/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_1032b.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-267fbe0 [2020-07-17 13:14:03,283 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-17 13:14:03,286 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-17 13:14:03,297 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-17 13:14:03,297 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-17 13:14:03,298 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-17 13:14:03,300 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-17 13:14:03,301 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-17 13:14:03,303 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-17 13:14:03,304 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-17 13:14:03,305 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-17 13:14:03,306 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-17 13:14:03,306 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-17 13:14:03,308 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-17 13:14:03,309 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-17 13:14:03,310 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-17 13:14:03,311 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-17 13:14:03,312 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-17 13:14:03,314 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-17 13:14:03,316 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-17 13:14:03,318 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-17 13:14:03,319 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-17 13:14:03,320 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-17 13:14:03,321 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-17 13:14:03,323 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-17 13:14:03,323 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-17 13:14:03,324 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-17 13:14:03,325 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-17 13:14:03,325 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-17 13:14:03,326 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-07-17 13:14:03,331 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-17 13:14:03,332 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-17 13:14:03,333 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-17 13:14:03,334 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-07-17 13:14:03,344 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-17 13:14:03,344 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-17 13:14:03,345 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-17 13:14:03,345 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-17 13:14:03,346 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-17 13:14:03,346 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-17 13:14:03,346 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-17 13:14:03,346 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-17 13:14:03,346 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-17 13:14:03,347 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-17 13:14:03,347 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-17 13:14:03,347 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-17 13:14:03,347 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-17 13:14:03,347 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-17 13:14:03,348 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-17 13:14:03,348 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-17 13:14:03,348 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-17 13:14:03,348 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-17 13:14:03,348 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 13:14:03,349 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-17 13:14:03,349 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-17 13:14:03,349 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-17 13:14:03,349 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-07-17 13:14:03,633 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-17 13:14:03,647 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-17 13:14:03,651 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-17 13:14:03,653 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-17 13:14:03,653 INFO L275 PluginConnector]: CDTParser initialized [2020-07-17 13:14:03,654 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1032b.c [2020-07-17 13:14:03,731 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f49b7399f/fdb168fec1a74e92b71b3f3b47a7ce59/FLAG3c80e1478 [2020-07-17 13:14:04,206 INFO L306 CDTParser]: Found 1 translation units. [2020-07-17 13:14:04,207 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_1032b.c [2020-07-17 13:14:04,218 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f49b7399f/fdb168fec1a74e92b71b3f3b47a7ce59/FLAG3c80e1478 [2020-07-17 13:14:04,545 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f49b7399f/fdb168fec1a74e92b71b3f3b47a7ce59 [2020-07-17 13:14:04,555 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-17 13:14:04,559 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-17 13:14:04,560 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-17 13:14:04,560 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-17 13:14:04,564 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-17 13:14:04,565 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 01:14:04" (1/1) ... [2020-07-17 13:14:04,568 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e340e8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 01:14:04, skipping insertion in model container [2020-07-17 13:14:04,568 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 01:14:04" (1/1) ... [2020-07-17 13:14:04,576 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-17 13:14:04,598 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-17 13:14:04,783 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 13:14:04,787 INFO L203 MainTranslator]: Completed pre-run [2020-07-17 13:14:04,816 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 13:14:04,926 INFO L208 MainTranslator]: Completed translation [2020-07-17 13:14:04,926 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 01:14:04 WrapperNode [2020-07-17 13:14:04,926 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-17 13:14:04,927 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-17 13:14:04,927 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-17 13:14:04,927 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-17 13:14:04,938 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 01:14:04" (1/1) ... [2020-07-17 13:14:04,939 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 01:14:04" (1/1) ... [2020-07-17 13:14:04,949 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 01:14:04" (1/1) ... [2020-07-17 13:14:04,949 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 01:14:04" (1/1) ... [2020-07-17 13:14:04,960 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 01:14:04" (1/1) ... [2020-07-17 13:14:04,967 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 01:14:04" (1/1) ... [2020-07-17 13:14:04,969 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 01:14:04" (1/1) ... [2020-07-17 13:14:04,972 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-17 13:14:04,972 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-17 13:14:04,972 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-17 13:14:04,972 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-17 13:14:04,973 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 01:14:04" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 13:14:05,038 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-17 13:14:05,038 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-17 13:14:05,038 INFO L138 BoogieDeclarations]: Found implementation of procedure round_float [2020-07-17 13:14:05,038 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_float [2020-07-17 13:14:05,038 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-17 13:14:05,039 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-17 13:14:05,039 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2020-07-17 13:14:05,039 INFO L130 BoogieDeclarations]: Found specification of procedure round_float [2020-07-17 13:14:05,039 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-17 13:14:05,039 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-07-17 13:14:05,039 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-17 13:14:05,039 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-17 13:14:05,039 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-17 13:14:05,040 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-07-17 13:14:05,040 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_float [2020-07-17 13:14:05,040 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-17 13:14:05,040 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-17 13:14:05,040 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-17 13:14:05,466 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-17 13:14:05,467 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-07-17 13:14:05,472 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 01:14:05 BoogieIcfgContainer [2020-07-17 13:14:05,472 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-17 13:14:05,484 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-17 13:14:05,484 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-17 13:14:05,487 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-17 13:14:05,488 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.07 01:14:04" (1/3) ... [2020-07-17 13:14:05,489 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e2bdb32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 01:14:05, skipping insertion in model container [2020-07-17 13:14:05,489 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 01:14:04" (2/3) ... [2020-07-17 13:14:05,490 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e2bdb32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 01:14:05, skipping insertion in model container [2020-07-17 13:14:05,491 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 01:14:05" (3/3) ... [2020-07-17 13:14:05,492 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_1032b.c [2020-07-17 13:14:05,503 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-17 13:14:05,516 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-17 13:14:05,532 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-17 13:14:05,556 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-17 13:14:05,558 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-17 13:14:05,558 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-07-17 13:14:05,558 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-17 13:14:05,559 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-17 13:14:05,559 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-17 13:14:05,559 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-17 13:14:05,559 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-17 13:14:05,585 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states. [2020-07-17 13:14:05,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-17 13:14:05,601 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 13:14:05,603 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 13:14:05,603 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 13:14:05,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 13:14:05,610 INFO L82 PathProgramCache]: Analyzing trace with hash -1398005522, now seen corresponding path program 1 times [2020-07-17 13:14:05,620 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 13:14:05,621 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2045789548] [2020-07-17 13:14:05,621 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 13:14:05,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 13:14:05,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 13:14:05,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 13:14:05,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 13:14:05,942 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 13:14:05,944 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2045789548] [2020-07-17 13:14:05,946 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 13:14:05,947 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-17 13:14:05,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139452597] [2020-07-17 13:14:05,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-17 13:14:05,955 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 13:14:05,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-17 13:14:05,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 13:14:05,977 INFO L87 Difference]: Start difference. First operand 84 states. Second operand 4 states. [2020-07-17 13:14:06,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 13:14:06,263 INFO L93 Difference]: Finished difference Result 155 states and 180 transitions. [2020-07-17 13:14:06,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-17 13:14:06,265 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-07-17 13:14:06,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 13:14:06,276 INFO L225 Difference]: With dead ends: 155 [2020-07-17 13:14:06,277 INFO L226 Difference]: Without dead ends: 76 [2020-07-17 13:14:06,281 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-17 13:14:06,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-07-17 13:14:06,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2020-07-17 13:14:06,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-07-17 13:14:06,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 81 transitions. [2020-07-17 13:14:06,343 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 81 transitions. Word has length 27 [2020-07-17 13:14:06,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 13:14:06,345 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 81 transitions. [2020-07-17 13:14:06,345 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-17 13:14:06,346 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 81 transitions. [2020-07-17 13:14:06,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-07-17 13:14:06,348 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 13:14:06,348 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 13:14:06,349 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-17 13:14:06,349 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 13:14:06,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 13:14:06,349 INFO L82 PathProgramCache]: Analyzing trace with hash -687584586, now seen corresponding path program 1 times [2020-07-17 13:14:06,350 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 13:14:06,350 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1293059052] [2020-07-17 13:14:06,350 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 13:14:06,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-17 13:14:06,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-17 13:14:06,526 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 13:14:06,526 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-17 13:14:06,526 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-17 13:14:06,527 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-17 13:14:06,543 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.07 01:14:06 BoogieIcfgContainer [2020-07-17 13:14:06,543 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-17 13:14:06,546 INFO L168 Benchmark]: Toolchain (without parser) took 1988.36 ms. Allocated memory was 145.2 MB in the beginning and 201.9 MB in the end (delta: 56.6 MB). Free memory was 103.5 MB in the beginning and 100.9 MB in the end (delta: 2.5 MB). Peak memory consumption was 59.2 MB. Max. memory is 7.1 GB. [2020-07-17 13:14:06,547 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 145.2 MB. Free memory was 121.9 MB in the beginning and 121.6 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-07-17 13:14:06,548 INFO L168 Benchmark]: CACSL2BoogieTranslator took 366.83 ms. Allocated memory was 145.2 MB in the beginning and 201.9 MB in the end (delta: 56.6 MB). Free memory was 103.1 MB in the beginning and 180.9 MB in the end (delta: -77.8 MB). Peak memory consumption was 20.9 MB. Max. memory is 7.1 GB. [2020-07-17 13:14:06,549 INFO L168 Benchmark]: Boogie Preprocessor took 44.70 ms. Allocated memory is still 201.9 MB. Free memory was 180.9 MB in the beginning and 178.2 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. [2020-07-17 13:14:06,550 INFO L168 Benchmark]: RCFGBuilder took 500.19 ms. Allocated memory is still 201.9 MB. Free memory was 178.2 MB in the beginning and 155.4 MB in the end (delta: 22.8 MB). Peak memory consumption was 22.8 MB. Max. memory is 7.1 GB. [2020-07-17 13:14:06,551 INFO L168 Benchmark]: TraceAbstraction took 1059.34 ms. Allocated memory is still 201.9 MB. Free memory was 154.8 MB in the beginning and 101.6 MB in the end (delta: 53.2 MB). Peak memory consumption was 53.2 MB. Max. memory is 7.1 GB. [2020-07-17 13:14:06,555 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 145.2 MB. Free memory was 121.9 MB in the beginning and 121.6 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 366.83 ms. Allocated memory was 145.2 MB in the beginning and 201.9 MB in the end (delta: 56.6 MB). Free memory was 103.1 MB in the beginning and 180.9 MB in the end (delta: -77.8 MB). Peak memory consumption was 20.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 44.70 ms. Allocated memory is still 201.9 MB. Free memory was 180.9 MB in the beginning and 178.2 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 500.19 ms. Allocated memory is still 201.9 MB. Free memory was 178.2 MB in the beginning and 155.4 MB in the end (delta: 22.8 MB). Peak memory consumption was 22.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1059.34 ms. Allocated memory is still 201.9 MB. Free memory was 154.8 MB in the beginning and 101.6 MB in the end (delta: 53.2 MB). Peak memory consumption was 53.2 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 someUnaryFLOAToperation at line 75, 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) == 1 [L79] COND TRUE !(res == -0.0f && __signbit_float(res) == 1) [L80] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 84 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.9s, 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, 23 GetRequests, 20 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...