./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/float-benchs/sqrt_biNewton_pseudoconstant.c --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/float-benchs/sqrt_biNewton_pseudoconstant.c -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 8967790177fc14e8157cff1ce1fb723d3ab55513216099f6dbb82db8bc4d5837 --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 10:26:08,470 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 10:26:08,472 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 10:26:08,507 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 10:26:08,507 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 10:26:08,508 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 10:26:08,509 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 10:26:08,519 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 10:26:08,522 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 10:26:08,524 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 10:26:08,525 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 10:26:08,526 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 10:26:08,526 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 10:26:08,530 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 10:26:08,531 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 10:26:08,532 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 10:26:08,534 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 10:26:08,534 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 10:26:08,537 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 10:26:08,539 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 10:26:08,541 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 10:26:08,542 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 10:26:08,543 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 10:26:08,543 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 10:26:08,549 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 10:26:08,550 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 10:26:08,550 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 10:26:08,551 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 10:26:08,552 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 10:26:08,552 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 10:26:08,553 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 10:26:08,553 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 10:26:08,554 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 10:26:08,555 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 10:26:08,556 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 10:26:08,556 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 10:26:08,557 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 10:26:08,557 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 10:26:08,557 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 10:26:08,557 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 10:26:08,558 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 10:26:08,559 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 10:26:08,583 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 10:26:08,583 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 10:26:08,584 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 10:26:08,584 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 10:26:08,584 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 10:26:08,585 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 10:26:08,585 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 10:26:08,585 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 10:26:08,585 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 10:26:08,585 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 10:26:08,586 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 10:26:08,586 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 10:26:08,586 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 10:26:08,587 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 10:26:08,587 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 10:26:08,587 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 10:26:08,587 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 10:26:08,587 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 10:26:08,587 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 10:26:08,587 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 10:26:08,588 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 10:26:08,588 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 10:26:08,588 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 10:26:08,588 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 10:26:08,588 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 10:26:08,588 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 10:26:08,589 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 10:26:08,590 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 10:26:08,590 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 10:26:08,590 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 10:26:08,590 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 10:26:08,590 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 10:26:08,590 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 10:26:08,591 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 10:26:08,591 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8967790177fc14e8157cff1ce1fb723d3ab55513216099f6dbb82db8bc4d5837 [2021-12-15 10:26:08,785 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 10:26:08,803 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 10:26:08,805 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 10:26:08,806 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 10:26:08,807 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 10:26:08,808 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/sqrt_biNewton_pseudoconstant.c [2021-12-15 10:26:08,858 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9038c4bab/72f73aaac9a04bd7a4d60559dbe30a55/FLAG735128a18 [2021-12-15 10:26:09,202 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 10:26:09,203 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/sqrt_biNewton_pseudoconstant.c [2021-12-15 10:26:09,207 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9038c4bab/72f73aaac9a04bd7a4d60559dbe30a55/FLAG735128a18 [2021-12-15 10:26:09,220 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9038c4bab/72f73aaac9a04bd7a4d60559dbe30a55 [2021-12-15 10:26:09,222 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 10:26:09,223 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 10:26:09,224 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 10:26:09,224 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 10:26:09,228 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 10:26:09,229 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:26:09" (1/1) ... [2021-12-15 10:26:09,230 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7fae4cf4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:26:09, skipping insertion in model container [2021-12-15 10:26:09,230 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:26:09" (1/1) ... [2021-12-15 10:26:09,235 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 10:26:09,247 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 10:26:09,377 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/float-benchs/sqrt_biNewton_pseudoconstant.c[570,583] [2021-12-15 10:26:09,398 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 10:26:09,404 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 10:26:09,414 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/float-benchs/sqrt_biNewton_pseudoconstant.c[570,583] [2021-12-15 10:26:09,433 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 10:26:09,443 INFO L208 MainTranslator]: Completed translation [2021-12-15 10:26:09,444 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:26:09 WrapperNode [2021-12-15 10:26:09,444 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 10:26:09,445 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 10:26:09,445 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 10:26:09,445 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 10:26:09,450 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:26:09" (1/1) ... [2021-12-15 10:26:09,455 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:26:09" (1/1) ... [2021-12-15 10:26:09,473 INFO L137 Inliner]: procedures = 15, calls = 10, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 74 [2021-12-15 10:26:09,473 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 10:26:09,474 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 10:26:09,474 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 10:26:09,474 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 10:26:09,480 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:26:09" (1/1) ... [2021-12-15 10:26:09,480 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:26:09" (1/1) ... [2021-12-15 10:26:09,487 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:26:09" (1/1) ... [2021-12-15 10:26:09,488 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:26:09" (1/1) ... [2021-12-15 10:26:09,496 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:26:09" (1/1) ... [2021-12-15 10:26:09,499 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:26:09" (1/1) ... [2021-12-15 10:26:09,502 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:26:09" (1/1) ... [2021-12-15 10:26:09,505 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 10:26:09,506 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 10:26:09,506 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 10:26:09,506 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 10:26:09,507 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:26:09" (1/1) ... [2021-12-15 10:26:09,512 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 10:26:09,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:26:09,528 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 10:26:09,534 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 10:26:09,558 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 10:26:09,559 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 10:26:09,559 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 10:26:09,559 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 10:26:09,605 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 10:26:09,607 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 10:26:09,729 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 10:26:09,733 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 10:26:09,733 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-15 10:26:09,735 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:26:09 BoogieIcfgContainer [2021-12-15 10:26:09,735 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 10:26:09,736 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 10:26:09,736 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 10:26:09,738 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 10:26:09,744 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 10:26:09" (1/3) ... [2021-12-15 10:26:09,745 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c24ae83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:26:09, skipping insertion in model container [2021-12-15 10:26:09,745 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:26:09" (2/3) ... [2021-12-15 10:26:09,746 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c24ae83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:26:09, skipping insertion in model container [2021-12-15 10:26:09,746 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:26:09" (3/3) ... [2021-12-15 10:26:09,747 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt_biNewton_pseudoconstant.c [2021-12-15 10:26:09,750 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 10:26:09,763 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 10:26:09,821 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 10:26:09,825 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 10:26:09,827 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 10:26:09,842 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 18 states have internal predecessors, (25), 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 10:26:09,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-15 10:26:09,849 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:26:09,849 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:26:09,850 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:26:09,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:26:09,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1569195288, now seen corresponding path program 1 times [2021-12-15 10:26:09,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:26:09,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126168900] [2021-12-15 10:26:09,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:26:09,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:26:09,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:26:09,983 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 10:26:09,983 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:26:09,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126168900] [2021-12-15 10:26:09,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126168900] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:26:09,985 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 10:26:09,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 10:26:09,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114880356] [2021-12-15 10:26:09,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:26:09,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-15 10:26:09,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:26:10,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-15 10:26:10,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-15 10:26:10,013 INFO L87 Difference]: Start difference. First operand has 19 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 18 states have internal predecessors, (25), 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 6.0) internal successors, (12), 2 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 10:26:10,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:26:10,038 INFO L93 Difference]: Finished difference Result 36 states and 48 transitions. [2021-12-15 10:26:10,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-15 10:26:10,040 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 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) Word has length 12 [2021-12-15 10:26:10,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:26:10,045 INFO L225 Difference]: With dead ends: 36 [2021-12-15 10:26:10,046 INFO L226 Difference]: Without dead ends: 15 [2021-12-15 10:26:10,048 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 10:26:10,054 INFO L933 BasicCegarLoop]: 21 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, 21 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 10:26:10,055 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 10:26:10,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-12-15 10:26:10,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-12-15 10:26:10,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 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 10:26:10,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2021-12-15 10:26:10,078 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 12 [2021-12-15 10:26:10,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:26:10,079 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2021-12-15 10:26:10,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 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 10:26:10,079 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2021-12-15 10:26:10,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-15 10:26:10,080 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:26:10,080 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:26:10,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 10:26:10,081 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:26:10,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:26:10,082 INFO L85 PathProgramCache]: Analyzing trace with hash -2049407722, now seen corresponding path program 1 times [2021-12-15 10:26:10,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:26:10,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870380860] [2021-12-15 10:26:10,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:26:10,082 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:26:10,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-15 10:26:10,109 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-15 10:26:10,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-15 10:26:10,141 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-15 10:26:10,141 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-15 10:26:10,143 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-15 10:26:10,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 10:26:10,148 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1] [2021-12-15 10:26:10,151 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-15 10:26:10,179 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.12 10:26:10 BoogieIcfgContainer [2021-12-15 10:26:10,179 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-15 10:26:10,181 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-15 10:26:10,182 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-15 10:26:10,182 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-15 10:26:10,182 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:26:09" (3/4) ... [2021-12-15 10:26:10,184 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-12-15 10:26:10,185 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-15 10:26:10,187 INFO L158 Benchmark]: Toolchain (without parser) took 962.87ms. Allocated memory was 100.7MB in the beginning and 130.0MB in the end (delta: 29.4MB). Free memory was 71.7MB in the beginning and 97.5MB in the end (delta: -25.9MB). Peak memory consumption was 3.6MB. Max. memory is 16.1GB. [2021-12-15 10:26:10,187 INFO L158 Benchmark]: CDTParser took 0.34ms. Allocated memory is still 100.7MB. Free memory was 57.5MB in the beginning and 57.5MB in the end (delta: 28.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-15 10:26:10,189 INFO L158 Benchmark]: CACSL2BoogieTranslator took 220.59ms. Allocated memory is still 100.7MB. Free memory was 71.5MB in the beginning and 76.1MB in the end (delta: -4.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-15 10:26:10,190 INFO L158 Benchmark]: Boogie Procedure Inliner took 28.56ms. Allocated memory is still 100.7MB. Free memory was 76.1MB in the beginning and 74.6MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-15 10:26:10,192 INFO L158 Benchmark]: Boogie Preprocessor took 30.76ms. Allocated memory is still 100.7MB. Free memory was 74.6MB in the beginning and 73.3MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-15 10:26:10,193 INFO L158 Benchmark]: RCFGBuilder took 229.12ms. Allocated memory is still 100.7MB. Free memory was 73.3MB in the beginning and 63.9MB in the end (delta: 9.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-15 10:26:10,193 INFO L158 Benchmark]: TraceAbstraction took 443.47ms. Allocated memory was 100.7MB in the beginning and 130.0MB in the end (delta: 29.4MB). Free memory was 63.2MB in the beginning and 97.5MB in the end (delta: -34.4MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-15 10:26:10,193 INFO L158 Benchmark]: Witness Printer took 4.03ms. Allocated memory is still 130.0MB. Free memory is still 97.5MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-15 10:26:10,195 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34ms. Allocated memory is still 100.7MB. Free memory was 57.5MB in the beginning and 57.5MB in the end (delta: 28.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 220.59ms. Allocated memory is still 100.7MB. Free memory was 71.5MB in the beginning and 76.1MB in the end (delta: -4.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 28.56ms. Allocated memory is still 100.7MB. Free memory was 76.1MB in the beginning and 74.6MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 30.76ms. Allocated memory is still 100.7MB. Free memory was 74.6MB in the beginning and 73.3MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 229.12ms. Allocated memory is still 100.7MB. Free memory was 73.3MB in the beginning and 63.9MB in the end (delta: 9.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 443.47ms. Allocated memory was 100.7MB in the beginning and 130.0MB in the end (delta: 29.4MB). Free memory was 63.2MB in the beginning and 97.5MB in the end (delta: -34.4MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 4.03ms. Allocated memory is still 130.0MB. Free memory is still 97.5MB. 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: 13]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryDOUBLEComparisonOperation at line 53, overapproximation of someUnaryDOUBLEoperation at line 25, overapproximation of someBinaryArithmeticDOUBLEoperation at line 38. Possible FailurePath: [L15] double _EPS = 1e-6; VAL [_EPS=1/1000000] [L43] double d, dd, r; [L44] double epsilon = 1e-8; [L46] d = 1. VAL [_EPS=1/1000000, d=1, epsilon=1/100000000] [L46] COND TRUE d <= 20. [L48] dd = __VERIFIER_nondet_double() [L49] CALL assume_abort_if_not(dd >= d-epsilon && dd <= d+epsilon) [L11] COND FALSE !(!cond) VAL [\old(cond)=1, _EPS=1/1000000, cond=1] [L49] RET assume_abort_if_not(dd >= d-epsilon && dd <= d+epsilon) [L51] CALL, EXPR SqrtR(dd) [L19] double xn, xnp1, residu, lsup, linf; [L20] int i, cond; VAL [\old(Input)=50, _EPS=1/1000000, Input=50] [L21] COND TRUE Input <= 1.0 [L21] xn = 1.0 VAL [\old(Input)=50, _EPS=1/1000000, Input=50, xn=1] [L22] xnp1 = xn [L23] residu = 2.0*_EPS*(xn+xnp1) [L24] lsup = _EPS * (xn+xnp1) [L25] linf = -lsup [L26] cond = ((residu > lsup) || (residu < linf)) [L27] i = 0 VAL [\old(Input)=50, _EPS=1/1000000, cond=0, i=0, Input=50, xn=1, xn=1] [L28] COND FALSE !(\read(cond)) VAL [\old(Input)=50, _EPS=1/1000000, cond=0, i=0, Input=50, xn=1, xn=1] [L38] return 1.0 / xnp1; VAL [\old(Input)=50, _EPS=1/1000000, cond=0, i=0, Input=50, xn=1, xn=1] [L51] RET, EXPR SqrtR(dd) [L51] r = SqrtR(dd) [L53] CALL __VERIFIER_assert(r >= 0.9 && r <= 5.) [L13] COND TRUE !(cond) VAL [\old(cond)=0, _EPS=1/1000000, cond=0] [L13] reach_error() VAL [\old(cond)=0, _EPS=1/1000000, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 19 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, 21 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, 21 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=19occurred 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, 24 NumberOfCodeBlocks, 24 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 11 ConstructedInterpolants, 0 QuantifiedInterpolants, 11 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 10:26:10,229 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/float-benchs/sqrt_biNewton_pseudoconstant.c -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 8967790177fc14e8157cff1ce1fb723d3ab55513216099f6dbb82db8bc4d5837 --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 10:26:11,786 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 10:26:11,789 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 10:26:11,811 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 10:26:11,813 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 10:26:11,816 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 10:26:11,817 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 10:26:11,821 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 10:26:11,823 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 10:26:11,826 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 10:26:11,826 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 10:26:11,829 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 10:26:11,829 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 10:26:11,831 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 10:26:11,832 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 10:26:11,834 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 10:26:11,835 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 10:26:11,835 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 10:26:11,838 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 10:26:11,843 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 10:26:11,845 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 10:26:11,845 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 10:26:11,846 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 10:26:11,847 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 10:26:11,850 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 10:26:11,852 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 10:26:11,852 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 10:26:11,852 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 10:26:11,853 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 10:26:11,854 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 10:26:11,854 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 10:26:11,855 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 10:26:11,856 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 10:26:11,856 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 10:26:11,857 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 10:26:11,857 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 10:26:11,858 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 10:26:11,858 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 10:26:11,858 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 10:26:11,859 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 10:26:11,860 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 10:26:11,860 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-12-15 10:26:11,888 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 10:26:11,888 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 10:26:11,889 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 10:26:11,889 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 10:26:11,890 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 10:26:11,890 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 10:26:11,891 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 10:26:11,891 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 10:26:11,891 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 10:26:11,891 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 10:26:11,892 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 10:26:11,892 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 10:26:11,892 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 10:26:11,892 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 10:26:11,892 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 10:26:11,892 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 10:26:11,892 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-15 10:26:11,893 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-15 10:26:11,893 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-15 10:26:11,893 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 10:26:11,893 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 10:26:11,893 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 10:26:11,893 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 10:26:11,893 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 10:26:11,900 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 10:26:11,900 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 10:26:11,900 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 10:26:11,901 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 10:26:11,901 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 10:26:11,901 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 10:26:11,901 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-15 10:26:11,901 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-15 10:26:11,902 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 10:26:11,902 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 10:26:11,902 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 10:26:11,902 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 10:26:11,902 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-15 10:26:11,902 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8967790177fc14e8157cff1ce1fb723d3ab55513216099f6dbb82db8bc4d5837 [2021-12-15 10:26:12,172 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 10:26:12,191 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 10:26:12,193 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 10:26:12,193 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 10:26:12,194 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 10:26:12,195 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/sqrt_biNewton_pseudoconstant.c [2021-12-15 10:26:12,234 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/210258d4f/77fc6f9ec15345389732dfed81bbf00c/FLAGb186fdea6 [2021-12-15 10:26:12,581 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 10:26:12,582 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/sqrt_biNewton_pseudoconstant.c [2021-12-15 10:26:12,586 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/210258d4f/77fc6f9ec15345389732dfed81bbf00c/FLAGb186fdea6 [2021-12-15 10:26:13,013 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/210258d4f/77fc6f9ec15345389732dfed81bbf00c [2021-12-15 10:26:13,016 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 10:26:13,017 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 10:26:13,018 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 10:26:13,018 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 10:26:13,029 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 10:26:13,029 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:26:13" (1/1) ... [2021-12-15 10:26:13,030 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ee6cc41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:26:13, skipping insertion in model container [2021-12-15 10:26:13,030 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:26:13" (1/1) ... [2021-12-15 10:26:13,035 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 10:26:13,044 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 10:26:13,125 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/float-benchs/sqrt_biNewton_pseudoconstant.c[570,583] [2021-12-15 10:26:13,138 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 10:26:13,153 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 10:26:13,164 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/float-benchs/sqrt_biNewton_pseudoconstant.c[570,583] [2021-12-15 10:26:13,192 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 10:26:13,212 INFO L208 MainTranslator]: Completed translation [2021-12-15 10:26:13,213 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:26:13 WrapperNode [2021-12-15 10:26:13,213 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 10:26:13,214 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 10:26:13,214 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 10:26:13,214 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 10:26:13,218 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:26:13" (1/1) ... [2021-12-15 10:26:13,231 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:26:13" (1/1) ... [2021-12-15 10:26:13,249 INFO L137 Inliner]: procedures = 16, calls = 10, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 75 [2021-12-15 10:26:13,250 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 10:26:13,251 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 10:26:13,251 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 10:26:13,251 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 10:26:13,256 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:26:13" (1/1) ... [2021-12-15 10:26:13,257 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:26:13" (1/1) ... [2021-12-15 10:26:13,261 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:26:13" (1/1) ... [2021-12-15 10:26:13,262 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:26:13" (1/1) ... [2021-12-15 10:26:13,275 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:26:13" (1/1) ... [2021-12-15 10:26:13,279 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:26:13" (1/1) ... [2021-12-15 10:26:13,282 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:26:13" (1/1) ... [2021-12-15 10:26:13,283 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 10:26:13,284 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 10:26:13,284 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 10:26:13,285 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 10:26:13,285 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:26:13" (1/1) ... [2021-12-15 10:26:13,291 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 10:26:13,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:26:13,308 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 10:26:13,328 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 10:26:13,339 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 10:26:13,340 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-15 10:26:13,340 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 10:26:13,340 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 10:26:13,395 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 10:26:13,396 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 10:26:21,575 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 10:26:21,579 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 10:26:21,579 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-15 10:26:21,581 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:26:21 BoogieIcfgContainer [2021-12-15 10:26:21,581 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 10:26:21,582 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 10:26:21,582 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 10:26:21,584 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 10:26:21,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 10:26:13" (1/3) ... [2021-12-15 10:26:21,585 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a2600e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:26:21, skipping insertion in model container [2021-12-15 10:26:21,585 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:26:13" (2/3) ... [2021-12-15 10:26:21,585 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a2600e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:26:21, skipping insertion in model container [2021-12-15 10:26:21,585 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:26:21" (3/3) ... [2021-12-15 10:26:21,586 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt_biNewton_pseudoconstant.c [2021-12-15 10:26:21,589 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 10:26:21,590 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 10:26:21,621 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 10:26:21,628 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 10:26:21,629 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 10:26:21,651 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 18 states have internal predecessors, (25), 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 10:26:21,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-15 10:26:21,655 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:26:21,655 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:26:21,656 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:26:21,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:26:21,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1569195288, now seen corresponding path program 1 times [2021-12-15 10:26:21,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 10:26:21,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [676127718] [2021-12-15 10:26:21,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:26:21,671 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 10:26:21,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 10:26:21,673 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 10:26:21,674 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 10:26:22,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:26:22,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 1 conjunts are in the unsatisfiable core [2021-12-15 10:26:22,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:26:22,989 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 10:26:22,989 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 10:26:22,989 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 10:26:22,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [676127718] [2021-12-15 10:26:22,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [676127718] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:26:22,990 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 10:26:22,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 10:26:22,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409972530] [2021-12-15 10:26:22,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:26:22,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-15 10:26:22,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 10:26:23,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-15 10:26:23,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-15 10:26:23,013 INFO L87 Difference]: Start difference. First operand has 19 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 18 states have internal predecessors, (25), 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 6.0) internal successors, (12), 2 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 10:26:23,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:26:23,022 INFO L93 Difference]: Finished difference Result 36 states and 48 transitions. [2021-12-15 10:26:23,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-15 10:26:23,023 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 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) Word has length 12 [2021-12-15 10:26:23,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:26:23,028 INFO L225 Difference]: With dead ends: 36 [2021-12-15 10:26:23,028 INFO L226 Difference]: Without dead ends: 15 [2021-12-15 10:26:23,030 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 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 10:26:23,032 INFO L933 BasicCegarLoop]: 21 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, 21 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 10:26:23,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 10:26:23,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-12-15 10:26:23,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-12-15 10:26:23,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 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 10:26:23,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2021-12-15 10:26:23,051 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 12 [2021-12-15 10:26:23,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:26:23,052 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2021-12-15 10:26:23,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 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 10:26:23,052 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2021-12-15 10:26:23,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-15 10:26:23,052 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:26:23,053 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:26:23,087 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 10:26:23,253 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 10:26:23,254 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:26:23,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:26:23,254 INFO L85 PathProgramCache]: Analyzing trace with hash -2049407722, now seen corresponding path program 1 times [2021-12-15 10:26:23,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 10:26:23,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [16932399] [2021-12-15 10:26:23,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:26:23,255 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 10:26:23,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 10:26:23,256 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 10:26:23,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-15 10:26:24,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:26:24,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-15 10:26:24,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:26:25,577 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 10:26:25,578 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 10:26:25,578 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 10:26:25,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [16932399] [2021-12-15 10:26:25,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [16932399] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:26:25,578 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 10:26:25,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 10:26:25,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828816544] [2021-12-15 10:26:25,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:26:25,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 10:26:25,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 10:26:25,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 10:26:25,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 10:26:25,580 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 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 10:26:28,587 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.52s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-15 10:26:30,948 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.36s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-15 10:26:34,024 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.07s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-15 10:26:36,934 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.52s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-15 10:26:38,959 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-15 10:26:41,431 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-15 10:26:41,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:26:41,486 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2021-12-15 10:26:41,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 10:26:41,487 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 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) Word has length 12 [2021-12-15 10:26:41,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:26:41,487 INFO L225 Difference]: With dead ends: 34 [2021-12-15 10:26:41,487 INFO L226 Difference]: Without dead ends: 21 [2021-12-15 10:26:41,487 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 10:26:41,488 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 1 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.9s IncrementalHoareTripleChecker+Time [2021-12-15 10:26:41,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 33 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 6 Unknown, 0 Unchecked, 15.9s Time] [2021-12-15 10:26:41,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-12-15 10:26:41,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-12-15 10:26:41,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 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 10:26:41,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2021-12-15 10:26:41,492 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 12 [2021-12-15 10:26:41,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:26:41,492 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2021-12-15 10:26:41,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 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 10:26:41,492 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2021-12-15 10:26:41,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-15 10:26:41,493 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:26:41,493 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:26:41,523 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-12-15 10:26:41,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-15 10:26:41,695 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:26:41,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:26:41,695 INFO L85 PathProgramCache]: Analyzing trace with hash -274400360, now seen corresponding path program 1 times [2021-12-15 10:26:41,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 10:26:41,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1671398059] [2021-12-15 10:26:41,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:26:41,696 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 10:26:41,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 10:26:41,697 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-15 10:26:41,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-15 10:26:44,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:26:44,694 WARN L261 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-15 10:26:44,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:27:02,555 WARN L838 $PredicateComparison]: unable to prove that (and (= c_currentRoundingMode roundNearestTiesToEven) (exists ((|ULTIMATE.start_SqrtR_~Input#1| (_ FloatingPoint 11 53))) (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode 1.0))) (and (not (fp.leq |ULTIMATE.start_SqrtR_~Input#1| .cse0)) (fp.leq |ULTIMATE.start_SqrtR_~Input#1| (fp.add c_currentRoundingMode .cse0 ((_ to_fp 11 53) c_currentRoundingMode (/ 1.0 100000000.0)))) (= |c_ULTIMATE.start_SqrtR_~xn~0#1| (fp.div c_currentRoundingMode .cse0 |ULTIMATE.start_SqrtR_~Input#1|))))) (= c_~_EPS~0 ((_ to_fp 11 53) c_currentRoundingMode (/ 1.0 1000000.0)))) is different from false