./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/floats-cdfpl/square_3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8d31f386 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_3.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 df17c4a5cf1f8b8dec3dbd48ac37c795f9b13b26 ................................................................................................................................................................................................................................................................................... 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_3.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 df17c4a5cf1f8b8dec3dbd48ac37c795f9b13b26 ........................................................................................................................................................................................................................................................................................................................................................................ 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 0.2.1-wip.dd.multireach-323-8d31f38 [2021-07-04 22:50:07,386 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-04 22:50:07,388 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-04 22:50:07,415 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-07-04 22:50:07,416 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-07-04 22:50:07,419 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-07-04 22:50:07,421 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-07-04 22:50:07,429 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-07-04 22:50:07,431 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-07-04 22:50:07,434 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-07-04 22:50:07,435 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-07-04 22:50:07,437 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-07-04 22:50:07,437 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-07-04 22:50:07,439 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-07-04 22:50:07,441 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-07-04 22:50:07,442 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-07-04 22:50:07,443 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-07-04 22:50:07,443 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-07-04 22:50:07,446 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-07-04 22:50:07,451 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-07-04 22:50:07,452 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-07-04 22:50:07,453 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-07-04 22:50:07,454 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-07-04 22:50:07,455 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-07-04 22:50:07,459 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-07-04 22:50:07,459 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-07-04 22:50:07,460 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-07-04 22:50:07,461 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-07-04 22:50:07,461 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-07-04 22:50:07,462 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-07-04 22:50:07,462 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-07-04 22:50:07,462 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-07-04 22:50:07,463 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-07-04 22:50:07,464 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-07-04 22:50:07,465 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-07-04 22:50:07,465 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-07-04 22:50:07,465 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-07-04 22:50:07,465 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-07-04 22:50:07,466 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-07-04 22:50:07,467 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-07-04 22:50:07,467 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-07-04 22:50:07,468 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-07-04 22:50:07,500 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-04 22:50:07,500 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-04 22:50:07,502 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-04 22:50:07,502 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-04 22:50:07,502 INFO L138 SettingsManager]: * Use SBE=true [2021-07-04 22:50:07,503 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-04 22:50:07,503 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-04 22:50:07,503 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-04 22:50:07,503 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-04 22:50:07,504 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-04 22:50:07,504 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-04 22:50:07,505 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-04 22:50:07,505 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-04 22:50:07,505 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-04 22:50:07,505 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-04 22:50:07,505 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-04 22:50:07,505 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-04 22:50:07,506 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-04 22:50:07,506 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-04 22:50:07,506 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-04 22:50:07,506 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-04 22:50:07,506 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-04 22:50:07,507 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-04 22:50:07,507 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-04 22:50:07,507 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-04 22:50:07,507 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-04 22:50:07,507 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-04 22:50:07,507 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-07-04 22:50:07,508 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> df17c4a5cf1f8b8dec3dbd48ac37c795f9b13b26 [2021-07-04 22:50:07,760 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-04 22:50:07,781 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-04 22:50:07,783 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-04 22:50:07,784 INFO L271 PluginConnector]: Initializing CDTParser... [2021-07-04 22:50:07,784 INFO L275 PluginConnector]: CDTParser initialized [2021-07-04 22:50:07,785 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/floats-cdfpl/square_3.i [2021-07-04 22:50:07,833 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/607bc0c1d/57ff45fe755f4abe8fc20fc0cfe4a887/FLAGfb236db5b [2021-07-04 22:50:08,198 INFO L306 CDTParser]: Found 1 translation units. [2021-07-04 22:50:08,198 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/floats-cdfpl/square_3.i [2021-07-04 22:50:08,202 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/607bc0c1d/57ff45fe755f4abe8fc20fc0cfe4a887/FLAGfb236db5b [2021-07-04 22:50:08,623 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/607bc0c1d/57ff45fe755f4abe8fc20fc0cfe4a887 [2021-07-04 22:50:08,625 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-04 22:50:08,626 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-07-04 22:50:08,629 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-07-04 22:50:08,629 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-07-04 22:50:08,631 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-07-04 22:50:08,632 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.07 10:50:08" (1/1) ... [2021-07-04 22:50:08,633 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b57f7f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.07 10:50:08, skipping insertion in model container [2021-07-04 22:50:08,633 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.07 10:50:08" (1/1) ... [2021-07-04 22:50:08,637 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-07-04 22:50:08,647 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-07-04 22:50:08,725 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/floats-cdfpl/square_3.i[1131,1144] [2021-07-04 22:50:08,727 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-07-04 22:50:08,732 INFO L203 MainTranslator]: Completed pre-run [2021-07-04 22:50:08,771 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/floats-cdfpl/square_3.i[1131,1144] [2021-07-04 22:50:08,772 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-07-04 22:50:08,783 INFO L208 MainTranslator]: Completed translation [2021-07-04 22:50:08,783 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.07 10:50:08 WrapperNode [2021-07-04 22:50:08,784 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-07-04 22:50:08,784 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-04 22:50:08,785 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-04 22:50:08,786 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-04 22:50:08,790 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.07 10:50:08" (1/1) ... [2021-07-04 22:50:08,796 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.07 10:50:08" (1/1) ... [2021-07-04 22:50:08,807 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-04 22:50:08,808 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-04 22:50:08,808 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-04 22:50:08,808 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-04 22:50:08,812 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.07 10:50:08" (1/1) ... [2021-07-04 22:50:08,813 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.07 10:50:08" (1/1) ... [2021-07-04 22:50:08,819 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.07 10:50:08" (1/1) ... [2021-07-04 22:50:08,820 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.07 10:50:08" (1/1) ... [2021-07-04 22:50:08,829 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.07 10:50:08" (1/1) ... [2021-07-04 22:50:08,830 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.07 10:50:08" (1/1) ... [2021-07-04 22:50:08,831 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.07 10:50:08" (1/1) ... [2021-07-04 22:50:08,833 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-04 22:50:08,834 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-04 22:50:08,834 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-04 22:50:08,834 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-04 22:50:08,835 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.07 10:50:08" (1/1) ... [2021-07-04 22:50:08,839 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-04 22:50:08,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-07-04 22:50:08,859 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-07-04 22:50:08,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-07-04 22:50:08,896 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-07-04 22:50:08,896 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-07-04 22:50:08,897 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-04 22:50:08,897 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-04 22:50:09,051 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-04 22:50:09,052 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-07-04 22:50:09,053 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.07 10:50:09 BoogieIcfgContainer [2021-07-04 22:50:09,053 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-04 22:50:09,054 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-04 22:50:09,054 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-04 22:50:09,056 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-04 22:50:09,057 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.07 10:50:08" (1/3) ... [2021-07-04 22:50:09,057 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@287cf78a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.07 10:50:09, skipping insertion in model container [2021-07-04 22:50:09,057 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.07 10:50:08" (2/3) ... [2021-07-04 22:50:09,058 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@287cf78a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.07 10:50:09, skipping insertion in model container [2021-07-04 22:50:09,058 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.07 10:50:09" (3/3) ... [2021-07-04 22:50:09,059 INFO L111 eAbstractionObserver]: Analyzing ICFG square_3.i [2021-07-04 22:50:09,063 INFO L198 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-04 22:50:09,064 INFO L158 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-04 22:50:09,110 INFO L328 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION ======== [2021-07-04 22:50:09,117 INFO L329 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mLimitAnalysisTime=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-07-04 22:50:09,117 INFO L330 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-07-04 22:50:09,127 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-04 22:50:09,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-07-04 22:50:09,130 INFO L517 BasicCegarLoop]: Found error trace [2021-07-04 22:50:09,131 INFO L525 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-07-04 22:50:09,131 INFO L374 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-07-04 22:50:09,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-04 22:50:09,136 INFO L82 PathProgramCache]: Analyzing trace with hash 889508712, now seen corresponding path program 1 times [2021-07-04 22:50:09,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-04 22:50:09,142 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914629768] [2021-07-04 22:50:09,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-04 22:50:09,143 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-04 22:50:09,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-04 22:50:09,242 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 22:50:09,243 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 22:50:09,244 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 22:50:09,245 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 22:50:09,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-04 22:50:09,246 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-04 22:50:09,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914629768] [2021-07-04 22:50:09,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914629768] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-04 22:50:09,247 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-04 22:50:09,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-07-04 22:50:09,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287263886] [2021-07-04 22:50:09,257 INFO L425 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-07-04 22:50:09,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-04 22:50:09,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-07-04 22:50:09,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-07-04 22:50:09,267 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-04 22:50:09,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-04 22:50:09,275 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2021-07-04 22:50:09,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-07-04 22:50:09,276 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-07-04 22:50:09,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-04 22:50:09,280 INFO L225 Difference]: With dead ends: 19 [2021-07-04 22:50:09,280 INFO L226 Difference]: Without dead ends: 7 [2021-07-04 22:50:09,281 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-07-04 22:50:09,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2021-07-04 22:50:09,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2021-07-04 22:50:09,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 6 states have (on average 1.0) internal successors, (6), 6 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-04 22:50:09,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 6 transitions. [2021-07-04 22:50:09,297 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 6 transitions. Word has length 6 [2021-07-04 22:50:09,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-04 22:50:09,298 INFO L442 AbstractCegarLoop]: Abstraction has 7 states and 6 transitions. [2021-07-04 22:50:09,298 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-04 22:50:09,298 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 6 transitions. [2021-07-04 22:50:09,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-07-04 22:50:09,298 INFO L517 BasicCegarLoop]: Found error trace [2021-07-04 22:50:09,298 INFO L525 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-07-04 22:50:09,299 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-04 22:50:09,299 INFO L374 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-07-04 22:50:09,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-04 22:50:09,299 INFO L82 PathProgramCache]: Analyzing trace with hash 889568294, now seen corresponding path program 1 times [2021-07-04 22:50:09,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-04 22:50:09,299 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995765064] [2021-07-04 22:50:09,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-04 22:50:09,300 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-04 22:50:09,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-07-04 22:50:09,312 INFO L224 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-07-04 22:50:09,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-07-04 22:50:09,321 INFO L224 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-07-04 22:50:09,331 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-07-04 22:50:09,331 INFO L639 BasicCegarLoop]: Counterexample is feasible [2021-07-04 22:50:09,333 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-04 22:50:09,334 WARN L182 nStatisticsGenerator]: total relevant statements: 0 [2021-07-04 22:50:09,352 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.07 10:50:09 BoogieIcfgContainer [2021-07-04 22:50:09,352 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-04 22:50:09,353 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-07-04 22:50:09,353 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-07-04 22:50:09,353 INFO L275 PluginConnector]: Witness Printer initialized [2021-07-04 22:50:09,353 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.07 10:50:09" (3/4) ... [2021-07-04 22:50:09,355 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-07-04 22:50:09,355 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-07-04 22:50:09,356 INFO L168 Benchmark]: Toolchain (without parser) took 729.57 ms. Allocated memory was 58.7 MB in the beginning and 71.3 MB in the end (delta: 12.6 MB). Free memory was 37.2 MB in the beginning and 54.1 MB in the end (delta: -16.9 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-07-04 22:50:09,356 INFO L168 Benchmark]: CDTParser took 0.41 ms. Allocated memory is still 58.7 MB. Free memory was 39.8 MB in the beginning and 39.8 MB in the end (delta: 39.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-07-04 22:50:09,357 INFO L168 Benchmark]: CACSL2BoogieTranslator took 155.11 ms. Allocated memory is still 58.7 MB. Free memory was 37.0 MB in the beginning and 42.0 MB in the end (delta: -5.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-07-04 22:50:09,357 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.49 ms. Allocated memory is still 58.7 MB. Free memory was 42.0 MB in the beginning and 40.7 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-07-04 22:50:09,357 INFO L168 Benchmark]: Boogie Preprocessor took 25.67 ms. Allocated memory is still 58.7 MB. Free memory was 40.7 MB in the beginning and 39.7 MB in the end (delta: 934.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-07-04 22:50:09,358 INFO L168 Benchmark]: RCFGBuilder took 219.29 ms. Allocated memory is still 58.7 MB. Free memory was 39.6 MB in the beginning and 29.1 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-07-04 22:50:09,358 INFO L168 Benchmark]: TraceAbstraction took 297.98 ms. Allocated memory was 58.7 MB in the beginning and 71.3 MB in the end (delta: 12.6 MB). Free memory was 28.6 MB in the beginning and 54.4 MB in the end (delta: -25.9 MB). Peak memory consumption was 9.4 MB. Max. memory is 16.1 GB. [2021-07-04 22:50:09,358 INFO L168 Benchmark]: Witness Printer took 2.39 ms. Allocated memory is still 71.3 MB. Free memory was 54.4 MB in the beginning and 54.1 MB in the end (delta: 326.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-07-04 22:50:09,360 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.41 ms. Allocated memory is still 58.7 MB. Free memory was 39.8 MB in the beginning and 39.8 MB in the end (delta: 39.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 155.11 ms. Allocated memory is still 58.7 MB. Free memory was 37.0 MB in the beginning and 42.0 MB in the end (delta: -5.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 22.49 ms. Allocated memory is still 58.7 MB. Free memory was 42.0 MB in the beginning and 40.7 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 25.67 ms. Allocated memory is still 58.7 MB. Free memory was 40.7 MB in the beginning and 39.7 MB in the end (delta: 934.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 219.29 ms. Allocated memory is still 58.7 MB. Free memory was 39.6 MB in the beginning and 29.1 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 297.98 ms. Allocated memory was 58.7 MB in the beginning and 71.3 MB in the end (delta: 12.6 MB). Free memory was 28.6 MB in the beginning and 54.4 MB in the end (delta: -25.9 MB). Peak memory consumption was 9.4 MB. Max. memory is 16.1 GB. * Witness Printer took 2.39 ms. Allocated memory is still 71.3 MB. Free memory was 54.4 MB in the beginning and 54.1 MB in the end (delta: 326.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - 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 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 < 1.39843f) [L29] reach_error() - StatisticsResult: Ultimate Automizer benchmark data for error location: ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION CFG has 1 procedures, 11 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 227.5ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 5.7ms, AutomataDifference: 23.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 7.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 10 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=11occurred in iteration=0, InterpolantAutomatonStates: 2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 7.9ms AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 10.4ms SsaConstructionTime, 31.6ms SatisfiabilityAnalysisTime, 33.4ms InterpolantComputationTime, 12 NumberOfCodeBlocks, 12 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 5 ConstructedInterpolants, 0 QuantifiedInterpolants, 5 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 [2021-07-04 22:50:09,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-wip.dd.multireach-323-8d31f38 [2021-07-04 22:50:10,886 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2021-07-04 22:50:10,968 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-07-04 22:50:10,968 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-07-04 22:50:10,969 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-07-04 22:50:10,970 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-07-04 22:50:10,970 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-07-04 22:50:10,970 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-07-04 22:50:10,971 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-07-04 22:50:10,971 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-07-04 22:50:10,971 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-07-04 22:50:10,972 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-07-04 22:50:10,973 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-07-04 22:50:10,974 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-07-04 22:50:11,001 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-04 22:50:11,001 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-04 22:50:11,003 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-04 22:50:11,003 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-04 22:50:11,003 INFO L138 SettingsManager]: * Use SBE=true [2021-07-04 22:50:11,003 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-04 22:50:11,003 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-04 22:50:11,003 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-04 22:50:11,004 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-04 22:50:11,004 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-04 22:50:11,004 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-04 22:50:11,005 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-04 22:50:11,005 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-07-04 22:50:11,005 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-07-04 22:50:11,005 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-04 22:50:11,005 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-04 22:50:11,005 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-04 22:50:11,005 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-04 22:50:11,006 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-04 22:50:11,006 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-04 22:50:11,006 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-04 22:50:11,006 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-04 22:50:11,006 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-04 22:50:11,006 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-04 22:50:11,006 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-04 22:50:11,007 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-07-04 22:50:11,007 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-07-04 22:50:11,007 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-04 22:50:11,007 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-07-04 22:50:11,007 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-07-04 22:50:11,007 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> df17c4a5cf1f8b8dec3dbd48ac37c795f9b13b26 [2021-07-04 22:50:11,270 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-04 22:50:11,286 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-04 22:50:11,288 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-04 22:50:11,289 INFO L271 PluginConnector]: Initializing CDTParser... [2021-07-04 22:50:11,290 INFO L275 PluginConnector]: CDTParser initialized [2021-07-04 22:50:11,290 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/floats-cdfpl/square_3.i [2021-07-04 22:50:11,338 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e1ed0d753/fe40f61ee1864afdb7990b6405a953b6/FLAG4a8da05a5 [2021-07-04 22:50:11,677 INFO L306 CDTParser]: Found 1 translation units. [2021-07-04 22:50:11,677 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/floats-cdfpl/square_3.i [2021-07-04 22:50:11,681 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e1ed0d753/fe40f61ee1864afdb7990b6405a953b6/FLAG4a8da05a5 [2021-07-04 22:50:11,695 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e1ed0d753/fe40f61ee1864afdb7990b6405a953b6 [2021-07-04 22:50:11,697 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-04 22:50:11,698 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-07-04 22:50:11,700 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-07-04 22:50:11,701 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-07-04 22:50:11,703 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-07-04 22:50:11,703 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.07 10:50:11" (1/1) ... [2021-07-04 22:50:11,704 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2da10bda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.07 10:50:11, skipping insertion in model container [2021-07-04 22:50:11,704 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.07 10:50:11" (1/1) ... [2021-07-04 22:50:11,709 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-07-04 22:50:11,719 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-07-04 22:50:11,838 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/floats-cdfpl/square_3.i[1131,1144] [2021-07-04 22:50:11,843 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-07-04 22:50:11,862 INFO L203 MainTranslator]: Completed pre-run [2021-07-04 22:50:11,889 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/floats-cdfpl/square_3.i[1131,1144] [2021-07-04 22:50:11,890 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-07-04 22:50:11,905 INFO L208 MainTranslator]: Completed translation [2021-07-04 22:50:11,906 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.07 10:50:11 WrapperNode [2021-07-04 22:50:11,907 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-07-04 22:50:11,908 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-04 22:50:11,908 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-04 22:50:11,908 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-04 22:50:11,913 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.07 10:50:11" (1/1) ... [2021-07-04 22:50:11,924 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.07 10:50:11" (1/1) ... [2021-07-04 22:50:11,936 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-04 22:50:11,937 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-04 22:50:11,937 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-04 22:50:11,937 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-04 22:50:11,942 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.07 10:50:11" (1/1) ... [2021-07-04 22:50:11,942 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.07 10:50:11" (1/1) ... [2021-07-04 22:50:11,946 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.07 10:50:11" (1/1) ... [2021-07-04 22:50:11,946 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.07 10:50:11" (1/1) ... [2021-07-04 22:50:11,957 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.07 10:50:11" (1/1) ... [2021-07-04 22:50:11,958 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.07 10:50:11" (1/1) ... [2021-07-04 22:50:11,959 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.07 10:50:11" (1/1) ... [2021-07-04 22:50:11,960 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-04 22:50:11,961 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-04 22:50:11,961 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-04 22:50:11,961 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-04 22:50:11,962 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.07 10:50:11" (1/1) ... [2021-07-04 22:50:11,966 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-04 22:50:11,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-07-04 22:50:11,978 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-07-04 22:50:11,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-07-04 22:50:12,020 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-07-04 22:50:12,020 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-07-04 22:50:12,020 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-04 22:50:12,021 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-04 22:50:14,239 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-04 22:50:14,239 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-07-04 22:50:14,240 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.07 10:50:14 BoogieIcfgContainer [2021-07-04 22:50:14,240 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-04 22:50:14,241 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-04 22:50:14,241 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-04 22:50:14,243 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-04 22:50:14,243 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.07 10:50:11" (1/3) ... [2021-07-04 22:50:14,244 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40abdad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.07 10:50:14, skipping insertion in model container [2021-07-04 22:50:14,244 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.07 10:50:11" (2/3) ... [2021-07-04 22:50:14,244 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40abdad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.07 10:50:14, skipping insertion in model container [2021-07-04 22:50:14,244 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.07 10:50:14" (3/3) ... [2021-07-04 22:50:14,245 INFO L111 eAbstractionObserver]: Analyzing ICFG square_3.i [2021-07-04 22:50:14,249 INFO L198 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-04 22:50:14,249 INFO L158 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-04 22:50:14,275 INFO L328 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION ======== [2021-07-04 22:50:14,279 INFO L329 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mLimitAnalysisTime=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-07-04 22:50:14,279 INFO L330 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-07-04 22:50:14,287 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-04 22:50:14,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-07-04 22:50:14,289 INFO L517 BasicCegarLoop]: Found error trace [2021-07-04 22:50:14,290 INFO L525 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-07-04 22:50:14,290 INFO L374 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-07-04 22:50:14,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-04 22:50:14,294 INFO L82 PathProgramCache]: Analyzing trace with hash 889508712, now seen corresponding path program 1 times [2021-07-04 22:50:14,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-07-04 22:50:14,301 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1272807432] [2021-07-04 22:50:14,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-04 22:50:14,301 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-07-04 22:50:14,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-07-04 22:50:14,302 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-07-04 22:50:14,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-07-04 22:50:14,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-04 22:50:14,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 1 conjunts are in the unsatisfiable core [2021-07-04 22:50:14,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-04 22:50:14,730 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 22:50:14,731 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 22:50:14,733 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 22:50:14,733 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 22:50:14,735 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 22:50:14,735 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 22:50:14,736 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 22:50:14,736 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 22:50:14,739 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 22:50:14,739 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 22:50:14,739 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 22:50:14,740 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 22:50:14,740 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 22:50:14,741 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 22:50:14,741 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 22:50:14,741 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 22:50:14,742 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 22:50:14,742 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 22:50:14,743 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 22:50:14,744 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 22:50:14,744 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 22:50:14,744 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 22:50:14,745 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 22:50:14,745 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 22:50:14,746 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 22:50:14,746 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 22:50:14,746 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 22:50:14,747 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 22:50:14,747 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 22:50:14,747 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 22:50:14,748 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 22:50:14,748 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 22:50:14,749 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 22:50:14,749 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 22:50:14,749 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 22:50:14,750 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 22:50:14,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-04 22:50:14,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-07-04 22:50:14,752 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 22:50:14,752 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 22:50:14,753 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 22:50:14,753 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 22:50:14,754 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 22:50:14,754 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 22:50:14,754 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 22:50:14,765 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 22:50:14,765 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 22:50:14,766 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 22:50:14,766 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 22:50:14,767 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 22:50:14,767 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 22:50:14,767 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 22:50:14,768 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 22:50:14,768 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 22:50:14,769 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 22:50:14,769 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 22:50:14,769 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 22:50:14,770 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 22:50:14,770 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 22:50:14,770 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 22:50:14,771 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 22:50:14,771 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 22:50:14,771 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 22:50:14,772 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 22:50:14,772 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 22:50:14,772 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 22:50:14,773 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 22:50:14,773 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 22:50:14,773 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 22:50:14,774 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 22:50:14,781 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 22:50:14,782 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 22:50:14,782 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 22:50:14,783 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 22:50:14,784 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 22:50:14,784 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 22:50:14,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-04 22:50:14,785 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-07-04 22:50:14,785 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1272807432] [2021-07-04 22:50:14,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1272807432] provided 2 perfect and 0 imperfect interpolant sequences [2021-07-04 22:50:14,785 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-07-04 22:50:14,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-07-04 22:50:14,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511031809] [2021-07-04 22:50:14,789 INFO L425 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-07-04 22:50:14,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-07-04 22:50:14,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-07-04 22:50:14,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-07-04 22:50:14,798 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-04 22:50:14,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-04 22:50:14,805 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2021-07-04 22:50:14,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-07-04 22:50:14,806 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-07-04 22:50:14,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-04 22:50:14,810 INFO L225 Difference]: With dead ends: 19 [2021-07-04 22:50:14,810 INFO L226 Difference]: Without dead ends: 7 [2021-07-04 22:50:14,812 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-07-04 22:50:14,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2021-07-04 22:50:14,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2021-07-04 22:50:14,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 6 states have (on average 1.0) internal successors, (6), 6 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-04 22:50:14,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 6 transitions. [2021-07-04 22:50:14,828 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 6 transitions. Word has length 6 [2021-07-04 22:50:14,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-04 22:50:14,828 INFO L442 AbstractCegarLoop]: Abstraction has 7 states and 6 transitions. [2021-07-04 22:50:14,828 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-04 22:50:14,828 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 6 transitions. [2021-07-04 22:50:14,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-07-04 22:50:14,828 INFO L517 BasicCegarLoop]: Found error trace [2021-07-04 22:50:14,828 INFO L525 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-07-04 22:50:14,846 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-07-04 22:50:15,037 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-07-04 22:50:15,038 INFO L374 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-07-04 22:50:15,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-04 22:50:15,038 INFO L82 PathProgramCache]: Analyzing trace with hash 889568294, now seen corresponding path program 1 times [2021-07-04 22:50:15,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-07-04 22:50:15,041 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1550258254] [2021-07-04 22:50:15,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-04 22:50:15,041 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-07-04 22:50:15,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-07-04 22:50:15,043 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-07-04 22:50:15,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-07-04 22:50:48,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-07-04 22:50:48,114 INFO L224 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-07-04 22:52:25,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-07-04 22:52:25,281 INFO L224 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-07-04 22:52:25,367 INFO L133 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2021-07-04 22:52:25,367 INFO L639 BasicCegarLoop]: Counterexample is feasible [2021-07-04 22:52:25,401 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-07-04 22:52:25,570 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-07-04 22:52:25,570 WARN L182 nStatisticsGenerator]: total relevant statements: 0 [2021-07-04 22:52:25,587 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.07 10:52:25 BoogieIcfgContainer [2021-07-04 22:52:25,587 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-04 22:52:25,587 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-07-04 22:52:25,588 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-07-04 22:52:25,588 INFO L275 PluginConnector]: Witness Printer initialized [2021-07-04 22:52:25,588 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.07 10:50:14" (3/4) ... [2021-07-04 22:52:25,589 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-07-04 22:52:25,612 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-07-04 22:52:25,612 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-07-04 22:52:25,613 INFO L168 Benchmark]: Toolchain (without parser) took 133914.47 ms. Allocated memory was 69.2 MB in the beginning and 83.9 MB in the end (delta: 14.7 MB). Free memory was 52.0 MB in the beginning and 38.6 MB in the end (delta: 13.5 MB). Peak memory consumption was 27.5 MB. Max. memory is 16.1 GB. [2021-07-04 22:52:25,613 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 69.2 MB. Free memory was 51.7 MB in the beginning and 51.7 MB in the end (delta: 54.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-07-04 22:52:25,613 INFO L168 Benchmark]: CACSL2BoogieTranslator took 206.63 ms. Allocated memory is still 69.2 MB. Free memory was 51.9 MB in the beginning and 52.6 MB in the end (delta: -649.1 kB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-07-04 22:52:25,614 INFO L168 Benchmark]: Boogie Procedure Inliner took 28.33 ms. Allocated memory is still 69.2 MB. Free memory was 52.6 MB in the beginning and 51.0 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-07-04 22:52:25,614 INFO L168 Benchmark]: Boogie Preprocessor took 24.02 ms. Allocated memory is still 69.2 MB. Free memory was 51.0 MB in the beginning and 50.0 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-07-04 22:52:25,614 INFO L168 Benchmark]: RCFGBuilder took 2279.33 ms. Allocated memory is still 69.2 MB. Free memory was 49.7 MB in the beginning and 38.9 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-07-04 22:52:25,615 INFO L168 Benchmark]: TraceAbstraction took 131345.43 ms. Allocated memory was 69.2 MB in the beginning and 83.9 MB in the end (delta: 14.7 MB). Free memory was 38.4 MB in the beginning and 39.9 MB in the end (delta: -1.5 MB). Peak memory consumption was 16.4 MB. Max. memory is 16.1 GB. [2021-07-04 22:52:25,615 INFO L168 Benchmark]: Witness Printer took 24.62 ms. Allocated memory is still 83.9 MB. Free memory was 39.9 MB in the beginning and 38.6 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-07-04 22:52:25,617 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 69.2 MB. Free memory was 51.7 MB in the beginning and 51.7 MB in the end (delta: 54.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 206.63 ms. Allocated memory is still 69.2 MB. Free memory was 51.9 MB in the beginning and 52.6 MB in the end (delta: -649.1 kB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 28.33 ms. Allocated memory is still 69.2 MB. Free memory was 52.6 MB in the beginning and 51.0 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 24.02 ms. Allocated memory is still 69.2 MB. Free memory was 51.0 MB in the beginning and 50.0 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 2279.33 ms. Allocated memory is still 69.2 MB. Free memory was 49.7 MB in the beginning and 38.9 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 131345.43 ms. Allocated memory was 69.2 MB in the beginning and 83.9 MB in the end (delta: 14.7 MB). Free memory was 38.4 MB in the beginning and 39.9 MB in the end (delta: -1.5 MB). Peak memory consumption was 16.4 MB. Max. memory is 16.1 GB. * Witness Printer took 24.62 ms. Allocated memory is still 83.9 MB. Free memory was 39.9 MB in the beginning and 38.6 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - 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(); [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 < 1.39843f) [L29] reach_error() - StatisticsResult: Ultimate Automizer benchmark data for error location: ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION CFG has 1 procedures, 11 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 131298.8ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 4.9ms, AutomataDifference: 21.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 5.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 10 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=11occurred in iteration=0, InterpolantAutomatonStates: 2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 7.8ms AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 16.8ms SsaConstructionTime, 33386.7ms SatisfiabilityAnalysisTime, 89.8ms InterpolantComputationTime, 12 NumberOfCodeBlocks, 12 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 10 ConstructedInterpolants, 0 QuantifiedInterpolants, 10 SizeOfPredicates, 0 NumberOfNonLiveVariables, 26 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! [2021-07-04 22:52:25,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...