./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/id2_b3_o2.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/id2_b3_o2.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 f23c4102cc8cffc1c4a7a8ad49a8497c74f47f44c37be04f4ed5f1ca619fac2a --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 18:07:02,261 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 18:07:02,263 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 18:07:02,311 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 18:07:02,312 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 18:07:02,313 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 18:07:02,315 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 18:07:02,320 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 18:07:02,322 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 18:07:02,326 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 18:07:02,327 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 18:07:02,329 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 18:07:02,329 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 18:07:02,331 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 18:07:02,333 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 18:07:02,336 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 18:07:02,336 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 18:07:02,338 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 18:07:02,339 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 18:07:02,344 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 18:07:02,346 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 18:07:02,347 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 18:07:02,347 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 18:07:02,348 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 18:07:02,349 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 18:07:02,356 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 18:07:02,356 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 18:07:02,357 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 18:07:02,358 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 18:07:02,358 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 18:07:02,359 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 18:07:02,359 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 18:07:02,361 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 18:07:02,361 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 18:07:02,362 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 18:07:02,364 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 18:07:02,364 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 18:07:02,364 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 18:07:02,365 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 18:07:02,365 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 18:07:02,365 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 18:07:02,367 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 18:07:02,368 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 18:07:02,405 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 18:07:02,405 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 18:07:02,406 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 18:07:02,406 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 18:07:02,406 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 18:07:02,407 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 18:07:02,407 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 18:07:02,407 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 18:07:02,408 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 18:07:02,408 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 18:07:02,409 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 18:07:02,409 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 18:07:02,409 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 18:07:02,409 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 18:07:02,409 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 18:07:02,409 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 18:07:02,410 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 18:07:02,410 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 18:07:02,410 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 18:07:02,410 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 18:07:02,410 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 18:07:02,411 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 18:07:02,411 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 18:07:02,411 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 18:07:02,411 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 18:07:02,411 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 18:07:02,412 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 18:07:02,412 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 18:07:02,412 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 18:07:02,412 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 18:07:02,413 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 18:07:02,413 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 18:07:02,413 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 18:07:02,413 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f23c4102cc8cffc1c4a7a8ad49a8497c74f47f44c37be04f4ed5f1ca619fac2a [2022-07-13 18:07:02,635 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 18:07:02,652 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 18:07:02,655 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 18:07:02,656 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 18:07:02,656 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 18:07:02,657 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/id2_b3_o2.c [2022-07-13 18:07:02,731 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/52c33abe1/b81e2c362c404845b7b7f0dc694082ab/FLAG121773cf7 [2022-07-13 18:07:03,108 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 18:07:03,109 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/id2_b3_o2.c [2022-07-13 18:07:03,112 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/52c33abe1/b81e2c362c404845b7b7f0dc694082ab/FLAG121773cf7 [2022-07-13 18:07:03,122 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/52c33abe1/b81e2c362c404845b7b7f0dc694082ab [2022-07-13 18:07:03,124 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 18:07:03,126 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 18:07:03,129 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 18:07:03,129 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 18:07:03,132 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 18:07:03,133 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 06:07:03" (1/1) ... [2022-07-13 18:07:03,134 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b97547b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:07:03, skipping insertion in model container [2022-07-13 18:07:03,134 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 06:07:03" (1/1) ... [2022-07-13 18:07:03,139 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 18:07:03,151 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 18:07:03,287 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/id2_b3_o2.c[771,784] [2022-07-13 18:07:03,290 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 18:07:03,296 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 18:07:03,313 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/id2_b3_o2.c[771,784] [2022-07-13 18:07:03,313 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 18:07:03,326 INFO L208 MainTranslator]: Completed translation [2022-07-13 18:07:03,327 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:07:03 WrapperNode [2022-07-13 18:07:03,327 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 18:07:03,328 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 18:07:03,328 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 18:07:03,329 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 18:07:03,335 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:07:03" (1/1) ... [2022-07-13 18:07:03,341 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:07:03" (1/1) ... [2022-07-13 18:07:03,355 INFO L137 Inliner]: procedures = 14, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 19 [2022-07-13 18:07:03,356 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 18:07:03,357 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 18:07:03,357 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 18:07:03,357 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 18:07:03,364 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:07:03" (1/1) ... [2022-07-13 18:07:03,364 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:07:03" (1/1) ... [2022-07-13 18:07:03,367 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:07:03" (1/1) ... [2022-07-13 18:07:03,367 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:07:03" (1/1) ... [2022-07-13 18:07:03,370 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:07:03" (1/1) ... [2022-07-13 18:07:03,373 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:07:03" (1/1) ... [2022-07-13 18:07:03,378 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:07:03" (1/1) ... [2022-07-13 18:07:03,383 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 18:07:03,384 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 18:07:03,385 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 18:07:03,385 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 18:07:03,386 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:07:03" (1/1) ... [2022-07-13 18:07:03,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 18:07:03,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:07:03,421 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 18:07:03,429 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 18:07:03,468 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 18:07:03,468 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 18:07:03,469 INFO L130 BoogieDeclarations]: Found specification of procedure id2 [2022-07-13 18:07:03,469 INFO L138 BoogieDeclarations]: Found implementation of procedure id2 [2022-07-13 18:07:03,469 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 18:07:03,469 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 18:07:03,469 INFO L130 BoogieDeclarations]: Found specification of procedure id [2022-07-13 18:07:03,469 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2022-07-13 18:07:03,523 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 18:07:03,524 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 18:07:03,603 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 18:07:03,609 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 18:07:03,609 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-07-13 18:07:03,611 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 06:07:03 BoogieIcfgContainer [2022-07-13 18:07:03,611 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 18:07:03,613 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 18:07:03,613 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 18:07:03,616 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 18:07:03,616 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 06:07:03" (1/3) ... [2022-07-13 18:07:03,617 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f42dc33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 06:07:03, skipping insertion in model container [2022-07-13 18:07:03,617 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:07:03" (2/3) ... [2022-07-13 18:07:03,617 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f42dc33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 06:07:03, skipping insertion in model container [2022-07-13 18:07:03,617 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 06:07:03" (3/3) ... [2022-07-13 18:07:03,619 INFO L111 eAbstractionObserver]: Analyzing ICFG id2_b3_o2.c [2022-07-13 18:07:03,631 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 18:07:03,631 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 18:07:03,682 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 18:07:03,701 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@4c35ad7, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@443cf7b3 [2022-07-13 18:07:03,701 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-13 18:07:03,709 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-13 18:07:03,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-13 18:07:03,731 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:07:03,732 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:07:03,733 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:07:03,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:07:03,738 INFO L85 PathProgramCache]: Analyzing trace with hash 794002500, now seen corresponding path program 1 times [2022-07-13 18:07:03,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:07:03,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075512127] [2022-07-13 18:07:03,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:07:03,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:07:03,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:03,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:03,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:04,005 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 18:07:04,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:07:04,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075512127] [2022-07-13 18:07:04,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075512127] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:07:04,008 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:07:04,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 18:07:04,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841130298] [2022-07-13 18:07:04,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:07:04,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 18:07:04,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:07:04,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 18:07:04,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 18:07:04,041 INFO L87 Difference]: Start difference. First operand has 24 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 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 18:07:04,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:07:04,081 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2022-07-13 18:07:04,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 18:07:04,085 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 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 18:07:04,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:07:04,092 INFO L225 Difference]: With dead ends: 36 [2022-07-13 18:07:04,097 INFO L226 Difference]: Without dead ends: 23 [2022-07-13 18:07:04,099 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 18:07:04,102 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 3 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 18:07:04,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 96 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 18:07:04,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-07-13 18:07:04,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-07-13 18:07:04,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-13 18:07:04,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2022-07-13 18:07:04,137 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 10 [2022-07-13 18:07:04,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:07:04,137 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2022-07-13 18:07:04,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 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 18:07:04,138 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2022-07-13 18:07:04,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-13 18:07:04,139 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:07:04,139 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:07:04,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 18:07:04,140 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:07:04,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:07:04,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1040166181, now seen corresponding path program 1 times [2022-07-13 18:07:04,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:07:04,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83575181] [2022-07-13 18:07:04,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:07:04,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:07:04,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:04,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:04,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:04,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:04,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:04,252 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 18:07:04,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:07:04,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83575181] [2022-07-13 18:07:04,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83575181] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:07:04,253 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:07:04,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 18:07:04,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353544734] [2022-07-13 18:07:04,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:07:04,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 18:07:04,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:07:04,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 18:07:04,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 18:07:04,256 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-13 18:07:04,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:07:04,275 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2022-07-13 18:07:04,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 18:07:04,275 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-07-13 18:07:04,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:07:04,277 INFO L225 Difference]: With dead ends: 41 [2022-07-13 18:07:04,277 INFO L226 Difference]: Without dead ends: 29 [2022-07-13 18:07:04,277 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 18:07:04,279 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 2 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 18:07:04,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 94 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 18:07:04,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-07-13 18:07:04,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2022-07-13 18:07:04,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-13 18:07:04,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-07-13 18:07:04,286 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 17 [2022-07-13 18:07:04,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:07:04,287 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-07-13 18:07:04,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-13 18:07:04,287 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-07-13 18:07:04,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-13 18:07:04,288 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:07:04,288 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:07:04,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 18:07:04,289 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:07:04,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:07:04,290 INFO L85 PathProgramCache]: Analyzing trace with hash 1068795332, now seen corresponding path program 1 times [2022-07-13 18:07:04,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:07:04,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548852010] [2022-07-13 18:07:04,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:07:04,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:07:04,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:04,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:04,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:04,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:04,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:04,452 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 18:07:04,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:07:04,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548852010] [2022-07-13 18:07:04,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548852010] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:07:04,453 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:07:04,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-13 18:07:04,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633609193] [2022-07-13 18:07:04,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:07:04,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-13 18:07:04,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:07:04,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-13 18:07:04,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-13 18:07:04,455 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 8 states, 8 states have (on average 1.625) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-13 18:07:04,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:07:04,498 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2022-07-13 18:07:04,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-13 18:07:04,498 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-07-13 18:07:04,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:07:04,499 INFO L225 Difference]: With dead ends: 33 [2022-07-13 18:07:04,499 INFO L226 Difference]: Without dead ends: 29 [2022-07-13 18:07:04,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-13 18:07:04,501 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 2 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 18:07:04,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 154 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 18:07:04,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-07-13 18:07:04,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2022-07-13 18:07:04,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-13 18:07:04,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-07-13 18:07:04,506 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 17 [2022-07-13 18:07:04,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:07:04,507 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-07-13 18:07:04,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-13 18:07:04,507 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-07-13 18:07:04,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-13 18:07:04,508 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:07:04,508 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:07:04,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-13 18:07:04,509 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:07:04,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:07:04,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1632008158, now seen corresponding path program 1 times [2022-07-13 18:07:04,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:07:04,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940815268] [2022-07-13 18:07:04,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:07:04,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:07:04,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:04,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:04,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:04,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:04,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:04,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:04,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:04,657 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 18:07:04,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:07:04,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940815268] [2022-07-13 18:07:04,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940815268] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:07:04,658 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:07:04,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 18:07:04,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746941992] [2022-07-13 18:07:04,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:07:04,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 18:07:04,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:07:04,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 18:07:04,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 18:07:04,680 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-13 18:07:04,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:07:04,697 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2022-07-13 18:07:04,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 18:07:04,698 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2022-07-13 18:07:04,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:07:04,709 INFO L225 Difference]: With dead ends: 45 [2022-07-13 18:07:04,709 INFO L226 Difference]: Without dead ends: 33 [2022-07-13 18:07:04,709 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 18:07:04,711 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 2 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 18:07:04,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 94 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 18:07:04,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-07-13 18:07:04,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2022-07-13 18:07:04,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 3 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-13 18:07:04,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2022-07-13 18:07:04,717 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 24 [2022-07-13 18:07:04,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:07:04,717 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2022-07-13 18:07:04,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-13 18:07:04,717 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2022-07-13 18:07:04,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-13 18:07:04,718 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:07:04,720 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:07:04,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-13 18:07:04,720 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:07:04,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:07:04,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1435494653, now seen corresponding path program 1 times [2022-07-13 18:07:04,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:07:04,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591776620] [2022-07-13 18:07:04,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:07:04,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:07:04,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:04,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:04,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:04,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:04,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:04,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:07:04,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:07:04,930 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 18:07:04,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:07:04,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591776620] [2022-07-13 18:07:04,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591776620] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:07:04,933 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:07:04,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-13 18:07:04,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435129753] [2022-07-13 18:07:04,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:07:04,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-13 18:07:04,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:07:04,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-13 18:07:04,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-13 18:07:04,939 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 6 states have internal predecessors, (17), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-13 18:07:04,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:07:04,999 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2022-07-13 18:07:05,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-13 18:07:05,001 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 6 states have internal predecessors, (17), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2022-07-13 18:07:05,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:07:05,003 INFO L225 Difference]: With dead ends: 49 [2022-07-13 18:07:05,003 INFO L226 Difference]: Without dead ends: 37 [2022-07-13 18:07:05,004 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-13 18:07:05,006 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 4 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 18:07:05,010 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 172 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 18:07:05,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-07-13 18:07:05,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2022-07-13 18:07:05,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 25 states have (on average 1.16) internal successors, (29), 26 states have internal predecessors, (29), 3 states have call successors, (3), 2 states have call predecessors, (3), 6 states have return successors, (7), 6 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-13 18:07:05,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2022-07-13 18:07:05,020 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 24 [2022-07-13 18:07:05,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:07:05,020 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2022-07-13 18:07:05,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 6 states have internal predecessors, (17), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-13 18:07:05,021 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2022-07-13 18:07:05,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-13 18:07:05,023 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:07:05,023 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:07:05,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-13 18:07:05,023 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:07:05,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:07:05,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1464123804, now seen corresponding path program 1 times [2022-07-13 18:07:05,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:07:05,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379691771] [2022-07-13 18:07:05,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:07:05,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:07:05,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 18:07:05,044 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 18:07:05,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 18:07:05,078 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 18:07:05,082 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-13 18:07:05,083 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-07-13 18:07:05,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-13 18:07:05,088 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-13 18:07:05,091 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-13 18:07:05,124 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.07 06:07:05 BoogieIcfgContainer [2022-07-13 18:07:05,124 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-13 18:07:05,125 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-13 18:07:05,125 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-13 18:07:05,125 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-13 18:07:05,126 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 06:07:03" (3/4) ... [2022-07-13 18:07:05,127 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-07-13 18:07:05,171 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2022-07-13 18:07:05,172 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-13 18:07:05,172 INFO L158 Benchmark]: Toolchain (without parser) took 2046.67ms. Allocated memory was 90.2MB in the beginning and 109.1MB in the end (delta: 18.9MB). Free memory was 58.8MB in the beginning and 61.0MB in the end (delta: -2.1MB). Peak memory consumption was 16.4MB. Max. memory is 16.1GB. [2022-07-13 18:07:05,173 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 90.2MB. Free memory was 47.8MB in the beginning and 47.8MB in the end (delta: 38.7kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-13 18:07:05,173 INFO L158 Benchmark]: CACSL2BoogieTranslator took 198.61ms. Allocated memory is still 90.2MB. Free memory was 58.7MB in the beginning and 67.4MB in the end (delta: -8.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-13 18:07:05,173 INFO L158 Benchmark]: Boogie Procedure Inliner took 27.37ms. Allocated memory is still 90.2MB. Free memory was 67.4MB in the beginning and 66.0MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-13 18:07:05,173 INFO L158 Benchmark]: Boogie Preprocessor took 26.46ms. Allocated memory is still 90.2MB. Free memory was 66.0MB in the beginning and 65.2MB in the end (delta: 780.9kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-13 18:07:05,174 INFO L158 Benchmark]: RCFGBuilder took 226.98ms. Allocated memory is still 90.2MB. Free memory was 64.9MB in the beginning and 55.9MB in the end (delta: 9.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-07-13 18:07:05,174 INFO L158 Benchmark]: TraceAbstraction took 1511.84ms. Allocated memory was 90.2MB in the beginning and 109.1MB in the end (delta: 18.9MB). Free memory was 55.5MB in the beginning and 63.1MB in the end (delta: -7.5MB). Peak memory consumption was 13.0MB. Max. memory is 16.1GB. [2022-07-13 18:07:05,174 INFO L158 Benchmark]: Witness Printer took 46.81ms. Allocated memory is still 109.1MB. Free memory was 63.1MB in the beginning and 61.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-13 18:07:05,177 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 90.2MB. Free memory was 47.8MB in the beginning and 47.8MB in the end (delta: 38.7kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 198.61ms. Allocated memory is still 90.2MB. Free memory was 58.7MB in the beginning and 67.4MB in the end (delta: -8.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 27.37ms. Allocated memory is still 90.2MB. Free memory was 67.4MB in the beginning and 66.0MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 26.46ms. Allocated memory is still 90.2MB. Free memory was 66.0MB in the beginning and 65.2MB in the end (delta: 780.9kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 226.98ms. Allocated memory is still 90.2MB. Free memory was 64.9MB in the beginning and 55.9MB in the end (delta: 9.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 1511.84ms. Allocated memory was 90.2MB in the beginning and 109.1MB in the end (delta: 18.9MB). Free memory was 55.5MB in the beginning and 63.1MB in the end (delta: -7.5MB). Peak memory consumption was 13.0MB. Max. memory is 16.1GB. * Witness Printer took 46.81ms. Allocated memory is still 109.1MB. Free memory was 63.1MB in the beginning and 61.0MB 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 - CounterExampleResult [Line: 27]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L24] unsigned int input = __VERIFIER_nondet_uint(); [L25] CALL, EXPR id(input) VAL [\old(x)=2] [L10] COND FALSE !(x==0) VAL [\old(x)=2, x=2] [L11] CALL, EXPR id2(x-1) VAL [\old(x)=1] [L17] COND FALSE !(x==0) VAL [\old(x)=1, x=1] [L18] CALL, EXPR id(x-1) VAL [\old(x)=0] [L10] COND TRUE x==0 [L10] return 0; VAL [\old(x)=0, \result=0, x=0] [L18] RET, EXPR id(x-1) VAL [\old(x)=1, id(x-1)=0, x=1] [L18] unsigned int ret = id(x-1) + 1; [L19] COND FALSE !(ret > 3) [L20] return ret; VAL [\old(x)=1, \result=1, ret=1, x=1] [L11] RET, EXPR id2(x-1) VAL [\old(x)=2, id2(x-1)=1, x=2] [L11] unsigned int ret = id2(x-1) + 1; [L12] COND FALSE !(ret > 3) [L13] return ret; VAL [\old(x)=2, \result=2, ret=2, x=2] [L25] RET, EXPR id(input) VAL [id(input)=2, input=2] [L25] unsigned int result = id(input); [L26] COND TRUE result == 2 VAL [input=2, result=2] [L27] reach_error() VAL [input=2, result=2] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.4s, OverallIterations: 6, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 13 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 13 mSDsluCounter, 610 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 483 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 108 IncrementalHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 127 mSDtfsCounter, 108 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 59 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=35occurred in iteration=5, InterpolantAutomatonStates: 31, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 8 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 116 NumberOfCodeBlocks, 116 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 87 ConstructedInterpolants, 0 QuantifiedInterpolants, 267 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 PerfectInterpolantSequences, 8/8 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-07-13 18:07:05,221 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 Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE