./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/floats-cdfpl/square_4.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 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_4.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 7a48c5cd45981ad19c66d741a4ad9a0eb2d2fb135a3f4c24edf8153a131c05f3 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 13:40:10,047 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 13:40:10,048 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 13:40:10,073 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 13:40:10,073 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 13:40:10,074 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 13:40:10,075 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 13:40:10,077 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 13:40:10,078 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 13:40:10,079 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 13:40:10,080 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 13:40:10,081 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 13:40:10,081 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 13:40:10,082 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 13:40:10,083 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 13:40:10,084 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 13:40:10,084 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 13:40:10,085 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 13:40:10,087 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 13:40:10,088 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 13:40:10,089 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 13:40:10,090 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 13:40:10,091 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 13:40:10,092 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 13:40:10,093 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 13:40:10,095 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 13:40:10,096 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 13:40:10,096 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 13:40:10,097 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 13:40:10,097 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 13:40:10,098 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 13:40:10,098 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 13:40:10,099 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 13:40:10,100 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 13:40:10,101 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 13:40:10,101 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 13:40:10,102 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 13:40:10,102 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 13:40:10,103 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 13:40:10,103 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 13:40:10,104 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 13:40:10,105 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 13:40:10,106 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 13:40:10,125 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 13:40:10,125 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 13:40:10,126 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 13:40:10,126 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 13:40:10,127 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 13:40:10,127 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 13:40:10,127 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 13:40:10,128 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 13:40:10,128 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 13:40:10,128 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 13:40:10,128 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 13:40:10,128 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 13:40:10,129 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 13:40:10,129 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 13:40:10,129 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 13:40:10,129 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 13:40:10,129 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 13:40:10,130 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 13:40:10,130 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 13:40:10,130 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 13:40:10,130 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 13:40:10,130 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 13:40:10,131 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 13:40:10,131 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 13:40:10,131 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 13:40:10,131 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 13:40:10,131 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 13:40:10,132 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 13:40:10,132 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 13:40:10,132 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 13:40:10,132 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 13:40:10,132 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 13:40:10,133 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 13:40:10,133 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7a48c5cd45981ad19c66d741a4ad9a0eb2d2fb135a3f4c24edf8153a131c05f3 [2022-07-22 13:40:10,357 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 13:40:10,374 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 13:40:10,376 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 13:40:10,378 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 13:40:10,378 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 13:40:10,380 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/floats-cdfpl/square_4.i [2022-07-22 13:40:10,431 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5aeef0c04/364c36db75ff464bb7eedf62fd5128ad/FLAGbfa26a773 [2022-07-22 13:40:10,777 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 13:40:10,777 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/floats-cdfpl/square_4.i [2022-07-22 13:40:10,788 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5aeef0c04/364c36db75ff464bb7eedf62fd5128ad/FLAGbfa26a773 [2022-07-22 13:40:11,212 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5aeef0c04/364c36db75ff464bb7eedf62fd5128ad [2022-07-22 13:40:11,216 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 13:40:11,217 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 13:40:11,218 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 13:40:11,218 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 13:40:11,221 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 13:40:11,221 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 01:40:11" (1/1) ... [2022-07-22 13:40:11,222 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@86232a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:40:11, skipping insertion in model container [2022-07-22 13:40:11,222 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 01:40:11" (1/1) ... [2022-07-22 13:40:11,227 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 13:40:11,238 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 13:40:11,401 WARN L230 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_4.i[1629,1642] [2022-07-22 13:40:11,406 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 13:40:11,412 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 13:40:11,428 WARN L230 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_4.i[1629,1642] [2022-07-22 13:40:11,428 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 13:40:11,441 INFO L208 MainTranslator]: Completed translation [2022-07-22 13:40:11,442 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:40:11 WrapperNode [2022-07-22 13:40:11,443 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 13:40:11,444 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 13:40:11,444 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 13:40:11,444 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 13:40:11,450 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:40:11" (1/1) ... [2022-07-22 13:40:11,456 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:40:11" (1/1) ... [2022-07-22 13:40:11,469 INFO L137 Inliner]: procedures = 15, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 21 [2022-07-22 13:40:11,470 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 13:40:11,471 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 13:40:11,471 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 13:40:11,472 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 13:40:11,478 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:40:11" (1/1) ... [2022-07-22 13:40:11,478 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:40:11" (1/1) ... [2022-07-22 13:40:11,480 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:40:11" (1/1) ... [2022-07-22 13:40:11,480 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:40:11" (1/1) ... [2022-07-22 13:40:11,488 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:40:11" (1/1) ... [2022-07-22 13:40:11,489 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:40:11" (1/1) ... [2022-07-22 13:40:11,491 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:40:11" (1/1) ... [2022-07-22 13:40:11,493 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 13:40:11,494 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 13:40:11,494 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 13:40:11,495 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 13:40:11,495 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:40:11" (1/1) ... [2022-07-22 13:40:11,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 13:40:11,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 13:40:11,525 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) [2022-07-22 13:40:11,552 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 [2022-07-22 13:40:11,565 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 13:40:11,566 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 13:40:11,566 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 13:40:11,566 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 13:40:11,618 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 13:40:11,619 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 13:40:11,725 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 13:40:11,729 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 13:40:11,729 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-07-22 13:40:11,730 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 01:40:11 BoogieIcfgContainer [2022-07-22 13:40:11,730 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 13:40:11,732 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 13:40:11,732 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 13:40:11,735 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 13:40:11,735 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 01:40:11" (1/3) ... [2022-07-22 13:40:11,736 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50e802c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 01:40:11, skipping insertion in model container [2022-07-22 13:40:11,736 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:40:11" (2/3) ... [2022-07-22 13:40:11,736 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50e802c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 01:40:11, skipping insertion in model container [2022-07-22 13:40:11,736 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 01:40:11" (3/3) ... [2022-07-22 13:40:11,737 INFO L111 eAbstractionObserver]: Analyzing ICFG square_4.i [2022-07-22 13:40:11,749 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 13:40:11,749 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 13:40:11,793 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 13:40:11,799 INFO L357 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, mAutomataTypeConcurrency=PETRI_NET, 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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@140df960, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@964bb2a [2022-07-22 13:40:11,799 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-22 13:40:11,802 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) [2022-07-22 13:40:11,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-22 13:40:11,807 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 13:40:11,807 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-22 13:40:11,808 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 13:40:11,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 13:40:11,812 INFO L85 PathProgramCache]: Analyzing trace with hash 889508712, now seen corresponding path program 1 times [2022-07-22 13:40:11,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 13:40:11,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598899997] [2022-07-22 13:40:11,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 13:40:11,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 13:40:11,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 13:40:11,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 13:40:11,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 13:40:11,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598899997] [2022-07-22 13:40:11,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598899997] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 13:40:11,920 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 13:40:11,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 13:40:11,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118756044] [2022-07-22 13:40:11,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 13:40:11,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 13:40:11,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 13:40:11,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 13:40:11,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 13:40:11,956 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) [2022-07-22 13:40:11,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 13:40:11,966 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2022-07-22 13:40:11,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 13:40:11,968 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 [2022-07-22 13:40:11,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 13:40:11,974 INFO L225 Difference]: With dead ends: 19 [2022-07-22 13:40:11,974 INFO L226 Difference]: Without dead ends: 7 [2022-07-22 13:40:11,977 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 13:40:11,981 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 13:40:11,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 13:40:11,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2022-07-22 13:40:12,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2022-07-22 13:40:12,003 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) [2022-07-22 13:40:12,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 6 transitions. [2022-07-22 13:40:12,005 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 6 transitions. Word has length 6 [2022-07-22 13:40:12,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 13:40:12,005 INFO L495 AbstractCegarLoop]: Abstraction has 7 states and 6 transitions. [2022-07-22 13:40:12,006 INFO L496 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) [2022-07-22 13:40:12,006 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 6 transitions. [2022-07-22 13:40:12,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-22 13:40:12,006 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 13:40:12,007 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-22 13:40:12,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 13:40:12,007 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 13:40:12,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 13:40:12,008 INFO L85 PathProgramCache]: Analyzing trace with hash 889568294, now seen corresponding path program 1 times [2022-07-22 13:40:12,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 13:40:12,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098350614] [2022-07-22 13:40:12,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 13:40:12,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 13:40:12,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 13:40:12,043 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 13:40:12,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 13:40:12,083 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 13:40:12,084 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-22 13:40:12,085 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-07-22 13:40:12,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 13:40:12,093 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1] [2022-07-22 13:40:12,095 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-22 13:40:12,118 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.07 01:40:12 BoogieIcfgContainer [2022-07-22 13:40:12,118 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-22 13:40:12,120 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-22 13:40:12,120 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-22 13:40:12,120 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-22 13:40:12,120 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 01:40:11" (3/4) ... [2022-07-22 13:40:12,123 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-07-22 13:40:12,123 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-22 13:40:12,124 INFO L158 Benchmark]: Toolchain (without parser) took 906.92ms. Allocated memory was 121.6MB in the beginning and 153.1MB in the end (delta: 31.5MB). Free memory was 94.5MB in the beginning and 91.3MB in the end (delta: 3.2MB). Peak memory consumption was 33.7MB. Max. memory is 16.1GB. [2022-07-22 13:40:12,125 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 121.6MB. Free memory is still 76.8MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-22 13:40:12,127 INFO L158 Benchmark]: CACSL2BoogieTranslator took 225.06ms. Allocated memory was 121.6MB in the beginning and 153.1MB in the end (delta: 31.5MB). Free memory was 94.5MB in the beginning and 125.8MB in the end (delta: -31.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-22 13:40:12,128 INFO L158 Benchmark]: Boogie Procedure Inliner took 26.36ms. Allocated memory is still 153.1MB. Free memory was 125.8MB in the beginning and 124.5MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-22 13:40:12,130 INFO L158 Benchmark]: Boogie Preprocessor took 21.58ms. Allocated memory is still 153.1MB. Free memory was 124.5MB in the beginning and 123.6MB in the end (delta: 836.1kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-22 13:40:12,131 INFO L158 Benchmark]: RCFGBuilder took 236.62ms. Allocated memory is still 153.1MB. Free memory was 123.2MB in the beginning and 114.8MB in the end (delta: 8.4MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-07-22 13:40:12,131 INFO L158 Benchmark]: TraceAbstraction took 387.07ms. Allocated memory is still 153.1MB. Free memory was 114.4MB in the beginning and 91.8MB in the end (delta: 22.6MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2022-07-22 13:40:12,132 INFO L158 Benchmark]: Witness Printer took 3.57ms. Allocated memory is still 153.1MB. Free memory was 91.7MB in the beginning and 91.3MB in the end (delta: 402.2kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-22 13:40:12,137 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 121.6MB. Free memory is still 76.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 225.06ms. Allocated memory was 121.6MB in the beginning and 153.1MB in the end (delta: 31.5MB). Free memory was 94.5MB in the beginning and 125.8MB in the end (delta: -31.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 26.36ms. Allocated memory is still 153.1MB. Free memory was 125.8MB in the beginning and 124.5MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 21.58ms. Allocated memory is still 153.1MB. Free memory was 124.5MB in the beginning and 123.6MB in the end (delta: 836.1kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 236.62ms. Allocated memory is still 153.1MB. Free memory was 123.2MB in the beginning and 114.8MB in the end (delta: 8.4MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * TraceAbstraction took 387.07ms. Allocated memory is still 153.1MB. Free memory was 114.4MB in the beginning and 91.8MB in the end (delta: 22.6MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * Witness Printer took 3.57ms. Allocated memory is still 153.1MB. Free memory was 91.7MB in the beginning and 91.3MB in the end (delta: 402.2kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 38]: 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 37, overapproximation of someBinaryArithmeticFLOAToperation at line 35. Possible FailurePath: [L29] float IN = __VERIFIER_nondet_float(); [L30] CALL assume_abort_if_not(IN >= 0.0f && IN < 1.0f) [L24] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1] [L30] RET assume_abort_if_not(IN >= 0.0f && IN < 1.0f) [L32] float x = IN; [L34-L35] float result = 1.0f + 0.5f*x - 0.125f*x*x + 0.0625f*x*x*x - 0.0390625f*x*x*x*x; VAL [IN=49, x=49] [L37] COND TRUE !(result >= 0.0f && result < 1.39844f) VAL [IN=49, x=49] [L38] reach_error() VAL [IN=49, x=49] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 11 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.3s, OverallIterations: 2, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 0 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 0 mSDsluCounter, 10 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 0 IncrementalHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 10 mSDtfsCounter, 0 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=11occurred in iteration=0, InterpolantAutomatonStates: 2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 12 NumberOfCodeBlocks, 12 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 5 ConstructedInterpolants, 0 QuantifiedInterpolants, 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 [2022-07-22 13:40:12,180 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... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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_4.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 7a48c5cd45981ad19c66d741a4ad9a0eb2d2fb135a3f4c24edf8153a131c05f3 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 13:40:14,034 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 13:40:14,037 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 13:40:14,075 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 13:40:14,076 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 13:40:14,077 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 13:40:14,081 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 13:40:14,083 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 13:40:14,085 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 13:40:14,089 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 13:40:14,090 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 13:40:14,094 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 13:40:14,094 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 13:40:14,096 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 13:40:14,096 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 13:40:14,099 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 13:40:14,100 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 13:40:14,101 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 13:40:14,102 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 13:40:14,107 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 13:40:14,108 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 13:40:14,109 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 13:40:14,111 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 13:40:14,112 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 13:40:14,113 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 13:40:14,131 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 13:40:14,131 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 13:40:14,131 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 13:40:14,132 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 13:40:14,133 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 13:40:14,133 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 13:40:14,134 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 13:40:14,135 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 13:40:14,136 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 13:40:14,137 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 13:40:14,138 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 13:40:14,138 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 13:40:14,138 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 13:40:14,139 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 13:40:14,139 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 13:40:14,140 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 13:40:14,141 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 13:40:14,148 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2022-07-22 13:40:14,169 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 13:40:14,170 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 13:40:14,170 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 13:40:14,170 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 13:40:14,171 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 13:40:14,171 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 13:40:14,172 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 13:40:14,172 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 13:40:14,172 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 13:40:14,173 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 13:40:14,173 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 13:40:14,173 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 13:40:14,173 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 13:40:14,174 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 13:40:14,174 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 13:40:14,174 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 13:40:14,174 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-22 13:40:14,175 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-22 13:40:14,175 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-22 13:40:14,175 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 13:40:14,175 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 13:40:14,175 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 13:40:14,176 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 13:40:14,176 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 13:40:14,176 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 13:40:14,176 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 13:40:14,176 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 13:40:14,177 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 13:40:14,177 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 13:40:14,177 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 13:40:14,177 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-22 13:40:14,178 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-22 13:40:14,178 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 13:40:14,178 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 13:40:14,178 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 13:40:14,179 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-22 13:40:14,179 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7a48c5cd45981ad19c66d741a4ad9a0eb2d2fb135a3f4c24edf8153a131c05f3 [2022-07-22 13:40:14,479 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 13:40:14,495 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 13:40:14,497 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 13:40:14,498 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 13:40:14,498 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 13:40:14,499 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/floats-cdfpl/square_4.i [2022-07-22 13:40:14,553 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f9b4be499/c674c722ac2c4921a028a50bb86fce89/FLAG074ac7b0f [2022-07-22 13:40:14,926 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 13:40:14,927 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/floats-cdfpl/square_4.i [2022-07-22 13:40:14,932 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f9b4be499/c674c722ac2c4921a028a50bb86fce89/FLAG074ac7b0f [2022-07-22 13:40:15,338 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f9b4be499/c674c722ac2c4921a028a50bb86fce89 [2022-07-22 13:40:15,340 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 13:40:15,341 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 13:40:15,342 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 13:40:15,342 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 13:40:15,345 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 13:40:15,345 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 01:40:15" (1/1) ... [2022-07-22 13:40:15,346 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c0f8b2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:40:15, skipping insertion in model container [2022-07-22 13:40:15,346 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 01:40:15" (1/1) ... [2022-07-22 13:40:15,351 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 13:40:15,361 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 13:40:15,463 WARN L230 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_4.i[1629,1642] [2022-07-22 13:40:15,465 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 13:40:15,474 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 13:40:15,486 WARN L230 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_4.i[1629,1642] [2022-07-22 13:40:15,487 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 13:40:15,517 INFO L208 MainTranslator]: Completed translation [2022-07-22 13:40:15,518 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:40:15 WrapperNode [2022-07-22 13:40:15,518 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 13:40:15,531 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 13:40:15,531 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 13:40:15,531 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 13:40:15,537 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:40:15" (1/1) ... [2022-07-22 13:40:15,543 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:40:15" (1/1) ... [2022-07-22 13:40:15,554 INFO L137 Inliner]: procedures = 16, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 22 [2022-07-22 13:40:15,554 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 13:40:15,555 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 13:40:15,555 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 13:40:15,555 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 13:40:15,562 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:40:15" (1/1) ... [2022-07-22 13:40:15,562 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:40:15" (1/1) ... [2022-07-22 13:40:15,575 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:40:15" (1/1) ... [2022-07-22 13:40:15,577 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:40:15" (1/1) ... [2022-07-22 13:40:15,581 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:40:15" (1/1) ... [2022-07-22 13:40:15,584 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:40:15" (1/1) ... [2022-07-22 13:40:15,590 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:40:15" (1/1) ... [2022-07-22 13:40:15,592 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 13:40:15,593 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 13:40:15,594 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 13:40:15,595 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 13:40:15,595 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:40:15" (1/1) ... [2022-07-22 13:40:15,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 13:40:15,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 13:40:15,621 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) [2022-07-22 13:40:15,635 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 [2022-07-22 13:40:15,650 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 13:40:15,650 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-07-22 13:40:15,650 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 13:40:15,651 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 13:40:15,699 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 13:40:15,701 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 13:40:17,876 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 13:40:17,880 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 13:40:17,880 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-07-22 13:40:17,882 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 01:40:17 BoogieIcfgContainer [2022-07-22 13:40:17,882 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 13:40:17,883 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 13:40:17,883 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 13:40:17,886 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 13:40:17,886 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 01:40:15" (1/3) ... [2022-07-22 13:40:17,887 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20edc083 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 01:40:17, skipping insertion in model container [2022-07-22 13:40:17,887 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:40:15" (2/3) ... [2022-07-22 13:40:17,887 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20edc083 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 01:40:17, skipping insertion in model container [2022-07-22 13:40:17,887 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 01:40:17" (3/3) ... [2022-07-22 13:40:17,888 INFO L111 eAbstractionObserver]: Analyzing ICFG square_4.i [2022-07-22 13:40:17,899 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 13:40:17,899 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 13:40:17,932 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 13:40:17,937 INFO L357 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, mAutomataTypeConcurrency=PETRI_NET, 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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7ab730ce, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7a40ff6b [2022-07-22 13:40:17,937 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-22 13:40:17,941 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) [2022-07-22 13:40:17,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-22 13:40:17,945 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 13:40:17,945 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-22 13:40:17,946 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 13:40:17,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 13:40:17,950 INFO L85 PathProgramCache]: Analyzing trace with hash 889508712, now seen corresponding path program 1 times [2022-07-22 13:40:17,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 13:40:17,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [862632023] [2022-07-22 13:40:17,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 13:40:17,961 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 13:40:17,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 13:40:17,964 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) [2022-07-22 13:40:17,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-22 13:40:18,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 13:40:18,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 1 conjunts are in the unsatisfiable core [2022-07-22 13:40:18,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 13:40:18,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 13:40:18,390 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 13:40:18,390 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 13:40:18,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [862632023] [2022-07-22 13:40:18,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [862632023] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 13:40:18,391 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 13:40:18,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 13:40:18,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075319957] [2022-07-22 13:40:18,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 13:40:18,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 13:40:18,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 13:40:18,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 13:40:18,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 13:40:18,428 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) [2022-07-22 13:40:18,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 13:40:18,440 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2022-07-22 13:40:18,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 13:40:18,442 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 [2022-07-22 13:40:18,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 13:40:18,448 INFO L225 Difference]: With dead ends: 19 [2022-07-22 13:40:18,448 INFO L226 Difference]: Without dead ends: 7 [2022-07-22 13:40:18,451 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 13:40:18,455 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 13:40:18,456 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 13:40:18,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2022-07-22 13:40:18,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2022-07-22 13:40:18,475 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) [2022-07-22 13:40:18,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 6 transitions. [2022-07-22 13:40:18,476 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 6 transitions. Word has length 6 [2022-07-22 13:40:18,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 13:40:18,477 INFO L495 AbstractCegarLoop]: Abstraction has 7 states and 6 transitions. [2022-07-22 13:40:18,477 INFO L496 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) [2022-07-22 13:40:18,477 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 6 transitions. [2022-07-22 13:40:18,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-22 13:40:18,477 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 13:40:18,478 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-22 13:40:18,493 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-07-22 13:40:18,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 13:40:18,680 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 13:40:18,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 13:40:18,681 INFO L85 PathProgramCache]: Analyzing trace with hash 889568294, now seen corresponding path program 1 times [2022-07-22 13:40:18,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 13:40:18,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1549429854] [2022-07-22 13:40:18,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 13:40:18,681 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 13:40:18,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 13:40:18,683 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) [2022-07-22 13:40:18,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process