./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7e1ff0e6 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/nla-digbench-scaling/sqrt1-ll_unwindbound20.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 4b6ae28789704f5fd465d11d450ce27cd9b971ac76fe8e36268d0ace5b5b057f --- Real Ultimate output --- This is Ultimate 0.2.2-?-7e1ff0e [2023-02-15 00:45:25,940 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 00:45:25,942 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 00:45:25,977 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 00:45:25,978 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 00:45:25,980 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 00:45:25,981 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 00:45:25,984 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 00:45:25,986 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 00:45:25,989 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 00:45:25,990 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 00:45:25,991 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 00:45:25,992 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 00:45:25,993 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 00:45:25,994 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 00:45:25,995 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 00:45:25,996 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 00:45:25,997 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 00:45:25,998 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 00:45:26,005 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 00:45:26,006 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 00:45:26,007 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 00:45:26,007 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 00:45:26,008 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 00:45:26,013 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 00:45:26,014 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 00:45:26,014 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 00:45:26,016 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 00:45:26,016 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 00:45:26,016 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 00:45:26,017 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 00:45:26,017 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 00:45:26,018 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 00:45:26,019 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 00:45:26,019 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 00:45:26,019 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 00:45:26,020 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 00:45:26,020 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 00:45:26,020 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 00:45:26,020 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 00:45:26,021 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 00:45:26,022 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-15 00:45:26,043 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 00:45:26,043 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 00:45:26,044 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 00:45:26,044 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 00:45:26,045 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 00:45:26,045 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 00:45:26,046 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 00:45:26,046 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 00:45:26,046 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 00:45:26,046 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 00:45:26,047 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 00:45:26,047 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 00:45:26,047 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 00:45:26,047 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 00:45:26,047 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-15 00:45:26,047 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 00:45:26,048 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-15 00:45:26,048 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 00:45:26,048 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 00:45:26,048 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 00:45:26,048 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-15 00:45:26,048 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 00:45:26,048 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 00:45:26,048 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 00:45:26,049 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 00:45:26,049 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 00:45:26,049 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 00:45:26,049 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-15 00:45:26,049 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 00:45:26,049 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 00:45:26,049 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 00:45:26,050 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-15 00:45:26,050 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 00:45:26,050 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 00:45:26,050 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 00:45:26,050 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4b6ae28789704f5fd465d11d450ce27cd9b971ac76fe8e36268d0ace5b5b057f [2023-02-15 00:45:26,243 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 00:45:26,263 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 00:45:26,265 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 00:45:26,266 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 00:45:26,266 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 00:45:26,267 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound20.c [2023-02-15 00:45:27,190 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 00:45:27,322 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 00:45:27,322 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound20.c [2023-02-15 00:45:27,327 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f2150176/c249d742a14e41e3a0e9f2dcf538cedd/FLAG175871baa [2023-02-15 00:45:27,339 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f2150176/c249d742a14e41e3a0e9f2dcf538cedd [2023-02-15 00:45:27,341 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 00:45:27,342 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 00:45:27,343 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 00:45:27,343 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 00:45:27,345 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 00:45:27,346 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 12:45:27" (1/1) ... [2023-02-15 00:45:27,346 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52a5405f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:45:27, skipping insertion in model container [2023-02-15 00:45:27,346 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 12:45:27" (1/1) ... [2023-02-15 00:45:27,351 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 00:45:27,362 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 00:45:27,448 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound20.c[520,533] [2023-02-15 00:45:27,459 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 00:45:27,465 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 00:45:27,472 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound20.c[520,533] [2023-02-15 00:45:27,476 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 00:45:27,484 INFO L208 MainTranslator]: Completed translation [2023-02-15 00:45:27,484 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:45:27 WrapperNode [2023-02-15 00:45:27,484 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 00:45:27,485 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 00:45:27,485 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 00:45:27,485 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 00:45:27,489 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:45:27" (1/1) ... [2023-02-15 00:45:27,493 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:45:27" (1/1) ... [2023-02-15 00:45:27,503 INFO L138 Inliner]: procedures = 14, calls = 13, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 42 [2023-02-15 00:45:27,503 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 00:45:27,503 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 00:45:27,503 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 00:45:27,504 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 00:45:27,508 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:45:27" (1/1) ... [2023-02-15 00:45:27,508 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:45:27" (1/1) ... [2023-02-15 00:45:27,509 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:45:27" (1/1) ... [2023-02-15 00:45:27,509 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:45:27" (1/1) ... [2023-02-15 00:45:27,511 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:45:27" (1/1) ... [2023-02-15 00:45:27,513 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:45:27" (1/1) ... [2023-02-15 00:45:27,513 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:45:27" (1/1) ... [2023-02-15 00:45:27,514 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:45:27" (1/1) ... [2023-02-15 00:45:27,514 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 00:45:27,515 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 00:45:27,515 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 00:45:27,515 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 00:45:27,516 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:45:27" (1/1) ... [2023-02-15 00:45:27,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 00:45:27,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 00:45:27,541 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) [2023-02-15 00:45:27,545 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 [2023-02-15 00:45:27,598 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 00:45:27,601 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 00:45:27,604 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 00:45:27,604 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 00:45:27,604 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-15 00:45:27,604 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-15 00:45:27,640 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 00:45:27,642 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 00:45:27,746 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 00:45:27,750 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 00:45:27,750 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2023-02-15 00:45:27,751 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 12:45:27 BoogieIcfgContainer [2023-02-15 00:45:27,751 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 00:45:27,752 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 00:45:27,752 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 00:45:27,754 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 00:45:27,754 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 12:45:27" (1/3) ... [2023-02-15 00:45:27,755 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b9e068b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 12:45:27, skipping insertion in model container [2023-02-15 00:45:27,755 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:45:27" (2/3) ... [2023-02-15 00:45:27,755 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b9e068b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 12:45:27, skipping insertion in model container [2023-02-15 00:45:27,755 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 12:45:27" (3/3) ... [2023-02-15 00:45:27,756 INFO L112 eAbstractionObserver]: Analyzing ICFG sqrt1-ll_unwindbound20.c [2023-02-15 00:45:27,778 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 00:45:27,779 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-15 00:45:27,809 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 00:45:27,813 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=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1816de2b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 00:45:27,814 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-15 00:45:27,817 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-15 00:45:27,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-15 00:45:27,824 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 00:45:27,824 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-15 00:45:27,825 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 00:45:27,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 00:45:27,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1821846948, now seen corresponding path program 1 times [2023-02-15 00:45:27,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 00:45:27,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212586430] [2023-02-15 00:45:27,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:45:27,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 00:45:27,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:45:27,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 00:45:27,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 00:45:27,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212586430] [2023-02-15 00:45:27,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212586430] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 00:45:27,911 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 00:45:27,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 00:45:27,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347302391] [2023-02-15 00:45:27,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 00:45:27,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-15 00:45:27,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 00:45:27,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-15 00:45:27,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 00:45:27,931 INFO L87 Difference]: Start difference. First operand has 21 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:45:27,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 00:45:27,944 INFO L93 Difference]: Finished difference Result 40 states and 62 transitions. [2023-02-15 00:45:27,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-15 00:45:27,945 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-02-15 00:45:27,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 00:45:27,949 INFO L225 Difference]: With dead ends: 40 [2023-02-15 00:45:27,949 INFO L226 Difference]: Without dead ends: 17 [2023-02-15 00:45:27,951 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 00:45:27,953 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 00:45:27,954 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 00:45:27,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-02-15 00:45:27,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-02-15 00:45:27,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-15 00:45:27,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 23 transitions. [2023-02-15 00:45:27,975 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 23 transitions. Word has length 7 [2023-02-15 00:45:27,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 00:45:27,975 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 23 transitions. [2023-02-15 00:45:27,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:45:27,976 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 23 transitions. [2023-02-15 00:45:27,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-15 00:45:27,976 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 00:45:27,976 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 00:45:27,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-15 00:45:27,977 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 00:45:27,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 00:45:27,977 INFO L85 PathProgramCache]: Analyzing trace with hash 178653015, now seen corresponding path program 1 times [2023-02-15 00:45:27,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 00:45:27,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548539542] [2023-02-15 00:45:27,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:45:27,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 00:45:27,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:45:28,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 00:45:28,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 00:45:28,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548539542] [2023-02-15 00:45:28,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548539542] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 00:45:28,044 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 00:45:28,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 00:45:28,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886242416] [2023-02-15 00:45:28,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 00:45:28,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 00:45:28,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 00:45:28,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 00:45:28,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 00:45:28,046 INFO L87 Difference]: Start difference. First operand 17 states and 23 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:45:28,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 00:45:28,059 INFO L93 Difference]: Finished difference Result 28 states and 36 transitions. [2023-02-15 00:45:28,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 00:45:28,059 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-02-15 00:45:28,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 00:45:28,060 INFO L225 Difference]: With dead ends: 28 [2023-02-15 00:45:28,060 INFO L226 Difference]: Without dead ends: 19 [2023-02-15 00:45:28,060 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 00:45:28,061 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 00:45:28,062 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 59 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 00:45:28,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-02-15 00:45:28,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-02-15 00:45:28,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-15 00:45:28,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2023-02-15 00:45:28,066 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 25 transitions. Word has length 8 [2023-02-15 00:45:28,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 00:45:28,066 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 25 transitions. [2023-02-15 00:45:28,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:45:28,066 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2023-02-15 00:45:28,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-15 00:45:28,067 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 00:45:28,067 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 00:45:28,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-15 00:45:28,067 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 00:45:28,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 00:45:28,068 INFO L85 PathProgramCache]: Analyzing trace with hash 180321311, now seen corresponding path program 1 times [2023-02-15 00:45:28,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 00:45:28,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227941921] [2023-02-15 00:45:28,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:45:28,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 00:45:28,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:45:28,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 00:45:28,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 00:45:28,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227941921] [2023-02-15 00:45:28,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227941921] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 00:45:28,153 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 00:45:28,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 00:45:28,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543673429] [2023-02-15 00:45:28,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 00:45:28,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 00:45:28,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 00:45:28,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 00:45:28,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 00:45:28,155 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:45:28,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 00:45:28,235 INFO L93 Difference]: Finished difference Result 32 states and 43 transitions. [2023-02-15 00:45:28,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 00:45:28,235 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-02-15 00:45:28,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 00:45:28,236 INFO L225 Difference]: With dead ends: 32 [2023-02-15 00:45:28,236 INFO L226 Difference]: Without dead ends: 30 [2023-02-15 00:45:28,236 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-15 00:45:28,237 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 7 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 00:45:28,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 69 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 00:45:28,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-02-15 00:45:28,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2023-02-15 00:45:28,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 17 states have internal predecessors, (19), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-15 00:45:28,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 38 transitions. [2023-02-15 00:45:28,246 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 38 transitions. Word has length 8 [2023-02-15 00:45:28,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 00:45:28,246 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 38 transitions. [2023-02-15 00:45:28,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:45:28,246 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2023-02-15 00:45:28,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-02-15 00:45:28,247 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 00:45:28,247 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 00:45:28,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-15 00:45:28,247 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 00:45:28,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 00:45:28,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1242689983, now seen corresponding path program 1 times [2023-02-15 00:45:28,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 00:45:28,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267156195] [2023-02-15 00:45:28,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:45:28,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 00:45:28,272 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 00:45:28,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1226436237] [2023-02-15 00:45:28,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:45:28,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 00:45:28,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 00:45:28,280 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 00:45:28,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-15 00:45:28,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:45:28,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-15 00:45:28,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 00:45:28,500 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 00:45:28,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 00:45:28,656 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 00:45:28,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 00:45:28,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267156195] [2023-02-15 00:45:28,657 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 00:45:28,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226436237] [2023-02-15 00:45:28,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226436237] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 00:45:28,659 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 00:45:28,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2023-02-15 00:45:28,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202200451] [2023-02-15 00:45:28,661 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 00:45:28,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-15 00:45:28,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 00:45:28,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-15 00:45:28,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-02-15 00:45:28,665 INFO L87 Difference]: Start difference. First operand 28 states and 38 transitions. Second operand has 12 states, 10 states have (on average 1.7) internal successors, (17), 9 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 00:45:28,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 00:45:28,788 INFO L93 Difference]: Finished difference Result 40 states and 53 transitions. [2023-02-15 00:45:28,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-15 00:45:28,789 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 1.7) internal successors, (17), 9 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 13 [2023-02-15 00:45:28,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 00:45:28,791 INFO L225 Difference]: With dead ends: 40 [2023-02-15 00:45:28,791 INFO L226 Difference]: Without dead ends: 35 [2023-02-15 00:45:28,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-02-15 00:45:28,792 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 24 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 00:45:28,793 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 42 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 00:45:28,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-02-15 00:45:28,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2023-02-15 00:45:28,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-15 00:45:28,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2023-02-15 00:45:28,800 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 13 [2023-02-15 00:45:28,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 00:45:28,801 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2023-02-15 00:45:28,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 1.7) internal successors, (17), 9 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 00:45:28,801 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2023-02-15 00:45:28,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-15 00:45:28,802 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 00:45:28,802 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 00:45:28,809 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-15 00:45:29,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 00:45:29,011 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 00:45:29,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 00:45:29,012 INFO L85 PathProgramCache]: Analyzing trace with hash 259746456, now seen corresponding path program 1 times [2023-02-15 00:45:29,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 00:45:29,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36960841] [2023-02-15 00:45:29,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:45:29,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 00:45:29,021 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 00:45:29,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [876440271] [2023-02-15 00:45:29,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:45:29,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 00:45:29,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 00:45:29,023 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 00:45:29,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-15 00:45:29,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:45:29,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-15 00:45:29,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 00:45:29,098 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-15 00:45:29,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 00:45:29,130 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-15 00:45:29,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 00:45:29,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36960841] [2023-02-15 00:45:29,130 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 00:45:29,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876440271] [2023-02-15 00:45:29,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876440271] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 00:45:29,131 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 00:45:29,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2023-02-15 00:45:29,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981973688] [2023-02-15 00:45:29,131 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 00:45:29,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-15 00:45:29,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 00:45:29,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-15 00:45:29,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-02-15 00:45:29,133 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-15 00:45:29,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 00:45:29,211 INFO L93 Difference]: Finished difference Result 88 states and 105 transitions. [2023-02-15 00:45:29,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-15 00:45:29,212 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 26 [2023-02-15 00:45:29,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 00:45:29,213 INFO L225 Difference]: With dead ends: 88 [2023-02-15 00:45:29,213 INFO L226 Difference]: Without dead ends: 75 [2023-02-15 00:45:29,213 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-02-15 00:45:29,227 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 33 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 00:45:29,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 150 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 00:45:29,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-02-15 00:45:29,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 71. [2023-02-15 00:45:29,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 41 states have (on average 1.170731707317073) internal successors, (48), 44 states have internal predecessors, (48), 21 states have call successors, (21), 8 states have call predecessors, (21), 8 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2023-02-15 00:45:29,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 87 transitions. [2023-02-15 00:45:29,254 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 87 transitions. Word has length 26 [2023-02-15 00:45:29,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 00:45:29,255 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 87 transitions. [2023-02-15 00:45:29,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-15 00:45:29,255 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 87 transitions. [2023-02-15 00:45:29,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-15 00:45:29,255 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 00:45:29,256 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 00:45:29,264 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-15 00:45:29,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 00:45:29,464 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 00:45:29,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 00:45:29,465 INFO L85 PathProgramCache]: Analyzing trace with hash 261414752, now seen corresponding path program 1 times [2023-02-15 00:45:29,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 00:45:29,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849542220] [2023-02-15 00:45:29,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:45:29,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 00:45:29,471 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 00:45:29,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [811655676] [2023-02-15 00:45:29,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:45:29,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 00:45:29,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 00:45:29,474 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 00:45:29,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-15 00:45:29,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:45:29,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-15 00:45:29,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 00:45:29,539 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-15 00:45:29,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 00:45:29,570 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 00:45:29,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 00:45:29,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849542220] [2023-02-15 00:45:29,570 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 00:45:29,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811655676] [2023-02-15 00:45:29,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811655676] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-15 00:45:29,571 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 00:45:29,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2023-02-15 00:45:29,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450182047] [2023-02-15 00:45:29,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 00:45:29,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 00:45:29,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 00:45:29,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 00:45:29,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-02-15 00:45:29,572 INFO L87 Difference]: Start difference. First operand 71 states and 87 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 00:45:29,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 00:45:29,614 INFO L93 Difference]: Finished difference Result 85 states and 100 transitions. [2023-02-15 00:45:29,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 00:45:29,614 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 26 [2023-02-15 00:45:29,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 00:45:29,616 INFO L225 Difference]: With dead ends: 85 [2023-02-15 00:45:29,616 INFO L226 Difference]: Without dead ends: 83 [2023-02-15 00:45:29,616 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-02-15 00:45:29,618 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 8 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 00:45:29,619 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 45 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 00:45:29,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-02-15 00:45:29,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2023-02-15 00:45:29,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 50 states have (on average 1.14) internal successors, (57), 53 states have internal predecessors, (57), 21 states have call successors, (21), 11 states have call predecessors, (21), 11 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2023-02-15 00:45:29,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 96 transitions. [2023-02-15 00:45:29,641 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 96 transitions. Word has length 26 [2023-02-15 00:45:29,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 00:45:29,642 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 96 transitions. [2023-02-15 00:45:29,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 00:45:29,642 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 96 transitions. [2023-02-15 00:45:29,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-02-15 00:45:29,643 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 00:45:29,643 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-02-15 00:45:29,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-15 00:45:29,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 00:45:29,849 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 00:45:29,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 00:45:29,850 INFO L85 PathProgramCache]: Analyzing trace with hash 854826784, now seen corresponding path program 2 times [2023-02-15 00:45:29,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 00:45:29,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674087948] [2023-02-15 00:45:29,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:45:29,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 00:45:29,856 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 00:45:29,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [679730579] [2023-02-15 00:45:29,857 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 00:45:29,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 00:45:29,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 00:45:29,858 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 00:45:29,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-15 00:45:29,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 00:45:29,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 00:45:29,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-15 00:45:29,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 00:45:29,959 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-02-15 00:45:29,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 00:45:30,057 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-15 00:45:30,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 00:45:30,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674087948] [2023-02-15 00:45:30,058 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 00:45:30,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679730579] [2023-02-15 00:45:30,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679730579] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 00:45:30,058 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 00:45:30,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2023-02-15 00:45:30,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969200726] [2023-02-15 00:45:30,059 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 00:45:30,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-15 00:45:30,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 00:45:30,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-15 00:45:30,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2023-02-15 00:45:30,061 INFO L87 Difference]: Start difference. First operand 83 states and 96 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 4 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2023-02-15 00:45:30,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 00:45:30,192 INFO L93 Difference]: Finished difference Result 83 states and 96 transitions. [2023-02-15 00:45:30,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-15 00:45:30,192 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 4 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) Word has length 36 [2023-02-15 00:45:30,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 00:45:30,193 INFO L225 Difference]: With dead ends: 83 [2023-02-15 00:45:30,193 INFO L226 Difference]: Without dead ends: 0 [2023-02-15 00:45:30,193 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2023-02-15 00:45:30,194 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 13 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 00:45:30,194 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 75 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 00:45:30,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-02-15 00:45:30,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-02-15 00:45:30,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:45:30,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-02-15 00:45:30,194 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 36 [2023-02-15 00:45:30,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 00:45:30,195 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-02-15 00:45:30,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 4 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2023-02-15 00:45:30,195 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-02-15 00:45:30,195 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-02-15 00:45:30,196 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-02-15 00:45:30,203 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-15 00:45:30,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 00:45:30,403 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-02-15 00:45:31,025 INFO L899 garLoopResultBuilder]: For program point L33(lines 30 42) no Hoare annotation was computed. [2023-02-15 00:45:31,025 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2023-02-15 00:45:31,025 INFO L895 garLoopResultBuilder]: At program point L31(line 31) the Hoare annotation is: (and (= |ULTIMATE.start_main_~t~0#1| (+ 1 (* 2 |ULTIMATE.start_main_~a~0#1|))) (= (* |ULTIMATE.start_main_~s~0#1| 4) (+ (* |ULTIMATE.start_main_~t~0#1| |ULTIMATE.start_main_~t~0#1|) (* 2 |ULTIMATE.start_main_~t~0#1|) 1))) [2023-02-15 00:45:31,025 INFO L895 garLoopResultBuilder]: At program point L31-1(line 31) the Hoare annotation is: (and (= |ULTIMATE.start_main_~t~0#1| (+ 1 (* 2 |ULTIMATE.start_main_~a~0#1|))) (= (* |ULTIMATE.start_main_~s~0#1| 4) (+ (* |ULTIMATE.start_main_~t~0#1| |ULTIMATE.start_main_~t~0#1|) (* 2 |ULTIMATE.start_main_~t~0#1|) 1))) [2023-02-15 00:45:31,025 INFO L899 garLoopResultBuilder]: For program point L46(line 46) no Hoare annotation was computed. [2023-02-15 00:45:31,025 INFO L895 garLoopResultBuilder]: At program point L44(line 44) the Hoare annotation is: (and (= |ULTIMATE.start_main_~t~0#1| (+ 1 (* 2 |ULTIMATE.start_main_~a~0#1|))) (= (* |ULTIMATE.start_main_~s~0#1| 4) (+ (* |ULTIMATE.start_main_~t~0#1| |ULTIMATE.start_main_~t~0#1|) (* 2 |ULTIMATE.start_main_~t~0#1|) 1))) [2023-02-15 00:45:31,026 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line -1) no Hoare annotation was computed. [2023-02-15 00:45:31,026 INFO L902 garLoopResultBuilder]: At program point main_returnLabel#1(lines 21 49) the Hoare annotation is: true [2023-02-15 00:45:31,026 INFO L895 garLoopResultBuilder]: At program point L32(line 32) the Hoare annotation is: (and (= |ULTIMATE.start_main_~t~0#1| (+ 1 (* 2 |ULTIMATE.start_main_~a~0#1|))) (= (* |ULTIMATE.start_main_~s~0#1| 4) (+ (* |ULTIMATE.start_main_~t~0#1| |ULTIMATE.start_main_~t~0#1|) (* 2 |ULTIMATE.start_main_~t~0#1|) 1))) [2023-02-15 00:45:31,026 INFO L899 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2023-02-15 00:45:31,026 INFO L899 garLoopResultBuilder]: For program point L30-1(lines 30 42) no Hoare annotation was computed. [2023-02-15 00:45:31,026 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2023-02-15 00:45:31,026 INFO L895 garLoopResultBuilder]: At program point L30-3(lines 30 42) the Hoare annotation is: (and (= |ULTIMATE.start_main_~t~0#1| (+ 1 (* 2 |ULTIMATE.start_main_~a~0#1|))) (= (* |ULTIMATE.start_main_~s~0#1| 4) (+ (* |ULTIMATE.start_main_~t~0#1| |ULTIMATE.start_main_~t~0#1|) (* 2 |ULTIMATE.start_main_~t~0#1|) 1))) [2023-02-15 00:45:31,026 INFO L895 garLoopResultBuilder]: At program point L30-4(lines 30 42) the Hoare annotation is: (and (= |ULTIMATE.start_main_~t~0#1| (+ 1 (* 2 |ULTIMATE.start_main_~a~0#1|))) (= (* |ULTIMATE.start_main_~s~0#1| 4) (+ (* |ULTIMATE.start_main_~t~0#1| |ULTIMATE.start_main_~t~0#1|) (* 2 |ULTIMATE.start_main_~t~0#1|) 1))) [2023-02-15 00:45:31,026 INFO L895 garLoopResultBuilder]: At program point L45(line 45) the Hoare annotation is: (and (= |ULTIMATE.start_main_~t~0#1| (+ 1 (* 2 |ULTIMATE.start_main_~a~0#1|))) (= (* |ULTIMATE.start_main_~s~0#1| 4) (+ (* |ULTIMATE.start_main_~t~0#1| |ULTIMATE.start_main_~t~0#1|) (* 2 |ULTIMATE.start_main_~t~0#1|) 1))) [2023-02-15 00:45:31,026 INFO L899 garLoopResultBuilder]: For program point L13(lines 13 14) no Hoare annotation was computed. [2023-02-15 00:45:31,026 INFO L899 garLoopResultBuilder]: For program point L12(lines 12 15) no Hoare annotation was computed. [2023-02-15 00:45:31,026 INFO L899 garLoopResultBuilder]: For program point L12-2(lines 11 17) no Hoare annotation was computed. [2023-02-15 00:45:31,026 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 11 17) no Hoare annotation was computed. [2023-02-15 00:45:31,026 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 11 17) the Hoare annotation is: true [2023-02-15 00:45:31,026 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 14) no Hoare annotation was computed. [2023-02-15 00:45:31,029 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1] [2023-02-15 00:45:31,030 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-02-15 00:45:31,038 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.02 12:45:31 BoogieIcfgContainer [2023-02-15 00:45:31,038 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-02-15 00:45:31,039 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-02-15 00:45:31,039 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-02-15 00:45:31,039 INFO L275 PluginConnector]: Witness Printer initialized [2023-02-15 00:45:31,039 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 12:45:27" (3/4) ... [2023-02-15 00:45:31,041 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-02-15 00:45:31,045 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2023-02-15 00:45:31,047 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2023-02-15 00:45:31,047 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2023-02-15 00:45:31,047 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2023-02-15 00:45:31,047 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-02-15 00:45:31,067 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-02-15 00:45:31,067 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-02-15 00:45:31,068 INFO L158 Benchmark]: Toolchain (without parser) took 3725.75ms. Allocated memory was 140.5MB in the beginning and 169.9MB in the end (delta: 29.4MB). Free memory was 104.9MB in the beginning and 69.8MB in the end (delta: 35.1MB). Peak memory consumption was 62.9MB. Max. memory is 16.1GB. [2023-02-15 00:45:31,068 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 115.3MB. Free memory is still 88.8MB. There was no memory consumed. Max. memory is 16.1GB. [2023-02-15 00:45:31,068 INFO L158 Benchmark]: CACSL2BoogieTranslator took 141.41ms. Allocated memory is still 140.5MB. Free memory was 104.4MB in the beginning and 93.9MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-02-15 00:45:31,068 INFO L158 Benchmark]: Boogie Procedure Inliner took 18.04ms. Allocated memory is still 140.5MB. Free memory was 93.9MB in the beginning and 92.9MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2023-02-15 00:45:31,068 INFO L158 Benchmark]: Boogie Preprocessor took 11.18ms. Allocated memory is still 140.5MB. Free memory was 92.9MB in the beginning and 91.8MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-02-15 00:45:31,069 INFO L158 Benchmark]: RCFGBuilder took 236.05ms. Allocated memory is still 140.5MB. Free memory was 91.3MB in the beginning and 104.8MB in the end (delta: -13.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-02-15 00:45:31,069 INFO L158 Benchmark]: TraceAbstraction took 3286.25ms. Allocated memory was 140.5MB in the beginning and 169.9MB in the end (delta: 29.4MB). Free memory was 104.5MB in the beginning and 71.9MB in the end (delta: 32.7MB). Peak memory consumption was 64.1MB. Max. memory is 16.1GB. [2023-02-15 00:45:31,069 INFO L158 Benchmark]: Witness Printer took 28.36ms. Allocated memory is still 169.9MB. Free memory was 71.9MB in the beginning and 69.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-02-15 00:45:31,070 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 115.3MB. Free memory is still 88.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 141.41ms. Allocated memory is still 140.5MB. Free memory was 104.4MB in the beginning and 93.9MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 18.04ms. Allocated memory is still 140.5MB. Free memory was 93.9MB in the beginning and 92.9MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 11.18ms. Allocated memory is still 140.5MB. Free memory was 92.9MB in the beginning and 91.8MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 236.05ms. Allocated memory is still 140.5MB. Free memory was 91.3MB in the beginning and 104.8MB in the end (delta: -13.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * TraceAbstraction took 3286.25ms. Allocated memory was 140.5MB in the beginning and 169.9MB in the end (delta: 29.4MB). Free memory was 104.5MB in the beginning and 71.9MB in the end (delta: 32.7MB). Peak memory consumption was 64.1MB. Max. memory is 16.1GB. * Witness Printer took 28.36ms. Allocated memory is still 169.9MB. Free memory was 71.9MB in the beginning and 69.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 14]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 21 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 3.2s, OverallIterations: 7, TraceHistogramMax: 6, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.6s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 106 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 85 mSDsluCounter, 467 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 312 mSDsCounter, 36 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 465 IncrementalHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 36 mSolverCounterUnsat, 155 mSDtfsCounter, 465 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 213 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=83occurred in iteration=6, InterpolantAutomatonStates: 46, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 10 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 44 PreInvPairs, 74 NumberOfFragments, 142 HoareAnnotationTreeSize, 44 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 9 FomulaSimplificationsInter, 882 FormulaSimplificationTreeSizeReductionInter, 0.6s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 124 NumberOfCodeBlocks, 124 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 214 ConstructedInterpolants, 0 QuantifiedInterpolants, 840 SizeOfPredicates, 11 NumberOfNonLiveVariables, 340 ConjunctsInSsa, 59 ConjunctsInUnsatCore, 11 InterpolantComputations, 4 PerfectInterpolantSequences, 156/196 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 21]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 30]: Loop Invariant Derived loop invariant: t == 1 + 2 * a && s * 4 == t * t + 2 * t + 1 RESULT: Ultimate proved your program to be correct! [2023-02-15 00:45:31,087 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 Writing output log to file Ultimate.log Result: TRUE