/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --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 -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 09:05:11,948 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 09:05:11,951 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 09:05:11,989 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 09:05:11,990 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 09:05:11,991 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 09:05:11,993 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 09:05:11,996 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 09:05:11,998 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 09:05:12,000 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 09:05:12,001 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 09:05:12,003 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 09:05:12,003 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 09:05:12,005 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 09:05:12,006 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 09:05:12,008 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 09:05:12,020 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 09:05:12,021 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 09:05:12,024 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 09:05:12,026 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 09:05:12,028 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 09:05:12,030 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 09:05:12,033 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 09:05:12,035 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 09:05:12,040 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 09:05:12,041 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 09:05:12,041 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 09:05:12,042 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 09:05:12,043 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 09:05:12,044 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 09:05:12,045 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 09:05:12,046 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 09:05:12,047 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 09:05:12,048 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 09:05:12,049 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 09:05:12,049 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 09:05:12,050 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 09:05:12,050 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 09:05:12,051 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 09:05:12,052 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 09:05:12,053 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 09:05:12,054 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 [2020-10-29 09:05:12,089 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 09:05:12,090 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 09:05:12,092 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 09:05:12,093 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 09:05:12,093 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 09:05:12,093 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 09:05:12,093 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 09:05:12,093 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 09:05:12,094 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 09:05:12,094 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 09:05:12,094 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 09:05:12,094 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 09:05:12,094 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 09:05:12,095 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 09:05:12,095 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 09:05:12,096 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 09:05:12,096 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 09:05:12,097 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 09:05:12,097 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 09:05:12,097 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 09:05:12,097 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 09:05:12,097 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 09:05:12,098 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 09:05:12,098 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 09:05:12,098 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 09:05:12,099 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 09:05:12,099 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 09:05:12,099 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 09:05:12,099 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 09:05:12,099 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 09:05:12,556 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 09:05:12,593 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 09:05:12,597 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 09:05:12,599 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 09:05:12,599 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 09:05:12,601 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-benchs/sqrt_Householder_constant.c [2020-10-29 09:05:12,698 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/af0b0f4cf/de63bd3c361b49f7b33646386849e6ed/FLAG9486a5d29 [2020-10-29 09:05:13,373 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 09:05:13,374 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-benchs/sqrt_Householder_constant.c [2020-10-29 09:05:13,384 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/af0b0f4cf/de63bd3c361b49f7b33646386849e6ed/FLAG9486a5d29 [2020-10-29 09:05:13,700 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/af0b0f4cf/de63bd3c361b49f7b33646386849e6ed [2020-10-29 09:05:13,706 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 09:05:13,712 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 09:05:13,715 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 09:05:13,716 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 09:05:13,719 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 09:05:13,720 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:05:13" (1/1) ... [2020-10-29 09:05:13,724 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74b374bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:05:13, skipping insertion in model container [2020-10-29 09:05:13,724 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:05:13" (1/1) ... [2020-10-29 09:05:13,732 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 09:05:13,748 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 09:05:13,927 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:05:13,937 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 09:05:13,960 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:05:13,977 INFO L208 MainTranslator]: Completed translation [2020-10-29 09:05:13,977 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:05:13 WrapperNode [2020-10-29 09:05:13,977 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 09:05:13,979 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 09:05:13,979 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 09:05:13,979 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 09:05:13,992 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:05:13" (1/1) ... [2020-10-29 09:05:13,992 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:05:13" (1/1) ... [2020-10-29 09:05:14,001 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:05:13" (1/1) ... [2020-10-29 09:05:14,001 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:05:13" (1/1) ... [2020-10-29 09:05:14,010 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:05:13" (1/1) ... [2020-10-29 09:05:14,015 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:05:13" (1/1) ... [2020-10-29 09:05:14,017 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:05:13" (1/1) ... [2020-10-29 09:05:14,020 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 09:05:14,021 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 09:05:14,021 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 09:05:14,021 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 09:05:14,022 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:05:13" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 09:05:14,094 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 09:05:14,095 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 09:05:14,095 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 09:05:14,095 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-29 09:05:14,095 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-29 09:05:14,095 INFO L138 BoogieDeclarations]: Found implementation of procedure SqrtR [2020-10-29 09:05:14,096 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 09:05:14,096 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 09:05:14,096 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 09:05:14,096 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 09:05:14,096 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 09:05:14,097 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_double [2020-10-29 09:05:14,097 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-29 09:05:14,097 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-29 09:05:14,097 INFO L130 BoogieDeclarations]: Found specification of procedure SqrtR [2020-10-29 09:05:14,097 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 09:05:14,098 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 09:05:14,098 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 09:05:14,098 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 09:05:14,098 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 09:05:14,098 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 09:05:14,099 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 09:05:14,568 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 09:05:14,568 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-29 09:05:14,571 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:05:14 BoogieIcfgContainer [2020-10-29 09:05:14,571 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 09:05:14,575 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 09:05:14,575 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 09:05:14,579 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 09:05:14,579 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 09:05:13" (1/3) ... [2020-10-29 09:05:14,580 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7979f697 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:05:14, skipping insertion in model container [2020-10-29 09:05:14,581 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:05:13" (2/3) ... [2020-10-29 09:05:14,581 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7979f697 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:05:14, skipping insertion in model container [2020-10-29 09:05:14,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:05:14" (3/3) ... [2020-10-29 09:05:14,584 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt_Householder_constant.c [2020-10-29 09:05:14,600 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 09:05:14,606 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 09:05:14,622 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 09:05:14,686 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 09:05:14,686 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 09:05:14,686 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 09:05:14,686 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 09:05:14,686 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 09:05:14,687 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 09:05:14,687 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 09:05:14,687 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 09:05:14,709 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-10-29 09:05:14,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-29 09:05:14,721 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:05:14,722 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] [2020-10-29 09:05:14,722 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:05:14,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:05:14,733 INFO L82 PathProgramCache]: Analyzing trace with hash 612757899, now seen corresponding path program 1 times [2020-10-29 09:05:14,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:05:14,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [450384376] [2020-10-29 09:05:14,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:05:14,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:05:15,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:05:15,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:05:15,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-29 09:05:15,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:05:15,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 229 [2020-10-29 09:05:15,189 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:05:15,190 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:05:15,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:05:15,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-29 09:05:15,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:05:15,190 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-29 09:05:15,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:05:15,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:05:15,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:05:15,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:05:15,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:05:15,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:05:15,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-29 09:05:15,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:05:15,375 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:05:15,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:05:15,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:05:15,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:05:15,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 09:05:15,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 09:05:15,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:05:15,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:05:15,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:05:15,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-29 09:05:15,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:05:15,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-29 09:05:15,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:05:15,433 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:05:15,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:05:15,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 09:05:15,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:05:15,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:05:15,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:05:15,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [450384376] [2020-10-29 09:05:15,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:05:15,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-29 09:05:15,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258128268] [2020-10-29 09:05:15,466 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-29 09:05:15,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:05:15,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-29 09:05:15,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-29 09:05:15,484 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 3 states. [2020-10-29 09:05:15,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:05:15,612 INFO L93 Difference]: Finished difference Result 57 states and 70 transitions. [2020-10-29 09:05:15,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-29 09:05:15,614 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-10-29 09:05:15,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:05:15,626 INFO L225 Difference]: With dead ends: 57 [2020-10-29 09:05:15,627 INFO L226 Difference]: Without dead ends: 25 [2020-10-29 09:05:15,633 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-29 09:05:15,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-29 09:05:15,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-29 09:05:15,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-29 09:05:15,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-10-29 09:05:15,678 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 21 [2020-10-29 09:05:15,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:05:15,678 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-10-29 09:05:15,678 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-29 09:05:15,679 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-10-29 09:05:15,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-29 09:05:15,680 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:05:15,680 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] [2020-10-29 09:05:15,680 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 09:05:15,680 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:05:15,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:05:15,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1398811919, now seen corresponding path program 1 times [2020-10-29 09:05:15,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:05:15,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1349690038] [2020-10-29 09:05:15,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:05:15,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-29 09:05:15,725 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-29 09:05:15,726 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-29 09:05:15,732 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 09:05:15,752 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.10 09:05:15 BoogieIcfgContainer [2020-10-29 09:05:15,753 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-29 09:05:15,758 INFO L168 Benchmark]: Toolchain (without parser) took 2046.53 ms. Allocated memory is still 161.5 MB. Free memory was 136.6 MB in the beginning and 105.6 MB in the end (delta: 31.0 MB). Peak memory consumption was 32.3 MB. Max. memory is 8.0 GB. [2020-10-29 09:05:15,760 INFO L168 Benchmark]: CDTParser took 1.65 ms. Allocated memory is still 161.5 MB. Free memory was 133.5 MB in the beginning and 133.4 MB in the end (delta: 102.7 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-29 09:05:15,762 INFO L168 Benchmark]: CACSL2BoogieTranslator took 262.48 ms. Allocated memory is still 161.5 MB. Free memory was 136.0 MB in the beginning and 125.8 MB in the end (delta: 10.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-29 09:05:15,764 INFO L168 Benchmark]: Boogie Preprocessor took 41.63 ms. Allocated memory is still 161.5 MB. Free memory was 125.8 MB in the beginning and 124.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-29 09:05:15,765 INFO L168 Benchmark]: RCFGBuilder took 550.11 ms. Allocated memory is still 161.5 MB. Free memory was 124.2 MB in the beginning and 108.7 MB in the end (delta: 15.5 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2020-10-29 09:05:15,766 INFO L168 Benchmark]: TraceAbstraction took 1177.94 ms. Allocated memory is still 161.5 MB. Free memory was 108.3 MB in the beginning and 105.6 MB in the end (delta: 2.7 MB). Peak memory consumption was 4.0 MB. Max. memory is 8.0 GB. [2020-10-29 09:05:15,781 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.65 ms. Allocated memory is still 161.5 MB. Free memory was 133.5 MB in the beginning and 133.4 MB in the end (delta: 102.7 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 262.48 ms. Allocated memory is still 161.5 MB. Free memory was 136.0 MB in the beginning and 125.8 MB in the end (delta: 10.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 41.63 ms. Allocated memory is still 161.5 MB. Free memory was 125.8 MB in the beginning and 124.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 550.11 ms. Allocated memory is still 161.5 MB. Free memory was 124.2 MB in the beginning and 108.7 MB in the end (delta: 15.5 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1177.94 ms. Allocated memory is still 161.5 MB. Free memory was 108.3 MB in the beginning and 105.6 MB in the end (delta: 2.7 MB). Peak memory consumption was 4.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 3]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryDOUBLEComparisonOperation at line 55, overapproximation of someUnaryDOUBLEoperation at line 32, overapproximation of someBinaryArithmeticDOUBLEoperation at line 44. Possible FailurePath: [L22] double _EPS = 1e-6; [L49] double d, r; [L51] d = 1. [L51] COND TRUE d <= 20. [L53] CALL, EXPR SqrtR(d) [L26] double xn, xnp1, residu, lsup, linf; [L27] int i, cond; [L28] COND TRUE Input <= 1.0 [L28] xn = 1.0 [L29] xnp1 = xn [L30] residu = 2.0*_EPS*(xn+xnp1) [L31] lsup = _EPS * (xn+xnp1) [L32] linf = -lsup [L33] cond = ((residu > lsup) || (residu < linf)) [L34] i = 0 [L35] COND FALSE !(\read(cond)) [L44] return 1.0 / xnp1; [L53] RET, EXPR SqrtR(d) [L53] r = SqrtR(d) [L55] CALL __VERIFIER_assert(r >= 1.0 && r <= 5.0) [L20] COND TRUE !(cond) [L20] CALL reach_error() [L3] __assert_fail("0", "sqrt_Householder_constant.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 37 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.0s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 29 SDtfs, 20 SDslu, 3 SDs, 0 SdLazy, 5 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s 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, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 42 NumberOfCodeBlocks, 42 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 20 ConstructedInterpolants, 0 QuantifiedInterpolants, 1060 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...