/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.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/float-newlib/float_req_bl_1130a.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 23:45:03,423 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 23:45:03,426 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 23:45:03,460 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 23:45:03,462 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 23:45:03,474 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 23:45:03,476 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 23:45:03,479 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 23:45:03,481 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 23:45:03,483 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 23:45:03,485 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 23:45:03,487 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 23:45:03,487 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 23:45:03,491 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 23:45:03,494 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 23:45:03,496 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 23:45:03,498 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 23:45:03,499 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 23:45:03,500 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 23:45:03,508 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 23:45:03,510 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 23:45:03,511 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 23:45:03,512 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 23:45:03,513 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 23:45:03,517 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 23:45:03,518 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 23:45:03,518 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 23:45:03,521 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 23:45:03,522 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 23:45:03,524 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 23:45:03,524 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 23:45:03,525 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 23:45:03,526 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 23:45:03,526 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 23:45:03,527 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 23:45:03,528 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 23:45:03,528 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 23:45:03,529 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 23:45:03,529 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 23:45:03,530 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 23:45:03,531 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 23:45:03,532 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 23:45:03,579 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 23:45:03,579 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 23:45:03,580 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 23:45:03,581 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 23:45:03,581 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 23:45:03,581 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 23:45:03,581 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 23:45:03,582 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 23:45:03,582 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 23:45:03,582 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 23:45:03,582 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 23:45:03,583 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 23:45:03,583 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 23:45:03,583 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 23:45:03,583 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 23:45:03,583 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 23:45:03,584 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 23:45:03,584 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 23:45:03,584 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 23:45:03,584 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 23:45:03,584 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 23:45:03,585 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 23:45:03,585 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 23:45:03,585 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 23:45:03,585 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 23:45:03,586 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 23:45:03,586 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 23:45:03,586 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 23:45:03,586 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 23:45:03,586 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 -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true; [2020-08-21 23:45:03,938 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 23:45:03,957 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 23:45:03,963 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 23:45:03,965 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 23:45:03,967 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 23:45:03,968 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1130a.c [2020-08-21 23:45:04,033 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b8538984d/b314e7d076334c2f92bc21aaf0c716d4/FLAG51ba19073 [2020-08-21 23:45:04,505 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 23:45:04,506 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-newlib/float_req_bl_1130a.c [2020-08-21 23:45:04,517 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b8538984d/b314e7d076334c2f92bc21aaf0c716d4/FLAG51ba19073 [2020-08-21 23:45:04,878 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b8538984d/b314e7d076334c2f92bc21aaf0c716d4 [2020-08-21 23:45:04,889 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 23:45:04,891 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 23:45:04,897 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 23:45:04,897 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 23:45:04,901 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 23:45:04,902 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 11:45:04" (1/1) ... [2020-08-21 23:45:04,905 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@90d95a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:45:04, skipping insertion in model container [2020-08-21 23:45:04,906 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 11:45:04" (1/1) ... [2020-08-21 23:45:04,914 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 23:45:04,935 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 23:45:05,145 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 23:45:05,151 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 23:45:05,282 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 23:45:05,306 INFO L208 MainTranslator]: Completed translation [2020-08-21 23:45:05,307 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:45:05 WrapperNode [2020-08-21 23:45:05,307 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 23:45:05,308 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 23:45:05,308 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 23:45:05,308 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 23:45:05,321 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:45:05" (1/1) ... [2020-08-21 23:45:05,321 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:45:05" (1/1) ... [2020-08-21 23:45:05,332 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:45:05" (1/1) ... [2020-08-21 23:45:05,333 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:45:05" (1/1) ... [2020-08-21 23:45:05,348 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:45:05" (1/1) ... [2020-08-21 23:45:05,358 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:45:05" (1/1) ... [2020-08-21 23:45:05,361 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:45:05" (1/1) ... [2020-08-21 23:45:05,365 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 23:45:05,365 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 23:45:05,365 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 23:45:05,366 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 23:45:05,367 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:45:05" (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 [2020-08-21 23:45:05,423 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 23:45:05,423 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 23:45:05,423 INFO L138 BoogieDeclarations]: Found implementation of procedure fmod_float [2020-08-21 23:45:05,424 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_float [2020-08-21 23:45:05,424 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 23:45:05,424 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 23:45:05,424 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2020-08-21 23:45:05,424 INFO L130 BoogieDeclarations]: Found specification of procedure fmod_float [2020-08-21 23:45:05,424 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-21 23:45:05,424 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-08-21 23:45:05,425 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-21 23:45:05,425 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 23:45:05,425 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-08-21 23:45:05,425 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-21 23:45:05,425 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_float [2020-08-21 23:45:05,425 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 23:45:05,426 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 23:45:05,426 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real [2020-08-21 23:45:05,426 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 23:45:05,934 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 23:45:05,934 INFO L295 CfgBuilder]: Removed 14 assume(true) statements. [2020-08-21 23:45:05,939 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 11:45:05 BoogieIcfgContainer [2020-08-21 23:45:05,939 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 23:45:05,941 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 23:45:05,941 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 23:45:05,944 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 23:45:05,945 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 11:45:04" (1/3) ... [2020-08-21 23:45:05,946 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@178b22b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 11:45:05, skipping insertion in model container [2020-08-21 23:45:05,946 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:45:05" (2/3) ... [2020-08-21 23:45:05,947 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@178b22b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 11:45:05, skipping insertion in model container [2020-08-21 23:45:05,947 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 11:45:05" (3/3) ... [2020-08-21 23:45:05,949 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_1130a.c [2020-08-21 23:45:05,960 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 23:45:05,968 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 23:45:05,983 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 23:45:06,005 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 23:45:06,006 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 23:45:06,006 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 23:45:06,006 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 23:45:06,006 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 23:45:06,006 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 23:45:06,007 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 23:45:06,007 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 23:45:06,025 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states. [2020-08-21 23:45:06,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-21 23:45:06,032 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:45:06,033 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:45:06,033 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:45:06,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:45:06,038 INFO L82 PathProgramCache]: Analyzing trace with hash 1920116781, now seen corresponding path program 1 times [2020-08-21 23:45:06,045 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:45:06,045 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [24968532] [2020-08-21 23:45:06,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:45:06,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:06,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:45:06,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:06,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 23:45:06,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:06,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 23:45:06,359 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [24968532] [2020-08-21 23:45:06,361 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:45:06,361 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 23:45:06,362 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475231420] [2020-08-21 23:45:06,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 23:45:06,370 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:45:06,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 23:45:06,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 23:45:06,390 INFO L87 Difference]: Start difference. First operand 61 states. Second operand 4 states. [2020-08-21 23:45:06,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:45:06,679 INFO L93 Difference]: Finished difference Result 116 states and 180 transitions. [2020-08-21 23:45:06,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 23:45:06,682 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-08-21 23:45:06,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:45:06,694 INFO L225 Difference]: With dead ends: 116 [2020-08-21 23:45:06,694 INFO L226 Difference]: Without dead ends: 56 [2020-08-21 23:45:06,698 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-21 23:45:06,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-08-21 23:45:06,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-08-21 23:45:06,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-08-21 23:45:06,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 72 transitions. [2020-08-21 23:45:06,750 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 72 transitions. Word has length 19 [2020-08-21 23:45:06,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:45:06,750 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 72 transitions. [2020-08-21 23:45:06,751 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 23:45:06,751 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 72 transitions. [2020-08-21 23:45:06,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 23:45:06,752 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:45:06,752 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] [2020-08-21 23:45:06,753 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 23:45:06,753 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:45:06,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:45:06,754 INFO L82 PathProgramCache]: Analyzing trace with hash -2095475350, now seen corresponding path program 1 times [2020-08-21 23:45:06,754 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:45:06,755 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [44192836] [2020-08-21 23:45:06,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:45:06,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 23:45:06,843 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 23:45:06,844 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 23:45:06,851 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 23:45:06,895 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 11:45:06 BoogieIcfgContainer [2020-08-21 23:45:06,895 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 23:45:06,899 INFO L168 Benchmark]: Toolchain (without parser) took 2006.25 ms. Allocated memory was 140.5 MB in the beginning and 201.9 MB in the end (delta: 61.3 MB). Free memory was 102.2 MB in the beginning and 94.2 MB in the end (delta: 8.0 MB). Peak memory consumption was 69.3 MB. Max. memory is 7.1 GB. [2020-08-21 23:45:06,901 INFO L168 Benchmark]: CDTParser took 0.70 ms. Allocated memory is still 140.5 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-21 23:45:06,902 INFO L168 Benchmark]: CACSL2BoogieTranslator took 410.22 ms. Allocated memory was 140.5 MB in the beginning and 201.9 MB in the end (delta: 61.3 MB). Free memory was 102.0 MB in the beginning and 178.2 MB in the end (delta: -76.2 MB). Peak memory consumption was 22.5 MB. Max. memory is 7.1 GB. [2020-08-21 23:45:06,903 INFO L168 Benchmark]: Boogie Preprocessor took 57.28 ms. Allocated memory is still 201.9 MB. Free memory was 178.2 MB in the beginning and 175.7 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. [2020-08-21 23:45:06,905 INFO L168 Benchmark]: RCFGBuilder took 573.91 ms. Allocated memory is still 201.9 MB. Free memory was 175.7 MB in the beginning and 147.2 MB in the end (delta: 28.4 MB). Peak memory consumption was 28.4 MB. Max. memory is 7.1 GB. [2020-08-21 23:45:06,907 INFO L168 Benchmark]: TraceAbstraction took 954.89 ms. Allocated memory is still 201.9 MB. Free memory was 147.2 MB in the beginning and 94.2 MB in the end (delta: 53.0 MB). Peak memory consumption was 53.0 MB. Max. memory is 7.1 GB. [2020-08-21 23:45:06,917 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.70 ms. Allocated memory is still 140.5 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 410.22 ms. Allocated memory was 140.5 MB in the beginning and 201.9 MB in the end (delta: 61.3 MB). Free memory was 102.0 MB in the beginning and 178.2 MB in the end (delta: -76.2 MB). Peak memory consumption was 22.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 57.28 ms. Allocated memory is still 201.9 MB. Free memory was 178.2 MB in the beginning and 175.7 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 573.91 ms. Allocated memory is still 201.9 MB. Free memory was 175.7 MB in the beginning and 147.2 MB in the end (delta: 28.4 MB). Peak memory consumption was 28.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 954.89 ms. Allocated memory is still 201.9 MB. Free memory was 147.2 MB in the beginning and 94.2 MB in the end (delta: 53.0 MB). Peak memory consumption was 53.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 135]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 134, overapproximation of someUnaryDOUBLEoperation at line 14, overapproximation of bitwiseAnd at line 30, overapproximation of bitwiseXor at line 31, overapproximation of someBinaryArithmeticFLOAToperation at line 35. Possible FailurePath: [L12-L15] static const float one_fmod = 1.0, Zero_fmod[] = { 0.0, -0.0, }; [L126] float x = 0.0f; [L127] float y = __VERIFIER_nondet_float(); [L129] COND TRUE (y < 0.0f || y > 0.0f) [L131] CALL, EXPR fmod_float(x, y) [L18] __int32_t n, hx, hy, hz, ix, iy, sx, i; [L21] ieee_float_shape_type gf_u; [L22] gf_u.value = (x) [L23] EXPR gf_u.word [L23] (hx) = gf_u.word [L26] ieee_float_shape_type gf_u; [L27] gf_u.value = (y) [L28] EXPR gf_u.word [L28] (hy) = gf_u.word [L30] sx = hx & 0x80000000 [L31] hx ^= sx [L32] hy &= 0x7fffffff [L34] COND TRUE ((hy) == 0) || !((hx) < 0x7f800000L) || ((hy) > 0x7f800000L) [L35] return (x * y) / (x * y); [L131] RET, EXPR fmod_float(x, y) [L131] float res = fmod_float(x, y); [L134] EXPR res == 0.0f && __signbit_float(res) == 0 [L134] COND TRUE !(res == 0.0f && __signbit_float(res) == 0) [L135] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 61 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.8s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 75 SDtfs, 14 SDslu, 61 SDs, 0 SdLazy, 80 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, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=61occurred 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, 0.1s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 40 NumberOfCodeBlocks, 40 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 18 ConstructedInterpolants, 0 QuantifiedInterpolants, 918 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...