./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/float-newlib/double_req_bl_1251b.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9a8b2e8d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/float-newlib/double_req_bl_1251b.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0dca3295f12b1ef36cf31c463cf879069525072f ................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/float-newlib/double_req_bl_1251b.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0dca3295f12b1ef36cf31c463cf879069525072f .................................................................................................................................................................................................................................................................................................................................................... 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 0.1.25-9a8b2e8 [2020-10-20 00:33:23,172 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 00:33:23,175 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 00:33:23,201 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 00:33:23,201 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 00:33:23,202 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 00:33:23,204 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 00:33:23,206 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 00:33:23,207 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 00:33:23,228 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 00:33:23,229 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 00:33:23,230 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 00:33:23,231 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 00:33:23,234 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 00:33:23,235 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 00:33:23,239 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 00:33:23,240 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 00:33:23,243 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 00:33:23,245 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 00:33:23,249 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 00:33:23,252 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 00:33:23,264 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 00:33:23,265 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 00:33:23,266 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 00:33:23,269 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 00:33:23,269 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 00:33:23,269 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 00:33:23,270 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 00:33:23,271 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 00:33:23,272 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 00:33:23,272 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 00:33:23,273 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 00:33:23,274 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 00:33:23,275 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 00:33:23,276 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 00:33:23,277 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 00:33:23,277 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 00:33:23,278 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 00:33:23,278 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 00:33:23,279 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 00:33:23,280 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 00:33:23,281 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-20 00:33:23,304 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 00:33:23,305 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 00:33:23,306 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 00:33:23,306 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 00:33:23,306 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 00:33:23,307 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 00:33:23,307 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 00:33:23,307 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-20 00:33:23,308 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 00:33:23,308 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 00:33:23,308 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-20 00:33:23,308 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 00:33:23,309 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-20 00:33:23,309 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 00:33:23,309 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-20 00:33:23,309 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 00:33:23,310 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-20 00:33:23,310 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 00:33:23,310 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 00:33:23,310 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 00:33:23,311 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 00:33:23,311 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 00:33:23,311 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 00:33:23,311 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 00:33:23,312 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-20 00:33:23,312 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-20 00:33:23,312 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-20 00:33:23,313 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-20 00:33:23,313 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 00:33:23,313 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0dca3295f12b1ef36cf31c463cf879069525072f [2020-10-20 00:33:23,541 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 00:33:23,556 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 00:33:23,560 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 00:33:23,562 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 00:33:23,563 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 00:33:23,564 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-newlib/double_req_bl_1251b.c [2020-10-20 00:33:23,642 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5dfe4573b/ec6790462dd540f292664d569c1bc316/FLAG2a4c72a35 [2020-10-20 00:33:24,157 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 00:33:24,161 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-newlib/double_req_bl_1251b.c [2020-10-20 00:33:24,169 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5dfe4573b/ec6790462dd540f292664d569c1bc316/FLAG2a4c72a35 [2020-10-20 00:33:24,521 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5dfe4573b/ec6790462dd540f292664d569c1bc316 [2020-10-20 00:33:24,525 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 00:33:24,532 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-20 00:33:24,533 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 00:33:24,533 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 00:33:24,542 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 00:33:24,543 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:33:24" (1/1) ... [2020-10-20 00:33:24,547 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c0dd090 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:33:24, skipping insertion in model container [2020-10-20 00:33:24,547 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:33:24" (1/1) ... [2020-10-20 00:33:24,556 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 00:33:24,584 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 00:33:24,877 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:33:24,889 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 00:33:24,945 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:33:24,971 INFO L208 MainTranslator]: Completed translation [2020-10-20 00:33:24,971 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:33:24 WrapperNode [2020-10-20 00:33:24,972 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 00:33:24,972 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-20 00:33:24,973 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-20 00:33:24,973 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-20 00:33:24,982 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:33:24" (1/1) ... [2020-10-20 00:33:25,006 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:33:24" (1/1) ... [2020-10-20 00:33:25,053 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-20 00:33:25,053 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 00:33:25,054 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 00:33:25,054 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 00:33:25,065 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:33:24" (1/1) ... [2020-10-20 00:33:25,065 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:33:24" (1/1) ... [2020-10-20 00:33:25,080 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:33:24" (1/1) ... [2020-10-20 00:33:25,080 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:33:24" (1/1) ... [2020-10-20 00:33:25,102 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:33:24" (1/1) ... [2020-10-20 00:33:25,110 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:33:24" (1/1) ... [2020-10-20 00:33:25,112 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:33:24" (1/1) ... [2020-10-20 00:33:25,121 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 00:33:25,121 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 00:33:25,122 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 00:33:25,122 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 00:33:25,123 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:33:24" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 00:33:25,189 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-20 00:33:25,190 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 00:33:25,190 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-10-20 00:33:25,190 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 00:33:25,190 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 00:33:25,190 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-20 00:33:25,190 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-20 00:33:25,552 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 00:33:25,553 INFO L298 CfgBuilder]: Removed 18 assume(true) statements. [2020-10-20 00:33:25,555 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:33:25 BoogieIcfgContainer [2020-10-20 00:33:25,555 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 00:33:25,557 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 00:33:25,557 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 00:33:25,561 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 00:33:25,562 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 12:33:24" (1/3) ... [2020-10-20 00:33:25,563 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3daa478d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:33:25, skipping insertion in model container [2020-10-20 00:33:25,563 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:33:24" (2/3) ... [2020-10-20 00:33:25,564 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3daa478d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:33:25, skipping insertion in model container [2020-10-20 00:33:25,564 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:33:25" (3/3) ... [2020-10-20 00:33:25,566 INFO L111 eAbstractionObserver]: Analyzing ICFG double_req_bl_1251b.c [2020-10-20 00:33:25,581 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 00:33:25,589 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-20 00:33:25,606 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-20 00:33:25,647 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 00:33:25,648 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-20 00:33:25,648 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 00:33:25,649 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 00:33:25,649 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 00:33:25,649 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 00:33:25,650 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 00:33:25,650 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 00:33:25,668 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2020-10-20 00:33:25,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-20 00:33:25,683 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:33:25,684 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:33:25,687 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:33:25,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:33:25,702 INFO L82 PathProgramCache]: Analyzing trace with hash -124750094, now seen corresponding path program 1 times [2020-10-20 00:33:25,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:33:25,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972804247] [2020-10-20 00:33:25,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:33:25,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:33:25,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:33:25,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972804247] [2020-10-20 00:33:25,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:33:25,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-20 00:33:25,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074216344] [2020-10-20 00:33:25,890 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-20 00:33:25,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:33:25,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-20 00:33:25,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-20 00:33:25,906 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 2 states. [2020-10-20 00:33:25,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:33:25,930 INFO L93 Difference]: Finished difference Result 57 states and 88 transitions. [2020-10-20 00:33:25,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-20 00:33:25,932 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-10-20 00:33:25,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:33:25,945 INFO L225 Difference]: With dead ends: 57 [2020-10-20 00:33:25,945 INFO L226 Difference]: Without dead ends: 26 [2020-10-20 00:33:25,949 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-20 00:33:25,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-20 00:33:25,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-20 00:33:25,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-20 00:33:25,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 36 transitions. [2020-10-20 00:33:25,987 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 36 transitions. Word has length 11 [2020-10-20 00:33:25,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:33:25,987 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 36 transitions. [2020-10-20 00:33:25,988 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-20 00:33:25,988 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 36 transitions. [2020-10-20 00:33:25,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-20 00:33:25,988 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:33:25,989 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:33:25,989 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-20 00:33:25,989 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:33:25,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:33:25,990 INFO L82 PathProgramCache]: Analyzing trace with hash -1352831344, now seen corresponding path program 1 times [2020-10-20 00:33:25,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:33:25,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470995446] [2020-10-20 00:33:25,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:33:26,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:33:26,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:33:26,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470995446] [2020-10-20 00:33:26,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:33:26,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 00:33:26,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548168376] [2020-10-20 00:33:26,145 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 00:33:26,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:33:26,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 00:33:26,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 00:33:26,146 INFO L87 Difference]: Start difference. First operand 26 states and 36 transitions. Second operand 4 states. [2020-10-20 00:33:26,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:33:26,214 INFO L93 Difference]: Finished difference Result 40 states and 51 transitions. [2020-10-20 00:33:26,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 00:33:26,215 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-10-20 00:33:26,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:33:26,216 INFO L225 Difference]: With dead ends: 40 [2020-10-20 00:33:26,216 INFO L226 Difference]: Without dead ends: 36 [2020-10-20 00:33:26,218 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 00:33:26,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-20 00:33:26,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 28. [2020-10-20 00:33:26,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-20 00:33:26,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 38 transitions. [2020-10-20 00:33:26,225 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 38 transitions. Word has length 12 [2020-10-20 00:33:26,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:33:26,225 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 38 transitions. [2020-10-20 00:33:26,225 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 00:33:26,225 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2020-10-20 00:33:26,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-20 00:33:26,226 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:33:26,226 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:33:26,226 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-20 00:33:26,227 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:33:26,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:33:26,227 INFO L82 PathProgramCache]: Analyzing trace with hash -1913129681, now seen corresponding path program 1 times [2020-10-20 00:33:26,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:33:26,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752249713] [2020-10-20 00:33:26,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:33:26,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:33:26,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:33:26,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752249713] [2020-10-20 00:33:26,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:33:26,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 00:33:26,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460983617] [2020-10-20 00:33:26,329 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 00:33:26,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:33:26,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 00:33:26,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 00:33:26,330 INFO L87 Difference]: Start difference. First operand 28 states and 38 transitions. Second operand 4 states. [2020-10-20 00:33:26,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:33:26,400 INFO L93 Difference]: Finished difference Result 42 states and 53 transitions. [2020-10-20 00:33:26,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 00:33:26,401 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-10-20 00:33:26,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:33:26,402 INFO L225 Difference]: With dead ends: 42 [2020-10-20 00:33:26,402 INFO L226 Difference]: Without dead ends: 38 [2020-10-20 00:33:26,403 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 00:33:26,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-20 00:33:26,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 28. [2020-10-20 00:33:26,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-20 00:33:26,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 38 transitions. [2020-10-20 00:33:26,410 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 38 transitions. Word has length 13 [2020-10-20 00:33:26,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:33:26,411 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 38 transitions. [2020-10-20 00:33:26,411 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 00:33:26,411 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2020-10-20 00:33:26,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-20 00:33:26,414 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:33:26,415 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:33:26,415 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-20 00:33:26,415 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:33:26,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:33:26,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1959363189, now seen corresponding path program 1 times [2020-10-20 00:33:26,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:33:26,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206540874] [2020-10-20 00:33:26,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:33:26,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:33:26,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:33:26,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206540874] [2020-10-20 00:33:26,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:33:26,464 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 00:33:26,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135441522] [2020-10-20 00:33:26,465 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 00:33:26,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:33:26,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 00:33:26,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 00:33:26,467 INFO L87 Difference]: Start difference. First operand 28 states and 38 transitions. Second operand 4 states. [2020-10-20 00:33:26,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:33:26,520 INFO L93 Difference]: Finished difference Result 44 states and 55 transitions. [2020-10-20 00:33:26,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 00:33:26,521 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-10-20 00:33:26,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:33:26,522 INFO L225 Difference]: With dead ends: 44 [2020-10-20 00:33:26,522 INFO L226 Difference]: Without dead ends: 40 [2020-10-20 00:33:26,523 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 00:33:26,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-20 00:33:26,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 28. [2020-10-20 00:33:26,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-20 00:33:26,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 38 transitions. [2020-10-20 00:33:26,529 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 38 transitions. Word has length 14 [2020-10-20 00:33:26,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:33:26,529 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 38 transitions. [2020-10-20 00:33:26,530 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 00:33:26,530 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2020-10-20 00:33:26,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-20 00:33:26,531 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:33:26,531 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:33:26,531 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-20 00:33:26,532 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:33:26,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:33:26,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1045511114, now seen corresponding path program 1 times [2020-10-20 00:33:26,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:33:26,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130259258] [2020-10-20 00:33:26,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:33:26,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:33:26,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:33:26,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130259258] [2020-10-20 00:33:26,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:33:26,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 00:33:26,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231631223] [2020-10-20 00:33:26,606 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 00:33:26,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:33:26,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 00:33:26,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 00:33:26,607 INFO L87 Difference]: Start difference. First operand 28 states and 38 transitions. Second operand 4 states. [2020-10-20 00:33:26,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:33:26,651 INFO L93 Difference]: Finished difference Result 42 states and 53 transitions. [2020-10-20 00:33:26,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 00:33:26,652 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-10-20 00:33:26,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:33:26,653 INFO L225 Difference]: With dead ends: 42 [2020-10-20 00:33:26,653 INFO L226 Difference]: Without dead ends: 38 [2020-10-20 00:33:26,654 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 00:33:26,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-20 00:33:26,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 28. [2020-10-20 00:33:26,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-20 00:33:26,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 38 transitions. [2020-10-20 00:33:26,663 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 38 transitions. Word has length 15 [2020-10-20 00:33:26,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:33:26,663 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 38 transitions. [2020-10-20 00:33:26,663 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 00:33:26,663 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2020-10-20 00:33:26,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-20 00:33:26,664 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:33:26,664 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:33:26,664 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-20 00:33:26,665 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:33:26,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:33:26,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1102769416, now seen corresponding path program 1 times [2020-10-20 00:33:26,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:33:26,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550080663] [2020-10-20 00:33:26,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:33:26,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 00:33:26,693 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 00:33:26,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 00:33:26,715 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 00:33:26,758 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 00:33:26,759 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-20 00:33:26,760 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-20 00:33:26,799 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 12:33:26 BoogieIcfgContainer [2020-10-20 00:33:26,799 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-20 00:33:26,800 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 00:33:26,800 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 00:33:26,800 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 00:33:26,801 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:33:25" (3/4) ... [2020-10-20 00:33:26,805 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-10-20 00:33:26,805 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 00:33:26,808 INFO L168 Benchmark]: Toolchain (without parser) took 2280.69 ms. Allocated memory was 41.4 MB in the beginning and 48.2 MB in the end (delta: 6.8 MB). Free memory was 19.9 MB in the beginning and 16.0 MB in the end (delta: 3.9 MB). Peak memory consumption was 10.7 MB. Max. memory is 14.3 GB. [2020-10-20 00:33:26,809 INFO L168 Benchmark]: CDTParser took 0.42 ms. Allocated memory is still 31.5 MB. Free memory was 7.6 MB in the beginning and 7.6 MB in the end (delta: 45.7 kB). Peak memory consumption was 45.7 kB. Max. memory is 14.3 GB. [2020-10-20 00:33:26,810 INFO L168 Benchmark]: CACSL2BoogieTranslator took 439.07 ms. Allocated memory was 41.4 MB in the beginning and 41.9 MB in the end (delta: 524.3 kB). Free memory was 19.1 MB in the beginning and 19.8 MB in the end (delta: -619.4 kB). Peak memory consumption was 10.5 MB. Max. memory is 14.3 GB. [2020-10-20 00:33:26,811 INFO L168 Benchmark]: Boogie Procedure Inliner took 80.73 ms. Allocated memory is still 41.9 MB. Free memory was 19.8 MB in the beginning and 17.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 14.3 GB. [2020-10-20 00:33:26,812 INFO L168 Benchmark]: Boogie Preprocessor took 67.66 ms. Allocated memory is still 41.9 MB. Free memory was 17.6 MB in the beginning and 16.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.5 MB. Max. memory is 14.3 GB. [2020-10-20 00:33:26,813 INFO L168 Benchmark]: RCFGBuilder took 434.07 ms. Allocated memory was 41.9 MB in the beginning and 43.5 MB in the end (delta: 1.6 MB). Free memory was 15.9 MB in the beginning and 12.3 MB in the end (delta: 3.6 MB). Peak memory consumption was 7.0 MB. Max. memory is 14.3 GB. [2020-10-20 00:33:26,814 INFO L168 Benchmark]: TraceAbstraction took 1242.72 ms. Allocated memory was 43.5 MB in the beginning and 48.2 MB in the end (delta: 4.7 MB). Free memory was 11.8 MB in the beginning and 16.4 MB in the end (delta: -4.7 MB). Peak memory consumption was 42.2 kB. Max. memory is 14.3 GB. [2020-10-20 00:33:26,815 INFO L168 Benchmark]: Witness Printer took 5.71 ms. Allocated memory is still 48.2 MB. Free memory was 16.4 MB in the beginning and 16.0 MB in the end (delta: 394.7 kB). Peak memory consumption was 394.7 kB. Max. memory is 14.3 GB. [2020-10-20 00:33:26,821 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.42 ms. Allocated memory is still 31.5 MB. Free memory was 7.6 MB in the beginning and 7.6 MB in the end (delta: 45.7 kB). Peak memory consumption was 45.7 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 439.07 ms. Allocated memory was 41.4 MB in the beginning and 41.9 MB in the end (delta: 524.3 kB). Free memory was 19.1 MB in the beginning and 19.8 MB in the end (delta: -619.4 kB). Peak memory consumption was 10.5 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 80.73 ms. Allocated memory is still 41.9 MB. Free memory was 19.8 MB in the beginning and 17.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 67.66 ms. Allocated memory is still 41.9 MB. Free memory was 17.6 MB in the beginning and 16.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.5 MB. Max. memory is 14.3 GB. * RCFGBuilder took 434.07 ms. Allocated memory was 41.9 MB in the beginning and 43.5 MB in the end (delta: 1.6 MB). Free memory was 15.9 MB in the beginning and 12.3 MB in the end (delta: 3.6 MB). Peak memory consumption was 7.0 MB. Max. memory is 14.3 GB. * TraceAbstraction took 1242.72 ms. Allocated memory was 43.5 MB in the beginning and 48.2 MB in the end (delta: 4.7 MB). Free memory was 11.8 MB in the beginning and 16.4 MB in the end (delta: -4.7 MB). Peak memory consumption was 42.2 kB. Max. memory is 14.3 GB. * Witness Printer took 5.71 ms. Allocated memory is still 48.2 MB. Free memory was 16.4 MB in the beginning and 16.0 MB in the end (delta: 394.7 kB). Peak memory consumption was 394.7 kB. Max. memory is 14.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 3]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryDOUBLEComparisonOperation at line 79, overapproximation of someBinaryArithmeticDOUBLEoperation at line 67. Possible FailurePath: [L66] double x = __VERIFIER_nondet_double(); [L67] double y = 0.0 / 0.0; [L18] return x != x; [L74] COND TRUE !isnan_double(x) [L29] __uint32_t msw, lsw; [L32] ieee_double_shape_type ew_u; [L33] ew_u.value = (x) [L34] EXPR ew_u.parts.msw [L34] (msw) = ew_u.parts.msw [L35] EXPR ew_u.parts.lsw [L35] (lsw) = ew_u.parts.lsw [L38-L39] COND FALSE !((msw == 0x00000000 && lsw == 0x00000000) || (msw == 0x80000000 && lsw == 0x00000000)) [L41-L42] COND FALSE !((msw >= 0x00100000 && msw <= 0x7fefffff) || (msw >= 0x80100000 && msw <= 0xffefffff)) [L44-L45] COND FALSE !(( msw <= 0x000fffff) || (msw >= 0x80000000 && msw <= 0x800fffff)) [L48-L49] COND FALSE !((msw == 0x7ff00000 && lsw == 0x00000000) || (msw == 0xfff00000 && lsw == 0x00000000)) [L52] return 0; [L57] COND TRUE __fpclassify_double(x) == 0 [L58] return y; [L76] double res = fmax_double(x, y); [L79] COND TRUE res != x [L3] __assert_fail("0", "double_req_bl_1251b.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 31 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.1s, OverallIterations: 6, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 209 SDtfs, 40 SDslu, 242 SDs, 0 SdLazy, 84 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 40 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 80 NumberOfCodeBlocks, 80 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 60 ConstructedInterpolants, 0 QuantifiedInterpolants, 930 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.1.25-9a8b2e8 [2020-10-20 00:33:29,059 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 00:33:29,063 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 00:33:29,103 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 00:33:29,103 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 00:33:29,113 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 00:33:29,115 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 00:33:29,119 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 00:33:29,122 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 00:33:29,125 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 00:33:29,127 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 00:33:29,128 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 00:33:29,129 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 00:33:29,132 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 00:33:29,133 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 00:33:29,135 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 00:33:29,136 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 00:33:29,137 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 00:33:29,139 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 00:33:29,146 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 00:33:29,148 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 00:33:29,159 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 00:33:29,162 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 00:33:29,162 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 00:33:29,175 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 00:33:29,175 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 00:33:29,175 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 00:33:29,181 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 00:33:29,182 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 00:33:29,183 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 00:33:29,183 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 00:33:29,183 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 00:33:29,184 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 00:33:29,185 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 00:33:29,186 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 00:33:29,186 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 00:33:29,187 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 00:33:29,187 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 00:33:29,187 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 00:33:29,188 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 00:33:29,189 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 00:33:29,189 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2020-10-20 00:33:29,218 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 00:33:29,218 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 00:33:29,220 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 00:33:29,220 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 00:33:29,220 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 00:33:29,221 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 00:33:29,221 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 00:33:29,221 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 00:33:29,221 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 00:33:29,222 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-20 00:33:29,223 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 00:33:29,223 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-20 00:33:29,223 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-10-20 00:33:29,224 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-10-20 00:33:29,224 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 00:33:29,224 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-20 00:33:29,224 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 00:33:29,225 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-20 00:33:29,225 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 00:33:29,225 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 00:33:29,226 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 00:33:29,226 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 00:33:29,226 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 00:33:29,226 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 00:33:29,227 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 00:33:29,227 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-20 00:33:29,227 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2020-10-20 00:33:29,227 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-10-20 00:33:29,227 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-20 00:33:29,228 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 00:33:29,228 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-20 00:33:29,228 INFO L138 SettingsManager]: * Logic for external solver=AUFBV Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0dca3295f12b1ef36cf31c463cf879069525072f [2020-10-20 00:33:29,443 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 00:33:29,456 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 00:33:29,460 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 00:33:29,461 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 00:33:29,462 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 00:33:29,463 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-newlib/double_req_bl_1251b.c [2020-10-20 00:33:29,536 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/223421423/c543a2db75bd487d85b278fe1d675dc5/FLAGb33916b99 [2020-10-20 00:33:30,121 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 00:33:30,122 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-newlib/double_req_bl_1251b.c [2020-10-20 00:33:30,129 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/223421423/c543a2db75bd487d85b278fe1d675dc5/FLAGb33916b99 [2020-10-20 00:33:30,540 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/223421423/c543a2db75bd487d85b278fe1d675dc5 [2020-10-20 00:33:30,544 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 00:33:30,551 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-20 00:33:30,552 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 00:33:30,553 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 00:33:30,558 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 00:33:30,560 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:33:30" (1/1) ... [2020-10-20 00:33:30,564 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@692ff561 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:33:30, skipping insertion in model container [2020-10-20 00:33:30,564 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:33:30" (1/1) ... [2020-10-20 00:33:30,573 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 00:33:30,598 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 00:33:30,845 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:33:30,865 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 00:33:30,896 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:33:30,922 INFO L208 MainTranslator]: Completed translation [2020-10-20 00:33:30,923 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:33:30 WrapperNode [2020-10-20 00:33:30,923 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 00:33:30,924 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-20 00:33:30,924 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-20 00:33:30,925 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-20 00:33:30,935 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:33:30" (1/1) ... [2020-10-20 00:33:30,950 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:33:30" (1/1) ... [2020-10-20 00:33:30,981 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-20 00:33:30,982 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 00:33:30,982 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 00:33:30,982 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 00:33:30,993 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:33:30" (1/1) ... [2020-10-20 00:33:30,994 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:33:30" (1/1) ... [2020-10-20 00:33:30,998 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:33:30" (1/1) ... [2020-10-20 00:33:30,998 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:33:30" (1/1) ... [2020-10-20 00:33:31,008 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:33:30" (1/1) ... [2020-10-20 00:33:31,013 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:33:30" (1/1) ... [2020-10-20 00:33:31,016 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:33:30" (1/1) ... [2020-10-20 00:33:31,020 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 00:33:31,023 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 00:33:31,024 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 00:33:31,024 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 00:33:31,025 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:33:30" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 00:33:31,135 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE8 [2020-10-20 00:33:31,136 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-10-20 00:33:31,136 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 00:33:31,136 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2020-10-20 00:33:31,136 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 00:33:31,137 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 00:33:31,137 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-20 00:33:31,545 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 00:33:31,545 INFO L298 CfgBuilder]: Removed 18 assume(true) statements. [2020-10-20 00:33:31,547 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:33:31 BoogieIcfgContainer [2020-10-20 00:33:31,547 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 00:33:31,548 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 00:33:31,548 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 00:33:31,552 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 00:33:31,552 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 12:33:30" (1/3) ... [2020-10-20 00:33:31,553 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f6bb1c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:33:31, skipping insertion in model container [2020-10-20 00:33:31,553 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:33:30" (2/3) ... [2020-10-20 00:33:31,554 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f6bb1c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:33:31, skipping insertion in model container [2020-10-20 00:33:31,554 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:33:31" (3/3) ... [2020-10-20 00:33:31,557 INFO L111 eAbstractionObserver]: Analyzing ICFG double_req_bl_1251b.c [2020-10-20 00:33:31,573 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 00:33:31,583 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-20 00:33:31,615 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-20 00:33:31,677 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 00:33:31,677 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-20 00:33:31,677 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 00:33:31,678 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 00:33:31,680 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 00:33:31,680 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 00:33:31,681 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 00:33:31,681 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 00:33:31,716 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2020-10-20 00:33:31,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-20 00:33:31,723 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:33:31,724 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:33:31,724 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:33:31,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:33:31,731 INFO L82 PathProgramCache]: Analyzing trace with hash -124750094, now seen corresponding path program 1 times [2020-10-20 00:33:31,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-20 00:33:31,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [152042837] [2020-10-20 00:33:31,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-10-20 00:33:31,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:33:31,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 1 conjunts are in the unsatisfiable core [2020-10-20 00:33:31,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:33:31,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:33:31,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-20 00:33:31,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:33:31,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [152042837] [2020-10-20 00:33:31,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:33:31,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-10-20 00:33:31,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192825802] [2020-10-20 00:33:31,915 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-20 00:33:31,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-20 00:33:31,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-20 00:33:31,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-20 00:33:31,930 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 2 states. [2020-10-20 00:33:31,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:33:31,952 INFO L93 Difference]: Finished difference Result 57 states and 88 transitions. [2020-10-20 00:33:31,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-20 00:33:31,953 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-10-20 00:33:31,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:33:31,965 INFO L225 Difference]: With dead ends: 57 [2020-10-20 00:33:31,965 INFO L226 Difference]: Without dead ends: 26 [2020-10-20 00:33:31,968 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-20 00:33:31,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-20 00:33:32,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-20 00:33:32,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-20 00:33:32,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 36 transitions. [2020-10-20 00:33:32,008 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 36 transitions. Word has length 11 [2020-10-20 00:33:32,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:33:32,009 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 36 transitions. [2020-10-20 00:33:32,009 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-20 00:33:32,009 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 36 transitions. [2020-10-20 00:33:32,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-20 00:33:32,010 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:33:32,010 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:33:32,225 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-10-20 00:33:32,227 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:33:32,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:33:32,228 INFO L82 PathProgramCache]: Analyzing trace with hash -1352831344, now seen corresponding path program 1 times [2020-10-20 00:33:32,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-20 00:33:32,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [615802265] [2020-10-20 00:33:32,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-10-20 00:33:32,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:33:32,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-20 00:33:32,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:33:32,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:33:32,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-20 00:33:32,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:33:32,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [615802265] [2020-10-20 00:33:32,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:33:32,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2020-10-20 00:33:32,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55385235] [2020-10-20 00:33:32,407 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-20 00:33:32,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-20 00:33:32,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-20 00:33:32,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-20 00:33:32,409 INFO L87 Difference]: Start difference. First operand 26 states and 36 transitions. Second operand 6 states. [2020-10-20 00:33:32,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:33:32,539 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2020-10-20 00:33:32,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-20 00:33:32,540 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-10-20 00:33:32,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:33:32,542 INFO L225 Difference]: With dead ends: 50 [2020-10-20 00:33:32,542 INFO L226 Difference]: Without dead ends: 46 [2020-10-20 00:33:32,544 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-20 00:33:32,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-20 00:33:32,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 28. [2020-10-20 00:33:32,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-20 00:33:32,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 38 transitions. [2020-10-20 00:33:32,552 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 38 transitions. Word has length 12 [2020-10-20 00:33:32,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:33:32,552 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 38 transitions. [2020-10-20 00:33:32,552 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-20 00:33:32,553 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2020-10-20 00:33:32,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-20 00:33:32,554 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:33:32,554 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:33:32,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-10-20 00:33:32,768 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:33:32,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:33:32,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1102769416, now seen corresponding path program 1 times [2020-10-20 00:33:32,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-20 00:33:32,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [892229915] [2020-10-20 00:33:32,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2020-10-20 00:33:32,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 00:33:32,919 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 00:33:32,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 00:33:32,994 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 00:33:33,048 INFO L173 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2020-10-20 00:33:33,048 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-20 00:33:33,256 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-10-20 00:33:33,293 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 12:33:33 BoogieIcfgContainer [2020-10-20 00:33:33,293 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-20 00:33:33,294 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 00:33:33,294 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 00:33:33,294 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 00:33:33,295 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:33:31" (3/4) ... [2020-10-20 00:33:33,298 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-20 00:33:33,354 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-20 00:33:33,355 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 00:33:33,357 INFO L168 Benchmark]: Toolchain (without parser) took 2810.93 ms. Allocated memory was 40.9 MB in the beginning and 49.8 MB in the end (delta: 8.9 MB). Free memory was 18.7 MB in the beginning and 18.2 MB in the end (delta: 434.0 kB). Peak memory consumption was 9.3 MB. Max. memory is 14.3 GB. [2020-10-20 00:33:33,358 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 31.5 MB. Free memory was 7.7 MB in the beginning and 7.6 MB in the end (delta: 43.7 kB). Peak memory consumption was 43.7 kB. Max. memory is 14.3 GB. [2020-10-20 00:33:33,359 INFO L168 Benchmark]: CACSL2BoogieTranslator took 371.37 ms. Allocated memory was 40.9 MB in the beginning and 41.9 MB in the end (delta: 1.0 MB). Free memory was 17.7 MB in the beginning and 16.0 MB in the end (delta: 1.7 MB). Peak memory consumption was 9.0 MB. Max. memory is 14.3 GB. [2020-10-20 00:33:33,360 INFO L168 Benchmark]: Boogie Procedure Inliner took 57.39 ms. Allocated memory is still 41.9 MB. Free memory was 16.0 MB in the beginning and 13.8 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.2 MB. Max. memory is 14.3 GB. [2020-10-20 00:33:33,361 INFO L168 Benchmark]: Boogie Preprocessor took 37.88 ms. Allocated memory is still 41.9 MB. Free memory was 13.8 MB in the beginning and 11.9 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 14.3 GB. [2020-10-20 00:33:33,361 INFO L168 Benchmark]: RCFGBuilder took 523.86 ms. Allocated memory was 41.9 MB in the beginning and 44.6 MB in the end (delta: 2.6 MB). Free memory was 11.9 MB in the beginning and 23.6 MB in the end (delta: -11.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 14.3 GB. [2020-10-20 00:33:33,362 INFO L168 Benchmark]: TraceAbstraction took 1745.31 ms. Allocated memory was 44.6 MB in the beginning and 49.8 MB in the end (delta: 5.2 MB). Free memory was 23.1 MB in the beginning and 21.3 MB in the end (delta: 1.8 MB). Peak memory consumption was 7.1 MB. Max. memory is 14.3 GB. [2020-10-20 00:33:33,363 INFO L168 Benchmark]: Witness Printer took 61.21 ms. Allocated memory is still 49.8 MB. Free memory was 21.3 MB in the beginning and 18.2 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 14.3 GB. [2020-10-20 00:33:33,367 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 31.5 MB. Free memory was 7.7 MB in the beginning and 7.6 MB in the end (delta: 43.7 kB). Peak memory consumption was 43.7 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 371.37 ms. Allocated memory was 40.9 MB in the beginning and 41.9 MB in the end (delta: 1.0 MB). Free memory was 17.7 MB in the beginning and 16.0 MB in the end (delta: 1.7 MB). Peak memory consumption was 9.0 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 57.39 ms. Allocated memory is still 41.9 MB. Free memory was 16.0 MB in the beginning and 13.8 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.2 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 37.88 ms. Allocated memory is still 41.9 MB. Free memory was 13.8 MB in the beginning and 11.9 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 14.3 GB. * RCFGBuilder took 523.86 ms. Allocated memory was 41.9 MB in the beginning and 44.6 MB in the end (delta: 2.6 MB). Free memory was 11.9 MB in the beginning and 23.6 MB in the end (delta: -11.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 14.3 GB. * TraceAbstraction took 1745.31 ms. Allocated memory was 44.6 MB in the beginning and 49.8 MB in the end (delta: 5.2 MB). Free memory was 23.1 MB in the beginning and 21.3 MB in the end (delta: 1.8 MB). Peak memory consumption was 7.1 MB. Max. memory is 14.3 GB. * Witness Printer took 61.21 ms. Allocated memory is still 49.8 MB. Free memory was 21.3 MB in the beginning and 18.2 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 14.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L66] double x = __VERIFIER_nondet_double(); [L67] double y = 0.0 / 0.0; [L18] return x != x; [L74] COND TRUE !isnan_double(x) [L29] __uint32_t msw, lsw; [L32] ieee_double_shape_type ew_u; [L33] ew_u.value = (x) [L34] EXPR ew_u.parts.msw [L34] (msw) = ew_u.parts.msw [L35] EXPR ew_u.parts.lsw [L35] (lsw) = ew_u.parts.lsw [L38-L39] COND FALSE !((msw == 0x00000000 && lsw == 0x00000000) || (msw == 0x80000000 && lsw == 0x00000000)) [L41-L42] COND FALSE !((msw >= 0x00100000 && msw <= 0x7fefffff) || (msw >= 0x80100000 && msw <= 0xffefffff)) [L44-L45] COND FALSE !(( msw <= 0x000fffff) || (msw >= 0x80000000 && msw <= 0x800fffff)) [L48-L49] COND FALSE !((msw == 0x7ff00000 && lsw == 0x00000000) || (msw == 0xfff00000 && lsw == 0x00000000)) [L52] return 0; [L57] COND TRUE __fpclassify_double(x) == 0 [L58] return y; [L76] double res = fmax_double(x, y); [L79] COND TRUE res != x [L3] __assert_fail("0", "double_req_bl_1251b.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 31 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.5s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 77 SDtfs, 30 SDslu, 98 SDs, 0 SdLazy, 27 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 44 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 18 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 38 NumberOfCodeBlocks, 38 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 42 ConstructedInterpolants, 0 QuantifiedInterpolants, 552 SizeOfPredicates, 1 NumberOfNonLiveVariables, 101 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...