./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/float-newlib/float_req_bl_1230.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9a8b2e8d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -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 ../sv-benchmarks/c/float-newlib/float_req_bl_1230.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(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3712292932a14caaa681695c17d35c29cbe1c2a4 .............................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -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 ../sv-benchmarks/c/float-newlib/float_req_bl_1230.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(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3712292932a14caaa681695c17d35c29cbe1c2a4 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-9a8b2e8 [2020-10-20 00:40:09,207 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 00:40:09,209 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 00:40:09,233 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 00:40:09,233 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 00:40:09,234 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 00:40:09,236 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 00:40:09,238 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 00:40:09,239 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 00:40:09,240 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 00:40:09,241 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 00:40:09,242 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 00:40:09,243 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 00:40:09,243 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 00:40:09,245 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 00:40:09,246 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 00:40:09,246 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 00:40:09,248 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 00:40:09,250 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 00:40:09,252 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 00:40:09,254 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 00:40:09,260 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 00:40:09,262 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 00:40:09,262 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 00:40:09,265 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 00:40:09,265 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 00:40:09,266 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 00:40:09,267 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 00:40:09,268 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 00:40:09,269 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 00:40:09,269 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 00:40:09,270 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 00:40:09,270 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 00:40:09,271 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 00:40:09,273 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 00:40:09,274 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 00:40:09,274 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 00:40:09,274 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 00:40:09,275 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 00:40:09,277 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 00:40:09,277 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 00:40:09,278 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-20 00:40:09,325 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 00:40:09,325 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 00:40:09,329 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 00:40:09,329 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 00:40:09,329 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 00:40:09,329 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 00:40:09,329 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 00:40:09,330 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-20 00:40:09,330 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 00:40:09,330 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 00:40:09,330 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-20 00:40:09,330 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 00:40:09,331 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-20 00:40:09,331 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 00:40:09,332 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-20 00:40:09,332 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 00:40:09,333 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-20 00:40:09,333 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 00:40:09,333 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 00:40:09,334 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 00:40:09,334 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 00:40:09,334 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 00:40:09,334 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 00:40:09,334 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 00:40:09,335 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-20 00:40:09,335 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-20 00:40:09,335 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-20 00:40:09,335 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-20 00:40:09,335 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 00:40:09,335 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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(reach_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 -> 3712292932a14caaa681695c17d35c29cbe1c2a4 [2020-10-20 00:40:09,553 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 00:40:09,566 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 00:40:09,571 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 00:40:09,574 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 00:40:09,575 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 00:40:09,576 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-newlib/float_req_bl_1230.c [2020-10-20 00:40:09,639 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/485788cc2/fe8505aff7094895b75b48052ab2b05a/FLAGaa446d674 [2020-10-20 00:40:10,128 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 00:40:10,129 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-newlib/float_req_bl_1230.c [2020-10-20 00:40:10,140 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/485788cc2/fe8505aff7094895b75b48052ab2b05a/FLAGaa446d674 [2020-10-20 00:40:10,484 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/485788cc2/fe8505aff7094895b75b48052ab2b05a [2020-10-20 00:40:10,488 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 00:40:10,495 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-20 00:40:10,497 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 00:40:10,497 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 00:40:10,500 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 00:40:10,501 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:40:10" (1/1) ... [2020-10-20 00:40:10,504 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@324cb358 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:10, skipping insertion in model container [2020-10-20 00:40:10,505 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:40:10" (1/1) ... [2020-10-20 00:40:10,513 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 00:40:10,532 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 00:40:10,780 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:40:10,789 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 00:40:10,815 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:40:10,836 INFO L208 MainTranslator]: Completed translation [2020-10-20 00:40:10,836 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:10 WrapperNode [2020-10-20 00:40:10,836 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 00:40:10,838 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-20 00:40:10,838 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-20 00:40:10,838 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-20 00:40:10,844 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:10" (1/1) ... [2020-10-20 00:40:10,854 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:10" (1/1) ... [2020-10-20 00:40:10,880 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-20 00:40:10,880 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 00:40:10,880 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 00:40:10,880 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 00:40:10,889 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:10" (1/1) ... [2020-10-20 00:40:10,890 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:10" (1/1) ... [2020-10-20 00:40:10,892 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:10" (1/1) ... [2020-10-20 00:40:10,893 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:10" (1/1) ... [2020-10-20 00:40:10,900 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:10" (1/1) ... [2020-10-20 00:40:10,906 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:10" (1/1) ... [2020-10-20 00:40:10,908 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:10" (1/1) ... [2020-10-20 00:40:10,912 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 00:40:10,912 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 00:40:10,912 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 00:40:10,912 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 00:40:10,913 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:10" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 00:40:10,977 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-20 00:40:10,977 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 00:40:10,977 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-10-20 00:40:10,978 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 00:40:10,978 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 00:40:10,978 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-20 00:40:10,978 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-20 00:40:11,291 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 00:40:11,292 INFO L298 CfgBuilder]: Removed 18 assume(true) statements. [2020-10-20 00:40:11,295 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:40:11 BoogieIcfgContainer [2020-10-20 00:40:11,295 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 00:40:11,297 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 00:40:11,298 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 00:40:11,303 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 00:40:11,304 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 12:40:10" (1/3) ... [2020-10-20 00:40:11,305 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54e06543 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:40:11, skipping insertion in model container [2020-10-20 00:40:11,306 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:10" (2/3) ... [2020-10-20 00:40:11,306 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54e06543 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:40:11, skipping insertion in model container [2020-10-20 00:40:11,307 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:40:11" (3/3) ... [2020-10-20 00:40:11,309 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1230.c [2020-10-20 00:40:11,333 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 00:40:11,342 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-20 00:40:11,359 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-20 00:40:11,387 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 00:40:11,387 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-20 00:40:11,388 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 00:40:11,388 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 00:40:11,388 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 00:40:11,388 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 00:40:11,389 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 00:40:11,389 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 00:40:11,407 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-10-20 00:40:11,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-20 00:40:11,414 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:40:11,416 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:40:11,416 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:40:11,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:40:11,422 INFO L82 PathProgramCache]: Analyzing trace with hash -958093107, now seen corresponding path program 1 times [2020-10-20 00:40:11,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:40:11,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889249072] [2020-10-20 00:40:11,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:40:11,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:40:11,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:40:11,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889249072] [2020-10-20 00:40:11,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:40:11,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-20 00:40:11,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683279274] [2020-10-20 00:40:11,588 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-20 00:40:11,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:40:11,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-20 00:40:11,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-20 00:40:11,607 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 2 states. [2020-10-20 00:40:11,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:40:11,627 INFO L93 Difference]: Finished difference Result 55 states and 85 transitions. [2020-10-20 00:40:11,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-20 00:40:11,629 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-10-20 00:40:11,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:40:11,641 INFO L225 Difference]: With dead ends: 55 [2020-10-20 00:40:11,642 INFO L226 Difference]: Without dead ends: 25 [2020-10-20 00:40:11,658 INFO L677 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 [2020-10-20 00:40:11,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-20 00:40:11,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-20 00:40:11,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-20 00:40:11,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 35 transitions. [2020-10-20 00:40:11,697 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 35 transitions. Word has length 10 [2020-10-20 00:40:11,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:40:11,697 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 35 transitions. [2020-10-20 00:40:11,698 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-20 00:40:11,698 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 35 transitions. [2020-10-20 00:40:11,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-20 00:40:11,699 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:40:11,699 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:40:11,699 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-20 00:40:11,700 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:40:11,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:40:11,700 INFO L82 PathProgramCache]: Analyzing trace with hash 1001566992, now seen corresponding path program 1 times [2020-10-20 00:40:11,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:40:11,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616002648] [2020-10-20 00:40:11,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:40:11,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:40:11,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:40:11,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616002648] [2020-10-20 00:40:11,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:40:11,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 00:40:11,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982476181] [2020-10-20 00:40:11,849 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 00:40:11,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:40:11,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 00:40:11,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 00:40:11,851 INFO L87 Difference]: Start difference. First operand 25 states and 35 transitions. Second operand 4 states. [2020-10-20 00:40:11,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:40:11,949 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2020-10-20 00:40:11,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 00:40:11,950 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-10-20 00:40:11,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:40:11,951 INFO L225 Difference]: With dead ends: 41 [2020-10-20 00:40:11,951 INFO L226 Difference]: Without dead ends: 36 [2020-10-20 00:40:11,952 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 00:40:11,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-20 00:40:11,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 27. [2020-10-20 00:40:11,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-20 00:40:11,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2020-10-20 00:40:11,959 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 11 [2020-10-20 00:40:11,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:40:11,960 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2020-10-20 00:40:11,960 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 00:40:11,960 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2020-10-20 00:40:11,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-20 00:40:11,961 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:40:11,961 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:40:11,962 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-20 00:40:11,962 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:40:11,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:40:11,963 INFO L82 PathProgramCache]: Analyzing trace with hash 502183504, now seen corresponding path program 1 times [2020-10-20 00:40:11,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:40:11,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447971891] [2020-10-20 00:40:11,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:40:11,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:40:12,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:40:12,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447971891] [2020-10-20 00:40:12,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:40:12,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 00:40:12,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539434514] [2020-10-20 00:40:12,023 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 00:40:12,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:40:12,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 00:40:12,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 00:40:12,024 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand 4 states. [2020-10-20 00:40:12,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:40:12,070 INFO L93 Difference]: Finished difference Result 43 states and 54 transitions. [2020-10-20 00:40:12,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 00:40:12,071 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-10-20 00:40:12,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:40:12,072 INFO L225 Difference]: With dead ends: 43 [2020-10-20 00:40:12,073 INFO L226 Difference]: Without dead ends: 38 [2020-10-20 00:40:12,073 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 00:40:12,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-20 00:40:12,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 27. [2020-10-20 00:40:12,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-20 00:40:12,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2020-10-20 00:40:12,079 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 12 [2020-10-20 00:40:12,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:40:12,080 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2020-10-20 00:40:12,080 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 00:40:12,080 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2020-10-20 00:40:12,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-20 00:40:12,081 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:40:12,082 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:40:12,082 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-20 00:40:12,082 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:40:12,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:40:12,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1951251627, now seen corresponding path program 1 times [2020-10-20 00:40:12,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:40:12,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389476085] [2020-10-20 00:40:12,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:40:12,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:40:12,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:40:12,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389476085] [2020-10-20 00:40:12,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:40:12,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 00:40:12,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309883654] [2020-10-20 00:40:12,148 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 00:40:12,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:40:12,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 00:40:12,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 00:40:12,149 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand 4 states. [2020-10-20 00:40:12,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:40:12,211 INFO L93 Difference]: Finished difference Result 45 states and 56 transitions. [2020-10-20 00:40:12,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 00:40:12,211 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-10-20 00:40:12,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:40:12,213 INFO L225 Difference]: With dead ends: 45 [2020-10-20 00:40:12,213 INFO L226 Difference]: Without dead ends: 40 [2020-10-20 00:40:12,213 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 00:40:12,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-20 00:40:12,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 27. [2020-10-20 00:40:12,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-20 00:40:12,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2020-10-20 00:40:12,219 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 13 [2020-10-20 00:40:12,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:40:12,219 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2020-10-20 00:40:12,219 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 00:40:12,219 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2020-10-20 00:40:12,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-20 00:40:12,220 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:40:12,220 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:40:12,220 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-20 00:40:12,221 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:40:12,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:40:12,221 INFO L82 PathProgramCache]: Analyzing trace with hash -555778251, now seen corresponding path program 1 times [2020-10-20 00:40:12,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:40:12,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060653454] [2020-10-20 00:40:12,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:40:12,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:40:12,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:40:12,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060653454] [2020-10-20 00:40:12,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:40:12,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 00:40:12,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738375227] [2020-10-20 00:40:12,274 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 00:40:12,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:40:12,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 00:40:12,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 00:40:12,277 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand 4 states. [2020-10-20 00:40:12,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:40:12,346 INFO L93 Difference]: Finished difference Result 43 states and 54 transitions. [2020-10-20 00:40:12,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 00:40:12,347 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-10-20 00:40:12,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:40:12,348 INFO L225 Difference]: With dead ends: 43 [2020-10-20 00:40:12,348 INFO L226 Difference]: Without dead ends: 38 [2020-10-20 00:40:12,349 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 00:40:12,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-20 00:40:12,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 27. [2020-10-20 00:40:12,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-20 00:40:12,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2020-10-20 00:40:12,358 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 14 [2020-10-20 00:40:12,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:40:12,359 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2020-10-20 00:40:12,359 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 00:40:12,359 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2020-10-20 00:40:12,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-20 00:40:12,361 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:40:12,361 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:40:12,362 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-20 00:40:12,362 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:40:12,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:40:12,364 INFO L82 PathProgramCache]: Analyzing trace with hash 1219229111, now seen corresponding path program 1 times [2020-10-20 00:40:12,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:40:12,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713022367] [2020-10-20 00:40:12,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:40:12,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 00:40:12,429 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 00:40:12,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 00:40:12,452 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 00:40:12,479 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 00:40:12,479 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-20 00:40:12,479 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-20 00:40:12,514 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 12:40:12 BoogieIcfgContainer [2020-10-20 00:40:12,515 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-20 00:40:12,515 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 00:40:12,515 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 00:40:12,515 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 00:40:12,516 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:40:11" (3/4) ... [2020-10-20 00:40:12,520 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-10-20 00:40:12,520 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 00:40:12,523 INFO L168 Benchmark]: Toolchain (without parser) took 2032.28 ms. Allocated memory was 34.6 MB in the beginning and 48.8 MB in the end (delta: 14.2 MB). Free memory was 15.4 MB in the beginning and 25.8 MB in the end (delta: -10.5 MB). Peak memory consumption was 3.7 MB. Max. memory is 14.3 GB. [2020-10-20 00:40:12,524 INFO L168 Benchmark]: CDTParser took 0.70 ms. Allocated memory is still 33.0 MB. Free memory was 10.4 MB in the beginning and 10.4 MB in the end (delta: 43.7 kB). Peak memory consumption was 43.7 kB. Max. memory is 14.3 GB. [2020-10-20 00:40:12,525 INFO L168 Benchmark]: CACSL2BoogieTranslator took 340.14 ms. Allocated memory was 34.6 MB in the beginning and 44.0 MB in the end (delta: 9.4 MB). Free memory was 14.4 MB in the beginning and 24.6 MB in the end (delta: -10.1 MB). Peak memory consumption was 11.0 MB. Max. memory is 14.3 GB. [2020-10-20 00:40:12,526 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.22 ms. Allocated memory is still 44.0 MB. Free memory was 24.6 MB in the beginning and 22.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 14.3 GB. [2020-10-20 00:40:12,526 INFO L168 Benchmark]: Boogie Preprocessor took 31.71 ms. Allocated memory is still 44.0 MB. Free memory was 22.5 MB in the beginning and 20.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 14.3 GB. [2020-10-20 00:40:12,527 INFO L168 Benchmark]: RCFGBuilder took 383.28 ms. Allocated memory was 44.0 MB in the beginning and 45.6 MB in the end (delta: 1.6 MB). Free memory was 20.9 MB in the beginning and 13.0 MB in the end (delta: 7.9 MB). Peak memory consumption was 9.5 MB. Max. memory is 14.3 GB. [2020-10-20 00:40:12,528 INFO L168 Benchmark]: TraceAbstraction took 1217.37 ms. Allocated memory was 45.6 MB in the beginning and 48.8 MB in the end (delta: 3.1 MB). Free memory was 12.6 MB in the beginning and 26.2 MB in the end (delta: -13.6 MB). There was no memory consumed. Max. memory is 14.3 GB. [2020-10-20 00:40:12,529 INFO L168 Benchmark]: Witness Printer took 5.13 ms. Allocated memory is still 48.8 MB. Free memory was 26.2 MB in the beginning and 25.8 MB in the end (delta: 369.4 kB). Peak memory consumption was 369.4 kB. Max. memory is 14.3 GB. [2020-10-20 00:40:12,534 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.70 ms. Allocated memory is still 33.0 MB. Free memory was 10.4 MB in the beginning and 10.4 MB in the end (delta: 43.7 kB). Peak memory consumption was 43.7 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 340.14 ms. Allocated memory was 34.6 MB in the beginning and 44.0 MB in the end (delta: 9.4 MB). Free memory was 14.4 MB in the beginning and 24.6 MB in the end (delta: -10.1 MB). Peak memory consumption was 11.0 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 42.22 ms. Allocated memory is still 44.0 MB. Free memory was 24.6 MB in the beginning and 22.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 31.71 ms. Allocated memory is still 44.0 MB. Free memory was 22.5 MB in the beginning and 20.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 14.3 GB. * RCFGBuilder took 383.28 ms. Allocated memory was 44.0 MB in the beginning and 45.6 MB in the end (delta: 1.6 MB). Free memory was 20.9 MB in the beginning and 13.0 MB in the end (delta: 7.9 MB). Peak memory consumption was 9.5 MB. Max. memory is 14.3 GB. * TraceAbstraction took 1217.37 ms. Allocated memory was 45.6 MB in the beginning and 48.8 MB in the end (delta: 3.1 MB). Free memory was 12.6 MB in the beginning and 26.2 MB in the end (delta: -13.6 MB). There was no memory consumed. Max. memory is 14.3 GB. * Witness Printer took 5.13 ms. Allocated memory is still 48.8 MB. Free memory was 26.2 MB in the beginning and 25.8 MB in the end (delta: 369.4 kB). Peak memory consumption was 369.4 kB. Max. memory is 14.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 3]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 46, overapproximation of someBinaryArithmeticFLOAToperation at line 56. Possible FailurePath: [L56] float x = 0.0f / 0.0f; [L57] float y = 0.0f / 0.0f; [L14] __uint32_t w; [L17] ieee_float_shape_type gf_u; [L18] gf_u.value = (x) [L19] EXPR gf_u.word [L19] (w) = gf_u.word [L22] COND FALSE !(w == 0x00000000 || w == 0x80000000) [L24-L25] COND FALSE !((w >= 0x00800000 && w <= 0x7f7fffff) || (w >= 0x80800000 && w <= 0xff7fffff)) [L27-L28] COND FALSE !((w >= 0x00000001 && w <= 0x007fffff) || (w >= 0x80000001 && w <= 0x807fffff)) [L30] COND FALSE !(w == 0x7f800000 || w == 0xff800000) [L33] return 0; [L37] COND TRUE __fpclassify_float(x) == 0 [L38] return y; [L58] float res = fmin_float(x, y); [L46] return x != x; [L60] COND TRUE !isnan_float(res) [L3] __assert_fail("0", "float_req_bl_1230.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.0s, OverallIterations: 6, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 206 SDtfs, 44 SDslu, 238 SDs, 0 SdLazy, 84 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=29occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 44 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 74 NumberOfCodeBlocks, 74 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 55 ConstructedInterpolants, 0 QuantifiedInterpolants, 799 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.1.25-9a8b2e8 [2020-10-20 00:40:14,794 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 00:40:14,797 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 00:40:14,837 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 00:40:14,837 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 00:40:14,847 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 00:40:14,849 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 00:40:14,853 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 00:40:14,855 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 00:40:14,859 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 00:40:14,861 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 00:40:14,862 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 00:40:14,862 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 00:40:14,866 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 00:40:14,868 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 00:40:14,870 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 00:40:14,871 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 00:40:14,872 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 00:40:14,875 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 00:40:14,882 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 00:40:14,884 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 00:40:14,886 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 00:40:14,888 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 00:40:14,888 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 00:40:14,900 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 00:40:14,900 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 00:40:14,901 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 00:40:14,901 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 00:40:14,902 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 00:40:14,908 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 00:40:14,908 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 00:40:14,909 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 00:40:14,910 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 00:40:14,913 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 00:40:14,913 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 00:40:14,914 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 00:40:14,914 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 00:40:14,914 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 00:40:14,915 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 00:40:14,920 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 00:40:14,920 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 00:40:14,921 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2020-10-20 00:40:14,970 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 00:40:14,970 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 00:40:14,971 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 00:40:14,971 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 00:40:14,972 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 00:40:14,972 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 00:40:14,972 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 00:40:14,972 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 00:40:14,972 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 00:40:14,973 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-20 00:40:14,973 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 00:40:14,973 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-20 00:40:14,974 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-10-20 00:40:14,974 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-10-20 00:40:14,974 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 00:40:14,975 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-20 00:40:14,975 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 00:40:14,975 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-20 00:40:14,975 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 00:40:14,975 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 00:40:14,976 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 00:40:14,976 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 00:40:14,976 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 00:40:14,976 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 00:40:14,977 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 00:40:14,977 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-20 00:40:14,977 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2020-10-20 00:40:14,977 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-10-20 00:40:14,978 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-20 00:40:14,978 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 00:40:14,979 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-20 00:40:14,979 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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(reach_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 -> 3712292932a14caaa681695c17d35c29cbe1c2a4 [2020-10-20 00:40:15,185 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 00:40:15,198 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 00:40:15,202 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 00:40:15,204 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 00:40:15,204 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 00:40:15,205 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-newlib/float_req_bl_1230.c [2020-10-20 00:40:15,282 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a701002db/a219ee4ef48d476aa4de04925c7e9ead/FLAG430e6f5de [2020-10-20 00:40:15,858 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 00:40:15,859 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-newlib/float_req_bl_1230.c [2020-10-20 00:40:15,869 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a701002db/a219ee4ef48d476aa4de04925c7e9ead/FLAG430e6f5de [2020-10-20 00:40:16,112 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a701002db/a219ee4ef48d476aa4de04925c7e9ead [2020-10-20 00:40:16,115 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 00:40:16,122 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-20 00:40:16,123 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 00:40:16,123 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 00:40:16,127 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 00:40:16,128 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:40:16" (1/1) ... [2020-10-20 00:40:16,131 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45089688 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:16, skipping insertion in model container [2020-10-20 00:40:16,131 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:40:16" (1/1) ... [2020-10-20 00:40:16,139 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 00:40:16,157 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 00:40:16,363 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:40:16,389 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 00:40:16,414 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:40:16,435 INFO L208 MainTranslator]: Completed translation [2020-10-20 00:40:16,436 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:16 WrapperNode [2020-10-20 00:40:16,436 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 00:40:16,437 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-20 00:40:16,437 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-20 00:40:16,437 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-20 00:40:16,445 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:16" (1/1) ... [2020-10-20 00:40:16,457 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:16" (1/1) ... [2020-10-20 00:40:16,481 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-20 00:40:16,482 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 00:40:16,482 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 00:40:16,482 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 00:40:16,490 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:16" (1/1) ... [2020-10-20 00:40:16,490 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:16" (1/1) ... [2020-10-20 00:40:16,494 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:16" (1/1) ... [2020-10-20 00:40:16,494 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:16" (1/1) ... [2020-10-20 00:40:16,508 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:16" (1/1) ... [2020-10-20 00:40:16,513 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:16" (1/1) ... [2020-10-20 00:40:16,516 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:16" (1/1) ... [2020-10-20 00:40:16,520 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 00:40:16,521 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 00:40:16,521 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 00:40:16,521 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 00:40:16,522 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:16" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 00:40:16,581 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-10-20 00:40:16,582 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 00:40:16,582 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2020-10-20 00:40:16,582 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 00:40:16,583 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 00:40:16,583 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE4 [2020-10-20 00:40:16,583 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-20 00:40:16,931 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 00:40:16,932 INFO L298 CfgBuilder]: Removed 18 assume(true) statements. [2020-10-20 00:40:16,935 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:40:16 BoogieIcfgContainer [2020-10-20 00:40:16,935 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 00:40:16,936 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 00:40:16,937 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 00:40:16,941 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 00:40:16,942 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 12:40:16" (1/3) ... [2020-10-20 00:40:16,943 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cf5171d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:40:16, skipping insertion in model container [2020-10-20 00:40:16,944 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:16" (2/3) ... [2020-10-20 00:40:16,944 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cf5171d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:40:16, skipping insertion in model container [2020-10-20 00:40:16,945 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:40:16" (3/3) ... [2020-10-20 00:40:16,947 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1230.c [2020-10-20 00:40:16,962 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 00:40:16,971 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-20 00:40:16,988 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-20 00:40:17,035 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 00:40:17,035 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-20 00:40:17,036 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 00:40:17,036 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 00:40:17,039 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 00:40:17,040 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 00:40:17,040 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 00:40:17,040 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 00:40:17,070 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-10-20 00:40:17,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-20 00:40:17,077 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:40:17,078 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:40:17,079 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:40:17,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:40:17,086 INFO L82 PathProgramCache]: Analyzing trace with hash -958093107, now seen corresponding path program 1 times [2020-10-20 00:40:17,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-20 00:40:17,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1448768989] [2020-10-20 00:40:17,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-10-20 00:40:17,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:40:17,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 1 conjunts are in the unsatisfiable core [2020-10-20 00:40:17,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:40:17,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:40:17,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-20 00:40:17,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:40:17,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1448768989] [2020-10-20 00:40:17,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:40:17,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-10-20 00:40:17,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408658565] [2020-10-20 00:40:17,261 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-20 00:40:17,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-20 00:40:17,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-20 00:40:17,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-20 00:40:17,279 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 2 states. [2020-10-20 00:40:17,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:40:17,302 INFO L93 Difference]: Finished difference Result 55 states and 85 transitions. [2020-10-20 00:40:17,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-20 00:40:17,304 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-10-20 00:40:17,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:40:17,316 INFO L225 Difference]: With dead ends: 55 [2020-10-20 00:40:17,316 INFO L226 Difference]: Without dead ends: 25 [2020-10-20 00:40:17,320 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-20 00:40:17,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-20 00:40:17,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-20 00:40:17,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-20 00:40:17,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 35 transitions. [2020-10-20 00:40:17,360 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 35 transitions. Word has length 10 [2020-10-20 00:40:17,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:40:17,361 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 35 transitions. [2020-10-20 00:40:17,361 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-20 00:40:17,361 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 35 transitions. [2020-10-20 00:40:17,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-20 00:40:17,362 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:40:17,362 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:40:17,570 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-10-20 00:40:17,570 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:40:17,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:40:17,571 INFO L82 PathProgramCache]: Analyzing trace with hash 1001566992, now seen corresponding path program 1 times [2020-10-20 00:40:17,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-20 00:40:17,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1588197154] [2020-10-20 00:40:17,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-10-20 00:40:17,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:40:17,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-20 00:40:17,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:40:17,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:40:17,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-20 00:40:17,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:40:17,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1588197154] [2020-10-20 00:40:17,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:40:17,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2020-10-20 00:40:17,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033065146] [2020-10-20 00:40:17,737 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-20 00:40:17,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-20 00:40:17,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-20 00:40:17,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-20 00:40:17,738 INFO L87 Difference]: Start difference. First operand 25 states and 35 transitions. Second operand 6 states. [2020-10-20 00:40:17,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:40:17,863 INFO L93 Difference]: Finished difference Result 52 states and 65 transitions. [2020-10-20 00:40:17,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-20 00:40:17,864 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-10-20 00:40:17,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:40:17,865 INFO L225 Difference]: With dead ends: 52 [2020-10-20 00:40:17,865 INFO L226 Difference]: Without dead ends: 47 [2020-10-20 00:40:17,866 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-20 00:40:17,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-20 00:40:17,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 27. [2020-10-20 00:40:17,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-20 00:40:17,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2020-10-20 00:40:17,883 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 11 [2020-10-20 00:40:17,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:40:17,883 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2020-10-20 00:40:17,883 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-20 00:40:17,884 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2020-10-20 00:40:17,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-20 00:40:17,885 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:40:17,885 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:40:18,107 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-10-20 00:40:18,108 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:40:18,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:40:18,109 INFO L82 PathProgramCache]: Analyzing trace with hash 1219229111, now seen corresponding path program 1 times [2020-10-20 00:40:18,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-20 00:40:18,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1051129830] [2020-10-20 00:40:18,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-10-20 00:40:18,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:40:18,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-20 00:40:18,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:40:18,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:40:18,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-20 00:40:18,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:40:18,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1051129830] [2020-10-20 00:40:18,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:40:18,397 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2020-10-20 00:40:18,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268832001] [2020-10-20 00:40:18,397 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-20 00:40:18,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-20 00:40:18,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-20 00:40:18,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-20 00:40:18,399 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand 10 states. [2020-10-20 00:40:18,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:40:18,667 INFO L93 Difference]: Finished difference Result 36 states and 45 transitions. [2020-10-20 00:40:18,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-20 00:40:18,668 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-10-20 00:40:18,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:40:18,669 INFO L225 Difference]: With dead ends: 36 [2020-10-20 00:40:18,669 INFO L226 Difference]: Without dead ends: 27 [2020-10-20 00:40:18,670 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-10-20 00:40:18,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-20 00:40:18,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2020-10-20 00:40:18,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-20 00:40:18,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 33 transitions. [2020-10-20 00:40:18,675 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 33 transitions. Word has length 14 [2020-10-20 00:40:18,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:40:18,675 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 33 transitions. [2020-10-20 00:40:18,675 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-20 00:40:18,675 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 33 transitions. [2020-10-20 00:40:18,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-20 00:40:18,676 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:40:18,676 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:40:18,887 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-10-20 00:40:18,888 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:40:18,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:40:18,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1012428811, now seen corresponding path program 1 times [2020-10-20 00:40:18,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-20 00:40:18,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1100549753] [2020-10-20 00:40:18,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-10-20 00:40:18,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:40:18,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-20 00:40:18,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:40:18,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:40:18,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-20 00:40:19,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:40:19,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1100549753] [2020-10-20 00:40:19,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:40:19,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2020-10-20 00:40:19,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979153709] [2020-10-20 00:40:19,023 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-20 00:40:19,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-20 00:40:19,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-20 00:40:19,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-20 00:40:19,024 INFO L87 Difference]: Start difference. First operand 25 states and 33 transitions. Second operand 6 states. [2020-10-20 00:40:19,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:40:19,118 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2020-10-20 00:40:19,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-20 00:40:19,118 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-10-20 00:40:19,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:40:19,119 INFO L225 Difference]: With dead ends: 52 [2020-10-20 00:40:19,119 INFO L226 Difference]: Without dead ends: 47 [2020-10-20 00:40:19,120 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-20 00:40:19,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-20 00:40:19,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 27. [2020-10-20 00:40:19,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-20 00:40:19,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 35 transitions. [2020-10-20 00:40:19,126 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 35 transitions. Word has length 16 [2020-10-20 00:40:19,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:40:19,127 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 35 transitions. [2020-10-20 00:40:19,127 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-20 00:40:19,127 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 35 transitions. [2020-10-20 00:40:19,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-20 00:40:19,128 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:40:19,128 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:40:19,344 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2020-10-20 00:40:19,345 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:40:19,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:40:19,345 INFO L82 PathProgramCache]: Analyzing trace with hash -356841937, now seen corresponding path program 1 times [2020-10-20 00:40:19,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-20 00:40:19,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1777328422] [2020-10-20 00:40:19,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-10-20 00:40:19,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:40:19,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-20 00:40:19,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:40:19,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:40:19,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-20 00:40:19,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:40:19,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1777328422] [2020-10-20 00:40:19,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:40:19,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2020-10-20 00:40:19,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308739257] [2020-10-20 00:40:19,698 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-20 00:40:19,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-20 00:40:19,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-20 00:40:19,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-20 00:40:19,699 INFO L87 Difference]: Start difference. First operand 27 states and 35 transitions. Second operand 12 states. [2020-10-20 00:40:20,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:40:20,035 INFO L93 Difference]: Finished difference Result 32 states and 39 transitions. [2020-10-20 00:40:20,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-20 00:40:20,036 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 18 [2020-10-20 00:40:20,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:40:20,037 INFO L225 Difference]: With dead ends: 32 [2020-10-20 00:40:20,037 INFO L226 Difference]: Without dead ends: 23 [2020-10-20 00:40:20,037 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2020-10-20 00:40:20,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-20 00:40:20,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-20 00:40:20,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-20 00:40:20,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-10-20 00:40:20,043 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 18 [2020-10-20 00:40:20,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:40:20,043 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-10-20 00:40:20,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-20 00:40:20,044 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-10-20 00:40:20,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-20 00:40:20,045 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:40:20,045 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:40:20,255 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2020-10-20 00:40:20,256 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:40:20,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:40:20,256 INFO L82 PathProgramCache]: Analyzing trace with hash -208376157, now seen corresponding path program 1 times [2020-10-20 00:40:20,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-20 00:40:20,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1184279217] [2020-10-20 00:40:20,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-10-20 00:40:20,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:40:20,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-20 00:40:20,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:40:20,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:40:20,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-20 00:40:20,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:40:20,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1184279217] [2020-10-20 00:40:20,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:40:20,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2020-10-20 00:40:20,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525240364] [2020-10-20 00:40:20,483 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-20 00:40:20,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-20 00:40:20,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-20 00:40:20,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-20 00:40:20,484 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 10 states. [2020-10-20 00:40:20,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:40:20,703 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2020-10-20 00:40:20,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-20 00:40:20,703 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 19 [2020-10-20 00:40:20,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:40:20,703 INFO L225 Difference]: With dead ends: 23 [2020-10-20 00:40:20,703 INFO L226 Difference]: Without dead ends: 0 [2020-10-20 00:40:20,704 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-10-20 00:40:20,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-20 00:40:20,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-20 00:40:20,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-20 00:40:20,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-20 00:40:20,705 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2020-10-20 00:40:20,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:40:20,705 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-20 00:40:20,705 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-20 00:40:20,705 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-20 00:40:20,706 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-20 00:40:20,910 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 mathsat -unsat_core_generation=3 [2020-10-20 00:40:20,914 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-20 00:40:21,063 INFO L274 CegarLoopResult]: For program point L60(lines 60 63) no Hoare annotation was computed. [2020-10-20 00:40:21,063 INFO L274 CegarLoopResult]: For program point L27(lines 27 33) no Hoare annotation was computed. [2020-10-20 00:40:21,063 INFO L274 CegarLoopResult]: For program point L27-1(lines 27 33) no Hoare annotation was computed. [2020-10-20 00:40:21,064 INFO L274 CegarLoopResult]: For program point L3(line 3) no Hoare annotation was computed. [2020-10-20 00:40:21,064 INFO L274 CegarLoopResult]: For program point L3-1(line 3) no Hoare annotation was computed. [2020-10-20 00:40:21,064 INFO L277 CegarLoopResult]: At program point L65(lines 48 66) the Hoare annotation is: true [2020-10-20 00:40:21,064 INFO L274 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-10-20 00:40:21,064 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-10-20 00:40:21,064 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-20 00:40:21,064 INFO L274 CegarLoopResult]: For program point L24(lines 24 33) no Hoare annotation was computed. [2020-10-20 00:40:21,065 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-10-20 00:40:21,065 INFO L274 CegarLoopResult]: For program point L24-1(lines 24 33) no Hoare annotation was computed. [2020-10-20 00:40:21,065 INFO L274 CegarLoopResult]: For program point L16-1(lines 16 20) no Hoare annotation was computed. [2020-10-20 00:40:21,066 INFO L270 CegarLoopResult]: At program point L16-2(lines 16 20) the Hoare annotation is: (and (not (fp.eq ULTIMATE.start_fmin_float_~y ULTIMATE.start_fmin_float_~y)) (not (fp.eq ULTIMATE.start_fmin_float_~x ULTIMATE.start_fmin_float_~x))) [2020-10-20 00:40:21,066 INFO L274 CegarLoopResult]: For program point L16-3(lines 13 34) no Hoare annotation was computed. [2020-10-20 00:40:21,066 INFO L274 CegarLoopResult]: For program point L16-5(lines 16 20) no Hoare annotation was computed. [2020-10-20 00:40:21,066 INFO L270 CegarLoopResult]: At program point L16-6(lines 16 20) the Hoare annotation is: (and (not (fp.eq ULTIMATE.start_fmin_float_~y ULTIMATE.start_fmin_float_~y)) (not (fp.eq ULTIMATE.start_fmin_float_~x ULTIMATE.start_fmin_float_~x))) [2020-10-20 00:40:21,066 INFO L274 CegarLoopResult]: For program point L16-7(lines 13 34) no Hoare annotation was computed. [2020-10-20 00:40:21,066 INFO L274 CegarLoopResult]: For program point L37(lines 37 38) no Hoare annotation was computed. [2020-10-20 00:40:21,066 INFO L270 CegarLoopResult]: At program point L33(lines 13 34) the Hoare annotation is: (and (not (fp.eq ULTIMATE.start_fmin_float_~y ULTIMATE.start_fmin_float_~y)) (not (fp.eq ULTIMATE.start_fmin_float_~x ULTIMATE.start_fmin_float_~x))) [2020-10-20 00:40:21,067 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-20 00:40:21,067 INFO L270 CegarLoopResult]: At program point L33-1(lines 13 34) the Hoare annotation is: (let ((.cse0 (not (fp.eq ULTIMATE.start_fmin_float_~y ULTIMATE.start_fmin_float_~y)))) (or (and .cse0 (not (fp.eq ULTIMATE.start_fmin_float_~x ULTIMATE.start_fmin_float_~x))) (and (not (= (_ bv0 32) |ULTIMATE.start___fpclassify_float_#res|)) .cse0))) [2020-10-20 00:40:21,067 INFO L270 CegarLoopResult]: At program point L46(line 46) the Hoare annotation is: (and (= (_ bv1 32) |ULTIMATE.start_isnan_float_#res|) (not (fp.eq |ULTIMATE.start_fmin_float_#res| |ULTIMATE.start_fmin_float_#res|)) (not (fp.eq ULTIMATE.start_fmin_float_~y ULTIMATE.start_fmin_float_~y))) [2020-10-20 00:40:21,068 INFO L274 CegarLoopResult]: For program point L42(line 42) no Hoare annotation was computed. [2020-10-20 00:40:21,068 INFO L274 CegarLoopResult]: For program point L42-2(line 42) no Hoare annotation was computed. [2020-10-20 00:40:21,068 INFO L270 CegarLoopResult]: At program point L42-3(lines 36 43) the Hoare annotation is: (and (not (fp.eq |ULTIMATE.start_fmin_float_#res| |ULTIMATE.start_fmin_float_#res|)) (not (fp.eq ULTIMATE.start_fmin_float_~y ULTIMATE.start_fmin_float_~y))) [2020-10-20 00:40:21,068 INFO L274 CegarLoopResult]: For program point L30(lines 30 33) no Hoare annotation was computed. [2020-10-20 00:40:21,068 INFO L274 CegarLoopResult]: For program point L30-1(lines 30 33) no Hoare annotation was computed. [2020-10-20 00:40:21,069 INFO L274 CegarLoopResult]: For program point L39(lines 39 40) no Hoare annotation was computed. [2020-10-20 00:40:21,088 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 12:40:21 BoogieIcfgContainer [2020-10-20 00:40:21,088 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-20 00:40:21,089 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 00:40:21,089 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 00:40:21,089 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 00:40:21,090 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:40:16" (3/4) ... [2020-10-20 00:40:21,093 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-10-20 00:40:21,106 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2020-10-20 00:40:21,107 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2020-10-20 00:40:21,107 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-10-20 00:40:21,108 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-20 00:40:21,139 WARN L221 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: !~fp.eq~FLOAT(\result, \result) && !~fp.eq~FLOAT(y, y) [2020-10-20 00:40:21,139 WARN L221 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (1bv32 == \result && !~fp.eq~FLOAT(\result, \result)) && !~fp.eq~FLOAT(y, y) [2020-10-20 00:40:21,140 WARN L221 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (!~fp.eq~FLOAT(y, y) && !~fp.eq~FLOAT(x, x)) || (!(0bv32 == \result) && !~fp.eq~FLOAT(y, y)) [2020-10-20 00:40:21,176 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-20 00:40:21,176 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 00:40:21,179 INFO L168 Benchmark]: Toolchain (without parser) took 5061.74 ms. Allocated memory was 41.9 MB in the beginning and 50.9 MB in the end (delta: 8.9 MB). Free memory was 22.8 MB in the beginning and 14.3 MB in the end (delta: 8.5 MB). Peak memory consumption was 17.4 MB. Max. memory is 14.3 GB. [2020-10-20 00:40:21,180 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 32.0 MB. Free memory was 10.8 MB in the beginning and 10.8 MB in the end (delta: 47.5 kB). Peak memory consumption was 47.5 kB. Max. memory is 14.3 GB. [2020-10-20 00:40:21,180 INFO L168 Benchmark]: CACSL2BoogieTranslator took 313.44 ms. Allocated memory was 41.9 MB in the beginning and 42.5 MB in the end (delta: 524.3 kB). Free memory was 21.9 MB in the beginning and 22.4 MB in the end (delta: -529.5 kB). Peak memory consumption was 13.0 MB. Max. memory is 14.3 GB. [2020-10-20 00:40:21,181 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.80 ms. Allocated memory is still 42.5 MB. Free memory was 22.4 MB in the beginning and 20.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 14.3 GB. [2020-10-20 00:40:21,182 INFO L168 Benchmark]: Boogie Preprocessor took 38.28 ms. Allocated memory is still 42.5 MB. Free memory was 20.4 MB in the beginning and 18.6 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 14.3 GB. [2020-10-20 00:40:21,182 INFO L168 Benchmark]: RCFGBuilder took 414.71 ms. Allocated memory was 42.5 MB in the beginning and 44.6 MB in the end (delta: 2.1 MB). Free memory was 18.6 MB in the beginning and 16.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 9.6 MB. Max. memory is 14.3 GB. [2020-10-20 00:40:21,183 INFO L168 Benchmark]: TraceAbstraction took 4151.98 ms. Allocated memory was 44.6 MB in the beginning and 50.9 MB in the end (delta: 6.3 MB). Free memory was 16.1 MB in the beginning and 19.2 MB in the end (delta: -3.1 MB). Peak memory consumption was 3.2 MB. Max. memory is 14.3 GB. [2020-10-20 00:40:21,184 INFO L168 Benchmark]: Witness Printer took 88.08 ms. Allocated memory is still 50.9 MB. Free memory was 18.7 MB in the beginning and 14.3 MB in the end (delta: 4.4 MB). Peak memory consumption was 4.4 MB. Max. memory is 14.3 GB. [2020-10-20 00:40:21,187 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 32.0 MB. Free memory was 10.8 MB in the beginning and 10.8 MB in the end (delta: 47.5 kB). Peak memory consumption was 47.5 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 313.44 ms. Allocated memory was 41.9 MB in the beginning and 42.5 MB in the end (delta: 524.3 kB). Free memory was 21.9 MB in the beginning and 22.4 MB in the end (delta: -529.5 kB). Peak memory consumption was 13.0 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 44.80 ms. Allocated memory is still 42.5 MB. Free memory was 22.4 MB in the beginning and 20.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 38.28 ms. Allocated memory is still 42.5 MB. Free memory was 20.4 MB in the beginning and 18.6 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 14.3 GB. * RCFGBuilder took 414.71 ms. Allocated memory was 42.5 MB in the beginning and 44.6 MB in the end (delta: 2.1 MB). Free memory was 18.6 MB in the beginning and 16.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 9.6 MB. Max. memory is 14.3 GB. * TraceAbstraction took 4151.98 ms. Allocated memory was 44.6 MB in the beginning and 50.9 MB in the end (delta: 6.3 MB). Free memory was 16.1 MB in the beginning and 19.2 MB in the end (delta: -3.1 MB). Peak memory consumption was 3.2 MB. Max. memory is 14.3 GB. * Witness Printer took 88.08 ms. Allocated memory is still 50.9 MB. Free memory was 18.7 MB in the beginning and 14.3 MB in the end (delta: 4.4 MB). Peak memory consumption was 4.4 MB. Max. memory is 14.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 16]: Loop Invariant Derived loop invariant: !~fp.eq~FLOAT(y, y) && !~fp.eq~FLOAT(x, x) - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: (!~fp.eq~FLOAT(y, y) && !~fp.eq~FLOAT(x, x)) || (!(0bv32 == \result) && !~fp.eq~FLOAT(y, y)) - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: !~fp.eq~FLOAT(y, y) && !~fp.eq~FLOAT(x, x) - InvariantResult [Line: 48]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 36]: Loop Invariant Derived loop invariant: !~fp.eq~FLOAT(\result, \result) && !~fp.eq~FLOAT(y, y) - InvariantResult [Line: 46]: Loop Invariant Derived loop invariant: (1bv32 == \result && !~fp.eq~FLOAT(\result, \result)) && !~fp.eq~FLOAT(y, y) - InvariantResult [Line: 16]: Loop Invariant Derived loop invariant: !~fp.eq~FLOAT(y, y) && !~fp.eq~FLOAT(x, x) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.8s, OverallIterations: 6, TraceHistogramMax: 1, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 182 SDtfs, 117 SDslu, 549 SDs, 0 SdLazy, 138 SolverSat, 19 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 181 GetRequests, 130 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 7 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=29occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 42 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 19 NumberOfFragments, 68 HoareAnnotationTreeSize, 7 FomulaSimplifications, 213 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 4 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 88 NumberOfCodeBlocks, 88 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 164 ConstructedInterpolants, 36 QuantifiedInterpolants, 8466 SizeOfPredicates, 32 NumberOfNonLiveVariables, 375 ConjunctsInSsa, 38 ConjunctsInUnsatCore, 12 InterpolantComputations, 12 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...