./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/fibo_2calls_2-2.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/fibo_2calls_2-2.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 6597d5a31aa324ba443314d2c363b302cd71d697c12811ade53ae3225a095206 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 17:29:44,104 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 17:29:44,106 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 17:29:44,139 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 17:29:44,139 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 17:29:44,140 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 17:29:44,142 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 17:29:44,143 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 17:29:44,145 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 17:29:44,148 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 17:29:44,148 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 17:29:44,150 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 17:29:44,150 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 17:29:44,151 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 17:29:44,152 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 17:29:44,155 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 17:29:44,155 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 17:29:44,156 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 17:29:44,157 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 17:29:44,161 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 17:29:44,162 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 17:29:44,163 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 17:29:44,164 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 17:29:44,164 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 17:29:44,165 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 17:29:44,170 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 17:29:44,170 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 17:29:44,171 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 17:29:44,171 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 17:29:44,172 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 17:29:44,173 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 17:29:44,173 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 17:29:44,174 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 17:29:44,174 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 17:29:44,175 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 17:29:44,175 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 17:29:44,176 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 17:29:44,177 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 17:29:44,177 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 17:29:44,177 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 17:29:44,178 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 17:29:44,179 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 17:29:44,180 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 17:29:44,202 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 17:29:44,203 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 17:29:44,203 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 17:29:44,203 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 17:29:44,204 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 17:29:44,204 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 17:29:44,204 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 17:29:44,204 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 17:29:44,205 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 17:29:44,205 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 17:29:44,205 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 17:29:44,206 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 17:29:44,206 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 17:29:44,206 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 17:29:44,206 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 17:29:44,206 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 17:29:44,206 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 17:29:44,206 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 17:29:44,207 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 17:29:44,207 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 17:29:44,207 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 17:29:44,207 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 17:29:44,207 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 17:29:44,207 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 17:29:44,208 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 17:29:44,208 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 17:29:44,213 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 17:29:44,214 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 17:29:44,214 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 17:29:44,214 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 17:29:44,214 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 17:29:44,214 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 17:29:44,214 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 17:29:44,214 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6597d5a31aa324ba443314d2c363b302cd71d697c12811ade53ae3225a095206 [2022-07-19 17:29:44,397 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 17:29:44,417 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 17:29:44,419 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 17:29:44,419 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 17:29:44,420 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 17:29:44,421 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/fibo_2calls_2-2.c [2022-07-19 17:29:44,475 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/82600ad34/132cd99a871c40a4aeb287e2b65c8088/FLAG52cab3ab2 [2022-07-19 17:29:44,818 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 17:29:44,819 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_2calls_2-2.c [2022-07-19 17:29:44,823 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/82600ad34/132cd99a871c40a4aeb287e2b65c8088/FLAG52cab3ab2 [2022-07-19 17:29:44,835 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/82600ad34/132cd99a871c40a4aeb287e2b65c8088 [2022-07-19 17:29:44,837 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 17:29:44,838 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 17:29:44,839 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 17:29:44,839 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 17:29:44,841 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 17:29:44,841 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 05:29:44" (1/1) ... [2022-07-19 17:29:44,842 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76f6a28e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:29:44, skipping insertion in model container [2022-07-19 17:29:44,842 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 05:29:44" (1/1) ... [2022-07-19 17:29:44,869 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 17:29:44,881 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 17:29:45,010 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_2calls_2-2.c[946,959] [2022-07-19 17:29:45,012 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 17:29:45,017 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 17:29:45,030 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_2calls_2-2.c[946,959] [2022-07-19 17:29:45,031 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 17:29:45,040 INFO L208 MainTranslator]: Completed translation [2022-07-19 17:29:45,041 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:29:45 WrapperNode [2022-07-19 17:29:45,041 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 17:29:45,042 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 17:29:45,042 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 17:29:45,042 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 17:29:45,047 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:29:45" (1/1) ... [2022-07-19 17:29:45,051 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:29:45" (1/1) ... [2022-07-19 17:29:45,062 INFO L137 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 21 [2022-07-19 17:29:45,062 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 17:29:45,063 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 17:29:45,063 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 17:29:45,063 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 17:29:45,068 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:29:45" (1/1) ... [2022-07-19 17:29:45,068 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:29:45" (1/1) ... [2022-07-19 17:29:45,069 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:29:45" (1/1) ... [2022-07-19 17:29:45,070 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:29:45" (1/1) ... [2022-07-19 17:29:45,071 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:29:45" (1/1) ... [2022-07-19 17:29:45,072 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:29:45" (1/1) ... [2022-07-19 17:29:45,073 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:29:45" (1/1) ... [2022-07-19 17:29:45,073 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 17:29:45,074 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 17:29:45,074 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 17:29:45,074 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 17:29:45,075 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:29:45" (1/1) ... [2022-07-19 17:29:45,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 17:29:45,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 17:29:45,099 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 17:29:45,113 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 17:29:45,122 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 17:29:45,123 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 17:29:45,123 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2022-07-19 17:29:45,123 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2022-07-19 17:29:45,123 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2022-07-19 17:29:45,123 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2022-07-19 17:29:45,123 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 17:29:45,124 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 17:29:45,158 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 17:29:45,159 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 17:29:45,231 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 17:29:45,234 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 17:29:45,235 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-07-19 17:29:45,236 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 05:29:45 BoogieIcfgContainer [2022-07-19 17:29:45,236 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 17:29:45,237 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 17:29:45,237 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 17:29:45,239 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 17:29:45,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 05:29:44" (1/3) ... [2022-07-19 17:29:45,240 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41f7bd47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 05:29:45, skipping insertion in model container [2022-07-19 17:29:45,240 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:29:45" (2/3) ... [2022-07-19 17:29:45,240 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41f7bd47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 05:29:45, skipping insertion in model container [2022-07-19 17:29:45,240 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 05:29:45" (3/3) ... [2022-07-19 17:29:45,241 INFO L111 eAbstractionObserver]: Analyzing ICFG fibo_2calls_2-2.c [2022-07-19 17:29:45,250 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 17:29:45,250 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 17:29:45,278 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 17:29:45,282 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@35d92cbe, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2916676a [2022-07-19 17:29:45,282 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 17:29:45,285 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-19 17:29:45,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-19 17:29:45,290 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:29:45,290 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:29:45,290 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:29:45,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:29:45,294 INFO L85 PathProgramCache]: Analyzing trace with hash 1123300790, now seen corresponding path program 1 times [2022-07-19 17:29:45,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:29:45,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998946989] [2022-07-19 17:29:45,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:29:45,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:29:45,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:29:45,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:29:45,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:29:45,408 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 17:29:45,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:29:45,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998946989] [2022-07-19 17:29:45,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998946989] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 17:29:45,409 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 17:29:45,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 17:29:45,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573354409] [2022-07-19 17:29:45,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 17:29:45,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 17:29:45,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:29:45,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 17:29:45,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 17:29:45,437 INFO L87 Difference]: Start difference. First operand has 29 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) 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 17:29:45,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:29:45,515 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2022-07-19 17:29:45,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 17:29:45,516 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 17:29:45,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:29:45,521 INFO L225 Difference]: With dead ends: 39 [2022-07-19 17:29:45,521 INFO L226 Difference]: Without dead ends: 27 [2022-07-19 17:29:45,523 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 17:29:45,525 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 15 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 17:29:45,526 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 82 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 17:29:45,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-07-19 17:29:45,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-07-19 17:29:45,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-07-19 17:29:45,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2022-07-19 17:29:45,579 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 10 [2022-07-19 17:29:45,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:29:45,580 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2022-07-19 17:29:45,580 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 17:29:45,580 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2022-07-19 17:29:45,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-19 17:29:45,581 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:29:45,581 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:29:45,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 17:29:45,582 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:29:45,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:29:45,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1177745932, now seen corresponding path program 1 times [2022-07-19 17:29:45,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:29:45,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467962685] [2022-07-19 17:29:45,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:29:45,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:29:45,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:29:45,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:29:45,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:29:45,631 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 17:29:45,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:29:45,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467962685] [2022-07-19 17:29:45,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467962685] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 17:29:45,632 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 17:29:45,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 17:29:45,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301215013] [2022-07-19 17:29:45,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 17:29:45,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 17:29:45,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:29:45,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 17:29:45,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 17:29:45,634 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-19 17:29:45,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:29:45,669 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2022-07-19 17:29:45,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 17:29:45,670 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-07-19 17:29:45,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:29:45,670 INFO L225 Difference]: With dead ends: 33 [2022-07-19 17:29:45,671 INFO L226 Difference]: Without dead ends: 29 [2022-07-19 17:29:45,671 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 17:29:45,672 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 10 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 17:29:45,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 70 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 17:29:45,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-07-19 17:29:45,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2022-07-19 17:29:45,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-07-19 17:29:45,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2022-07-19 17:29:45,678 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 11 [2022-07-19 17:29:45,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:29:45,679 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2022-07-19 17:29:45,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-19 17:29:45,679 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2022-07-19 17:29:45,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-19 17:29:45,680 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:29:45,680 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:29:45,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 17:29:45,680 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:29:45,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:29:45,681 INFO L85 PathProgramCache]: Analyzing trace with hash 2110588723, now seen corresponding path program 1 times [2022-07-19 17:29:45,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:29:45,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192706300] [2022-07-19 17:29:45,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:29:45,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:29:45,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:29:45,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:29:45,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:29:45,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:29:45,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:29:45,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-19 17:29:45,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:29:45,756 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 17:29:45,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:29:45,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192706300] [2022-07-19 17:29:45,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192706300] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 17:29:45,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434422962] [2022-07-19 17:29:45,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:29:45,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:29:45,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 17:29:45,759 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 17:29:45,795 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 17:29:45,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:29:45,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-19 17:29:45,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 17:29:45,879 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 17:29:45,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 17:29:45,997 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 17:29:45,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434422962] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 17:29:45,998 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 17:29:45,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-07-19 17:29:45,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422088006] [2022-07-19 17:29:45,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 17:29:45,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-19 17:29:45,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:29:45,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-19 17:29:45,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-07-19 17:29:46,000 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 13 states, 10 states have (on average 3.1) internal successors, (31), 13 states have internal predecessors, (31), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-19 17:29:46,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:29:46,107 INFO L93 Difference]: Finished difference Result 55 states and 75 transitions. [2022-07-19 17:29:46,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-19 17:29:46,108 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 3.1) internal successors, (31), 13 states have internal predecessors, (31), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 7 states have call successors, (7) Word has length 23 [2022-07-19 17:29:46,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:29:46,109 INFO L225 Difference]: With dead ends: 55 [2022-07-19 17:29:46,109 INFO L226 Difference]: Without dead ends: 31 [2022-07-19 17:29:46,110 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-07-19 17:29:46,111 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 34 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 17:29:46,111 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 97 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 17:29:46,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-07-19 17:29:46,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2022-07-19 17:29:46,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 21 states have internal predecessors, (23), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-07-19 17:29:46,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2022-07-19 17:29:46,116 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 23 [2022-07-19 17:29:46,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:29:46,116 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2022-07-19 17:29:46,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 3.1) internal successors, (31), 13 states have internal predecessors, (31), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-19 17:29:46,117 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2022-07-19 17:29:46,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-19 17:29:46,118 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:29:46,118 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:29:46,136 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 17:29:46,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:29:46,334 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:29:46,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:29:46,334 INFO L85 PathProgramCache]: Analyzing trace with hash 1277869167, now seen corresponding path program 1 times [2022-07-19 17:29:46,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:29:46,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371072037] [2022-07-19 17:29:46,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:29:46,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:29:46,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:29:46,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:29:46,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:29:46,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:29:46,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:29:46,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-19 17:29:46,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:29:46,494 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 17:29:46,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:29:46,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371072037] [2022-07-19 17:29:46,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371072037] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 17:29:46,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481142653] [2022-07-19 17:29:46,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:29:46,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:29:46,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 17:29:46,497 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 17:29:46,523 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 17:29:46,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:29:46,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-19 17:29:46,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 17:29:46,639 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 17:29:46,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 17:29:46,743 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 17:29:46,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481142653] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 17:29:46,744 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 17:29:46,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 10 [2022-07-19 17:29:46,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209556644] [2022-07-19 17:29:46,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 17:29:46,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 17:29:46,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:29:46,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 17:29:46,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-07-19 17:29:46,750 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-19 17:29:46,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:29:46,789 INFO L93 Difference]: Finished difference Result 43 states and 56 transitions. [2022-07-19 17:29:46,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 17:29:46,790 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 24 [2022-07-19 17:29:46,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:29:46,793 INFO L225 Difference]: With dead ends: 43 [2022-07-19 17:29:46,793 INFO L226 Difference]: Without dead ends: 39 [2022-07-19 17:29:46,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 48 SyntacticMatches, 5 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-07-19 17:29:46,798 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 0 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 17:29:46,799 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 276 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 17:29:46,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-07-19 17:29:46,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 34. [2022-07-19 17:29:46,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 24 states have internal predecessors, (26), 6 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) [2022-07-19 17:29:46,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions. [2022-07-19 17:29:46,813 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 24 [2022-07-19 17:29:46,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:29:46,813 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions. [2022-07-19 17:29:46,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-19 17:29:46,813 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2022-07-19 17:29:46,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-19 17:29:46,814 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:29:46,814 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:29:46,832 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 17:29:47,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-07-19 17:29:47,033 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:29:47,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:29:47,035 INFO L85 PathProgramCache]: Analyzing trace with hash 988182601, now seen corresponding path program 1 times [2022-07-19 17:29:47,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:29:47,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479466544] [2022-07-19 17:29:47,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:29:47,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:29:47,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:29:47,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:29:47,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:29:47,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:29:47,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:29:47,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-19 17:29:47,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:29:47,091 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 17:29:47,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:29:47,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479466544] [2022-07-19 17:29:47,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479466544] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 17:29:47,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649358781] [2022-07-19 17:29:47,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:29:47,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:29:47,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 17:29:47,116 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 17:29:47,117 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 17:29:47,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:29:47,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-19 17:29:47,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 17:29:47,180 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 17:29:47,181 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 17:29:47,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649358781] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 17:29:47,181 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 17:29:47,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 12 [2022-07-19 17:29:47,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809619469] [2022-07-19 17:29:47,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 17:29:47,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 17:29:47,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:29:47,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 17:29:47,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-07-19 17:29:47,183 INFO L87 Difference]: Start difference. First operand 34 states and 45 transitions. Second operand has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-19 17:29:47,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:29:47,243 INFO L93 Difference]: Finished difference Result 41 states and 53 transitions. [2022-07-19 17:29:47,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 17:29:47,244 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2022-07-19 17:29:47,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:29:47,244 INFO L225 Difference]: With dead ends: 41 [2022-07-19 17:29:47,244 INFO L226 Difference]: Without dead ends: 37 [2022-07-19 17:29:47,245 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-07-19 17:29:47,245 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 17:29:47,246 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 79 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 17:29:47,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-07-19 17:29:47,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2022-07-19 17:29:47,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 24 states have internal predecessors, (26), 6 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) [2022-07-19 17:29:47,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions. [2022-07-19 17:29:47,250 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 25 [2022-07-19 17:29:47,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:29:47,250 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions. [2022-07-19 17:29:47,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-19 17:29:47,250 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2022-07-19 17:29:47,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-19 17:29:47,251 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:29:47,251 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:29:47,267 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 17:29:47,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:29:47,455 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:29:47,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:29:47,456 INFO L85 PathProgramCache]: Analyzing trace with hash -2061621832, now seen corresponding path program 1 times [2022-07-19 17:29:47,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:29:47,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369898891] [2022-07-19 17:29:47,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:29:47,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:29:47,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:29:47,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:29:47,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:29:47,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:29:47,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:29:47,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:29:47,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:29:47,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-19 17:29:47,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:29:47,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-19 17:29:47,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:29:47,528 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-19 17:29:47,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:29:47,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369898891] [2022-07-19 17:29:47,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369898891] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 17:29:47,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16453279] [2022-07-19 17:29:47,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:29:47,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:29:47,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 17:29:47,530 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 17:29:47,531 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 17:29:47,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:29:47,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-19 17:29:47,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 17:29:47,621 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-19 17:29:47,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 17:29:47,771 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-19 17:29:47,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16453279] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 17:29:47,772 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 17:29:47,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 16 [2022-07-19 17:29:47,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369863122] [2022-07-19 17:29:47,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 17:29:47,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-19 17:29:47,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:29:47,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-19 17:29:47,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2022-07-19 17:29:47,774 INFO L87 Difference]: Start difference. First operand 34 states and 45 transitions. Second operand has 16 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 16 states have internal predecessors, (43), 9 states have call successors, (11), 1 states have call predecessors, (11), 5 states have return successors, (11), 3 states have call predecessors, (11), 9 states have call successors, (11) [2022-07-19 17:29:47,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:29:47,893 INFO L93 Difference]: Finished difference Result 66 states and 98 transitions. [2022-07-19 17:29:47,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 17:29:47,893 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 16 states have internal predecessors, (43), 9 states have call successors, (11), 1 states have call predecessors, (11), 5 states have return successors, (11), 3 states have call predecessors, (11), 9 states have call successors, (11) Word has length 36 [2022-07-19 17:29:47,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:29:47,894 INFO L225 Difference]: With dead ends: 66 [2022-07-19 17:29:47,894 INFO L226 Difference]: Without dead ends: 0 [2022-07-19 17:29:47,895 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2022-07-19 17:29:47,895 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 38 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 17:29:47,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 110 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 17:29:47,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-07-19 17:29:47,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-07-19 17:29:47,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 17:29:47,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-07-19 17:29:47,896 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 36 [2022-07-19 17:29:47,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:29:47,897 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-07-19 17:29:47,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 16 states have internal predecessors, (43), 9 states have call successors, (11), 1 states have call predecessors, (11), 5 states have return successors, (11), 3 states have call predecessors, (11), 9 states have call successors, (11) [2022-07-19 17:29:47,897 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-07-19 17:29:47,897 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-07-19 17:29:47,899 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-07-19 17:29:47,917 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 17:29:48,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:29:48,117 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-07-19 17:29:48,161 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-07-19 17:29:48,162 INFO L899 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2022-07-19 17:29:48,162 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2022-07-19 17:29:48,162 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-07-19 17:29:48,162 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 41) no Hoare annotation was computed. [2022-07-19 17:29:48,162 INFO L895 garLoopResultBuilder]: At program point L43(lines 37 44) the Hoare annotation is: (= 2 |ULTIMATE.start_main_~x~0#1|) [2022-07-19 17:29:48,162 INFO L899 garLoopResultBuilder]: For program point L41(line 41) no Hoare annotation was computed. [2022-07-19 17:29:48,162 INFO L899 garLoopResultBuilder]: For program point L40(lines 40 42) no Hoare annotation was computed. [2022-07-19 17:29:48,162 INFO L895 garLoopResultBuilder]: At program point L39(line 39) the Hoare annotation is: (= 2 |ULTIMATE.start_main_~x~0#1|) [2022-07-19 17:29:48,162 INFO L899 garLoopResultBuilder]: For program point L39-1(line 39) no Hoare annotation was computed. [2022-07-19 17:29:48,162 INFO L899 garLoopResultBuilder]: For program point L40-2(lines 40 42) no Hoare annotation was computed. [2022-07-19 17:29:48,162 INFO L902 garLoopResultBuilder]: At program point fibo2ENTRY(lines 19 27) the Hoare annotation is: true [2022-07-19 17:29:48,162 INFO L895 garLoopResultBuilder]: At program point L25(line 25) the Hoare annotation is: (and (= fibo2_~n |fibo2_#in~n|) (< 1 fibo2_~n)) [2022-07-19 17:29:48,163 INFO L899 garLoopResultBuilder]: For program point L25-1(line 25) no Hoare annotation was computed. [2022-07-19 17:29:48,163 INFO L895 garLoopResultBuilder]: At program point L25-2(line 25) the Hoare annotation is: (and (= fibo2_~n |fibo2_#in~n|) (< 1 fibo2_~n)) [2022-07-19 17:29:48,163 INFO L899 garLoopResultBuilder]: For program point L22(lines 22 26) no Hoare annotation was computed. [2022-07-19 17:29:48,163 INFO L899 garLoopResultBuilder]: For program point L25-3(line 25) no Hoare annotation was computed. [2022-07-19 17:29:48,163 INFO L899 garLoopResultBuilder]: For program point L20(lines 20 26) no Hoare annotation was computed. [2022-07-19 17:29:48,163 INFO L899 garLoopResultBuilder]: For program point fibo2FINAL(lines 19 27) no Hoare annotation was computed. [2022-07-19 17:29:48,163 INFO L899 garLoopResultBuilder]: For program point fibo2EXIT(lines 19 27) no Hoare annotation was computed. [2022-07-19 17:29:48,163 INFO L902 garLoopResultBuilder]: At program point fibo1ENTRY(lines 9 17) the Hoare annotation is: true [2022-07-19 17:29:48,163 INFO L895 garLoopResultBuilder]: At program point L15(line 15) the Hoare annotation is: (and (< 1 fibo1_~n) (= fibo1_~n |fibo1_#in~n|)) [2022-07-19 17:29:48,163 INFO L899 garLoopResultBuilder]: For program point L15-1(line 15) no Hoare annotation was computed. [2022-07-19 17:29:48,164 INFO L895 garLoopResultBuilder]: At program point L15-2(line 15) the Hoare annotation is: (let ((.cse0 (= fibo1_~n |fibo1_#in~n|))) (or (and .cse0 (< 2 |fibo1_#in~n|)) (and (< 1 fibo1_~n) (<= 1 |fibo1_#t~ret4|) .cse0 (<= |fibo1_#t~ret4| 1)))) [2022-07-19 17:29:48,164 INFO L899 garLoopResultBuilder]: For program point L12(lines 12 16) no Hoare annotation was computed. [2022-07-19 17:29:48,164 INFO L899 garLoopResultBuilder]: For program point L15-3(line 15) no Hoare annotation was computed. [2022-07-19 17:29:48,164 INFO L899 garLoopResultBuilder]: For program point fibo1FINAL(lines 9 17) no Hoare annotation was computed. [2022-07-19 17:29:48,164 INFO L899 garLoopResultBuilder]: For program point L10(lines 10 16) no Hoare annotation was computed. [2022-07-19 17:29:48,164 INFO L899 garLoopResultBuilder]: For program point fibo1EXIT(lines 9 17) no Hoare annotation was computed. [2022-07-19 17:29:48,166 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-19 17:29:48,168 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-19 17:29:48,177 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.07 05:29:48 BoogieIcfgContainer [2022-07-19 17:29:48,177 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-19 17:29:48,178 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-19 17:29:48,178 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-19 17:29:48,178 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-19 17:29:48,179 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 05:29:45" (3/4) ... [2022-07-19 17:29:48,181 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-07-19 17:29:48,185 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo2 [2022-07-19 17:29:48,185 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo1 [2022-07-19 17:29:48,188 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2022-07-19 17:29:48,188 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2022-07-19 17:29:48,188 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2022-07-19 17:29:48,188 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-07-19 17:29:48,215 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2022-07-19 17:29:48,215 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-19 17:29:48,216 INFO L158 Benchmark]: Toolchain (without parser) took 3377.91ms. Allocated memory was 100.7MB in the beginning and 121.6MB in the end (delta: 21.0MB). Free memory was 78.6MB in the beginning and 56.5MB in the end (delta: 22.1MB). Peak memory consumption was 41.6MB. Max. memory is 16.1GB. [2022-07-19 17:29:48,216 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 83.9MB. Free memory was 59.4MB in the beginning and 59.3MB in the end (delta: 36.8kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-19 17:29:48,216 INFO L158 Benchmark]: CACSL2BoogieTranslator took 202.44ms. Allocated memory is still 100.7MB. Free memory was 78.3MB in the beginning and 69.7MB in the end (delta: 8.6MB). Peak memory consumption was 8.5MB. Max. memory is 16.1GB. [2022-07-19 17:29:48,216 INFO L158 Benchmark]: Boogie Procedure Inliner took 20.34ms. Allocated memory is still 100.7MB. Free memory was 69.7MB in the beginning and 68.4MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-19 17:29:48,217 INFO L158 Benchmark]: Boogie Preprocessor took 10.99ms. Allocated memory is still 100.7MB. Free memory was 68.4MB in the beginning and 67.3MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-19 17:29:48,217 INFO L158 Benchmark]: RCFGBuilder took 162.07ms. Allocated memory is still 100.7MB. Free memory was 67.3MB in the beginning and 57.9MB in the end (delta: 9.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-07-19 17:29:48,217 INFO L158 Benchmark]: TraceAbstraction took 2940.54ms. Allocated memory was 100.7MB in the beginning and 121.6MB in the end (delta: 21.0MB). Free memory was 57.4MB in the beginning and 58.6MB in the end (delta: -1.1MB). Peak memory consumption was 18.5MB. Max. memory is 16.1GB. [2022-07-19 17:29:48,218 INFO L158 Benchmark]: Witness Printer took 37.40ms. Allocated memory is still 121.6MB. Free memory was 58.6MB in the beginning and 56.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-19 17:29:48,219 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 83.9MB. Free memory was 59.4MB in the beginning and 59.3MB in the end (delta: 36.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 202.44ms. Allocated memory is still 100.7MB. Free memory was 78.3MB in the beginning and 69.7MB in the end (delta: 8.6MB). Peak memory consumption was 8.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 20.34ms. Allocated memory is still 100.7MB. Free memory was 69.7MB in the beginning and 68.4MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 10.99ms. Allocated memory is still 100.7MB. Free memory was 68.4MB in the beginning and 67.3MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 162.07ms. Allocated memory is still 100.7MB. Free memory was 67.3MB in the beginning and 57.9MB in the end (delta: 9.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 2940.54ms. Allocated memory was 100.7MB in the beginning and 121.6MB in the end (delta: 21.0MB). Free memory was 57.4MB in the beginning and 58.6MB in the end (delta: -1.1MB). Peak memory consumption was 18.5MB. Max. memory is 16.1GB. * Witness Printer took 37.40ms. Allocated memory is still 121.6MB. Free memory was 58.6MB in the beginning and 56.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 41]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 2.9s, OverallIterations: 6, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 132 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 114 mSDsluCounter, 714 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 565 mSDsCounter, 38 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 575 IncrementalHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 38 mSolverCounterUnsat, 149 mSDtfsCounter, 575 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 273 GetRequests, 204 SyntacticMatches, 8 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=34occurred in iteration=4, InterpolantAutomatonStates: 45, 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, 12 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 47 PreInvPairs, 57 NumberOfFragments, 50 HoareAnnotationTreeSize, 47 FomulaSimplifications, 91 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 9 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 237 NumberOfCodeBlocks, 237 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 307 ConstructedInterpolants, 0 QuantifiedInterpolants, 776 SizeOfPredicates, 7 NumberOfNonLiveVariables, 331 ConjunctsInSsa, 34 ConjunctsInUnsatCore, 13 InterpolantComputations, 3 PerfectInterpolantSequences, 50/82 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 37]: Loop Invariant Derived loop invariant: 2 == x RESULT: Ultimate proved your program to be correct! [2022-07-19 17:29:48,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE