/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_1071.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 21:36:55,017 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 21:36:55,021 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 21:36:55,068 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 21:36:55,068 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 21:36:55,079 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 21:36:55,081 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 21:36:55,086 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 21:36:55,088 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 21:36:55,092 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 21:36:55,093 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 21:36:55,094 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 21:36:55,095 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 21:36:55,096 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 21:36:55,097 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 21:36:55,101 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 21:36:55,102 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 21:36:55,103 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 21:36:55,106 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 21:36:55,110 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 21:36:55,115 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 21:36:55,116 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 21:36:55,117 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 21:36:55,120 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 21:36:55,125 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-04 21:36:55,132 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-04 21:36:55,132 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-04 21:36:55,133 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-04 21:36:55,135 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-04 21:36:55,136 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-04 21:36:55,136 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-04 21:36:55,137 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-04 21:36:55,137 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-04 21:36:55,137 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 21:36:55,139 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 21:36:55,140 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 21:36:55,141 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-09-04 21:36:55,159 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 21:36:55,159 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 21:36:55,161 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 21:36:55,161 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 21:36:55,162 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 21:36:55,162 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 21:36:55,162 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 21:36:55,162 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 21:36:55,163 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 21:36:55,163 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 21:36:55,164 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 21:36:55,164 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 21:36:55,164 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 21:36:55,165 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 21:36:55,165 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 21:36:55,165 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-09-04 21:36:55,165 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 21:36:55,166 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 21:36:55,166 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 21:36:55,166 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 21:36:55,167 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-09-04 21:36:55,167 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 21:36:55,167 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 [2020-09-04 21:36:55,593 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 21:36:55,618 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 21:36:55,622 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 21:36:55,624 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 21:36:55,625 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 21:36:55,626 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1071.c [2020-09-04 21:36:55,712 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bb411c995/5419c2fcc0f446b9920d0dd9df83f6d9/FLAG573b207ed [2020-09-04 21:36:56,221 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 21:36:56,222 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-newlib/float_req_bl_1071.c [2020-09-04 21:36:56,230 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bb411c995/5419c2fcc0f446b9920d0dd9df83f6d9/FLAG573b207ed [2020-09-04 21:36:56,563 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bb411c995/5419c2fcc0f446b9920d0dd9df83f6d9 [2020-09-04 21:36:56,578 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 21:36:56,580 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 21:36:56,582 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 21:36:56,582 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 21:36:56,586 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 21:36:56,587 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 09:36:56" (1/1) ... [2020-09-04 21:36:56,591 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67f72d40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 09:36:56, skipping insertion in model container [2020-09-04 21:36:56,592 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 09:36:56" (1/1) ... [2020-09-04 21:36:56,600 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 21:36:56,627 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 21:36:56,843 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 21:36:56,848 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 21:36:56,878 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 21:36:56,903 INFO L208 MainTranslator]: Completed translation [2020-09-04 21:36:56,903 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 09:36:56 WrapperNode [2020-09-04 21:36:56,904 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 21:36:56,904 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 21:36:56,904 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 21:36:56,905 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 21:36:56,995 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 09:36:56" (1/1) ... [2020-09-04 21:36:56,995 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 09:36:56" (1/1) ... [2020-09-04 21:36:57,008 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 09:36:56" (1/1) ... [2020-09-04 21:36:57,008 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 09:36:56" (1/1) ... [2020-09-04 21:36:57,024 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 09:36:56" (1/1) ... [2020-09-04 21:36:57,032 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 09:36:56" (1/1) ... [2020-09-04 21:36:57,034 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 09:36:56" (1/1) ... [2020-09-04 21:36:57,036 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 21:36:57,037 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 21:36:57,037 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 21:36:57,037 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 21:36:57,038 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 09:36:56" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 21:36:57,120 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 21:36:57,120 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 21:36:57,121 INFO L138 BoogieDeclarations]: Found implementation of procedure trunc_float [2020-09-04 21:36:57,121 INFO L138 BoogieDeclarations]: Found implementation of procedure isnan_float [2020-09-04 21:36:57,121 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 21:36:57,121 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 21:36:57,121 INFO L130 BoogieDeclarations]: Found specification of procedure trunc_float [2020-09-04 21:36:57,121 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-04 21:36:57,122 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-09-04 21:36:57,122 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-04 21:36:57,122 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-04 21:36:57,122 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-04 21:36:57,122 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-09-04 21:36:57,123 INFO L130 BoogieDeclarations]: Found specification of procedure isnan_float [2020-09-04 21:36:57,123 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 21:36:57,123 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 21:36:57,123 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 21:36:57,497 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 21:36:57,497 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-09-04 21:36:57,502 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 09:36:57 BoogieIcfgContainer [2020-09-04 21:36:57,502 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 21:36:57,504 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 21:36:57,504 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 21:36:57,508 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 21:36:57,508 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 09:36:56" (1/3) ... [2020-09-04 21:36:57,509 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20a7e7eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 09:36:57, skipping insertion in model container [2020-09-04 21:36:57,509 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 09:36:56" (2/3) ... [2020-09-04 21:36:57,510 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20a7e7eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 09:36:57, skipping insertion in model container [2020-09-04 21:36:57,510 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 09:36:57" (3/3) ... [2020-09-04 21:36:57,512 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_1071.c [2020-09-04 21:36:57,523 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-04 21:36:57,534 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 21:36:57,556 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 21:36:57,578 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 21:36:57,578 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 21:36:57,579 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-04 21:36:57,579 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 21:36:57,579 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 21:36:57,579 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 21:36:57,579 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 21:36:57,579 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 21:36:57,598 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states. [2020-09-04 21:36:57,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-04 21:36:57,610 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:36:57,611 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] [2020-09-04 21:36:57,612 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:36:57,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:36:57,618 INFO L82 PathProgramCache]: Analyzing trace with hash 641961910, now seen corresponding path program 1 times [2020-09-04 21:36:57,630 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:36:57,631 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2048341975] [2020-09-04 21:36:57,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:36:57,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:36:57,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:36:57,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:36:57,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-04 21:36:57,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:36:57,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-04 21:36:57,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:36:57,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 21:36:57,881 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2048341975] [2020-09-04 21:36:57,883 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 21:36:57,884 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 21:36:57,885 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931057021] [2020-09-04 21:36:57,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 21:36:57,892 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:36:57,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 21:36:57,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 21:36:57,913 INFO L87 Difference]: Start difference. First operand 71 states. Second operand 4 states. [2020-09-04 21:36:58,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:36:58,164 INFO L93 Difference]: Finished difference Result 128 states and 146 transitions. [2020-09-04 21:36:58,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 21:36:58,166 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2020-09-04 21:36:58,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:36:58,180 INFO L225 Difference]: With dead ends: 128 [2020-09-04 21:36:58,180 INFO L226 Difference]: Without dead ends: 64 [2020-09-04 21:36:58,185 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-04 21:36:58,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-09-04 21:36:58,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-09-04 21:36:58,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-04 21:36:58,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2020-09-04 21:36:58,244 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 32 [2020-09-04 21:36:58,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:36:58,245 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2020-09-04 21:36:58,245 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 21:36:58,245 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2020-09-04 21:36:58,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-04 21:36:58,247 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:36:58,248 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 21:36:58,248 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 21:36:58,248 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:36:58,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:36:58,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1381088133, now seen corresponding path program 1 times [2020-09-04 21:36:58,249 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:36:58,250 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1549425960] [2020-09-04 21:36:58,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:36:58,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 21:36:58,318 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 21:36:58,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 21:36:58,359 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 21:36:58,393 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-04 21:36:58,393 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-04 21:36:58,395 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 21:36:58,452 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 09:36:58 BoogieIcfgContainer [2020-09-04 21:36:58,452 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 21:36:58,462 INFO L168 Benchmark]: Toolchain (without parser) took 1880.04 ms. Allocated memory was 140.5 MB in the beginning and 203.9 MB in the end (delta: 63.4 MB). Free memory was 105.1 MB in the beginning and 107.4 MB in the end (delta: -2.3 MB). Peak memory consumption was 61.2 MB. Max. memory is 7.1 GB. [2020-09-04 21:36:58,463 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 140.5 MB. Free memory was 123.0 MB in the beginning and 122.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-04 21:36:58,465 INFO L168 Benchmark]: CACSL2BoogieTranslator took 322.33 ms. Allocated memory is still 140.5 MB. Free memory was 104.9 MB in the beginning and 94.2 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. [2020-09-04 21:36:58,467 INFO L168 Benchmark]: Boogie Preprocessor took 132.17 ms. Allocated memory was 140.5 MB in the beginning and 203.9 MB in the end (delta: 63.4 MB). Free memory was 94.2 MB in the beginning and 181.2 MB in the end (delta: -87.1 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. [2020-09-04 21:36:58,468 INFO L168 Benchmark]: RCFGBuilder took 465.72 ms. Allocated memory is still 203.9 MB. Free memory was 181.2 MB in the beginning and 160.3 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 7.1 GB. [2020-09-04 21:36:58,470 INFO L168 Benchmark]: TraceAbstraction took 948.59 ms. Allocated memory is still 203.9 MB. Free memory was 159.6 MB in the beginning and 107.4 MB in the end (delta: 52.2 MB). Peak memory consumption was 52.2 MB. Max. memory is 7.1 GB. [2020-09-04 21:36:58,478 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 140.5 MB. Free memory was 123.0 MB in the beginning and 122.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 322.33 ms. Allocated memory is still 140.5 MB. Free memory was 104.9 MB in the beginning and 94.2 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 132.17 ms. Allocated memory was 140.5 MB in the beginning and 203.9 MB in the end (delta: 63.4 MB). Free memory was 94.2 MB in the beginning and 181.2 MB in the end (delta: -87.1 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 465.72 ms. Allocated memory is still 203.9 MB. Free memory was 181.2 MB in the beginning and 160.3 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 948.59 ms. Allocated memory is still 203.9 MB. Free memory was 159.6 MB in the beginning and 107.4 MB in the end (delta: 52.2 MB). Peak memory consumption was 52.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 57]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 44, overapproximation of someBinaryArithmeticFLOAToperation at line 38, overapproximation of bitwiseAnd at line 20. Possible FailurePath: [L52] float x = 0.0f / 0.0f; [L53] CALL, EXPR trunc_float(x) VAL [\old(x)=4294967299] [L13] __int32_t signbit, w, exponent_less_127; VAL [\old(x)=4294967299, x=4294967299] [L15] ieee_float_shape_type gf_u; VAL [\old(x)=4294967299, gf_u={2:0}, x=4294967299] [L16] gf_u.value = (x) VAL [\old(x)=4294967299, gf_u={2:0}, x=4294967299] [L17] EXPR gf_u.word VAL [\old(x)=4294967299, gf_u={2:0}, gf_u.word=4294967294, x=4294967299] [L17] (w) = gf_u.word VAL [(w) = gf_u.word=4294967300, \old(x)=4294967299, gf_u={2:0}, gf_u.word=4294967294, w=-2, x=4294967299] [L19] signbit = w & 0x80000000 VAL [\old(x)=4294967299, signbit=-1, w=-2, x=4294967299] [L20] exponent_less_127 = ((w & 0x7f800000) >> 23) - 127 VAL [\old(x)=4294967299, exponent_less_127=255, signbit=-1, w=-2, x=4294967299] [L21] COND FALSE !(exponent_less_127 < 23) VAL [\old(x)=4294967299, exponent_less_127=255, signbit=-1, w=-2, x=4294967299] [L37] COND TRUE exponent_less_127 == 255 VAL [\old(x)=4294967299, exponent_less_127=255, signbit=-1, w=-2, x=4294967299] [L38] return x + x; VAL [\old(x)=4294967299, exponent_less_127=255, signbit=-1, w=-2, x=4294967299] [L53] RET, EXPR trunc_float(x) VAL [trunc_float(x)=4294967301, x=4294967299] [L53] float res = trunc_float(x); VAL [res=4294967301, trunc_float(x)=4294967301, x=4294967299] [L56] CALL, EXPR isnan_float(res) VAL [\old(x)=4294967301] [L44] return x != x; VAL [\old(x)=4294967301, \result=0, x=4294967301] [L56] RET, EXPR isnan_float(res) VAL [isnan_float(res)=0, res=4294967301, x=4294967299] [L56] COND TRUE !isnan_float(res) VAL [isnan_float(res)=0, res=4294967301, x=4294967299] [L57] __VERIFIER_error() VAL [res=4294967301, x=4294967299] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 71 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.8s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 70 SDtfs, 17 SDslu, 44 SDs, 0 SdLazy, 77 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=71occurred 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, 73 NumberOfCodeBlocks, 73 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 31 ConstructedInterpolants, 0 QuantifiedInterpolants, 1612 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...