./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/fibo_5-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 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/recursive-simple/fibo_5-1.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 2199d5dae92fc703178378f6dd7dec10a5f129181c51bc9a88c002f6d4f76a67 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 18:06:47,468 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 18:06:47,470 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 18:06:47,495 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 18:06:47,496 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 18:06:47,496 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 18:06:47,497 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 18:06:47,499 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 18:06:47,503 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 18:06:47,508 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 18:06:47,509 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 18:06:47,511 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 18:06:47,511 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 18:06:47,513 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 18:06:47,515 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 18:06:47,517 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 18:06:47,517 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 18:06:47,518 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 18:06:47,523 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 18:06:47,524 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 18:06:47,525 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 18:06:47,526 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 18:06:47,526 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 18:06:47,527 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 18:06:47,528 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 18:06:47,529 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 18:06:47,529 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 18:06:47,530 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 18:06:47,530 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 18:06:47,530 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 18:06:47,531 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 18:06:47,531 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 18:06:47,532 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 18:06:47,532 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 18:06:47,533 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 18:06:47,533 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 18:06:47,534 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 18:06:47,534 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 18:06:47,534 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 18:06:47,535 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 18:06:47,535 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 18:06:47,536 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 18:06:47,537 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 18:06:47,584 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 18:06:47,585 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 18:06:47,585 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 18:06:47,585 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 18:06:47,585 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 18:06:47,585 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 18:06:47,586 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 18:06:47,586 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 18:06:47,586 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 18:06:47,586 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 18:06:47,586 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 18:06:47,586 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 18:06:47,586 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 18:06:47,586 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 18:06:47,586 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 18:06:47,586 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 18:06:47,586 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 18:06:47,587 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 18:06:47,587 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 18:06:47,587 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 18:06:47,595 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 18:06:47,596 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 18:06:47,596 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 18:06:47,596 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 18:06:47,596 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 18:06:47,596 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 18:06:47,596 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 18:06:47,597 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 18:06:47,597 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 18:06:47,597 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 18:06:47,597 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 18:06:47,597 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 18:06:47,597 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 18:06:47,597 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2199d5dae92fc703178378f6dd7dec10a5f129181c51bc9a88c002f6d4f76a67 [2022-07-13 18:06:47,765 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 18:06:47,783 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 18:06:47,785 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 18:06:47,786 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 18:06:47,786 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 18:06:47,787 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/fibo_5-1.c [2022-07-13 18:06:47,835 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61bf6d5d3/be9d11a03d3b4a45a1180551d6d572cf/FLAG8360dc19f [2022-07-13 18:06:48,176 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 18:06:48,177 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_5-1.c [2022-07-13 18:06:48,181 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61bf6d5d3/be9d11a03d3b4a45a1180551d6d572cf/FLAG8360dc19f [2022-07-13 18:06:48,189 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61bf6d5d3/be9d11a03d3b4a45a1180551d6d572cf [2022-07-13 18:06:48,191 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 18:06:48,192 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 18:06:48,193 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 18:06:48,193 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 18:06:48,196 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 18:06:48,196 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 06:06:48" (1/1) ... [2022-07-13 18:06:48,197 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c21f178 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:06:48, skipping insertion in model container [2022-07-13 18:06:48,197 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 06:06:48" (1/1) ... [2022-07-13 18:06:48,211 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 18:06:48,219 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 18:06:48,331 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_5-1.c[740,753] [2022-07-13 18:06:48,333 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 18:06:48,337 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 18:06:48,349 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_5-1.c[740,753] [2022-07-13 18:06:48,349 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 18:06:48,358 INFO L208 MainTranslator]: Completed translation [2022-07-13 18:06:48,358 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:06:48 WrapperNode [2022-07-13 18:06:48,358 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 18:06:48,359 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 18:06:48,359 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 18:06:48,359 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 18:06:48,364 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:06:48" (1/1) ... [2022-07-13 18:06:48,369 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:06:48" (1/1) ... [2022-07-13 18:06:48,380 INFO L137 Inliner]: procedures = 13, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 21 [2022-07-13 18:06:48,380 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 18:06:48,381 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 18:06:48,381 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 18:06:48,381 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 18:06:48,386 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:06:48" (1/1) ... [2022-07-13 18:06:48,387 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:06:48" (1/1) ... [2022-07-13 18:06:48,388 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:06:48" (1/1) ... [2022-07-13 18:06:48,389 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:06:48" (1/1) ... [2022-07-13 18:06:48,391 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:06:48" (1/1) ... [2022-07-13 18:06:48,392 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:06:48" (1/1) ... [2022-07-13 18:06:48,395 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:06:48" (1/1) ... [2022-07-13 18:06:48,397 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 18:06:48,398 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 18:06:48,398 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 18:06:48,399 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 18:06:48,399 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:06:48" (1/1) ... [2022-07-13 18:06:48,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 18:06:48,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:06:48,421 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-13 18:06:48,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-13 18:06:48,463 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 18:06:48,463 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 18:06:48,463 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 18:06:48,464 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 18:06:48,464 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2022-07-13 18:06:48,464 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2022-07-13 18:06:48,504 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 18:06:48,505 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 18:06:48,566 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 18:06:48,570 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 18:06:48,570 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-07-13 18:06:48,572 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 06:06:48 BoogieIcfgContainer [2022-07-13 18:06:48,572 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 18:06:48,573 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 18:06:48,573 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 18:06:48,576 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 18:06:48,576 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 06:06:48" (1/3) ... [2022-07-13 18:06:48,577 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71dbadce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 06:06:48, skipping insertion in model container [2022-07-13 18:06:48,577 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:06:48" (2/3) ... [2022-07-13 18:06:48,577 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71dbadce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 06:06:48, skipping insertion in model container [2022-07-13 18:06:48,578 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 06:06:48" (3/3) ... [2022-07-13 18:06:48,579 INFO L111 eAbstractionObserver]: Analyzing ICFG fibo_5-1.c [2022-07-13 18:06:48,588 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 18:06:48,589 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 18:06:48,627 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 18:06:48,631 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3244e239, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@386ef180 [2022-07-13 18:06:48,632 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-13 18:06:48,644 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 15 states have internal predecessors, (18), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-13 18:06:48,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-13 18:06:48,653 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:06:48,653 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:06:48,654 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:06:48,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:06:48,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1755511548, now seen corresponding path program 1 times [2022-07-13 18:06:48,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:06:48,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36510324] [2022-07-13 18:06:48,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:06:48,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:06:48,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:06:48,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:06:48,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:06:48,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 18:06:48,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:06:48,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36510324] [2022-07-13 18:06:48,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36510324] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:06:48,863 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:06:48,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 18:06:48,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877812359] [2022-07-13 18:06:48,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:06:48,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 18:06:48,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:06:48,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 18:06:48,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 18:06:48,912 INFO L87 Difference]: Start difference. First operand has 20 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 15 states have internal predecessors, (18), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-13 18:06:48,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:06:48,974 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2022-07-13 18:06:48,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 18:06:48,977 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2022-07-13 18:06:48,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:06:48,982 INFO L225 Difference]: With dead ends: 30 [2022-07-13 18:06:48,982 INFO L226 Difference]: Without dead ends: 18 [2022-07-13 18:06:48,984 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-13 18:06:48,986 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 15 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 18:06:48,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 42 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 18:06:48,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-07-13 18:06:49,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-07-13 18:06:49,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 13 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-13 18:06:49,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2022-07-13 18:06:49,009 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 10 [2022-07-13 18:06:49,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:06:49,010 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2022-07-13 18:06:49,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-13 18:06:49,011 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2022-07-13 18:06:49,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-13 18:06:49,013 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:06:49,013 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:06:49,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 18:06:49,014 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:06:49,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:06:49,014 INFO L85 PathProgramCache]: Analyzing trace with hash 2128459596, now seen corresponding path program 1 times [2022-07-13 18:06:49,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:06:49,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884742915] [2022-07-13 18:06:49,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:06:49,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:06:49,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:06:49,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:06:49,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:06:49,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 18:06:49,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:06:49,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884742915] [2022-07-13 18:06:49,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884742915] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:06:49,053 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:06:49,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 18:06:49,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335783872] [2022-07-13 18:06:49,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:06:49,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 18:06:49,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:06:49,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 18:06:49,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 18:06:49,055 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-13 18:06:49,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:06:49,081 INFO L93 Difference]: Finished difference Result 24 states and 29 transitions. [2022-07-13 18:06:49,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 18:06:49,081 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-07-13 18:06:49,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:06:49,082 INFO L225 Difference]: With dead ends: 24 [2022-07-13 18:06:49,082 INFO L226 Difference]: Without dead ends: 20 [2022-07-13 18:06:49,083 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-13 18:06:49,083 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 10 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 18:06:49,084 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 30 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 18:06:49,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-07-13 18:06:49,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2022-07-13 18:06:49,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 13 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-13 18:06:49,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2022-07-13 18:06:49,088 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 11 [2022-07-13 18:06:49,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:06:49,088 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2022-07-13 18:06:49,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-13 18:06:49,089 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2022-07-13 18:06:49,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-13 18:06:49,089 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:06:49,090 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:06:49,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 18:06:49,090 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:06:49,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:06:49,090 INFO L85 PathProgramCache]: Analyzing trace with hash -42544313, now seen corresponding path program 1 times [2022-07-13 18:06:49,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:06:49,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867295924] [2022-07-13 18:06:49,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:06:49,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:06:49,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:06:49,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:06:49,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:06:49,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:06:49,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:06:49,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 18:06:49,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:06:49,152 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-13 18:06:49,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:06:49,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867295924] [2022-07-13 18:06:49,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867295924] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:06:49,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620477090] [2022-07-13 18:06:49,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:06:49,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:06:49,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:06:49,155 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) [2022-07-13 18:06:49,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 18:06:49,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:06:49,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-13 18:06:49,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 18:06:49,267 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-13 18:06:49,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 18:06:49,408 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-13 18:06:49,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620477090] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 18:06:49,409 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 18:06:49,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 12 [2022-07-13 18:06:49,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157690185] [2022-07-13 18:06:49,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 18:06:49,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-13 18:06:49,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:06:49,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-13 18:06:49,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-07-13 18:06:49,411 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 12 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 12 states have internal predecessors, (30), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-13 18:06:49,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:06:49,470 INFO L93 Difference]: Finished difference Result 35 states and 46 transitions. [2022-07-13 18:06:49,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-13 18:06:49,471 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 12 states have internal predecessors, (30), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) Word has length 23 [2022-07-13 18:06:49,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:06:49,471 INFO L225 Difference]: With dead ends: 35 [2022-07-13 18:06:49,471 INFO L226 Difference]: Without dead ends: 20 [2022-07-13 18:06:49,472 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2022-07-13 18:06:49,473 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 21 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 18:06:49,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 59 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 18:06:49,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-07-13 18:06:49,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-07-13 18:06:49,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 15 states have internal predecessors, (15), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-13 18:06:49,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2022-07-13 18:06:49,477 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 23 [2022-07-13 18:06:49,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:06:49,478 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2022-07-13 18:06:49,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 12 states have internal predecessors, (30), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-13 18:06:49,478 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2022-07-13 18:06:49,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-13 18:06:49,479 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:06:49,479 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:06:49,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-13 18:06:49,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:06:49,698 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:06:49,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:06:49,699 INFO L85 PathProgramCache]: Analyzing trace with hash 170813287, now seen corresponding path program 1 times [2022-07-13 18:06:49,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:06:49,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896050831] [2022-07-13 18:06:49,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:06:49,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:06:49,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:06:49,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:06:49,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:06:49,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:06:49,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:06:49,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-13 18:06:49,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:06:49,789 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 18:06:49,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:06:49,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896050831] [2022-07-13 18:06:49,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896050831] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:06:49,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057464648] [2022-07-13 18:06:49,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:06:49,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:06:49,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:06:49,796 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) [2022-07-13 18:06:49,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 18:06:49,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:06:49,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-13 18:06:49,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 18:06:49,866 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 18:06:49,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 18:06:49,993 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-13 18:06:49,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057464648] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 18:06:49,993 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 18:06:49,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 11 [2022-07-13 18:06:49,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068830533] [2022-07-13 18:06:49,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 18:06:49,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-13 18:06:49,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:06:49,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-13 18:06:49,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2022-07-13 18:06:49,995 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 11 states, 9 states have (on average 3.111111111111111) internal successors, (28), 11 states have internal predecessors, (28), 7 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (7), 3 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-13 18:06:50,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:06:50,059 INFO L93 Difference]: Finished difference Result 38 states and 52 transitions. [2022-07-13 18:06:50,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 18:06:50,060 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 3.111111111111111) internal successors, (28), 11 states have internal predecessors, (28), 7 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (7), 3 states have call predecessors, (7), 7 states have call successors, (7) Word has length 24 [2022-07-13 18:06:50,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:06:50,061 INFO L225 Difference]: With dead ends: 38 [2022-07-13 18:06:50,061 INFO L226 Difference]: Without dead ends: 34 [2022-07-13 18:06:50,061 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2022-07-13 18:06:50,062 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 35 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 18:06:50,062 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 44 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 18:06:50,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-07-13 18:06:50,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-07-13 18:06:50,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 24 states have internal predecessors, (26), 6 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) [2022-07-13 18:06:50,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 48 transitions. [2022-07-13 18:06:50,081 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 48 transitions. Word has length 24 [2022-07-13 18:06:50,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:06:50,081 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 48 transitions. [2022-07-13 18:06:50,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 3.111111111111111) internal successors, (28), 11 states have internal predecessors, (28), 7 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (7), 3 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-13 18:06:50,086 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 48 transitions. [2022-07-13 18:06:50,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-13 18:06:50,087 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:06:50,088 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:06:50,105 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-13 18:06:50,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-07-13 18:06:50,304 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:06:50,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:06:50,305 INFO L85 PathProgramCache]: Analyzing trace with hash -187634876, now seen corresponding path program 2 times [2022-07-13 18:06:50,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:06:50,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063475587] [2022-07-13 18:06:50,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:06:50,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:06:50,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:06:50,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:06:50,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:06:50,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:06:50,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:06:50,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:06:50,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:06:50,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-13 18:06:50,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:06:50,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-13 18:06:50,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:06:50,390 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 23 proven. 7 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-13 18:06:50,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:06:50,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063475587] [2022-07-13 18:06:50,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063475587] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:06:50,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533255480] [2022-07-13 18:06:50,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 18:06:50,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:06:50,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:06:50,393 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) [2022-07-13 18:06:50,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 18:06:50,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 18:06:50,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 18:06:50,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 18:06:50,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 18:06:50,490 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-13 18:06:50,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 18:06:50,686 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-13 18:06:50,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533255480] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 18:06:50,686 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 18:06:50,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 9] total 17 [2022-07-13 18:06:50,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247770371] [2022-07-13 18:06:50,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 18:06:50,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-13 18:06:50,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:06:50,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-13 18:06:50,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2022-07-13 18:06:50,688 INFO L87 Difference]: Start difference. First operand 34 states and 48 transitions. Second operand has 17 states, 15 states have (on average 2.933333333333333) internal successors, (44), 17 states have internal predecessors, (44), 10 states have call successors, (12), 1 states have call predecessors, (12), 7 states have return successors, (13), 6 states have call predecessors, (13), 10 states have call successors, (13) [2022-07-13 18:06:50,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:06:50,835 INFO L93 Difference]: Finished difference Result 69 states and 106 transitions. [2022-07-13 18:06:50,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-13 18:06:50,836 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.933333333333333) internal successors, (44), 17 states have internal predecessors, (44), 10 states have call successors, (12), 1 states have call predecessors, (12), 7 states have return successors, (13), 6 states have call predecessors, (13), 10 states have call successors, (13) Word has length 37 [2022-07-13 18:06:50,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:06:50,837 INFO L225 Difference]: With dead ends: 69 [2022-07-13 18:06:50,837 INFO L226 Difference]: Without dead ends: 38 [2022-07-13 18:06:50,837 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=368, Unknown=0, NotChecked=0, Total=506 [2022-07-13 18:06:50,838 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 44 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 18:06:50,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 94 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 18:06:50,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-07-13 18:06:50,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-07-13 18:06:50,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 26 states have internal predecessors, (30), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) [2022-07-13 18:06:50,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2022-07-13 18:06:50,843 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 37 [2022-07-13 18:06:50,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:06:50,843 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2022-07-13 18:06:50,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 2.933333333333333) internal successors, (44), 17 states have internal predecessors, (44), 10 states have call successors, (12), 1 states have call predecessors, (12), 7 states have return successors, (13), 6 states have call predecessors, (13), 10 states have call successors, (13) [2022-07-13 18:06:50,844 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2022-07-13 18:06:50,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-13 18:06:50,845 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:06:50,845 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 7, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:06:50,863 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-13 18:06:51,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:06:51,061 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:06:51,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:06:51,061 INFO L85 PathProgramCache]: Analyzing trace with hash -2015531204, now seen corresponding path program 3 times [2022-07-13 18:06:51,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:06:51,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958252803] [2022-07-13 18:06:51,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:06:51,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:06:51,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:06:51,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:06:51,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:06:51,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:06:51,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:06:51,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:06:51,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:06:51,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:06:51,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:06:51,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-13 18:06:51,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:06:51,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-13 18:06:51,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:06:51,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-07-13 18:06:51,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:06:51,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:06:51,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:06:51,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-13 18:06:51,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:06:51,226 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 17 proven. 88 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-13 18:06:51,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:06:51,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958252803] [2022-07-13 18:06:51,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958252803] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:06:51,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138642148] [2022-07-13 18:06:51,227 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 18:06:51,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:06:51,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:06:51,238 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) [2022-07-13 18:06:51,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-13 18:06:51,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-13 18:06:51,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 18:06:51,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 18:06:51,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 18:06:51,339 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 65 proven. 22 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-07-13 18:06:51,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 18:06:51,581 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 65 proven. 29 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-07-13 18:06:51,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138642148] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 18:06:51,582 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 18:06:51,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 9] total 16 [2022-07-13 18:06:51,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564236468] [2022-07-13 18:06:51,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 18:06:51,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-13 18:06:51,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:06:51,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-13 18:06:51,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2022-07-13 18:06:51,583 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand has 16 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 16 states have internal predecessors, (43), 9 states have call successors, (13), 1 states have call predecessors, (13), 6 states have return successors, (16), 11 states have call predecessors, (16), 9 states have call successors, (16) [2022-07-13 18:06:51,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:06:51,695 INFO L93 Difference]: Finished difference Result 85 states and 124 transitions. [2022-07-13 18:06:51,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-13 18:06:51,697 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 16 states have internal predecessors, (43), 9 states have call successors, (13), 1 states have call predecessors, (13), 6 states have return successors, (16), 11 states have call predecessors, (16), 9 states have call successors, (16) Word has length 65 [2022-07-13 18:06:51,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:06:51,700 INFO L225 Difference]: With dead ends: 85 [2022-07-13 18:06:51,700 INFO L226 Difference]: Without dead ends: 50 [2022-07-13 18:06:51,703 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 139 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=109, Invalid=197, Unknown=0, NotChecked=0, Total=306 [2022-07-13 18:06:51,704 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 70 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 18:06:51,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 58 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 18:06:51,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-07-13 18:06:51,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2022-07-13 18:06:51,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 32 states have internal predecessors, (38), 7 states have call successors, (7), 5 states have call predecessors, (7), 6 states have return successors, (16), 9 states have call predecessors, (16), 7 states have call successors, (16) [2022-07-13 18:06:51,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 61 transitions. [2022-07-13 18:06:51,709 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 61 transitions. Word has length 65 [2022-07-13 18:06:51,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:06:51,709 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 61 transitions. [2022-07-13 18:06:51,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 16 states have internal predecessors, (43), 9 states have call successors, (13), 1 states have call predecessors, (13), 6 states have return successors, (16), 11 states have call predecessors, (16), 9 states have call successors, (16) [2022-07-13 18:06:51,710 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 61 transitions. [2022-07-13 18:06:51,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-07-13 18:06:51,710 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:06:51,711 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 12, 7, 7, 7, 7, 7, 7, 7, 5, 3, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:06:51,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-13 18:06:51,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:06:51,911 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:06:51,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:06:51,912 INFO L85 PathProgramCache]: Analyzing trace with hash -292645265, now seen corresponding path program 4 times [2022-07-13 18:06:51,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:06:51,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256203380] [2022-07-13 18:06:51,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:06:51,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:06:51,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:06:51,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:06:51,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:06:52,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:06:52,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:06:52,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:06:52,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:06:52,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:06:52,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:06:52,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:06:52,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:06:52,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-13 18:06:52,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:06:52,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-13 18:06:52,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:06:52,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-07-13 18:06:52,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:06:52,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:06:52,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:06:52,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-13 18:06:52,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:06:52,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-07-13 18:06:52,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:06:52,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:06:52,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:06:52,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:06:52,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:06:52,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-13 18:06:52,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:06:52,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-13 18:06:52,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:06:52,247 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 185 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2022-07-13 18:06:52,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:06:52,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256203380] [2022-07-13 18:06:52,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256203380] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:06:52,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462030261] [2022-07-13 18:06:52,248 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 18:06:52,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:06:52,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:06:52,250 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 18:06:52,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-13 18:06:52,309 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 18:06:52,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 18:06:52,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 63 conjunts are in the unsatisfiable core [2022-07-13 18:06:52,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 18:06:52,603 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 185 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2022-07-13 18:06:52,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 18:06:53,067 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 185 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2022-07-13 18:06:53,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462030261] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 18:06:53,067 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 18:06:53,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 20 [2022-07-13 18:06:53,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687744653] [2022-07-13 18:06:53,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 18:06:53,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-13 18:06:53,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:06:53,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-13 18:06:53,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2022-07-13 18:06:53,068 INFO L87 Difference]: Start difference. First operand 47 states and 61 transitions. Second operand has 20 states, 20 states have (on average 1.3) internal successors, (26), 11 states have internal predecessors, (26), 4 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (12), 12 states have call predecessors, (12), 4 states have call successors, (12) [2022-07-13 18:06:53,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:06:53,210 INFO L93 Difference]: Finished difference Result 72 states and 103 transitions. [2022-07-13 18:06:53,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-13 18:06:53,211 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.3) internal successors, (26), 11 states have internal predecessors, (26), 4 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (12), 12 states have call predecessors, (12), 4 states have call successors, (12) Word has length 106 [2022-07-13 18:06:53,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:06:53,212 INFO L225 Difference]: With dead ends: 72 [2022-07-13 18:06:53,212 INFO L226 Difference]: Without dead ends: 68 [2022-07-13 18:06:53,212 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 244 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2022-07-13 18:06:53,213 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 0 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 18:06:53,213 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 383 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 18:06:53,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-07-13 18:06:53,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 57. [2022-07-13 18:06:53,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 38 states have internal predecessors, (44), 9 states have call successors, (9), 5 states have call predecessors, (9), 8 states have return successors, (29), 13 states have call predecessors, (29), 9 states have call successors, (29) [2022-07-13 18:06:53,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 82 transitions. [2022-07-13 18:06:53,220 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 82 transitions. Word has length 106 [2022-07-13 18:06:53,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:06:53,220 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 82 transitions. [2022-07-13 18:06:53,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.3) internal successors, (26), 11 states have internal predecessors, (26), 4 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (12), 12 states have call predecessors, (12), 4 states have call successors, (12) [2022-07-13 18:06:53,220 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 82 transitions. [2022-07-13 18:06:53,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-07-13 18:06:53,222 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:06:53,222 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 14, 8, 8, 8, 8, 8, 8, 8, 6, 3, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:06:53,240 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-13 18:06:53,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:06:53,439 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:06:53,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:06:53,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1707817942, now seen corresponding path program 5 times [2022-07-13 18:06:53,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:06:53,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097749137] [2022-07-13 18:06:53,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:06:53,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:06:53,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:06:53,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:06:53,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:06:53,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:06:53,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:06:53,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:06:53,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:06:53,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:06:53,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:06:53,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:06:53,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:06:53,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-13 18:06:53,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:06:53,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-13 18:06:53,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:06:53,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-07-13 18:06:53,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:06:53,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:06:53,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:06:53,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-13 18:06:53,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:06:53,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-07-13 18:06:53,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:06:53,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:06:53,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:06:53,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:06:53,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:06:53,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:06:53,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:06:53,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-13 18:06:53,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:06:53,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-13 18:06:53,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:06:53,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-07-13 18:06:53,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:06:53,703 INFO L134 CoverageAnalysis]: Checked inductivity of 747 backedges. 223 proven. 216 refuted. 0 times theorem prover too weak. 308 trivial. 0 not checked. [2022-07-13 18:06:53,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:06:53,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097749137] [2022-07-13 18:06:53,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097749137] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:06:53,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817878688] [2022-07-13 18:06:53,704 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 18:06:53,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:06:53,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:06:53,706 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 18:06:53,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-13 18:06:53,752 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-07-13 18:06:53,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 18:06:53,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-13 18:06:53,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 18:06:53,910 INFO L134 CoverageAnalysis]: Checked inductivity of 747 backedges. 165 proven. 261 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2022-07-13 18:06:53,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 18:06:54,626 INFO L134 CoverageAnalysis]: Checked inductivity of 747 backedges. 162 proven. 310 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2022-07-13 18:06:54,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817878688] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 18:06:54,627 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 18:06:54,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 12, 18] total 34 [2022-07-13 18:06:54,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833543834] [2022-07-13 18:06:54,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 18:06:54,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-13 18:06:54,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:06:54,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-13 18:06:54,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=905, Unknown=0, NotChecked=0, Total=1122 [2022-07-13 18:06:54,628 INFO L87 Difference]: Start difference. First operand 57 states and 82 transitions. Second operand has 34 states, 33 states have (on average 2.515151515151515) internal successors, (83), 34 states have internal predecessors, (83), 22 states have call successors, (26), 1 states have call predecessors, (26), 15 states have return successors, (37), 21 states have call predecessors, (37), 22 states have call successors, (37) [2022-07-13 18:06:54,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:06:54,925 INFO L93 Difference]: Finished difference Result 125 states and 210 transitions. [2022-07-13 18:06:54,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-13 18:06:54,925 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.515151515151515) internal successors, (83), 34 states have internal predecessors, (83), 22 states have call successors, (26), 1 states have call predecessors, (26), 15 states have return successors, (37), 21 states have call predecessors, (37), 22 states have call successors, (37) Word has length 120 [2022-07-13 18:06:54,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:06:54,926 INFO L225 Difference]: With dead ends: 125 [2022-07-13 18:06:54,926 INFO L226 Difference]: Without dead ends: 74 [2022-07-13 18:06:54,927 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 253 SyntacticMatches, 7 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=390, Invalid=1332, Unknown=0, NotChecked=0, Total=1722 [2022-07-13 18:06:54,927 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 114 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 18:06:54,928 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 224 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 18:06:54,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-07-13 18:06:54,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 61. [2022-07-13 18:06:54,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 42 states have (on average 1.0476190476190477) internal successors, (44), 41 states have internal predecessors, (44), 10 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (21), 13 states have call predecessors, (21), 10 states have call successors, (21) [2022-07-13 18:06:54,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 75 transitions. [2022-07-13 18:06:54,933 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 75 transitions. Word has length 120 [2022-07-13 18:06:54,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:06:54,933 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 75 transitions. [2022-07-13 18:06:54,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.515151515151515) internal successors, (83), 34 states have internal predecessors, (83), 22 states have call successors, (26), 1 states have call predecessors, (26), 15 states have return successors, (37), 21 states have call predecessors, (37), 22 states have call successors, (37) [2022-07-13 18:06:54,933 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 75 transitions. [2022-07-13 18:06:54,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2022-07-13 18:06:54,935 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:06:54,935 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 25, 15, 15, 15, 15, 15, 15, 15, 10, 6, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:06:54,957 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-13 18:06:55,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:06:55,156 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:06:55,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:06:55,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1022210831, now seen corresponding path program 6 times [2022-07-13 18:06:55,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:06:55,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668442373] [2022-07-13 18:06:55,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:06:55,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:06:55,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:06:55,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:06:55,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:06:55,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:06:55,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:06:55,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:06:55,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:06:55,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:06:55,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:06:55,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:06:55,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:06:55,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:06:55,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:06:55,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-13 18:06:55,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:06:55,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-13 18:06:55,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:06:55,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-07-13 18:06:55,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:06:55,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:06:55,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:06:55,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-13 18:06:55,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:06:55,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-07-13 18:06:55,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:06:55,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:06:55,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:06:55,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:06:55,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:06:55,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-13 18:06:55,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:06:55,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-13 18:06:55,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:06:55,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-07-13 18:06:55,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:06:55,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:06:55,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:06:55,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:06:55,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:06:55,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:06:55,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:06:55,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:06:55,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:06:55,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-13 18:06:55,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:06:55,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-13 18:06:55,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:06:55,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-07-13 18:06:55,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:06:55,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:06:55,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:06:55,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-13 18:06:55,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:06:55,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-07-13 18:06:55,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:06:55,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:06:55,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:06:55,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:06:55,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:06:55,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-13 18:06:55,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:06:55,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-13 18:06:55,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:06:55,385 INFO L134 CoverageAnalysis]: Checked inductivity of 2580 backedges. 192 proven. 428 refuted. 0 times theorem prover too weak. 1960 trivial. 0 not checked. [2022-07-13 18:06:55,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:06:55,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668442373] [2022-07-13 18:06:55,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668442373] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:06:55,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981211945] [2022-07-13 18:06:55,386 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-13 18:06:55,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:06:55,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:06:55,387 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 18:06:55,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-13 18:06:55,455 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2022-07-13 18:06:55,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 18:06:55,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-13 18:06:55,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 18:06:55,535 INFO L134 CoverageAnalysis]: Checked inductivity of 2580 backedges. 246 proven. 374 refuted. 0 times theorem prover too weak. 1960 trivial. 0 not checked. [2022-07-13 18:06:55,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 18:06:56,121 INFO L134 CoverageAnalysis]: Checked inductivity of 2580 backedges. 245 proven. 387 refuted. 0 times theorem prover too weak. 1948 trivial. 0 not checked. [2022-07-13 18:06:56,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981211945] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 18:06:56,121 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 18:06:56,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 12] total 20 [2022-07-13 18:06:56,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450177354] [2022-07-13 18:06:56,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 18:06:56,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-13 18:06:56,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:06:56,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-13 18:06:56,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=252, Unknown=0, NotChecked=0, Total=380 [2022-07-13 18:06:56,123 INFO L87 Difference]: Start difference. First operand 61 states and 75 transitions. Second operand has 20 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 20 states have internal predecessors, (54), 13 states have call successors, (19), 1 states have call predecessors, (19), 6 states have return successors, (23), 13 states have call predecessors, (23), 13 states have call successors, (23) [2022-07-13 18:06:56,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:06:56,250 INFO L93 Difference]: Finished difference Result 121 states and 172 transitions. [2022-07-13 18:06:56,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-13 18:06:56,259 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 20 states have internal predecessors, (54), 13 states have call successors, (19), 1 states have call predecessors, (19), 6 states have return successors, (23), 13 states have call predecessors, (23), 13 states have call successors, (23) Word has length 215 [2022-07-13 18:06:56,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:06:56,260 INFO L225 Difference]: With dead ends: 121 [2022-07-13 18:06:56,260 INFO L226 Difference]: Without dead ends: 0 [2022-07-13 18:06:56,261 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 503 GetRequests, 478 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=162, Invalid=300, Unknown=0, NotChecked=0, Total=462 [2022-07-13 18:06:56,262 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 31 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 18:06:56,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 104 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 18:06:56,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-07-13 18:06:56,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-07-13 18:06:56,263 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) [2022-07-13 18:06:56,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-07-13 18:06:56,263 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 215 [2022-07-13 18:06:56,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:06:56,263 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-07-13 18:06:56,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 20 states have internal predecessors, (54), 13 states have call successors, (19), 1 states have call predecessors, (19), 6 states have return successors, (23), 13 states have call predecessors, (23), 13 states have call successors, (23) [2022-07-13 18:06:56,264 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-07-13 18:06:56,264 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-07-13 18:06:56,266 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-07-13 18:06:56,282 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-13 18:06:56,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:06:56,484 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-07-13 18:06:56,651 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-07-13 18:06:56,651 INFO L899 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2022-07-13 18:06:56,652 INFO L895 garLoopResultBuilder]: At program point L31(lines 25 32) the Hoare annotation is: (<= 5 |ULTIMATE.start_main_~x~0#1|) [2022-07-13 18:06:56,652 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2022-07-13 18:06:56,652 INFO L899 garLoopResultBuilder]: For program point L29(line 29) no Hoare annotation was computed. [2022-07-13 18:06:56,652 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-07-13 18:06:56,652 INFO L899 garLoopResultBuilder]: For program point L28(lines 28 30) no Hoare annotation was computed. [2022-07-13 18:06:56,652 INFO L895 garLoopResultBuilder]: At program point L27(line 27) the Hoare annotation is: (and (<= 5 |ULTIMATE.start_main_~x~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 5)) [2022-07-13 18:06:56,652 INFO L899 garLoopResultBuilder]: For program point L27-1(line 27) no Hoare annotation was computed. [2022-07-13 18:06:56,652 INFO L899 garLoopResultBuilder]: For program point L28-2(lines 28 30) no Hoare annotation was computed. [2022-07-13 18:06:56,652 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 29) no Hoare annotation was computed. [2022-07-13 18:06:56,652 INFO L899 garLoopResultBuilder]: For program point fiboEXIT(lines 7 15) no Hoare annotation was computed. [2022-07-13 18:06:56,652 INFO L899 garLoopResultBuilder]: For program point fiboFINAL(lines 7 15) no Hoare annotation was computed. [2022-07-13 18:06:56,652 INFO L895 garLoopResultBuilder]: At program point L13(line 13) the Hoare annotation is: (and (= fibo_~n |fibo_#in~n|) (not (<= |fibo_#in~n| 1))) [2022-07-13 18:06:56,652 INFO L899 garLoopResultBuilder]: For program point L13-1(line 13) no Hoare annotation was computed. [2022-07-13 18:06:56,652 INFO L895 garLoopResultBuilder]: At program point L13-2(line 13) the Hoare annotation is: (and (let ((.cse0 (= fibo_~n |fibo_#in~n|))) (or (and .cse0 (<= 3 |fibo_#t~ret4|) (<= 5 fibo_~n) (<= |fibo_#t~ret4| 3)) (and (<= 6 fibo_~n) .cse0) (and (<= 4 |fibo_#in~n|) .cse0 (<= |fibo_#t~ret4| 2) (<= 2 |fibo_#t~ret4|) (<= |fibo_#in~n| 4)) (and .cse0 (<= |fibo_#t~ret4| 1) (<= 1 |fibo_#t~ret4|) (<= fibo_~n 3)))) (not (<= |fibo_#in~n| 1))) [2022-07-13 18:06:56,652 INFO L899 garLoopResultBuilder]: For program point L10(lines 10 14) no Hoare annotation was computed. [2022-07-13 18:06:56,652 INFO L899 garLoopResultBuilder]: For program point L13-3(line 13) no Hoare annotation was computed. [2022-07-13 18:06:56,653 INFO L899 garLoopResultBuilder]: For program point L8(lines 8 14) no Hoare annotation was computed. [2022-07-13 18:06:56,653 INFO L902 garLoopResultBuilder]: At program point fiboENTRY(lines 7 15) the Hoare annotation is: true [2022-07-13 18:06:56,655 INFO L356 BasicCegarLoop]: Path program histogram: [6, 1, 1, 1] [2022-07-13 18:06:56,656 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-13 18:06:56,665 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.07 06:06:56 BoogieIcfgContainer [2022-07-13 18:06:56,665 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-13 18:06:56,666 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-13 18:06:56,666 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-13 18:06:56,666 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-13 18:06:56,667 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 06:06:48" (3/4) ... [2022-07-13 18:06:56,668 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-07-13 18:06:56,672 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo [2022-07-13 18:06:56,676 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2022-07-13 18:06:56,677 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2022-07-13 18:06:56,677 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2022-07-13 18:06:56,677 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-07-13 18:06:56,694 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2022-07-13 18:06:56,694 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-13 18:06:56,694 INFO L158 Benchmark]: Toolchain (without parser) took 8502.19ms. Allocated memory was 77.6MB in the beginning and 148.9MB in the end (delta: 71.3MB). Free memory was 51.2MB in the beginning and 100.5MB in the end (delta: -49.3MB). Peak memory consumption was 21.2MB. Max. memory is 16.1GB. [2022-07-13 18:06:56,694 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 77.6MB. Free memory is still 49.7MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-13 18:06:56,695 INFO L158 Benchmark]: CACSL2BoogieTranslator took 165.69ms. Allocated memory was 77.6MB in the beginning and 102.8MB in the end (delta: 25.2MB). Free memory was 51.0MB in the beginning and 73.6MB in the end (delta: -22.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-07-13 18:06:56,695 INFO L158 Benchmark]: Boogie Procedure Inliner took 21.39ms. Allocated memory is still 102.8MB. Free memory was 73.6MB in the beginning and 72.1MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-13 18:06:56,695 INFO L158 Benchmark]: Boogie Preprocessor took 16.19ms. Allocated memory is still 102.8MB. Free memory was 72.1MB in the beginning and 71.4MB in the end (delta: 744.2kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-13 18:06:56,695 INFO L158 Benchmark]: RCFGBuilder took 173.87ms. Allocated memory is still 102.8MB. Free memory was 71.1MB in the beginning and 62.8MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-13 18:06:56,696 INFO L158 Benchmark]: TraceAbstraction took 8092.48ms. Allocated memory was 102.8MB in the beginning and 148.9MB in the end (delta: 46.1MB). Free memory was 62.1MB in the beginning and 102.6MB in the end (delta: -40.5MB). Peak memory consumption was 71.2MB. Max. memory is 16.1GB. [2022-07-13 18:06:56,696 INFO L158 Benchmark]: Witness Printer took 27.92ms. Allocated memory is still 148.9MB. Free memory was 102.6MB in the beginning and 100.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-13 18:06:56,697 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 77.6MB. Free memory is still 49.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 165.69ms. Allocated memory was 77.6MB in the beginning and 102.8MB in the end (delta: 25.2MB). Free memory was 51.0MB in the beginning and 73.6MB in the end (delta: -22.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 21.39ms. Allocated memory is still 102.8MB. Free memory was 73.6MB in the beginning and 72.1MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 16.19ms. Allocated memory is still 102.8MB. Free memory was 72.1MB in the beginning and 71.4MB in the end (delta: 744.2kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 173.87ms. Allocated memory is still 102.8MB. Free memory was 71.1MB in the beginning and 62.8MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 8092.48ms. Allocated memory was 102.8MB in the beginning and 148.9MB in the end (delta: 46.1MB). Free memory was 62.1MB in the beginning and 102.6MB in the end (delta: -40.5MB). Peak memory consumption was 71.2MB. Max. memory is 16.1GB. * Witness Printer took 27.92ms. Allocated memory is still 148.9MB. Free memory was 102.6MB in the beginning and 100.5MB 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: 29]: 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, 20 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 8.0s, OverallIterations: 9, TraceHistogramMax: 31, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 380 SdHoareTripleChecker+Valid, 0.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 340 mSDsluCounter, 1038 SdHoareTripleChecker+Invalid, 0.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 855 mSDsCounter, 302 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1379 IncrementalHoareTripleChecker+Invalid, 1681 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 302 mSolverCounterUnsat, 183 mSDtfsCounter, 1379 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1470 GetRequests, 1294 SyntacticMatches, 29 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1095 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=61occurred in iteration=8, InterpolantAutomatonStates: 99, 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, 9 MinimizatonAttempts, 29 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 122 PreInvPairs, 160 NumberOfFragments, 74 HoareAnnotationTreeSize, 122 FomulaSimplifications, 222 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 5 FomulaSimplificationsInter, 833 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 4.5s InterpolantComputationTime, 1201 NumberOfCodeBlocks, 1047 NumberOfCodeBlocksAsserted, 45 NumberOfCheckSat, 1768 ConstructedInterpolants, 0 QuantifiedInterpolants, 4485 SizeOfPredicates, 23 NumberOfNonLiveVariables, 1106 ConjunctsInSsa, 133 ConjunctsInUnsatCore, 23 InterpolantComputations, 2 PerfectInterpolantSequences, 9712/12474 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: 25]: Loop Invariant Derived loop invariant: 5 <= x RESULT: Ultimate proved your program to be correct! [2022-07-13 18:06:56,722 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