./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/floats-cdfpl/square_6.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c 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_6.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 4ac72755bf7b6cf6783fc81d967700fe96c3125d200b2cb393ef40778dc8a8fd --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 02:19:20,136 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 02:19:20,138 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 02:19:20,182 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 02:19:20,182 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 02:19:20,184 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 02:19:20,185 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 02:19:20,190 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 02:19:20,192 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 02:19:20,196 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 02:19:20,197 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 02:19:20,199 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 02:19:20,199 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 02:19:20,201 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 02:19:20,203 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 02:19:20,205 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 02:19:20,206 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 02:19:20,208 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 02:19:20,209 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 02:19:20,214 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 02:19:20,216 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 02:19:20,217 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 02:19:20,218 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 02:19:20,219 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 02:19:20,220 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 02:19:20,227 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 02:19:20,227 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 02:19:20,228 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 02:19:20,229 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 02:19:20,230 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 02:19:20,231 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 02:19:20,231 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 02:19:20,232 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 02:19:20,233 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 02:19:20,234 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 02:19:20,234 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 02:19:20,235 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 02:19:20,235 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 02:19:20,236 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 02:19:20,237 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 02:19:20,238 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 02:19:20,239 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 02:19:20,240 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-12 02:19:20,281 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 02:19:20,281 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 02:19:20,282 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 02:19:20,282 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 02:19:20,283 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 02:19:20,283 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 02:19:20,283 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 02:19:20,284 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 02:19:20,284 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 02:19:20,285 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 02:19:20,285 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 02:19:20,285 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 02:19:20,285 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 02:19:20,285 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 02:19:20,286 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-12 02:19:20,286 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 02:19:20,286 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-12 02:19:20,286 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 02:19:20,286 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-12 02:19:20,287 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 02:19:20,287 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-12 02:19:20,287 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 02:19:20,287 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 02:19:20,287 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 02:19:20,288 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 02:19:20,288 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 02:19:20,288 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 02:19:20,288 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-12 02:19:20,288 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 02:19:20,289 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 02:19:20,289 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-12 02:19:20,289 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-12 02:19:20,289 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-12 02:19:20,289 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ac72755bf7b6cf6783fc81d967700fe96c3125d200b2cb393ef40778dc8a8fd [2022-07-12 02:19:20,540 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 02:19:20,557 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 02:19:20,559 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 02:19:20,560 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 02:19:20,561 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 02:19:20,562 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/floats-cdfpl/square_6.i [2022-07-12 02:19:20,616 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a02322fdb/c0388966c22c410381c4a8d7c78d770e/FLAGc3108348d [2022-07-12 02:19:21,039 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 02:19:21,040 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/floats-cdfpl/square_6.i [2022-07-12 02:19:21,045 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a02322fdb/c0388966c22c410381c4a8d7c78d770e/FLAGc3108348d [2022-07-12 02:19:21,060 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a02322fdb/c0388966c22c410381c4a8d7c78d770e [2022-07-12 02:19:21,062 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 02:19:21,064 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 02:19:21,067 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 02:19:21,067 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 02:19:21,070 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 02:19:21,070 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 02:19:21" (1/1) ... [2022-07-12 02:19:21,071 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62652ed6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 02:19:21, skipping insertion in model container [2022-07-12 02:19:21,071 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 02:19:21" (1/1) ... [2022-07-12 02:19:21,078 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 02:19:21,091 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 02:19:21,285 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_6.i[1627,1640] [2022-07-12 02:19:21,289 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 02:19:21,296 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 02:19:21,312 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_6.i[1627,1640] [2022-07-12 02:19:21,313 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 02:19:21,326 INFO L208 MainTranslator]: Completed translation [2022-07-12 02:19:21,326 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 02:19:21 WrapperNode [2022-07-12 02:19:21,327 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 02:19:21,328 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 02:19:21,328 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 02:19:21,328 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 02:19:21,334 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 02:19:21" (1/1) ... [2022-07-12 02:19:21,342 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 02:19:21" (1/1) ... [2022-07-12 02:19:21,356 INFO L137 Inliner]: procedures = 15, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 21 [2022-07-12 02:19:21,357 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 02:19:21,358 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 02:19:21,358 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 02:19:21,358 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 02:19:21,364 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 02:19:21" (1/1) ... [2022-07-12 02:19:21,365 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 02:19:21" (1/1) ... [2022-07-12 02:19:21,366 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 02:19:21" (1/1) ... [2022-07-12 02:19:21,367 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 02:19:21" (1/1) ... [2022-07-12 02:19:21,374 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 02:19:21" (1/1) ... [2022-07-12 02:19:21,376 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 02:19:21" (1/1) ... [2022-07-12 02:19:21,377 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 02:19:21" (1/1) ... [2022-07-12 02:19:21,380 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 02:19:21,381 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 02:19:21,382 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 02:19:21,382 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 02:19:21,383 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 02:19:21" (1/1) ... [2022-07-12 02:19:21,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 02:19:21,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 02:19:21,425 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) [2022-07-12 02:19:21,451 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 [2022-07-12 02:19:21,467 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 02:19:21,467 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 02:19:21,467 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 02:19:21,468 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 02:19:21,523 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 02:19:21,524 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 02:19:21,623 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 02:19:21,628 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 02:19:21,629 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-07-12 02:19:21,630 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 02:19:21 BoogieIcfgContainer [2022-07-12 02:19:21,630 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 02:19:21,633 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 02:19:21,633 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 02:19:21,636 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 02:19:21,636 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 02:19:21" (1/3) ... [2022-07-12 02:19:21,637 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@172d3d7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 02:19:21, skipping insertion in model container [2022-07-12 02:19:21,637 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 02:19:21" (2/3) ... [2022-07-12 02:19:21,638 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@172d3d7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 02:19:21, skipping insertion in model container [2022-07-12 02:19:21,638 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 02:19:21" (3/3) ... [2022-07-12 02:19:21,639 INFO L111 eAbstractionObserver]: Analyzing ICFG square_6.i [2022-07-12 02:19:21,652 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 02:19:21,652 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-12 02:19:21,706 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 02:19:21,714 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@19f770c4, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1a9cdc6f [2022-07-12 02:19:21,715 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-12 02:19:21,720 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) [2022-07-12 02:19:21,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-12 02:19:21,727 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 02:19:21,728 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-12 02:19:21,728 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 02:19:21,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 02:19:21,735 INFO L85 PathProgramCache]: Analyzing trace with hash 889508712, now seen corresponding path program 1 times [2022-07-12 02:19:21,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 02:19:21,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567313988] [2022-07-12 02:19:21,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 02:19:21,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 02:19:21,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 02:19:21,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 02:19:21,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 02:19:21,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567313988] [2022-07-12 02:19:21,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567313988] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 02:19:21,885 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 02:19:21,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 02:19:21,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093091860] [2022-07-12 02:19:21,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 02:19:21,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 02:19:21,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 02:19:21,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 02:19:21,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 02:19:21,924 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) [2022-07-12 02:19:21,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 02:19:21,935 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2022-07-12 02:19:21,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 02:19:21,937 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 [2022-07-12 02:19:21,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 02:19:21,942 INFO L225 Difference]: With dead ends: 19 [2022-07-12 02:19:21,942 INFO L226 Difference]: Without dead ends: 7 [2022-07-12 02:19:21,945 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 [2022-07-12 02:19:21,949 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 [2022-07-12 02:19:21,950 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] [2022-07-12 02:19:21,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2022-07-12 02:19:21,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2022-07-12 02:19:21,973 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) [2022-07-12 02:19:21,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 6 transitions. [2022-07-12 02:19:21,974 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 6 transitions. Word has length 6 [2022-07-12 02:19:21,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 02:19:21,974 INFO L495 AbstractCegarLoop]: Abstraction has 7 states and 6 transitions. [2022-07-12 02:19:21,975 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) [2022-07-12 02:19:21,975 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 6 transitions. [2022-07-12 02:19:21,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-12 02:19:21,975 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 02:19:21,975 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-12 02:19:21,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 02:19:21,976 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 02:19:21,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 02:19:21,977 INFO L85 PathProgramCache]: Analyzing trace with hash 889568294, now seen corresponding path program 1 times [2022-07-12 02:19:21,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 02:19:21,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106857837] [2022-07-12 02:19:21,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 02:19:21,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 02:19:22,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 02:19:22,002 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 02:19:22,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 02:19:22,024 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 02:19:22,027 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 02:19:22,037 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-07-12 02:19:22,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-12 02:19:22,042 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1] [2022-07-12 02:19:22,045 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-12 02:19:22,059 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.07 02:19:22 BoogieIcfgContainer [2022-07-12 02:19:22,059 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-12 02:19:22,060 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-12 02:19:22,061 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-12 02:19:22,061 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-12 02:19:22,061 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 02:19:21" (3/4) ... [2022-07-12 02:19:22,064 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-07-12 02:19:22,064 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-12 02:19:22,065 INFO L158 Benchmark]: Toolchain (without parser) took 1000.83ms. Allocated memory was 100.7MB in the beginning and 125.8MB in the end (delta: 25.2MB). Free memory was 72.4MB in the beginning and 102.0MB in the end (delta: -29.6MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-12 02:19:22,066 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 100.7MB. Free memory is still 57.5MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-12 02:19:22,069 INFO L158 Benchmark]: CACSL2BoogieTranslator took 260.35ms. Allocated memory was 100.7MB in the beginning and 125.8MB in the end (delta: 25.2MB). Free memory was 72.1MB in the beginning and 102.4MB in the end (delta: -30.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-12 02:19:22,071 INFO L158 Benchmark]: Boogie Procedure Inliner took 29.32ms. Allocated memory is still 125.8MB. Free memory was 102.4MB in the beginning and 100.8MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-12 02:19:22,072 INFO L158 Benchmark]: Boogie Preprocessor took 22.13ms. Allocated memory is still 125.8MB. Free memory was 100.8MB in the beginning and 99.9MB in the end (delta: 830.3kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-12 02:19:22,072 INFO L158 Benchmark]: RCFGBuilder took 249.25ms. Allocated memory is still 125.8MB. Free memory was 99.9MB in the beginning and 91.1MB in the end (delta: 8.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-12 02:19:22,073 INFO L158 Benchmark]: TraceAbstraction took 427.13ms. Allocated memory is still 125.8MB. Free memory was 90.7MB in the beginning and 102.0MB in the end (delta: -11.3MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2022-07-12 02:19:22,073 INFO L158 Benchmark]: Witness Printer took 4.17ms. Allocated memory is still 125.8MB. Free memory is still 102.0MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-12 02:19:22,075 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 100.7MB. Free memory is still 57.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 260.35ms. Allocated memory was 100.7MB in the beginning and 125.8MB in the end (delta: 25.2MB). Free memory was 72.1MB in the beginning and 102.4MB in the end (delta: -30.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 29.32ms. Allocated memory is still 125.8MB. Free memory was 102.4MB in the beginning and 100.8MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 22.13ms. Allocated memory is still 125.8MB. Free memory was 100.8MB in the beginning and 99.9MB in the end (delta: 830.3kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 249.25ms. Allocated memory is still 125.8MB. Free memory was 99.9MB in the beginning and 91.1MB in the end (delta: 8.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 427.13ms. Allocated memory is still 125.8MB. Free memory was 90.7MB in the beginning and 102.0MB in the end (delta: -11.3MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * Witness Printer took 4.17ms. Allocated memory is still 125.8MB. Free memory is still 102.0MB. There was no memory consumed. 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 < 1.399f) 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: 0.4s, 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 [2022-07-12 02:19:22,118 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... --- 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_6.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 4ac72755bf7b6cf6783fc81d967700fe96c3125d200b2cb393ef40778dc8a8fd --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 02:19:24,077 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 02:19:24,079 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 02:19:24,111 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 02:19:24,111 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 02:19:24,113 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 02:19:24,116 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 02:19:24,118 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 02:19:24,120 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 02:19:24,124 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 02:19:24,125 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 02:19:24,129 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 02:19:24,130 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 02:19:24,131 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 02:19:24,132 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 02:19:24,134 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 02:19:24,134 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 02:19:24,135 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 02:19:24,136 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 02:19:24,138 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 02:19:24,139 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 02:19:24,143 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 02:19:24,144 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 02:19:24,145 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 02:19:24,145 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 02:19:24,154 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 02:19:24,154 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 02:19:24,155 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 02:19:24,155 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 02:19:24,156 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 02:19:24,157 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 02:19:24,160 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 02:19:24,161 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 02:19:24,162 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 02:19:24,163 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 02:19:24,163 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 02:19:24,164 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 02:19:24,165 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 02:19:24,165 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 02:19:24,166 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 02:19:24,166 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 02:19:24,167 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 02:19:24,171 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2022-07-12 02:19:24,196 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 02:19:24,196 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 02:19:24,197 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 02:19:24,197 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 02:19:24,198 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 02:19:24,198 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 02:19:24,198 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 02:19:24,199 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 02:19:24,199 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 02:19:24,200 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 02:19:24,200 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 02:19:24,200 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 02:19:24,201 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 02:19:24,201 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-12 02:19:24,201 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 02:19:24,201 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-12 02:19:24,201 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-12 02:19:24,201 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-12 02:19:24,202 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-12 02:19:24,202 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 02:19:24,202 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-12 02:19:24,202 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 02:19:24,203 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-12 02:19:24,203 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 02:19:24,203 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 02:19:24,203 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 02:19:24,203 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 02:19:24,204 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 02:19:24,204 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 02:19:24,204 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-12 02:19:24,204 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-12 02:19:24,205 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-12 02:19:24,205 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-12 02:19:24,205 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-12 02:19:24,205 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-12 02:19:24,206 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-12 02:19:24,206 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ac72755bf7b6cf6783fc81d967700fe96c3125d200b2cb393ef40778dc8a8fd [2022-07-12 02:19:24,482 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 02:19:24,504 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 02:19:24,507 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 02:19:24,508 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 02:19:24,508 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 02:19:24,510 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/floats-cdfpl/square_6.i [2022-07-12 02:19:24,564 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e1e3c51ae/5d48748e6f3e47d091478e3ff1f6f510/FLAG7e5f9b440 [2022-07-12 02:19:25,010 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 02:19:25,011 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/floats-cdfpl/square_6.i [2022-07-12 02:19:25,016 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e1e3c51ae/5d48748e6f3e47d091478e3ff1f6f510/FLAG7e5f9b440 [2022-07-12 02:19:25,035 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e1e3c51ae/5d48748e6f3e47d091478e3ff1f6f510 [2022-07-12 02:19:25,037 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 02:19:25,050 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 02:19:25,053 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 02:19:25,053 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 02:19:25,057 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 02:19:25,057 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 02:19:25" (1/1) ... [2022-07-12 02:19:25,058 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1521c073 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 02:19:25, skipping insertion in model container [2022-07-12 02:19:25,058 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 02:19:25" (1/1) ... [2022-07-12 02:19:25,063 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 02:19:25,074 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 02:19:25,212 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_6.i[1627,1640] [2022-07-12 02:19:25,215 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 02:19:25,226 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 02:19:25,254 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_6.i[1627,1640] [2022-07-12 02:19:25,255 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 02:19:25,286 INFO L208 MainTranslator]: Completed translation [2022-07-12 02:19:25,287 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 02:19:25 WrapperNode [2022-07-12 02:19:25,287 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 02:19:25,288 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 02:19:25,288 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 02:19:25,288 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 02:19:25,294 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 02:19:25" (1/1) ... [2022-07-12 02:19:25,303 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 02:19:25" (1/1) ... [2022-07-12 02:19:25,317 INFO L137 Inliner]: procedures = 16, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 22 [2022-07-12 02:19:25,318 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 02:19:25,319 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 02:19:25,319 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 02:19:25,320 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 02:19:25,327 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 02:19:25" (1/1) ... [2022-07-12 02:19:25,327 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 02:19:25" (1/1) ... [2022-07-12 02:19:25,338 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 02:19:25" (1/1) ... [2022-07-12 02:19:25,338 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 02:19:25" (1/1) ... [2022-07-12 02:19:25,350 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 02:19:25" (1/1) ... [2022-07-12 02:19:25,355 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 02:19:25" (1/1) ... [2022-07-12 02:19:25,357 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 02:19:25" (1/1) ... [2022-07-12 02:19:25,359 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 02:19:25,361 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 02:19:25,361 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 02:19:25,362 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 02:19:25,362 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 02:19:25" (1/1) ... [2022-07-12 02:19:25,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 02:19:25,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 02:19:25,396 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) [2022-07-12 02:19:25,426 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 [2022-07-12 02:19:25,442 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 02:19:25,443 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-07-12 02:19:25,443 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 02:19:25,443 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 02:19:25,505 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 02:19:25,506 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 02:19:27,706 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 02:19:27,711 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 02:19:27,711 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-07-12 02:19:27,713 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 02:19:27 BoogieIcfgContainer [2022-07-12 02:19:27,713 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 02:19:27,714 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 02:19:27,714 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 02:19:27,717 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 02:19:27,717 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 02:19:25" (1/3) ... [2022-07-12 02:19:27,718 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77aa459 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 02:19:27, skipping insertion in model container [2022-07-12 02:19:27,718 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 02:19:25" (2/3) ... [2022-07-12 02:19:27,718 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77aa459 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 02:19:27, skipping insertion in model container [2022-07-12 02:19:27,718 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 02:19:27" (3/3) ... [2022-07-12 02:19:27,720 INFO L111 eAbstractionObserver]: Analyzing ICFG square_6.i [2022-07-12 02:19:27,732 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 02:19:27,734 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-12 02:19:27,784 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 02:19:27,790 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@3fc590ba, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1bf41748 [2022-07-12 02:19:27,790 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-12 02:19:27,794 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) [2022-07-12 02:19:27,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-12 02:19:27,799 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 02:19:27,800 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-12 02:19:27,800 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 02:19:27,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 02:19:27,805 INFO L85 PathProgramCache]: Analyzing trace with hash 889508712, now seen corresponding path program 1 times [2022-07-12 02:19:27,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 02:19:27,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [454479728] [2022-07-12 02:19:27,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 02:19:27,816 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 02:19:27,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 02:19:27,819 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) [2022-07-12 02:19:27,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-12 02:19:28,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 02:19:28,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 1 conjunts are in the unsatisfiable core [2022-07-12 02:19:28,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 02:19:28,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 02:19:28,270 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 02:19:28,270 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 02:19:28,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [454479728] [2022-07-12 02:19:28,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [454479728] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 02:19:28,271 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 02:19:28,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 02:19:28,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698220175] [2022-07-12 02:19:28,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 02:19:28,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 02:19:28,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 02:19:28,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 02:19:28,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 02:19:28,305 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) [2022-07-12 02:19:28,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 02:19:28,316 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2022-07-12 02:19:28,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 02:19:28,318 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 [2022-07-12 02:19:28,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 02:19:28,324 INFO L225 Difference]: With dead ends: 19 [2022-07-12 02:19:28,324 INFO L226 Difference]: Without dead ends: 7 [2022-07-12 02:19:28,327 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 [2022-07-12 02:19:28,333 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 [2022-07-12 02:19:28,335 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] [2022-07-12 02:19:28,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2022-07-12 02:19:28,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2022-07-12 02:19:28,361 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) [2022-07-12 02:19:28,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 6 transitions. [2022-07-12 02:19:28,362 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 6 transitions. Word has length 6 [2022-07-12 02:19:28,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 02:19:28,363 INFO L495 AbstractCegarLoop]: Abstraction has 7 states and 6 transitions. [2022-07-12 02:19:28,363 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) [2022-07-12 02:19:28,363 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 6 transitions. [2022-07-12 02:19:28,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-12 02:19:28,363 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 02:19:28,364 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-12 02:19:28,380 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-07-12 02:19:28,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 02:19:28,568 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 02:19:28,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 02:19:28,569 INFO L85 PathProgramCache]: Analyzing trace with hash 889568294, now seen corresponding path program 1 times [2022-07-12 02:19:28,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 02:19:28,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [623409128] [2022-07-12 02:19:28,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 02:19:28,569 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 02:19:28,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 02:19:28,573 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) [2022-07-12 02:19:28,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process