./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 eb692b52 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/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-?-eb692b5 [2022-07-19 13:48:17,120 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 13:48:17,122 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 13:48:17,169 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 13:48:17,170 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 13:48:17,171 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 13:48:17,173 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 13:48:17,176 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 13:48:17,177 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 13:48:17,181 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 13:48:17,182 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 13:48:17,184 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 13:48:17,184 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 13:48:17,186 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 13:48:17,187 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 13:48:17,190 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 13:48:17,190 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 13:48:17,192 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 13:48:17,193 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 13:48:17,200 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 13:48:17,201 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 13:48:17,202 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 13:48:17,203 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 13:48:17,204 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 13:48:17,205 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 13:48:17,208 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 13:48:17,208 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 13:48:17,208 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 13:48:17,209 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 13:48:17,210 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 13:48:17,211 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 13:48:17,211 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 13:48:17,212 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 13:48:17,213 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 13:48:17,213 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 13:48:17,214 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 13:48:17,214 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 13:48:17,215 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 13:48:17,215 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 13:48:17,215 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 13:48:17,217 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 13:48:17,218 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 13:48:17,219 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 13:48:17,250 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 13:48:17,250 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 13:48:17,251 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 13:48:17,251 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 13:48:17,252 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 13:48:17,252 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 13:48:17,252 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 13:48:17,252 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 13:48:17,253 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 13:48:17,254 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 13:48:17,254 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 13:48:17,254 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 13:48:17,254 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 13:48:17,254 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 13:48:17,255 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 13:48:17,255 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 13:48:17,259 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 13:48:17,259 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 13:48:17,259 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 13:48:17,261 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 13:48:17,261 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 13:48:17,261 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 13:48:17,261 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 13:48:17,262 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 13:48:17,262 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 13:48:17,262 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 13:48:17,262 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 13:48:17,262 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 13:48:17,263 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 13:48:17,263 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 13:48:17,263 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 13:48:17,263 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 13:48:17,263 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 13:48:17,264 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 934622c50be6b43827f31f94ee6f464812ea7c1827ffb5fb855e650934cdada0 [2022-07-19 13:48:17,458 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 13:48:17,481 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 13:48:17,483 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 13:48:17,485 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 13:48:17,486 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 13:48:17,487 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/water_pid.c [2022-07-19 13:48:17,563 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/601967045/2baa84cf01c04b3ab96176d8b28c9cb6/FLAGd9c8d33e5 [2022-07-19 13:48:17,899 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 13:48:17,900 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/water_pid.c [2022-07-19 13:48:17,904 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/601967045/2baa84cf01c04b3ab96176d8b28c9cb6/FLAGd9c8d33e5 [2022-07-19 13:48:18,336 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/601967045/2baa84cf01c04b3ab96176d8b28c9cb6 [2022-07-19 13:48:18,338 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 13:48:18,339 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 13:48:18,341 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 13:48:18,341 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 13:48:18,343 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 13:48:18,343 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 01:48:18" (1/1) ... [2022-07-19 13:48:18,344 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41d226e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 01:48:18, skipping insertion in model container [2022-07-19 13:48:18,344 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 01:48:18" (1/1) ... [2022-07-19 13:48:18,349 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 13:48:18,360 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 13:48:18,485 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] [2022-07-19 13:48:18,508 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 13:48:18,516 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 13:48:18,529 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] [2022-07-19 13:48:18,540 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 13:48:18,550 INFO L208 MainTranslator]: Completed translation [2022-07-19 13:48:18,551 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 01:48:18 WrapperNode [2022-07-19 13:48:18,551 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 13:48:18,553 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 13:48:18,553 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 13:48:18,553 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 13:48:18,558 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 01:48:18" (1/1) ... [2022-07-19 13:48:18,564 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 01:48:18" (1/1) ... [2022-07-19 13:48:18,583 INFO L137 Inliner]: procedures = 13, calls = 10, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 56 [2022-07-19 13:48:18,584 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 13:48:18,585 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 13:48:18,585 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 13:48:18,586 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 13:48:18,592 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 01:48:18" (1/1) ... [2022-07-19 13:48:18,593 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 01:48:18" (1/1) ... [2022-07-19 13:48:18,599 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 01:48:18" (1/1) ... [2022-07-19 13:48:18,600 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 01:48:18" (1/1) ... [2022-07-19 13:48:18,603 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 01:48:18" (1/1) ... [2022-07-19 13:48:18,608 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 01:48:18" (1/1) ... [2022-07-19 13:48:18,609 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 01:48:18" (1/1) ... [2022-07-19 13:48:18,616 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 13:48:18,617 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 13:48:18,617 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 13:48:18,617 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 13:48:18,622 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 01:48:18" (1/1) ... [2022-07-19 13:48:18,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 13:48:18,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 13:48:18,652 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-19 13:48:18,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-19 13:48:18,697 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 13:48:18,697 INFO L130 BoogieDeclarations]: Found specification of procedure y [2022-07-19 13:48:18,698 INFO L138 BoogieDeclarations]: Found implementation of procedure y [2022-07-19 13:48:18,698 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 13:48:18,698 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 13:48:18,698 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 13:48:18,751 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 13:48:18,753 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 13:48:18,835 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 13:48:18,840 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 13:48:18,840 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-19 13:48:18,842 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 01:48:18 BoogieIcfgContainer [2022-07-19 13:48:18,842 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 13:48:18,844 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 13:48:18,844 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 13:48:18,847 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 13:48:18,848 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 01:48:18" (1/3) ... [2022-07-19 13:48:18,848 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3de40489 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 01:48:18, skipping insertion in model container [2022-07-19 13:48:18,848 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 01:48:18" (2/3) ... [2022-07-19 13:48:18,849 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3de40489 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 01:48:18, skipping insertion in model container [2022-07-19 13:48:18,849 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 01:48:18" (3/3) ... [2022-07-19 13:48:18,850 INFO L111 eAbstractionObserver]: Analyzing ICFG water_pid.c [2022-07-19 13:48:18,863 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 13:48:18,863 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 13:48:18,910 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 13:48:18,917 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@29f097ca, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5fe138ff [2022-07-19 13:48:18,917 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 13:48:18,921 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) [2022-07-19 13:48:18,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-19 13:48:18,928 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 13:48:18,928 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 13:48:18,929 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 13:48:18,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 13:48:18,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1533419321, now seen corresponding path program 1 times [2022-07-19 13:48:18,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 13:48:18,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728714602] [2022-07-19 13:48:18,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 13:48:18,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 13:48:19,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 13:48:19,025 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 13:48:19,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 13:48:19,056 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 13:48:19,058 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 13:48:19,059 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-07-19 13:48:19,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 13:48:19,065 INFO L356 BasicCegarLoop]: Path program histogram: [1] [2022-07-19 13:48:19,068 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-19 13:48:19,089 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.07 01:48:19 BoogieIcfgContainer [2022-07-19 13:48:19,090 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-19 13:48:19,090 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-19 13:48:19,090 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-19 13:48:19,091 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-19 13:48:19,091 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 01:48:18" (3/4) ... [2022-07-19 13:48:19,093 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-07-19 13:48:19,094 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-19 13:48:19,095 INFO L158 Benchmark]: Toolchain (without parser) took 755.43ms. Allocated memory was 92.3MB in the beginning and 113.2MB in the end (delta: 21.0MB). Free memory was 59.6MB in the beginning and 62.4MB in the end (delta: -2.8MB). Peak memory consumption was 15.8MB. Max. memory is 16.1GB. [2022-07-19 13:48:19,096 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 92.3MB. Free memory was 49.1MB in the beginning and 49.1MB in the end (delta: 39.2kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-19 13:48:19,096 INFO L158 Benchmark]: CACSL2BoogieTranslator took 210.95ms. Allocated memory was 92.3MB in the beginning and 113.2MB in the end (delta: 21.0MB). Free memory was 59.4MB in the beginning and 89.1MB in the end (delta: -29.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-19 13:48:19,097 INFO L158 Benchmark]: Boogie Procedure Inliner took 31.46ms. Allocated memory is still 113.2MB. Free memory was 89.1MB in the beginning and 87.6MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-19 13:48:19,097 INFO L158 Benchmark]: Boogie Preprocessor took 30.90ms. Allocated memory is still 113.2MB. Free memory was 87.6MB in the beginning and 86.5MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-19 13:48:19,098 INFO L158 Benchmark]: RCFGBuilder took 225.55ms. Allocated memory is still 113.2MB. Free memory was 86.5MB in the beginning and 77.1MB in the end (delta: 9.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-19 13:48:19,098 INFO L158 Benchmark]: TraceAbstraction took 245.47ms. Allocated memory is still 113.2MB. Free memory was 76.6MB in the beginning and 62.4MB in the end (delta: 14.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-07-19 13:48:19,099 INFO L158 Benchmark]: Witness Printer took 3.64ms. Allocated memory is still 113.2MB. Free memory is still 62.4MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-19 13:48:19,101 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 92.3MB. Free memory was 49.1MB in the beginning and 49.1MB in the end (delta: 39.2kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 210.95ms. Allocated memory was 92.3MB in the beginning and 113.2MB in the end (delta: 21.0MB). Free memory was 59.4MB in the beginning and 89.1MB in the end (delta: -29.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 31.46ms. Allocated memory is still 113.2MB. Free memory was 89.1MB in the beginning and 87.6MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 30.90ms. Allocated memory is still 113.2MB. Free memory was 87.6MB in the beginning and 86.5MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 225.55ms. Allocated memory is still 113.2MB. Free memory was 86.5MB in the beginning and 77.1MB in the end (delta: 9.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 245.47ms. Allocated memory is still 113.2MB. Free memory was 76.6MB in the beginning and 62.4MB in the end (delta: 14.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Witness Printer took 3.64ms. Allocated memory is still 113.2MB. Free memory is still 62.4MB. 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 [2022-07-19 13:48:19,142 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-?-eb692b5 [2022-07-19 13:48:21,068 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 13:48:21,070 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 13:48:21,094 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 13:48:21,094 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 13:48:21,095 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 13:48:21,096 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 13:48:21,098 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 13:48:21,107 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 13:48:21,108 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 13:48:21,108 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 13:48:21,109 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 13:48:21,110 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 13:48:21,110 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 13:48:21,111 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 13:48:21,112 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 13:48:21,113 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 13:48:21,114 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 13:48:21,115 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 13:48:21,116 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 13:48:21,118 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 13:48:21,123 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 13:48:21,125 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 13:48:21,126 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 13:48:21,128 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 13:48:21,138 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 13:48:21,142 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 13:48:21,143 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 13:48:21,145 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 13:48:21,146 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 13:48:21,146 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 13:48:21,147 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 13:48:21,148 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 13:48:21,148 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 13:48:21,149 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 13:48:21,151 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 13:48:21,151 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 13:48:21,151 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 13:48:21,152 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 13:48:21,152 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 13:48:21,153 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 13:48:21,155 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 13:48:21,160 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2022-07-19 13:48:21,186 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 13:48:21,187 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 13:48:21,187 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 13:48:21,188 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 13:48:21,188 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 13:48:21,189 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 13:48:21,190 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 13:48:21,190 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 13:48:21,190 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 13:48:21,191 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 13:48:21,191 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 13:48:21,192 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 13:48:21,192 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 13:48:21,192 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 13:48:21,192 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 13:48:21,193 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 13:48:21,193 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-19 13:48:21,193 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-19 13:48:21,193 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-19 13:48:21,193 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 13:48:21,194 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 13:48:21,194 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 13:48:21,194 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 13:48:21,194 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 13:48:21,194 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 13:48:21,195 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 13:48:21,195 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 13:48:21,195 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 13:48:21,195 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 13:48:21,196 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 13:48:21,196 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-19 13:48:21,196 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-19 13:48:21,196 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 13:48:21,197 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 13:48:21,197 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 13:48:21,197 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-19 13:48:21,197 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 934622c50be6b43827f31f94ee6f464812ea7c1827ffb5fb855e650934cdada0 [2022-07-19 13:48:21,541 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 13:48:21,567 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 13:48:21,570 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 13:48:21,572 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 13:48:21,572 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 13:48:21,574 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/water_pid.c [2022-07-19 13:48:21,630 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d8776bf68/bb726b2e4c30494d92a0405a30f2200c/FLAG17821c98d [2022-07-19 13:48:22,042 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 13:48:22,043 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/water_pid.c [2022-07-19 13:48:22,050 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d8776bf68/bb726b2e4c30494d92a0405a30f2200c/FLAG17821c98d [2022-07-19 13:48:22,447 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d8776bf68/bb726b2e4c30494d92a0405a30f2200c [2022-07-19 13:48:22,450 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 13:48:22,452 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 13:48:22,454 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 13:48:22,454 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 13:48:22,460 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 13:48:22,461 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 01:48:22" (1/1) ... [2022-07-19 13:48:22,462 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b0fae77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 01:48:22, skipping insertion in model container [2022-07-19 13:48:22,462 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 01:48:22" (1/1) ... [2022-07-19 13:48:22,470 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 13:48:22,484 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 13:48:22,589 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] [2022-07-19 13:48:22,608 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 13:48:22,621 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 13:48:22,635 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] [2022-07-19 13:48:22,654 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 13:48:22,702 INFO L208 MainTranslator]: Completed translation [2022-07-19 13:48:22,702 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 01:48:22 WrapperNode [2022-07-19 13:48:22,702 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 13:48:22,703 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 13:48:22,703 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 13:48:22,704 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 13:48:22,709 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 01:48:22" (1/1) ... [2022-07-19 13:48:22,726 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 01:48:22" (1/1) ... [2022-07-19 13:48:22,746 INFO L137 Inliner]: procedures = 14, calls = 10, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 57 [2022-07-19 13:48:22,747 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 13:48:22,748 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 13:48:22,748 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 13:48:22,748 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 13:48:22,755 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 01:48:22" (1/1) ... [2022-07-19 13:48:22,756 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 01:48:22" (1/1) ... [2022-07-19 13:48:22,764 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 01:48:22" (1/1) ... [2022-07-19 13:48:22,765 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 01:48:22" (1/1) ... [2022-07-19 13:48:22,779 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 01:48:22" (1/1) ... [2022-07-19 13:48:22,784 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 01:48:22" (1/1) ... [2022-07-19 13:48:22,790 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 01:48:22" (1/1) ... [2022-07-19 13:48:22,795 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 13:48:22,797 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 13:48:22,797 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 13:48:22,798 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 13:48:22,798 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 01:48:22" (1/1) ... [2022-07-19 13:48:22,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 13:48:22,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 13:48:22,823 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-19 13:48:22,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-19 13:48:22,875 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 13:48:22,876 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-07-19 13:48:22,876 INFO L130 BoogieDeclarations]: Found specification of procedure y [2022-07-19 13:48:22,876 INFO L138 BoogieDeclarations]: Found implementation of procedure y [2022-07-19 13:48:22,876 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 13:48:22,876 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 13:48:22,939 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 13:48:22,940 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 13:48:26,284 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 13:48:26,288 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 13:48:26,289 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-19 13:48:26,290 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 01:48:26 BoogieIcfgContainer [2022-07-19 13:48:26,290 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 13:48:26,291 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 13:48:26,295 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 13:48:26,298 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 13:48:26,298 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 01:48:22" (1/3) ... [2022-07-19 13:48:26,299 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e241624 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 01:48:26, skipping insertion in model container [2022-07-19 13:48:26,299 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 01:48:22" (2/3) ... [2022-07-19 13:48:26,299 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e241624 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 01:48:26, skipping insertion in model container [2022-07-19 13:48:26,300 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 01:48:26" (3/3) ... [2022-07-19 13:48:26,301 INFO L111 eAbstractionObserver]: Analyzing ICFG water_pid.c [2022-07-19 13:48:26,313 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 13:48:26,313 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 13:48:26,350 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 13:48:26,356 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@3b554db8, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4ba4cb8f [2022-07-19 13:48:26,357 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 13:48:26,371 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) [2022-07-19 13:48:26,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-19 13:48:26,379 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 13:48:26,380 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 13:48:26,381 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 13:48:26,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 13:48:26,386 INFO L85 PathProgramCache]: Analyzing trace with hash -1533419321, now seen corresponding path program 1 times [2022-07-19 13:48:26,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-19 13:48:26,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [159549921] [2022-07-19 13:48:26,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 13:48:26,405 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-19 13:48:26,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-19 13:48:26,411 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-19 13:48:26,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-19 13:48:28,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 13:48:28,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-19 13:48:28,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 13:48:36,300 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 13:48:36,300 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 13:48:36,301 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-19 13:48:36,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [159549921] [2022-07-19 13:48:36,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [159549921] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 13:48:36,301 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 13:48:36,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-19 13:48:36,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537681217] [2022-07-19 13:48:36,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 13:48:36,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-19 13:48:36,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-19 13:48:36,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-19 13:48:36,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-19 13:48:36,338 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) [2022-07-19 13:48:43,064 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.85s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-19 13:48:48,653 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.89s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-19 13:48:50,661 WARN L534 Checker$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 [] [2022-07-19 13:48:52,670 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-19 13:48:54,680 WARN L534 Checker$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 [] [2022-07-19 13:48:56,690 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-19 13:49:01,402 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.90s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-19 13:49:03,409 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-19 13:49:05,415 WARN L534 Checker$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 [] [2022-07-19 13:49:07,452 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-19 13:49:09,480 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-19 13:49:09,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 13:49:09,480 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2022-07-19 13:49:10,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-19 13:49:10,256 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 [2022-07-19 13:49:10,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 13:49:10,260 INFO L225 Difference]: With dead ends: 54 [2022-07-19 13:49:10,260 INFO L226 Difference]: Without dead ends: 27 [2022-07-19 13:49:10,262 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-07-19 13:49:10,265 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 21 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 9 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.7s 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, 31.4s IncrementalHoareTripleChecker+Time [2022-07-19 13:49:10,266 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 102 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 45 Invalid, 11 Unknown, 0 Unchecked, 31.4s Time] [2022-07-19 13:49:10,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-07-19 13:49:10,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2022-07-19 13:49:10,288 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) [2022-07-19 13:49:10,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2022-07-19 13:49:10,290 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 15 [2022-07-19 13:49:10,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 13:49:10,290 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2022-07-19 13:49:10,291 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) [2022-07-19 13:49:10,291 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2022-07-19 13:49:10,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-19 13:49:10,292 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 13:49:10,292 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 13:49:10,350 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-07-19 13:49:10,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-19 13:49:10,507 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 13:49:10,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 13:49:10,508 INFO L85 PathProgramCache]: Analyzing trace with hash -888289639, now seen corresponding path program 1 times [2022-07-19 13:49:10,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-19 13:49:10,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1261548] [2022-07-19 13:49:10,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 13:49:10,509 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-19 13:49:10,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-19 13:49:10,510 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-19 13:49:10,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-19 13:49:14,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 13:49:14,538 WARN L261 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-19 13:49:14,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 13:50:16,340 WARN L233 SmtUtils]: Spent 13.74s 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) [2022-07-19 13:51:31,058 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 [2022-07-19 13:51:34,169 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 6 refuted. 3 times theorem prover too weak. 3 trivial. 1 not checked. [2022-07-19 13:51:34,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 13:53:01,773 WARN L855 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~yc~0#1_BEFORE_CALL_6| (_ FloatingPoint 11 53))) (let ((.cse2 ((_ to_fp 11 53) c_currentRoundingMode 1.0))) (let ((.cse1 (fp.neg .cse2)) (.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 (let ((.cse0 (fp.sub c_currentRoundingMode |v_ULTIMATE.start_main_~yc~0#1_BEFORE_CALL_6| |c_y_#res|))) (and (fp.geq .cse0 .cse1) (fp.leq .cse0 .cse2))) (not (fp.geq .cse3 .cse1)) (not (fp.leq .cse3 .cse2)))))) is different from true