./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/id_i15_o15-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursive-simple/id_i15_o15-2.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 109f1b0f7b496206cc9c53b0a3b6a7c393044a874053b245259453c5fb39b930 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 17:32:06,065 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 17:32:06,067 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 17:32:06,102 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 17:32:06,102 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 17:32:06,103 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 17:32:06,105 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 17:32:06,106 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 17:32:06,108 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 17:32:06,111 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 17:32:06,112 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 17:32:06,114 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 17:32:06,114 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 17:32:06,116 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 17:32:06,117 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 17:32:06,119 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 17:32:06,120 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 17:32:06,121 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 17:32:06,122 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 17:32:06,126 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 17:32:06,127 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 17:32:06,128 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 17:32:06,128 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 17:32:06,129 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 17:32:06,130 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 17:32:06,132 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 17:32:06,132 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 17:32:06,133 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 17:32:06,133 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 17:32:06,134 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 17:32:06,134 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 17:32:06,135 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 17:32:06,136 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 17:32:06,136 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 17:32:06,137 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 17:32:06,137 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 17:32:06,137 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 17:32:06,138 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 17:32:06,139 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 17:32:06,139 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 17:32:06,139 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 17:32:06,140 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 17:32:06,141 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 17:32:06,166 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 17:32:06,167 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 17:32:06,167 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 17:32:06,167 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 17:32:06,168 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 17:32:06,168 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 17:32:06,168 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 17:32:06,168 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 17:32:06,168 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 17:32:06,169 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 17:32:06,169 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 17:32:06,170 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 17:32:06,170 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 17:32:06,170 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 17:32:06,170 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 17:32:06,170 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 17:32:06,170 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 17:32:06,170 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 17:32:06,170 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 17:32:06,171 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 17:32:06,171 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 17:32:06,171 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 17:32:06,171 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 17:32:06,171 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 17:32:06,171 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 17:32:06,172 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 17:32:06,172 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 17:32:06,172 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 17:32:06,172 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 17:32:06,172 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 17:32:06,172 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 17:32:06,173 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 17:32:06,173 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 17:32:06,173 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 109f1b0f7b496206cc9c53b0a3b6a7c393044a874053b245259453c5fb39b930 [2022-07-19 17:32:06,329 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 17:32:06,343 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 17:32:06,345 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 17:32:06,345 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 17:32:06,346 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 17:32:06,347 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/id_i15_o15-2.c [2022-07-19 17:32:06,408 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5061f2b2a/8759acbbc3694e179b3ef39ee293f28b/FLAGa196253cf [2022-07-19 17:32:06,787 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 17:32:06,788 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/id_i15_o15-2.c [2022-07-19 17:32:06,791 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5061f2b2a/8759acbbc3694e179b3ef39ee293f28b/FLAGa196253cf [2022-07-19 17:32:07,207 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5061f2b2a/8759acbbc3694e179b3ef39ee293f28b [2022-07-19 17:32:07,209 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 17:32:07,210 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 17:32:07,211 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 17:32:07,211 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 17:32:07,213 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 17:32:07,214 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 05:32:07" (1/1) ... [2022-07-19 17:32:07,214 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e043ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:32:07, skipping insertion in model container [2022-07-19 17:32:07,214 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 05:32:07" (1/1) ... [2022-07-19 17:32:07,219 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 17:32:07,226 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 17:32:07,349 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/id_i15_o15-2.c[454,467] [2022-07-19 17:32:07,351 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 17:32:07,357 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 17:32:07,365 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/id_i15_o15-2.c[454,467] [2022-07-19 17:32:07,366 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 17:32:07,389 INFO L208 MainTranslator]: Completed translation [2022-07-19 17:32:07,390 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:32:07 WrapperNode [2022-07-19 17:32:07,390 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 17:32:07,391 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 17:32:07,391 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 17:32:07,391 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 17:32:07,398 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:32:07" (1/1) ... [2022-07-19 17:32:07,402 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:32:07" (1/1) ... [2022-07-19 17:32:07,415 INFO L137 Inliner]: procedures = 13, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 19 [2022-07-19 17:32:07,416 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 17:32:07,417 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 17:32:07,417 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 17:32:07,417 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 17:32:07,423 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:32:07" (1/1) ... [2022-07-19 17:32:07,424 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:32:07" (1/1) ... [2022-07-19 17:32:07,424 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:32:07" (1/1) ... [2022-07-19 17:32:07,425 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:32:07" (1/1) ... [2022-07-19 17:32:07,426 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:32:07" (1/1) ... [2022-07-19 17:32:07,428 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:32:07" (1/1) ... [2022-07-19 17:32:07,429 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:32:07" (1/1) ... [2022-07-19 17:32:07,430 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 17:32:07,431 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 17:32:07,432 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 17:32:07,432 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 17:32:07,432 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:32:07" (1/1) ... [2022-07-19 17:32:07,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 17:32:07,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 17:32:07,462 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-19 17:32:07,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-19 17:32:07,511 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 17:32:07,511 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 17:32:07,511 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 17:32:07,512 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 17:32:07,512 INFO L130 BoogieDeclarations]: Found specification of procedure id [2022-07-19 17:32:07,512 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2022-07-19 17:32:07,550 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 17:32:07,551 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 17:32:07,631 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 17:32:07,635 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 17:32:07,635 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-07-19 17:32:07,636 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 05:32:07 BoogieIcfgContainer [2022-07-19 17:32:07,637 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 17:32:07,639 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 17:32:07,639 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 17:32:07,641 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 17:32:07,641 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 05:32:07" (1/3) ... [2022-07-19 17:32:07,642 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60d95e04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 05:32:07, skipping insertion in model container [2022-07-19 17:32:07,642 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:32:07" (2/3) ... [2022-07-19 17:32:07,642 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60d95e04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 05:32:07, skipping insertion in model container [2022-07-19 17:32:07,642 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 05:32:07" (3/3) ... [2022-07-19 17:32:07,643 INFO L111 eAbstractionObserver]: Analyzing ICFG id_i15_o15-2.c [2022-07-19 17:32:07,652 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 17:32:07,652 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 17:32:07,696 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 17:32:07,704 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@3f9a9ed2, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@15d6296a [2022-07-19 17:32:07,705 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 17:32:07,708 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-19 17:32:07,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-19 17:32:07,724 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:32:07,725 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:32:07,725 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:32:07,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:32:07,731 INFO L85 PathProgramCache]: Analyzing trace with hash -358017204, now seen corresponding path program 1 times [2022-07-19 17:32:07,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:32:07,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043993886] [2022-07-19 17:32:07,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:32:07,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:32:07,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:32:07,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:32:07,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:32:07,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 17:32:07,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:32:07,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043993886] [2022-07-19 17:32:07,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043993886] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 17:32:07,854 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 17:32:07,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 17:32:07,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144459246] [2022-07-19 17:32:07,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 17:32:07,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 17:32:07,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:32:07,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 17:32:07,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 17:32:07,896 INFO L87 Difference]: Start difference. First operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 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) [2022-07-19 17:32:07,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:32:07,943 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2022-07-19 17:32:07,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 17:32:07,957 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 [2022-07-19 17:32:07,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:32:07,962 INFO L225 Difference]: With dead ends: 25 [2022-07-19 17:32:07,964 INFO L226 Difference]: Without dead ends: 15 [2022-07-19 17:32:07,967 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 [2022-07-19 17:32:07,975 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 11 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 17:32:07,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 35 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 17:32:08,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-07-19 17:32:08,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-07-19 17:32:08,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 11 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-19 17:32:08,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2022-07-19 17:32:08,043 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2022-07-19 17:32:08,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:32:08,044 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2022-07-19 17:32:08,044 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) [2022-07-19 17:32:08,045 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2022-07-19 17:32:08,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-19 17:32:08,047 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:32:08,047 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:32:08,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 17:32:08,048 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:32:08,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:32:08,048 INFO L85 PathProgramCache]: Analyzing trace with hash 679465686, now seen corresponding path program 1 times [2022-07-19 17:32:08,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:32:08,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045011664] [2022-07-19 17:32:08,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:32:08,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:32:08,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:32:08,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:32:08,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:32:08,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:32:08,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:32:08,153 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 17:32:08,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:32:08,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045011664] [2022-07-19 17:32:08,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045011664] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 17:32:08,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055897410] [2022-07-19 17:32:08,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:32:08,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:32:08,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 17:32:08,157 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) [2022-07-19 17:32:08,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 17:32:08,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:32:08,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-19 17:32:08,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 17:32:08,256 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 17:32:08,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 17:32:08,372 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 17:32:08,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055897410] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 17:32:08,373 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 17:32:08,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 12 [2022-07-19 17:32:08,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710446709] [2022-07-19 17:32:08,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 17:32:08,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-19 17:32:08,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:32:08,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-19 17:32:08,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-07-19 17:32:08,376 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 12 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 12 states have internal predecessors, (21), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (6), 2 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-19 17:32:08,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:32:08,408 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2022-07-19 17:32:08,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 17:32:08,409 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 12 states have internal predecessors, (21), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (6), 2 states have call predecessors, (6), 6 states have call successors, (6) Word has length 16 [2022-07-19 17:32:08,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:32:08,409 INFO L225 Difference]: With dead ends: 22 [2022-07-19 17:32:08,409 INFO L226 Difference]: Without dead ends: 18 [2022-07-19 17:32:08,410 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2022-07-19 17:32:08,411 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 31 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 17:32:08,412 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 28 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 17:32:08,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-07-19 17:32:08,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-07-19 17:32:08,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 13 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-19 17:32:08,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2022-07-19 17:32:08,415 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2022-07-19 17:32:08,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:32:08,416 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2022-07-19 17:32:08,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 12 states have internal predecessors, (21), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (6), 2 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-19 17:32:08,416 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2022-07-19 17:32:08,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-19 17:32:08,417 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:32:08,417 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:32:08,434 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-19 17:32:08,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:32:08,630 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:32:08,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:32:08,631 INFO L85 PathProgramCache]: Analyzing trace with hash -41010676, now seen corresponding path program 2 times [2022-07-19 17:32:08,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:32:08,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883773051] [2022-07-19 17:32:08,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:32:08,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:32:08,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:32:08,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:32:08,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:32:08,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:32:08,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:32:08,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:32:08,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:32:08,745 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-19 17:32:08,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:32:08,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883773051] [2022-07-19 17:32:08,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883773051] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 17:32:08,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474744025] [2022-07-19 17:32:08,745 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 17:32:08,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:32:08,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 17:32:08,747 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) [2022-07-19 17:32:08,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 17:32:08,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 17:32:08,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 17:32:08,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 17:32:08,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 17:32:08,832 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-19 17:32:08,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 17:32:09,073 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-19 17:32:09,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474744025] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 17:32:09,073 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 17:32:09,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 9] total 14 [2022-07-19 17:32:09,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058213695] [2022-07-19 17:32:09,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 17:32:09,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-19 17:32:09,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:32:09,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-19 17:32:09,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-07-19 17:32:09,077 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 14 states, 11 states have (on average 2.272727272727273) internal successors, (25), 14 states have internal predecessors, (25), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (9), 3 states have call predecessors, (9), 7 states have call successors, (9) [2022-07-19 17:32:09,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:32:09,127 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2022-07-19 17:32:09,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 17:32:09,128 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 2.272727272727273) internal successors, (25), 14 states have internal predecessors, (25), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (9), 3 states have call predecessors, (9), 7 states have call successors, (9) Word has length 22 [2022-07-19 17:32:09,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:32:09,129 INFO L225 Difference]: With dead ends: 25 [2022-07-19 17:32:09,129 INFO L226 Difference]: Without dead ends: 21 [2022-07-19 17:32:09,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2022-07-19 17:32:09,132 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 27 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 17:32:09,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 51 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 17:32:09,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-07-19 17:32:09,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-07-19 17:32:09,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 15 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-19 17:32:09,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2022-07-19 17:32:09,141 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 22 [2022-07-19 17:32:09,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:32:09,141 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2022-07-19 17:32:09,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 2.272727272727273) internal successors, (25), 14 states have internal predecessors, (25), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (9), 3 states have call predecessors, (9), 7 states have call successors, (9) [2022-07-19 17:32:09,141 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2022-07-19 17:32:09,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-19 17:32:09,143 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:32:09,143 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:32:09,162 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-19 17:32:09,359 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,SelfDestructingSolverStorable2 [2022-07-19 17:32:09,359 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:32:09,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:32:09,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1769866774, now seen corresponding path program 3 times [2022-07-19 17:32:09,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:32:09,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466000888] [2022-07-19 17:32:09,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:32:09,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:32:09,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:32:09,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:32:09,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:32:09,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:32:09,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:32:09,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:32:09,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:32:09,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:32:09,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:32:09,469 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-19 17:32:09,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:32:09,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466000888] [2022-07-19 17:32:09,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466000888] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 17:32:09,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769943376] [2022-07-19 17:32:09,470 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 17:32:09,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:32:09,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 17:32:09,487 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) [2022-07-19 17:32:09,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 17:32:09,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-19 17:32:09,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 17:32:09,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-19 17:32:09,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 17:32:09,607 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-19 17:32:09,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 17:32:09,894 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-19 17:32:09,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769943376] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 17:32:09,894 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 17:32:09,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 11] total 26 [2022-07-19 17:32:09,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265808080] [2022-07-19 17:32:09,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 17:32:09,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-19 17:32:09,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:32:09,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-19 17:32:09,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2022-07-19 17:32:09,896 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 26 states, 25 states have (on average 1.52) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (4), 1 states have call predecessors, (4), 12 states have return successors, (12), 12 states have call predecessors, (12), 3 states have call successors, (12) [2022-07-19 17:32:10,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:32:10,096 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2022-07-19 17:32:10,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-19 17:32:10,097 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.52) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (4), 1 states have call predecessors, (4), 12 states have return successors, (12), 12 states have call predecessors, (12), 3 states have call successors, (12) Word has length 28 [2022-07-19 17:32:10,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:32:10,097 INFO L225 Difference]: With dead ends: 39 [2022-07-19 17:32:10,098 INFO L226 Difference]: Without dead ends: 33 [2022-07-19 17:32:10,098 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=252, Invalid=1388, Unknown=0, NotChecked=0, Total=1640 [2022-07-19 17:32:10,099 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 13 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 17:32:10,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 81 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 17:32:10,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-07-19 17:32:10,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-07-19 17:32:10,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 23 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (9), 8 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-19 17:32:10,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2022-07-19 17:32:10,105 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 28 [2022-07-19 17:32:10,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:32:10,105 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2022-07-19 17:32:10,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.52) internal successors, (38), 18 states have internal predecessors, (38), 3 states have call successors, (4), 1 states have call predecessors, (4), 12 states have return successors, (12), 12 states have call predecessors, (12), 3 states have call successors, (12) [2022-07-19 17:32:10,105 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2022-07-19 17:32:10,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-19 17:32:10,106 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:32:10,106 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:32:10,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-19 17:32:10,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:32:10,321 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:32:10,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:32:10,322 INFO L85 PathProgramCache]: Analyzing trace with hash -626238314, now seen corresponding path program 4 times [2022-07-19 17:32:10,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:32:10,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019762629] [2022-07-19 17:32:10,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:32:10,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:32:10,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:32:10,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:32:10,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:32:10,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:32:10,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:32:10,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:32:10,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:32:10,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:32:10,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:32:10,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:32:10,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:32:10,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:32:10,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:32:10,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:32:10,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:32:10,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:32:10,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:32:10,553 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-07-19 17:32:10,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:32:10,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019762629] [2022-07-19 17:32:10,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019762629] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 17:32:10,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083843984] [2022-07-19 17:32:10,554 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 17:32:10,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:32:10,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 17:32:10,555 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) [2022-07-19 17:32:10,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 17:32:10,611 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 17:32:10,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 17:32:10,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-19 17:32:10,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 17:32:10,695 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-07-19 17:32:10,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 17:32:12,223 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-19 17:32:12,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083843984] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 17:32:12,223 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 17:32:12,224 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 19] total 24 [2022-07-19 17:32:12,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138297247] [2022-07-19 17:32:12,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 17:32:12,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-19 17:32:12,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:32:12,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-19 17:32:12,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2022-07-19 17:32:12,225 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 24 states, 21 states have (on average 2.142857142857143) internal successors, (45), 24 states have internal predecessors, (45), 12 states have call successors, (12), 1 states have call predecessors, (12), 9 states have return successors, (24), 8 states have call predecessors, (24), 12 states have call successors, (24) [2022-07-19 17:32:12,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:32:12,317 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2022-07-19 17:32:12,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-19 17:32:12,318 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 2.142857142857143) internal successors, (45), 24 states have internal predecessors, (45), 12 states have call successors, (12), 1 states have call predecessors, (12), 9 states have return successors, (24), 8 states have call predecessors, (24), 12 states have call successors, (24) Word has length 52 [2022-07-19 17:32:12,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:32:12,319 INFO L225 Difference]: With dead ends: 40 [2022-07-19 17:32:12,319 INFO L226 Difference]: Without dead ends: 36 [2022-07-19 17:32:12,320 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=306, Invalid=686, Unknown=0, NotChecked=0, Total=992 [2022-07-19 17:32:12,320 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 170 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 17:32:12,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 72 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 17:32:12,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-07-19 17:32:12,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-07-19 17:32:12,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 25 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 9 states have return successors, (10), 9 states have call predecessors, (10), 2 states have call successors, (10) [2022-07-19 17:32:12,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2022-07-19 17:32:12,324 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 52 [2022-07-19 17:32:12,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:32:12,325 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2022-07-19 17:32:12,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 2.142857142857143) internal successors, (45), 24 states have internal predecessors, (45), 12 states have call successors, (12), 1 states have call predecessors, (12), 9 states have return successors, (24), 8 states have call predecessors, (24), 12 states have call successors, (24) [2022-07-19 17:32:12,325 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2022-07-19 17:32:12,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-19 17:32:12,326 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:32:12,326 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:32:12,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-19 17:32:12,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:32:12,543 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:32:12,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:32:12,544 INFO L85 PathProgramCache]: Analyzing trace with hash -960511412, now seen corresponding path program 5 times [2022-07-19 17:32:12,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:32:12,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128327901] [2022-07-19 17:32:12,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:32:12,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:32:12,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:32:12,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:32:12,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:32:12,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:32:12,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:32:12,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:32:12,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:32:12,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:32:12,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:32:12,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:32:12,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:32:12,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:32:12,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:32:12,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:32:12,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:32:12,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:32:12,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:32:12,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:32:12,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:32:12,742 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-07-19 17:32:12,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:32:12,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128327901] [2022-07-19 17:32:12,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128327901] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 17:32:12,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499129041] [2022-07-19 17:32:12,743 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 17:32:12,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:32:12,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 17:32:12,750 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) [2022-07-19 17:32:12,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-19 17:32:12,825 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-07-19 17:32:12,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 17:32:12,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-19 17:32:12,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 17:32:13,090 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-07-19 17:32:13,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 17:32:15,106 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-07-19 17:32:15,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499129041] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 17:32:15,106 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 17:32:15,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21, 21] total 46 [2022-07-19 17:32:15,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264288247] [2022-07-19 17:32:15,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 17:32:15,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-19 17:32:15,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:32:15,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-19 17:32:15,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=1747, Unknown=0, NotChecked=0, Total=2070 [2022-07-19 17:32:15,108 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 46 states, 45 states have (on average 1.4) internal successors, (63), 30 states have internal predecessors, (63), 3 states have call successors, (4), 1 states have call predecessors, (4), 24 states have return successors, (25), 25 states have call predecessors, (25), 3 states have call successors, (25) [2022-07-19 17:32:15,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:32:15,531 INFO L93 Difference]: Finished difference Result 63 states and 70 transitions. [2022-07-19 17:32:15,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-19 17:32:15,532 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 1.4) internal successors, (63), 30 states have internal predecessors, (63), 3 states have call successors, (4), 1 states have call predecessors, (4), 24 states have return successors, (25), 25 states have call predecessors, (25), 3 states have call successors, (25) Word has length 58 [2022-07-19 17:32:15,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:32:15,532 INFO L225 Difference]: With dead ends: 63 [2022-07-19 17:32:15,533 INFO L226 Difference]: Without dead ends: 57 [2022-07-19 17:32:15,535 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1401 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=920, Invalid=4932, Unknown=0, NotChecked=0, Total=5852 [2022-07-19 17:32:15,535 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 21 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 17:32:15,535 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 94 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 17:32:15,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-07-19 17:32:15,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-07-19 17:32:15,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 39 states have internal predecessors, (39), 2 states have call successors, (2), 1 states have call predecessors, (2), 16 states have return successors, (17), 16 states have call predecessors, (17), 2 states have call successors, (17) [2022-07-19 17:32:15,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2022-07-19 17:32:15,540 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 58 [2022-07-19 17:32:15,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:32:15,541 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2022-07-19 17:32:15,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 1.4) internal successors, (63), 30 states have internal predecessors, (63), 3 states have call successors, (4), 1 states have call predecessors, (4), 24 states have return successors, (25), 25 states have call predecessors, (25), 3 states have call successors, (25) [2022-07-19 17:32:15,541 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2022-07-19 17:32:15,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-07-19 17:32:15,542 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:32:15,542 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:32:15,561 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-19 17:32:15,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:32:15,743 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:32:15,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:32:15,743 INFO L85 PathProgramCache]: Analyzing trace with hash 415287702, now seen corresponding path program 6 times [2022-07-19 17:32:15,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:32:15,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458769053] [2022-07-19 17:32:15,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:32:15,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:32:15,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 17:32:15,767 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 17:32:15,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 17:32:15,815 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 17:32:15,815 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 17:32:15,816 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-07-19 17:32:15,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-19 17:32:15,819 INFO L356 BasicCegarLoop]: Path program histogram: [6, 1] [2022-07-19 17:32:15,822 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-19 17:32:15,871 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.07 05:32:15 BoogieIcfgContainer [2022-07-19 17:32:15,871 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-19 17:32:15,872 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-19 17:32:15,872 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-19 17:32:15,872 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-19 17:32:15,872 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 05:32:07" (3/4) ... [2022-07-19 17:32:15,873 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-07-19 17:32:15,901 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2022-07-19 17:32:15,901 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-19 17:32:15,901 INFO L158 Benchmark]: Toolchain (without parser) took 8691.24ms. Allocated memory was 117.4MB in the beginning and 172.0MB in the end (delta: 54.5MB). Free memory was 83.2MB in the beginning and 137.8MB in the end (delta: -54.7MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-19 17:32:15,901 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 79.7MB. Free memory was 36.1MB in the beginning and 36.1MB in the end (delta: 44.2kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-19 17:32:15,902 INFO L158 Benchmark]: CACSL2BoogieTranslator took 179.54ms. Allocated memory is still 117.4MB. Free memory was 83.0MB in the beginning and 92.2MB in the end (delta: -9.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-19 17:32:15,902 INFO L158 Benchmark]: Boogie Procedure Inliner took 25.35ms. Allocated memory is still 117.4MB. Free memory was 92.2MB in the beginning and 91.0MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-19 17:32:15,902 INFO L158 Benchmark]: Boogie Preprocessor took 13.78ms. Allocated memory is still 117.4MB. Free memory was 91.0MB in the beginning and 89.8MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-19 17:32:15,902 INFO L158 Benchmark]: RCFGBuilder took 205.52ms. Allocated memory is still 117.4MB. Free memory was 89.8MB in the beginning and 81.7MB in the end (delta: 8.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-19 17:32:15,903 INFO L158 Benchmark]: TraceAbstraction took 8232.54ms. Allocated memory was 117.4MB in the beginning and 172.0MB in the end (delta: 54.5MB). Free memory was 81.0MB in the beginning and 141.0MB in the end (delta: -60.0MB). Peak memory consumption was 92.0MB. Max. memory is 16.1GB. [2022-07-19 17:32:15,903 INFO L158 Benchmark]: Witness Printer took 29.33ms. Allocated memory is still 172.0MB. Free memory was 141.0MB in the beginning and 137.8MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-19 17:32:15,904 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 79.7MB. Free memory was 36.1MB in the beginning and 36.1MB in the end (delta: 44.2kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 179.54ms. Allocated memory is still 117.4MB. Free memory was 83.0MB in the beginning and 92.2MB in the end (delta: -9.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 25.35ms. Allocated memory is still 117.4MB. Free memory was 92.2MB in the beginning and 91.0MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 13.78ms. Allocated memory is still 117.4MB. Free memory was 91.0MB in the beginning and 89.8MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 205.52ms. Allocated memory is still 117.4MB. Free memory was 89.8MB in the beginning and 81.7MB in the end (delta: 8.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 8232.54ms. Allocated memory was 117.4MB in the beginning and 172.0MB in the end (delta: 54.5MB). Free memory was 81.0MB in the beginning and 141.0MB in the end (delta: -60.0MB). Peak memory consumption was 92.0MB. Max. memory is 16.1GB. * Witness Printer took 29.33ms. Allocated memory is still 172.0MB. Free memory was 141.0MB in the beginning and 137.8MB in the end (delta: 3.1MB). 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: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L12] int input = 15; VAL [input=15] [L13] CALL, EXPR id(input) VAL [\old(x)=15] [L7] COND FALSE !(x==0) VAL [\old(x)=15, x=15] [L8] CALL, EXPR id(x-1) VAL [\old(x)=14] [L7] COND FALSE !(x==0) VAL [\old(x)=14, x=14] [L8] CALL, EXPR id(x-1) VAL [\old(x)=13] [L7] COND FALSE !(x==0) VAL [\old(x)=13, x=13] [L8] CALL, EXPR id(x-1) VAL [\old(x)=12] [L7] COND FALSE !(x==0) VAL [\old(x)=12, x=12] [L8] CALL, EXPR id(x-1) VAL [\old(x)=11] [L7] COND FALSE !(x==0) VAL [\old(x)=11, x=11] [L8] CALL, EXPR id(x-1) VAL [\old(x)=10] [L7] COND FALSE !(x==0) VAL [\old(x)=10, x=10] [L8] CALL, EXPR id(x-1) VAL [\old(x)=9] [L7] COND FALSE !(x==0) VAL [\old(x)=9, x=9] [L8] CALL, EXPR id(x-1) VAL [\old(x)=8] [L7] COND FALSE !(x==0) VAL [\old(x)=8, x=8] [L8] CALL, EXPR id(x-1) VAL [\old(x)=7] [L7] COND FALSE !(x==0) VAL [\old(x)=7, x=7] [L8] CALL, EXPR id(x-1) VAL [\old(x)=6] [L7] COND FALSE !(x==0) VAL [\old(x)=6, x=6] [L8] CALL, EXPR id(x-1) VAL [\old(x)=5] [L7] COND FALSE !(x==0) VAL [\old(x)=5, x=5] [L8] CALL, EXPR id(x-1) VAL [\old(x)=4] [L7] COND FALSE !(x==0) VAL [\old(x)=4, x=4] [L8] CALL, EXPR id(x-1) VAL [\old(x)=3] [L7] COND FALSE !(x==0) VAL [\old(x)=3, x=3] [L8] CALL, EXPR id(x-1) VAL [\old(x)=2] [L7] COND FALSE !(x==0) VAL [\old(x)=2, x=2] [L8] CALL, EXPR id(x-1) VAL [\old(x)=1] [L7] COND FALSE !(x==0) VAL [\old(x)=1, x=1] [L8] CALL, EXPR id(x-1) VAL [\old(x)=0] [L7] COND TRUE x==0 [L7] return 0; VAL [\old(x)=0, \result=0, x=0] [L8] RET, EXPR id(x-1) VAL [\old(x)=1, id(x-1)=0, x=1] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=2, id(x-1)=1, x=2] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=3, id(x-1)=2, x=3] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=4, id(x-1)=3, x=4] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=5, id(x-1)=4, x=5] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=6, id(x-1)=5, x=6] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=7, id(x-1)=6, x=7] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=8, id(x-1)=7, x=8] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=9, id(x-1)=8, x=9] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=10, id(x-1)=9, x=10] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=11, id(x-1)=10, x=11] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=12, id(x-1)=11, x=12] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=13, id(x-1)=12, x=13] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=14, id(x-1)=13, x=14] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=15, id(x-1)=14, x=15] [L8] return id(x-1) + 1; [L13] RET, EXPR id(input) VAL [id(input)=15, input=15] [L13] int result = id(input); [L14] COND TRUE result == 15 VAL [input=15, result=15] [L15] reach_error() VAL [input=15, result=15] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 16 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 8.1s, OverallIterations: 7, TraceHistogramMax: 16, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 330 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 273 mSDsluCounter, 361 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 302 mSDsCounter, 129 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 385 IncrementalHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 129 mSolverCounterUnsat, 59 mSDtfsCounter, 385 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 501 GetRequests, 325 SyntacticMatches, 1 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1998 ImplicationChecksByTransitivity, 1.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=57occurred in iteration=6, InterpolantAutomatonStates: 84, 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, 6 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 5.5s InterpolantComputationTime, 462 NumberOfCodeBlocks, 462 NumberOfCodeBlocksAsserted, 25 NumberOfCheckSat, 522 ConstructedInterpolants, 0 QuantifiedInterpolants, 1289 SizeOfPredicates, 13 NumberOfNonLiveVariables, 529 ConjunctsInSsa, 62 ConjunctsInUnsatCore, 16 InterpolantComputations, 1 PerfectInterpolantSequences, 549/1206 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! [2022-07-19 17:32:15,931 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