./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 20ed64ec 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-dev-20ed64e [2021-08-25 23:58:15,024 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-25 23:58:15,027 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-25 23:58:15,063 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-25 23:58:15,064 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-25 23:58:15,066 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-25 23:58:15,067 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-25 23:58:15,081 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-25 23:58:15,082 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-25 23:58:15,083 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-25 23:58:15,084 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-25 23:58:15,087 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-25 23:58:15,088 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-25 23:58:15,090 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-25 23:58:15,092 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-25 23:58:15,093 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-25 23:58:15,095 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-25 23:58:15,099 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-25 23:58:15,100 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-25 23:58:15,101 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-25 23:58:15,103 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-25 23:58:15,104 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-25 23:58:15,105 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-25 23:58:15,106 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-25 23:58:15,108 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-25 23:58:15,111 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-25 23:58:15,111 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-25 23:58:15,112 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-25 23:58:15,113 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-25 23:58:15,113 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-25 23:58:15,115 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-25 23:58:15,115 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-25 23:58:15,116 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-25 23:58:15,117 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-25 23:58:15,117 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-25 23:58:15,118 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-25 23:58:15,119 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-25 23:58:15,119 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-25 23:58:15,119 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-25 23:58:15,120 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-25 23:58:15,121 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-25 23:58:15,121 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-25 23:58:15,141 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-25 23:58:15,141 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-25 23:58:15,141 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-25 23:58:15,141 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-25 23:58:15,142 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-25 23:58:15,142 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-25 23:58:15,142 INFO L138 SettingsManager]: * Use SBE=true [2021-08-25 23:58:15,143 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-25 23:58:15,143 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-25 23:58:15,143 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-25 23:58:15,143 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-25 23:58:15,143 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-25 23:58:15,143 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-25 23:58:15,143 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-25 23:58:15,144 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-25 23:58:15,144 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-25 23:58:15,144 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-25 23:58:15,144 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-25 23:58:15,144 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-25 23:58:15,145 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-25 23:58:15,145 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-25 23:58:15,146 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-25 23:58:15,146 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-25 23:58:15,146 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-25 23:58:15,146 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-25 23:58:15,146 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-25 23:58:15,147 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-25 23:58:15,147 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-25 23:58:15,147 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-25 23:58:15,147 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-25 23:58:15,147 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> df17c4a5cf1f8b8dec3dbd48ac37c795f9b13b26 [2021-08-25 23:58:15,345 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-25 23:58:15,367 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-25 23:58:15,370 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-25 23:58:15,371 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-25 23:58:15,372 INFO L275 PluginConnector]: CDTParser initialized [2021-08-25 23:58:15,373 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/floats-cdfpl/square_3.i [2021-08-25 23:58:15,420 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/31cbbd1e0/f970715030f344398b0f935aee0d2290/FLAGaea8553e4 [2021-08-25 23:58:15,786 INFO L306 CDTParser]: Found 1 translation units. [2021-08-25 23:58:15,787 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/floats-cdfpl/square_3.i [2021-08-25 23:58:15,791 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/31cbbd1e0/f970715030f344398b0f935aee0d2290/FLAGaea8553e4 [2021-08-25 23:58:16,215 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/31cbbd1e0/f970715030f344398b0f935aee0d2290 [2021-08-25 23:58:16,220 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-25 23:58:16,223 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-25 23:58:16,225 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-25 23:58:16,225 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-25 23:58:16,227 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-25 23:58:16,227 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.08 11:58:16" (1/1) ... [2021-08-25 23:58:16,228 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6fee4d64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 11:58:16, skipping insertion in model container [2021-08-25 23:58:16,228 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.08 11:58:16" (1/1) ... [2021-08-25 23:58:16,232 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-25 23:58:16,242 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-25 23:58:16,351 WARN L228 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] [2021-08-25 23:58:16,354 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-25 23:58:16,359 INFO L203 MainTranslator]: Completed pre-run [2021-08-25 23:58:16,368 WARN L228 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] [2021-08-25 23:58:16,369 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-25 23:58:16,377 INFO L208 MainTranslator]: Completed translation [2021-08-25 23:58:16,377 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 11:58:16 WrapperNode [2021-08-25 23:58:16,378 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-25 23:58:16,378 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-25 23:58:16,379 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-25 23:58:16,379 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-25 23:58:16,383 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 11:58:16" (1/1) ... [2021-08-25 23:58:16,389 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 11:58:16" (1/1) ... [2021-08-25 23:58:16,431 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-25 23:58:16,432 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-25 23:58:16,432 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-25 23:58:16,433 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-25 23:58:16,437 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 11:58:16" (1/1) ... [2021-08-25 23:58:16,437 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 11:58:16" (1/1) ... [2021-08-25 23:58:16,445 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 11:58:16" (1/1) ... [2021-08-25 23:58:16,446 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 11:58:16" (1/1) ... [2021-08-25 23:58:16,455 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 11:58:16" (1/1) ... [2021-08-25 23:58:16,457 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 11:58:16" (1/1) ... [2021-08-25 23:58:16,458 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 11:58:16" (1/1) ... [2021-08-25 23:58:16,459 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-25 23:58:16,460 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-25 23:58:16,460 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-25 23:58:16,461 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-25 23:58:16,461 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 11:58:16" (1/1) ... [2021-08-25 23:58:16,466 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-25 23:58:16,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 23:58:16,485 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) [2021-08-25 23:58:16,505 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 [2021-08-25 23:58:16,515 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-25 23:58:16,516 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-25 23:58:16,516 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-25 23:58:16,517 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-25 23:58:16,698 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-25 23:58:16,698 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-08-25 23:58:16,699 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 11:58:16 BoogieIcfgContainer [2021-08-25 23:58:16,699 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-25 23:58:16,701 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-25 23:58:16,701 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-25 23:58:16,703 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-25 23:58:16,703 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.08 11:58:16" (1/3) ... [2021-08-25 23:58:16,704 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a85f84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.08 11:58:16, skipping insertion in model container [2021-08-25 23:58:16,704 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 11:58:16" (2/3) ... [2021-08-25 23:58:16,704 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a85f84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.08 11:58:16, skipping insertion in model container [2021-08-25 23:58:16,705 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 11:58:16" (3/3) ... [2021-08-25 23:58:16,705 INFO L111 eAbstractionObserver]: Analyzing ICFG square_3.i [2021-08-25 23:58:16,709 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-25 23:58:16,710 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-25 23:58:16,745 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-25 23:58:16,752 INFO L339 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, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-25 23:58:16,753 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-25 23:58:16,763 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) [2021-08-25 23:58:16,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-08-25 23:58:16,770 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 23:58:16,771 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-08-25 23:58:16,771 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 23:58:16,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 23:58:16,775 INFO L82 PathProgramCache]: Analyzing trace with hash 889508712, now seen corresponding path program 1 times [2021-08-25 23:58:16,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 23:58:16,787 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131453653] [2021-08-25 23:58:16,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 23:58:16,788 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 23:58:16,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 23:58:16,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 23:58:16,919 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 23:58:16,920 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131453653] [2021-08-25 23:58:16,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131453653] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 23:58:16,931 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 23:58:16,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-25 23:58:16,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115163366] [2021-08-25 23:58:16,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-25 23:58:16,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 23:58:16,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-25 23:58:16,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-25 23:58:16,961 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) [2021-08-25 23:58:16,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 23:58:16,969 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2021-08-25 23:58:16,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-25 23:58:16,970 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 [2021-08-25 23:58:16,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 23:58:16,976 INFO L225 Difference]: With dead ends: 19 [2021-08-25 23:58:16,976 INFO L226 Difference]: Without dead ends: 7 [2021-08-25 23:58:16,978 INFO L781 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 [2021-08-25 23:58:16,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2021-08-25 23:58:16,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2021-08-25 23:58:16,994 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) [2021-08-25 23:58:16,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 6 transitions. [2021-08-25 23:58:16,995 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 6 transitions. Word has length 6 [2021-08-25 23:58:16,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 23:58:16,996 INFO L470 AbstractCegarLoop]: Abstraction has 7 states and 6 transitions. [2021-08-25 23:58:16,996 INFO L471 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) [2021-08-25 23:58:16,996 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 6 transitions. [2021-08-25 23:58:16,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-08-25 23:58:16,996 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 23:58:16,997 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-08-25 23:58:16,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-25 23:58:16,998 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 23:58:16,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 23:58:16,999 INFO L82 PathProgramCache]: Analyzing trace with hash 889568294, now seen corresponding path program 1 times [2021-08-25 23:58:17,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 23:58:17,000 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294335919] [2021-08-25 23:58:17,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 23:58:17,000 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 23:58:17,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-25 23:58:17,030 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-25 23:58:17,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-25 23:58:17,069 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-25 23:58:17,069 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-08-25 23:58:17,070 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-25 23:58:17,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-25 23:58:17,076 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-25 23:58:17,088 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.08 11:58:17 BoogieIcfgContainer [2021-08-25 23:58:17,089 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-25 23:58:17,089 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-25 23:58:17,089 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-25 23:58:17,090 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-25 23:58:17,090 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 11:58:16" (3/4) ... [2021-08-25 23:58:17,092 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-08-25 23:58:17,092 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-25 23:58:17,094 INFO L168 Benchmark]: Toolchain (without parser) took 869.93 ms. Allocated memory was 54.5 MB in the beginning and 67.1 MB in the end (delta: 12.6 MB). Free memory was 32.0 MB in the beginning and 38.9 MB in the end (delta: -6.9 MB). Peak memory consumption was 4.8 MB. Max. memory is 16.1 GB. [2021-08-25 23:58:17,094 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 54.5 MB. Free memory was 37.1 MB in the beginning and 37.1 MB in the end (delta: 33.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-25 23:58:17,095 INFO L168 Benchmark]: CACSL2BoogieTranslator took 153.28 ms. Allocated memory is still 54.5 MB. Free memory was 31.8 MB in the beginning and 35.8 MB in the end (delta: -4.0 MB). Peak memory consumption was 7.2 MB. Max. memory is 16.1 GB. [2021-08-25 23:58:17,096 INFO L168 Benchmark]: Boogie Procedure Inliner took 53.14 ms. Allocated memory was 54.5 MB in the beginning and 67.1 MB in the end (delta: 12.6 MB). Free memory was 35.8 MB in the beginning and 51.3 MB in the end (delta: -15.5 MB). Peak memory consumption was 4.3 MB. Max. memory is 16.1 GB. [2021-08-25 23:58:17,096 INFO L168 Benchmark]: Boogie Preprocessor took 27.32 ms. Allocated memory is still 67.1 MB. Free memory was 51.3 MB in the beginning and 50.3 MB in the end (delta: 970.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-25 23:58:17,097 INFO L168 Benchmark]: RCFGBuilder took 239.32 ms. Allocated memory is still 67.1 MB. Free memory was 50.3 MB in the beginning and 39.7 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-08-25 23:58:17,099 INFO L168 Benchmark]: TraceAbstraction took 387.80 ms. Allocated memory is still 67.1 MB. Free memory was 39.1 MB in the beginning and 39.2 MB in the end (delta: -37.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-25 23:58:17,099 INFO L168 Benchmark]: Witness Printer took 3.19 ms. Allocated memory is still 67.1 MB. Free memory was 39.2 MB in the beginning and 38.9 MB in the end (delta: 283.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-25 23:58:17,105 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 54.5 MB. Free memory was 37.1 MB in the beginning and 37.1 MB in the end (delta: 33.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 153.28 ms. Allocated memory is still 54.5 MB. Free memory was 31.8 MB in the beginning and 35.8 MB in the end (delta: -4.0 MB). Peak memory consumption was 7.2 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 53.14 ms. Allocated memory was 54.5 MB in the beginning and 67.1 MB in the end (delta: 12.6 MB). Free memory was 35.8 MB in the beginning and 51.3 MB in the end (delta: -15.5 MB). Peak memory consumption was 4.3 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 27.32 ms. Allocated memory is still 67.1 MB. Free memory was 51.3 MB in the beginning and 50.3 MB in the end (delta: 970.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 239.32 ms. Allocated memory is still 67.1 MB. Free memory was 50.3 MB in the beginning and 39.7 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 387.80 ms. Allocated memory is still 67.1 MB. Free memory was 39.1 MB in the beginning and 39.2 MB in the end (delta: -37.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 3.19 ms. Allocated memory is still 67.1 MB. Free memory was 39.2 MB in the beginning and 38.9 MB in the end (delta: 283.3 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 CFG has 1 procedures, 11 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 331.4ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 10.2ms, AutomataDifference: 41.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 7.7ms, 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: 8.4ms AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 11.3ms SsaConstructionTime, 44.4ms SatisfiabilityAnalysisTime, 61.3ms 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 [2021-08-25 23:58:17,131 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-dev-20ed64e [2021-08-25 23:58:18,585 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2021-08-25 23:58:18,659 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-25 23:58:18,660 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-25 23:58:18,661 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-25 23:58:18,661 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-25 23:58:18,662 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-25 23:58:18,662 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-25 23:58:18,663 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-25 23:58:18,663 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-25 23:58:18,663 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-25 23:58:18,664 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-25 23:58:18,665 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-25 23:58:18,668 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-08-25 23:58:18,688 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-25 23:58:18,690 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-25 23:58:18,690 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-25 23:58:18,690 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-25 23:58:18,692 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-25 23:58:18,692 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-25 23:58:18,692 INFO L138 SettingsManager]: * Use SBE=true [2021-08-25 23:58:18,692 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-25 23:58:18,692 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-25 23:58:18,693 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-25 23:58:18,693 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-25 23:58:18,693 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-25 23:58:18,693 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-25 23:58:18,694 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-25 23:58:18,694 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-08-25 23:58:18,694 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-08-25 23:58:18,694 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-25 23:58:18,694 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-25 23:58:18,694 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-25 23:58:18,694 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-25 23:58:18,695 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-25 23:58:18,695 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-25 23:58:18,695 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-25 23:58:18,695 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-25 23:58:18,695 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-25 23:58:18,695 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-25 23:58:18,695 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-25 23:58:18,696 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-08-25 23:58:18,696 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-08-25 23:58:18,696 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-25 23:58:18,696 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-25 23:58:18,696 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-08-25 23:58:18,696 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> df17c4a5cf1f8b8dec3dbd48ac37c795f9b13b26 [2021-08-25 23:58:18,933 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-25 23:58:18,952 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-25 23:58:18,954 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-25 23:58:18,955 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-25 23:58:18,957 INFO L275 PluginConnector]: CDTParser initialized [2021-08-25 23:58:18,959 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/floats-cdfpl/square_3.i [2021-08-25 23:58:19,004 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4832e3844/4e561a01303448d78cbc3af61169020c/FLAG076ae755b [2021-08-25 23:58:19,331 INFO L306 CDTParser]: Found 1 translation units. [2021-08-25 23:58:19,332 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/floats-cdfpl/square_3.i [2021-08-25 23:58:19,336 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4832e3844/4e561a01303448d78cbc3af61169020c/FLAG076ae755b [2021-08-25 23:58:19,771 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4832e3844/4e561a01303448d78cbc3af61169020c [2021-08-25 23:58:19,772 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-25 23:58:19,774 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-25 23:58:19,774 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-25 23:58:19,774 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-25 23:58:19,777 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-25 23:58:19,778 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.08 11:58:19" (1/1) ... [2021-08-25 23:58:19,778 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4279e1e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 11:58:19, skipping insertion in model container [2021-08-25 23:58:19,779 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.08 11:58:19" (1/1) ... [2021-08-25 23:58:19,785 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-25 23:58:19,794 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-25 23:58:19,875 WARN L228 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] [2021-08-25 23:58:19,877 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-25 23:58:19,893 INFO L203 MainTranslator]: Completed pre-run [2021-08-25 23:58:19,908 WARN L228 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] [2021-08-25 23:58:19,909 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-25 23:58:19,959 INFO L208 MainTranslator]: Completed translation [2021-08-25 23:58:19,960 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 11:58:19 WrapperNode [2021-08-25 23:58:19,960 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-25 23:58:19,961 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-25 23:58:19,961 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-25 23:58:19,961 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-25 23:58:19,966 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 11:58:19" (1/1) ... [2021-08-25 23:58:19,981 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 11:58:19" (1/1) ... [2021-08-25 23:58:19,993 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-25 23:58:19,994 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-25 23:58:19,994 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-25 23:58:19,995 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-25 23:58:20,000 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 11:58:19" (1/1) ... [2021-08-25 23:58:20,000 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 11:58:19" (1/1) ... [2021-08-25 23:58:20,004 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 11:58:19" (1/1) ... [2021-08-25 23:58:20,005 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 11:58:19" (1/1) ... [2021-08-25 23:58:20,018 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 11:58:19" (1/1) ... [2021-08-25 23:58:20,021 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 11:58:19" (1/1) ... [2021-08-25 23:58:20,025 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 11:58:19" (1/1) ... [2021-08-25 23:58:20,028 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-25 23:58:20,030 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-25 23:58:20,030 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-25 23:58:20,030 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-25 23:58:20,030 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 11:58:19" (1/1) ... [2021-08-25 23:58:20,035 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-25 23:58:20,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 23:58:20,058 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) [2021-08-25 23:58:20,087 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 [2021-08-25 23:58:20,101 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-08-25 23:58:20,101 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-25 23:58:20,101 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-25 23:58:20,102 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-25 23:58:22,361 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-25 23:58:22,362 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-08-25 23:58:22,363 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 11:58:22 BoogieIcfgContainer [2021-08-25 23:58:22,363 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-25 23:58:22,364 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-25 23:58:22,370 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-25 23:58:22,372 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-25 23:58:22,372 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.08 11:58:19" (1/3) ... [2021-08-25 23:58:22,373 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@490d2104 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.08 11:58:22, skipping insertion in model container [2021-08-25 23:58:22,373 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 11:58:19" (2/3) ... [2021-08-25 23:58:22,373 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@490d2104 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.08 11:58:22, skipping insertion in model container [2021-08-25 23:58:22,373 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 11:58:22" (3/3) ... [2021-08-25 23:58:22,375 INFO L111 eAbstractionObserver]: Analyzing ICFG square_3.i [2021-08-25 23:58:22,382 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-25 23:58:22,383 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-25 23:58:22,411 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-25 23:58:22,415 INFO L339 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, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-25 23:58:22,415 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-25 23:58:22,423 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) [2021-08-25 23:58:22,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-08-25 23:58:22,426 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 23:58:22,427 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-08-25 23:58:22,427 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 23:58:22,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 23:58:22,430 INFO L82 PathProgramCache]: Analyzing trace with hash 889508712, now seen corresponding path program 1 times [2021-08-25 23:58:22,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-25 23:58:22,437 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1345740293] [2021-08-25 23:58:22,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 23:58:22,438 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-25 23:58:22,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-25 23:58:22,445 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) [2021-08-25 23:58:22,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-08-25 23:58:22,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 23:58:22,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 1 conjunts are in the unsatisfiable core [2021-08-25 23:58:22,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 23:58:22,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 23:58:22,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-25 23:58:22,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 23:58:22,914 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-25 23:58:22,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1345740293] [2021-08-25 23:58:22,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1345740293] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-25 23:58:22,914 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-25 23:58:22,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-08-25 23:58:22,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497589439] [2021-08-25 23:58:22,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-25 23:58:22,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-25 23:58:22,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-25 23:58:22,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-25 23:58:22,932 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) [2021-08-25 23:58:22,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 23:58:22,939 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2021-08-25 23:58:22,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-25 23:58:22,940 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 [2021-08-25 23:58:22,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 23:58:22,944 INFO L225 Difference]: With dead ends: 19 [2021-08-25 23:58:22,944 INFO L226 Difference]: Without dead ends: 7 [2021-08-25 23:58:22,945 INFO L781 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 [2021-08-25 23:58:22,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2021-08-25 23:58:22,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2021-08-25 23:58:22,960 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) [2021-08-25 23:58:22,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 6 transitions. [2021-08-25 23:58:22,961 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 6 transitions. Word has length 6 [2021-08-25 23:58:22,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 23:58:22,962 INFO L470 AbstractCegarLoop]: Abstraction has 7 states and 6 transitions. [2021-08-25 23:58:22,962 INFO L471 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) [2021-08-25 23:58:22,962 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 6 transitions. [2021-08-25 23:58:22,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-08-25 23:58:22,962 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 23:58:22,962 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-08-25 23:58:22,983 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-08-25 23:58:23,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-25 23:58:23,177 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 23:58:23,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 23:58:23,178 INFO L82 PathProgramCache]: Analyzing trace with hash 889568294, now seen corresponding path program 1 times [2021-08-25 23:58:23,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-25 23:58:23,178 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [407431277] [2021-08-25 23:58:23,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 23:58:23,179 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-25 23:58:23,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-25 23:58:23,181 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) [2021-08-25 23:58:23,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-08-26 00:00:41,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-26 00:00:41,003 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-26 00:02:12,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-26 00:02:12,428 INFO L133 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2021-08-26 00:02:12,429 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-08-26 00:02:12,430 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 00:02:12,463 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-08-26 00:02:12,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-26 00:02:12,635 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-26 00:02:12,646 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 12:02:12 BoogieIcfgContainer [2021-08-26 00:02:12,646 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-26 00:02:12,647 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-26 00:02:12,647 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-26 00:02:12,647 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-26 00:02:12,648 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 11:58:22" (3/4) ... [2021-08-26 00:02:12,650 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-08-26 00:02:12,668 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-26 00:02:12,669 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-26 00:02:12,670 INFO L168 Benchmark]: Toolchain (without parser) took 232896.00 ms. Allocated memory was 58.7 MB in the beginning and 71.3 MB in the end (delta: 12.6 MB). Free memory was 37.5 MB in the beginning and 37.4 MB in the end (delta: 147.2 kB). Peak memory consumption was 13.2 MB. Max. memory is 16.1 GB. [2021-08-26 00:02:12,670 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 58.7 MB. Free memory was 39.6 MB in the beginning and 39.6 MB in the end (delta: 36.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 00:02:12,671 INFO L168 Benchmark]: CACSL2BoogieTranslator took 186.08 ms. Allocated memory is still 58.7 MB. Free memory was 37.3 MB in the beginning and 42.1 MB in the end (delta: -4.8 MB). Peak memory consumption was 9.7 MB. Max. memory is 16.1 GB. [2021-08-26 00:02:12,671 INFO L168 Benchmark]: Boogie Procedure Inliner took 32.56 ms. Allocated memory is still 58.7 MB. Free memory was 42.1 MB in the beginning and 40.5 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 00:02:12,672 INFO L168 Benchmark]: Boogie Preprocessor took 33.87 ms. Allocated memory is still 58.7 MB. Free memory was 40.5 MB in the beginning and 39.4 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 00:02:12,672 INFO L168 Benchmark]: RCFGBuilder took 2333.67 ms. Allocated memory is still 58.7 MB. Free memory was 39.4 MB in the beginning and 28.1 MB in the end (delta: 11.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-08-26 00:02:12,673 INFO L168 Benchmark]: TraceAbstraction took 230282.03 ms. Allocated memory was 58.7 MB in the beginning and 71.3 MB in the end (delta: 12.6 MB). Free memory was 27.8 MB in the beginning and 39.4 MB in the end (delta: -11.6 MB). Peak memory consumption was 1.3 MB. Max. memory is 16.1 GB. [2021-08-26 00:02:12,673 INFO L168 Benchmark]: Witness Printer took 22.13 ms. Allocated memory is still 71.3 MB. Free memory was 39.1 MB in the beginning and 37.4 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 00:02:12,675 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 58.7 MB. Free memory was 39.6 MB in the beginning and 39.6 MB in the end (delta: 36.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 186.08 ms. Allocated memory is still 58.7 MB. Free memory was 37.3 MB in the beginning and 42.1 MB in the end (delta: -4.8 MB). Peak memory consumption was 9.7 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 32.56 ms. Allocated memory is still 58.7 MB. Free memory was 42.1 MB in the beginning and 40.5 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 33.87 ms. Allocated memory is still 58.7 MB. Free memory was 40.5 MB in the beginning and 39.4 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 2333.67 ms. Allocated memory is still 58.7 MB. Free memory was 39.4 MB in the beginning and 28.1 MB in the end (delta: 11.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 230282.03 ms. Allocated memory was 58.7 MB in the beginning and 71.3 MB in the end (delta: 12.6 MB). Free memory was 27.8 MB in the beginning and 39.4 MB in the end (delta: -11.6 MB). Peak memory consumption was 1.3 MB. Max. memory is 16.1 GB. * Witness Printer took 22.13 ms. Allocated memory is still 71.3 MB. Free memory was 39.1 MB in the beginning and 37.4 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. 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 CFG has 1 procedures, 11 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 230224.5ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 5.4ms, AutomataDifference: 26.4ms, 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: 14.8ms SsaConstructionTime, 138108.3ms SatisfiabilityAnalysisTime, 119.6ms 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! [2021-08-26 00:02:12,736 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...