/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 --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/float-newlib/float_req_bl_0832b.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 15:32:44,443 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 15:32:44,446 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 15:32:44,470 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 15:32:44,471 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 15:32:44,472 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 15:32:44,473 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 15:32:44,475 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 15:32:44,477 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 15:32:44,477 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 15:32:44,478 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 15:32:44,480 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 15:32:44,480 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 15:32:44,481 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 15:32:44,485 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 15:32:44,486 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 15:32:44,488 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 15:32:44,490 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 15:32:44,494 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 15:32:44,497 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 15:32:44,500 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 15:32:44,501 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 15:32:44,502 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 15:32:44,505 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 15:32:44,510 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 15:32:44,510 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 15:32:44,511 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 15:32:44,515 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 15:32:44,515 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 15:32:44,517 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 15:32:44,518 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 15:32:44,518 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 15:32:44,519 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 15:32:44,520 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 15:32:44,521 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 15:32:44,521 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 15:32:44,522 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 15:32:44,522 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 15:32:44,523 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 15:32:44,524 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 15:32:44,525 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 15:32:44,526 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 [2020-10-12 15:32:44,578 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 15:32:44,579 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 15:32:44,580 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 15:32:44,580 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 15:32:44,581 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 15:32:44,581 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 15:32:44,581 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 15:32:44,581 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 15:32:44,582 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 15:32:44,582 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 15:32:44,582 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 15:32:44,582 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 15:32:44,582 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 15:32:44,587 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 15:32:44,587 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 15:32:44,588 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 15:32:44,588 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 15:32:44,588 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 15:32:44,588 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 15:32:44,588 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 15:32:44,588 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 15:32:44,589 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 15:32:44,589 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 15:32:44,589 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 15:32:44,589 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 15:32:44,589 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 15:32:44,590 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 15:32:44,590 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 15:32:44,590 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 15:32:44,590 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.rcfgbuilder: Size of a code block -> SequenceOfStatements 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 -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 15:32:44,921 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 15:32:44,931 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 15:32:44,937 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 15:32:44,939 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 15:32:44,941 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 15:32:44,941 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_0832b.c [2020-10-12 15:32:45,006 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/511e42bd8/668efa399b62487d9a44c9a55dafe57e/FLAGe608886c1 [2020-10-12 15:32:45,495 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 15:32:45,496 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-newlib/float_req_bl_0832b.c [2020-10-12 15:32:45,504 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/511e42bd8/668efa399b62487d9a44c9a55dafe57e/FLAGe608886c1 [2020-10-12 15:32:45,924 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/511e42bd8/668efa399b62487d9a44c9a55dafe57e [2020-10-12 15:32:45,933 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 15:32:45,935 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 15:32:45,936 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 15:32:45,936 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 15:32:45,941 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 15:32:45,942 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 03:32:45" (1/1) ... [2020-10-12 15:32:45,946 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ba03fd1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:32:45, skipping insertion in model container [2020-10-12 15:32:45,946 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 03:32:45" (1/1) ... [2020-10-12 15:32:45,956 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 15:32:45,992 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 15:32:46,210 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 15:32:46,217 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 15:32:46,376 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 15:32:46,402 INFO L208 MainTranslator]: Completed translation [2020-10-12 15:32:46,402 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:32:46 WrapperNode [2020-10-12 15:32:46,403 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 15:32:46,403 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 15:32:46,403 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 15:32:46,404 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 15:32:46,418 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:32:46" (1/1) ... [2020-10-12 15:32:46,418 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:32:46" (1/1) ... [2020-10-12 15:32:46,431 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:32:46" (1/1) ... [2020-10-12 15:32:46,431 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:32:46" (1/1) ... [2020-10-12 15:32:46,447 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:32:46" (1/1) ... [2020-10-12 15:32:46,454 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:32:46" (1/1) ... [2020-10-12 15:32:46,457 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:32:46" (1/1) ... [2020-10-12 15:32:46,460 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 15:32:46,461 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 15:32:46,461 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 15:32:46,461 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 15:32:46,462 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:32:46" (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 [2020-10-12 15:32:46,523 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 15:32:46,523 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 15:32:46,523 INFO L138 BoogieDeclarations]: Found implementation of procedure isnan_float [2020-10-12 15:32:46,523 INFO L138 BoogieDeclarations]: Found implementation of procedure __ieee754_expf [2020-10-12 15:32:46,523 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 15:32:46,524 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 15:32:46,524 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2020-10-12 15:32:46,524 INFO L130 BoogieDeclarations]: Found specification of procedure isnan_float [2020-10-12 15:32:46,524 INFO L130 BoogieDeclarations]: Found specification of procedure __ieee754_expf [2020-10-12 15:32:46,524 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-12 15:32:46,525 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-10-12 15:32:46,525 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-12 15:32:46,525 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-12 15:32:46,525 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-10-12 15:32:46,525 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-12 15:32:46,525 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 15:32:46,525 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 15:32:46,526 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real [2020-10-12 15:32:46,526 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 15:32:46,971 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 15:32:46,971 INFO L295 CfgBuilder]: Removed 10 assume(true) statements. [2020-10-12 15:32:46,975 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 03:32:46 BoogieIcfgContainer [2020-10-12 15:32:46,975 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 15:32:46,976 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 15:32:46,977 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 15:32:46,980 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 15:32:46,980 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 03:32:45" (1/3) ... [2020-10-12 15:32:46,981 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29b86a99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 03:32:46, skipping insertion in model container [2020-10-12 15:32:46,981 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:32:46" (2/3) ... [2020-10-12 15:32:46,981 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29b86a99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 03:32:46, skipping insertion in model container [2020-10-12 15:32:46,982 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 03:32:46" (3/3) ... [2020-10-12 15:32:46,983 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_0832b.c [2020-10-12 15:32:46,992 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 15:32:47,000 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 15:32:47,012 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 15:32:47,031 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 15:32:47,031 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 15:32:47,031 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 15:32:47,032 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 15:32:47,032 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 15:32:47,032 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 15:32:47,032 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 15:32:47,032 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 15:32:47,050 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states. [2020-10-12 15:32:47,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-12 15:32:47,057 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:32:47,057 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:32:47,058 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:32:47,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:32:47,063 INFO L82 PathProgramCache]: Analyzing trace with hash 494829309, now seen corresponding path program 1 times [2020-10-12 15:32:47,070 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:32:47,070 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1512622078] [2020-10-12 15:32:47,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:32:47,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:32:47,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:32:47,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:32:47,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-12 15:32:47,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:32:47,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 158 [2020-10-12 15:32:47,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:32:47,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:32:47,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-12 15:32:47,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:32:47,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 15:32:47,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:32:47,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:32:47,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:32:47,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:32:47,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:32:47,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:32:47,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-12 15:32:47,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:32:47,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:32:47,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:32:47,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:32:47,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:32:47,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:32:47,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:32:47,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:32:47,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:32:47,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-12 15:32:47,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:32:47,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-12 15:32:47,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:32:47,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:32:47,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-12 15:32:47,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:32:47,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-12 15:32:47,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:32:47,672 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1512622078] [2020-10-12 15:32:47,675 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 15:32:47,675 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 15:32:47,676 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451689895] [2020-10-12 15:32:47,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 15:32:47,683 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:32:47,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 15:32:47,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 15:32:47,698 INFO L87 Difference]: Start difference. First operand 45 states. Second operand 4 states. [2020-10-12 15:32:47,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:32:47,951 INFO L93 Difference]: Finished difference Result 82 states and 124 transitions. [2020-10-12 15:32:47,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-12 15:32:47,953 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-10-12 15:32:47,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:32:47,967 INFO L225 Difference]: With dead ends: 82 [2020-10-12 15:32:47,967 INFO L226 Difference]: Without dead ends: 41 [2020-10-12 15:32:47,971 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 [2020-10-12 15:32:47,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-12 15:32:48,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-10-12 15:32:48,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-12 15:32:48,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2020-10-12 15:32:48,020 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 16 [2020-10-12 15:32:48,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:32:48,020 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2020-10-12 15:32:48,021 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 15:32:48,021 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2020-10-12 15:32:48,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-12 15:32:48,022 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:32:48,022 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:32:48,022 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 15:32:48,023 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:32:48,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:32:48,023 INFO L82 PathProgramCache]: Analyzing trace with hash 850437080, now seen corresponding path program 1 times [2020-10-12 15:32:48,023 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:32:48,024 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [748907483] [2020-10-12 15:32:48,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:32:48,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-12 15:32:48,097 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-12 15:32:48,098 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-10-12 15:32:48,113 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 15:32:48,134 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.10 03:32:48 BoogieIcfgContainer [2020-10-12 15:32:48,134 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-12 15:32:48,137 INFO L168 Benchmark]: Toolchain (without parser) took 2201.68 ms. Allocated memory was 147.8 MB in the beginning and 233.8 MB in the end (delta: 86.0 MB). Free memory was 103.5 MB in the beginning and 182.7 MB in the end (delta: -79.3 MB). Peak memory consumption was 6.7 MB. Max. memory is 7.1 GB. [2020-10-12 15:32:48,138 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 147.8 MB. Free memory was 122.4 MB in the beginning and 122.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-10-12 15:32:48,139 INFO L168 Benchmark]: CACSL2BoogieTranslator took 467.30 ms. Allocated memory was 147.8 MB in the beginning and 203.9 MB in the end (delta: 56.1 MB). Free memory was 103.2 MB in the beginning and 180.1 MB in the end (delta: -76.8 MB). Peak memory consumption was 19.9 MB. Max. memory is 7.1 GB. [2020-10-12 15:32:48,140 INFO L168 Benchmark]: Boogie Preprocessor took 57.28 ms. Allocated memory is still 203.9 MB. Free memory was 180.1 MB in the beginning and 178.2 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. [2020-10-12 15:32:48,140 INFO L168 Benchmark]: RCFGBuilder took 514.32 ms. Allocated memory is still 203.9 MB. Free memory was 178.2 MB in the beginning and 152.2 MB in the end (delta: 25.9 MB). Peak memory consumption was 25.9 MB. Max. memory is 7.1 GB. [2020-10-12 15:32:48,141 INFO L168 Benchmark]: TraceAbstraction took 1157.63 ms. Allocated memory was 203.9 MB in the beginning and 233.8 MB in the end (delta: 29.9 MB). Free memory was 152.2 MB in the beginning and 182.7 MB in the end (delta: -30.5 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-10-12 15:32:48,145 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 147.8 MB. Free memory was 122.4 MB in the beginning and 122.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 467.30 ms. Allocated memory was 147.8 MB in the beginning and 203.9 MB in the end (delta: 56.1 MB). Free memory was 103.2 MB in the beginning and 180.1 MB in the end (delta: -76.8 MB). Peak memory consumption was 19.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 57.28 ms. Allocated memory is still 203.9 MB. Free memory was 180.1 MB in the beginning and 178.2 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 514.32 ms. Allocated memory is still 203.9 MB. Free memory was 178.2 MB in the beginning and 152.2 MB in the end (delta: 25.9 MB). Peak memory consumption was 25.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1157.63 ms. Allocated memory was 203.9 MB in the beginning and 233.8 MB in the end (delta: 29.9 MB). Free memory was 152.2 MB in the beginning and 182.7 MB in the end (delta: -30.5 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 122]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 121, overapproximation of someUnaryDOUBLEoperation at line 19, overapproximation of bitwiseAnd at line 46, overapproximation of someUnaryFLOAToperation at line 117, overapproximation of someBinaryArithmeticFLOAToperation at line 50. Possible FailurePath: [L15-L34] static const float one_exp = 1.0, halF_exp[2] = { 0.5, -0.5, }, huge_exp = 1.0e+30, twom100_exp = 7.8886090522e-31, ln2HI_exp[2] = { 6.9313812256e-01, -6.9313812256e-01, }, ln2LO_exp[2] = { 9.0580006145e-06, -9.0580006145e-06, }, invln2_exp = 1.4426950216e+00, P1_exp = 1.6666667163e-01, P2_exp = -2.7777778450e-03, P3_exp = 6.6137559770e-05, P4_exp = -1.6533901999e-06, P5_exp = 4.1381369442e-08; [L117] float x = -0.0f; [L118] CALL, EXPR __ieee754_expf(x) [L37] float y, hi, lo, c, t; [L38] __int32_t k = 0, xsb, sx; [L39] __uint32_t hx; [L42] ieee_float_shape_type gf_u; [L43] gf_u.value = (x) [L44] EXPR gf_u.word [L44] (sx) = gf_u.word [L46] xsb = (sx >> 31) & 1 [L47] hx = sx & 0x7fffffff [L49] COND TRUE ((hx) > 0x7f800000L) [L50] return x + x; [L118] RET, EXPR __ieee754_expf(x) [L118] float res = __ieee754_expf(x); [L121] COND TRUE res != 1.0f [L122] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 48 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.0s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 53 SDtfs, 4 SDslu, 45 SDs, 0 SdLazy, 57 SolverSat, 4 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=45occurred 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, 0.4s InterpolantComputationTime, 33 NumberOfCodeBlocks, 33 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 15 ConstructedInterpolants, 0 QuantifiedInterpolants, 1260 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...