/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks NOT_INCREMENTALLY -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/float-newlib/double_req_bl_0730b.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 10:44:56,880 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 10:44:56,882 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 10:44:56,894 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 10:44:56,895 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 10:44:56,896 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 10:44:56,897 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 10:44:56,899 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 10:44:56,901 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 10:44:56,902 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 10:44:56,902 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 10:44:56,904 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 10:44:56,904 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 10:44:56,905 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 10:44:56,906 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 10:44:56,907 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 10:44:56,908 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 10:44:56,909 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 10:44:56,911 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 10:44:56,913 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 10:44:56,914 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 10:44:56,916 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 10:44:56,917 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 10:44:56,918 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 10:44:56,920 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 10:44:56,928 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 10:44:56,929 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 10:44:56,930 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 10:44:56,930 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 10:44:56,945 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 10:44:56,946 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 10:44:56,947 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 10:44:56,947 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 10:44:56,947 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 10:44:56,948 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 10:44:56,948 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 10:44:56,948 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 10:44:56,948 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 10:44:56,948 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 10:44:56,948 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 10:44:56,949 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 10:44:56,949 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 10:44:56,949 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 10:44:56,950 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 10:44:56,950 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 10:44:56,950 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 10:44:56,950 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 10:44:56,951 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 10:44:56,951 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 10:44:56,951 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 10:44:56,951 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 10:44:56,951 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 10:44:56,952 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 10:44:56,952 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 10:44:56,952 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 10:44:56,952 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:44:56,953 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 10:44:56,953 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 10:44:56,953 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 -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> NOT_INCREMENTALLY [2020-07-20 10:44:57,259 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 10:44:57,283 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 10:44:57,287 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 10:44:57,288 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 10:44:57,288 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 10:44:57,290 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/double_req_bl_0730b.c [2020-07-20 10:44:57,361 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a6d25f57c/679b2422179a4b54a55753107e6ceb04/FLAGd7f7d3a04 [2020-07-20 10:44:57,879 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 10:44:57,880 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/double_req_bl_0730b.c [2020-07-20 10:44:57,888 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a6d25f57c/679b2422179a4b54a55753107e6ceb04/FLAGd7f7d3a04 [2020-07-20 10:44:58,225 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a6d25f57c/679b2422179a4b54a55753107e6ceb04 [2020-07-20 10:44:58,234 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 10:44:58,237 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 10:44:58,238 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 10:44:58,238 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 10:44:58,241 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 10:44:58,242 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:44:58" (1/1) ... [2020-07-20 10:44:58,245 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13a2ea7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:44:58, skipping insertion in model container [2020-07-20 10:44:58,245 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:44:58" (1/1) ... [2020-07-20 10:44:58,253 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 10:44:58,280 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 10:44:58,565 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 10:44:58,569 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 10:44:58,735 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 10:44:58,760 INFO L208 MainTranslator]: Completed translation [2020-07-20 10:44:58,760 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:44:58 WrapperNode [2020-07-20 10:44:58,761 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 10:44:58,761 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 10:44:58,761 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 10:44:58,761 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 10:44:58,771 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:44:58" (1/1) ... [2020-07-20 10:44:58,772 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:44:58" (1/1) ... [2020-07-20 10:44:58,789 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:44:58" (1/1) ... [2020-07-20 10:44:58,789 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:44:58" (1/1) ... [2020-07-20 10:44:58,805 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:44:58" (1/1) ... [2020-07-20 10:44:58,813 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:44:58" (1/1) ... [2020-07-20 10:44:58,816 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:44:58" (1/1) ... [2020-07-20 10:44:58,820 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 10:44:58,820 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 10:44:58,820 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 10:44:58,820 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 10:44:58,821 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:44:58" (1/1) ... No working directory specified, using /storage/repos/ultimate/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 [2020-07-20 10:44:58,887 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 10:44:58,887 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 10:44:58,887 INFO L138 BoogieDeclarations]: Found implementation of procedure __ieee754_sqrt [2020-07-20 10:44:58,887 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_double [2020-07-20 10:44:58,887 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 10:44:58,887 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 10:44:58,888 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_double [2020-07-20 10:44:58,888 INFO L130 BoogieDeclarations]: Found specification of procedure __ieee754_sqrt [2020-07-20 10:44:58,888 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 10:44:58,888 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-07-20 10:44:58,888 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 10:44:58,888 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 10:44:58,889 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 10:44:58,889 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-07-20 10:44:58,889 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_double [2020-07-20 10:44:58,889 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 10:44:58,889 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 10:44:58,890 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 10:44:59,377 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 10:44:59,378 INFO L295 CfgBuilder]: Removed 10 assume(true) statements. [2020-07-20 10:44:59,381 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:44:59 BoogieIcfgContainer [2020-07-20 10:44:59,382 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 10:44:59,383 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 10:44:59,383 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 10:44:59,386 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 10:44:59,387 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 10:44:58" (1/3) ... [2020-07-20 10:44:59,388 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c66ed06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:44:59, skipping insertion in model container [2020-07-20 10:44:59,388 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:44:58" (2/3) ... [2020-07-20 10:44:59,388 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c66ed06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:44:59, skipping insertion in model container [2020-07-20 10:44:59,389 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:44:59" (3/3) ... [2020-07-20 10:44:59,391 INFO L109 eAbstractionObserver]: Analyzing ICFG double_req_bl_0730b.c [2020-07-20 10:44:59,399 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 10:44:59,405 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 10:44:59,416 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 10:44:59,440 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 10:44:59,441 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 10:44:59,441 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 10:44:59,441 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 10:44:59,441 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 10:44:59,442 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 10:44:59,442 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 10:44:59,442 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 10:44:59,463 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states. [2020-07-20 10:44:59,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-20 10:44:59,470 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:44:59,471 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:44:59,472 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:44:59,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:44:59,479 INFO L82 PathProgramCache]: Analyzing trace with hash 85253742, now seen corresponding path program 1 times [2020-07-20 10:44:59,488 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:44:59,489 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1681827898] [2020-07-20 10:44:59,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:44:59,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:44:59,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-20 10:44:59,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:44:59,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 10:44:59,679 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 10:44:59,680 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1681827898] [2020-07-20 10:44:59,681 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 10:44:59,682 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-20 10:44:59,683 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023038316] [2020-07-20 10:44:59,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-20 10:44:59,689 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:44:59,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-20 10:44:59,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 10:44:59,707 INFO L87 Difference]: Start difference. First operand 66 states. Second operand 2 states. [2020-07-20 10:44:59,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:44:59,755 INFO L93 Difference]: Finished difference Result 124 states and 187 transitions. [2020-07-20 10:44:59,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 10:44:59,757 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 16 [2020-07-20 10:44:59,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:44:59,766 INFO L225 Difference]: With dead ends: 124 [2020-07-20 10:44:59,767 INFO L226 Difference]: Without dead ends: 62 [2020-07-20 10:44:59,770 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 10:44:59,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-07-20 10:44:59,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-07-20 10:44:59,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-07-20 10:44:59,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 82 transitions. [2020-07-20 10:44:59,806 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 82 transitions. Word has length 16 [2020-07-20 10:44:59,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:44:59,807 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 82 transitions. [2020-07-20 10:44:59,807 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-20 10:44:59,807 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 82 transitions. [2020-07-20 10:44:59,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-20 10:44:59,808 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:44:59,809 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:45:00,016 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:45:00,019 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:45:00,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:45:00,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1037787104, now seen corresponding path program 1 times [2020-07-20 10:45:00,020 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:45:00,021 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1149653108] [2020-07-20 10:45:00,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:45:00,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 10:45:00,118 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 10:45:00,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 10:45:00,145 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 10:45:00,206 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-20 10:45:00,206 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 10:45:00,422 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:45:00,453 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 10:45:00 BoogieIcfgContainer [2020-07-20 10:45:00,453 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 10:45:00,456 INFO L168 Benchmark]: Toolchain (without parser) took 2219.11 ms. Allocated memory was 137.4 MB in the beginning and 201.3 MB in the end (delta: 64.0 MB). Free memory was 101.3 MB in the beginning and 103.0 MB in the end (delta: -1.7 MB). Peak memory consumption was 62.3 MB. Max. memory is 7.1 GB. [2020-07-20 10:45:00,457 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 137.4 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-20 10:45:00,458 INFO L168 Benchmark]: CACSL2BoogieTranslator took 523.12 ms. Allocated memory was 137.4 MB in the beginning and 201.3 MB in the end (delta: 64.0 MB). Free memory was 100.9 MB in the beginning and 177.4 MB in the end (delta: -76.5 MB). Peak memory consumption was 23.8 MB. Max. memory is 7.1 GB. [2020-07-20 10:45:00,459 INFO L168 Benchmark]: Boogie Preprocessor took 58.68 ms. Allocated memory is still 201.3 MB. Free memory was 177.4 MB in the beginning and 175.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. [2020-07-20 10:45:00,460 INFO L168 Benchmark]: RCFGBuilder took 561.62 ms. Allocated memory is still 201.3 MB. Free memory was 175.3 MB in the beginning and 144.7 MB in the end (delta: 30.6 MB). Peak memory consumption was 30.6 MB. Max. memory is 7.1 GB. [2020-07-20 10:45:00,461 INFO L168 Benchmark]: TraceAbstraction took 1069.96 ms. Allocated memory is still 201.3 MB. Free memory was 144.7 MB in the beginning and 103.0 MB in the end (delta: 41.8 MB). Peak memory consumption was 41.8 MB. Max. memory is 7.1 GB. [2020-07-20 10:45:00,465 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 137.4 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 523.12 ms. Allocated memory was 137.4 MB in the beginning and 201.3 MB in the end (delta: 64.0 MB). Free memory was 100.9 MB in the beginning and 177.4 MB in the end (delta: -76.5 MB). Peak memory consumption was 23.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 58.68 ms. Allocated memory is still 201.3 MB. Free memory was 177.4 MB in the beginning and 175.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 561.62 ms. Allocated memory is still 201.3 MB. Free memory was 175.3 MB in the beginning and 144.7 MB in the end (delta: 30.6 MB). Peak memory consumption was 30.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1069.96 ms. Allocated memory is still 201.3 MB. Free memory was 144.7 MB in the beginning and 103.0 MB in the end (delta: 41.8 MB). Peak memory consumption was 41.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 154]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someUnaryDOUBLEoperation at line 149, overapproximation of someBinaryArithmeticDOUBLEoperation at line 33, overapproximation of bitwiseAnd at line 32, overapproximation of someBinaryDOUBLEComparisonOperation at line 153. Possible FailurePath: [L17] static const double one_sqrt = 1.0, tiny_sqrt = 1.0e-300; VAL [\old(one_sqrt)=0, \old(tiny_sqrt)=2, one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000] [L149] double x = -0.0; VAL [one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000] [L150] CALL, EXPR __ieee754_sqrt(x) VAL [\old(x)=6, one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000] [L20] double z; [L21] __int32_t sign = 0x80000000; [L22] __uint32_t r, t1, s1, ix1, q1; [L23] __int32_t ix0, s0, q, m, t, i; VAL [\old(x)=6, one_sqrt=1, sign=-2147483648, tiny_sqrt=1/1000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000, x=6] [L26] ieee_double_shape_type ew_u; [L27] ew_u.value = (x) [L28] EXPR ew_u.parts.msw [L28] (ix0) = ew_u.parts.msw [L29] EXPR ew_u.parts.lsw [L29] (ix1) = ew_u.parts.lsw [L32] COND TRUE (ix0 & 0x7ff00000) == 0x7ff00000 [L33] return x * x + x; VAL [\old(x)=6, ix0=38, ix1=11, one_sqrt=1, sign=-2147483648, tiny_sqrt=1/1000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000, x=6] [L150] RET, EXPR __ieee754_sqrt(x) VAL [__ieee754_sqrt(x)=7, one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000, x=6] [L150] double res = __ieee754_sqrt(x); [L153] EXPR res == -0.0 && __signbit_double(res) == 1 VAL [one_sqrt=1, res=7, res == -0.0 && __signbit_double(res) == 1=0, tiny_sqrt=1/1000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000, x=6] [L153] COND TRUE !(res == -0.0 && __signbit_double(res) == 1) [L154] __VERIFIER_error() VAL [one_sqrt=1, res=7, tiny_sqrt=1/1000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000, x=6] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 66 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.9s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 86 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 15 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=66occurred 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, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 33 NumberOfCodeBlocks, 33 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 15 ConstructedInterpolants, 0 QuantifiedInterpolants, 225 SizeOfPredicates, 0 NumberOfNonLiveVariables, 67 ConjunctsInSsa, 1 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...