/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/Ultimate.py --spec ../../../trunk/examples/svcomp/ReachSafety.prp --file ../../../trunk/examples/svcomp/float-benchs/sqrt_biNewton_pseudoconstant_true-unreach-call.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 40ef5092 Calling Ultimate with: java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/float-benchs/sqrt_biNewton_pseudoconstant_true-unreach-call.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 71bb07c94f4fe427420ff52287a2ed237302fad2 ...................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/float-benchs/sqrt_biNewton_pseudoconstant_true-unreach-call.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 71bb07c94f4fe427420ff52287a2ed237302fad2 ................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. No stderr output. --- Real Ultimate output --- This is Ultimate 0.1.23-40ef509 [2018-09-20 14:21:09,963 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-20 14:21:09,965 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-20 14:21:09,977 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-20 14:21:09,978 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-20 14:21:09,979 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-20 14:21:09,980 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-20 14:21:09,982 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-20 14:21:09,983 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-20 14:21:09,984 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-20 14:21:09,985 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-20 14:21:09,986 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-20 14:21:09,986 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-20 14:21:09,987 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-20 14:21:09,989 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-20 14:21:09,989 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-20 14:21:09,990 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-20 14:21:09,992 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-20 14:21:09,994 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-20 14:21:09,996 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-20 14:21:09,997 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-20 14:21:09,998 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-20 14:21:10,001 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-20 14:21:10,001 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-20 14:21:10,001 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-20 14:21:10,003 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-20 14:21:10,004 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-20 14:21:10,005 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-20 14:21:10,006 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-20 14:21:10,007 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-20 14:21:10,010 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-20 14:21:10,011 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-09-20 14:21:10,011 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-09-20 14:21:10,011 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-09-20 14:21:10,012 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-09-20 14:21:10,019 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-09-20 14:21:10,019 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-09-20 14:21:10,038 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-20 14:21:10,039 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-20 14:21:10,040 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-20 14:21:10,040 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-20 14:21:10,040 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-20 14:21:10,041 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-20 14:21:10,041 INFO L133 SettingsManager]: * Use SBE=true [2018-09-20 14:21:10,041 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-20 14:21:10,041 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-20 14:21:10,041 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-20 14:21:10,041 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-20 14:21:10,042 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-20 14:21:10,042 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-20 14:21:10,042 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-20 14:21:10,042 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-20 14:21:10,042 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-20 14:21:10,042 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-20 14:21:10,042 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-20 14:21:10,043 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-20 14:21:10,043 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-20 14:21:10,043 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-20 14:21:10,043 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-20 14:21:10,043 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-20 14:21:10,044 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-20 14:21:10,044 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-20 14:21:10,044 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-20 14:21:10,044 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-20 14:21:10,044 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-20 14:21:10,044 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-20 14:21:10,044 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 71bb07c94f4fe427420ff52287a2ed237302fad2 [2018-09-20 14:21:10,095 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-20 14:21:10,108 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-20 14:21:10,112 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-20 14:21:10,113 INFO L271 PluginConnector]: Initializing CDTParser... [2018-09-20 14:21:10,114 INFO L276 PluginConnector]: CDTParser initialized [2018-09-20 14:21:10,115 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-benchs/sqrt_biNewton_pseudoconstant_true-unreach-call.c [2018-09-20 14:21:10,459 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef7c93abe/28c5374b6d5f4a1da858fab756cfe843/FLAG2cc10e76c [2018-09-20 14:21:10,663 INFO L277 CDTParser]: Found 1 translation units. [2018-09-20 14:21:10,665 INFO L159 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-benchs/sqrt_biNewton_pseudoconstant_true-unreach-call.c [2018-09-20 14:21:10,677 INFO L325 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef7c93abe/28c5374b6d5f4a1da858fab756cfe843/FLAG2cc10e76c [2018-09-20 14:21:10,707 INFO L333 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef7c93abe/28c5374b6d5f4a1da858fab756cfe843 [2018-09-20 14:21:10,713 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-20 14:21:10,719 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-09-20 14:21:10,721 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-09-20 14:21:10,723 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-09-20 14:21:10,732 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-09-20 14:21:10,733 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 02:21:10" (1/1) ... [2018-09-20 14:21:10,737 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5bbe2762 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 02:21:10, skipping insertion in model container [2018-09-20 14:21:10,737 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 02:21:10" (1/1) ... [2018-09-20 14:21:10,752 INFO L160 ieTranslatorObserver]: Starting translation in SV-COMP mode [2018-09-20 14:21:10,994 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-20 14:21:11,013 INFO L424 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-09-20 14:21:11,028 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-20 14:21:11,044 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 02:21:11 WrapperNode [2018-09-20 14:21:11,044 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-09-20 14:21:11,045 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-20 14:21:11,045 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-20 14:21:11,045 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-20 14:21:11,061 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 02:21:11" (1/1) ... [2018-09-20 14:21:11,061 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 02:21:11" (1/1) ... [2018-09-20 14:21:11,068 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 02:21:11" (1/1) ... [2018-09-20 14:21:11,068 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 02:21:11" (1/1) ... [2018-09-20 14:21:11,072 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 02:21:11" (1/1) ... [2018-09-20 14:21:11,078 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 02:21:11" (1/1) ... [2018-09-20 14:21:11,079 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 02:21:11" (1/1) ... [2018-09-20 14:21:11,081 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-20 14:21:11,082 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-20 14:21:11,082 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-20 14:21:11,082 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-20 14:21:11,083 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 02:21:11" (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 [2018-09-20 14:21:11,162 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-09-20 14:21:11,162 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-20 14:21:11,162 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-09-20 14:21:11,162 INFO L138 BoogieDeclarations]: Found implementation of procedure SqrtR [2018-09-20 14:21:11,162 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-20 14:21:11,163 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-09-20 14:21:11,163 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_double [2018-09-20 14:21:11,163 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2018-09-20 14:21:11,163 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-09-20 14:21:11,163 INFO L130 BoogieDeclarations]: Found specification of procedure SqrtR [2018-09-20 14:21:11,164 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-20 14:21:11,164 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-09-20 14:21:11,164 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-20 14:21:11,801 INFO L365 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-20 14:21:11,802 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 02:21:11 BoogieIcfgContainer [2018-09-20 14:21:11,802 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-20 14:21:11,805 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-20 14:21:11,805 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-20 14:21:11,814 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-20 14:21:11,814 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 02:21:10" (1/3) ... [2018-09-20 14:21:11,815 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10b8a29e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 02:21:11, skipping insertion in model container [2018-09-20 14:21:11,816 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 02:21:11" (2/3) ... [2018-09-20 14:21:11,816 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10b8a29e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 02:21:11, skipping insertion in model container [2018-09-20 14:21:11,816 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 02:21:11" (3/3) ... [2018-09-20 14:21:11,819 INFO L112 eAbstractionObserver]: Analyzing ICFG sqrt_biNewton_pseudoconstant_true-unreach-call.c [2018-09-20 14:21:11,831 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-20 14:21:11,840 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-20 14:21:11,887 INFO L130 ementStrategyFactory]: Using default assertion order modulation [2018-09-20 14:21:11,888 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-20 14:21:11,888 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-20 14:21:11,889 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-20 14:21:11,889 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-20 14:21:11,889 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-20 14:21:11,889 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-20 14:21:11,889 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-20 14:21:11,889 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-20 14:21:11,910 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2018-09-20 14:21:11,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-20 14:21:11,918 INFO L368 BasicCegarLoop]: Found error trace [2018-09-20 14:21:11,919 INFO L376 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-20 14:21:11,923 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-20 14:21:11,928 INFO L82 PathProgramCache]: Analyzing trace with hash 924932034, now seen corresponding path program 1 times [2018-09-20 14:21:11,931 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-20 14:21:11,931 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-20 14:21:11,989 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-20 14:21:11,990 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-20 14:21:11,990 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-20 14:21:12,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-20 14:21:12,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-20 14:21:12,085 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-20 14:21:12,086 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-20 14:21:12,091 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-09-20 14:21:12,107 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-09-20 14:21:12,108 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-09-20 14:21:12,111 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 2 states. [2018-09-20 14:21:12,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-20 14:21:12,139 INFO L93 Difference]: Finished difference Result 56 states and 68 transitions. [2018-09-20 14:21:12,139 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-09-20 14:21:12,141 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 21 [2018-09-20 14:21:12,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-20 14:21:12,151 INFO L225 Difference]: With dead ends: 56 [2018-09-20 14:21:12,151 INFO L226 Difference]: Without dead ends: 26 [2018-09-20 14:21:12,155 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-09-20 14:21:12,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-09-20 14:21:12,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-09-20 14:21:12,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-20 14:21:12,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2018-09-20 14:21:12,204 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 21 [2018-09-20 14:21:12,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-20 14:21:12,205 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2018-09-20 14:21:12,205 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-09-20 14:21:12,205 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2018-09-20 14:21:12,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-20 14:21:12,206 INFO L368 BasicCegarLoop]: Found error trace [2018-09-20 14:21:12,206 INFO L376 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] [2018-09-20 14:21:12,207 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-20 14:21:12,208 INFO L82 PathProgramCache]: Analyzing trace with hash 244023785, now seen corresponding path program 1 times [2018-09-20 14:21:12,209 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-20 14:21:12,209 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-20 14:21:12,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-20 14:21:12,211 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-20 14:21:12,211 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-20 14:21:12,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-09-20 14:21:12,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-09-20 14:21:12,281 INFO L443 BasicCegarLoop]: Counterexample might be feasible [2018-09-20 14:21:12,317 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.09 02:21:12 BoogieIcfgContainer [2018-09-20 14:21:12,317 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-20 14:21:12,318 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-09-20 14:21:12,318 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-09-20 14:21:12,318 INFO L276 PluginConnector]: Witness Printer initialized [2018-09-20 14:21:12,319 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 02:21:11" (3/4) ... [2018-09-20 14:21:12,323 INFO L147 WitnessPrinter]: No result that supports witness generation found [2018-09-20 14:21:12,323 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-09-20 14:21:12,324 INFO L168 Benchmark]: Toolchain (without parser) took 1610.05 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 71.3 MB). Free memory was 950.5 MB in the beginning and 1.0 GB in the end (delta: -67.0 MB). Peak memory consumption was 4.3 MB. Max. memory is 11.5 GB. [2018-09-20 14:21:12,327 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 1.0 GB. Free memory is still 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-09-20 14:21:12,327 INFO L168 Benchmark]: CACSL2BoogieTranslator took 323.60 ms. Allocated memory is still 1.0 GB. Free memory was 950.5 MB in the beginning and 939.8 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-09-20 14:21:12,328 INFO L168 Benchmark]: Boogie Preprocessor took 36.21 ms. Allocated memory is still 1.0 GB. Free memory is still 939.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-09-20 14:21:12,329 INFO L168 Benchmark]: RCFGBuilder took 720.74 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 71.3 MB). Free memory was 939.8 MB in the beginning and 1.0 GB in the end (delta: -106.6 MB). Peak memory consumption was 27.0 MB. Max. memory is 11.5 GB. [2018-09-20 14:21:12,330 INFO L168 Benchmark]: TraceAbstraction took 512.42 ms. Allocated memory is still 1.1 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 21.6 MB). Peak memory consumption was 21.6 MB. Max. memory is 11.5 GB. [2018-09-20 14:21:12,331 INFO L168 Benchmark]: Witness Printer took 5.73 ms. Allocated memory is still 1.1 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-09-20 14:21:12,336 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 1.0 GB. Free memory is still 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 323.60 ms. Allocated memory is still 1.0 GB. Free memory was 950.5 MB in the beginning and 939.8 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 36.21 ms. Allocated memory is still 1.0 GB. Free memory is still 939.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 720.74 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 71.3 MB). Free memory was 939.8 MB in the beginning and 1.0 GB in the end (delta: -106.6 MB). Peak memory consumption was 27.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 512.42 ms. Allocated memory is still 1.1 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 21.6 MB). Peak memory consumption was 21.6 MB. Max. memory is 11.5 GB. * Witness Printer took 5.73 ms. Allocated memory is still 1.1 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 8]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryDOUBLEComparisonOperation at line 21, overapproximation of someUnaryDOUBLEoperation at line 20, overapproximation of someBinaryArithmeticDOUBLEoperation at line 33. Possible FailurePath: [L10] double _EPS = 1e-6; VAL [\old(_EPS)=3, _EPS=1/1000000] [L38] double d, dd, r; [L39] double epsilon = 1e-8; [L41] d = 1. VAL [_EPS=1/1000000, d=1, epsilon=1/100000000] [L41] COND TRUE d <= 20. [L43] dd = __VERIFIER_nondet_double() [L46] CALL, EXPR SqrtR(dd) VAL [\old(Input)=2, _EPS=1/1000000] [L14] double xn, xnp1, residu, lsup, linf; [L15] int i, cond; VAL [\old(Input)=2, _EPS=1/1000000, Input=2] [L16] COND TRUE Input <= 1.0 [L16] xn = 1.0 VAL [\old(Input)=2, _EPS=1/1000000, Input=2, xn=1] [L17] xnp1 = xn [L18] residu = 2.0*_EPS*(xn+xnp1) [L19] lsup = _EPS * (xn+xnp1) [L20] linf = -lsup [L21] cond = ((residu > lsup) || (residu < linf)) [L22] i = 0 VAL [\old(Input)=2, _EPS=1/1000000, cond=0, i=0, Input=2, xn=1, xn=1] [L23] COND FALSE !(\read(cond)) VAL [\old(Input)=2, _EPS=1/1000000, cond=0, i=0, Input=2, xn=1, xn=1] [L33] RET return 1.0 / xnp1; VAL [\old(Input)=2, _EPS=1/1000000, cond=0, i=0, Input=2, xn=1, xn=1] [L46] EXPR SqrtR(dd) VAL [_EPS=1/1000000, d=2, d=1, epsilon=1/100000000, SqrtR(dd)=4] [L46] r = SqrtR(dd) [L48] CALL __VERIFIER_assert(r >= 0.9 && r <= 5.) VAL [\old(cond)=0, _EPS=1/1000000] [L8] COND TRUE !(cond) VAL [\old(cond)=0, _EPS=1/1000000, cond=0] [L8] __VERIFIER_error() VAL [\old(cond)=0, _EPS=1/1000000, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 31 locations, 1 error locations. UNSAFE Result, 0.4s OverallTime, 2 OverallIterations, 1 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 33 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 43 NumberOfCodeBlocks, 43 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 20 ConstructedInterpolants, 0 QuantifiedInterpolants, 400 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.1.23-40ef509 [2018-09-20 14:21:14,827 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-20 14:21:14,829 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-20 14:21:14,842 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-20 14:21:14,842 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-20 14:21:14,843 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-20 14:21:14,845 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-20 14:21:14,847 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-20 14:21:14,849 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-20 14:21:14,851 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-20 14:21:14,852 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-20 14:21:14,852 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-20 14:21:14,853 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-20 14:21:14,858 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-20 14:21:14,860 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-20 14:21:14,861 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-20 14:21:14,862 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-20 14:21:14,864 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-20 14:21:14,869 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-20 14:21:14,871 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-20 14:21:14,872 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-20 14:21:14,873 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-20 14:21:14,881 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-20 14:21:14,884 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-20 14:21:14,884 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-20 14:21:14,885 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-20 14:21:14,889 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-20 14:21:14,890 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-20 14:21:14,894 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-20 14:21:14,897 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-20 14:21:14,898 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-20 14:21:14,899 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-09-20 14:21:14,899 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-09-20 14:21:14,899 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-09-20 14:21:14,900 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-09-20 14:21:14,901 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-09-20 14:21:14,902 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2018-09-20 14:21:14,917 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-20 14:21:14,918 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-20 14:21:14,918 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-20 14:21:14,919 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-20 14:21:14,919 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-20 14:21:14,919 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-20 14:21:14,920 INFO L133 SettingsManager]: * Use SBE=true [2018-09-20 14:21:14,920 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-20 14:21:14,921 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-20 14:21:14,921 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-20 14:21:14,921 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-20 14:21:14,921 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-20 14:21:14,921 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-20 14:21:14,921 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-20 14:21:14,922 INFO L133 SettingsManager]: * Use bitvectors instead of ints=true [2018-09-20 14:21:14,922 INFO L133 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2018-09-20 14:21:14,922 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-20 14:21:14,922 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-20 14:21:14,922 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-20 14:21:14,924 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-20 14:21:14,924 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-20 14:21:14,924 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-20 14:21:14,924 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-20 14:21:14,924 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-20 14:21:14,925 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-20 14:21:14,925 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-20 14:21:14,925 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-20 14:21:14,925 INFO L133 SettingsManager]: * Trace refinement strategy=WOLF [2018-09-20 14:21:14,926 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-20 14:21:14,927 INFO L133 SettingsManager]: * Command for external solver=cvc4nyu --tear-down-incremental --rewrite-divk --print-success --lang smt [2018-09-20 14:21:14,927 INFO L133 SettingsManager]: * Logic for external solver=AUFBV [2018-09-20 14:21:14,927 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 71bb07c94f4fe427420ff52287a2ed237302fad2 [2018-09-20 14:21:14,993 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-20 14:21:15,013 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-20 14:21:15,019 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-20 14:21:15,021 INFO L271 PluginConnector]: Initializing CDTParser... [2018-09-20 14:21:15,022 INFO L276 PluginConnector]: CDTParser initialized [2018-09-20 14:21:15,023 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-benchs/sqrt_biNewton_pseudoconstant_true-unreach-call.c [2018-09-20 14:21:15,377 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b3cd85c0/fe16a7f9f4804d90afaa0464468556cd/FLAG7d2b1cdeb [2018-09-20 14:21:15,568 INFO L277 CDTParser]: Found 1 translation units. [2018-09-20 14:21:15,570 INFO L159 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-benchs/sqrt_biNewton_pseudoconstant_true-unreach-call.c [2018-09-20 14:21:15,581 INFO L325 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b3cd85c0/fe16a7f9f4804d90afaa0464468556cd/FLAG7d2b1cdeb [2018-09-20 14:21:15,612 INFO L333 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b3cd85c0/fe16a7f9f4804d90afaa0464468556cd [2018-09-20 14:21:15,618 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-20 14:21:15,626 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-09-20 14:21:15,629 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-09-20 14:21:15,632 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-09-20 14:21:15,640 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-09-20 14:21:15,642 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 02:21:15" (1/1) ... [2018-09-20 14:21:15,645 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3fcce3ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 02:21:15, skipping insertion in model container [2018-09-20 14:21:15,646 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 02:21:15" (1/1) ... [2018-09-20 14:21:15,660 INFO L160 ieTranslatorObserver]: Starting translation in SV-COMP mode [2018-09-20 14:21:15,939 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-20 14:21:15,967 INFO L424 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-09-20 14:21:16,001 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-20 14:21:16,036 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 02:21:16 WrapperNode [2018-09-20 14:21:16,036 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-09-20 14:21:16,037 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-20 14:21:16,037 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-20 14:21:16,038 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-20 14:21:16,054 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 02:21:16" (1/1) ... [2018-09-20 14:21:16,054 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 02:21:16" (1/1) ... [2018-09-20 14:21:16,069 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 02:21:16" (1/1) ... [2018-09-20 14:21:16,069 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 02:21:16" (1/1) ... [2018-09-20 14:21:16,074 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 02:21:16" (1/1) ... [2018-09-20 14:21:16,080 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 02:21:16" (1/1) ... [2018-09-20 14:21:16,082 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 02:21:16" (1/1) ... [2018-09-20 14:21:16,086 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-20 14:21:16,087 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-20 14:21:16,087 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-20 14:21:16,087 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-20 14:21:16,088 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 02:21:16" (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 [2018-09-20 14:21:16,168 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-09-20 14:21:16,169 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-20 14:21:16,169 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-09-20 14:21:16,169 INFO L138 BoogieDeclarations]: Found implementation of procedure SqrtR [2018-09-20 14:21:16,169 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-20 14:21:16,169 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-09-20 14:21:16,169 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_double [2018-09-20 14:21:16,170 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2018-09-20 14:21:16,170 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-09-20 14:21:16,170 INFO L130 BoogieDeclarations]: Found specification of procedure SqrtR [2018-09-20 14:21:16,170 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-20 14:21:16,170 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-09-20 14:21:16,170 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-20 14:21:26,266 INFO L365 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-20 14:21:26,267 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 02:21:26 BoogieIcfgContainer [2018-09-20 14:21:26,267 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-20 14:21:26,268 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-20 14:21:26,268 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-20 14:21:26,272 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-20 14:21:26,272 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 02:21:15" (1/3) ... [2018-09-20 14:21:26,273 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e24f8b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 02:21:26, skipping insertion in model container [2018-09-20 14:21:26,273 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 02:21:16" (2/3) ... [2018-09-20 14:21:26,274 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e24f8b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 02:21:26, skipping insertion in model container [2018-09-20 14:21:26,274 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 02:21:26" (3/3) ... [2018-09-20 14:21:26,276 INFO L112 eAbstractionObserver]: Analyzing ICFG sqrt_biNewton_pseudoconstant_true-unreach-call.c [2018-09-20 14:21:26,286 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-20 14:21:26,295 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-20 14:21:26,347 INFO L130 ementStrategyFactory]: Using default assertion order modulation [2018-09-20 14:21:26,348 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-20 14:21:26,348 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-20 14:21:26,349 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-20 14:21:26,349 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-20 14:21:26,349 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-20 14:21:26,349 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-20 14:21:26,349 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-20 14:21:26,350 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-20 14:21:26,370 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2018-09-20 14:21:26,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-20 14:21:26,378 INFO L368 BasicCegarLoop]: Found error trace [2018-09-20 14:21:26,379 INFO L376 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-20 14:21:26,381 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-20 14:21:26,387 INFO L82 PathProgramCache]: Analyzing trace with hash 924932034, now seen corresponding path program 1 times [2018-09-20 14:21:26,392 INFO L227 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-09-20 14:21:26,393 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2018-09-20 14:21:26,405 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-20 14:21:28,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-20 14:21:28,214 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-20 14:21:28,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-20 14:21:28,238 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-09-20 14:21:28,276 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-20 14:21:28,277 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-20 14:21:28,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-09-20 14:21:28,294 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-09-20 14:21:28,295 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-09-20 14:21:28,297 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 2 states. [2018-09-20 14:21:28,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-20 14:21:28,326 INFO L93 Difference]: Finished difference Result 56 states and 68 transitions. [2018-09-20 14:21:28,326 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-09-20 14:21:28,327 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 21 [2018-09-20 14:21:28,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-20 14:21:28,337 INFO L225 Difference]: With dead ends: 56 [2018-09-20 14:21:28,337 INFO L226 Difference]: Without dead ends: 26 [2018-09-20 14:21:28,341 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-09-20 14:21:28,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-09-20 14:21:28,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-09-20 14:21:28,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-20 14:21:28,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2018-09-20 14:21:28,385 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 21 [2018-09-20 14:21:28,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-20 14:21:28,386 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2018-09-20 14:21:28,386 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-09-20 14:21:28,386 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2018-09-20 14:21:28,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-20 14:21:28,387 INFO L368 BasicCegarLoop]: Found error trace [2018-09-20 14:21:28,387 INFO L376 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] [2018-09-20 14:21:28,388 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-20 14:21:28,388 INFO L82 PathProgramCache]: Analyzing trace with hash 244023785, now seen corresponding path program 1 times [2018-09-20 14:21:28,389 INFO L227 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-09-20 14:21:28,389 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2018-09-20 14:21:28,397 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-20 14:21:30,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-20 14:21:30,166 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-20 14:21:44,315 WARN L178 SmtUtils]: Spent 10.25 s on a formula simplification. DAG size of input: 31 DAG size of output: 9 [2018-09-20 14:21:44,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-20 14:21:44,329 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-09-20 14:21:44,364 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-20 14:21:44,364 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-09-20 14:21:44,366 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-20 14:21:44,366 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-20 14:21:44,366 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=10, Unknown=1, NotChecked=0, Total=20 [2018-09-20 14:21:44,367 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 5 states. [2018-09-20 14:21:51,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-20 14:21:51,884 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2018-09-20 14:21:51,886 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-20 14:21:51,886 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2018-09-20 14:21:51,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-20 14:21:51,888 INFO L225 Difference]: With dead ends: 49 [2018-09-20 14:21:51,888 INFO L226 Difference]: Without dead ends: 29 [2018-09-20 14:21:51,889 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=9, Invalid=10, Unknown=1, NotChecked=0, Total=20 [2018-09-20 14:21:51,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-20 14:21:51,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-20 14:21:51,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-20 14:21:51,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2018-09-20 14:21:51,897 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 22 [2018-09-20 14:21:51,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-20 14:21:51,897 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2018-09-20 14:21:51,897 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-20 14:21:51,898 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2018-09-20 14:21:51,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-20 14:21:51,899 INFO L368 BasicCegarLoop]: Found error trace [2018-09-20 14:21:51,899 INFO L376 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] [2018-09-20 14:21:51,899 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-20 14:21:51,900 INFO L82 PathProgramCache]: Analyzing trace with hash 502189223, now seen corresponding path program 1 times [2018-09-20 14:21:51,900 INFO L227 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-09-20 14:21:51,900 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2018-09-20 14:21:51,908 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-20 14:21:57,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-20 14:21:57,218 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-20 14:21:57,370 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-09-20 14:21:57,560 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-09-20 14:22:31,618 WARN L178 SmtUtils]: Spent 16.21 s on a formula simplification that was a NOOP. DAG size: 14 [2018-09-20 14:22:34,036 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2018-09-20 14:22:34,037 FATAL L265 ToolchainWalker]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. No stderr output. at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:208) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:225) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:154) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.WrapperScript.checkSat(WrapperScript.java:116) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.managedscript.ManagedScript.checkSat(ManagedScript.java:140) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.MonolithicImplicationChecker.checkImplication(MonolithicImplicationChecker.java:84) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.compare(PredicateUnifier.java:788) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.(PredicateUnifier.java:732) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:338) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:298) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp$UnifyPostprocessor.postprocess(TraceCheckSpWp.java:575) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:439) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:200) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:286) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructForwardBackward(TraceCheckConstructor.java:224) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructTraceCheck(TraceCheckConstructor.java:188) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.get(TraceCheckConstructor.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.MultiTrackRefinementStrategy.getTraceCheck(MultiTrackRefinementStrategy.java:236) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.checkFeasibility(BaseRefinementStrategy.java:224) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.executeStrategy(BaseRefinementStrategy.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:70) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:430) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:434) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:375) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:313) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:124) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1427) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:630) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:419) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:205) ... 39 more [2018-09-20 14:22:34,044 INFO L168 Benchmark]: Toolchain (without parser) took 78424.23 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 116.9 MB). Free memory was 951.8 MB in the beginning and 1.0 GB in the end (delta: -72.8 MB). Peak memory consumption was 44.1 MB. Max. memory is 11.5 GB. [2018-09-20 14:22:34,046 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 1.0 GB. Free memory is still 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-09-20 14:22:34,047 INFO L168 Benchmark]: CACSL2BoogieTranslator took 407.46 ms. Allocated memory is still 1.0 GB. Free memory was 951.8 MB in the beginning and 941.1 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-09-20 14:22:34,048 INFO L168 Benchmark]: Boogie Preprocessor took 49.17 ms. Allocated memory is still 1.0 GB. Free memory was 941.1 MB in the beginning and 935.7 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2018-09-20 14:22:34,050 INFO L168 Benchmark]: RCFGBuilder took 10180.31 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 116.9 MB). Free memory was 935.7 MB in the beginning and 1.1 GB in the end (delta: -151.7 MB). Peak memory consumption was 21.9 MB. Max. memory is 11.5 GB. [2018-09-20 14:22:34,052 INFO L168 Benchmark]: TraceAbstraction took 67774.76 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 62.8 MB). Peak memory consumption was 62.8 MB. Max. memory is 11.5 GB. [2018-09-20 14:22:34,060 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 1.0 GB. Free memory is still 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 407.46 ms. Allocated memory is still 1.0 GB. Free memory was 951.8 MB in the beginning and 941.1 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 49.17 ms. Allocated memory is still 1.0 GB. Free memory was 941.1 MB in the beginning and 935.7 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 10180.31 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 116.9 MB). Free memory was 935.7 MB in the beginning and 1.1 GB in the end (delta: -151.7 MB). Peak memory consumption was 21.9 MB. Max. memory is 11.5 GB. * TraceAbstraction took 67774.76 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 62.8 MB). Peak memory consumption was 62.8 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. No stderr output. de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. No stderr output.: de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:208) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...