./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/floats-cdfpl/square_1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2880296f 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 ../../../trunk/examples/svcomp/floats-cdfpl/square_1.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 eb1826e8952b1eb941e064a85d9720fcb947ea7c ............................................................................................................................................................................................................................................................................. 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 ../../../trunk/examples/svcomp/floats-cdfpl/square_1.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 eb1826e8952b1eb941e064a85d9720fcb947ea7c ..................................................................................................................................................................................................................................................................................................................... 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 0.2.0-2880296 [2020-12-02 13:56:27,242 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-02 13:56:27,246 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-02 13:56:27,309 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-02 13:56:27,310 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-02 13:56:27,316 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-02 13:56:27,320 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-02 13:56:27,328 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-02 13:56:27,333 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-02 13:56:27,339 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-02 13:56:27,341 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-02 13:56:27,347 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-02 13:56:27,348 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-02 13:56:27,352 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-02 13:56:27,354 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-02 13:56:27,357 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-02 13:56:27,358 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-02 13:56:27,362 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-02 13:56:27,366 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-02 13:56:27,375 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-02 13:56:27,380 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-02 13:56:27,381 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-02 13:56:27,385 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-02 13:56:27,387 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-02 13:56:27,396 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-02 13:56:27,397 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-02 13:56:27,397 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-02 13:56:27,400 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-02 13:56:27,401 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-02 13:56:27,402 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-02 13:56:27,403 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-02 13:56:27,404 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-02 13:56:27,406 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-02 13:56:27,407 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-02 13:56:27,409 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-02 13:56:27,409 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-02 13:56:27,413 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-02 13:56:27,414 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-02 13:56:27,415 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-02 13:56:27,417 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-02 13:56:27,418 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-02 13:56:27,420 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-12-02 13:56:27,480 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-02 13:56:27,481 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-02 13:56:27,485 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-02 13:56:27,486 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-02 13:56:27,487 INFO L138 SettingsManager]: * Use SBE=true [2020-12-02 13:56:27,487 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-02 13:56:27,488 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-02 13:56:27,488 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-02 13:56:27,488 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-02 13:56:27,489 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-02 13:56:27,490 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-02 13:56:27,491 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-02 13:56:27,491 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-02 13:56:27,492 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-02 13:56:27,492 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-02 13:56:27,492 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-02 13:56:27,493 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-02 13:56:27,493 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-02 13:56:27,494 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-02 13:56:27,494 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-12-02 13:56:27,495 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-02 13:56:27,495 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-02 13:56:27,495 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-02 13:56:27,496 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-02 13:56:27,496 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-02 13:56:27,496 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-02 13:56:27,497 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-02 13:56:27,497 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-02 13:56:27,497 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-02 13:56:27,498 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> eb1826e8952b1eb941e064a85d9720fcb947ea7c [2020-12-02 13:56:27,964 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-02 13:56:28,003 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-02 13:56:28,008 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-02 13:56:28,010 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-02 13:56:28,012 INFO L275 PluginConnector]: CDTParser initialized [2020-12-02 13:56:28,013 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/floats-cdfpl/square_1.i [2020-12-02 13:56:28,111 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/402627f1a/8d73d0e00e4a4090aaa7b81093791294/FLAG4ea92521d [2020-12-02 13:56:28,745 INFO L306 CDTParser]: Found 1 translation units. [2020-12-02 13:56:28,746 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/floats-cdfpl/square_1.i [2020-12-02 13:56:28,753 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/402627f1a/8d73d0e00e4a4090aaa7b81093791294/FLAG4ea92521d [2020-12-02 13:56:29,140 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/402627f1a/8d73d0e00e4a4090aaa7b81093791294 [2020-12-02 13:56:29,145 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-02 13:56:29,148 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-02 13:56:29,152 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-02 13:56:29,153 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-02 13:56:29,158 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-02 13:56:29,159 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 01:56:29" (1/1) ... [2020-12-02 13:56:29,163 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c30b157 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:56:29, skipping insertion in model container [2020-12-02 13:56:29,164 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 01:56:29" (1/1) ... [2020-12-02 13:56:29,173 INFO L146 MainTranslator]: Starting translation in SV-COMP mode [2020-12-02 13:56:29,193 INFO L179 MainTranslator]: Built tables and reachable declarations [2020-12-02 13:56:29,422 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/floats-cdfpl/square_1.i[1128,1141] [2020-12-02 13:56:29,427 INFO L211 PostProcessor]: Analyzing one entry point: main [2020-12-02 13:56:29,438 INFO L212 MainTranslator]: Completed pre-run [2020-12-02 13:56:29,457 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/floats-cdfpl/square_1.i[1128,1141] [2020-12-02 13:56:29,458 INFO L211 PostProcessor]: Analyzing one entry point: main [2020-12-02 13:56:29,476 INFO L217 MainTranslator]: Completed translation [2020-12-02 13:56:29,476 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:56:29 WrapperNode [2020-12-02 13:56:29,477 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-02 13:56:29,478 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-02 13:56:29,478 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-02 13:56:29,479 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-02 13:56:29,487 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:56:29" (1/1) ... [2020-12-02 13:56:29,495 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:56:29" (1/1) ... [2020-12-02 13:56:29,515 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-02 13:56:29,516 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-02 13:56:29,517 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-02 13:56:29,517 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-02 13:56:29,526 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:56:29" (1/1) ... [2020-12-02 13:56:29,527 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:56:29" (1/1) ... [2020-12-02 13:56:29,529 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:56:29" (1/1) ... [2020-12-02 13:56:29,529 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:56:29" (1/1) ... [2020-12-02 13:56:29,534 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:56:29" (1/1) ... [2020-12-02 13:56:29,537 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:56:29" (1/1) ... [2020-12-02 13:56:29,538 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:56:29" (1/1) ... [2020-12-02 13:56:29,540 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-02 13:56:29,541 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-02 13:56:29,542 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-02 13:56:29,542 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-02 13:56:29,543 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:56:29" (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 [2020-12-02 13:56:29,652 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-02 13:56:29,652 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-02 13:56:29,652 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-02 13:56:29,653 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-02 13:56:29,872 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-02 13:56:29,873 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-12-02 13:56:29,874 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:56:29 BoogieIcfgContainer [2020-12-02 13:56:29,874 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-02 13:56:29,877 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-02 13:56:29,877 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-02 13:56:29,881 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-02 13:56:29,881 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 01:56:29" (1/3) ... [2020-12-02 13:56:29,882 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2df61155 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 01:56:29, skipping insertion in model container [2020-12-02 13:56:29,882 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:56:29" (2/3) ... [2020-12-02 13:56:29,883 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2df61155 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 01:56:29, skipping insertion in model container [2020-12-02 13:56:29,883 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:56:29" (3/3) ... [2020-12-02 13:56:29,885 INFO L111 eAbstractionObserver]: Analyzing ICFG square_1.i [2020-12-02 13:56:29,903 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-02 13:56:29,907 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-02 13:56:29,922 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-02 13:56:29,952 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-02 13:56:29,952 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-02 13:56:29,953 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-02 13:56:29,953 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-02 13:56:29,953 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-02 13:56:29,953 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-02 13:56:29,953 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-02 13:56:29,953 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-02 13:56:29,985 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2020-12-02 13:56:30,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-02 13:56:30,005 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 13:56:30,007 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-02 13:56:30,009 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 13:56:30,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 13:56:30,029 INFO L82 PathProgramCache]: Analyzing trace with hash 889508712, now seen corresponding path program 1 times [2020-12-02 13:56:30,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 13:56:30,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805073142] [2020-12-02 13:56:30,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 13:56:30,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 13:56:30,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 13:56:30,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805073142] [2020-12-02 13:56:30,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-02 13:56:30,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-02 13:56:30,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393521898] [2020-12-02 13:56:30,232 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-02 13:56:30,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 13:56:30,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-02 13:56:30,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-02 13:56:30,252 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 2 states. [2020-12-02 13:56:30,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 13:56:30,269 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2020-12-02 13:56:30,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-02 13:56:30,271 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-12-02 13:56:30,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 13:56:30,281 INFO L225 Difference]: With dead ends: 19 [2020-12-02 13:56:30,281 INFO L226 Difference]: Without dead ends: 7 [2020-12-02 13:56:30,285 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 [2020-12-02 13:56:30,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2020-12-02 13:56:30,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2020-12-02 13:56:30,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-12-02 13:56:30,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 6 transitions. [2020-12-02 13:56:30,318 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 6 transitions. Word has length 6 [2020-12-02 13:56:30,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 13:56:30,318 INFO L481 AbstractCegarLoop]: Abstraction has 7 states and 6 transitions. [2020-12-02 13:56:30,319 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-02 13:56:30,319 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 6 transitions. [2020-12-02 13:56:30,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-02 13:56:30,320 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 13:56:30,320 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-02 13:56:30,320 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-02 13:56:30,321 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 13:56:30,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 13:56:30,322 INFO L82 PathProgramCache]: Analyzing trace with hash 889568294, now seen corresponding path program 1 times [2020-12-02 13:56:30,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 13:56:30,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300103108] [2020-12-02 13:56:30,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 13:56:30,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-02 13:56:30,347 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-02 13:56:30,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-02 13:56:30,372 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-02 13:56:30,395 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-02 13:56:30,396 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-02 13:56:30,397 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-02 13:56:30,420 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.12 01:56:30 BoogieIcfgContainer [2020-12-02 13:56:30,421 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-02 13:56:30,421 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-02 13:56:30,422 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-02 13:56:30,422 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-02 13:56:30,422 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:56:29" (3/4) ... [2020-12-02 13:56:30,427 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-02 13:56:30,427 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-02 13:56:30,430 INFO L168 Benchmark]: Toolchain (without parser) took 1281.20 ms. Allocated memory is still 50.3 MB. Free memory was 27.7 MB in the beginning and 21.5 MB in the end (delta: 6.1 MB). Peak memory consumption was 7.6 MB. Max. memory is 16.1 GB. [2020-12-02 13:56:30,431 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 41.9 MB. Free memory is still 21.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-02 13:56:30,432 INFO L168 Benchmark]: CACSL2BoogieTranslator took 324.67 ms. Allocated memory is still 50.3 MB. Free memory was 27.5 MB in the beginning and 28.9 MB in the end (delta: -1.5 MB). Peak memory consumption was 5.5 MB. Max. memory is 16.1 GB. [2020-12-02 13:56:30,433 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.51 ms. Allocated memory is still 50.3 MB. Free memory was 28.9 MB in the beginning and 27.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-02 13:56:30,434 INFO L168 Benchmark]: Boogie Preprocessor took 24.16 ms. Allocated memory is still 50.3 MB. Free memory was 27.6 MB in the beginning and 26.5 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-02 13:56:30,435 INFO L168 Benchmark]: RCFGBuilder took 333.09 ms. Allocated memory is still 50.3 MB. Free memory was 26.5 MB in the beginning and 29.6 MB in the end (delta: -3.1 MB). Peak memory consumption was 9.8 MB. Max. memory is 16.1 GB. [2020-12-02 13:56:30,436 INFO L168 Benchmark]: TraceAbstraction took 543.84 ms. Allocated memory is still 50.3 MB. Free memory was 29.1 MB in the beginning and 21.9 MB in the end (delta: 7.2 MB). Peak memory consumption was 7.0 MB. Max. memory is 16.1 GB. [2020-12-02 13:56:30,437 INFO L168 Benchmark]: Witness Printer took 5.91 ms. Allocated memory is still 50.3 MB. Free memory was 21.9 MB in the beginning and 21.5 MB in the end (delta: 378.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-02 13:56:30,447 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 41.9 MB. Free memory is still 21.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 324.67 ms. Allocated memory is still 50.3 MB. Free memory was 27.5 MB in the beginning and 28.9 MB in the end (delta: -1.5 MB). Peak memory consumption was 5.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 37.51 ms. Allocated memory is still 50.3 MB. Free memory was 28.9 MB in the beginning and 27.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 24.16 ms. Allocated memory is still 50.3 MB. Free memory was 27.6 MB in the beginning and 26.5 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 333.09 ms. Allocated memory is still 50.3 MB. Free memory was 26.5 MB in the beginning and 29.6 MB in the end (delta: -3.1 MB). Peak memory consumption was 9.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 543.84 ms. Allocated memory is still 50.3 MB. Free memory was 29.1 MB in the beginning and 21.9 MB in the end (delta: 7.2 MB). Peak memory consumption was 7.0 MB. Max. memory is 16.1 GB. * Witness Printer took 5.91 ms. Allocated memory is still 50.3 MB. Free memory was 21.9 MB in the beginning and 21.5 MB in the end (delta: 378.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 29]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryArithmeticFLOAT_SMToperation at line 26, overapproximation of someBinaryFLOAT_SMTComparisonOperation at line 28. 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 < 1.39f) [L29] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 11 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: 10 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=11occurred 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, 12 NumberOfCodeBlocks, 12 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 5 ConstructedInterpolants, 0 QuantifiedInterpolants, 25 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 0.2.0-2880296 [2020-12-02 13:56:33,018 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-02 13:56:33,023 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-02 13:56:33,087 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-02 13:56:33,088 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-02 13:56:33,093 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-02 13:56:33,096 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-02 13:56:33,104 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-02 13:56:33,109 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-02 13:56:33,115 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-02 13:56:33,117 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-02 13:56:33,122 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-02 13:56:33,123 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-02 13:56:33,127 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-02 13:56:33,129 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-02 13:56:33,131 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-02 13:56:33,132 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-02 13:56:33,136 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-02 13:56:33,139 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-02 13:56:33,148 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-02 13:56:33,150 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-02 13:56:33,153 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-02 13:56:33,155 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-02 13:56:33,157 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-02 13:56:33,167 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-02 13:56:33,167 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-02 13:56:33,168 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-02 13:56:33,171 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-02 13:56:33,172 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-02 13:56:33,173 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-02 13:56:33,173 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-02 13:56:33,174 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-02 13:56:33,177 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-02 13:56:33,178 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-02 13:56:33,179 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-02 13:56:33,180 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-02 13:56:33,181 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-02 13:56:33,181 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-02 13:56:33,181 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-02 13:56:33,184 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-02 13:56:33,185 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-02 13:56:33,186 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2020-12-02 13:56:33,241 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-02 13:56:33,241 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-02 13:56:33,245 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-02 13:56:33,245 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-02 13:56:33,246 INFO L138 SettingsManager]: * Use SBE=true [2020-12-02 13:56:33,246 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-02 13:56:33,246 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-02 13:56:33,247 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-02 13:56:33,247 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-02 13:56:33,247 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-02 13:56:33,249 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-02 13:56:33,249 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-02 13:56:33,249 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-12-02 13:56:33,250 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-12-02 13:56:33,250 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-02 13:56:33,250 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-02 13:56:33,250 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-02 13:56:33,251 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-02 13:56:33,251 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-02 13:56:33,252 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-02 13:56:33,252 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-12-02 13:56:33,252 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-02 13:56:33,253 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-02 13:56:33,253 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-02 13:56:33,253 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-02 13:56:33,253 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-02 13:56:33,254 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2020-12-02 13:56:33,254 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-12-02 13:56:33,255 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-02 13:56:33,255 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-02 13:56:33,255 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-02 13:56:33,256 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> eb1826e8952b1eb941e064a85d9720fcb947ea7c [2020-12-02 13:56:33,746 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-02 13:56:33,777 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-02 13:56:33,781 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-02 13:56:33,783 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-02 13:56:33,784 INFO L275 PluginConnector]: CDTParser initialized [2020-12-02 13:56:33,785 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/floats-cdfpl/square_1.i [2020-12-02 13:56:33,869 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b7a36de1/f951b7b6ee70443b9346f04e121b7ffd/FLAGb0627621d [2020-12-02 13:56:34,441 INFO L306 CDTParser]: Found 1 translation units. [2020-12-02 13:56:34,442 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/floats-cdfpl/square_1.i [2020-12-02 13:56:34,451 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b7a36de1/f951b7b6ee70443b9346f04e121b7ffd/FLAGb0627621d [2020-12-02 13:56:34,842 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b7a36de1/f951b7b6ee70443b9346f04e121b7ffd [2020-12-02 13:56:34,847 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-02 13:56:34,852 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-02 13:56:34,858 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-02 13:56:34,859 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-02 13:56:34,863 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-02 13:56:34,866 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 01:56:34" (1/1) ... [2020-12-02 13:56:34,871 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@204c0596 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:56:34, skipping insertion in model container [2020-12-02 13:56:34,872 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 01:56:34" (1/1) ... [2020-12-02 13:56:34,882 INFO L146 MainTranslator]: Starting translation in SV-COMP mode [2020-12-02 13:56:34,906 INFO L179 MainTranslator]: Built tables and reachable declarations [2020-12-02 13:56:35,165 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/floats-cdfpl/square_1.i[1128,1141] [2020-12-02 13:56:35,180 INFO L211 PostProcessor]: Analyzing one entry point: main [2020-12-02 13:56:35,211 INFO L212 MainTranslator]: Completed pre-run [2020-12-02 13:56:35,254 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/floats-cdfpl/square_1.i[1128,1141] [2020-12-02 13:56:35,256 INFO L211 PostProcessor]: Analyzing one entry point: main [2020-12-02 13:56:35,293 INFO L217 MainTranslator]: Completed translation [2020-12-02 13:56:35,296 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:56:35 WrapperNode [2020-12-02 13:56:35,296 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-02 13:56:35,299 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-02 13:56:35,299 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-02 13:56:35,299 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-02 13:56:35,309 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:56:35" (1/1) ... [2020-12-02 13:56:35,330 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:56:35" (1/1) ... [2020-12-02 13:56:35,363 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-02 13:56:35,364 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-02 13:56:35,364 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-02 13:56:35,365 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-02 13:56:35,376 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:56:35" (1/1) ... [2020-12-02 13:56:35,376 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:56:35" (1/1) ... [2020-12-02 13:56:35,381 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:56:35" (1/1) ... [2020-12-02 13:56:35,382 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:56:35" (1/1) ... [2020-12-02 13:56:35,390 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:56:35" (1/1) ... [2020-12-02 13:56:35,393 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:56:35" (1/1) ... [2020-12-02 13:56:35,396 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:56:35" (1/1) ... [2020-12-02 13:56:35,400 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-02 13:56:35,401 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-02 13:56:35,402 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-02 13:56:35,402 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-02 13:56:35,403 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:56:35" (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 [2020-12-02 13:56:35,518 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-12-02 13:56:35,519 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-02 13:56:35,519 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-02 13:56:35,519 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-02 13:56:35,519 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.float_to_bitvec_FLOAT [2020-12-02 13:56:38,087 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-02 13:56:38,088 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-12-02 13:56:38,090 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:56:38 BoogieIcfgContainer [2020-12-02 13:56:38,090 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-02 13:56:38,092 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-02 13:56:38,093 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-02 13:56:38,097 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-02 13:56:38,097 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 01:56:34" (1/3) ... [2020-12-02 13:56:38,098 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cf33ad5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 01:56:38, skipping insertion in model container [2020-12-02 13:56:38,099 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:56:35" (2/3) ... [2020-12-02 13:56:38,099 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cf33ad5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 01:56:38, skipping insertion in model container [2020-12-02 13:56:38,099 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:56:38" (3/3) ... [2020-12-02 13:56:38,101 INFO L111 eAbstractionObserver]: Analyzing ICFG square_1.i [2020-12-02 13:56:38,131 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-02 13:56:38,140 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-02 13:56:38,174 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-02 13:56:38,220 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-02 13:56:38,220 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-02 13:56:38,221 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-02 13:56:38,221 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-02 13:56:38,221 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-02 13:56:38,221 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-02 13:56:38,222 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-02 13:56:38,222 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-02 13:56:38,241 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states. [2020-12-02 13:56:38,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-02 13:56:38,248 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 13:56:38,249 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-02 13:56:38,249 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 13:56:38,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 13:56:38,258 INFO L82 PathProgramCache]: Analyzing trace with hash -594068695, now seen corresponding path program 1 times [2020-12-02 13:56:38,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-02 13:56:38,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1469280888] [2020-12-02 13:56:38,281 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 [2020-12-02 13:56:39,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 13:56:39,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 1 conjunts are in the unsatisfiable core [2020-12-02 13:56:39,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 13:56:39,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 13:56:39,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-02 13:56:39,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 13:56:39,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1469280888] [2020-12-02 13:56:39,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-12-02 13:56:39,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-12-02 13:56:39,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049948678] [2020-12-02 13:56:39,404 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-02 13:56:39,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-12-02 13:56:39,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-02 13:56:39,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-02 13:56:39,424 INFO L87 Difference]: Start difference. First operand 14 states. Second operand 2 states. [2020-12-02 13:56:39,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 13:56:39,441 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2020-12-02 13:56:39,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-02 13:56:39,443 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2020-12-02 13:56:39,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 13:56:39,452 INFO L225 Difference]: With dead ends: 23 [2020-12-02 13:56:39,453 INFO L226 Difference]: Without dead ends: 10 [2020-12-02 13:56:39,460 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-02 13:56:39,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2020-12-02 13:56:39,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2020-12-02 13:56:39,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-12-02 13:56:39,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2020-12-02 13:56:39,502 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 9 [2020-12-02 13:56:39,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 13:56:39,504 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2020-12-02 13:56:39,505 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-02 13:56:39,505 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2020-12-02 13:56:39,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-02 13:56:39,507 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 13:56:39,507 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-02 13:56:39,722 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-12-02 13:56:39,723 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 13:56:39,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 13:56:39,726 INFO L82 PathProgramCache]: Analyzing trace with hash -592221653, now seen corresponding path program 1 times [2020-12-02 13:56:39,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-02 13:56:39,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1919933315] [2020-12-02 13:56:39,730 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 [2020-12-02 14:01:31,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-02 14:01:31,648 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-02 14:01:41,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-02 14:01:41,229 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-02 14:01:41,341 INFO L173 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2020-12-02 14:01:41,342 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-02 14:01:41,543 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-12-02 14:01:41,573 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.12 02:01:41 BoogieIcfgContainer [2020-12-02 14:01:41,574 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-02 14:01:41,575 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-02 14:01:41,575 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-02 14:01:41,575 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-02 14:01:41,576 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:56:38" (3/4) ... [2020-12-02 14:01:41,578 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-02 14:01:41,625 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-12-02 14:01:41,625 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-02 14:01:41,628 INFO L168 Benchmark]: Toolchain (without parser) took 306776.35 ms. Allocated memory was 54.5 MB in the beginning and 69.2 MB in the end (delta: 14.7 MB). Free memory was 31.3 MB in the beginning and 38.3 MB in the end (delta: -6.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-02 14:01:41,629 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 54.5 MB. Free memory was 36.1 MB in the beginning and 36.0 MB in the end (delta: 63.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-02 14:01:41,630 INFO L168 Benchmark]: CACSL2BoogieTranslator took 439.33 ms. Allocated memory is still 54.5 MB. Free memory was 31.2 MB in the beginning and 33.6 MB in the end (delta: -2.3 MB). Peak memory consumption was 9.6 MB. Max. memory is 16.1 GB. [2020-12-02 14:01:41,631 INFO L168 Benchmark]: Boogie Procedure Inliner took 64.86 ms. Allocated memory is still 54.5 MB. Free memory was 33.6 MB in the beginning and 31.8 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-02 14:01:41,632 INFO L168 Benchmark]: Boogie Preprocessor took 36.22 ms. Allocated memory is still 54.5 MB. Free memory was 31.8 MB in the beginning and 30.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-02 14:01:41,633 INFO L168 Benchmark]: RCFGBuilder took 2689.03 ms. Allocated memory was 54.5 MB in the beginning and 69.2 MB in the end (delta: 14.7 MB). Free memory was 30.4 MB in the beginning and 39.7 MB in the end (delta: -9.3 MB). Peak memory consumption was 8.1 MB. Max. memory is 16.1 GB. [2020-12-02 14:01:41,634 INFO L168 Benchmark]: TraceAbstraction took 303481.42 ms. Allocated memory is still 69.2 MB. Free memory was 39.2 MB in the beginning and 39.9 MB in the end (delta: -718.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-02 14:01:41,635 INFO L168 Benchmark]: Witness Printer took 50.75 ms. Allocated memory is still 69.2 MB. Free memory was 39.9 MB in the beginning and 38.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-02 14:01:41,640 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 54.5 MB. Free memory was 36.1 MB in the beginning and 36.0 MB in the end (delta: 63.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 439.33 ms. Allocated memory is still 54.5 MB. Free memory was 31.2 MB in the beginning and 33.6 MB in the end (delta: -2.3 MB). Peak memory consumption was 9.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 64.86 ms. Allocated memory is still 54.5 MB. Free memory was 33.6 MB in the beginning and 31.8 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 36.22 ms. Allocated memory is still 54.5 MB. Free memory was 31.8 MB in the beginning and 30.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 2689.03 ms. Allocated memory was 54.5 MB in the beginning and 69.2 MB in the end (delta: 14.7 MB). Free memory was 30.4 MB in the beginning and 39.7 MB in the end (delta: -9.3 MB). Peak memory consumption was 8.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 303481.42 ms. Allocated memory is still 69.2 MB. Free memory was 39.2 MB in the beginning and 39.9 MB in the end (delta: -718.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 50.75 ms. Allocated memory is still 69.2 MB. Free memory was 39.9 MB in the beginning and 38.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 29]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L20] float IN = __VERIFIER_nondet_float(); [L21] EXPR 0.0f [L21] IN >= 0.0f && IN < 1.0f [L21] EXPR 1.0f [L21] IN >= 0.0f && IN < 1.0f [L15] COND FALSE !(!cond) [L23] float x = IN; [L26] EXPR 1.0f [L26] EXPR 0.5f [L26] EXPR 0.5f*x [L26] EXPR 1.0f + 0.5f*x [L26] EXPR 0.125f [L26] EXPR 0.125f*x [L26] EXPR 0.125f*x*x [L26] EXPR 1.0f + 0.5f*x - 0.125f*x*x [L26] EXPR 0.0625f [L26] EXPR 0.0625f*x [L26] EXPR 0.0625f*x*x [L26] EXPR 0.0625f*x*x*x [L26] EXPR 1.0f + 0.5f*x - 0.125f*x*x + 0.0625f*x*x*x [L26] EXPR 0.0390625f [L26] EXPR 0.0390625f*x [L26] EXPR 0.0390625f*x*x [L26] EXPR 0.0390625f*x*x*x [L26] EXPR 0.0390625f*x*x*x*x [L26] EXPR 1.0f + 0.5f*x - 0.125f*x*x + 0.0625f*x*x*x - 0.0390625f*x*x*x*x [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] EXPR 0.0f [L28] EXPR result >= 0.0f && result < 1.39f [L28] EXPR 1.39f [L28] EXPR result >= 0.0f && result < 1.39f [L28] COND TRUE !(result >= 0.0f && result < 1.39f) [L29] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 14 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 303.3s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 15 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=14occurred 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, 292.6s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 18 NumberOfCodeBlocks, 18 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 16 ConstructedInterpolants, 0 QuantifiedInterpolants, 128 SizeOfPredicates, 0 NumberOfNonLiveVariables, 54 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...