [2020-08-22 21:50:33,679 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 21:50:33,681 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 21:50:33,682 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 21:50:33,682 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 21:50:33,687 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 21:50:33,688 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 09:50:33" (1/1) ... [2020-08-22 21:50:33,691 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16f62795 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 09:50:33, skipping insertion in model container [2020-08-22 21:50:33,691 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 09:50:33" (1/1) ... [2020-08-22 21:50:33,699 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 21:50:33,718 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 21:50:33,895 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 21:50:33,898 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 21:50:33,927 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 21:50:34,030 INFO L208 MainTranslator]: Completed translation [2020-08-22 21:50:34,031 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 09:50:34 WrapperNode [2020-08-22 21:50:34,031 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 21:50:34,032 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 21:50:34,032 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 21:50:34,032 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 21:50:34,046 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 09:50:34" (1/1) ... [2020-08-22 21:50:34,046 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 09:50:34" (1/1) ... [2020-08-22 21:50:34,056 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 09:50:34" (1/1) ... [2020-08-22 21:50:34,057 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 09:50:34" (1/1) ... [2020-08-22 21:50:34,066 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 09:50:34" (1/1) ... [2020-08-22 21:50:34,072 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 09:50:34" (1/1) ... [2020-08-22 21:50:34,074 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 09:50:34" (1/1) ... [2020-08-22 21:50:34,077 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 21:50:34,077 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 21:50:34,077 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 21:50:34,078 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 21:50:34,078 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 09:50:34" (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 [2020-08-22 21:50:34,141 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 21:50:34,141 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 21:50:34,141 INFO L138 BoogieDeclarations]: Found implementation of procedure ceil_float [2020-08-22 21:50:34,142 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_float [2020-08-22 21:50:34,142 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 21:50:34,142 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 21:50:34,142 INFO L130 BoogieDeclarations]: Found specification of procedure ceil_float [2020-08-22 21:50:34,142 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-22 21:50:34,142 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-08-22 21:50:34,143 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-22 21:50:34,143 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-22 21:50:34,144 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-22 21:50:34,144 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-08-22 21:50:34,144 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_float [2020-08-22 21:50:34,144 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 21:50:34,145 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 21:50:34,145 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 21:50:34,508 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 21:50:34,508 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-08-22 21:50:34,513 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 09:50:34 BoogieIcfgContainer [2020-08-22 21:50:34,513 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 21:50:34,515 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 21:50:34,515 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 21:50:34,518 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 21:50:34,518 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 09:50:33" (1/3) ... [2020-08-22 21:50:34,519 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56ad35e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 09:50:34, skipping insertion in model container [2020-08-22 21:50:34,519 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 09:50:34" (2/3) ... [2020-08-22 21:50:34,520 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56ad35e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 09:50:34, skipping insertion in model container [2020-08-22 21:50:34,520 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 09:50:34" (3/3) ... [2020-08-22 21:50:34,521 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_1092a.c [2020-08-22 21:50:34,531 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 21:50:34,538 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 21:50:34,553 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 21:50:34,591 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 21:50:34,591 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 21:50:34,592 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 21:50:34,592 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 21:50:34,592 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 21:50:34,592 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 21:50:34,592 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 21:50:34,592 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 21:50:34,610 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states. [2020-08-22 21:50:34,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-22 21:50:34,622 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:50:34,623 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] [2020-08-22 21:50:34,623 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:50:34,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:50:34,629 INFO L82 PathProgramCache]: Analyzing trace with hash 818160258, now seen corresponding path program 1 times [2020-08-22 21:50:34,638 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:50:34,638 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1084182771] [2020-08-22 21:50:34,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:50:34,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:50:34,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:50:34,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:50:34,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-22 21:50:34,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:50:34,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 21:50:34,890 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1084182771] [2020-08-22 21:50:34,892 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 21:50:34,892 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 21:50:34,893 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987349865] [2020-08-22 21:50:34,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 21:50:34,899 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:50:34,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 21:50:34,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 21:50:34,913 INFO L87 Difference]: Start difference. First operand 92 states. Second operand 4 states. [2020-08-22 21:50:35,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:50:35,199 INFO L93 Difference]: Finished difference Result 168 states and 201 transitions. [2020-08-22 21:50:35,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 21:50:35,201 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2020-08-22 21:50:35,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:50:35,219 INFO L225 Difference]: With dead ends: 168 [2020-08-22 21:50:35,220 INFO L226 Difference]: Without dead ends: 84 [2020-08-22 21:50:35,224 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 [2020-08-22 21:50:35,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-08-22 21:50:35,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2020-08-22 21:50:35,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-08-22 21:50:35,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 93 transitions. [2020-08-22 21:50:35,275 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 93 transitions. Word has length 31 [2020-08-22 21:50:35,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:50:35,276 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 93 transitions. [2020-08-22 21:50:35,276 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 21:50:35,276 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 93 transitions. [2020-08-22 21:50:35,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-08-22 21:50:35,278 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:50:35,279 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] [2020-08-22 21:50:35,279 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 21:50:35,280 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:50:35,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:50:35,280 INFO L82 PathProgramCache]: Analyzing trace with hash -1168745686, now seen corresponding path program 1 times [2020-08-22 21:50:35,281 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:50:35,281 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1041106384] [2020-08-22 21:50:35,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:50:35,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 21:50:35,350 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 21:50:35,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 21:50:35,390 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 21:50:35,422 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-22 21:50:35,422 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 21:50:35,423 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 21:50:35,460 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 09:50:35 BoogieIcfgContainer [2020-08-22 21:50:35,460 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 21:50:35,463 INFO L168 Benchmark]: Toolchain (without parser) took 1781.70 ms. Allocated memory was 140.5 MB in the beginning and 203.9 MB in the end (delta: 63.4 MB). Free memory was 103.5 MB in the beginning and 96.7 MB in the end (delta: 6.8 MB). Peak memory consumption was 70.2 MB. Max. memory is 7.1 GB. [2020-08-22 21:50:35,464 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 140.5 MB. Free memory was 121.8 MB in the beginning and 121.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-22 21:50:35,466 INFO L168 Benchmark]: CACSL2BoogieTranslator took 349.71 ms. Allocated memory was 140.5 MB in the beginning and 203.9 MB in the end (delta: 63.4 MB). Free memory was 103.3 MB in the beginning and 182.2 MB in the end (delta: -79.0 MB). Peak memory consumption was 23.7 MB. Max. memory is 7.1 GB. [2020-08-22 21:50:35,467 INFO L168 Benchmark]: Boogie Preprocessor took 45.10 ms. Allocated memory is still 203.9 MB. Free memory was 182.2 MB in the beginning and 180.0 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. [2020-08-22 21:50:35,467 INFO L168 Benchmark]: RCFGBuilder took 436.28 ms. Allocated memory is still 203.9 MB. Free memory was 180.0 MB in the beginning and 155.7 MB in the end (delta: 24.3 MB). Peak memory consumption was 24.3 MB. Max. memory is 7.1 GB. [2020-08-22 21:50:35,468 INFO L168 Benchmark]: TraceAbstraction took 945.59 ms. Allocated memory is still 203.9 MB. Free memory was 155.1 MB in the beginning and 96.7 MB in the end (delta: 58.4 MB). Peak memory consumption was 58.4 MB. Max. memory is 7.1 GB. [2020-08-22 21:50:35,473 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 140.5 MB. Free memory was 121.8 MB in the beginning and 121.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 349.71 ms. Allocated memory was 140.5 MB in the beginning and 203.9 MB in the end (delta: 63.4 MB). Free memory was 103.3 MB in the beginning and 182.2 MB in the end (delta: -79.0 MB). Peak memory consumption was 23.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 45.10 ms. Allocated memory is still 203.9 MB. Free memory was 182.2 MB in the beginning and 180.0 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 436.28 ms. Allocated memory is still 203.9 MB. Free memory was 180.0 MB in the beginning and 155.7 MB in the end (delta: 24.3 MB). Peak memory consumption was 24.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 945.59 ms. Allocated memory is still 203.9 MB. Free memory was 155.1 MB in the beginning and 96.7 MB in the end (delta: 58.4 MB). Peak memory consumption was 58.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 81]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 80, overapproximation of bitwiseAnd at line 21, overapproximation of someUnaryFLOAToperation at line 76, overapproximation of someBinaryArithmeticFLOAToperation at line 44. Possible FailurePath: [L11] static const float huge_ceil = 1.0e30; VAL [\old(huge_ceil)=1000000000000000000000000000004, huge_ceil=1000000000000000000000000000000] [L76] float x = -0.0f; VAL [huge_ceil=1000000000000000000000000000000] [L77] CALL, EXPR ceil_float(x) VAL [\old(x)=1000000000000000000000000000005, huge_ceil=1000000000000000000000000000000] [L14] __int32_t i0, j0; VAL [\old(x)=1000000000000000000000000000005, huge_ceil=1000000000000000000000000000000, x=1000000000000000000000000000005] [L15] __uint32_t i, ix; VAL [\old(x)=1000000000000000000000000000005, huge_ceil=1000000000000000000000000000000, x=1000000000000000000000000000005] [L17] ieee_float_shape_type gf_u; VAL [\old(x)=1000000000000000000000000000005, gf_u={2:0}, huge_ceil=1000000000000000000000000000000, x=1000000000000000000000000000005] [L18] gf_u.value = (x) VAL [\old(x)=1000000000000000000000000000005, gf_u={2:0}, huge_ceil=1000000000000000000000000000000, x=1000000000000000000000000000005] [L19] EXPR gf_u.word VAL [\old(x)=1000000000000000000000000000005, gf_u={2:0}, gf_u.word=4294967295, huge_ceil=1000000000000000000000000000000, x=1000000000000000000000000000005] [L19] (i0) = gf_u.word VAL [\old(x)=1000000000000000000000000000005, gf_u={2:0}, gf_u.word=4294967295, huge_ceil=1000000000000000000000000000000, i0=-1, x=1000000000000000000000000000005] [L21] ix = (i0 & 0x7fffffff) VAL [\old(x)=1000000000000000000000000000005, huge_ceil=1000000000000000000000000000000, i0=-1, x=1000000000000000000000000000005] [L22] j0 = (ix >> 23) - 0x7f VAL [\old(x)=1000000000000000000000000000005, huge_ceil=1000000000000000000000000000000, i=-36028792723996673, i0=-1, j0=384, x=1000000000000000000000000000005] [L23] COND FALSE !(j0 < 23) VAL [\old(x)=1000000000000000000000000000005, huge_ceil=1000000000000000000000000000000, i=-36028792723996673, i0=-1, j0=384, x=1000000000000000000000000000005] [L43] COND TRUE !((ix) < 0x7f800000L) VAL [\old(x)=1000000000000000000000000000005, huge_ceil=1000000000000000000000000000000, i=-36028792723996673, i0=-1, j0=384, x=1000000000000000000000000000005] [L44] return x + x; VAL [\old(x)=1000000000000000000000000000005, huge_ceil=1000000000000000000000000000000, i=-36028792723996673, i0=-1, j0=384, x=1000000000000000000000000000005] [L77] RET, EXPR ceil_float(x) VAL [ceil_float(x)=1000000000000000000000000000003, huge_ceil=1000000000000000000000000000000, x=1000000000000000000000000000005] [L77] float res = ceil_float(x); VAL [ceil_float(x)=1000000000000000000000000000003, huge_ceil=1000000000000000000000000000000, res=1000000000000000000000000000003, x=1000000000000000000000000000005] [L80] EXPR res == -0.0f && __signbit_float(res) == 1 VAL [huge_ceil=1000000000000000000000000000000, res=1000000000000000000000000000003, res == -0.0f && __signbit_float(res) == 1=0, x=1000000000000000000000000000005] [L80] COND TRUE !(res == -0.0f && __signbit_float(res) == 1) VAL [huge_ceil=1000000000000000000000000000000, res=1000000000000000000000000000003, res == -0.0f && __signbit_float(res) == 1=0, x=1000000000000000000000000000005] [L81] __VERIFIER_error() VAL [huge_ceil=1000000000000000000000000000000, res=1000000000000000000000000000003, x=1000000000000000000000000000005] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 92 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: 97 SDtfs, 17 SDslu, 73 SDs, 0 SdLazy, 105 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=92occurred 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, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 71 NumberOfCodeBlocks, 71 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 30 ConstructedInterpolants, 0 QuantifiedInterpolants, 1620 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...