/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 0.1.25-3af5e1f [2020-09-04 16:11:11,892 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 16:11:11,897 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 16:11:11,943 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 16:11:11,943 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 16:11:11,944 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 16:11:11,946 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 16:11:11,948 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 16:11:11,950 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 16:11:11,951 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 16:11:11,952 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 16:11:11,954 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 16:11:11,954 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 16:11:11,955 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 16:11:11,957 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 16:11:11,958 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 16:11:11,959 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 16:11:11,960 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 16:11:11,962 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 16:11:11,964 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 16:11:11,966 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 16:11:11,967 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 16:11:11,969 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 16:11:11,970 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 16:11:11,972 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-04 16:11:11,973 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-04 16:11:11,973 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-04 16:11:11,974 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-04 16:11:11,974 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-04 16:11:11,976 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-04 16:11:11,976 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-04 16:11:11,977 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-04 16:11:11,978 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-04 16:11:11,979 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-04 16:11:11,980 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-04 16:11:11,980 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-04 16:11:11,981 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-04 16:11:11,981 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-04 16:11:11,981 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 16:11:11,983 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 16:11:11,986 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 16:11:11,987 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 16:11:12,003 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 16:11:12,003 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 16:11:12,005 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 16:11:12,005 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 16:11:12,006 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 16:11:12,006 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 16:11:12,007 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 16:11:12,007 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 16:11:12,007 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 16:11:12,007 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 16:11:12,007 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 16:11:12,008 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 16:11:12,008 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 16:11:12,008 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 16:11:12,008 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 16:11:12,008 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-09-04 16:11:12,010 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 16:11:12,010 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 16:11:12,010 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 16:11:12,010 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 16:11:12,011 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-09-04 16:11:12,011 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 16:11:12,011 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-09-04 16:11:12,442 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 16:11:12,460 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 16:11:12,465 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 16:11:12,466 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 16:11:12,467 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 16:11:12,468 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1032b.c [2020-09-04 16:11:12,564 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/63e1dc4c6/857c56a2876f4ff0b3ff3bb16e90e8fa/FLAGb8506d671 [2020-09-04 16:11:13,116 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 16:11:13,118 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-newlib/float_req_bl_1032b.c [2020-09-04 16:11:13,128 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/63e1dc4c6/857c56a2876f4ff0b3ff3bb16e90e8fa/FLAGb8506d671 [2020-09-04 16:11:13,458 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/63e1dc4c6/857c56a2876f4ff0b3ff3bb16e90e8fa [2020-09-04 16:11:13,472 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 16:11:13,474 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 16:11:13,475 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 16:11:13,475 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 16:11:13,479 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 16:11:13,481 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 04:11:13" (1/1) ... [2020-09-04 16:11:13,485 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d852c66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:11:13, skipping insertion in model container [2020-09-04 16:11:13,485 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 04:11:13" (1/1) ... [2020-09-04 16:11:13,493 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 16:11:13,516 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 16:11:13,741 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 16:11:13,746 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 16:11:13,781 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 16:11:13,809 INFO L208 MainTranslator]: Completed translation [2020-09-04 16:11:13,809 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:11:13 WrapperNode [2020-09-04 16:11:13,809 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 16:11:13,810 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 16:11:13,811 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 16:11:13,811 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 16:11:13,929 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:11:13" (1/1) ... [2020-09-04 16:11:13,929 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:11:13" (1/1) ... [2020-09-04 16:11:13,941 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:11:13" (1/1) ... [2020-09-04 16:11:13,941 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:11:13" (1/1) ... [2020-09-04 16:11:13,955 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:11:13" (1/1) ... [2020-09-04 16:11:13,965 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:11:13" (1/1) ... [2020-09-04 16:11:13,974 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:11:13" (1/1) ... [2020-09-04 16:11:13,980 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 16:11:13,980 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 16:11:13,984 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 16:11:13,984 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 16:11:13,985 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:11:13" (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 16:11:14,055 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 16:11:14,055 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 16:11:14,055 INFO L138 BoogieDeclarations]: Found implementation of procedure round_float [2020-09-04 16:11:14,056 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_float [2020-09-04 16:11:14,056 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 16:11:14,056 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 16:11:14,056 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2020-09-04 16:11:14,057 INFO L130 BoogieDeclarations]: Found specification of procedure round_float [2020-09-04 16:11:14,057 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-04 16:11:14,057 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-09-04 16:11:14,057 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-04 16:11:14,058 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-04 16:11:14,058 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-04 16:11:14,058 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-09-04 16:11:14,058 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_float [2020-09-04 16:11:14,059 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 16:11:14,059 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 16:11:14,059 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 16:11:14,495 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 16:11:14,496 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-09-04 16:11:14,501 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 04:11:14 BoogieIcfgContainer [2020-09-04 16:11:14,502 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 16:11:14,503 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 16:11:14,503 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 16:11:14,507 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 16:11:14,507 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 04:11:13" (1/3) ... [2020-09-04 16:11:14,508 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5997bd0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 04:11:14, skipping insertion in model container [2020-09-04 16:11:14,508 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:11:13" (2/3) ... [2020-09-04 16:11:14,509 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5997bd0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 04:11:14, skipping insertion in model container [2020-09-04 16:11:14,509 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 04:11:14" (3/3) ... [2020-09-04 16:11:14,512 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_1032b.c [2020-09-04 16:11:14,524 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-04 16:11:14,534 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 16:11:14,557 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 16:11:14,584 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 16:11:14,584 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 16:11:14,584 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-09-04 16:11:14,584 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 16:11:14,584 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 16:11:14,585 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 16:11:14,585 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 16:11:14,585 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 16:11:14,603 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states. [2020-09-04 16:11:14,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-04 16:11:14,616 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:11:14,617 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] [2020-09-04 16:11:14,617 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:11:14,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:11:14,625 INFO L82 PathProgramCache]: Analyzing trace with hash -1398005522, now seen corresponding path program 1 times [2020-09-04 16:11:14,635 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:11:14,635 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [513025201] [2020-09-04 16:11:14,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:11:14,703 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:11:14,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:11:14,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:11:14,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:11:14,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-04 16:11:14,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:11:14,907 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 16:11:14,910 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [513025201] [2020-09-04 16:11:14,912 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:11:14,912 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 16:11:14,913 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654639984] [2020-09-04 16:11:14,922 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 16:11:14,922 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:11:14,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 16:11:14,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 16:11:14,943 INFO L87 Difference]: Start difference. First operand 84 states. Second operand 4 states. [2020-09-04 16:11:15,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:11:15,198 INFO L93 Difference]: Finished difference Result 155 states and 180 transitions. [2020-09-04 16:11:15,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 16:11:15,200 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-09-04 16:11:15,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:11:15,214 INFO L225 Difference]: With dead ends: 155 [2020-09-04 16:11:15,214 INFO L226 Difference]: Without dead ends: 76 [2020-09-04 16:11:15,220 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-04 16:11:15,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-09-04 16:11:15,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2020-09-04 16:11:15,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-04 16:11:15,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 81 transitions. [2020-09-04 16:11:15,283 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 81 transitions. Word has length 27 [2020-09-04 16:11:15,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:11:15,284 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 81 transitions. [2020-09-04 16:11:15,284 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 16:11:15,284 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 81 transitions. [2020-09-04 16:11:15,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-04 16:11:15,286 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:11:15,286 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] [2020-09-04 16:11:15,287 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 16:11:15,287 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:11:15,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:11:15,288 INFO L82 PathProgramCache]: Analyzing trace with hash -687584586, now seen corresponding path program 1 times [2020-09-04 16:11:15,288 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:11:15,289 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1323003804] [2020-09-04 16:11:15,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:11:15,291 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:11:15,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 16:11:15,362 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 16:11:15,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 16:11:15,395 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 16:11:15,433 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-04 16:11:15,433 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-04 16:11:15,434 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 16:11:15,456 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 04:11:15 BoogieIcfgContainer [2020-09-04 16:11:15,457 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 16:11:15,460 INFO L168 Benchmark]: Toolchain (without parser) took 1984.95 ms. Allocated memory was 139.5 MB in the beginning and 205.0 MB in the end (delta: 65.5 MB). Free memory was 102.1 MB in the beginning and 104.9 MB in the end (delta: -2.8 MB). Peak memory consumption was 62.8 MB. Max. memory is 7.1 GB. [2020-09-04 16:11:15,461 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 139.5 MB. Free memory was 120.5 MB in the beginning and 120.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-04 16:11:15,462 INFO L168 Benchmark]: CACSL2BoogieTranslator took 335.05 ms. Allocated memory is still 139.5 MB. Free memory was 101.9 MB in the beginning and 90.9 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. [2020-09-04 16:11:15,463 INFO L168 Benchmark]: Boogie Preprocessor took 169.71 ms. Allocated memory was 139.5 MB in the beginning and 205.0 MB in the end (delta: 65.5 MB). Free memory was 90.9 MB in the beginning and 182.3 MB in the end (delta: -91.4 MB). Peak memory consumption was 13.4 MB. Max. memory is 7.1 GB. [2020-09-04 16:11:15,464 INFO L168 Benchmark]: RCFGBuilder took 521.30 ms. Allocated memory is still 205.0 MB. Free memory was 182.3 MB in the beginning and 159.2 MB in the end (delta: 23.0 MB). Peak memory consumption was 23.0 MB. Max. memory is 7.1 GB. [2020-09-04 16:11:15,465 INFO L168 Benchmark]: TraceAbstraction took 953.63 ms. Allocated memory is still 205.0 MB. Free memory was 158.6 MB in the beginning and 104.9 MB in the end (delta: 53.7 MB). Peak memory consumption was 53.7 MB. Max. memory is 7.1 GB. [2020-09-04 16:11:15,470 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 139.5 MB. Free memory was 120.5 MB in the beginning and 120.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 335.05 ms. Allocated memory is still 139.5 MB. Free memory was 101.9 MB in the beginning and 90.9 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 169.71 ms. Allocated memory was 139.5 MB in the beginning and 205.0 MB in the end (delta: 65.5 MB). Free memory was 90.9 MB in the beginning and 182.3 MB in the end (delta: -91.4 MB). Peak memory consumption was 13.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 521.30 ms. Allocated memory is still 205.0 MB. Free memory was 182.3 MB in the beginning and 159.2 MB in the end (delta: 23.0 MB). Peak memory consumption was 23.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 953.63 ms. Allocated memory is still 205.0 MB. Free memory was 158.6 MB in the beginning and 104.9 MB in the end (delta: 53.7 MB). Peak memory consumption was 53.7 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: 0.8s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.2s, 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, 9 GetRequests, 6 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...