/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.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=SHALLOWEST --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 language data_model -i ../../../trunk/examples/svcomp/float-benchs/sqrt_Householder_constant.c.p+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 01:00:07,777 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 01:00:07,780 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 01:00:07,833 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 01:00:07,834 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 01:00:07,840 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 01:00:07,843 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 01:00:07,847 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 01:00:07,850 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 01:00:07,857 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 01:00:07,858 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 01:00:07,860 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 01:00:07,860 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 01:00:07,863 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 01:00:07,866 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 01:00:07,868 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 01:00:07,869 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 01:00:07,872 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 01:00:07,879 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 01:00:07,887 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 01:00:07,889 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 01:00:07,891 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 01:00:07,893 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 01:00:07,895 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 01:00:07,912 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 01:00:07,913 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 01:00:07,913 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 01:00:07,915 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 01:00:07,916 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 01:00:07,917 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 01:00:07,917 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 01:00:07,918 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 01:00:07,920 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 01:00:07,921 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 01:00:07,922 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 01:00:07,922 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 01:00:07,923 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 01:00:07,923 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 01:00:07,923 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 01:00:07,924 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 01:00:07,925 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 01:00:07,933 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 [2020-10-27 01:00:07,985 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 01:00:07,985 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 01:00:07,990 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 01:00:07,990 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 01:00:07,990 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 01:00:07,991 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 01:00:07,991 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 01:00:07,991 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 01:00:07,991 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 01:00:07,991 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 01:00:07,992 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 01:00:07,993 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 01:00:07,993 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 01:00:07,993 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 01:00:07,993 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 01:00:07,993 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 01:00:07,994 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 01:00:07,994 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 01:00:07,994 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 01:00:07,994 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 01:00:07,995 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 01:00:07,995 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:00:07,995 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 01:00:07,995 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 01:00:07,995 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 01:00:07,996 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 01:00:07,996 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 01:00:07,996 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 01:00:07,996 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 01:00:07,996 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 01:00:08,379 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 01:00:08,408 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 01:00:08,411 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 01:00:08,413 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 01:00:08,413 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 01:00:08,414 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-benchs/sqrt_Householder_constant.c.p+cfa-reducer.c [2020-10-27 01:00:08,495 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d79b42cc8/fcefcd2387744543b3793d956c5b65f5/FLAGa15632825 [2020-10-27 01:00:09,082 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 01:00:09,083 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-benchs/sqrt_Householder_constant.c.p+cfa-reducer.c [2020-10-27 01:00:09,091 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d79b42cc8/fcefcd2387744543b3793d956c5b65f5/FLAGa15632825 [2020-10-27 01:00:09,450 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d79b42cc8/fcefcd2387744543b3793d956c5b65f5 [2020-10-27 01:00:09,455 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 01:00:09,463 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 01:00:09,465 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 01:00:09,465 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 01:00:09,469 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 01:00:09,470 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:00:09" (1/1) ... [2020-10-27 01:00:09,474 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e4cf51c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:00:09, skipping insertion in model container [2020-10-27 01:00:09,474 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:00:09" (1/1) ... [2020-10-27 01:00:09,485 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 01:00:09,506 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 01:00:09,683 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:00:09,695 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 01:00:09,722 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:00:09,743 INFO L208 MainTranslator]: Completed translation [2020-10-27 01:00:09,743 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:00:09 WrapperNode [2020-10-27 01:00:09,744 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 01:00:09,745 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 01:00:09,745 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 01:00:09,745 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 01:00:09,759 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:00:09" (1/1) ... [2020-10-27 01:00:09,759 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:00:09" (1/1) ... [2020-10-27 01:00:09,769 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:00:09" (1/1) ... [2020-10-27 01:00:09,769 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:00:09" (1/1) ... [2020-10-27 01:00:09,778 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:00:09" (1/1) ... [2020-10-27 01:00:09,781 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:00:09" (1/1) ... [2020-10-27 01:00:09,783 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:00:09" (1/1) ... [2020-10-27 01:00:09,786 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 01:00:09,787 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 01:00:09,787 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 01:00:09,787 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 01:00:09,788 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:00:09" (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 [2020-10-27 01:00:09,874 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 01:00:09,874 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 01:00:09,875 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 01:00:09,875 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 01:00:09,875 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 01:00:09,875 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 01:00:09,875 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 01:00:09,876 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 01:00:09,876 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 01:00:09,876 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_double [2020-10-27 01:00:09,876 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 01:00:09,876 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 01:00:09,877 INFO L130 BoogieDeclarations]: Found specification of procedure SqrtR [2020-10-27 01:00:09,877 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 01:00:09,877 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 01:00:09,877 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 01:00:09,878 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 01:00:09,878 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 01:00:09,878 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 01:00:09,878 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 01:00:10,271 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 01:00:10,271 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 01:00:10,273 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:00:10 BoogieIcfgContainer [2020-10-27 01:00:10,273 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 01:00:10,275 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 01:00:10,275 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 01:00:10,281 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 01:00:10,282 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 01:00:09" (1/3) ... [2020-10-27 01:00:10,282 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e488cd0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:00:10, skipping insertion in model container [2020-10-27 01:00:10,283 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:00:09" (2/3) ... [2020-10-27 01:00:10,283 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e488cd0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:00:10, skipping insertion in model container [2020-10-27 01:00:10,283 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:00:10" (3/3) ... [2020-10-27 01:00:10,285 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt_Householder_constant.c.p+cfa-reducer.c [2020-10-27 01:00:10,297 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 01:00:10,302 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 01:00:10,332 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 01:00:10,362 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 01:00:10,362 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 01:00:10,362 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 01:00:10,362 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 01:00:10,363 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 01:00:10,363 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 01:00:10,363 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 01:00:10,363 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 01:00:10,381 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-10-27 01:00:10,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-27 01:00:10,388 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:00:10,389 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:00:10,389 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:00:10,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:00:10,397 INFO L82 PathProgramCache]: Analyzing trace with hash 415961256, now seen corresponding path program 1 times [2020-10-27 01:00:10,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:00:10,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1871224492] [2020-10-27 01:00:10,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:00:10,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:00:10,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:10,843 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:00:10,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 01:00:10,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:00:10,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 263 [2020-10-27 01:00:10,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:00:10,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 01:00:10,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 01:00:10,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 01:00:10,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 01:00:10,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:00:11,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:00:11,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:11,017 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:00:11,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:00:11,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:00:11,018 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 01:00:11,018 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:00:11,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:00:11,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:00:11,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:00:11,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:00:11,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:00:11,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1871224492] [2020-10-27 01:00:11,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:00:11,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 01:00:11,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120258298] [2020-10-27 01:00:11,054 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 01:00:11,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:00:11,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 01:00:11,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:00:11,074 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2020-10-27 01:00:11,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:00:11,413 INFO L93 Difference]: Finished difference Result 75 states and 101 transitions. [2020-10-27 01:00:11,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 01:00:11,416 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-10-27 01:00:11,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:00:11,426 INFO L225 Difference]: With dead ends: 75 [2020-10-27 01:00:11,426 INFO L226 Difference]: Without dead ends: 57 [2020-10-27 01:00:11,430 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:00:11,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-27 01:00:11,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 28. [2020-10-27 01:00:11,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-27 01:00:11,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 36 transitions. [2020-10-27 01:00:11,477 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 36 transitions. Word has length 19 [2020-10-27 01:00:11,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:00:11,478 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 36 transitions. [2020-10-27 01:00:11,478 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 01:00:11,478 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 36 transitions. [2020-10-27 01:00:11,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-27 01:00:11,479 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:00:11,480 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:00:11,480 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 01:00:11,480 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:00:11,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:00:11,482 INFO L82 PathProgramCache]: Analyzing trace with hash 913739075, now seen corresponding path program 1 times [2020-10-27 01:00:11,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:00:11,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [944995848] [2020-10-27 01:00:11,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:00:11,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-27 01:00:11,505 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-27 01:00:11,505 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-27 01:00:11,510 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 01:00:11,535 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 01:00:11 BoogieIcfgContainer [2020-10-27 01:00:11,535 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-27 01:00:11,539 INFO L168 Benchmark]: Toolchain (without parser) took 2079.27 ms. Allocated memory is still 161.5 MB. Free memory was 136.1 MB in the beginning and 81.6 MB in the end (delta: 54.5 MB). Peak memory consumption was 55.4 MB. Max. memory is 8.0 GB. [2020-10-27 01:00:11,541 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 161.5 MB. Free memory is still 134.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-27 01:00:11,543 INFO L168 Benchmark]: CACSL2BoogieTranslator took 279.41 ms. Allocated memory is still 161.5 MB. Free memory was 135.5 MB in the beginning and 125.1 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-10-27 01:00:11,545 INFO L168 Benchmark]: Boogie Preprocessor took 40.91 ms. Allocated memory is still 161.5 MB. Free memory was 125.1 MB in the beginning and 123.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-27 01:00:11,546 INFO L168 Benchmark]: RCFGBuilder took 486.35 ms. Allocated memory is still 161.5 MB. Free memory was 123.3 MB in the beginning and 107.2 MB in the end (delta: 16.2 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2020-10-27 01:00:11,546 INFO L168 Benchmark]: TraceAbstraction took 1260.50 ms. Allocated memory is still 161.5 MB. Free memory was 106.7 MB in the beginning and 81.6 MB in the end (delta: 25.2 MB). Peak memory consumption was 26.0 MB. Max. memory is 8.0 GB. [2020-10-27 01:00:11,558 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 161.5 MB. Free memory is still 134.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 279.41 ms. Allocated memory is still 161.5 MB. Free memory was 135.5 MB in the beginning and 125.1 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 40.91 ms. Allocated memory is still 161.5 MB. Free memory was 125.1 MB in the beginning and 123.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 486.35 ms. Allocated memory is still 161.5 MB. Free memory was 123.3 MB in the beginning and 107.2 MB in the end (delta: 16.2 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1260.50 ms. Allocated memory is still 161.5 MB. Free memory was 106.7 MB in the beginning and 81.6 MB in the end (delta: 25.2 MB). Peak memory consumption was 26.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 4]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryDOUBLEComparisonOperation at line 88, overapproximation of someUnaryDOUBLEoperation at line 42, overapproximation of someBinaryArithmeticDOUBLEoperation at line 85. Possible FailurePath: [L1] int __return_main; [L11] double _EPS = 0.0000010; [L14] double __return_125; [L17] double main__d; [L18] double main__r; [L19] main__d = 1.0 [L21] COND TRUE main__d <= 20.0 [L24] double __tmp_1; [L25] __tmp_1 = main__d [L26] double SqrtR__Input; [L27] SqrtR__Input = __tmp_1 [L28] double SqrtR__xn; [L29] double SqrtR__xnp1; [L30] double SqrtR__residu; [L31] double SqrtR__lsup; [L32] double SqrtR__linf; [L33] int SqrtR__i; [L34] int SqrtR__cond; [L35] COND TRUE SqrtR__Input <= 1.0 [L37] SqrtR__xn = 1.0 [L39] SqrtR__xnp1 = SqrtR__xn [L40] SqrtR__residu = (2.0 * _EPS) * (SqrtR__xn + SqrtR__xnp1) [L41] SqrtR__lsup = _EPS * (SqrtR__xn + SqrtR__xnp1) [L42] SqrtR__linf = -SqrtR__lsup [L43] int SqrtR____CPAchecker_TMP_0; [L44] COND FALSE !(SqrtR__residu > SqrtR__lsup) [L126] COND FALSE !(SqrtR__residu < SqrtR__linf) [L132] SqrtR____CPAchecker_TMP_0 = 0 [L49] SqrtR__cond = SqrtR____CPAchecker_TMP_0 [L50] SqrtR__i = 0 [L52] COND FALSE !(!(SqrtR__cond == 0)) [L85] __return_125 = 1.0 / SqrtR__xnp1 [L86] main__r = __return_125 [L87] int main____CPAchecker_TMP_0; [L88] COND FALSE !(main__r >= 1.0) [L114] main____CPAchecker_TMP_0 = 0 [L95] int __tmp_2; [L96] __tmp_2 = main____CPAchecker_TMP_0 [L97] int __VERIFIER_assert__cond; [L98] __VERIFIER_assert__cond = __tmp_2 [L99] COND TRUE __VERIFIER_assert__cond == 0 [L101] CALL reach_error() [L4] __assert_fail("0", "sqrt_Householder_constant.c.p+cfa-reducer.c", 4, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 37 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.1s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 60 SDtfs, 68 SDslu, 33 SDs, 0 SdLazy, 97 SolverSat, 2 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred 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, 29 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 38 NumberOfCodeBlocks, 38 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 18 ConstructedInterpolants, 0 QuantifiedInterpolants, 1098 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...