./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/floats-cdfpl/square_2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 54858612 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_1.5.800.v20200727-1323.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/floats-cdfpl/square_2.i -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 e4a477de7e338b2b004255d636f7482e0c252b22 ............................................................................................................................................................................................................................................................................ 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_1.5.800.v20200727-1323.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/floats-cdfpl/square_2.i -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 e4a477de7e338b2b004255d636f7482e0c252b22 ........................................................................................................................................................................................................................................................................................ 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 0.2.0-5485861 [2020-10-25 21:33:16,360 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-25 21:33:16,363 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-25 21:33:16,397 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-25 21:33:16,398 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-25 21:33:16,399 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-25 21:33:16,401 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-25 21:33:16,404 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-25 21:33:16,406 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-25 21:33:16,407 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-25 21:33:16,409 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-25 21:33:16,410 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-25 21:33:16,411 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-25 21:33:16,412 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-25 21:33:16,414 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-25 21:33:16,415 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-25 21:33:16,417 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-25 21:33:16,418 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-25 21:33:16,420 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-25 21:33:16,422 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-25 21:33:16,424 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-25 21:33:16,426 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-25 21:33:16,428 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-25 21:33:16,429 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-25 21:33:16,432 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-25 21:33:16,433 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-25 21:33:16,433 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-25 21:33:16,435 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-25 21:33:16,436 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-25 21:33:16,437 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-25 21:33:16,437 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-25 21:33:16,438 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-25 21:33:16,439 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-25 21:33:16,441 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-25 21:33:16,442 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-25 21:33:16,442 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-25 21:33:16,443 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-25 21:33:16,444 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-25 21:33:16,444 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-25 21:33:16,451 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-25 21:33:16,452 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-25 21:33:16,454 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-25 21:33:16,482 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-25 21:33:16,482 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-25 21:33:16,484 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-25 21:33:16,484 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-25 21:33:16,485 INFO L138 SettingsManager]: * Use SBE=true [2020-10-25 21:33:16,485 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-25 21:33:16,485 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-25 21:33:16,486 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-25 21:33:16,486 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-25 21:33:16,486 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-25 21:33:16,487 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-25 21:33:16,487 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-25 21:33:16,487 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-25 21:33:16,487 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-25 21:33:16,488 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-25 21:33:16,488 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-25 21:33:16,488 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-25 21:33:16,489 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-25 21:33:16,489 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-25 21:33:16,489 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-25 21:33:16,489 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-25 21:33:16,490 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-25 21:33:16,490 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-25 21:33:16,490 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-25 21:33:16,491 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-25 21:33:16,491 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-25 21:33:16,491 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-25 21:33:16,492 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-25 21:33:16,492 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-25 21:33:16,492 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e4a477de7e338b2b004255d636f7482e0c252b22 [2020-10-25 21:33:16,969 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-25 21:33:17,018 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-25 21:33:17,023 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-25 21:33:17,025 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-25 21:33:17,027 INFO L275 PluginConnector]: CDTParser initialized [2020-10-25 21:33:17,029 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/floats-cdfpl/square_2.i [2020-10-25 21:33:17,126 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af43a4e5f/9715e12d337f493da188c7149b1dd460/FLAG481b9db77 [2020-10-25 21:33:17,704 INFO L306 CDTParser]: Found 1 translation units. [2020-10-25 21:33:17,705 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/floats-cdfpl/square_2.i [2020-10-25 21:33:17,713 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af43a4e5f/9715e12d337f493da188c7149b1dd460/FLAG481b9db77 [2020-10-25 21:33:18,099 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af43a4e5f/9715e12d337f493da188c7149b1dd460 [2020-10-25 21:33:18,112 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-25 21:33:18,121 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-25 21:33:18,126 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-25 21:33:18,127 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-25 21:33:18,139 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-25 21:33:18,140 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 09:33:18" (1/1) ... [2020-10-25 21:33:18,150 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ba2461d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:33:18, skipping insertion in model container [2020-10-25 21:33:18,151 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 09:33:18" (1/1) ... [2020-10-25 21:33:18,188 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-25 21:33:18,218 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-25 21:33:18,404 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-25 21:33:18,415 INFO L203 MainTranslator]: Completed pre-run [2020-10-25 21:33:18,434 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-25 21:33:18,451 INFO L208 MainTranslator]: Completed translation [2020-10-25 21:33:18,452 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:33:18 WrapperNode [2020-10-25 21:33:18,452 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-25 21:33:18,454 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-25 21:33:18,454 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-25 21:33:18,454 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-25 21:33:18,464 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:33:18" (1/1) ... [2020-10-25 21:33:18,473 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:33:18" (1/1) ... [2020-10-25 21:33:18,494 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-25 21:33:18,495 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-25 21:33:18,495 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-25 21:33:18,495 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-25 21:33:18,505 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:33:18" (1/1) ... [2020-10-25 21:33:18,506 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:33:18" (1/1) ... [2020-10-25 21:33:18,507 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:33:18" (1/1) ... [2020-10-25 21:33:18,508 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:33:18" (1/1) ... [2020-10-25 21:33:18,513 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:33:18" (1/1) ... [2020-10-25 21:33:18,515 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:33:18" (1/1) ... [2020-10-25 21:33:18,517 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:33:18" (1/1) ... [2020-10-25 21:33:18,519 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-25 21:33:18,520 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-25 21:33:18,520 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-25 21:33:18,520 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-25 21:33:18,521 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:33:18" (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 [2020-10-25 21:33:18,610 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-25 21:33:18,611 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-25 21:33:18,611 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-25 21:33:18,611 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-25 21:33:18,830 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-25 21:33:18,831 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-25 21:33:18,833 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 09:33:18 BoogieIcfgContainer [2020-10-25 21:33:18,833 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-25 21:33:18,835 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-25 21:33:18,836 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-25 21:33:18,840 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-25 21:33:18,840 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.10 09:33:18" (1/3) ... [2020-10-25 21:33:18,842 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48656891 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 09:33:18, skipping insertion in model container [2020-10-25 21:33:18,842 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:33:18" (2/3) ... [2020-10-25 21:33:18,843 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48656891 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 09:33:18, skipping insertion in model container [2020-10-25 21:33:18,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 09:33:18" (3/3) ... [2020-10-25 21:33:18,845 INFO L111 eAbstractionObserver]: Analyzing ICFG square_2.i [2020-10-25 21:33:18,860 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-25 21:33:18,871 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-25 21:33:18,904 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-25 21:33:18,970 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-25 21:33:18,972 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-25 21:33:18,972 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-25 21:33:18,972 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-25 21:33:18,973 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-25 21:33:18,973 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-25 21:33:18,973 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-25 21:33:18,975 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-25 21:33:19,008 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2020-10-25 21:33:19,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-10-25 21:33:19,020 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 21:33:19,021 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-10-25 21:33:19,021 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 21:33:19,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 21:33:19,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1804966438, now seen corresponding path program 1 times [2020-10-25 21:33:19,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 21:33:19,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410724931] [2020-10-25 21:33:19,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 21:33:19,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 21:33:19,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 21:33:19,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410724931] [2020-10-25 21:33:19,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 21:33:19,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-25 21:33:19,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365664287] [2020-10-25 21:33:19,197 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-25 21:33:19,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 21:33:19,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-25 21:33:19,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-25 21:33:19,217 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 2 states. [2020-10-25 21:33:19,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 21:33:19,234 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2020-10-25 21:33:19,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-25 21:33:19,236 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 7 [2020-10-25 21:33:19,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 21:33:19,245 INFO L225 Difference]: With dead ends: 21 [2020-10-25 21:33:19,246 INFO L226 Difference]: Without dead ends: 8 [2020-10-25 21:33:19,249 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 [2020-10-25 21:33:19,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2020-10-25 21:33:19,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2020-10-25 21:33:19,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-25 21:33:19,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 7 transitions. [2020-10-25 21:33:19,285 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 7 transitions. Word has length 7 [2020-10-25 21:33:19,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 21:33:19,286 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 7 transitions. [2020-10-25 21:33:19,286 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-25 21:33:19,286 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 7 transitions. [2020-10-25 21:33:19,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-10-25 21:33:19,287 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 21:33:19,287 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-10-25 21:33:19,288 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-25 21:33:19,288 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 21:33:19,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 21:33:19,290 INFO L82 PathProgramCache]: Analyzing trace with hash 1806813480, now seen corresponding path program 1 times [2020-10-25 21:33:19,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 21:33:19,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824855000] [2020-10-25 21:33:19,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 21:33:19,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-25 21:33:19,313 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-25 21:33:19,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-25 21:33:19,337 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-25 21:33:19,372 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-25 21:33:19,372 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-25 21:33:19,373 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-25 21:33:19,410 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.10 09:33:19 BoogieIcfgContainer [2020-10-25 21:33:19,410 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-25 21:33:19,411 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-25 21:33:19,416 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-25 21:33:19,417 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-25 21:33:19,418 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 09:33:18" (3/4) ... [2020-10-25 21:33:19,421 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-10-25 21:33:19,422 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-25 21:33:19,427 INFO L168 Benchmark]: Toolchain (without parser) took 1308.94 ms. Allocated memory was 41.9 MB in the beginning and 50.3 MB in the end (delta: 8.4 MB). Free memory was 20.0 MB in the beginning and 23.0 MB in the end (delta: -3.0 MB). Peak memory consumption was 6.9 MB. Max. memory is 16.1 GB. [2020-10-25 21:33:19,430 INFO L168 Benchmark]: CDTParser took 0.37 ms. Allocated memory is still 41.9 MB. Free memory was 22.8 MB in the beginning and 22.7 MB in the end (delta: 70.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 21:33:19,431 INFO L168 Benchmark]: CACSL2BoogieTranslator took 326.68 ms. Allocated memory is still 41.9 MB. Free memory was 19.4 MB in the beginning and 19.1 MB in the end (delta: 266.4 kB). Peak memory consumption was 3.2 MB. Max. memory is 16.1 GB. [2020-10-25 21:33:19,432 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.60 ms. Allocated memory is still 41.9 MB. Free memory was 19.1 MB in the beginning and 17.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-25 21:33:19,433 INFO L168 Benchmark]: Boogie Preprocessor took 23.93 ms. Allocated memory is still 41.9 MB. Free memory was 17.6 MB in the beginning and 16.7 MB in the end (delta: 892.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 21:33:19,435 INFO L168 Benchmark]: RCFGBuilder took 313.77 ms. Allocated memory was 41.9 MB in the beginning and 50.3 MB in the end (delta: 8.4 MB). Free memory was 16.6 MB in the beginning and 26.6 MB in the end (delta: -10.0 MB). Peak memory consumption was 5.0 MB. Max. memory is 16.1 GB. [2020-10-25 21:33:19,436 INFO L168 Benchmark]: TraceAbstraction took 575.10 ms. Allocated memory is still 50.3 MB. Free memory was 26.4 MB in the beginning and 23.2 MB in the end (delta: 3.2 MB). Peak memory consumption was 2.9 MB. Max. memory is 16.1 GB. [2020-10-25 21:33:19,436 INFO L168 Benchmark]: Witness Printer took 10.50 ms. Allocated memory is still 50.3 MB. Free memory was 23.2 MB in the beginning and 23.0 MB in the end (delta: 246.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 21:33:19,443 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37 ms. Allocated memory is still 41.9 MB. Free memory was 22.8 MB in the beginning and 22.7 MB in the end (delta: 70.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 326.68 ms. Allocated memory is still 41.9 MB. Free memory was 19.4 MB in the beginning and 19.1 MB in the end (delta: 266.4 kB). Peak memory consumption was 3.2 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 40.60 ms. Allocated memory is still 41.9 MB. Free memory was 19.1 MB in the beginning and 17.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 23.93 ms. Allocated memory is still 41.9 MB. Free memory was 17.6 MB in the beginning and 16.7 MB in the end (delta: 892.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 313.77 ms. Allocated memory was 41.9 MB in the beginning and 50.3 MB in the end (delta: 8.4 MB). Free memory was 16.6 MB in the beginning and 26.6 MB in the end (delta: -10.0 MB). Peak memory consumption was 5.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 575.10 ms. Allocated memory is still 50.3 MB. Free memory was 26.4 MB in the beginning and 23.2 MB in the end (delta: 3.2 MB). Peak memory consumption was 2.9 MB. Max. memory is 16.1 GB. * Witness Printer took 10.50 ms. Allocated memory is still 50.3 MB. Free memory was 23.2 MB in the beginning and 23.0 MB in the end (delta: 246.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 12]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 28, overapproximation of someBinaryArithmeticFLOAToperation at line 26. Possible FailurePath: [L20] float IN = __VERIFIER_nondet_float(); [L15] COND FALSE !(!cond) [L23] float x = IN; [L25-L26] float result = 1.0f + 0.5f*x - 0.125f*x*x + 0.0625f*x*x*x - 0.0390625f*x*x*x*x; [L28] COND TRUE !(result >= 0.0f && result < 1.398f) [L12] COND FALSE !(0) [L12] __assert_fail ("0", "square_2.c", 7, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.4s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 11 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=12occurred 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, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 14 NumberOfCodeBlocks, 14 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 6 ConstructedInterpolants, 0 QuantifiedInterpolants, 36 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 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 0.2.0-5485861 [2020-10-25 21:33:22,099 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-25 21:33:22,104 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-25 21:33:22,164 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-25 21:33:22,165 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-25 21:33:22,171 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-25 21:33:22,175 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-25 21:33:22,182 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-25 21:33:22,186 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-25 21:33:22,192 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-25 21:33:22,194 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-25 21:33:22,200 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-25 21:33:22,200 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-25 21:33:22,204 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-25 21:33:22,206 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-25 21:33:22,208 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-25 21:33:22,210 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-25 21:33:22,214 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-25 21:33:22,218 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-25 21:33:22,226 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-25 21:33:22,228 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-25 21:33:22,230 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-25 21:33:22,234 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-25 21:33:22,235 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-25 21:33:22,244 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-25 21:33:22,245 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-25 21:33:22,245 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-25 21:33:22,248 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-25 21:33:22,249 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-25 21:33:22,250 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-25 21:33:22,251 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-25 21:33:22,252 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-25 21:33:22,254 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-25 21:33:22,255 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-25 21:33:22,257 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-25 21:33:22,257 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-25 21:33:22,258 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-25 21:33:22,258 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-25 21:33:22,259 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-25 21:33:22,261 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-25 21:33:22,262 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-25 21:33:22,263 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2020-10-25 21:33:22,320 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-25 21:33:22,320 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-25 21:33:22,324 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-25 21:33:22,325 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-25 21:33:22,325 INFO L138 SettingsManager]: * Use SBE=true [2020-10-25 21:33:22,326 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-25 21:33:22,326 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-25 21:33:22,326 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-25 21:33:22,327 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-25 21:33:22,327 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-25 21:33:22,328 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-25 21:33:22,329 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-25 21:33:22,329 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-10-25 21:33:22,329 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-10-25 21:33:22,330 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-25 21:33:22,330 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-25 21:33:22,330 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-25 21:33:22,330 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-25 21:33:22,331 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-25 21:33:22,331 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-25 21:33:22,332 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-25 21:33:22,332 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-25 21:33:22,332 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-25 21:33:22,333 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-25 21:33:22,333 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-25 21:33:22,333 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-25 21:33:22,333 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2020-10-25 21:33:22,334 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-10-25 21:33:22,334 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-25 21:33:22,334 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-25 21:33:22,335 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-25 21:33:22,335 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e4a477de7e338b2b004255d636f7482e0c252b22 [2020-10-25 21:33:22,773 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-25 21:33:22,813 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-25 21:33:22,817 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-25 21:33:22,818 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-25 21:33:22,819 INFO L275 PluginConnector]: CDTParser initialized [2020-10-25 21:33:22,820 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/floats-cdfpl/square_2.i [2020-10-25 21:33:22,911 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ecfcf6c13/c3ebeead7dc14415a2e257db6f04993f/FLAGac2a15808 [2020-10-25 21:33:23,600 INFO L306 CDTParser]: Found 1 translation units. [2020-10-25 21:33:23,601 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/floats-cdfpl/square_2.i [2020-10-25 21:33:23,609 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ecfcf6c13/c3ebeead7dc14415a2e257db6f04993f/FLAGac2a15808 [2020-10-25 21:33:23,964 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ecfcf6c13/c3ebeead7dc14415a2e257db6f04993f [2020-10-25 21:33:23,971 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-25 21:33:23,978 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-25 21:33:23,980 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-25 21:33:23,980 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-25 21:33:23,985 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-25 21:33:23,986 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 09:33:23" (1/1) ... [2020-10-25 21:33:23,990 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44f9ded9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:33:23, skipping insertion in model container [2020-10-25 21:33:23,991 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 09:33:23" (1/1) ... [2020-10-25 21:33:24,000 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-25 21:33:24,017 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-25 21:33:24,248 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-25 21:33:24,274 INFO L203 MainTranslator]: Completed pre-run [2020-10-25 21:33:24,295 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-25 21:33:24,315 INFO L208 MainTranslator]: Completed translation [2020-10-25 21:33:24,315 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:33:24 WrapperNode [2020-10-25 21:33:24,316 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-25 21:33:24,317 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-25 21:33:24,318 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-25 21:33:24,318 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-25 21:33:24,327 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:33:24" (1/1) ... [2020-10-25 21:33:24,338 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:33:24" (1/1) ... [2020-10-25 21:33:24,358 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-25 21:33:24,359 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-25 21:33:24,359 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-25 21:33:24,360 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-25 21:33:24,367 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:33:24" (1/1) ... [2020-10-25 21:33:24,368 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:33:24" (1/1) ... [2020-10-25 21:33:24,371 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:33:24" (1/1) ... [2020-10-25 21:33:24,371 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:33:24" (1/1) ... [2020-10-25 21:33:24,379 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:33:24" (1/1) ... [2020-10-25 21:33:24,382 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:33:24" (1/1) ... [2020-10-25 21:33:24,384 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:33:24" (1/1) ... [2020-10-25 21:33:24,388 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-25 21:33:24,389 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-25 21:33:24,390 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-25 21:33:24,390 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-25 21:33:24,391 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:33:24" (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 [2020-10-25 21:33:24,468 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-10-25 21:33:24,468 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-25 21:33:24,468 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-25 21:33:24,469 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-25 21:33:26,807 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-25 21:33:26,807 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-25 21:33:26,809 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 09:33:26 BoogieIcfgContainer [2020-10-25 21:33:26,810 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-25 21:33:26,812 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-25 21:33:26,812 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-25 21:33:26,816 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-25 21:33:26,816 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.10 09:33:23" (1/3) ... [2020-10-25 21:33:26,817 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a09ac1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 09:33:26, skipping insertion in model container [2020-10-25 21:33:26,817 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:33:24" (2/3) ... [2020-10-25 21:33:26,818 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a09ac1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 09:33:26, skipping insertion in model container [2020-10-25 21:33:26,818 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 09:33:26" (3/3) ... [2020-10-25 21:33:26,820 INFO L111 eAbstractionObserver]: Analyzing ICFG square_2.i [2020-10-25 21:33:26,833 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-25 21:33:26,838 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-25 21:33:26,853 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-25 21:33:26,879 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-25 21:33:26,880 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-25 21:33:26,880 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-25 21:33:26,880 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-25 21:33:26,880 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-25 21:33:26,881 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-25 21:33:26,881 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-25 21:33:26,881 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-25 21:33:26,896 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2020-10-25 21:33:26,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-10-25 21:33:26,901 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 21:33:26,902 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-10-25 21:33:26,903 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 21:33:26,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 21:33:26,908 INFO L82 PathProgramCache]: Analyzing trace with hash 1804966438, now seen corresponding path program 1 times [2020-10-25 21:33:26,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-25 21:33:26,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1922959350] [2020-10-25 21:33:26,923 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 [2020-10-25 21:33:27,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 21:33:27,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 1 conjunts are in the unsatisfiable core [2020-10-25 21:33:27,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 21:33:27,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 21:33:27,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-25 21:33:27,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 21:33:27,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1922959350] [2020-10-25 21:33:27,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-25 21:33:27,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-10-25 21:33:27,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207524230] [2020-10-25 21:33:27,837 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-25 21:33:27,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-25 21:33:27,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-25 21:33:27,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-25 21:33:27,855 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 2 states. [2020-10-25 21:33:27,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 21:33:27,868 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2020-10-25 21:33:27,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-25 21:33:27,870 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 7 [2020-10-25 21:33:27,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 21:33:27,879 INFO L225 Difference]: With dead ends: 21 [2020-10-25 21:33:27,880 INFO L226 Difference]: Without dead ends: 8 [2020-10-25 21:33:27,883 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-25 21:33:27,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2020-10-25 21:33:27,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2020-10-25 21:33:27,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-25 21:33:27,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 7 transitions. [2020-10-25 21:33:27,918 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 7 transitions. Word has length 7 [2020-10-25 21:33:27,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 21:33:27,918 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 7 transitions. [2020-10-25 21:33:27,918 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-25 21:33:27,919 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 7 transitions. [2020-10-25 21:33:27,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-10-25 21:33:27,919 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 21:33:27,919 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-10-25 21:33:28,128 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-10-25 21:33:28,129 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 21:33:28,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 21:33:28,131 INFO L82 PathProgramCache]: Analyzing trace with hash 1806813480, now seen corresponding path program 1 times [2020-10-25 21:33:28,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-25 21:33:28,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [433902049] [2020-10-25 21:33:28,134 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 [2020-10-25 21:34:21,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-25 21:34:21,302 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-25 21:34:51,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-25 21:34:51,474 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-25 21:34:51,561 INFO L173 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2020-10-25 21:34:51,561 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-25 21:34:51,762 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-10-25 21:34:51,790 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.10 09:34:51 BoogieIcfgContainer [2020-10-25 21:34:51,790 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-25 21:34:51,791 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-25 21:34:51,791 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-25 21:34:51,791 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-25 21:34:51,792 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 09:33:26" (3/4) ... [2020-10-25 21:34:51,794 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-25 21:34:51,833 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-25 21:34:51,834 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-25 21:34:51,837 INFO L168 Benchmark]: Toolchain (without parser) took 87862.29 ms. Allocated memory was 48.2 MB in the beginning and 58.7 MB in the end (delta: 10.5 MB). Free memory was 24.8 MB in the beginning and 27.2 MB in the end (delta: -2.4 MB). Peak memory consumption was 9.6 MB. Max. memory is 16.1 GB. [2020-10-25 21:34:51,838 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 48.2 MB. Free memory was 28.1 MB in the beginning and 28.0 MB in the end (delta: 63.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 21:34:51,839 INFO L168 Benchmark]: CACSL2BoogieTranslator took 336.16 ms. Allocated memory was 48.2 MB in the beginning and 58.7 MB in the end (delta: 10.5 MB). Free memory was 24.2 MB in the beginning and 35.8 MB in the end (delta: -11.6 MB). Peak memory consumption was 5.4 MB. Max. memory is 16.1 GB. [2020-10-25 21:34:51,840 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.22 ms. Allocated memory is still 58.7 MB. Free memory was 35.8 MB in the beginning and 34.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-10-25 21:34:51,841 INFO L168 Benchmark]: Boogie Preprocessor took 29.17 ms. Allocated memory is still 58.7 MB. Free memory was 34.4 MB in the beginning and 33.2 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-25 21:34:51,842 INFO L168 Benchmark]: RCFGBuilder took 2420.58 ms. Allocated memory is still 58.7 MB. Free memory was 33.2 MB in the beginning and 37.6 MB in the end (delta: -4.3 MB). Peak memory consumption was 10.0 MB. Max. memory is 16.1 GB. [2020-10-25 21:34:51,842 INFO L168 Benchmark]: TraceAbstraction took 84978.82 ms. Allocated memory is still 58.7 MB. Free memory was 37.1 MB in the beginning and 29.2 MB in the end (delta: 7.9 MB). Peak memory consumption was 6.7 MB. Max. memory is 16.1 GB. [2020-10-25 21:34:51,843 INFO L168 Benchmark]: Witness Printer took 43.04 ms. Allocated memory is still 58.7 MB. Free memory was 28.9 MB in the beginning and 27.2 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 21:34:51,848 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 48.2 MB. Free memory was 28.1 MB in the beginning and 28.0 MB in the end (delta: 63.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 336.16 ms. Allocated memory was 48.2 MB in the beginning and 58.7 MB in the end (delta: 10.5 MB). Free memory was 24.2 MB in the beginning and 35.8 MB in the end (delta: -11.6 MB). Peak memory consumption was 5.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 41.22 ms. Allocated memory is still 58.7 MB. Free memory was 35.8 MB in the beginning and 34.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 29.17 ms. Allocated memory is still 58.7 MB. Free memory was 34.4 MB in the beginning and 33.2 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 2420.58 ms. Allocated memory is still 58.7 MB. Free memory was 33.2 MB in the beginning and 37.6 MB in the end (delta: -4.3 MB). Peak memory consumption was 10.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 84978.82 ms. Allocated memory is still 58.7 MB. Free memory was 37.1 MB in the beginning and 29.2 MB in the end (delta: 7.9 MB). Peak memory consumption was 6.7 MB. Max. memory is 16.1 GB. * Witness Printer took 43.04 ms. Allocated memory is still 58.7 MB. Free memory was 28.9 MB in the beginning and 27.2 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 12]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L20] float IN = __VERIFIER_nondet_float(); [L15] COND FALSE !(!cond) [L23] float x = IN; [L25-L26] float result = 1.0f + 0.5f*x - 0.125f*x*x + 0.0625f*x*x*x - 0.0390625f*x*x*x*x; [L28] COND TRUE !(result >= 0.0f && result < 1.398f) [L12] COND FALSE !(0) [L12] __assert_fail ("0", "square_2.c", 7, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 84.8s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 11 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=12occurred 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, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 53.8s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 14 NumberOfCodeBlocks, 14 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 12 ConstructedInterpolants, 0 QuantifiedInterpolants, 72 SizeOfPredicates, 0 NumberOfNonLiveVariables, 27 ConjunctsInSsa, 1 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 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...