/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --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-benchs/sqrt_Householder_pseudoconstant.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 04:45:04,466 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 04:45:04,470 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 04:45:04,516 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 04:45:04,516 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 04:45:04,528 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 04:45:04,531 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 04:45:04,535 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 04:45:04,538 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 04:45:04,541 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 04:45:04,542 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 04:45:04,544 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 04:45:04,544 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 04:45:04,547 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 04:45:04,550 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 04:45:04,552 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 04:45:04,554 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 04:45:04,558 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 04:45:04,560 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 04:45:04,564 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 04:45:04,569 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 04:45:04,571 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 04:45:04,572 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 04:45:04,573 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 04:45:04,578 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 04:45:04,579 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 04:45:04,579 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 04:45:04,582 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 04:45:04,582 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 04:45:04,583 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 04:45:04,583 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 04:45:04,584 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 04:45:04,585 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 04:45:04,586 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 04:45:04,587 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 04:45:04,587 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 04:45:04,588 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 04:45:04,588 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 04:45:04,589 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 04:45:04,590 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 04:45:04,591 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 04:45:04,592 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 [2020-10-14 04:45:04,638 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 04:45:04,638 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 04:45:04,641 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 04:45:04,641 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 04:45:04,641 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 04:45:04,642 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 04:45:04,642 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 04:45:04,642 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 04:45:04,642 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 04:45:04,642 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 04:45:04,644 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 04:45:04,644 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 04:45:04,644 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 04:45:04,645 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 04:45:04,645 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 04:45:04,645 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 04:45:04,645 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 04:45:04,645 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 04:45:04,646 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 04:45:04,646 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 04:45:04,646 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 04:45:04,646 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 04:45:04,646 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 04:45:04,647 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 04:45:04,647 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 04:45:04,647 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 04:45:04,647 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 04:45:04,647 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 04:45:04,648 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 04:45:04,648 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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-14 04:45:05,004 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 04:45:05,019 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 04:45:05,023 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 04:45:05,025 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 04:45:05,025 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 04:45:05,026 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-benchs/sqrt_Householder_pseudoconstant.c [2020-10-14 04:45:05,111 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e97878a87/319345ba2bd94116a3f3de26411e04d7/FLAG0a354184f [2020-10-14 04:45:05,647 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 04:45:05,648 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-benchs/sqrt_Householder_pseudoconstant.c [2020-10-14 04:45:05,656 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e97878a87/319345ba2bd94116a3f3de26411e04d7/FLAG0a354184f [2020-10-14 04:45:06,033 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e97878a87/319345ba2bd94116a3f3de26411e04d7 [2020-10-14 04:45:06,044 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 04:45:06,045 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 04:45:06,046 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 04:45:06,047 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 04:45:06,051 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 04:45:06,052 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 04:45:06" (1/1) ... [2020-10-14 04:45:06,055 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68e64c0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 04:45:06, skipping insertion in model container [2020-10-14 04:45:06,055 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 04:45:06" (1/1) ... [2020-10-14 04:45:06,064 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 04:45:06,082 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 04:45:06,266 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 04:45:06,271 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 04:45:06,296 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 04:45:06,312 INFO L208 MainTranslator]: Completed translation [2020-10-14 04:45:06,312 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 04:45:06 WrapperNode [2020-10-14 04:45:06,313 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 04:45:06,313 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 04:45:06,314 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 04:45:06,314 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 04:45:06,427 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 04:45:06" (1/1) ... [2020-10-14 04:45:06,429 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 04:45:06" (1/1) ... [2020-10-14 04:45:06,437 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 04:45:06" (1/1) ... [2020-10-14 04:45:06,438 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 04:45:06" (1/1) ... [2020-10-14 04:45:06,454 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 04:45:06" (1/1) ... [2020-10-14 04:45:06,461 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 04:45:06" (1/1) ... [2020-10-14 04:45:06,467 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 04:45:06" (1/1) ... [2020-10-14 04:45:06,469 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 04:45:06,470 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 04:45:06,470 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 04:45:06,470 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 04:45:06,471 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 04:45:06" (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 [2020-10-14 04:45:06,536 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 04:45:06,537 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 04:45:06,537 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-14 04:45:06,537 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-14 04:45:06,537 INFO L138 BoogieDeclarations]: Found implementation of procedure SqrtR [2020-10-14 04:45:06,537 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 04:45:06,537 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 04:45:06,537 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_double [2020-10-14 04:45:06,538 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-14 04:45:06,538 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-14 04:45:06,538 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-14 04:45:06,538 INFO L130 BoogieDeclarations]: Found specification of procedure SqrtR [2020-10-14 04:45:06,538 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 04:45:06,538 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 04:45:06,538 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 04:45:06,857 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 04:45:06,858 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-14 04:45:06,870 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 04:45:06 BoogieIcfgContainer [2020-10-14 04:45:06,870 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 04:45:06,874 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 04:45:06,874 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 04:45:06,877 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 04:45:06,880 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 04:45:06" (1/3) ... [2020-10-14 04:45:06,881 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cb13e3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 04:45:06, skipping insertion in model container [2020-10-14 04:45:06,881 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 04:45:06" (2/3) ... [2020-10-14 04:45:06,881 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cb13e3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 04:45:06, skipping insertion in model container [2020-10-14 04:45:06,882 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 04:45:06" (3/3) ... [2020-10-14 04:45:06,887 INFO L109 eAbstractionObserver]: Analyzing ICFG sqrt_Householder_pseudoconstant.c [2020-10-14 04:45:06,897 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 04:45:06,905 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 04:45:06,918 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 04:45:06,940 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 04:45:06,940 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 04:45:06,941 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 04:45:06,941 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 04:45:06,941 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 04:45:06,941 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 04:45:06,941 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 04:45:06,941 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 04:45:06,958 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2020-10-14 04:45:06,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-14 04:45:06,964 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 04:45:06,965 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 04:45:06,965 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 04:45:06,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 04:45:06,970 INFO L82 PathProgramCache]: Analyzing trace with hash 1097186754, now seen corresponding path program 1 times [2020-10-14 04:45:06,978 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 04:45:06,978 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [280196059] [2020-10-14 04:45:06,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 04:45:07,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-14 04:45:07,097 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-14 04:45:07,098 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-10-14 04:45:07,101 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 04:45:07,116 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.10 04:45:07 BoogieIcfgContainer [2020-10-14 04:45:07,117 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-14 04:45:07,120 INFO L168 Benchmark]: Toolchain (without parser) took 1073.59 ms. Allocated memory was 148.4 MB in the beginning and 204.5 MB in the end (delta: 56.1 MB). Free memory was 104.5 MB in the beginning and 154.0 MB in the end (delta: -49.5 MB). Peak memory consumption was 6.6 MB. Max. memory is 7.1 GB. [2020-10-14 04:45:07,121 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 148.4 MB. Free memory was 122.9 MB in the beginning and 122.5 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. [2020-10-14 04:45:07,122 INFO L168 Benchmark]: CACSL2BoogieTranslator took 266.67 ms. Allocated memory is still 148.4 MB. Free memory was 104.5 MB in the beginning and 94.1 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-10-14 04:45:07,123 INFO L168 Benchmark]: Boogie Preprocessor took 156.02 ms. Allocated memory was 148.4 MB in the beginning and 204.5 MB in the end (delta: 56.1 MB). Free memory was 93.6 MB in the beginning and 182.0 MB in the end (delta: -88.3 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-10-14 04:45:07,124 INFO L168 Benchmark]: RCFGBuilder took 400.58 ms. Allocated memory is still 204.5 MB. Free memory was 182.0 MB in the beginning and 167.4 MB in the end (delta: 14.6 MB). Peak memory consumption was 14.6 MB. Max. memory is 7.1 GB. [2020-10-14 04:45:07,125 INFO L168 Benchmark]: TraceAbstraction took 243.20 ms. Allocated memory is still 204.5 MB. Free memory was 166.5 MB in the beginning and 154.0 MB in the end (delta: 12.5 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. [2020-10-14 04:45:07,130 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 148.4 MB. Free memory was 122.9 MB in the beginning and 122.5 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 266.67 ms. Allocated memory is still 148.4 MB. Free memory was 104.5 MB in the beginning and 94.1 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 156.02 ms. Allocated memory was 148.4 MB in the beginning and 204.5 MB in the end (delta: 56.1 MB). Free memory was 93.6 MB in the beginning and 182.0 MB in the end (delta: -88.3 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 400.58 ms. Allocated memory is still 204.5 MB. Free memory was 182.0 MB in the beginning and 167.4 MB in the end (delta: 14.6 MB). Peak memory consumption was 14.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 243.20 ms. Allocated memory is still 204.5 MB. Free memory was 166.5 MB in the beginning and 154.0 MB in the end (delta: 12.5 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 18]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryDOUBLEComparisonOperation at line 57, overapproximation of someUnaryDOUBLEoperation at line 30, overapproximation of someBinaryArithmeticDOUBLEoperation at line 42. Possible FailurePath: [L20] double _EPS = 1e-6; [L47] double d, dd, r; [L48] double epsilon = 1e-8; [L50] d = 1. [L50] COND TRUE d <= 20. [L52] dd = __VERIFIER_nondet_double() [L53] CALL assume_abort_if_not(dd >= d-epsilon && dd <= d+epsilon) [L16] COND FALSE !(!cond) [L53] RET assume_abort_if_not(dd >= d-epsilon && dd <= d+epsilon) [L55] CALL, EXPR SqrtR(dd) [L24] double xn, xnp1, residu, lsup, linf; [L25] int i, cond; [L26] COND TRUE Input <= 1.0 [L26] xn = 1.0 [L27] xnp1 = xn [L28] residu = 2.0*_EPS*(xn+xnp1) [L29] lsup = _EPS * (xn+xnp1) [L30] linf = -lsup [L31] cond = ((residu > lsup) || (residu < linf)) [L32] i = 0 [L33] COND FALSE !(\read(cond)) [L42] return 1.0 / xnp1; [L55] RET, EXPR SqrtR(dd) [L55] r = SqrtR(dd) [L57] CALL __VERIFIER_assert(r >= 0.9 && r <= 5.) [L18] COND TRUE !(cond) [L18] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 34 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.1s, OverallIterations: 1, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=34occurred 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: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 25 NumberOfCodeBlocks, 25 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 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...