/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks NOT_INCREMENTALLY -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/float-newlib/float_req_bl_1052d.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 10:45:19,599 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 10:45:19,602 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 10:45:19,621 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 10:45:19,622 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 10:45:19,624 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 10:45:19,626 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 10:45:19,639 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 10:45:19,641 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 10:45:19,644 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 10:45:19,645 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 10:45:19,646 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 10:45:19,646 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 10:45:19,647 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 10:45:19,649 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 10:45:19,650 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 10:45:19,651 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 10:45:19,651 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 10:45:19,653 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 10:45:19,655 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 10:45:19,656 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 10:45:19,657 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 10:45:19,658 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 10:45:19,659 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 10:45:19,662 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 10:45:19,669 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 10:45:19,670 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 10:45:19,671 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 10:45:19,672 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 10:45:19,686 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 10:45:19,686 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 10:45:19,687 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 10:45:19,688 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 10:45:19,688 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 10:45:19,688 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 10:45:19,688 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 10:45:19,688 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 10:45:19,689 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 10:45:19,689 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 10:45:19,689 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 10:45:19,689 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 10:45:19,689 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 10:45:19,690 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 10:45:19,690 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 10:45:19,690 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 10:45:19,690 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 10:45:19,690 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 10:45:19,691 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 10:45:19,691 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 10:45:19,691 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 10:45:19,691 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 10:45:19,691 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 10:45:19,692 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 10:45:19,692 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 10:45:19,692 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 10:45:19,692 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:45:19,692 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 10:45:19,693 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 10:45:19,693 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> NOT_INCREMENTALLY [2020-07-20 10:45:19,973 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 10:45:19,987 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 10:45:19,990 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 10:45:19,992 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 10:45:19,992 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 10:45:19,993 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1052d.c [2020-07-20 10:45:20,069 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/528c0cb6c/dbacedbe57c04edc8390cbc20a21a314/FLAGc767e9df4 [2020-07-20 10:45:20,567 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 10:45:20,568 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_1052d.c [2020-07-20 10:45:20,578 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/528c0cb6c/dbacedbe57c04edc8390cbc20a21a314/FLAGc767e9df4 [2020-07-20 10:45:20,919 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/528c0cb6c/dbacedbe57c04edc8390cbc20a21a314 [2020-07-20 10:45:20,929 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 10:45:20,932 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 10:45:20,933 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 10:45:20,933 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 10:45:20,937 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 10:45:20,938 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:45:20" (1/1) ... [2020-07-20 10:45:20,941 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@423f00c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:20, skipping insertion in model container [2020-07-20 10:45:20,941 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:45:20" (1/1) ... [2020-07-20 10:45:20,949 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 10:45:20,971 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 10:45:21,156 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 10:45:21,161 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 10:45:21,195 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 10:45:21,329 INFO L208 MainTranslator]: Completed translation [2020-07-20 10:45:21,329 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:21 WrapperNode [2020-07-20 10:45:21,330 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 10:45:21,330 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 10:45:21,331 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 10:45:21,331 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 10:45:21,346 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:21" (1/1) ... [2020-07-20 10:45:21,348 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:21" (1/1) ... [2020-07-20 10:45:21,371 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:21" (1/1) ... [2020-07-20 10:45:21,372 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:21" (1/1) ... [2020-07-20 10:45:21,396 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:21" (1/1) ... [2020-07-20 10:45:21,406 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:21" (1/1) ... [2020-07-20 10:45:21,413 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:21" (1/1) ... [2020-07-20 10:45:21,422 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 10:45:21,422 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 10:45:21,423 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 10:45:21,423 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 10:45:21,424 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:21" (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 [2020-07-20 10:45:21,489 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 10:45:21,489 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 10:45:21,490 INFO L138 BoogieDeclarations]: Found implementation of procedure floor_float [2020-07-20 10:45:21,490 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_float [2020-07-20 10:45:21,490 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 10:45:21,490 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 10:45:21,490 INFO L130 BoogieDeclarations]: Found specification of procedure floor_float [2020-07-20 10:45:21,491 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 10:45:21,491 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-07-20 10:45:21,491 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 10:45:21,492 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 10:45:21,492 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 10:45:21,493 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-07-20 10:45:21,493 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_float [2020-07-20 10:45:21,493 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 10:45:21,494 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 10:45:21,494 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 10:45:21,892 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 10:45:21,893 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-07-20 10:45:21,897 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:45:21 BoogieIcfgContainer [2020-07-20 10:45:21,897 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 10:45:21,901 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 10:45:21,902 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 10:45:21,905 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 10:45:21,905 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 10:45:20" (1/3) ... [2020-07-20 10:45:21,906 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c7abd22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:45:21, skipping insertion in model container [2020-07-20 10:45:21,907 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:21" (2/3) ... [2020-07-20 10:45:21,907 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c7abd22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:45:21, skipping insertion in model container [2020-07-20 10:45:21,907 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:45:21" (3/3) ... [2020-07-20 10:45:21,910 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_1052d.c [2020-07-20 10:45:21,919 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 10:45:21,927 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 10:45:21,937 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 10:45:21,961 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 10:45:21,961 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 10:45:21,961 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 10:45:21,962 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 10:45:21,962 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 10:45:21,962 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 10:45:21,962 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 10:45:21,963 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 10:45:21,982 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states. [2020-07-20 10:45:21,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-20 10:45:21,989 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:45:21,990 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:45:21,990 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:45:21,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:45:21,997 INFO L82 PathProgramCache]: Analyzing trace with hash -2053199230, now seen corresponding path program 1 times [2020-07-20 10:45:22,006 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:45:22,006 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1933044998] [2020-07-20 10:45:22,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:45:22,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:45:22,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-20 10:45:22,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:45:22,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 10:45:22,148 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 10:45:22,150 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1933044998] [2020-07-20 10:45:22,151 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 10:45:22,152 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-20 10:45:22,153 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121422847] [2020-07-20 10:45:22,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-20 10:45:22,159 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:45:22,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-20 10:45:22,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 10:45:22,176 INFO L87 Difference]: Start difference. First operand 43 states. Second operand 2 states. [2020-07-20 10:45:22,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:45:22,205 INFO L93 Difference]: Finished difference Result 78 states and 111 transitions. [2020-07-20 10:45:22,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 10:45:22,207 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 18 [2020-07-20 10:45:22,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:45:22,218 INFO L225 Difference]: With dead ends: 78 [2020-07-20 10:45:22,218 INFO L226 Difference]: Without dead ends: 39 [2020-07-20 10:45:22,222 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 10:45:22,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-20 10:45:22,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-07-20 10:45:22,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-20 10:45:22,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 48 transitions. [2020-07-20 10:45:22,267 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 48 transitions. Word has length 18 [2020-07-20 10:45:22,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:45:22,268 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 48 transitions. [2020-07-20 10:45:22,268 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-20 10:45:22,268 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 48 transitions. [2020-07-20 10:45:22,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-20 10:45:22,269 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:45:22,270 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:45:22,479 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:45:22,480 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:45:22,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:45:22,481 INFO L82 PathProgramCache]: Analyzing trace with hash 2027240245, now seen corresponding path program 1 times [2020-07-20 10:45:22,482 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:45:22,482 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1782169622] [2020-07-20 10:45:22,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:45:22,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 10:45:22,582 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 10:45:22,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 10:45:22,616 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 10:45:22,670 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-20 10:45:22,670 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 10:45:22,889 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:45:22,919 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 10:45:22 BoogieIcfgContainer [2020-07-20 10:45:22,919 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 10:45:22,922 INFO L168 Benchmark]: Toolchain (without parser) took 1990.88 ms. Allocated memory was 137.4 MB in the beginning and 204.5 MB in the end (delta: 67.1 MB). Free memory was 101.8 MB in the beginning and 121.1 MB in the end (delta: -19.3 MB). Peak memory consumption was 47.8 MB. Max. memory is 7.1 GB. [2020-07-20 10:45:22,923 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 137.4 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-20 10:45:22,925 INFO L168 Benchmark]: CACSL2BoogieTranslator took 397.24 ms. Allocated memory was 137.4 MB in the beginning and 204.5 MB in the end (delta: 67.1 MB). Free memory was 101.4 MB in the beginning and 183.4 MB in the end (delta: -82.0 MB). Peak memory consumption was 24.5 MB. Max. memory is 7.1 GB. [2020-07-20 10:45:22,926 INFO L168 Benchmark]: Boogie Preprocessor took 91.50 ms. Allocated memory is still 204.5 MB. Free memory was 183.4 MB in the beginning and 181.0 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. [2020-07-20 10:45:22,926 INFO L168 Benchmark]: RCFGBuilder took 475.02 ms. Allocated memory is still 204.5 MB. Free memory was 181.0 MB in the beginning and 160.0 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 7.1 GB. [2020-07-20 10:45:22,927 INFO L168 Benchmark]: TraceAbstraction took 1018.07 ms. Allocated memory is still 204.5 MB. Free memory was 159.4 MB in the beginning and 121.1 MB in the end (delta: 38.2 MB). Peak memory consumption was 38.2 MB. Max. memory is 7.1 GB. [2020-07-20 10:45:22,932 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 137.4 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 397.24 ms. Allocated memory was 137.4 MB in the beginning and 204.5 MB in the end (delta: 67.1 MB). Free memory was 101.4 MB in the beginning and 183.4 MB in the end (delta: -82.0 MB). Peak memory consumption was 24.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 91.50 ms. Allocated memory is still 204.5 MB. Free memory was 183.4 MB in the beginning and 181.0 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 475.02 ms. Allocated memory is still 204.5 MB. Free memory was 181.0 MB in the beginning and 160.0 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1018.07 ms. Allocated memory is still 204.5 MB. Free memory was 159.4 MB in the beginning and 121.1 MB in the end (delta: 38.2 MB). Peak memory consumption was 38.2 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 21, overapproximation of someBinaryArithmeticFLOAToperation at line 44. Possible FailurePath: [L11] static const float huge_floor = 1.0e30; VAL [\old(huge_floor)=1, huge_floor=1000000000000000000000000000000] [L75] float x = 0.0f; VAL [huge_floor=1000000000000000000000000000000, x=0] [L76] CALL, EXPR floor_float(x) VAL [\old(x)=0, huge_floor=1000000000000000000000000000000] [L14] __int32_t i0, j0; [L15] __uint32_t i, ix; VAL [\old(x)=0, huge_floor=1000000000000000000000000000000, x=0] [L17] ieee_float_shape_type gf_u; [L18] gf_u.value = (x) [L19] EXPR gf_u.word [L19] (i0) = gf_u.word [L21] ix = (i0 & 0x7fffffff) [L22] j0 = (ix >> 23) - 0x7f VAL [\old(x)=0, huge_floor=1000000000000000000000000000000, i=-72057589742960641, i0=0, j0=384, x=0] [L23] COND FALSE !(j0 < 23) VAL [\old(x)=0, huge_floor=1000000000000000000000000000000, i=-72057589742960641, i0=0, j0=384, x=0] [L43] COND TRUE !((ix) < 0x7f800000L) [L44] return x + x; VAL [\old(x)=0, huge_floor=1000000000000000000000000000000, i=-72057589742960641, i0=0, j0=384, x=0] [L76] RET, EXPR floor_float(x) VAL [floor_float(x)=5, huge_floor=1000000000000000000000000000000, x=0] [L76] float res = floor_float(x); [L79] EXPR res == 0.0f && __signbit_float(res) == 0 VAL [huge_floor=1000000000000000000000000000000, res=5, res == 0.0f && __signbit_float(res) == 0=0, x=0] [L79] COND TRUE !(res == 0.0f && __signbit_float(res) == 0) [L80] __VERIFIER_error() VAL [huge_floor=1000000000000000000000000000000, res=5, x=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 43 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.9s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 52 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 17 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=43occurred 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, 0.0s InterpolantComputationTime, 37 NumberOfCodeBlocks, 37 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 17 ConstructedInterpolants, 0 QuantifiedInterpolants, 289 SizeOfPredicates, 0 NumberOfNonLiveVariables, 63 ConjunctsInSsa, 1 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...