./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 eb692b52 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-?-eb692b5 [2022-07-19 13:28:14,485 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 13:28:14,487 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 13:28:14,512 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 13:28:14,513 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 13:28:14,514 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 13:28:14,518 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 13:28:14,523 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 13:28:14,525 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 13:28:14,530 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 13:28:14,531 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 13:28:14,532 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 13:28:14,533 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 13:28:14,534 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 13:28:14,535 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 13:28:14,536 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 13:28:14,538 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 13:28:14,539 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 13:28:14,543 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 13:28:14,544 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 13:28:14,548 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 13:28:14,549 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 13:28:14,550 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 13:28:14,551 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 13:28:14,552 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 13:28:14,554 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 13:28:14,556 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 13:28:14,557 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 13:28:14,558 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 13:28:14,558 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 13:28:14,559 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 13:28:14,559 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 13:28:14,561 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 13:28:14,561 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 13:28:14,562 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 13:28:14,562 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 13:28:14,563 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 13:28:14,563 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 13:28:14,563 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 13:28:14,564 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 13:28:14,564 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 13:28:14,566 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 13:28:14,567 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 13:28:14,597 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 13:28:14,597 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 13:28:14,597 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 13:28:14,598 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 13:28:14,598 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 13:28:14,598 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 13:28:14,603 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 13:28:14,604 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 13:28:14,604 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 13:28:14,605 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 13:28:14,605 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 13:28:14,605 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 13:28:14,605 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 13:28:14,605 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 13:28:14,606 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 13:28:14,606 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 13:28:14,606 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 13:28:14,606 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 13:28:14,606 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 13:28:14,606 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 13:28:14,607 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 13:28:14,607 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 13:28:14,607 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 13:28:14,607 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 13:28:14,607 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 13:28:14,608 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 13:28:14,608 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 13:28:14,608 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 13:28:14,608 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 13:28:14,608 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 13:28:14,609 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 13:28:14,609 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 13:28:14,609 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 13:28:14,609 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 95850d9ace07be9fad13430ca25ab838987eafca40e87b378615766ec56483f7 [2022-07-19 13:28:14,855 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 13:28:14,882 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 13:28:14,884 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 13:28:14,885 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 13:28:14,887 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 13:28:14,888 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/floats-cdfpl/square_5.i [2022-07-19 13:28:14,938 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/21c8174d0/4e150ce590a046cab604b5e800138889/FLAG765bd0b2a [2022-07-19 13:28:15,352 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 13:28:15,353 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/floats-cdfpl/square_5.i [2022-07-19 13:28:15,358 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/21c8174d0/4e150ce590a046cab604b5e800138889/FLAG765bd0b2a [2022-07-19 13:28:15,765 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/21c8174d0/4e150ce590a046cab604b5e800138889 [2022-07-19 13:28:15,766 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 13:28:15,767 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 13:28:15,769 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 13:28:15,769 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 13:28:15,772 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 13:28:15,773 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 01:28:15" (1/1) ... [2022-07-19 13:28:15,774 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2013f3c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 01:28:15, skipping insertion in model container [2022-07-19 13:28:15,774 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 01:28:15" (1/1) ... [2022-07-19 13:28:15,779 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 13:28:15,790 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 13:28:15,957 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] [2022-07-19 13:28:15,960 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 13:28:15,967 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 13:28:15,984 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] [2022-07-19 13:28:15,985 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 13:28:15,997 INFO L208 MainTranslator]: Completed translation [2022-07-19 13:28:15,997 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 01:28:15 WrapperNode [2022-07-19 13:28:15,998 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 13:28:15,998 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 13:28:15,999 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 13:28:15,999 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 13:28:16,004 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 01:28:15" (1/1) ... [2022-07-19 13:28:16,009 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 01:28:15" (1/1) ... [2022-07-19 13:28:16,022 INFO L137 Inliner]: procedures = 15, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 21 [2022-07-19 13:28:16,022 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 13:28:16,023 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 13:28:16,023 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 13:28:16,023 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 13:28:16,028 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 01:28:15" (1/1) ... [2022-07-19 13:28:16,029 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 01:28:15" (1/1) ... [2022-07-19 13:28:16,030 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 01:28:15" (1/1) ... [2022-07-19 13:28:16,031 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 01:28:15" (1/1) ... [2022-07-19 13:28:16,037 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 01:28:15" (1/1) ... [2022-07-19 13:28:16,039 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 01:28:15" (1/1) ... [2022-07-19 13:28:16,040 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 01:28:15" (1/1) ... [2022-07-19 13:28:16,042 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 13:28:16,044 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 13:28:16,044 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 13:28:16,044 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 13:28:16,045 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 01:28:15" (1/1) ... [2022-07-19 13:28:16,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 13:28:16,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 13:28:16,077 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) [2022-07-19 13:28:16,094 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 [2022-07-19 13:28:16,119 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 13:28:16,119 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 13:28:16,119 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 13:28:16,119 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 13:28:16,169 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 13:28:16,171 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 13:28:16,258 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 13:28:16,263 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 13:28:16,263 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-07-19 13:28:16,265 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 01:28:16 BoogieIcfgContainer [2022-07-19 13:28:16,265 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 13:28:16,267 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 13:28:16,268 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 13:28:16,270 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 13:28:16,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 01:28:15" (1/3) ... [2022-07-19 13:28:16,271 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ea95f5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 01:28:16, skipping insertion in model container [2022-07-19 13:28:16,271 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 01:28:15" (2/3) ... [2022-07-19 13:28:16,272 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ea95f5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 01:28:16, skipping insertion in model container [2022-07-19 13:28:16,272 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 01:28:16" (3/3) ... [2022-07-19 13:28:16,273 INFO L111 eAbstractionObserver]: Analyzing ICFG square_5.i [2022-07-19 13:28:16,284 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 13:28:16,285 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 13:28:16,337 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 13:28:16,343 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@15837bdd, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@725db606 [2022-07-19 13:28:16,343 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 13:28:16,348 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) [2022-07-19 13:28:16,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-19 13:28:16,360 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 13:28:16,360 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-19 13:28:16,361 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 13:28:16,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 13:28:16,367 INFO L85 PathProgramCache]: Analyzing trace with hash 889508712, now seen corresponding path program 1 times [2022-07-19 13:28:16,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 13:28:16,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734209944] [2022-07-19 13:28:16,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 13:28:16,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 13:28:16,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 13:28:16,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 13:28:16,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 13:28:16,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734209944] [2022-07-19 13:28:16,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734209944] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 13:28:16,479 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 13:28:16,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 13:28:16,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115547528] [2022-07-19 13:28:16,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 13:28:16,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 13:28:16,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 13:28:16,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 13:28:16,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 13:28:16,515 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) [2022-07-19 13:28:16,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 13:28:16,525 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2022-07-19 13:28:16,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 13:28:16,526 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 [2022-07-19 13:28:16,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 13:28:16,532 INFO L225 Difference]: With dead ends: 19 [2022-07-19 13:28:16,533 INFO L226 Difference]: Without dead ends: 7 [2022-07-19 13:28:16,535 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 [2022-07-19 13:28:16,539 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 [2022-07-19 13:28:16,540 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] [2022-07-19 13:28:16,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2022-07-19 13:28:16,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2022-07-19 13:28:16,557 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) [2022-07-19 13:28:16,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 6 transitions. [2022-07-19 13:28:16,558 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 6 transitions. Word has length 6 [2022-07-19 13:28:16,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 13:28:16,559 INFO L495 AbstractCegarLoop]: Abstraction has 7 states and 6 transitions. [2022-07-19 13:28:16,559 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) [2022-07-19 13:28:16,559 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 6 transitions. [2022-07-19 13:28:16,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-19 13:28:16,560 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 13:28:16,560 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-19 13:28:16,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 13:28:16,560 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 13:28:16,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 13:28:16,561 INFO L85 PathProgramCache]: Analyzing trace with hash 889568294, now seen corresponding path program 1 times [2022-07-19 13:28:16,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 13:28:16,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834753116] [2022-07-19 13:28:16,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 13:28:16,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 13:28:16,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 13:28:16,584 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 13:28:16,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 13:28:16,605 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 13:28:16,605 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 13:28:16,606 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-07-19 13:28:16,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 13:28:16,611 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1] [2022-07-19 13:28:16,614 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-19 13:28:16,629 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.07 01:28:16 BoogieIcfgContainer [2022-07-19 13:28:16,629 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-19 13:28:16,630 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-19 13:28:16,630 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-19 13:28:16,630 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-19 13:28:16,630 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 01:28:16" (3/4) ... [2022-07-19 13:28:16,633 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-07-19 13:28:16,633 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-19 13:28:16,634 INFO L158 Benchmark]: Toolchain (without parser) took 865.90ms. Allocated memory is still 102.8MB. Free memory was 65.6MB in the beginning and 44.6MB in the end (delta: 21.0MB). Peak memory consumption was 22.5MB. Max. memory is 16.1GB. [2022-07-19 13:28:16,634 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 102.8MB. Free memory is still 82.3MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-19 13:28:16,635 INFO L158 Benchmark]: CACSL2BoogieTranslator took 228.80ms. Allocated memory is still 102.8MB. Free memory was 65.4MB in the beginning and 78.8MB in the end (delta: -13.4MB). Peak memory consumption was 9.9MB. Max. memory is 16.1GB. [2022-07-19 13:28:16,635 INFO L158 Benchmark]: Boogie Procedure Inliner took 23.75ms. Allocated memory is still 102.8MB. Free memory was 78.8MB in the beginning and 77.4MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-19 13:28:16,635 INFO L158 Benchmark]: Boogie Preprocessor took 19.47ms. Allocated memory is still 102.8MB. Free memory was 77.1MB in the beginning and 76.4MB in the end (delta: 747.7kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-19 13:28:16,636 INFO L158 Benchmark]: RCFGBuilder took 221.56ms. Allocated memory is still 102.8MB. Free memory was 76.4MB in the beginning and 67.6MB in the end (delta: 8.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-07-19 13:28:16,636 INFO L158 Benchmark]: TraceAbstraction took 361.76ms. Allocated memory is still 102.8MB. Free memory was 67.3MB in the beginning and 45.1MB in the end (delta: 22.3MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2022-07-19 13:28:16,637 INFO L158 Benchmark]: Witness Printer took 3.30ms. Allocated memory is still 102.8MB. Free memory was 45.1MB in the beginning and 44.6MB in the end (delta: 492.4kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-19 13:28:16,639 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 102.8MB. Free memory is still 82.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 228.80ms. Allocated memory is still 102.8MB. Free memory was 65.4MB in the beginning and 78.8MB in the end (delta: -13.4MB). Peak memory consumption was 9.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 23.75ms. Allocated memory is still 102.8MB. Free memory was 78.8MB in the beginning and 77.4MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 19.47ms. Allocated memory is still 102.8MB. Free memory was 77.1MB in the beginning and 76.4MB in the end (delta: 747.7kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 221.56ms. Allocated memory is still 102.8MB. Free memory was 76.4MB in the beginning and 67.6MB in the end (delta: 8.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 361.76ms. Allocated memory is still 102.8MB. Free memory was 67.3MB in the beginning and 45.1MB in the end (delta: 22.3MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * Witness Printer took 3.30ms. Allocated memory is still 102.8MB. Free memory was 45.1MB in the beginning and 44.6MB in the end (delta: 492.4kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 38]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 37, overapproximation of someBinaryArithmeticFLOAToperation at line 35. Possible FailurePath: [L29] float IN = __VERIFIER_nondet_float(); [L30] CALL assume_abort_if_not(IN >= 0.0f && IN < 1.0f) [L24] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1] [L30] RET assume_abort_if_not(IN >= 0.0f && IN < 1.0f) [L32] float x = IN; [L34-L35] float result = 1.0f + 0.5f*x - 0.125f*x*x + 0.0625f*x*x*x - 0.0390625f*x*x*x*x; VAL [IN=49, x=49] [L37] COND TRUE !(result >= 0.0f && result < 1.3985f) 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, 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 [2022-07-19 13:28:16,675 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/floats-cdfpl/square_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-?-eb692b5 [2022-07-19 13:28:18,591 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 13:28:18,594 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 13:28:18,640 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 13:28:18,640 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 13:28:18,641 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 13:28:18,645 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 13:28:18,647 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 13:28:18,649 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 13:28:18,653 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 13:28:18,654 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 13:28:18,656 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 13:28:18,656 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 13:28:18,658 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 13:28:18,659 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 13:28:18,664 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 13:28:18,665 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 13:28:18,666 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 13:28:18,667 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 13:28:18,674 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 13:28:18,675 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 13:28:18,676 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 13:28:18,677 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 13:28:18,678 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 13:28:18,679 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 13:28:18,685 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 13:28:18,686 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 13:28:18,686 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 13:28:18,687 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 13:28:18,687 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 13:28:18,688 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 13:28:18,688 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 13:28:18,690 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 13:28:18,691 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 13:28:18,692 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 13:28:18,693 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 13:28:18,693 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 13:28:18,694 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 13:28:18,694 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 13:28:18,694 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 13:28:18,695 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 13:28:18,696 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 13:28:18,701 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2022-07-19 13:28:18,731 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 13:28:18,732 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 13:28:18,732 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 13:28:18,732 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 13:28:18,733 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 13:28:18,733 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 13:28:18,734 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 13:28:18,734 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 13:28:18,734 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 13:28:18,735 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 13:28:18,735 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 13:28:18,735 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 13:28:18,736 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 13:28:18,736 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 13:28:18,736 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 13:28:18,736 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 13:28:18,736 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-19 13:28:18,736 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-19 13:28:18,737 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-19 13:28:18,737 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 13:28:18,737 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 13:28:18,737 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 13:28:18,737 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 13:28:18,738 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 13:28:18,738 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 13:28:18,738 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 13:28:18,738 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 13:28:18,738 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 13:28:18,739 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 13:28:18,739 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 13:28:18,739 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-19 13:28:18,739 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-19 13:28:18,740 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 13:28:18,740 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 13:28:18,740 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 13:28:18,740 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-19 13:28:18,740 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 95850d9ace07be9fad13430ca25ab838987eafca40e87b378615766ec56483f7 [2022-07-19 13:28:19,001 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 13:28:19,017 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 13:28:19,019 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 13:28:19,020 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 13:28:19,023 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 13:28:19,024 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/floats-cdfpl/square_5.i [2022-07-19 13:28:19,081 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2fb5f1e84/ef95eefbd7244f5bb8bc9fc0479e39a9/FLAGa44f34a5a [2022-07-19 13:28:19,477 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 13:28:19,477 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/floats-cdfpl/square_5.i [2022-07-19 13:28:19,482 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2fb5f1e84/ef95eefbd7244f5bb8bc9fc0479e39a9/FLAGa44f34a5a [2022-07-19 13:28:19,891 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2fb5f1e84/ef95eefbd7244f5bb8bc9fc0479e39a9 [2022-07-19 13:28:19,893 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 13:28:19,894 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 13:28:19,896 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 13:28:19,896 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 13:28:19,899 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 13:28:19,899 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 01:28:19" (1/1) ... [2022-07-19 13:28:19,901 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8c5a96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 01:28:19, skipping insertion in model container [2022-07-19 13:28:19,901 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 01:28:19" (1/1) ... [2022-07-19 13:28:19,907 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 13:28:19,924 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 13:28:20,047 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] [2022-07-19 13:28:20,051 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 13:28:20,062 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 13:28:20,074 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] [2022-07-19 13:28:20,075 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 13:28:20,091 INFO L208 MainTranslator]: Completed translation [2022-07-19 13:28:20,092 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 01:28:20 WrapperNode [2022-07-19 13:28:20,092 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 13:28:20,093 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 13:28:20,093 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 13:28:20,093 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 13:28:20,099 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 01:28:20" (1/1) ... [2022-07-19 13:28:20,114 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 01:28:20" (1/1) ... [2022-07-19 13:28:20,129 INFO L137 Inliner]: procedures = 16, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 22 [2022-07-19 13:28:20,129 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 13:28:20,130 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 13:28:20,130 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 13:28:20,131 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 13:28:20,137 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 01:28:20" (1/1) ... [2022-07-19 13:28:20,137 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 01:28:20" (1/1) ... [2022-07-19 13:28:20,148 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 01:28:20" (1/1) ... [2022-07-19 13:28:20,148 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 01:28:20" (1/1) ... [2022-07-19 13:28:20,152 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 01:28:20" (1/1) ... [2022-07-19 13:28:20,154 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 01:28:20" (1/1) ... [2022-07-19 13:28:20,155 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 01:28:20" (1/1) ... [2022-07-19 13:28:20,157 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 13:28:20,158 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 13:28:20,158 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 13:28:20,158 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 13:28:20,158 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 01:28:20" (1/1) ... [2022-07-19 13:28:20,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 13:28:20,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 13:28:20,185 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) [2022-07-19 13:28:20,190 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 [2022-07-19 13:28:20,217 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 13:28:20,218 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-07-19 13:28:20,218 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 13:28:20,218 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 13:28:20,265 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 13:28:20,267 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 13:28:22,433 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 13:28:22,438 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 13:28:22,438 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-07-19 13:28:22,440 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 01:28:22 BoogieIcfgContainer [2022-07-19 13:28:22,440 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 13:28:22,441 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 13:28:22,441 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 13:28:22,456 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 13:28:22,456 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 01:28:19" (1/3) ... [2022-07-19 13:28:22,457 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d6476f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 01:28:22, skipping insertion in model container [2022-07-19 13:28:22,457 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 01:28:20" (2/3) ... [2022-07-19 13:28:22,457 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d6476f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 01:28:22, skipping insertion in model container [2022-07-19 13:28:22,457 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 01:28:22" (3/3) ... [2022-07-19 13:28:22,458 INFO L111 eAbstractionObserver]: Analyzing ICFG square_5.i [2022-07-19 13:28:22,467 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 13:28:22,467 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 13:28:22,514 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 13:28:22,519 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@7c36c3c9, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7846a1d2 [2022-07-19 13:28:22,520 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 13:28:22,523 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) [2022-07-19 13:28:22,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-19 13:28:22,527 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 13:28:22,528 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-19 13:28:22,528 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 13:28:22,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 13:28:22,532 INFO L85 PathProgramCache]: Analyzing trace with hash 889508712, now seen corresponding path program 1 times [2022-07-19 13:28:22,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-19 13:28:22,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [291447148] [2022-07-19 13:28:22,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 13:28:22,542 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-19 13:28:22,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-19 13:28:22,544 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) [2022-07-19 13:28:22,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-19 13:28:23,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 13:28:23,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 1 conjunts are in the unsatisfiable core [2022-07-19 13:28:23,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 13:28:23,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 13:28:23,063 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 13:28:23,064 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-19 13:28:23,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [291447148] [2022-07-19 13:28:23,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [291447148] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 13:28:23,065 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 13:28:23,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 13:28:23,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437754222] [2022-07-19 13:28:23,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 13:28:23,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 13:28:23,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-19 13:28:23,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 13:28:23,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 13:28:23,100 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) [2022-07-19 13:28:23,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 13:28:23,113 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2022-07-19 13:28:23,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 13:28:23,115 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 [2022-07-19 13:28:23,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 13:28:23,121 INFO L225 Difference]: With dead ends: 19 [2022-07-19 13:28:23,121 INFO L226 Difference]: Without dead ends: 7 [2022-07-19 13:28:23,124 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 [2022-07-19 13:28:23,127 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 [2022-07-19 13:28:23,128 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] [2022-07-19 13:28:23,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2022-07-19 13:28:23,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2022-07-19 13:28:23,150 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) [2022-07-19 13:28:23,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 6 transitions. [2022-07-19 13:28:23,152 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 6 transitions. Word has length 6 [2022-07-19 13:28:23,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 13:28:23,152 INFO L495 AbstractCegarLoop]: Abstraction has 7 states and 6 transitions. [2022-07-19 13:28:23,153 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) [2022-07-19 13:28:23,153 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 6 transitions. [2022-07-19 13:28:23,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-19 13:28:23,153 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 13:28:23,154 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-19 13:28:23,175 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-07-19 13:28:23,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-19 13:28:23,373 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 13:28:23,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 13:28:23,374 INFO L85 PathProgramCache]: Analyzing trace with hash 889568294, now seen corresponding path program 1 times [2022-07-19 13:28:23,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-19 13:28:23,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [515202666] [2022-07-19 13:28:23,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 13:28:23,375 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-19 13:28:23,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-19 13:28:23,377 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) [2022-07-19 13:28:23,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process