./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/float-newlib/float_req_bl_1252b.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30f4e4ab Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/float-newlib/float_req_bl_1252b.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c8e4dbe5a9ab518912f1108432d43f490ec977d7 .......................................................................................................................................................................................................................................................................................................................................................... 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 -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/float-newlib/float_req_bl_1252b.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c8e4dbe5a9ab518912f1108432d43f490ec977d7 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.24-30f4e4a [2019-11-27 23:51:16,164 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-27 23:51:16,166 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-27 23:51:16,185 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-27 23:51:16,185 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-27 23:51:16,188 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-27 23:51:16,192 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-27 23:51:16,198 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-27 23:51:16,201 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-27 23:51:16,206 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-27 23:51:16,208 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-27 23:51:16,210 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-27 23:51:16,211 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-27 23:51:16,215 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-27 23:51:16,217 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-27 23:51:16,219 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-27 23:51:16,221 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-27 23:51:16,226 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-27 23:51:16,228 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-27 23:51:16,230 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-27 23:51:16,232 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-27 23:51:16,233 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-27 23:51:16,234 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-27 23:51:16,235 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-27 23:51:16,237 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-27 23:51:16,237 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-27 23:51:16,238 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-27 23:51:16,239 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-27 23:51:16,239 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-27 23:51:16,240 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-27 23:51:16,240 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-27 23:51:16,241 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-27 23:51:16,242 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-27 23:51:16,243 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-27 23:51:16,244 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-27 23:51:16,244 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-27 23:51:16,245 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-27 23:51:16,245 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-27 23:51:16,245 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-27 23:51:16,246 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-27 23:51:16,247 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-27 23:51:16,248 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-27 23:51:16,263 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-27 23:51:16,263 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-27 23:51:16,265 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-27 23:51:16,265 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-27 23:51:16,265 INFO L138 SettingsManager]: * Use SBE=true [2019-11-27 23:51:16,265 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-27 23:51:16,266 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-27 23:51:16,266 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-27 23:51:16,266 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-27 23:51:16,266 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-27 23:51:16,267 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-27 23:51:16,267 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-27 23:51:16,267 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-27 23:51:16,267 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-27 23:51:16,268 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-27 23:51:16,268 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-27 23:51:16,268 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-27 23:51:16,268 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-27 23:51:16,269 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-27 23:51:16,269 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-27 23:51:16,269 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-27 23:51:16,269 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-27 23:51:16,270 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-27 23:51:16,270 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-27 23:51:16,270 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-27 23:51:16,270 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-27 23:51:16,270 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-27 23:51:16,271 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-27 23:51:16,271 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(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c8e4dbe5a9ab518912f1108432d43f490ec977d7 [2019-11-27 23:51:16,568 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-27 23:51:16,581 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-27 23:51:16,585 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-27 23:51:16,586 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-27 23:51:16,587 INFO L275 PluginConnector]: CDTParser initialized [2019-11-27 23:51:16,587 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-newlib/float_req_bl_1252b.c [2019-11-27 23:51:16,649 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/693dce1f4/aa6365a8f98b4cbeb9f06fa9f174a088/FLAGdfd8b8718 [2019-11-27 23:51:17,110 INFO L306 CDTParser]: Found 1 translation units. [2019-11-27 23:51:17,111 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-newlib/float_req_bl_1252b.c [2019-11-27 23:51:17,121 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/693dce1f4/aa6365a8f98b4cbeb9f06fa9f174a088/FLAGdfd8b8718 [2019-11-27 23:51:17,462 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/693dce1f4/aa6365a8f98b4cbeb9f06fa9f174a088 [2019-11-27 23:51:17,465 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-27 23:51:17,466 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-27 23:51:17,468 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-27 23:51:17,468 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-27 23:51:17,472 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-27 23:51:17,473 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 11:51:17" (1/1) ... [2019-11-27 23:51:17,476 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33519a14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:51:17, skipping insertion in model container [2019-11-27 23:51:17,476 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 11:51:17" (1/1) ... [2019-11-27 23:51:17,485 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-27 23:51:17,505 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-27 23:51:17,717 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-27 23:51:17,722 INFO L203 MainTranslator]: Completed pre-run [2019-11-27 23:51:17,752 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-27 23:51:17,841 INFO L208 MainTranslator]: Completed translation [2019-11-27 23:51:17,842 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:51:17 WrapperNode [2019-11-27 23:51:17,842 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-27 23:51:17,843 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-27 23:51:17,844 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-27 23:51:17,844 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-27 23:51:17,853 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:51:17" (1/1) ... [2019-11-27 23:51:17,863 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:51:17" (1/1) ... [2019-11-27 23:51:17,889 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-27 23:51:17,890 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-27 23:51:17,890 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-27 23:51:17,890 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-27 23:51:17,897 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:51:17" (1/1) ... [2019-11-27 23:51:17,897 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:51:17" (1/1) ... [2019-11-27 23:51:17,900 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:51:17" (1/1) ... [2019-11-27 23:51:17,900 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:51:17" (1/1) ... [2019-11-27 23:51:17,912 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:51:17" (1/1) ... [2019-11-27 23:51:17,918 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:51:17" (1/1) ... [2019-11-27 23:51:17,920 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:51:17" (1/1) ... [2019-11-27 23:51:17,922 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-27 23:51:17,923 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-27 23:51:17,923 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-27 23:51:17,923 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-27 23:51:17,925 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:51:17" (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 [2019-11-27 23:51:17,974 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-27 23:51:17,974 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2019-11-27 23:51:17,975 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-27 23:51:17,975 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-27 23:51:17,975 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-27 23:51:17,976 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-27 23:51:18,399 INFO L292 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-27 23:51:18,401 INFO L297 CfgBuilder]: Removed 18 assume(true) statements. [2019-11-27 23:51:18,402 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 11:51:18 BoogieIcfgContainer [2019-11-27 23:51:18,402 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-27 23:51:18,406 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-27 23:51:18,406 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-27 23:51:18,410 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-27 23:51:18,410 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.11 11:51:17" (1/3) ... [2019-11-27 23:51:18,411 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c2a9d75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 11:51:18, skipping insertion in model container [2019-11-27 23:51:18,411 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:51:17" (2/3) ... [2019-11-27 23:51:18,413 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c2a9d75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 11:51:18, skipping insertion in model container [2019-11-27 23:51:18,414 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 11:51:18" (3/3) ... [2019-11-27 23:51:18,416 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_1252b.c [2019-11-27 23:51:18,425 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-27 23:51:18,433 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-27 23:51:18,444 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-27 23:51:18,466 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-27 23:51:18,466 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-27 23:51:18,466 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-27 23:51:18,466 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-27 23:51:18,466 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-27 23:51:18,466 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-27 23:51:18,467 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-27 23:51:18,467 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-27 23:51:18,482 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2019-11-27 23:51:18,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-27 23:51:18,489 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 23:51:18,490 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 23:51:18,490 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 23:51:18,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 23:51:18,497 INFO L82 PathProgramCache]: Analyzing trace with hash -958075201, now seen corresponding path program 1 times [2019-11-27 23:51:18,507 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 23:51:18,507 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555468010] [2019-11-27 23:51:18,508 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 23:51:18,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 23:51:18,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 23:51:18,621 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555468010] [2019-11-27 23:51:18,622 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-27 23:51:18,622 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-27 23:51:18,623 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409133507] [2019-11-27 23:51:18,628 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-27 23:51:18,629 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 23:51:18,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-27 23:51:18,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-27 23:51:18,647 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 2 states. [2019-11-27 23:51:18,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 23:51:18,671 INFO L93 Difference]: Finished difference Result 62 states and 98 transitions. [2019-11-27 23:51:18,671 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-27 23:51:18,673 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-11-27 23:51:18,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 23:51:18,686 INFO L225 Difference]: With dead ends: 62 [2019-11-27 23:51:18,687 INFO L226 Difference]: Without dead ends: 29 [2019-11-27 23:51:18,690 INFO L630 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 [2019-11-27 23:51:18,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-27 23:51:18,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-11-27 23:51:18,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-27 23:51:18,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2019-11-27 23:51:18,735 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 10 [2019-11-27 23:51:18,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 23:51:18,736 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2019-11-27 23:51:18,736 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-27 23:51:18,736 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2019-11-27 23:51:18,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-27 23:51:18,737 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 23:51:18,737 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 23:51:18,738 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 23:51:18,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 23:51:18,738 INFO L82 PathProgramCache]: Analyzing trace with hash 1001584898, now seen corresponding path program 1 times [2019-11-27 23:51:18,738 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 23:51:18,739 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318220408] [2019-11-27 23:51:18,739 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 23:51:18,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 23:51:18,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 23:51:18,818 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318220408] [2019-11-27 23:51:18,818 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-27 23:51:18,818 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-27 23:51:18,819 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069168208] [2019-11-27 23:51:18,820 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-27 23:51:18,821 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 23:51:18,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-27 23:51:18,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-27 23:51:18,822 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand 4 states. [2019-11-27 23:51:18,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 23:51:18,919 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2019-11-27 23:51:18,920 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-27 23:51:18,920 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2019-11-27 23:51:18,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 23:51:18,921 INFO L225 Difference]: With dead ends: 53 [2019-11-27 23:51:18,921 INFO L226 Difference]: Without dead ends: 44 [2019-11-27 23:51:18,922 INFO L630 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 [2019-11-27 23:51:18,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-11-27 23:51:18,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 31. [2019-11-27 23:51:18,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-11-27 23:51:18,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2019-11-27 23:51:18,936 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 11 [2019-11-27 23:51:18,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 23:51:18,937 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2019-11-27 23:51:18,937 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-27 23:51:18,938 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2019-11-27 23:51:18,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-27 23:51:18,939 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 23:51:18,940 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 23:51:18,940 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 23:51:18,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 23:51:18,941 INFO L82 PathProgramCache]: Analyzing trace with hash -555760345, now seen corresponding path program 1 times [2019-11-27 23:51:18,941 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 23:51:18,942 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638497698] [2019-11-27 23:51:18,942 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 23:51:18,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 23:51:19,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 23:51:19,037 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638497698] [2019-11-27 23:51:19,038 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-27 23:51:19,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-27 23:51:19,038 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148950346] [2019-11-27 23:51:19,038 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-27 23:51:19,039 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 23:51:19,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-27 23:51:19,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-27 23:51:19,039 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 4 states. [2019-11-27 23:51:19,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 23:51:19,102 INFO L93 Difference]: Finished difference Result 55 states and 69 transitions. [2019-11-27 23:51:19,102 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-27 23:51:19,103 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2019-11-27 23:51:19,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 23:51:19,104 INFO L225 Difference]: With dead ends: 55 [2019-11-27 23:51:19,104 INFO L226 Difference]: Without dead ends: 46 [2019-11-27 23:51:19,105 INFO L630 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 [2019-11-27 23:51:19,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-11-27 23:51:19,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 31. [2019-11-27 23:51:19,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-11-27 23:51:19,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2019-11-27 23:51:19,111 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 14 [2019-11-27 23:51:19,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 23:51:19,111 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2019-11-27 23:51:19,111 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-27 23:51:19,112 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2019-11-27 23:51:19,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-27 23:51:19,112 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 23:51:19,113 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 23:51:19,113 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 23:51:19,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 23:51:19,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1219247017, now seen corresponding path program 1 times [2019-11-27 23:51:19,114 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 23:51:19,114 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691760488] [2019-11-27 23:51:19,114 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 23:51:19,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-27 23:51:19,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-27 23:51:19,198 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-27 23:51:19,198 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-27 23:51:19,231 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.11 11:51:19 BoogieIcfgContainer [2019-11-27 23:51:19,231 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-27 23:51:19,231 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-27 23:51:19,231 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-27 23:51:19,232 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-27 23:51:19,232 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 11:51:18" (3/4) ... [2019-11-27 23:51:19,235 INFO L140 WitnessPrinter]: No result that supports witness generation found [2019-11-27 23:51:19,235 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-27 23:51:19,238 INFO L168 Benchmark]: Toolchain (without parser) took 1770.94 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 143.7 MB). Free memory was 961.7 MB in the beginning and 1.1 GB in the end (delta: -98.4 MB). Peak memory consumption was 45.3 MB. Max. memory is 11.5 GB. [2019-11-27 23:51:19,239 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 1.0 GB. Free memory is still 987.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-27 23:51:19,240 INFO L168 Benchmark]: CACSL2BoogieTranslator took 375.33 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 143.7 MB). Free memory was 961.7 MB in the beginning and 1.1 GB in the end (delta: -178.5 MB). Peak memory consumption was 20.5 MB. Max. memory is 11.5 GB. [2019-11-27 23:51:19,241 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.93 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 11.5 GB. [2019-11-27 23:51:19,241 INFO L168 Benchmark]: Boogie Preprocessor took 33.15 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-27 23:51:19,242 INFO L168 Benchmark]: RCFGBuilder took 481.46 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 26.9 MB). Peak memory consumption was 26.9 MB. Max. memory is 11.5 GB. [2019-11-27 23:51:19,243 INFO L168 Benchmark]: TraceAbstraction took 825.51 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 46.5 MB). Peak memory consumption was 46.5 MB. Max. memory is 11.5 GB. [2019-11-27 23:51:19,243 INFO L168 Benchmark]: Witness Printer took 4.02 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-27 23:51:19,248 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 1.0 GB. Free memory is still 987.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 375.33 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 143.7 MB). Free memory was 961.7 MB in the beginning and 1.1 GB in the end (delta: -178.5 MB). Peak memory consumption was 20.5 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 45.93 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 33.15 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 481.46 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 26.9 MB). Peak memory consumption was 26.9 MB. Max. memory is 11.5 GB. * TraceAbstraction took 825.51 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 46.5 MB). Peak memory consumption was 46.5 MB. Max. memory is 11.5 GB. * Witness Printer took 4.02 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 79]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 78, overapproximation of someUnaryFLOAToperation at line 74. Possible FailurePath: [L73] float x = 0.0f; [L74] float y = -0.0f; [L21] __uint32_t w; [L24] ieee_float_shape_type gf_u; [L25] gf_u.value = (x) [L26] EXPR gf_u.word [L26] (w) = gf_u.word [L29] COND FALSE !(w == 0x00000000 || w == 0x80000000) [L31-L32] COND FALSE !((w >= 0x00800000 && w <= 0x7f7fffff) || (w >= 0x80800000 && w <= 0xff7fffff)) [L34-L35] COND FALSE !((w >= 0x00000001 && w <= 0x007fffff) || (w >= 0x80000001 && w <= 0x807fffff)) [L37] COND FALSE !(w == 0x7f800000 || w == 0xff800000) [L40] return 0; [L44] COND TRUE __fpclassify_float(x) == 0 [L45] return y; [L75] float res = fmax_float(x, y); [L78] EXPR res == 0.0f && __signbit_float(res) == 0 [L78] COND TRUE !(res == 0.0f && __signbit_float(res) == 0) [L79] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 32 locations, 1 error locations. Result: UNSAFE, OverallTime: 0.7s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 135 SDtfs, 32 SDslu, 140 SDs, 0 SdLazy, 30 SolverSat, 12 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred 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, 3 MinimizatonAttempts, 28 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 49 NumberOfCodeBlocks, 49 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 32 ConstructedInterpolants, 0 QuantifiedInterpolants, 442 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: 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 0.1.24-30f4e4a [2019-11-27 23:51:21,198 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2019-11-27 23:51:21,256 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-27 23:51:21,257 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-27 23:51:21,258 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-27 23:51:21,260 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-27 23:51:21,261 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-27 23:51:21,261 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-27 23:51:21,264 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-27 23:51:21,265 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-27 23:51:21,265 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-27 23:51:21,268 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-27 23:51:21,269 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-27 23:51:21,270 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2019-11-27 23:51:21,295 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-27 23:51:21,295 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-27 23:51:21,297 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-27 23:51:21,297 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-27 23:51:21,297 INFO L138 SettingsManager]: * Use SBE=true [2019-11-27 23:51:21,298 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-27 23:51:21,298 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-27 23:51:21,298 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-27 23:51:21,298 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-27 23:51:21,298 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-27 23:51:21,299 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-27 23:51:21,300 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-27 23:51:21,300 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-27 23:51:21,300 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-27 23:51:21,301 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-27 23:51:21,301 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-27 23:51:21,301 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-27 23:51:21,301 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-27 23:51:21,302 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-27 23:51:21,302 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-27 23:51:21,302 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-27 23:51:21,302 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-27 23:51:21,303 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-27 23:51:21,303 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-27 23:51:21,303 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-27 23:51:21,303 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-27 23:51:21,303 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2019-11-27 23:51:21,304 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-27 23:51:21,304 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-27 23:51:21,304 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-27 23:51:21,304 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(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c8e4dbe5a9ab518912f1108432d43f490ec977d7 [2019-11-27 23:51:21,621 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-27 23:51:21,634 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-27 23:51:21,638 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-27 23:51:21,639 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-27 23:51:21,639 INFO L275 PluginConnector]: CDTParser initialized [2019-11-27 23:51:21,640 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-newlib/float_req_bl_1252b.c [2019-11-27 23:51:21,702 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/241c71699/26f92fbcd84545e8b9e146a9e6fd71d9/FLAGc0053da15 [2019-11-27 23:51:22,210 INFO L306 CDTParser]: Found 1 translation units. [2019-11-27 23:51:22,210 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-newlib/float_req_bl_1252b.c [2019-11-27 23:51:22,218 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/241c71699/26f92fbcd84545e8b9e146a9e6fd71d9/FLAGc0053da15 [2019-11-27 23:51:22,580 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/241c71699/26f92fbcd84545e8b9e146a9e6fd71d9 [2019-11-27 23:51:22,583 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-27 23:51:22,585 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-27 23:51:22,585 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-27 23:51:22,586 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-27 23:51:22,589 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-27 23:51:22,590 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 11:51:22" (1/1) ... [2019-11-27 23:51:22,594 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28674ab1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:51:22, skipping insertion in model container [2019-11-27 23:51:22,594 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 11:51:22" (1/1) ... [2019-11-27 23:51:22,603 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-27 23:51:22,628 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-27 23:51:22,844 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-27 23:51:22,851 INFO L203 MainTranslator]: Completed pre-run [2019-11-27 23:51:22,894 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-27 23:51:22,980 INFO L208 MainTranslator]: Completed translation [2019-11-27 23:51:22,980 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:51:22 WrapperNode [2019-11-27 23:51:22,980 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-27 23:51:22,981 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-27 23:51:22,981 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-27 23:51:22,981 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-27 23:51:22,990 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:51:22" (1/1) ... [2019-11-27 23:51:23,000 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:51:22" (1/1) ... [2019-11-27 23:51:23,028 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-27 23:51:23,029 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-27 23:51:23,029 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-27 23:51:23,029 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-27 23:51:23,038 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:51:22" (1/1) ... [2019-11-27 23:51:23,038 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:51:22" (1/1) ... [2019-11-27 23:51:23,043 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:51:22" (1/1) ... [2019-11-27 23:51:23,043 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:51:22" (1/1) ... [2019-11-27 23:51:23,054 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:51:22" (1/1) ... [2019-11-27 23:51:23,060 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:51:22" (1/1) ... [2019-11-27 23:51:23,062 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:51:22" (1/1) ... [2019-11-27 23:51:23,066 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-27 23:51:23,066 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-27 23:51:23,066 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-27 23:51:23,067 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-27 23:51:23,067 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:51:22" (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 [2019-11-27 23:51:23,124 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-27 23:51:23,124 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2019-11-27 23:51:23,124 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-27 23:51:23,124 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-27 23:51:23,124 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE4 [2019-11-27 23:51:23,125 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-27 23:51:23,528 INFO L292 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-27 23:51:23,528 INFO L297 CfgBuilder]: Removed 18 assume(true) statements. [2019-11-27 23:51:23,529 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 11:51:23 BoogieIcfgContainer [2019-11-27 23:51:23,530 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-27 23:51:23,531 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-27 23:51:23,531 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-27 23:51:23,534 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-27 23:51:23,534 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.11 11:51:22" (1/3) ... [2019-11-27 23:51:23,535 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e89fae2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 11:51:23, skipping insertion in model container [2019-11-27 23:51:23,535 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:51:22" (2/3) ... [2019-11-27 23:51:23,536 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e89fae2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 11:51:23, skipping insertion in model container [2019-11-27 23:51:23,536 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 11:51:23" (3/3) ... [2019-11-27 23:51:23,538 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_1252b.c [2019-11-27 23:51:23,548 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-27 23:51:23,555 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-27 23:51:23,564 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-27 23:51:23,584 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-27 23:51:23,585 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-27 23:51:23,585 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-27 23:51:23,585 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-27 23:51:23,585 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-27 23:51:23,585 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-27 23:51:23,585 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-27 23:51:23,585 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-27 23:51:23,598 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2019-11-27 23:51:23,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-27 23:51:23,604 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 23:51:23,606 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 23:51:23,606 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 23:51:23,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 23:51:23,612 INFO L82 PathProgramCache]: Analyzing trace with hash -958075201, now seen corresponding path program 1 times [2019-11-27 23:51:23,623 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-27 23:51:23,623 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [484234006] [2019-11-27 23:51:23,623 INFO L94 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 [2019-11-27 23:51:23,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 23:51:23,709 INFO L255 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 1 conjunts are in the unsatisfiable core [2019-11-27 23:51:23,714 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-27 23:51:23,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 23:51:23,730 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-27 23:51:23,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 23:51:23,736 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [484234006] [2019-11-27 23:51:23,737 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-27 23:51:23,737 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-11-27 23:51:23,738 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444518216] [2019-11-27 23:51:23,744 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-27 23:51:23,744 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-27 23:51:23,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-27 23:51:23,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-27 23:51:23,760 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 2 states. [2019-11-27 23:51:23,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 23:51:23,781 INFO L93 Difference]: Finished difference Result 62 states and 98 transitions. [2019-11-27 23:51:23,782 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-27 23:51:23,783 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-11-27 23:51:23,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 23:51:23,798 INFO L225 Difference]: With dead ends: 62 [2019-11-27 23:51:23,798 INFO L226 Difference]: Without dead ends: 29 [2019-11-27 23:51:23,803 INFO L630 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 [2019-11-27 23:51:23,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-27 23:51:23,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-11-27 23:51:23,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-27 23:51:23,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2019-11-27 23:51:23,837 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 10 [2019-11-27 23:51:23,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 23:51:23,837 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2019-11-27 23:51:23,838 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-27 23:51:23,838 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2019-11-27 23:51:23,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-27 23:51:23,839 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 23:51:23,839 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 23:51:24,042 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2019-11-27 23:51:24,045 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 23:51:24,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 23:51:24,046 INFO L82 PathProgramCache]: Analyzing trace with hash 1001584898, now seen corresponding path program 1 times [2019-11-27 23:51:24,047 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-27 23:51:24,048 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2116920360] [2019-11-27 23:51:24,048 INFO L94 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 [2019-11-27 23:51:24,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 23:51:24,113 INFO L255 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-27 23:51:24,114 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-27 23:51:24,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 23:51:24,147 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-27 23:51:24,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 23:51:24,181 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2116920360] [2019-11-27 23:51:24,182 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-27 23:51:24,182 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-11-27 23:51:24,182 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537392332] [2019-11-27 23:51:24,184 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-27 23:51:24,184 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-27 23:51:24,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-27 23:51:24,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-27 23:51:24,185 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand 6 states. [2019-11-27 23:51:24,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 23:51:24,308 INFO L93 Difference]: Finished difference Result 68 states and 85 transitions. [2019-11-27 23:51:24,309 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-27 23:51:24,309 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2019-11-27 23:51:24,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 23:51:24,310 INFO L225 Difference]: With dead ends: 68 [2019-11-27 23:51:24,310 INFO L226 Difference]: Without dead ends: 59 [2019-11-27 23:51:24,312 INFO L630 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 [2019-11-27 23:51:24,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-11-27 23:51:24,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 31. [2019-11-27 23:51:24,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-11-27 23:51:24,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2019-11-27 23:51:24,320 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 11 [2019-11-27 23:51:24,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 23:51:24,320 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2019-11-27 23:51:24,320 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-27 23:51:24,320 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2019-11-27 23:51:24,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-27 23:51:24,321 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 23:51:24,321 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 23:51:24,524 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2019-11-27 23:51:24,524 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 23:51:24,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 23:51:24,524 INFO L82 PathProgramCache]: Analyzing trace with hash 1219247017, now seen corresponding path program 1 times [2019-11-27 23:51:24,525 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-27 23:51:24,526 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1000626270] [2019-11-27 23:51:24,526 INFO L94 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 [2019-11-27 23:51:24,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 23:51:24,589 INFO L255 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-27 23:51:24,592 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-27 23:51:24,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 23:51:24,623 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-27 23:51:24,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 23:51:24,659 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1000626270] [2019-11-27 23:51:24,659 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-27 23:51:24,659 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2019-11-27 23:51:24,660 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547051719] [2019-11-27 23:51:24,660 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-27 23:51:24,661 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-27 23:51:24,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-27 23:51:24,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-27 23:51:24,662 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 4 states. [2019-11-27 23:51:24,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 23:51:24,727 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2019-11-27 23:51:24,728 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-27 23:51:24,728 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2019-11-27 23:51:24,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 23:51:24,729 INFO L225 Difference]: With dead ends: 52 [2019-11-27 23:51:24,729 INFO L226 Difference]: Without dead ends: 26 [2019-11-27 23:51:24,730 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-27 23:51:24,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-27 23:51:24,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-11-27 23:51:24,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-27 23:51:24,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2019-11-27 23:51:24,736 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 14 [2019-11-27 23:51:24,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 23:51:24,737 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2019-11-27 23:51:24,737 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-27 23:51:24,737 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2019-11-27 23:51:24,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-27 23:51:24,738 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 23:51:24,738 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 23:51:24,953 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2019-11-27 23:51:24,953 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 23:51:24,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 23:51:24,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1012446717, now seen corresponding path program 1 times [2019-11-27 23:51:24,954 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-27 23:51:24,954 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [72914129] [2019-11-27 23:51:24,955 INFO L94 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 [2019-11-27 23:51:25,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 23:51:25,019 INFO L255 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-27 23:51:25,020 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-27 23:51:25,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 23:51:25,033 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-27 23:51:25,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 23:51:25,053 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [72914129] [2019-11-27 23:51:25,054 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-27 23:51:25,054 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-11-27 23:51:25,054 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485038046] [2019-11-27 23:51:25,055 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-27 23:51:25,055 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-27 23:51:25,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-27 23:51:25,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-27 23:51:25,056 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand 6 states. [2019-11-27 23:51:25,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 23:51:25,145 INFO L93 Difference]: Finished difference Result 61 states and 71 transitions. [2019-11-27 23:51:25,149 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-27 23:51:25,149 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2019-11-27 23:51:25,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 23:51:25,150 INFO L225 Difference]: With dead ends: 61 [2019-11-27 23:51:25,151 INFO L226 Difference]: Without dead ends: 52 [2019-11-27 23:51:25,151 INFO L630 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 [2019-11-27 23:51:25,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-11-27 23:51:25,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 28. [2019-11-27 23:51:25,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-27 23:51:25,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2019-11-27 23:51:25,159 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 16 [2019-11-27 23:51:25,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 23:51:25,159 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2019-11-27 23:51:25,160 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-27 23:51:25,160 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2019-11-27 23:51:25,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-27 23:51:25,161 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 23:51:25,162 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 23:51:25,377 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2019-11-27 23:51:25,377 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 23:51:25,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 23:51:25,378 INFO L82 PathProgramCache]: Analyzing trace with hash -414082333, now seen corresponding path program 1 times [2019-11-27 23:51:25,378 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-27 23:51:25,378 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1486638022] [2019-11-27 23:51:25,379 INFO L94 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 [2019-11-27 23:51:25,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 23:51:25,436 INFO L255 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-27 23:51:25,438 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-27 23:51:25,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 23:51:25,465 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-27 23:51:25,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 23:51:25,490 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1486638022] [2019-11-27 23:51:25,490 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-27 23:51:25,490 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-11-27 23:51:25,490 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766435127] [2019-11-27 23:51:25,491 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-27 23:51:25,491 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-27 23:51:25,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-27 23:51:25,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-27 23:51:25,492 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand 4 states. [2019-11-27 23:51:25,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 23:51:25,511 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2019-11-27 23:51:25,512 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-27 23:51:25,512 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2019-11-27 23:51:25,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 23:51:25,513 INFO L225 Difference]: With dead ends: 38 [2019-11-27 23:51:25,513 INFO L226 Difference]: Without dead ends: 28 [2019-11-27 23:51:25,514 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-27 23:51:25,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-27 23:51:25,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-11-27 23:51:25,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-27 23:51:25,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2019-11-27 23:51:25,520 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 18 [2019-11-27 23:51:25,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 23:51:25,520 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2019-11-27 23:51:25,520 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-27 23:51:25,521 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2019-11-27 23:51:25,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-27 23:51:25,522 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 23:51:25,522 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 23:51:25,742 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2019-11-27 23:51:25,744 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 23:51:25,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 23:51:25,745 INFO L82 PathProgramCache]: Analyzing trace with hash -356824031, now seen corresponding path program 1 times [2019-11-27 23:51:25,746 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-27 23:51:25,746 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1004716495] [2019-11-27 23:51:25,746 INFO L94 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 [2019-11-27 23:51:25,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 23:51:25,821 INFO L255 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-27 23:51:25,823 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-27 23:51:25,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 23:51:25,876 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-27 23:51:25,878 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-27 23:51:25,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 23:51:25,941 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1004716495] [2019-11-27 23:51:25,941 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-27 23:51:25,941 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 9 [2019-11-27 23:51:25,942 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674719434] [2019-11-27 23:51:25,942 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-27 23:51:25,943 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-27 23:51:25,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-27 23:51:25,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2019-11-27 23:51:25,943 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 9 states. [2019-11-27 23:51:26,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 23:51:26,061 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2019-11-27 23:51:26,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-27 23:51:26,063 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 18 [2019-11-27 23:51:26,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 23:51:26,064 INFO L225 Difference]: With dead ends: 40 [2019-11-27 23:51:26,064 INFO L226 Difference]: Without dead ends: 37 [2019-11-27 23:51:26,065 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2019-11-27 23:51:26,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-11-27 23:51:26,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2019-11-27 23:51:26,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-27 23:51:26,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2019-11-27 23:51:26,077 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 18 [2019-11-27 23:51:26,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 23:51:26,078 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2019-11-27 23:51:26,078 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-27 23:51:26,078 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2019-11-27 23:51:26,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-27 23:51:26,080 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 23:51:26,080 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 23:51:26,294 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 mathsat -unsat_core_generation=3 [2019-11-27 23:51:26,295 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 23:51:26,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 23:51:26,296 INFO L82 PathProgramCache]: Analyzing trace with hash -208358251, now seen corresponding path program 1 times [2019-11-27 23:51:26,297 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-27 23:51:26,297 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [430402733] [2019-11-27 23:51:26,298 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 8 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with mathsat -unsat_core_generation=3 [2019-11-27 23:51:26,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 23:51:26,362 INFO L255 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-27 23:51:26,364 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-27 23:51:26,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 23:51:26,399 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-27 23:51:26,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 23:51:26,423 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [430402733] [2019-11-27 23:51:26,424 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-27 23:51:26,424 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2019-11-27 23:51:26,424 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642478706] [2019-11-27 23:51:26,424 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-27 23:51:26,425 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-27 23:51:26,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-27 23:51:26,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-27 23:51:26,426 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 5 states. [2019-11-27 23:51:26,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 23:51:26,498 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2019-11-27 23:51:26,499 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-27 23:51:26,499 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2019-11-27 23:51:26,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 23:51:26,499 INFO L225 Difference]: With dead ends: 43 [2019-11-27 23:51:26,500 INFO L226 Difference]: Without dead ends: 23 [2019-11-27 23:51:26,501 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-27 23:51:26,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-27 23:51:26,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-11-27 23:51:26,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-27 23:51:26,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 22 transitions. [2019-11-27 23:51:26,506 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 22 transitions. Word has length 19 [2019-11-27 23:51:26,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 23:51:26,507 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 22 transitions. [2019-11-27 23:51:26,507 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-27 23:51:26,507 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 22 transitions. [2019-11-27 23:51:26,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-27 23:51:26,508 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 23:51:26,509 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 23:51:26,722 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 mathsat -unsat_core_generation=3 [2019-11-27 23:51:26,722 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 23:51:26,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 23:51:26,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1524231306, now seen corresponding path program 1 times [2019-11-27 23:51:26,723 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-27 23:51:26,724 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1937464941] [2019-11-27 23:51:26,724 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 9 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with mathsat -unsat_core_generation=3 [2019-11-27 23:51:26,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-27 23:51:26,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-27 23:51:26,913 INFO L174 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2019-11-27 23:51:26,913 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-27 23:51:27,114 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 mathsat -unsat_core_generation=3 [2019-11-27 23:51:27,162 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.11 11:51:27 BoogieIcfgContainer [2019-11-27 23:51:27,162 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-27 23:51:27,162 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-27 23:51:27,162 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-27 23:51:27,163 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-27 23:51:27,163 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 11:51:23" (3/4) ... [2019-11-27 23:51:27,165 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-27 23:51:27,222 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-11-27 23:51:27,222 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-27 23:51:27,225 INFO L168 Benchmark]: Toolchain (without parser) took 4639.97 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 91.2 MB). Free memory was 955.0 MB in the beginning and 863.5 MB in the end (delta: 91.6 MB). Peak memory consumption was 182.8 MB. Max. memory is 11.5 GB. [2019-11-27 23:51:27,226 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 1.0 GB. Free memory is still 981.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-27 23:51:27,227 INFO L168 Benchmark]: CACSL2BoogieTranslator took 395.32 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 91.2 MB). Free memory was 955.0 MB in the beginning and 1.1 GB in the end (delta: -132.0 MB). Peak memory consumption was 20.8 MB. Max. memory is 11.5 GB. [2019-11-27 23:51:27,227 INFO L168 Benchmark]: Boogie Procedure Inliner took 47.44 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-27 23:51:27,228 INFO L168 Benchmark]: Boogie Preprocessor took 37.16 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.9 MB). Peak memory consumption was 6.9 MB. Max. memory is 11.5 GB. [2019-11-27 23:51:27,228 INFO L168 Benchmark]: RCFGBuilder took 463.55 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 27.0 MB). Peak memory consumption was 27.0 MB. Max. memory is 11.5 GB. [2019-11-27 23:51:27,229 INFO L168 Benchmark]: TraceAbstraction took 3631.05 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 863.5 MB in the end (delta: 189.7 MB). Peak memory consumption was 189.7 MB. Max. memory is 11.5 GB. [2019-11-27 23:51:27,229 INFO L168 Benchmark]: Witness Printer took 60.28 ms. Allocated memory is still 1.1 GB. Free memory is still 863.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-27 23:51:27,233 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 1.0 GB. Free memory is still 981.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 395.32 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 91.2 MB). Free memory was 955.0 MB in the beginning and 1.1 GB in the end (delta: -132.0 MB). Peak memory consumption was 20.8 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 47.44 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 37.16 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.9 MB). Peak memory consumption was 6.9 MB. Max. memory is 11.5 GB. * RCFGBuilder took 463.55 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 27.0 MB). Peak memory consumption was 27.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 3631.05 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 863.5 MB in the end (delta: 189.7 MB). Peak memory consumption was 189.7 MB. Max. memory is 11.5 GB. * Witness Printer took 60.28 ms. Allocated memory is still 1.1 GB. Free memory is still 863.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 79]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L73] float x = 0.0f; [L74] float y = -0.0f; [L21] __uint32_t w; [L24] ieee_float_shape_type gf_u; [L25] gf_u.value = (x) [L26] EXPR gf_u.word [L26] (w) = gf_u.word [L29] COND TRUE w == 0x00000000 || w == 0x80000000 [L30] return 2; [L44] COND FALSE !(__fpclassify_float(x) == 0) [L21] __uint32_t w; [L24] ieee_float_shape_type gf_u; [L25] gf_u.value = (x) [L26] EXPR gf_u.word [L26] (w) = gf_u.word [L29] COND TRUE w == 0x00000000 || w == 0x80000000 [L30] return 2; [L48] COND FALSE !(__fpclassify_float(y) == 0) [L51] EXPR x > y ? x : y [L51] return x > y ? x : y; [L75] float res = fmax_float(x, y); [L78] EXPR res == 0.0f && __signbit_float(res) == 0 [L55] __uint32_t w; [L58] ieee_float_shape_type gf_u; [L59] gf_u.value = (x) [L60] EXPR gf_u.word [L60] (w) = gf_u.word [L63] return (w & 0x80000000) != 0; [L78] EXPR res == 0.0f && __signbit_float(res) == 0 [L78] COND TRUE !(res == 0.0f && __signbit_float(res) == 0) [L79] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 32 locations, 1 error locations. Result: UNSAFE, OverallTime: 3.5s, OverallIterations: 8, TraceHistogramMax: 1, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 222 SDtfs, 191 SDslu, 324 SDs, 0 SdLazy, 100 SolverSat, 16 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 209 GetRequests, 169 SyntacticMatches, 7 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred 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, 7 MinimizatonAttempts, 59 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 128 NumberOfCodeBlocks, 128 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 198 ConstructedInterpolants, 0 QuantifiedInterpolants, 7943 SizeOfPredicates, 27 NumberOfNonLiveVariables, 328 ConjunctsInSsa, 40 ConjunctsInUnsatCore, 14 InterpolantComputations, 14 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...