./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/floats-cdfpl/square_5.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3a877d22 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_5.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 95850d9ace07be9fad13430ca25ab838987eafca40e87b378615766ec56483f7 --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 10:21:03,115 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 10:21:03,116 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 10:21:03,141 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 10:21:03,141 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 10:21:03,142 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 10:21:03,144 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 10:21:03,145 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 10:21:03,146 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 10:21:03,147 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 10:21:03,148 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 10:21:03,149 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 10:21:03,149 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 10:21:03,150 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 10:21:03,151 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 10:21:03,152 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 10:21:03,153 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 10:21:03,154 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 10:21:03,155 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 10:21:03,157 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 10:21:03,159 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 10:21:03,160 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 10:21:03,161 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 10:21:03,162 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 10:21:03,164 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 10:21:03,165 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 10:21:03,165 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 10:21:03,166 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 10:21:03,166 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 10:21:03,167 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 10:21:03,167 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 10:21:03,168 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 10:21:03,169 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 10:21:03,169 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 10:21:03,170 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 10:21:03,171 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 10:21:03,171 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 10:21:03,171 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 10:21:03,172 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 10:21:03,173 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 10:21:03,173 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 10:21:03,174 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 10:21:03,195 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 10:21:03,195 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 10:21:03,195 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 10:21:03,196 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 10:21:03,196 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 10:21:03,197 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 10:21:03,197 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 10:21:03,197 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 10:21:03,198 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 10:21:03,198 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 10:21:03,198 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 10:21:03,198 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 10:21:03,199 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 10:21:03,199 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 10:21:03,199 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 10:21:03,199 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 10:21:03,200 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 10:21:03,200 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 10:21:03,200 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 10:21:03,200 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 10:21:03,200 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 10:21:03,201 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 10:21:03,201 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 10:21:03,201 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 10:21:03,201 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 10:21:03,202 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 10:21:03,202 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 10:21:03,202 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 10:21:03,202 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 10:21:03,203 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 10:21:03,205 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 10:21:03,205 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 10:21:03,206 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 10:21:03,206 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 10:21:03,206 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 95850d9ace07be9fad13430ca25ab838987eafca40e87b378615766ec56483f7 [2021-12-15 10:21:03,394 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 10:21:03,422 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 10:21:03,425 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 10:21:03,426 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 10:21:03,427 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 10:21:03,428 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/floats-cdfpl/square_5.i [2021-12-15 10:21:03,505 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/96d430525/9450134afd584b978e22d1644b8bf2bd/FLAG6052a996c [2021-12-15 10:21:03,877 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 10:21:03,878 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/floats-cdfpl/square_5.i [2021-12-15 10:21:03,888 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/96d430525/9450134afd584b978e22d1644b8bf2bd/FLAG6052a996c [2021-12-15 10:21:03,898 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/96d430525/9450134afd584b978e22d1644b8bf2bd [2021-12-15 10:21:03,903 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 10:21:03,905 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 10:21:03,908 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 10:21:03,908 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 10:21:03,911 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 10:21:03,911 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:21:03" (1/1) ... [2021-12-15 10:21:03,912 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6368caba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:21:03, skipping insertion in model container [2021-12-15 10:21:03,913 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:21:03" (1/1) ... [2021-12-15 10:21:03,918 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 10:21:03,932 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 10:21:04,111 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_5.i[1628,1641] [2021-12-15 10:21:04,115 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 10:21:04,121 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 10:21:04,132 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_5.i[1628,1641] [2021-12-15 10:21:04,133 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 10:21:04,143 INFO L208 MainTranslator]: Completed translation [2021-12-15 10:21:04,143 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:21:04 WrapperNode [2021-12-15 10:21:04,144 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 10:21:04,145 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 10:21:04,145 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 10:21:04,145 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 10:21:04,151 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:21:04" (1/1) ... [2021-12-15 10:21:04,158 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:21:04" (1/1) ... [2021-12-15 10:21:04,173 INFO L137 Inliner]: procedures = 15, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 21 [2021-12-15 10:21:04,173 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 10:21:04,174 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 10:21:04,174 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 10:21:04,174 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 10:21:04,180 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:21:04" (1/1) ... [2021-12-15 10:21:04,180 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:21:04" (1/1) ... [2021-12-15 10:21:04,182 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:21:04" (1/1) ... [2021-12-15 10:21:04,182 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:21:04" (1/1) ... [2021-12-15 10:21:04,191 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:21:04" (1/1) ... [2021-12-15 10:21:04,192 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:21:04" (1/1) ... [2021-12-15 10:21:04,194 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:21:04" (1/1) ... [2021-12-15 10:21:04,197 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 10:21:04,198 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 10:21:04,198 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 10:21:04,198 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 10:21:04,199 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:21:04" (1/1) ... [2021-12-15 10:21:04,204 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 10:21:04,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:21:04,222 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-15 10:21:04,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-15 10:21:04,246 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 10:21:04,246 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 10:21:04,247 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 10:21:04,247 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 10:21:04,285 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 10:21:04,286 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 10:21:04,339 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 10:21:04,343 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 10:21:04,344 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-15 10:21:04,345 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:21:04 BoogieIcfgContainer [2021-12-15 10:21:04,345 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 10:21:04,346 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 10:21:04,347 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 10:21:04,349 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 10:21:04,349 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 10:21:03" (1/3) ... [2021-12-15 10:21:04,350 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19bad5a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:21:04, skipping insertion in model container [2021-12-15 10:21:04,350 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:21:04" (2/3) ... [2021-12-15 10:21:04,350 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19bad5a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:21:04, skipping insertion in model container [2021-12-15 10:21:04,351 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:21:04" (3/3) ... [2021-12-15 10:21:04,352 INFO L111 eAbstractionObserver]: Analyzing ICFG square_5.i [2021-12-15 10:21:04,355 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 10:21:04,356 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 10:21:04,390 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 10:21:04,396 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-15 10:21:04,396 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 10:21:04,406 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:21:04,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-15 10:21:04,410 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:21:04,410 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-15 10:21:04,411 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:21:04,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:21:04,415 INFO L85 PathProgramCache]: Analyzing trace with hash 889508712, now seen corresponding path program 1 times [2021-12-15 10:21:04,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:21:04,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667059498] [2021-12-15 10:21:04,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:21:04,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:21:04,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:21:04,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:21:04,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:21:04,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667059498] [2021-12-15 10:21:04,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667059498] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:21:04,543 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 10:21:04,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 10:21:04,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411083042] [2021-12-15 10:21:04,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:21:04,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-15 10:21:04,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:21:04,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-15 10:21:04,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-15 10:21:04,591 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:21:04,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:21:04,600 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2021-12-15 10:21:04,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-15 10:21:04,602 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-15 10:21:04,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:21:04,617 INFO L225 Difference]: With dead ends: 19 [2021-12-15 10:21:04,617 INFO L226 Difference]: Without dead ends: 7 [2021-12-15 10:21:04,620 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-15 10:21:04,624 INFO L933 BasicCegarLoop]: 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 [2021-12-15 10:21:04,625 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 10:21:04,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2021-12-15 10:21:04,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2021-12-15 10:21:04,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 6 states have (on average 1.0) internal successors, (6), 6 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:21:04,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 6 transitions. [2021-12-15 10:21:04,647 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 6 transitions. Word has length 6 [2021-12-15 10:21:04,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:21:04,648 INFO L470 AbstractCegarLoop]: Abstraction has 7 states and 6 transitions. [2021-12-15 10:21:04,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:21:04,648 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 6 transitions. [2021-12-15 10:21:04,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-15 10:21:04,649 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:21:04,649 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-15 10:21:04,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 10:21:04,650 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:21:04,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:21:04,653 INFO L85 PathProgramCache]: Analyzing trace with hash 889568294, now seen corresponding path program 1 times [2021-12-15 10:21:04,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:21:04,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272827517] [2021-12-15 10:21:04,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:21:04,654 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:21:04,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-15 10:21:04,684 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-15 10:21:04,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-15 10:21:04,723 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-15 10:21:04,724 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-15 10:21:04,726 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-15 10:21:04,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 10:21:04,733 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1] [2021-12-15 10:21:04,736 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-15 10:21:04,758 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.12 10:21:04 BoogieIcfgContainer [2021-12-15 10:21:04,759 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-15 10:21:04,760 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-15 10:21:04,760 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-15 10:21:04,760 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-15 10:21:04,761 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:21:04" (3/4) ... [2021-12-15 10:21:04,763 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-12-15 10:21:04,764 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-15 10:21:04,765 INFO L158 Benchmark]: Toolchain (without parser) took 859.97ms. Allocated memory was 96.5MB in the beginning and 132.1MB in the end (delta: 35.7MB). Free memory was 62.7MB in the beginning and 100.8MB in the end (delta: -38.2MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-15 10:21:04,766 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 96.5MB. Free memory was 51.5MB in the beginning and 51.5MB in the end (delta: 38.8kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-15 10:21:04,768 INFO L158 Benchmark]: CACSL2BoogieTranslator took 236.10ms. Allocated memory is still 96.5MB. Free memory was 62.5MB in the beginning and 71.3MB in the end (delta: -8.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-15 10:21:04,769 INFO L158 Benchmark]: Boogie Procedure Inliner took 28.88ms. Allocated memory is still 96.5MB. Free memory was 71.3MB in the beginning and 69.8MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-15 10:21:04,770 INFO L158 Benchmark]: Boogie Preprocessor took 22.64ms. Allocated memory is still 96.5MB. Free memory was 69.8MB in the beginning and 68.9MB in the end (delta: 848.5kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-15 10:21:04,772 INFO L158 Benchmark]: RCFGBuilder took 147.61ms. Allocated memory is still 96.5MB. Free memory was 68.9MB in the beginning and 60.5MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-15 10:21:04,772 INFO L158 Benchmark]: TraceAbstraction took 412.78ms. Allocated memory was 96.5MB in the beginning and 132.1MB in the end (delta: 35.7MB). Free memory was 60.1MB in the beginning and 101.4MB in the end (delta: -41.3MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-15 10:21:04,773 INFO L158 Benchmark]: Witness Printer took 4.36ms. Allocated memory is still 132.1MB. Free memory was 101.4MB in the beginning and 100.8MB in the end (delta: 597.4kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-15 10:21:04,778 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 96.5MB. Free memory was 51.5MB in the beginning and 51.5MB in the end (delta: 38.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 236.10ms. Allocated memory is still 96.5MB. Free memory was 62.5MB in the beginning and 71.3MB in the end (delta: -8.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 28.88ms. Allocated memory is still 96.5MB. Free memory was 71.3MB in the beginning and 69.8MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 22.64ms. Allocated memory is still 96.5MB. Free memory was 69.8MB in the beginning and 68.9MB in the end (delta: 848.5kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 147.61ms. Allocated memory is still 96.5MB. Free memory was 68.9MB in the beginning and 60.5MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 412.78ms. Allocated memory was 96.5MB in the beginning and 132.1MB in the end (delta: 35.7MB). Free memory was 60.1MB in the beginning and 101.4MB in the end (delta: -41.3MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 4.36ms. Allocated memory is still 132.1MB. Free memory was 101.4MB in the beginning and 100.8MB in the end (delta: 597.4kB). 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 < 1.3985f) 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, PartialOrderReductionTime: 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 [2021-12-15 10:21:04,822 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_5.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 95850d9ace07be9fad13430ca25ab838987eafca40e87b378615766ec56483f7 --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 10:21:06,664 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 10:21:06,665 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 10:21:06,689 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 10:21:06,691 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 10:21:06,693 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 10:21:06,694 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 10:21:06,698 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 10:21:06,700 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 10:21:06,701 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 10:21:06,702 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 10:21:06,703 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 10:21:06,703 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 10:21:06,704 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 10:21:06,705 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 10:21:06,706 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 10:21:06,707 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 10:21:06,708 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 10:21:06,709 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 10:21:06,711 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 10:21:06,712 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 10:21:06,713 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 10:21:06,714 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 10:21:06,715 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 10:21:06,717 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 10:21:06,717 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 10:21:06,718 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 10:21:06,718 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 10:21:06,719 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 10:21:06,720 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 10:21:06,720 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 10:21:06,721 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 10:21:06,721 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 10:21:06,722 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 10:21:06,723 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 10:21:06,723 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 10:21:06,724 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 10:21:06,724 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 10:21:06,724 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 10:21:06,725 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 10:21:06,726 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 10:21:06,726 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-12-15 10:21:06,763 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 10:21:06,763 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 10:21:06,763 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 10:21:06,763 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 10:21:06,764 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 10:21:06,764 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 10:21:06,765 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 10:21:06,765 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 10:21:06,765 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 10:21:06,765 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 10:21:06,766 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 10:21:06,766 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 10:21:06,766 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 10:21:06,766 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 10:21:06,766 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 10:21:06,767 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 10:21:06,767 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-15 10:21:06,767 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-15 10:21:06,767 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-15 10:21:06,767 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 10:21:06,768 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 10:21:06,768 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 10:21:06,768 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 10:21:06,768 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 10:21:06,768 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 10:21:06,769 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 10:21:06,769 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 10:21:06,769 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 10:21:06,769 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 10:21:06,769 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 10:21:06,770 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-15 10:21:06,770 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-15 10:21:06,770 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 10:21:06,770 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 10:21:06,770 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 10:21:06,771 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 10:21:06,771 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-15 10:21:06,771 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 95850d9ace07be9fad13430ca25ab838987eafca40e87b378615766ec56483f7 [2021-12-15 10:21:07,064 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 10:21:07,083 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 10:21:07,086 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 10:21:07,087 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 10:21:07,088 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 10:21:07,089 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/floats-cdfpl/square_5.i [2021-12-15 10:21:07,146 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9543b2ceb/ff705d85430a4ff881614b0122095e1c/FLAG8a8362b42 [2021-12-15 10:21:07,542 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 10:21:07,542 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/floats-cdfpl/square_5.i [2021-12-15 10:21:07,548 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9543b2ceb/ff705d85430a4ff881614b0122095e1c/FLAG8a8362b42 [2021-12-15 10:21:07,562 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9543b2ceb/ff705d85430a4ff881614b0122095e1c [2021-12-15 10:21:07,564 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 10:21:07,567 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 10:21:07,568 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 10:21:07,568 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 10:21:07,571 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 10:21:07,571 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:21:07" (1/1) ... [2021-12-15 10:21:07,572 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a1d87ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:21:07, skipping insertion in model container [2021-12-15 10:21:07,572 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:21:07" (1/1) ... [2021-12-15 10:21:07,577 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 10:21:07,593 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 10:21:07,747 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_5.i[1628,1641] [2021-12-15 10:21:07,752 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 10:21:07,763 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 10:21:07,830 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_5.i[1628,1641] [2021-12-15 10:21:07,831 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 10:21:07,850 INFO L208 MainTranslator]: Completed translation [2021-12-15 10:21:07,851 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:21:07 WrapperNode [2021-12-15 10:21:07,851 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 10:21:07,852 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 10:21:07,852 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 10:21:07,852 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 10:21:07,858 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:21:07" (1/1) ... [2021-12-15 10:21:07,866 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:21:07" (1/1) ... [2021-12-15 10:21:07,881 INFO L137 Inliner]: procedures = 16, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 22 [2021-12-15 10:21:07,881 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 10:21:07,882 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 10:21:07,883 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 10:21:07,883 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 10:21:07,889 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:21:07" (1/1) ... [2021-12-15 10:21:07,890 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:21:07" (1/1) ... [2021-12-15 10:21:07,899 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:21:07" (1/1) ... [2021-12-15 10:21:07,900 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:21:07" (1/1) ... [2021-12-15 10:21:07,913 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:21:07" (1/1) ... [2021-12-15 10:21:07,915 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:21:07" (1/1) ... [2021-12-15 10:21:07,916 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:21:07" (1/1) ... [2021-12-15 10:21:07,918 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 10:21:07,921 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 10:21:07,921 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 10:21:07,922 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 10:21:07,922 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:21:07" (1/1) ... [2021-12-15 10:21:07,928 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 10:21:07,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:21:07,948 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-15 10:21:07,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-15 10:21:08,000 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 10:21:08,000 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-15 10:21:08,000 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 10:21:08,000 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 10:21:08,063 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 10:21:08,064 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 10:21:10,229 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 10:21:10,233 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 10:21:10,234 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-15 10:21:10,235 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:21:10 BoogieIcfgContainer [2021-12-15 10:21:10,235 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 10:21:10,236 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 10:21:10,236 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 10:21:10,239 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 10:21:10,247 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 10:21:07" (1/3) ... [2021-12-15 10:21:10,248 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5661ed51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:21:10, skipping insertion in model container [2021-12-15 10:21:10,248 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:21:07" (2/3) ... [2021-12-15 10:21:10,248 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5661ed51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:21:10, skipping insertion in model container [2021-12-15 10:21:10,249 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:21:10" (3/3) ... [2021-12-15 10:21:10,250 INFO L111 eAbstractionObserver]: Analyzing ICFG square_5.i [2021-12-15 10:21:10,254 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 10:21:10,254 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 10:21:10,295 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 10:21:10,299 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-15 10:21:10,300 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 10:21:10,308 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:21:10,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-15 10:21:10,311 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:21:10,312 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-15 10:21:10,312 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:21:10,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:21:10,316 INFO L85 PathProgramCache]: Analyzing trace with hash 889508712, now seen corresponding path program 1 times [2021-12-15 10:21:10,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 10:21:10,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [542883516] [2021-12-15 10:21:10,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:21:10,329 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 10:21:10,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 10:21:10,332 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-15 10:21:10,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-15 10:21:10,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:21:10,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 1 conjunts are in the unsatisfiable core [2021-12-15 10:21:10,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:21:10,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:21:10,836 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 10:21:10,836 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 10:21:10,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [542883516] [2021-12-15 10:21:10,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [542883516] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:21:10,837 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 10:21:10,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 10:21:10,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150734673] [2021-12-15 10:21:10,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:21:10,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-15 10:21:10,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 10:21:10,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-15 10:21:10,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-15 10:21:10,873 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:21:10,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:21:10,888 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2021-12-15 10:21:10,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-15 10:21:10,889 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-15 10:21:10,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:21:10,893 INFO L225 Difference]: With dead ends: 19 [2021-12-15 10:21:10,893 INFO L226 Difference]: Without dead ends: 7 [2021-12-15 10:21:10,895 INFO L932 BasicCegarLoop]: 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 [2021-12-15 10:21:10,898 INFO L933 BasicCegarLoop]: 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 [2021-12-15 10:21:10,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 10:21:10,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2021-12-15 10:21:10,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2021-12-15 10:21:10,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 6 states have (on average 1.0) internal successors, (6), 6 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:21:10,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 6 transitions. [2021-12-15 10:21:10,917 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 6 transitions. Word has length 6 [2021-12-15 10:21:10,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:21:10,917 INFO L470 AbstractCegarLoop]: Abstraction has 7 states and 6 transitions. [2021-12-15 10:21:10,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:21:10,917 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 6 transitions. [2021-12-15 10:21:10,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-15 10:21:10,918 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:21:10,918 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-15 10:21:10,940 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-15 10:21:11,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-15 10:21:11,136 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:21:11,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:21:11,137 INFO L85 PathProgramCache]: Analyzing trace with hash 889568294, now seen corresponding path program 1 times [2021-12-15 10:21:11,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 10:21:11,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [757452414] [2021-12-15 10:21:11,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:21:11,138 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 10:21:11,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 10:21:11,141 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-15 10:21:11,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process