./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 35987657 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-?-3598765 [2022-07-21 01:24:05,376 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 01:24:05,378 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 01:24:05,417 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 01:24:05,417 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 01:24:05,418 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 01:24:05,421 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 01:24:05,423 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 01:24:05,425 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 01:24:05,428 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 01:24:05,429 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 01:24:05,432 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 01:24:05,432 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 01:24:05,434 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 01:24:05,435 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 01:24:05,437 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 01:24:05,437 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 01:24:05,438 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 01:24:05,439 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 01:24:05,443 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 01:24:05,444 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 01:24:05,445 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 01:24:05,446 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 01:24:05,447 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 01:24:05,448 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 01:24:05,453 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 01:24:05,453 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 01:24:05,453 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 01:24:05,454 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 01:24:05,454 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 01:24:05,455 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 01:24:05,456 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 01:24:05,457 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 01:24:05,457 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 01:24:05,458 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 01:24:05,459 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 01:24:05,459 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 01:24:05,460 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 01:24:05,460 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 01:24:05,460 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 01:24:05,460 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 01:24:05,461 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 01:24:05,465 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 01:24:05,490 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 01:24:05,491 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 01:24:05,491 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 01:24:05,491 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 01:24:05,492 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 01:24:05,492 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 01:24:05,493 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 01:24:05,493 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 01:24:05,493 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 01:24:05,494 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 01:24:05,494 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 01:24:05,494 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 01:24:05,494 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 01:24:05,494 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 01:24:05,494 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 01:24:05,495 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 01:24:05,495 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 01:24:05,495 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 01:24:05,495 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 01:24:05,495 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 01:24:05,495 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 01:24:05,496 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 01:24:05,496 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 01:24:05,496 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 01:24:05,496 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 01:24:05,496 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 01:24:05,496 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 01:24:05,496 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 01:24:05,497 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 01:24:05,497 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 01:24:05,497 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 01:24:05,497 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 01:24:05,497 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 01:24:05,497 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 934622c50be6b43827f31f94ee6f464812ea7c1827ffb5fb855e650934cdada0 [2022-07-21 01:24:05,783 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 01:24:05,798 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 01:24:05,800 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 01:24:05,801 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 01:24:05,801 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 01:24:05,802 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/water_pid.c [2022-07-21 01:24:05,867 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/28e225c8f/6ead296597bf48b3855749bf797aa086/FLAG074ce8210 [2022-07-21 01:24:06,298 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 01:24:06,299 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/water_pid.c [2022-07-21 01:24:06,303 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/28e225c8f/6ead296597bf48b3855749bf797aa086/FLAG074ce8210 [2022-07-21 01:24:06,312 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/28e225c8f/6ead296597bf48b3855749bf797aa086 [2022-07-21 01:24:06,314 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 01:24:06,315 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 01:24:06,317 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 01:24:06,317 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 01:24:06,319 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 01:24:06,320 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:24:06" (1/1) ... [2022-07-21 01:24:06,320 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c9c3161 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:24:06, skipping insertion in model container [2022-07-21 01:24:06,321 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:24:06" (1/1) ... [2022-07-21 01:24:06,325 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 01:24:06,337 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 01:24:06,419 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] [2022-07-21 01:24:06,431 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 01:24:06,436 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 01:24:06,445 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] [2022-07-21 01:24:06,457 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 01:24:06,476 INFO L208 MainTranslator]: Completed translation [2022-07-21 01:24:06,477 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:24:06 WrapperNode [2022-07-21 01:24:06,479 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 01:24:06,480 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 01:24:06,480 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 01:24:06,480 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 01:24:06,504 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:24:06" (1/1) ... [2022-07-21 01:24:06,509 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:24:06" (1/1) ... [2022-07-21 01:24:06,523 INFO L137 Inliner]: procedures = 13, calls = 10, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 56 [2022-07-21 01:24:06,523 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 01:24:06,524 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 01:24:06,525 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 01:24:06,525 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 01:24:06,529 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:24:06" (1/1) ... [2022-07-21 01:24:06,530 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:24:06" (1/1) ... [2022-07-21 01:24:06,537 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:24:06" (1/1) ... [2022-07-21 01:24:06,537 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:24:06" (1/1) ... [2022-07-21 01:24:06,541 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:24:06" (1/1) ... [2022-07-21 01:24:06,543 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:24:06" (1/1) ... [2022-07-21 01:24:06,544 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:24:06" (1/1) ... [2022-07-21 01:24:06,545 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 01:24:06,545 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 01:24:06,546 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 01:24:06,546 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 01:24:06,546 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:24:06" (1/1) ... [2022-07-21 01:24:06,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 01:24:06,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 01:24:06,583 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) [2022-07-21 01:24:06,623 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 [2022-07-21 01:24:06,629 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 01:24:06,629 INFO L130 BoogieDeclarations]: Found specification of procedure y [2022-07-21 01:24:06,629 INFO L138 BoogieDeclarations]: Found implementation of procedure y [2022-07-21 01:24:06,630 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 01:24:06,630 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 01:24:06,630 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 01:24:06,680 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 01:24:06,681 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 01:24:06,837 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 01:24:06,841 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 01:24:06,842 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-21 01:24:06,843 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:24:06 BoogieIcfgContainer [2022-07-21 01:24:06,843 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 01:24:06,844 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 01:24:06,844 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 01:24:06,849 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 01:24:06,849 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 01:24:06" (1/3) ... [2022-07-21 01:24:06,850 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bd67286 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:24:06, skipping insertion in model container [2022-07-21 01:24:06,850 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:24:06" (2/3) ... [2022-07-21 01:24:06,851 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bd67286 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:24:06, skipping insertion in model container [2022-07-21 01:24:06,851 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:24:06" (3/3) ... [2022-07-21 01:24:06,852 INFO L111 eAbstractionObserver]: Analyzing ICFG water_pid.c [2022-07-21 01:24:06,861 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 01:24:06,870 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 01:24:06,915 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 01:24:06,922 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@7717f73e, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@51874c33 [2022-07-21 01:24:06,922 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-21 01:24:06,932 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) [2022-07-21 01:24:06,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-21 01:24:06,940 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 01:24:06,941 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 01:24:06,941 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 01:24:06,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 01:24:06,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1533419321, now seen corresponding path program 1 times [2022-07-21 01:24:06,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 01:24:06,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901153641] [2022-07-21 01:24:06,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 01:24:06,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 01:24:07,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 01:24:07,056 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 01:24:07,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 01:24:07,082 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 01:24:07,085 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 01:24:07,086 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-07-21 01:24:07,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 01:24:07,090 INFO L356 BasicCegarLoop]: Path program histogram: [1] [2022-07-21 01:24:07,093 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-21 01:24:07,115 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 01:24:07 BoogieIcfgContainer [2022-07-21 01:24:07,116 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-21 01:24:07,117 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-21 01:24:07,117 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-21 01:24:07,118 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-21 01:24:07,118 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:24:06" (3/4) ... [2022-07-21 01:24:07,120 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-07-21 01:24:07,121 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-21 01:24:07,122 INFO L158 Benchmark]: Toolchain (without parser) took 806.69ms. Allocated memory was 69.2MB in the beginning and 98.6MB in the end (delta: 29.4MB). Free memory was 52.3MB in the beginning and 77.2MB in the end (delta: -24.9MB). Peak memory consumption was 4.6MB. Max. memory is 16.1GB. [2022-07-21 01:24:07,122 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 69.2MB. Free memory is still 51.5MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-21 01:24:07,123 INFO L158 Benchmark]: CACSL2BoogieTranslator took 162.23ms. Allocated memory is still 69.2MB. Free memory was 52.1MB in the beginning and 53.7MB in the end (delta: -1.6MB). Peak memory consumption was 13.7MB. Max. memory is 16.1GB. [2022-07-21 01:24:07,124 INFO L158 Benchmark]: Boogie Procedure Inliner took 43.84ms. Allocated memory is still 69.2MB. Free memory was 53.7MB in the beginning and 52.0MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-21 01:24:07,125 INFO L158 Benchmark]: Boogie Preprocessor took 20.59ms. Allocated memory is still 69.2MB. Free memory was 52.0MB in the beginning and 51.0MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-21 01:24:07,125 INFO L158 Benchmark]: RCFGBuilder took 297.64ms. Allocated memory is still 69.2MB. Free memory was 51.0MB in the beginning and 41.9MB in the end (delta: 9.0MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-07-21 01:24:07,126 INFO L158 Benchmark]: TraceAbstraction took 271.42ms. Allocated memory was 69.2MB in the beginning and 98.6MB in the end (delta: 29.4MB). Free memory was 41.3MB in the beginning and 77.7MB in the end (delta: -36.4MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-21 01:24:07,126 INFO L158 Benchmark]: Witness Printer took 3.46ms. Allocated memory is still 98.6MB. Free memory was 77.7MB in the beginning and 77.2MB in the end (delta: 452.5kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-21 01:24:07,133 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 69.2MB. Free memory is still 51.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 162.23ms. Allocated memory is still 69.2MB. Free memory was 52.1MB in the beginning and 53.7MB in the end (delta: -1.6MB). Peak memory consumption was 13.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 43.84ms. Allocated memory is still 69.2MB. Free memory was 53.7MB in the beginning and 52.0MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 20.59ms. Allocated memory is still 69.2MB. Free memory was 52.0MB in the beginning and 51.0MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 297.64ms. Allocated memory is still 69.2MB. Free memory was 51.0MB in the beginning and 41.9MB in the end (delta: 9.0MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * TraceAbstraction took 271.42ms. Allocated memory was 69.2MB in the beginning and 98.6MB in the end (delta: 29.4MB). Free memory was 41.3MB in the beginning and 77.7MB in the end (delta: -36.4MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 3.46ms. Allocated memory is still 98.6MB. Free memory was 77.7MB in the beginning and 77.2MB in the end (delta: 452.5kB). 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 [2022-07-21 01:24:07,168 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/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-?-3598765 [2022-07-21 01:24:08,931 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 01:24:08,933 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 01:24:08,973 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 01:24:08,973 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 01:24:08,974 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 01:24:08,977 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 01:24:08,980 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 01:24:08,981 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 01:24:08,985 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 01:24:08,986 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 01:24:08,987 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 01:24:08,987 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 01:24:08,989 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 01:24:08,990 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 01:24:08,994 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 01:24:08,994 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 01:24:08,995 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 01:24:08,997 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 01:24:09,001 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 01:24:09,002 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 01:24:09,003 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 01:24:09,004 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 01:24:09,005 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 01:24:09,006 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 01:24:09,011 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 01:24:09,011 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 01:24:09,012 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 01:24:09,012 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 01:24:09,013 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 01:24:09,013 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 01:24:09,014 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 01:24:09,015 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 01:24:09,016 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 01:24:09,017 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 01:24:09,017 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 01:24:09,017 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 01:24:09,018 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 01:24:09,018 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 01:24:09,018 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 01:24:09,019 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 01:24:09,020 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 01:24:09,022 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2022-07-21 01:24:09,049 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 01:24:09,050 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 01:24:09,050 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 01:24:09,050 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 01:24:09,051 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 01:24:09,051 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 01:24:09,051 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 01:24:09,052 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 01:24:09,052 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 01:24:09,053 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 01:24:09,053 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 01:24:09,053 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 01:24:09,053 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 01:24:09,053 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 01:24:09,053 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 01:24:09,053 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 01:24:09,054 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-21 01:24:09,054 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-21 01:24:09,054 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-21 01:24:09,054 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 01:24:09,054 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 01:24:09,054 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 01:24:09,055 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 01:24:09,055 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 01:24:09,055 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 01:24:09,055 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 01:24:09,055 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 01:24:09,055 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 01:24:09,055 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 01:24:09,056 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 01:24:09,056 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-21 01:24:09,056 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-21 01:24:09,056 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 01:24:09,056 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 01:24:09,057 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 01:24:09,057 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-21 01:24:09,057 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 934622c50be6b43827f31f94ee6f464812ea7c1827ffb5fb855e650934cdada0 [2022-07-21 01:24:09,329 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 01:24:09,348 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 01:24:09,350 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 01:24:09,351 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 01:24:09,352 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 01:24:09,353 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/water_pid.c [2022-07-21 01:24:09,398 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/26bd40e8f/6b37ea6d726d49c6a7ac7d8ec2a4a85d/FLAG3a4303533 [2022-07-21 01:24:09,708 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 01:24:09,708 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/water_pid.c [2022-07-21 01:24:09,714 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/26bd40e8f/6b37ea6d726d49c6a7ac7d8ec2a4a85d/FLAG3a4303533 [2022-07-21 01:24:10,125 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/26bd40e8f/6b37ea6d726d49c6a7ac7d8ec2a4a85d [2022-07-21 01:24:10,127 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 01:24:10,128 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 01:24:10,129 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 01:24:10,129 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 01:24:10,132 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 01:24:10,132 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:24:10" (1/1) ... [2022-07-21 01:24:10,133 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64d6eb7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:24:10, skipping insertion in model container [2022-07-21 01:24:10,133 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:24:10" (1/1) ... [2022-07-21 01:24:10,138 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 01:24:10,148 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 01:24:10,233 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] [2022-07-21 01:24:10,246 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 01:24:10,254 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 01:24:10,262 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] [2022-07-21 01:24:10,266 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 01:24:10,306 INFO L208 MainTranslator]: Completed translation [2022-07-21 01:24:10,307 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:24:10 WrapperNode [2022-07-21 01:24:10,307 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 01:24:10,308 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 01:24:10,308 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 01:24:10,308 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 01:24:10,313 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:24:10" (1/1) ... [2022-07-21 01:24:10,319 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:24:10" (1/1) ... [2022-07-21 01:24:10,331 INFO L137 Inliner]: procedures = 14, calls = 10, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 57 [2022-07-21 01:24:10,332 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 01:24:10,332 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 01:24:10,332 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 01:24:10,333 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 01:24:10,337 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:24:10" (1/1) ... [2022-07-21 01:24:10,338 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:24:10" (1/1) ... [2022-07-21 01:24:10,340 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:24:10" (1/1) ... [2022-07-21 01:24:10,340 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:24:10" (1/1) ... [2022-07-21 01:24:10,344 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:24:10" (1/1) ... [2022-07-21 01:24:10,347 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:24:10" (1/1) ... [2022-07-21 01:24:10,348 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:24:10" (1/1) ... [2022-07-21 01:24:10,350 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 01:24:10,351 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 01:24:10,351 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 01:24:10,351 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 01:24:10,352 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:24:10" (1/1) ... [2022-07-21 01:24:10,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 01:24:10,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 01:24:10,387 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) [2022-07-21 01:24:10,453 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 [2022-07-21 01:24:10,465 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 01:24:10,465 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-07-21 01:24:10,465 INFO L130 BoogieDeclarations]: Found specification of procedure y [2022-07-21 01:24:10,467 INFO L138 BoogieDeclarations]: Found implementation of procedure y [2022-07-21 01:24:10,467 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 01:24:10,467 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 01:24:10,525 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 01:24:10,527 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 01:24:13,944 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 01:24:13,948 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 01:24:13,948 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-21 01:24:13,950 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:24:13 BoogieIcfgContainer [2022-07-21 01:24:13,950 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 01:24:13,951 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 01:24:13,951 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 01:24:13,963 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 01:24:13,963 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 01:24:10" (1/3) ... [2022-07-21 01:24:13,963 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e392b8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:24:13, skipping insertion in model container [2022-07-21 01:24:13,964 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:24:10" (2/3) ... [2022-07-21 01:24:13,964 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e392b8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:24:13, skipping insertion in model container [2022-07-21 01:24:13,964 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:24:13" (3/3) ... [2022-07-21 01:24:13,965 INFO L111 eAbstractionObserver]: Analyzing ICFG water_pid.c [2022-07-21 01:24:13,974 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 01:24:13,974 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 01:24:14,004 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 01:24:14,009 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@7ef55829, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@37cf7ae4 [2022-07-21 01:24:14,009 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-21 01:24:14,012 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) [2022-07-21 01:24:14,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-21 01:24:14,017 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 01:24:14,017 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 01:24:14,018 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 01:24:14,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 01:24:14,042 INFO L85 PathProgramCache]: Analyzing trace with hash -1533419321, now seen corresponding path program 1 times [2022-07-21 01:24:14,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 01:24:14,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [128959776] [2022-07-21 01:24:14,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 01:24:14,052 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 01:24:14,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 01:24:14,054 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) [2022-07-21 01:24:14,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-21 01:24:16,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 01:24:16,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-21 01:24:16,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 01:24:23,841 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 01:24:23,842 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 01:24:23,842 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 01:24:23,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [128959776] [2022-07-21 01:24:23,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [128959776] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 01:24:23,843 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 01:24:23,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-21 01:24:23,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639109913] [2022-07-21 01:24:23,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 01:24:23,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 01:24:23,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 01:24:23,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 01:24:23,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-21 01:24:23,872 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) [2022-07-21 01:24:30,502 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 [] [2022-07-21 01:24:35,898 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.83s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-21 01:24:37,906 WARN L534 Checker$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 [] [2022-07-21 01:24:39,921 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-21 01:24:41,927 WARN L534 Checker$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 [] [2022-07-21 01:24:43,947 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-21 01:24:48,582 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.88s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-21 01:24:50,592 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-21 01:24:52,614 WARN L534 Checker$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 [] [2022-07-21 01:24:54,626 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-21 01:24:56,630 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-21 01:24:56,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 01:24:56,630 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2022-07-21 01:24:57,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 01:24:57,358 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 [2022-07-21 01:24:57,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 01:24:57,362 INFO L225 Difference]: With dead ends: 54 [2022-07-21 01:24:57,362 INFO L226 Difference]: Without dead ends: 27 [2022-07-21 01:24:57,367 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-07-21 01:24:57,369 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 21 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 9 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.5s 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, 31.1s IncrementalHoareTripleChecker+Time [2022-07-21 01:24:57,370 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 102 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 45 Invalid, 11 Unknown, 0 Unchecked, 31.1s Time] [2022-07-21 01:24:57,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-07-21 01:24:57,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2022-07-21 01:24:57,393 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) [2022-07-21 01:24:57,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2022-07-21 01:24:57,395 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 15 [2022-07-21 01:24:57,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 01:24:57,395 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2022-07-21 01:24:57,396 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) [2022-07-21 01:24:57,396 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2022-07-21 01:24:57,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-21 01:24:57,397 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 01:24:57,397 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 01:24:57,474 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-07-21 01:24:57,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 01:24:57,612 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 01:24:57,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 01:24:57,612 INFO L85 PathProgramCache]: Analyzing trace with hash -888289639, now seen corresponding path program 1 times [2022-07-21 01:24:57,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 01:24:57,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [700109956] [2022-07-21 01:24:57,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 01:24:57,613 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 01:24:57,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 01:24:57,615 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) [2022-07-21 01:24:57,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-21 01:25:01,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 01:25:01,912 WARN L261 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-21 01:25:01,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 01:26:07,207 WARN L233 SmtUtils]: Spent 13.37s 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) [2022-07-21 01:27:22,906 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 [2022-07-21 01:27:25,885 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 6 refuted. 3 times theorem prover too weak. 3 trivial. 1 not checked. [2022-07-21 01:27:25,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 01:28:22,798 WARN L233 SmtUtils]: Spent 9.40s on a formula simplification that was a NOOP. DAG size: 12 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)