./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/float-benchs/water_pid.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/float-benchs/water_pid.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 934622c50be6b43827f31f94ee6f464812ea7c1827ffb5fb855e650934cdada0 --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 02:39:14,465 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 02:39:14,466 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 02:39:14,501 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 02:39:14,501 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 02:39:14,502 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 02:39:14,503 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 02:39:14,505 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 02:39:14,506 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 02:39:14,509 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 02:39:14,510 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 02:39:14,512 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 02:39:14,512 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 02:39:14,513 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 02:39:14,514 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 02:39:14,516 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 02:39:14,517 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 02:39:14,518 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 02:39:14,519 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 02:39:14,523 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 02:39:14,524 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 02:39:14,525 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 02:39:14,525 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 02:39:14,526 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 02:39:14,527 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 02:39:14,531 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 02:39:14,532 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 02:39:14,532 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 02:39:14,533 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 02:39:14,533 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 02:39:14,534 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 02:39:14,534 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 02:39:14,535 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 02:39:14,536 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 02:39:14,536 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 02:39:14,537 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 02:39:14,537 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 02:39:14,538 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 02:39:14,538 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 02:39:14,538 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 02:39:14,539 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 02:39:14,540 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 02:39:14,541 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-12 02:39:14,562 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 02:39:14,563 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 02:39:14,563 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 02:39:14,563 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 02:39:14,564 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 02:39:14,564 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 02:39:14,564 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 02:39:14,564 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 02:39:14,564 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 02:39:14,565 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 02:39:14,565 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 02:39:14,565 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 02:39:14,565 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 02:39:14,566 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 02:39:14,566 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-12 02:39:14,566 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 02:39:14,566 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-12 02:39:14,566 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 02:39:14,566 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-12 02:39:14,567 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 02:39:14,567 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-12 02:39:14,568 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 02:39:14,568 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 02:39:14,568 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 02:39:14,568 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 02:39:14,568 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 02:39:14,568 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 02:39:14,568 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-12 02:39:14,569 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 02:39:14,569 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 02:39:14,569 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-12 02:39:14,569 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-12 02:39:14,569 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-12 02:39:14,569 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 934622c50be6b43827f31f94ee6f464812ea7c1827ffb5fb855e650934cdada0 [2022-07-12 02:39:14,761 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 02:39:14,778 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 02:39:14,780 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 02:39:14,781 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 02:39:14,782 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 02:39:14,783 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/water_pid.c [2022-07-12 02:39:14,848 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95fb6f50d/891ef83eb6f7454e8011dbe2d720bc51/FLAGfa86c5ba1 [2022-07-12 02:39:15,189 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 02:39:15,189 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/water_pid.c [2022-07-12 02:39:15,194 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95fb6f50d/891ef83eb6f7454e8011dbe2d720bc51/FLAGfa86c5ba1 [2022-07-12 02:39:15,202 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95fb6f50d/891ef83eb6f7454e8011dbe2d720bc51 [2022-07-12 02:39:15,204 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 02:39:15,205 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 02:39:15,206 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 02:39:15,206 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 02:39:15,208 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 02:39:15,209 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 02:39:15" (1/1) ... [2022-07-12 02:39:15,214 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a287d73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 02:39:15, skipping insertion in model container [2022-07-12 02:39:15,214 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 02:39:15" (1/1) ... [2022-07-12 02:39:15,219 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 02:39:15,231 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 02:39:15,341 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/water_pid.c[452,465] [2022-07-12 02:39:15,356 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 02:39:15,361 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 02:39:15,368 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/water_pid.c[452,465] [2022-07-12 02:39:15,372 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 02:39:15,380 INFO L208 MainTranslator]: Completed translation [2022-07-12 02:39:15,381 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 02:39:15 WrapperNode [2022-07-12 02:39:15,381 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 02:39:15,381 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 02:39:15,382 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 02:39:15,382 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 02:39:15,386 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 02:39:15" (1/1) ... [2022-07-12 02:39:15,391 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 02:39:15" (1/1) ... [2022-07-12 02:39:15,402 INFO L137 Inliner]: procedures = 13, calls = 10, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 56 [2022-07-12 02:39:15,403 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 02:39:15,404 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 02:39:15,404 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 02:39:15,404 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 02:39:15,409 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 02:39:15" (1/1) ... [2022-07-12 02:39:15,409 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 02:39:15" (1/1) ... [2022-07-12 02:39:15,410 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 02:39:15" (1/1) ... [2022-07-12 02:39:15,411 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 02:39:15" (1/1) ... [2022-07-12 02:39:15,418 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 02:39:15" (1/1) ... [2022-07-12 02:39:15,421 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 02:39:15" (1/1) ... [2022-07-12 02:39:15,422 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 02:39:15" (1/1) ... [2022-07-12 02:39:15,423 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 02:39:15,424 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 02:39:15,424 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 02:39:15,424 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 02:39:15,425 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 02:39:15" (1/1) ... [2022-07-12 02:39:15,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 02:39:15,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 02:39:15,446 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-12 02:39:15,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-12 02:39:15,470 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 02:39:15,470 INFO L130 BoogieDeclarations]: Found specification of procedure y [2022-07-12 02:39:15,470 INFO L138 BoogieDeclarations]: Found implementation of procedure y [2022-07-12 02:39:15,471 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 02:39:15,471 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 02:39:15,471 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 02:39:15,517 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 02:39:15,519 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 02:39:15,601 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 02:39:15,608 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 02:39:15,608 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-12 02:39:15,609 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 02:39:15 BoogieIcfgContainer [2022-07-12 02:39:15,609 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 02:39:15,622 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 02:39:15,632 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 02:39:15,635 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 02:39:15,635 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 02:39:15" (1/3) ... [2022-07-12 02:39:15,636 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1eab405f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 02:39:15, skipping insertion in model container [2022-07-12 02:39:15,636 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 02:39:15" (2/3) ... [2022-07-12 02:39:15,636 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1eab405f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 02:39:15, skipping insertion in model container [2022-07-12 02:39:15,637 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 02:39:15" (3/3) ... [2022-07-12 02:39:15,638 INFO L111 eAbstractionObserver]: Analyzing ICFG water_pid.c [2022-07-12 02:39:15,647 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 02:39:15,648 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-12 02:39:15,677 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 02:39:15,682 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@2f26d4d4, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4f9c2b97 [2022-07-12 02:39:15,683 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-12 02:39:15,700 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 15 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 02:39:15,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-12 02:39:15,707 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 02:39:15,708 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 02:39:15,708 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 02:39:15,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 02:39:15,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1533419321, now seen corresponding path program 1 times [2022-07-12 02:39:15,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 02:39:15,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425078869] [2022-07-12 02:39:15,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 02:39:15,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 02:39:15,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 02:39:15,833 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 02:39:15,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 02:39:15,890 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 02:39:15,892 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 02:39:15,893 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-07-12 02:39:15,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 02:39:15,900 INFO L356 BasicCegarLoop]: Path program histogram: [1] [2022-07-12 02:39:15,905 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-12 02:39:15,940 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.07 02:39:15 BoogieIcfgContainer [2022-07-12 02:39:15,941 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-12 02:39:15,943 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-12 02:39:15,943 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-12 02:39:15,943 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-12 02:39:15,944 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 02:39:15" (3/4) ... [2022-07-12 02:39:15,946 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-07-12 02:39:15,947 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-12 02:39:15,948 INFO L158 Benchmark]: Toolchain (without parser) took 742.48ms. Allocated memory was 90.2MB in the beginning and 113.2MB in the end (delta: 23.1MB). Free memory was 59.7MB in the beginning and 62.4MB in the end (delta: -2.8MB). Peak memory consumption was 17.8MB. Max. memory is 16.1GB. [2022-07-12 02:39:15,948 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 90.2MB. Free memory was 48.7MB in the beginning and 48.7MB in the end (delta: 45.0kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-12 02:39:15,950 INFO L158 Benchmark]: CACSL2BoogieTranslator took 175.20ms. Allocated memory was 90.2MB in the beginning and 113.2MB in the end (delta: 23.1MB). Free memory was 59.5MB in the beginning and 89.2MB in the end (delta: -29.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-12 02:39:15,950 INFO L158 Benchmark]: Boogie Procedure Inliner took 21.68ms. Allocated memory is still 113.2MB. Free memory was 89.2MB in the beginning and 87.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-12 02:39:15,953 INFO L158 Benchmark]: Boogie Preprocessor took 19.52ms. Allocated memory is still 113.2MB. Free memory was 87.6MB in the beginning and 86.6MB in the end (delta: 973.8kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-12 02:39:15,954 INFO L158 Benchmark]: RCFGBuilder took 185.81ms. Allocated memory is still 113.2MB. Free memory was 86.6MB in the beginning and 77.5MB in the end (delta: 9.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-12 02:39:15,955 INFO L158 Benchmark]: TraceAbstraction took 318.62ms. Allocated memory is still 113.2MB. Free memory was 76.7MB in the beginning and 62.8MB in the end (delta: 13.9MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-07-12 02:39:15,956 INFO L158 Benchmark]: Witness Printer took 4.15ms. Allocated memory is still 113.2MB. Free memory was 62.8MB in the beginning and 62.4MB in the end (delta: 373.9kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-12 02:39:15,962 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 90.2MB. Free memory was 48.7MB in the beginning and 48.7MB in the end (delta: 45.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 175.20ms. Allocated memory was 90.2MB in the beginning and 113.2MB in the end (delta: 23.1MB). Free memory was 59.5MB in the beginning and 89.2MB in the end (delta: -29.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 21.68ms. Allocated memory is still 113.2MB. Free memory was 89.2MB in the beginning and 87.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 19.52ms. Allocated memory is still 113.2MB. Free memory was 87.6MB in the beginning and 86.6MB in the end (delta: 973.8kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 185.81ms. Allocated memory is still 113.2MB. Free memory was 86.6MB in the beginning and 77.5MB in the end (delta: 9.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 318.62ms. Allocated memory is still 113.2MB. Free memory was 76.7MB in the beginning and 62.8MB in the end (delta: 13.9MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Witness Printer took 4.15ms. Allocated memory is still 113.2MB. Free memory was 62.8MB in the beginning and 62.4MB in the end (delta: 373.9kB). 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: 8]: 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 46, overapproximation of to_real at line 31, overapproximation of someBinaryArithmeticDOUBLEoperation at line 41. Possible FailurePath: [L12] static NUM yn = 0; [L14] NUM ui = 0; [L24] NUM yi, yc; [L25] NUM K; [L26] NUM T; [L27] NUM taui; [L28] NUM taud; [L29] NUM ei, sumej, epi; [L30] int i; [L31] T = 1 [L32] taui = 1 [L33] taud = 1 [L34] K = .5 [L35] yc = .5 VAL [K=1/2, yc=1/2] [L36] CALL, EXPR y(0) VAL [\old(i)=0, \old(yn)=50, yn=50] [L18] yn += ui [L19] return yn; VAL [\old(i)=0, \old(yn)=50, \result=49, i=0, yn=49] [L36] RET, EXPR y(0) VAL [K=1/2, y(0)=49, yc=1/2, yn=49] [L36] yi = y(0) [L37] epi = yc-yi [L38] sumej = epi [L39] i=0 VAL [epi=52, i=0, K=1/2, sumej=52, yc=1/2, yi=49, yn=49] [L39] COND TRUE i<120 VAL [epi=52, i=0, K=1/2, sumej=52, yc=1/2, yi=49, yn=49] [L40] CALL, EXPR y(i) VAL [\old(i)=0, \old(yn)=49, yn=49] [L18] yn += ui [L19] return yn; VAL [\old(i)=0, \old(yn)=49, \result=51, i=0, yn=51] [L40] RET, EXPR y(i) VAL [epi=52, i=0, K=1/2, sumej=52, y(i)=51, yc=1/2, yi=49, yn=51] [L40] yi = y(i) [L41] ei = yc-yi [L42] sumej = sumej+ei [L43] ui = K*(ei+sumej*T/taui+taud/T*(ei-epi)) [L44] epi = ei [L46] CALL __VERIFIER_assert(epi >= -1. && epi <= 1.) [L8] COND TRUE !(cond) VAL [\old(cond)=0, cond=0, yn=51] [L8] reach_error() VAL [\old(cond)=0, cond=0, yn=51] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 19 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.2s, OverallIterations: 1, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 15 NumberOfCodeBlocks, 15 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-07-12 02:39:15,995 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/float-benchs/water_pid.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 934622c50be6b43827f31f94ee6f464812ea7c1827ffb5fb855e650934cdada0 --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 02:39:17,778 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 02:39:17,781 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 02:39:17,814 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 02:39:17,815 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 02:39:17,816 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 02:39:17,821 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 02:39:17,825 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 02:39:17,826 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 02:39:17,839 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 02:39:17,840 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 02:39:17,842 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 02:39:17,843 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 02:39:17,844 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 02:39:17,846 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 02:39:17,850 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 02:39:17,851 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 02:39:17,852 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 02:39:17,854 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 02:39:17,858 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 02:39:17,860 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 02:39:17,860 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 02:39:17,862 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 02:39:17,863 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 02:39:17,864 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 02:39:17,870 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 02:39:17,872 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 02:39:17,872 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 02:39:17,873 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 02:39:17,874 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 02:39:17,874 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 02:39:17,875 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 02:39:17,876 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 02:39:17,877 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 02:39:17,878 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 02:39:17,879 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 02:39:17,879 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 02:39:17,880 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 02:39:17,880 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 02:39:17,880 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 02:39:17,881 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 02:39:17,882 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 02:39:17,895 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2022-07-12 02:39:17,916 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 02:39:17,917 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 02:39:17,917 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 02:39:17,917 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 02:39:17,918 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 02:39:17,918 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 02:39:17,919 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 02:39:17,919 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 02:39:17,920 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 02:39:17,920 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 02:39:17,921 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 02:39:17,921 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 02:39:17,921 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 02:39:17,921 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-12 02:39:17,921 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 02:39:17,922 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-12 02:39:17,922 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-12 02:39:17,922 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-12 02:39:17,922 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-12 02:39:17,922 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 02:39:17,923 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-12 02:39:17,923 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 02:39:17,923 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-12 02:39:17,923 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 02:39:17,923 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 02:39:17,924 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 02:39:17,924 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 02:39:17,924 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 02:39:17,924 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 02:39:17,924 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-12 02:39:17,925 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-12 02:39:17,925 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-12 02:39:17,925 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-12 02:39:17,925 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-12 02:39:17,926 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-12 02:39:17,926 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-12 02:39:17,926 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 934622c50be6b43827f31f94ee6f464812ea7c1827ffb5fb855e650934cdada0 [2022-07-12 02:39:18,205 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 02:39:18,225 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 02:39:18,228 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 02:39:18,229 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 02:39:18,230 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 02:39:18,232 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/water_pid.c [2022-07-12 02:39:18,291 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6acacf232/c75a98d142a24d4394c310471fb3bae5/FLAG30c70815d [2022-07-12 02:39:18,662 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 02:39:18,663 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/water_pid.c [2022-07-12 02:39:18,667 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6acacf232/c75a98d142a24d4394c310471fb3bae5/FLAG30c70815d [2022-07-12 02:39:19,103 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6acacf232/c75a98d142a24d4394c310471fb3bae5 [2022-07-12 02:39:19,105 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 02:39:19,107 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 02:39:19,108 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 02:39:19,108 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 02:39:19,110 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 02:39:19,113 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 02:39:19" (1/1) ... [2022-07-12 02:39:19,114 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72671043 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 02:39:19, skipping insertion in model container [2022-07-12 02:39:19,115 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 02:39:19" (1/1) ... [2022-07-12 02:39:19,120 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 02:39:19,131 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 02:39:19,242 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/water_pid.c[452,465] [2022-07-12 02:39:19,254 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 02:39:19,262 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 02:39:19,270 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/water_pid.c[452,465] [2022-07-12 02:39:19,280 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 02:39:19,330 INFO L208 MainTranslator]: Completed translation [2022-07-12 02:39:19,330 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 02:39:19 WrapperNode [2022-07-12 02:39:19,330 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 02:39:19,331 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 02:39:19,331 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 02:39:19,331 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 02:39:19,337 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 02:39:19" (1/1) ... [2022-07-12 02:39:19,344 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 02:39:19" (1/1) ... [2022-07-12 02:39:19,363 INFO L137 Inliner]: procedures = 14, calls = 10, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 57 [2022-07-12 02:39:19,364 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 02:39:19,364 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 02:39:19,365 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 02:39:19,365 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 02:39:19,372 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 02:39:19" (1/1) ... [2022-07-12 02:39:19,373 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 02:39:19" (1/1) ... [2022-07-12 02:39:19,380 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 02:39:19" (1/1) ... [2022-07-12 02:39:19,382 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 02:39:19" (1/1) ... [2022-07-12 02:39:19,392 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 02:39:19" (1/1) ... [2022-07-12 02:39:19,395 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 02:39:19" (1/1) ... [2022-07-12 02:39:19,396 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 02:39:19" (1/1) ... [2022-07-12 02:39:19,398 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 02:39:19,398 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 02:39:19,398 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 02:39:19,399 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 02:39:19,403 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 02:39:19" (1/1) ... [2022-07-12 02:39:19,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 02:39:19,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 02:39:19,433 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-12 02:39:19,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-12 02:39:19,473 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 02:39:19,474 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-07-12 02:39:19,474 INFO L130 BoogieDeclarations]: Found specification of procedure y [2022-07-12 02:39:19,474 INFO L138 BoogieDeclarations]: Found implementation of procedure y [2022-07-12 02:39:19,474 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 02:39:19,474 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 02:39:19,538 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 02:39:19,540 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 02:39:23,057 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 02:39:23,062 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 02:39:23,062 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-12 02:39:23,064 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 02:39:23 BoogieIcfgContainer [2022-07-12 02:39:23,065 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 02:39:23,066 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 02:39:23,066 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 02:39:23,069 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 02:39:23,069 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 02:39:19" (1/3) ... [2022-07-12 02:39:23,070 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@496af5fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 02:39:23, skipping insertion in model container [2022-07-12 02:39:23,070 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 02:39:19" (2/3) ... [2022-07-12 02:39:23,070 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@496af5fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 02:39:23, skipping insertion in model container [2022-07-12 02:39:23,070 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 02:39:23" (3/3) ... [2022-07-12 02:39:23,071 INFO L111 eAbstractionObserver]: Analyzing ICFG water_pid.c [2022-07-12 02:39:23,081 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 02:39:23,081 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-12 02:39:23,118 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 02:39:23,124 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@7ae26837, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@9317ff7 [2022-07-12 02:39:23,124 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-12 02:39:23,128 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 15 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 02:39:23,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-12 02:39:23,134 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 02:39:23,134 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 02:39:23,135 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 02:39:23,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 02:39:23,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1533419321, now seen corresponding path program 1 times [2022-07-12 02:39:23,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 02:39:23,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [59668628] [2022-07-12 02:39:23,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 02:39:23,151 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 02:39:23,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 02:39:23,153 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 02:39:23,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-12 02:39:25,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 02:39:25,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-12 02:39:25,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 02:39:33,487 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 02:39:33,487 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 02:39:33,487 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 02:39:33,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [59668628] [2022-07-12 02:39:33,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [59668628] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 02:39:33,488 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 02:39:33,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-12 02:39:33,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575749702] [2022-07-12 02:39:33,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 02:39:33,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-12 02:39:33,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 02:39:33,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-12 02:39:33,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-12 02:39:33,511 INFO L87 Difference]: Start difference. First operand has 19 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 15 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 9 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 6 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-12 02:39:40,517 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.89s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-12 02:39:46,581 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.96s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-12 02:39:48,592 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-12 02:39:50,600 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-12 02:39:52,621 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-12 02:39:54,633 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-12 02:39:59,458 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.98s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-12 02:40:01,466 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-12 02:40:03,478 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-12 02:40:05,497 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-12 02:40:07,511 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-12 02:40:07,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 02:40:07,512 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2022-07-12 02:40:08,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 02:40:08,284 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 6 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 15 [2022-07-12 02:40:08,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 02:40:08,288 INFO L225 Difference]: With dead ends: 54 [2022-07-12 02:40:08,288 INFO L226 Difference]: Without dead ends: 27 [2022-07-12 02:40:08,290 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-07-12 02:40:08,292 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 21 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 9 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32.1s IncrementalHoareTripleChecker+Time [2022-07-12 02:40:08,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 102 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 45 Invalid, 11 Unknown, 0 Unchecked, 32.1s Time] [2022-07-12 02:40:08,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-07-12 02:40:08,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2022-07-12 02:40:08,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 16 states have (on average 1.0625) internal successors, (17), 16 states have internal predecessors, (17), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-12 02:40:08,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2022-07-12 02:40:08,322 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 15 [2022-07-12 02:40:08,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 02:40:08,322 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2022-07-12 02:40:08,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 6 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-12 02:40:08,323 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2022-07-12 02:40:08,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-12 02:40:08,324 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 02:40:08,325 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 02:40:08,389 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-07-12 02:40:08,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 02:40:08,528 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 02:40:08,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 02:40:08,528 INFO L85 PathProgramCache]: Analyzing trace with hash -888289639, now seen corresponding path program 1 times [2022-07-12 02:40:08,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 02:40:08,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [556981590] [2022-07-12 02:40:08,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 02:40:08,529 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 02:40:08,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 02:40:08,531 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 02:40:08,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-12 02:40:12,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 02:40:12,719 WARN L261 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-12 02:40:12,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 02:41:15,435 WARN L233 SmtUtils]: Spent 13.24s on a formula simplification that was a NOOP. DAG size: 29 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-12 02:42:28,987 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) c_currentRoundingMode (/ 1.0 2.0)))) (and (= (let ((.cse6 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32)))) (let ((.cse5 (fp.add c_currentRoundingMode .cse6 .cse6))) (let ((.cse0 (fp.add c_currentRoundingMode .cse5 .cse6))) (fp.add c_currentRoundingMode .cse0 (fp.mul c_currentRoundingMode .cse1 (let ((.cse4 ((_ to_fp 11 53) c_currentRoundingMode (_ bv1 32))) (.cse2 (fp.sub c_currentRoundingMode |c_ULTIMATE.start_main_~yc~0#1| .cse0)) (.cse3 (fp.sub c_currentRoundingMode |c_ULTIMATE.start_main_~yc~0#1| .cse5))) (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode .cse2 (fp.div c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.add c_currentRoundingMode .cse3 .cse2) .cse4) .cse4)) (fp.mul c_currentRoundingMode (fp.div c_currentRoundingMode .cse4 .cse4) (fp.sub c_currentRoundingMode .cse2 .cse3))))))))) |c_ULTIMATE.start_main_#t~ret6#1|) (= |c_ULTIMATE.start_main_~yc~0#1| .cse1) (= c_currentRoundingMode roundNearestTiesToEven))) is different from true [2022-07-12 02:42:32,012 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 6 refuted. 3 times theorem prover too weak. 3 trivial. 1 not checked. [2022-07-12 02:42:32,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 02:42:56,678 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse0 (fp.sub c_currentRoundingMode |c_ULTIMATE.start_main_~yc~0#1| (fp.add c_currentRoundingMode c_~yn~0 c_~ui~0))) (.cse1 ((_ to_fp 11 53) c_currentRoundingMode 1.0))) (and (fp.leq .cse0 .cse1) (fp.geq .cse0 (fp.neg .cse1)))) is different from true [2022-07-12 02:43:23,592 WARN L855 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_main_~yc~0#1_BEFORE_CALL_6| (_ FloatingPoint 11 53))) (let ((.cse1 (fp.sub c_currentRoundingMode |v_ULTIMATE.start_main_~yc~0#1_BEFORE_CALL_6| (fp.add c_currentRoundingMode |c_old(~yn~0)| c_~ui~0))) (.cse0 ((_ to_fp 11 53) c_currentRoundingMode 1.0))) (or (fp.leq (fp.sub c_currentRoundingMode |v_ULTIMATE.start_main_~yc~0#1_BEFORE_CALL_6| |c_y_#res|) .cse0) (not (fp.geq .cse1 (fp.neg .cse0))) (not (fp.leq .cse1 .cse0))))) (forall ((|v_ULTIMATE.start_main_~yc~0#1_BEFORE_CALL_6| (_ FloatingPoint 11 53))) (let ((.cse4 ((_ to_fp 11 53) c_currentRoundingMode 1.0))) (let ((.cse2 (fp.neg .cse4)) (.cse3 (fp.sub c_currentRoundingMode |v_ULTIMATE.start_main_~yc~0#1_BEFORE_CALL_6| (fp.add c_currentRoundingMode |c_old(~yn~0)| c_~ui~0)))) (or (fp.geq (fp.sub c_currentRoundingMode |v_ULTIMATE.start_main_~yc~0#1_BEFORE_CALL_6| |c_y_#res|) .cse2) (not (fp.geq .cse3 .cse2)) (not (fp.leq .cse3 .cse4))))))) is different from true