/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/Ultimate.py --spec ../../../trunk/examples/svcomp/ReachSafety.prp --file ../../../trunk/examples/svcomp/float-newlib/double_req_bl_1252b_false-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-newlib/double_req_bl_1252b_false-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 68fb7610e598522f7959f4a088cceed304c96257 ........................................................................................................................................................................................................................................................................................................................................................................................ 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-newlib/double_req_bl_1252b_false-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 68fb7610e598522f7959f4a088cceed304c96257 .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.23-40ef509 [2018-09-20 15:32:48,247 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-20 15:32:48,251 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-20 15:32:48,263 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-20 15:32:48,263 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-20 15:32:48,264 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-20 15:32:48,266 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-20 15:32:48,267 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-20 15:32:48,269 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-20 15:32:48,270 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-20 15:32:48,271 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-20 15:32:48,272 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-20 15:32:48,273 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-20 15:32:48,274 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-20 15:32:48,278 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-20 15:32:48,279 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-20 15:32:48,280 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-20 15:32:48,285 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-20 15:32:48,290 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-20 15:32:48,295 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-20 15:32:48,298 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-20 15:32:48,302 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-20 15:32:48,308 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-20 15:32:48,308 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-20 15:32:48,308 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-20 15:32:48,309 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-20 15:32:48,312 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-20 15:32:48,313 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-20 15:32:48,314 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-20 15:32:48,319 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-20 15:32:48,319 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-20 15:32:48,323 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-09-20 15:32:48,324 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-09-20 15:32:48,324 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-09-20 15:32:48,325 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-09-20 15:32:48,327 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-09-20 15:32:48,328 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-09-20 15:32:48,355 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-20 15:32:48,356 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-20 15:32:48,357 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-20 15:32:48,357 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-20 15:32:48,358 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-20 15:32:48,359 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-20 15:32:48,359 INFO L133 SettingsManager]: * Use SBE=true [2018-09-20 15:32:48,360 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-20 15:32:48,360 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-20 15:32:48,360 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-20 15:32:48,360 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-20 15:32:48,360 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-20 15:32:48,362 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-20 15:32:48,362 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-20 15:32:48,362 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-20 15:32:48,362 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-20 15:32:48,363 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-20 15:32:48,363 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-20 15:32:48,363 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-20 15:32:48,363 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-20 15:32:48,365 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-20 15:32:48,365 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-20 15:32:48,365 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-20 15:32:48,366 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-20 15:32:48,366 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-20 15:32:48,366 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-20 15:32:48,367 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-20 15:32:48,367 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-20 15:32:48,367 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-20 15:32:48,367 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 -> 68fb7610e598522f7959f4a088cceed304c96257 [2018-09-20 15:32:48,436 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-20 15:32:48,449 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-20 15:32:48,454 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-20 15:32:48,455 INFO L271 PluginConnector]: Initializing CDTParser... [2018-09-20 15:32:48,456 INFO L276 PluginConnector]: CDTParser initialized [2018-09-20 15:32:48,457 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/double_req_bl_1252b_false-unreach-call.c [2018-09-20 15:32:48,816 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3706d7e6/97094d107cc34d919663a350417cced2/FLAG769e370b9 [2018-09-20 15:32:48,987 INFO L277 CDTParser]: Found 1 translation units. [2018-09-20 15:32:48,987 INFO L159 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/double_req_bl_1252b_false-unreach-call.c [2018-09-20 15:32:48,995 INFO L325 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3706d7e6/97094d107cc34d919663a350417cced2/FLAG769e370b9 [2018-09-20 15:32:49,010 INFO L333 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3706d7e6/97094d107cc34d919663a350417cced2 [2018-09-20 15:32:49,015 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-20 15:32:49,017 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-09-20 15:32:49,018 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-09-20 15:32:49,018 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-09-20 15:32:49,025 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-09-20 15:32:49,026 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 03:32:49" (1/1) ... [2018-09-20 15:32:49,030 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@682d7878 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 03:32:49, skipping insertion in model container [2018-09-20 15:32:49,030 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 03:32:49" (1/1) ... [2018-09-20 15:32:49,043 INFO L160 ieTranslatorObserver]: Starting translation in SV-COMP mode [2018-09-20 15:32:49,273 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-20 15:32:49,292 INFO L424 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-09-20 15:32:49,316 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-20 15:32:49,343 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 03:32:49 WrapperNode [2018-09-20 15:32:49,344 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-09-20 15:32:49,345 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-20 15:32:49,345 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-20 15:32:49,345 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-20 15:32:49,363 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 03:32:49" (1/1) ... [2018-09-20 15:32:49,363 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 03:32:49" (1/1) ... [2018-09-20 15:32:49,374 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 03:32:49" (1/1) ... [2018-09-20 15:32:49,375 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 03:32:49" (1/1) ... [2018-09-20 15:32:49,382 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 03:32:49" (1/1) ... [2018-09-20 15:32:49,388 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 03:32:49" (1/1) ... [2018-09-20 15:32:49,390 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 03:32:49" (1/1) ... [2018-09-20 15:32:49,393 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-20 15:32:49,394 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-20 15:32:49,394 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-20 15:32:49,394 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-20 15:32:49,395 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 03:32:49" (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 15:32:49,457 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-09-20 15:32:49,457 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-20 15:32:49,458 INFO L138 BoogieDeclarations]: Found implementation of procedure __fpclassify_double [2018-09-20 15:32:49,458 INFO L138 BoogieDeclarations]: Found implementation of procedure fmax_double [2018-09-20 15:32:49,458 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_double [2018-09-20 15:32:49,458 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-20 15:32:49,458 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-09-20 15:32:49,458 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_double [2018-09-20 15:32:49,458 INFO L130 BoogieDeclarations]: Found specification of procedure __fpclassify_double [2018-09-20 15:32:49,459 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-09-20 15:32:49,459 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2018-09-20 15:32:49,459 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2018-09-20 15:32:49,459 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-09-20 15:32:49,459 INFO L130 BoogieDeclarations]: Found specification of procedure fmax_double [2018-09-20 15:32:49,462 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_double [2018-09-20 15:32:49,462 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-20 15:32:49,462 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-09-20 15:32:49,462 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-20 15:32:49,462 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~real [2018-09-20 15:32:49,462 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2018-09-20 15:32:49,463 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2018-09-20 15:32:49,463 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2018-09-20 15:32:50,117 INFO L365 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-20 15:32:50,118 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 03:32:50 BoogieIcfgContainer [2018-09-20 15:32:50,118 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-20 15:32:50,119 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-20 15:32:50,119 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-20 15:32:50,123 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-20 15:32:50,124 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 03:32:49" (1/3) ... [2018-09-20 15:32:50,125 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76ab9bed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 03:32:50, skipping insertion in model container [2018-09-20 15:32:50,125 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 03:32:49" (2/3) ... [2018-09-20 15:32:50,126 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76ab9bed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 03:32:50, skipping insertion in model container [2018-09-20 15:32:50,126 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 03:32:50" (3/3) ... [2018-09-20 15:32:50,129 INFO L112 eAbstractionObserver]: Analyzing ICFG double_req_bl_1252b_false-unreach-call.c [2018-09-20 15:32:50,140 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-20 15:32:50,150 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-20 15:32:50,202 INFO L130 ementStrategyFactory]: Using default assertion order modulation [2018-09-20 15:32:50,203 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-20 15:32:50,203 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-20 15:32:50,203 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-20 15:32:50,204 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-20 15:32:50,204 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-20 15:32:50,204 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-20 15:32:50,204 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-20 15:32:50,204 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-20 15:32:50,226 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states. [2018-09-20 15:32:50,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-20 15:32:50,233 INFO L368 BasicCegarLoop]: Found error trace [2018-09-20 15:32:50,235 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 15:32:50,237 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-20 15:32:50,242 INFO L82 PathProgramCache]: Analyzing trace with hash -2005512365, now seen corresponding path program 1 times [2018-09-20 15:32:50,244 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-20 15:32:50,245 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-20 15:32:50,295 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-20 15:32:50,295 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-20 15:32:50,295 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-20 15:32:50,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-20 15:32:50,390 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 15:32:50,393 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-20 15:32:50,393 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-20 15:32:50,397 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-09-20 15:32:50,409 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-09-20 15:32:50,410 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-09-20 15:32:50,412 INFO L87 Difference]: Start difference. First operand 64 states. Second operand 2 states. [2018-09-20 15:32:50,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-20 15:32:50,442 INFO L93 Difference]: Finished difference Result 119 states and 147 transitions. [2018-09-20 15:32:50,442 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-09-20 15:32:50,443 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 22 [2018-09-20 15:32:50,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-20 15:32:50,455 INFO L225 Difference]: With dead ends: 119 [2018-09-20 15:32:50,456 INFO L226 Difference]: Without dead ends: 60 [2018-09-20 15:32:50,460 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 15:32:50,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-09-20 15:32:50,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-09-20 15:32:50,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-09-20 15:32:50,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2018-09-20 15:32:50,515 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 22 [2018-09-20 15:32:50,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-20 15:32:50,516 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2018-09-20 15:32:50,516 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-09-20 15:32:50,516 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2018-09-20 15:32:50,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-09-20 15:32:50,519 INFO L368 BasicCegarLoop]: Found error trace [2018-09-20 15:32:50,519 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-20 15:32:50,519 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-20 15:32:50,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1797088685, now seen corresponding path program 1 times [2018-09-20 15:32:50,520 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-20 15:32:50,520 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-20 15:32:50,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-20 15:32:50,522 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-20 15:32:50,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-20 15:32:50,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-20 15:32:50,763 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 15:32:50,764 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-20 15:32:50,764 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-20 15:32:50,767 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-20 15:32:50,767 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-20 15:32:50,767 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-09-20 15:32:50,768 INFO L87 Difference]: Start difference. First operand 60 states and 68 transitions. Second operand 4 states. [2018-09-20 15:32:50,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-20 15:32:50,949 INFO L93 Difference]: Finished difference Result 87 states and 97 transitions. [2018-09-20 15:32:50,950 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-20 15:32:50,950 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 35 [2018-09-20 15:32:50,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-20 15:32:50,954 INFO L225 Difference]: With dead ends: 87 [2018-09-20 15:32:50,954 INFO L226 Difference]: Without dead ends: 64 [2018-09-20 15:32:50,955 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-09-20 15:32:50,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-09-20 15:32:50,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-09-20 15:32:50,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-09-20 15:32:50,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 73 transitions. [2018-09-20 15:32:50,967 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 73 transitions. Word has length 35 [2018-09-20 15:32:50,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-20 15:32:50,968 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 73 transitions. [2018-09-20 15:32:50,968 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-20 15:32:50,968 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 73 transitions. [2018-09-20 15:32:50,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-20 15:32:50,969 INFO L368 BasicCegarLoop]: Found error trace [2018-09-20 15:32:50,970 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-20 15:32:50,970 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-20 15:32:50,970 INFO L82 PathProgramCache]: Analyzing trace with hash -957411872, now seen corresponding path program 1 times [2018-09-20 15:32:50,970 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-20 15:32:50,970 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-20 15:32:50,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-20 15:32:50,972 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-20 15:32:50,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-20 15:32:50,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-20 15:32:51,150 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 15:32:51,151 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-20 15:32:51,151 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-20 15:32:51,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-20 15:32:51,152 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-20 15:32:51,152 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-09-20 15:32:51,156 INFO L87 Difference]: Start difference. First operand 64 states and 73 transitions. Second operand 4 states. [2018-09-20 15:32:51,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-20 15:32:51,227 INFO L93 Difference]: Finished difference Result 91 states and 102 transitions. [2018-09-20 15:32:51,232 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-20 15:32:51,232 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 38 [2018-09-20 15:32:51,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-20 15:32:51,234 INFO L225 Difference]: With dead ends: 91 [2018-09-20 15:32:51,234 INFO L226 Difference]: Without dead ends: 68 [2018-09-20 15:32:51,235 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-09-20 15:32:51,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-09-20 15:32:51,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 64. [2018-09-20 15:32:51,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-09-20 15:32:51,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 73 transitions. [2018-09-20 15:32:51,245 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 73 transitions. Word has length 38 [2018-09-20 15:32:51,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-20 15:32:51,246 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 73 transitions. [2018-09-20 15:32:51,246 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-20 15:32:51,246 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 73 transitions. [2018-09-20 15:32:51,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-20 15:32:51,248 INFO L368 BasicCegarLoop]: Found error trace [2018-09-20 15:32:51,248 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-20 15:32:51,248 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-20 15:32:51,248 INFO L82 PathProgramCache]: Analyzing trace with hash 1540604065, now seen corresponding path program 1 times [2018-09-20 15:32:51,249 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-20 15:32:51,249 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-20 15:32:51,250 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-20 15:32:51,250 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-20 15:32:51,250 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-20 15:32:51,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-09-20 15:32:51,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-09-20 15:32:51,369 INFO L443 BasicCegarLoop]: Counterexample might be feasible [2018-09-20 15:32:51,405 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.09 03:32:51 BoogieIcfgContainer [2018-09-20 15:32:51,405 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-20 15:32:51,405 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-09-20 15:32:51,405 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-09-20 15:32:51,406 INFO L276 PluginConnector]: Witness Printer initialized [2018-09-20 15:32:51,406 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 03:32:50" (3/4) ... [2018-09-20 15:32:51,411 INFO L147 WitnessPrinter]: No result that supports witness generation found [2018-09-20 15:32:51,411 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-09-20 15:32:51,412 INFO L168 Benchmark]: Toolchain (without parser) took 2397.24 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 133.7 MB). Free memory was 951.9 MB in the beginning and 1.0 GB in the end (delta: -94.4 MB). Peak memory consumption was 39.3 MB. Max. memory is 11.5 GB. [2018-09-20 15:32:51,414 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 15:32:51,415 INFO L168 Benchmark]: CACSL2BoogieTranslator took 326.52 ms. Allocated memory is still 1.0 GB. Free memory was 951.9 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 15:32:51,415 INFO L168 Benchmark]: Boogie Preprocessor took 48.65 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 15:32:51,416 INFO L168 Benchmark]: RCFGBuilder took 724.49 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 133.7 MB). Free memory was 935.7 MB in the beginning and 1.1 GB in the end (delta: -158.8 MB). Peak memory consumption was 22.0 MB. Max. memory is 11.5 GB. [2018-09-20 15:32:51,417 INFO L168 Benchmark]: TraceAbstraction took 1285.89 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 41.3 MB). Peak memory consumption was 41.3 MB. Max. memory is 11.5 GB. [2018-09-20 15:32:51,418 INFO L168 Benchmark]: Witness Printer took 6.30 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 6.9 MB). Peak memory consumption was 6.9 MB. Max. memory is 11.5 GB. [2018-09-20 15:32:51,423 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 326.52 ms. Allocated memory is still 1.0 GB. Free memory was 951.9 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 48.65 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 724.49 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 133.7 MB). Free memory was 935.7 MB in the beginning and 1.1 GB in the end (delta: -158.8 MB). Peak memory consumption was 22.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1285.89 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 41.3 MB). Peak memory consumption was 41.3 MB. Max. memory is 11.5 GB. * Witness Printer took 6.30 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 6.9 MB). Peak memory consumption was 6.9 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 85]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryDOUBLEComparisonOperation at line 84, overapproximation of someUnaryDOUBLEoperation at line 80. Possible FailurePath: [L79] double x = 0.0; [L80] double y = -0.0; VAL [x=0] [L81] CALL, EXPR fmax_double(x, y) VAL [\old(x)=0, \old(y)=4294967300] [L52] CALL, EXPR __fpclassify_double(x) VAL [\old(x)=0] [L24] __uint32_t msw, lsw; VAL [\old(x)=0, x=0] [L27] FCALL ieee_double_shape_type ew_u; VAL [\old(x)=0, ew_u={4294967301:0}, x=0] [L28] FCALL ew_u.value = (x) VAL [\old(x)=0, ew_u={4294967301:0}, x=0] [L29] EXPR, FCALL ew_u.parts.msw VAL [\old(x)=0, ew_u={4294967301:0}, ew_u.parts.msw=4293918721, x=0] [L29] (msw) = ew_u.parts.msw VAL [\old(x)=0, ew_u={4294967301:0}, ew_u.parts.msw=4293918721, msw=4293918721, x=0] [L29] FCALL (msw) = ew_u.parts.msw VAL [(msw) = ew_u.parts.msw=4294967298, \old(x)=0, ew_u={4294967301:0}, ew_u.parts.msw=4293918721, msw=4293918721, x=0] [L30] EXPR, FCALL ew_u.parts.lsw VAL [\old(x)=0, ew_u={4294967301:0}, ew_u.parts.lsw=4294967297, msw=4293918721, x=0] [L30] (lsw) = ew_u.parts.lsw VAL [\old(x)=0, ew_u={4294967301:0}, ew_u.parts.lsw=4294967297, lsw=4294967297, msw=4293918721, x=0] [L30] FCALL (lsw) = ew_u.parts.lsw VAL [(lsw) = ew_u.parts.lsw=4294967303, \old(x)=0, ew_u={4294967301:0}, ew_u.parts.lsw=4294967297, lsw=4294967297, msw=4293918721, x=0] [L31] COND FALSE !(0) VAL [\old(x)=0, lsw=4294967297, msw=4293918721, x=0] [L33-L34] COND FALSE !((msw == 0x00000000 && lsw == 0x00000000) || (msw == 0x80000000 && lsw == 0x00000000)) VAL [\old(x)=0, lsw=4294967297, msw=4293918721, x=0] [L36-L37] COND FALSE !((msw >= 0x00100000 && msw <= 0x7fefffff) || (msw >= 0x80100000 && msw <= 0xffefffff)) VAL [\old(x)=0, lsw=4294967297, msw=4293918721, x=0] [L39-L40] COND FALSE !((msw >= 0x00000000 && msw <= 0x000fffff) || (msw >= 0x80000000 && msw <= 0x800fffff)) VAL [\old(x)=0, lsw=4294967297, msw=4293918721, x=0] [L43-L44] COND FALSE !((msw == 0x7ff00000 && lsw == 0x00000000) || (msw == 0xfff00000 && lsw == 0x00000000)) [L47] RET return 0; VAL [\old(x)=0, \result=0, lsw=4294967297, msw=4293918721, x=0] [L52] EXPR __fpclassify_double(x) VAL [\old(x)=0, \old(y)=4294967300, __fpclassify_double(x)=0, x=0, y=4294967300] [L52] COND TRUE __fpclassify_double(x) == 0 [L53] RET return y; VAL [\old(x)=0, \old(y)=4294967300, \result=4294967300, x=0, y=4294967300] [L81] EXPR fmax_double(x, y) VAL [fmax_double(x, y)=4294967300, x=0, y=4294967300] [L81] double res = fmax_double(x, y); [L84] EXPR res == 0.0 && __signbit_double(res) == 0 VAL [res=4294967300, res == 0.0 && __signbit_double(res) == 0=0, x=0, y=4294967300] [L84] COND FALSE, EXPR !(res == 0.0 && __signbit_double(res) == 0) VAL [res=4294967300, res == 0.0 && __signbit_double(res) == 0=0, x=0, y=4294967300] [L84] COND TRUE !(res == 0.0 && __signbit_double(res) == 0) [L85] __VERIFIER_error() VAL [res=4294967300, x=0, y=4294967300] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 64 locations, 1 error locations. UNSAFE Result, 1.2s OverallTime, 4 OverallIterations, 1 TraceHistogramMax, 0.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 209 SDtfs, 0 SDslu, 258 SDs, 0 SdLazy, 21 SolverSat, 2 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=64occurred 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, 3 MinimizatonAttempts, 4 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 133 NumberOfCodeBlocks, 133 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 92 ConstructedInterpolants, 0 QuantifiedInterpolants, 3534 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 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 15:32:53,824 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-20 15:32:53,826 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-20 15:32:53,840 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-20 15:32:53,840 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-20 15:32:53,842 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-20 15:32:53,843 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-20 15:32:53,845 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-20 15:32:53,847 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-20 15:32:53,848 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-20 15:32:53,849 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-20 15:32:53,849 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-20 15:32:53,850 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-20 15:32:53,851 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-20 15:32:53,852 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-20 15:32:53,853 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-20 15:32:53,854 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-20 15:32:53,856 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-20 15:32:53,858 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-20 15:32:53,860 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-20 15:32:53,861 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-20 15:32:53,863 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-20 15:32:53,865 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-20 15:32:53,866 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-20 15:32:53,866 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-20 15:32:53,867 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-20 15:32:53,868 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-20 15:32:53,869 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-20 15:32:53,870 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-20 15:32:53,872 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-20 15:32:53,872 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-20 15:32:53,873 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-09-20 15:32:53,873 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-09-20 15:32:53,873 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-09-20 15:32:53,874 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-09-20 15:32:53,875 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-09-20 15:32:53,875 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2018-09-20 15:32:53,892 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-20 15:32:53,892 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-20 15:32:53,893 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-20 15:32:53,893 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-20 15:32:53,894 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-20 15:32:53,894 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-20 15:32:53,894 INFO L133 SettingsManager]: * Use SBE=true [2018-09-20 15:32:53,895 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-20 15:32:53,895 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-20 15:32:53,895 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-20 15:32:53,895 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-20 15:32:53,896 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-20 15:32:53,896 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-20 15:32:53,896 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-20 15:32:53,896 INFO L133 SettingsManager]: * Use bitvectors instead of ints=true [2018-09-20 15:32:53,896 INFO L133 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2018-09-20 15:32:53,897 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-20 15:32:53,897 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-20 15:32:53,897 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-20 15:32:53,897 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-20 15:32:53,898 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-20 15:32:53,898 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-20 15:32:53,898 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-20 15:32:53,898 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-20 15:32:53,898 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-20 15:32:53,899 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-20 15:32:53,899 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-20 15:32:53,899 INFO L133 SettingsManager]: * Trace refinement strategy=WOLF [2018-09-20 15:32:53,899 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-20 15:32:53,900 INFO L133 SettingsManager]: * Command for external solver=cvc4nyu --tear-down-incremental --rewrite-divk --print-success --lang smt [2018-09-20 15:32:53,900 INFO L133 SettingsManager]: * Logic for external solver=AUFBV [2018-09-20 15:32:53,900 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 -> 68fb7610e598522f7959f4a088cceed304c96257 [2018-09-20 15:32:53,973 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-20 15:32:53,992 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-20 15:32:53,998 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-20 15:32:54,000 INFO L271 PluginConnector]: Initializing CDTParser... [2018-09-20 15:32:54,000 INFO L276 PluginConnector]: CDTParser initialized [2018-09-20 15:32:54,002 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/double_req_bl_1252b_false-unreach-call.c [2018-09-20 15:32:54,313 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f0ed7cdbf/94f2d087b0764120b1aec9c1ef67870c/FLAG920722e60 [2018-09-20 15:32:54,557 INFO L277 CDTParser]: Found 1 translation units. [2018-09-20 15:32:54,558 INFO L159 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/double_req_bl_1252b_false-unreach-call.c [2018-09-20 15:32:54,566 INFO L325 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f0ed7cdbf/94f2d087b0764120b1aec9c1ef67870c/FLAG920722e60 [2018-09-20 15:32:54,583 INFO L333 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f0ed7cdbf/94f2d087b0764120b1aec9c1ef67870c [2018-09-20 15:32:54,588 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-20 15:32:54,592 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-09-20 15:32:54,594 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-09-20 15:32:54,594 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-09-20 15:32:54,601 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-09-20 15:32:54,602 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 03:32:54" (1/1) ... [2018-09-20 15:32:54,605 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b9aa049 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 03:32:54, skipping insertion in model container [2018-09-20 15:32:54,605 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 03:32:54" (1/1) ... [2018-09-20 15:32:54,618 INFO L160 ieTranslatorObserver]: Starting translation in SV-COMP mode [2018-09-20 15:32:54,874 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-20 15:32:54,894 INFO L424 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-09-20 15:32:54,912 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-20 15:32:54,950 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 03:32:54 WrapperNode [2018-09-20 15:32:54,951 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-09-20 15:32:54,952 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-20 15:32:54,952 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-20 15:32:54,952 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-20 15:32:54,968 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 03:32:54" (1/1) ... [2018-09-20 15:32:54,968 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 03:32:54" (1/1) ... [2018-09-20 15:32:54,984 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 03:32:54" (1/1) ... [2018-09-20 15:32:54,985 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 03:32:54" (1/1) ... [2018-09-20 15:32:55,006 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 03:32:54" (1/1) ... [2018-09-20 15:32:55,018 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 03:32:54" (1/1) ... [2018-09-20 15:32:55,020 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 03:32:54" (1/1) ... [2018-09-20 15:32:55,025 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-20 15:32:55,026 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-20 15:32:55,026 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-20 15:32:55,026 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-20 15:32:55,027 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 03:32:54" (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 15:32:55,174 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-09-20 15:32:55,175 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-20 15:32:55,175 INFO L138 BoogieDeclarations]: Found implementation of procedure __fpclassify_double [2018-09-20 15:32:55,175 INFO L138 BoogieDeclarations]: Found implementation of procedure fmax_double [2018-09-20 15:32:55,175 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_double [2018-09-20 15:32:55,175 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-20 15:32:55,175 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-09-20 15:32:55,176 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_double [2018-09-20 15:32:55,176 INFO L130 BoogieDeclarations]: Found specification of procedure __fpclassify_double [2018-09-20 15:32:55,176 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-09-20 15:32:55,176 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE8 [2018-09-20 15:32:55,176 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2018-09-20 15:32:55,177 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-09-20 15:32:55,177 INFO L130 BoogieDeclarations]: Found specification of procedure fmax_double [2018-09-20 15:32:55,177 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_double [2018-09-20 15:32:55,178 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-20 15:32:55,178 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-09-20 15:32:55,178 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-20 15:32:55,178 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2018-09-20 15:32:55,178 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2018-09-20 15:32:55,178 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intFLOATTYPE8 [2018-09-20 15:32:55,178 INFO L130 BoogieDeclarations]: Found specification of procedure read~intFLOATTYPE8 [2018-09-20 15:32:55,355 WARN L312 ript$VariableManager]: TermVariabe |q#valueAsBitvector| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-09-20 15:32:55,402 WARN L312 ript$VariableManager]: TermVariabe |q#valueAsBitvector| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-09-20 15:32:55,689 WARN L312 ript$VariableManager]: TermVariabe |q#valueAsBitvector| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-09-20 15:32:55,717 WARN L312 ript$VariableManager]: TermVariabe |q#valueAsBitvector| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-09-20 15:32:55,730 WARN L312 ript$VariableManager]: TermVariabe |q#valueAsBitvector| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-09-20 15:32:55,788 INFO L365 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-20 15:32:55,788 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 03:32:55 BoogieIcfgContainer [2018-09-20 15:32:55,789 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-20 15:32:55,790 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-20 15:32:55,790 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-20 15:32:55,794 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-20 15:32:55,795 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 03:32:54" (1/3) ... [2018-09-20 15:32:55,796 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fbbe2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 03:32:55, skipping insertion in model container [2018-09-20 15:32:55,796 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 03:32:54" (2/3) ... [2018-09-20 15:32:55,796 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fbbe2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 03:32:55, skipping insertion in model container [2018-09-20 15:32:55,797 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 03:32:55" (3/3) ... [2018-09-20 15:32:55,799 INFO L112 eAbstractionObserver]: Analyzing ICFG double_req_bl_1252b_false-unreach-call.c [2018-09-20 15:32:55,810 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-20 15:32:55,821 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-20 15:32:55,867 INFO L130 ementStrategyFactory]: Using default assertion order modulation [2018-09-20 15:32:55,868 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-20 15:32:55,868 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-20 15:32:55,868 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-20 15:32:55,868 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-20 15:32:55,868 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-20 15:32:55,868 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-20 15:32:55,868 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-20 15:32:55,869 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-20 15:32:55,887 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states. [2018-09-20 15:32:55,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-20 15:32:55,895 INFO L368 BasicCegarLoop]: Found error trace [2018-09-20 15:32:55,896 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 15:32:55,899 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-20 15:32:55,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1225609055, now seen corresponding path program 1 times [2018-09-20 15:32:55,910 INFO L227 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-09-20 15:32:55,910 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 15:32:55,923 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-20 15:32:55,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-20 15:32:55,996 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-20 15:32:56,016 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 15:32:56,017 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-09-20 15:32:56,034 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-20 15:32:56,034 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-20 15:32:56,038 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-09-20 15:32:56,052 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-09-20 15:32:56,052 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-09-20 15:32:56,056 INFO L87 Difference]: Start difference. First operand 62 states. Second operand 2 states. [2018-09-20 15:32:56,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-20 15:32:56,089 INFO L93 Difference]: Finished difference Result 115 states and 143 transitions. [2018-09-20 15:32:56,089 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-09-20 15:32:56,091 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 21 [2018-09-20 15:32:56,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-20 15:32:56,103 INFO L225 Difference]: With dead ends: 115 [2018-09-20 15:32:56,103 INFO L226 Difference]: Without dead ends: 58 [2018-09-20 15:32:56,108 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 15:32:56,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-09-20 15:32:56,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-09-20 15:32:56,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-09-20 15:32:56,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2018-09-20 15:32:56,156 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 21 [2018-09-20 15:32:56,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-20 15:32:56,156 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2018-09-20 15:32:56,157 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-09-20 15:32:56,157 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2018-09-20 15:32:56,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-20 15:32:56,160 INFO L368 BasicCegarLoop]: Found error trace [2018-09-20 15:32:56,160 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-20 15:32:56,160 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-20 15:32:56,161 INFO L82 PathProgramCache]: Analyzing trace with hash 132746963, now seen corresponding path program 1 times [2018-09-20 15:32:56,162 INFO L227 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-09-20 15:32:56,162 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) [2018-09-20 15:32:56,174 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2018-09-20 15:32:56,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-20 15:32:56,266 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-20 15:32:56,345 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 15:32:56,345 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-09-20 15:32:56,362 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-20 15:32:56,362 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-20 15:32:56,364 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-20 15:32:56,365 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-20 15:32:56,366 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-09-20 15:32:56,366 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand 4 states. [2018-09-20 15:32:56,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-20 15:32:56,540 INFO L93 Difference]: Finished difference Result 84 states and 94 transitions. [2018-09-20 15:32:56,542 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-20 15:32:56,542 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 34 [2018-09-20 15:32:56,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-20 15:32:56,550 INFO L225 Difference]: With dead ends: 84 [2018-09-20 15:32:56,551 INFO L226 Difference]: Without dead ends: 61 [2018-09-20 15:32:56,552 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-09-20 15:32:56,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-20 15:32:56,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-09-20 15:32:56,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-09-20 15:32:56,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 70 transitions. [2018-09-20 15:32:56,567 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 70 transitions. Word has length 34 [2018-09-20 15:32:56,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-20 15:32:56,567 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 70 transitions. [2018-09-20 15:32:56,568 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-20 15:32:56,568 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 70 transitions. [2018-09-20 15:32:56,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-09-20 15:32:56,569 INFO L368 BasicCegarLoop]: Found error trace [2018-09-20 15:32:56,570 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-20 15:32:56,571 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-20 15:32:56,571 INFO L82 PathProgramCache]: Analyzing trace with hash 201431320, now seen corresponding path program 1 times [2018-09-20 15:32:56,573 INFO L227 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-09-20 15:32:56,573 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 15:32:56,584 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-20 15:32:56,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-20 15:32:56,677 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-20 15:32:56,814 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 11 [2018-09-20 15:32:56,825 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 10 [2018-09-20 15:32:56,825 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-09-20 15:32:56,833 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-09-20 15:32:56,915 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-09-20 15:32:56,916 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:24, output treesize:20 [2018-09-20 15:32:57,072 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2018-09-20 15:32:57,088 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 4 [2018-09-20 15:32:57,089 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-09-20 15:32:57,113 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-09-20 15:32:57,190 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-09-20 15:32:57,190 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:29, output treesize:14 [2018-09-20 15:32:57,827 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 15:32:57,827 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-09-20 15:32:57,841 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-20 15:32:57,841 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2018-09-20 15:32:57,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-20 15:32:57,843 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-20 15:32:57,843 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-09-20 15:32:57,843 INFO L87 Difference]: Start difference. First operand 61 states and 70 transitions. Second operand 10 states. [2018-09-20 15:32:58,607 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2018-09-20 15:32:58,915 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-09-20 15:33:00,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-20 15:33:00,057 INFO L93 Difference]: Finished difference Result 91 states and 107 transitions. [2018-09-20 15:33:00,059 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-20 15:33:00,059 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 35 [2018-09-20 15:33:00,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-20 15:33:00,061 INFO L225 Difference]: With dead ends: 91 [2018-09-20 15:33:00,062 INFO L226 Difference]: Without dead ends: 63 [2018-09-20 15:33:00,063 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2018-09-20 15:33:00,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-20 15:33:00,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-09-20 15:33:00,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-09-20 15:33:00,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 72 transitions. [2018-09-20 15:33:00,074 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 72 transitions. Word has length 35 [2018-09-20 15:33:00,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-20 15:33:00,075 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 72 transitions. [2018-09-20 15:33:00,075 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-20 15:33:00,075 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 72 transitions. [2018-09-20 15:33:00,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-20 15:33:00,077 INFO L368 BasicCegarLoop]: Found error trace [2018-09-20 15:33:00,078 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-20 15:33:00,078 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-20 15:33:00,078 INFO L82 PathProgramCache]: Analyzing trace with hash 1544592367, now seen corresponding path program 1 times [2018-09-20 15:33:00,080 INFO L227 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-09-20 15:33:00,080 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2018-09-20 15:33:00,084 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-20 15:33:00,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-20 15:33:00,151 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-20 15:33:00,206 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 15:33:00,206 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-09-20 15:33:00,217 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-20 15:33:00,218 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-20 15:33:00,219 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-20 15:33:00,219 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-20 15:33:00,219 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-09-20 15:33:00,219 INFO L87 Difference]: Start difference. First operand 63 states and 72 transitions. Second operand 4 states. [2018-09-20 15:33:00,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-20 15:33:00,277 INFO L93 Difference]: Finished difference Result 89 states and 100 transitions. [2018-09-20 15:33:00,282 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-20 15:33:00,282 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 36 [2018-09-20 15:33:00,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-20 15:33:00,283 INFO L225 Difference]: With dead ends: 89 [2018-09-20 15:33:00,284 INFO L226 Difference]: Without dead ends: 66 [2018-09-20 15:33:00,284 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-09-20 15:33:00,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-09-20 15:33:00,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 63. [2018-09-20 15:33:00,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-09-20 15:33:00,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 72 transitions. [2018-09-20 15:33:00,295 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 72 transitions. Word has length 36 [2018-09-20 15:33:00,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-20 15:33:00,296 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 72 transitions. [2018-09-20 15:33:00,296 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-20 15:33:00,296 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 72 transitions. [2018-09-20 15:33:00,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-09-20 15:33:00,298 INFO L368 BasicCegarLoop]: Found error trace [2018-09-20 15:33:00,299 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-20 15:33:00,299 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-20 15:33:00,300 INFO L82 PathProgramCache]: Analyzing trace with hash -553142156, now seen corresponding path program 1 times [2018-09-20 15:33:00,300 INFO L227 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-09-20 15:33:00,300 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 6 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with mathsat -unsat_core_generation=3 [2018-09-20 15:33:00,307 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-20 15:33:00,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-20 15:33:00,370 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-20 15:33:00,428 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 11 [2018-09-20 15:33:00,436 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 10 [2018-09-20 15:33:00,437 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-09-20 15:33:00,442 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-09-20 15:33:00,460 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-09-20 15:33:00,460 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:24, output treesize:20 [2018-09-20 15:33:00,516 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2018-09-20 15:33:00,521 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 4 [2018-09-20 15:33:00,521 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-09-20 15:33:00,525 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-09-20 15:33:00,536 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-09-20 15:33:00,536 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:29, output treesize:14 [2018-09-20 15:33:00,753 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 15:33:00,754 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-09-20 15:33:00,768 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-20 15:33:00,769 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2018-09-20 15:33:00,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-20 15:33:00,769 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-20 15:33:00,770 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-09-20 15:33:00,770 INFO L87 Difference]: Start difference. First operand 63 states and 72 transitions. Second operand 10 states. [2018-09-20 15:33:01,342 WARN L178 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2018-09-20 15:33:03,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-20 15:33:03,105 INFO L93 Difference]: Finished difference Result 90 states and 104 transitions. [2018-09-20 15:33:03,106 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-20 15:33:03,106 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2018-09-20 15:33:03,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-20 15:33:03,108 INFO L225 Difference]: With dead ends: 90 [2018-09-20 15:33:03,108 INFO L226 Difference]: Without dead ends: 62 [2018-09-20 15:33:03,110 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2018-09-20 15:33:03,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-09-20 15:33:03,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2018-09-20 15:33:03,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-09-20 15:33:03,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 67 transitions. [2018-09-20 15:33:03,119 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 67 transitions. Word has length 37 [2018-09-20 15:33:03,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-20 15:33:03,119 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 67 transitions. [2018-09-20 15:33:03,120 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-20 15:33:03,120 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 67 transitions. [2018-09-20 15:33:03,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-09-20 15:33:03,122 INFO L368 BasicCegarLoop]: Found error trace [2018-09-20 15:33:03,123 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-20 15:33:03,123 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-20 15:33:03,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1819330129, now seen corresponding path program 1 times [2018-09-20 15:33:03,124 INFO L227 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-09-20 15:33:03,125 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 7 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with mathsat -unsat_core_generation=3 [2018-09-20 15:33:03,130 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-20 15:33:03,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-20 15:33:03,227 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-20 15:33:03,247 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-09-20 15:33:03,247 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-09-20 15:33:03,261 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-20 15:33:03,262 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-20 15:33:03,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-20 15:33:03,262 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-20 15:33:03,264 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-09-20 15:33:03,264 INFO L87 Difference]: Start difference. First operand 60 states and 67 transitions. Second operand 4 states. [2018-09-20 15:33:03,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-20 15:33:03,368 INFO L93 Difference]: Finished difference Result 86 states and 95 transitions. [2018-09-20 15:33:03,370 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-20 15:33:03,370 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 54 [2018-09-20 15:33:03,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-20 15:33:03,378 INFO L225 Difference]: With dead ends: 86 [2018-09-20 15:33:03,378 INFO L226 Difference]: Without dead ends: 63 [2018-09-20 15:33:03,379 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-09-20 15:33:03,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-20 15:33:03,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-09-20 15:33:03,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-09-20 15:33:03,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 71 transitions. [2018-09-20 15:33:03,393 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 71 transitions. Word has length 54 [2018-09-20 15:33:03,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-20 15:33:03,394 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 71 transitions. [2018-09-20 15:33:03,394 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-20 15:33:03,394 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 71 transitions. [2018-09-20 15:33:03,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-09-20 15:33:03,400 INFO L368 BasicCegarLoop]: Found error trace [2018-09-20 15:33:03,400 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 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 15:33:03,401 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-20 15:33:03,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1654387358, now seen corresponding path program 1 times [2018-09-20 15:33:03,401 INFO L227 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-09-20 15:33:03,401 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 8 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2018-09-20 15:33:03,416 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 8 with mathsat -unsat_core_generation=3 [2018-09-20 15:33:03,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-20 15:33:03,520 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-20 15:33:03,578 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 11 [2018-09-20 15:33:03,584 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 10 [2018-09-20 15:33:03,585 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-09-20 15:33:03,591 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-09-20 15:33:03,605 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-09-20 15:33:03,606 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:24, output treesize:20 [2018-09-20 15:33:03,652 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2018-09-20 15:33:03,659 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 4 [2018-09-20 15:33:03,659 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-09-20 15:33:03,663 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-09-20 15:33:03,672 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-09-20 15:33:03,673 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:29, output treesize:14 [2018-09-20 15:33:04,046 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-20 15:33:04,047 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-09-20 15:33:04,063 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-20 15:33:04,063 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2018-09-20 15:33:04,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-20 15:33:04,064 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-20 15:33:04,064 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-09-20 15:33:04,064 INFO L87 Difference]: Start difference. First operand 63 states and 71 transitions. Second operand 10 states. [2018-09-20 15:33:08,891 WARN L178 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2018-09-20 15:33:08,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-20 15:33:08,996 INFO L93 Difference]: Finished difference Result 91 states and 101 transitions. [2018-09-20 15:33:08,998 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-20 15:33:08,999 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 55 [2018-09-20 15:33:08,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-20 15:33:09,000 INFO L225 Difference]: With dead ends: 91 [2018-09-20 15:33:09,000 INFO L226 Difference]: Without dead ends: 63 [2018-09-20 15:33:09,001 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2018-09-20 15:33:09,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-20 15:33:09,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-09-20 15:33:09,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-09-20 15:33:09,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 70 transitions. [2018-09-20 15:33:09,010 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 70 transitions. Word has length 55 [2018-09-20 15:33:09,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-20 15:33:09,010 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 70 transitions. [2018-09-20 15:33:09,010 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-20 15:33:09,011 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 70 transitions. [2018-09-20 15:33:09,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-20 15:33:09,013 INFO L368 BasicCegarLoop]: Found error trace [2018-09-20 15:33:09,014 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 15:33:09,014 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-20 15:33:09,014 INFO L82 PathProgramCache]: Analyzing trace with hash -953708108, now seen corresponding path program 1 times [2018-09-20 15:33:09,014 INFO L227 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-09-20 15:33:09,015 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 9 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with mathsat -unsat_core_generation=3 [2018-09-20 15:33:09,023 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-20 15:33:09,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-20 15:33:09,143 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-20 15:33:09,368 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-20 15:33:09,369 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-09-20 15:33:09,381 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-20 15:33:09,381 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-09-20 15:33:09,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-20 15:33:09,382 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-20 15:33:09,382 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-09-20 15:33:09,382 INFO L87 Difference]: Start difference. First operand 63 states and 70 transitions. Second operand 5 states. [2018-09-20 15:33:11,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-20 15:33:11,046 INFO L93 Difference]: Finished difference Result 87 states and 94 transitions. [2018-09-20 15:33:11,047 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-20 15:33:11,047 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 56 [2018-09-20 15:33:11,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-20 15:33:11,048 INFO L225 Difference]: With dead ends: 87 [2018-09-20 15:33:11,048 INFO L226 Difference]: Without dead ends: 63 [2018-09-20 15:33:11,049 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-09-20 15:33:11,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-20 15:33:11,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-09-20 15:33:11,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-09-20 15:33:11,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 69 transitions. [2018-09-20 15:33:11,057 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 69 transitions. Word has length 56 [2018-09-20 15:33:11,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-20 15:33:11,057 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 69 transitions. [2018-09-20 15:33:11,057 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-20 15:33:11,058 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 69 transitions. [2018-09-20 15:33:11,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-20 15:33:11,060 INFO L368 BasicCegarLoop]: Found error trace [2018-09-20 15:33:11,060 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 15:33:11,061 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-20 15:33:11,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1763054734, now seen corresponding path program 1 times [2018-09-20 15:33:11,061 INFO L227 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-09-20 15:33:11,062 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 10 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with mathsat -unsat_core_generation=3 [2018-09-20 15:33:11,072 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-20 15:33:11,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-20 15:33:11,163 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-20 15:33:11,272 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-20 15:33:11,273 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-09-20 15:33:11,284 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-20 15:33:11,284 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-09-20 15:33:11,285 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-20 15:33:11,285 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-20 15:33:11,285 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-09-20 15:33:11,286 INFO L87 Difference]: Start difference. First operand 63 states and 69 transitions. Second operand 8 states. [2018-09-20 15:33:11,676 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2018-09-20 15:33:11,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-20 15:33:11,807 INFO L93 Difference]: Finished difference Result 70 states and 76 transitions. [2018-09-20 15:33:11,809 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-20 15:33:11,809 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 56 [2018-09-20 15:33:11,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-20 15:33:11,810 INFO L225 Difference]: With dead ends: 70 [2018-09-20 15:33:11,810 INFO L226 Difference]: Without dead ends: 67 [2018-09-20 15:33:11,811 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2018-09-20 15:33:11,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-09-20 15:33:11,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-09-20 15:33:11,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-09-20 15:33:11,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 73 transitions. [2018-09-20 15:33:11,818 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 73 transitions. Word has length 56 [2018-09-20 15:33:11,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-20 15:33:11,818 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 73 transitions. [2018-09-20 15:33:11,818 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-20 15:33:11,818 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 73 transitions. [2018-09-20 15:33:11,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-20 15:33:11,821 INFO L368 BasicCegarLoop]: Found error trace [2018-09-20 15:33:11,821 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 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 15:33:11,821 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-20 15:33:11,822 INFO L82 PathProgramCache]: Analyzing trace with hash -1622182773, now seen corresponding path program 1 times [2018-09-20 15:33:11,822 INFO L227 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-09-20 15:33:11,822 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 11 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with mathsat -unsat_core_generation=3 [2018-09-20 15:33:11,828 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-20 15:33:11,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-20 15:33:11,922 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-20 15:33:11,961 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-09-20 15:33:11,962 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-09-20 15:33:11,973 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-20 15:33:11,973 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-20 15:33:11,973 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-20 15:33:11,974 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-20 15:33:11,974 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-09-20 15:33:11,974 INFO L87 Difference]: Start difference. First operand 67 states and 73 transitions. Second operand 4 states. [2018-09-20 15:33:12,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-20 15:33:12,034 INFO L93 Difference]: Finished difference Result 91 states and 98 transitions. [2018-09-20 15:33:12,034 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-20 15:33:12,034 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 56 [2018-09-20 15:33:12,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-20 15:33:12,035 INFO L225 Difference]: With dead ends: 91 [2018-09-20 15:33:12,035 INFO L226 Difference]: Without dead ends: 68 [2018-09-20 15:33:12,036 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-09-20 15:33:12,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-09-20 15:33:12,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 65. [2018-09-20 15:33:12,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-09-20 15:33:12,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 70 transitions. [2018-09-20 15:33:12,043 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 70 transitions. Word has length 56 [2018-09-20 15:33:12,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-20 15:33:12,045 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 70 transitions. [2018-09-20 15:33:12,045 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-20 15:33:12,045 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 70 transitions. [2018-09-20 15:33:12,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-09-20 15:33:12,047 INFO L368 BasicCegarLoop]: Found error trace [2018-09-20 15:33:12,047 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-20 15:33:12,047 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-20 15:33:12,047 INFO L82 PathProgramCache]: Analyzing trace with hash -1409894658, now seen corresponding path program 1 times [2018-09-20 15:33:12,048 INFO L227 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-09-20 15:33:12,048 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 12 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with mathsat -unsat_core_generation=3 [2018-09-20 15:33:12,062 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-20 15:33:12,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-20 15:33:12,170 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-20 15:33:12,277 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 11 [2018-09-20 15:33:12,284 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 10 [2018-09-20 15:33:12,284 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-09-20 15:33:12,290 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-09-20 15:33:12,305 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-09-20 15:33:12,305 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:24, output treesize:20 [2018-09-20 15:33:12,350 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2018-09-20 15:33:12,360 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 4 [2018-09-20 15:33:12,360 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-09-20 15:33:12,364 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-09-20 15:33:12,373 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-09-20 15:33:12,374 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:29, output treesize:14 [2018-09-20 15:33:12,802 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-20 15:33:12,803 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-09-20 15:33:12,814 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-20 15:33:12,814 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2018-09-20 15:33:12,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-20 15:33:12,815 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-20 15:33:12,815 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-09-20 15:33:12,815 INFO L87 Difference]: Start difference. First operand 65 states and 70 transitions. Second operand 10 states. [2018-09-20 15:33:14,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-20 15:33:14,913 INFO L93 Difference]: Finished difference Result 90 states and 94 transitions. [2018-09-20 15:33:14,915 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-20 15:33:14,915 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 57 [2018-09-20 15:33:14,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-20 15:33:14,916 INFO L225 Difference]: With dead ends: 90 [2018-09-20 15:33:14,916 INFO L226 Difference]: Without dead ends: 57 [2018-09-20 15:33:14,917 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2018-09-20 15:33:14,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-20 15:33:14,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-09-20 15:33:14,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-09-20 15:33:14,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2018-09-20 15:33:14,923 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 57 [2018-09-20 15:33:14,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-20 15:33:14,923 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2018-09-20 15:33:14,923 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-20 15:33:14,928 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2018-09-20 15:33:14,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-09-20 15:33:14,929 INFO L368 BasicCegarLoop]: Found error trace [2018-09-20 15:33:14,929 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-20 15:33:14,930 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-20 15:33:14,930 INFO L82 PathProgramCache]: Analyzing trace with hash -245978473, now seen corresponding path program 1 times [2018-09-20 15:33:14,930 INFO L227 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-09-20 15:33:14,932 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 13 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with mathsat -unsat_core_generation=3 [2018-09-20 15:33:14,937 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-20 15:33:15,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-09-20 15:33:15,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-09-20 15:33:15,375 INFO L443 BasicCegarLoop]: Counterexample might be feasible [2018-09-20 15:33:15,463 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.09 03:33:15 BoogieIcfgContainer [2018-09-20 15:33:15,464 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-20 15:33:15,465 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-09-20 15:33:15,465 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-09-20 15:33:15,465 INFO L276 PluginConnector]: Witness Printer initialized [2018-09-20 15:33:15,466 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 03:32:55" (3/4) ... [2018-09-20 15:33:15,476 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-09-20 15:33:15,648 INFO L145 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2018-09-20 15:33:15,648 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-09-20 15:33:15,651 INFO L168 Benchmark]: Toolchain (without parser) took 21060.48 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 208.7 MB). Free memory was 953.2 MB in the beginning and 977.7 MB in the end (delta: -24.5 MB). Peak memory consumption was 184.2 MB. Max. memory is 11.5 GB. [2018-09-20 15:33:15,652 INFO L168 Benchmark]: CDTParser took 0.28 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 15:33:15,653 INFO L168 Benchmark]: CACSL2BoogieTranslator took 357.37 ms. Allocated memory is still 1.0 GB. Free memory was 953.2 MB in the beginning and 942.4 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-09-20 15:33:15,653 INFO L168 Benchmark]: Boogie Preprocessor took 73.21 ms. Allocated memory is still 1.0 GB. Free memory was 942.4 MB in the beginning and 937.1 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2018-09-20 15:33:15,654 INFO L168 Benchmark]: RCFGBuilder took 763.20 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 148.4 MB). Free memory was 937.1 MB in the beginning and 1.1 GB in the end (delta: -174.2 MB). Peak memory consumption was 22.1 MB. Max. memory is 11.5 GB. [2018-09-20 15:33:15,654 INFO L168 Benchmark]: TraceAbstraction took 19674.11 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 60.3 MB). Free memory was 1.1 GB in the beginning and 977.7 MB in the end (delta: 133.6 MB). Peak memory consumption was 193.9 MB. Max. memory is 11.5 GB. [2018-09-20 15:33:15,657 INFO L168 Benchmark]: Witness Printer took 183.82 ms. Allocated memory is still 1.2 GB. Free memory was 977.7 MB in the beginning and 977.7 MB in the end (delta: 24 B). Peak memory consumption was 24 B. Max. memory is 11.5 GB. [2018-09-20 15:33:15,665 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 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 357.37 ms. Allocated memory is still 1.0 GB. Free memory was 953.2 MB in the beginning and 942.4 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 73.21 ms. Allocated memory is still 1.0 GB. Free memory was 942.4 MB in the beginning and 937.1 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 763.20 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 148.4 MB). Free memory was 937.1 MB in the beginning and 1.1 GB in the end (delta: -174.2 MB). Peak memory consumption was 22.1 MB. Max. memory is 11.5 GB. * TraceAbstraction took 19674.11 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 60.3 MB). Free memory was 1.1 GB in the beginning and 977.7 MB in the end (delta: 133.6 MB). Peak memory consumption was 193.9 MB. Max. memory is 11.5 GB. * Witness Printer took 183.82 ms. Allocated memory is still 1.2 GB. Free memory was 977.7 MB in the beginning and 977.7 MB in the end (delta: 24 B). Peak memory consumption was 24 B. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 85]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L79] double x = 0.0; [L80] double y = -0.0; VAL [x=0.0, y=0.0] [L81] CALL, EXPR fmax_double(x, y) VAL [\old(x)=0.0, \old(y)=0.0] [L52] CALL, EXPR __fpclassify_double(x) VAL [\old(x)=0.0] [L24] __uint32_t msw, lsw; VAL [\old(x)=0.0, x=0.0] [L27] FCALL ieee_double_shape_type ew_u; VAL [\old(x)=0.0, ew_u={2:0}, x=0.0] [L28] FCALL ew_u.value = (x) VAL [\old(x)=0.0, ew_u={2:0}, x=0.0] [L29] EXPR, FCALL ew_u.parts.msw VAL [\old(x)=0.0, ew_u={2:0}, ew_u.parts.msw=0, x=0.0] [L29] (msw) = ew_u.parts.msw VAL [\old(x)=0.0, ew_u={2:0}, ew_u.parts.msw=0, msw=0, x=0.0] [L29] FCALL (msw) = ew_u.parts.msw VAL [(msw) = ew_u.parts.msw=0.0, \old(x)=0.0, ew_u={2:0}, ew_u.parts.msw=0, msw=0, x=0.0] [L30] EXPR, FCALL ew_u.parts.lsw VAL [\old(x)=0.0, ew_u={2:0}, ew_u.parts.lsw=0, msw=0, x=0.0] [L30] (lsw) = ew_u.parts.lsw VAL [\old(x)=0.0, ew_u={2:0}, ew_u.parts.lsw=0, lsw=0, msw=0, x=0.0] [L30] FCALL (lsw) = ew_u.parts.lsw VAL [(lsw) = ew_u.parts.lsw=0.0, \old(x)=0.0, ew_u={2:0}, ew_u.parts.lsw=0, lsw=0, msw=0, x=0.0] [L31] COND FALSE !(0) VAL [\old(x)=0.0, lsw=0, msw=0, x=0.0] [L33-L34] COND TRUE (msw == 0x00000000 && lsw == 0x00000000) || (msw == 0x80000000 && lsw == 0x00000000) [L35] RET return 2; VAL [\old(x)=0.0, \result=2, lsw=0, msw=0, x=0.0] [L52] EXPR __fpclassify_double(x) VAL [\old(x)=0.0, \old(y)=0.0, __fpclassify_double(x)=2, x=0.0, y=0.0] [L52] COND FALSE !(__fpclassify_double(x) == 0) [L54] CALL, EXPR __fpclassify_double(y) VAL [\old(x)=0.0] [L24] __uint32_t msw, lsw; VAL [\old(x)=0.0, x=0.0] [L27] FCALL ieee_double_shape_type ew_u; VAL [\old(x)=0.0, ew_u={3:0}, x=0.0] [L28] FCALL ew_u.value = (x) VAL [\old(x)=0.0, ew_u={3:0}, x=0.0] [L29] EXPR, FCALL ew_u.parts.msw VAL [\old(x)=0.0, ew_u={3:0}, ew_u.parts.msw=-2147483648, x=0.0] [L29] (msw) = ew_u.parts.msw VAL [\old(x)=0.0, ew_u={3:0}, ew_u.parts.msw=-2147483648, msw=-2147483648, x=0.0] [L29] FCALL (msw) = ew_u.parts.msw VAL [(msw) = ew_u.parts.msw=0.0, \old(x)=0.0, ew_u={3:0}, ew_u.parts.msw=-2147483648, msw=-2147483648, x=0.0] [L30] EXPR, FCALL ew_u.parts.lsw VAL [\old(x)=0.0, ew_u={3:0}, ew_u.parts.lsw=0, msw=-2147483648, x=0.0] [L30] (lsw) = ew_u.parts.lsw VAL [\old(x)=0.0, ew_u={3:0}, ew_u.parts.lsw=0, lsw=0, msw=-2147483648, x=0.0] [L30] FCALL (lsw) = ew_u.parts.lsw VAL [(lsw) = ew_u.parts.lsw=0.0, \old(x)=0.0, ew_u={3:0}, ew_u.parts.lsw=0, lsw=0, msw=-2147483648, x=0.0] [L31] COND FALSE !(0) VAL [\old(x)=0.0, lsw=0, msw=-2147483648, x=0.0] [L33-L34] COND TRUE (msw == 0x00000000 && lsw == 0x00000000) || (msw == 0x80000000 && lsw == 0x00000000) [L35] RET return 2; VAL [\old(x)=0.0, \result=2, lsw=0, msw=-2147483648, x=0.0] [L54] EXPR __fpclassify_double(y) VAL [\old(x)=0.0, \old(y)=0.0, __fpclassify_double(y)=2, x=0.0, y=0.0] [L54] COND FALSE !(__fpclassify_double(y) == 0) [L57] COND FALSE, EXPR !(x > y ? x : y) [L57] EXPR x > y ? x : y VAL [\old(x)=0.0, \old(y)=0.0, x=0.0, x > y ? x : y=0.0, y=0.0] [L57] RET return x > y ? x : y; [L81] EXPR fmax_double(x, y) VAL [fmax_double(x, y)=0.0, x=0.0, y=0.0] [L81] double res = fmax_double(x, y); [L84] EXPR res == 0.0 && __signbit_double(res) == 0 VAL [res=0.0, res == 0.0 && __signbit_double(res) == 0=1, x=0.0, y=0.0] [L84] COND TRUE, EXPR res == 0.0 && __signbit_double(res) == 0 VAL [res=0.0, res == 0.0 && __signbit_double(res) == 0=1, x=0.0, y=0.0] [L84] CALL, EXPR __signbit_double(res) VAL [\old(x)=0.0] [L61] __uint32_t msw; VAL [\old(x)=0.0, x=0.0] [L64] FCALL ieee_double_shape_type gh_u; VAL [\old(x)=0.0, gh_u={3:0}, x=0.0] [L65] FCALL gh_u.value = (x) VAL [\old(x)=0.0, gh_u={3:0}, x=0.0] [L66] EXPR, FCALL gh_u.parts.msw VAL [\old(x)=0.0, gh_u={3:0}, gh_u.parts.msw=-2147483648, x=0.0] [L66] (msw) = gh_u.parts.msw VAL [\old(x)=0.0, gh_u={3:0}, gh_u.parts.msw=-2147483648, msw=2147483648, x=0.0] [L66] FCALL (msw) = gh_u.parts.msw VAL [(msw) = gh_u.parts.msw=0.0, \old(x)=0.0, gh_u={3:0}, gh_u.parts.msw=-2147483648, msw=2147483648, x=0.0] [L67] COND FALSE !(0) VAL [\old(x)=0.0, msw=2147483648, x=0.0] [L69] RET return (msw & 0x80000000) != 0; VAL [\old(x)=0.0, \result=1, msw=2147483648, x=0.0] [L84] EXPR __signbit_double(res) VAL [__signbit_double(res)=1, res=0.0, res == 0.0 && __signbit_double(res) == 0=1, x=0.0, y=0.0] [L84] EXPR res == 0.0 && __signbit_double(res) == 0 VAL [__signbit_double(res)=1, res=0.0, res == 0.0 && __signbit_double(res) == 0=0, x=0.0, y=0.0] [L84] COND TRUE !(res == 0.0 && __signbit_double(res) == 0) [L85] __VERIFIER_error() VAL [res=0.0, x=0.0, y=0.0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 62 locations, 1 error locations. UNSAFE Result, 19.5s OverallTime, 12 OverallIterations, 2 TraceHistogramMax, 14.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 647 SDtfs, 241 SDslu, 2277 SDs, 0 SdLazy, 844 SolverSat, 30 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 10.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 523 GetRequests, 440 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 5.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=67occurred in iteration=9, 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: 0.1s AutomataMinimizationTime, 11 MinimizatonAttempts, 8 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 3.3s InterpolantComputationTime, 569 NumberOfCodeBlocks, 569 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 486 ConstructedInterpolants, 76 QuantifiedInterpolants, 96909 SizeOfPredicates, 39 NumberOfNonLiveVariables, 1085 ConjunctsInSsa, 69 ConjunctsInUnsatCore, 11 InterpolantComputations, 11 PerfectInterpolantSequences, 108/108 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...