./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 5fbdf5bf 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 557a695617b4e9b94623290cf2a16a969b4f7de0 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.seqcomp-5fbdf5b [2021-08-29 16:20:43,119 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-29 16:20:43,121 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-29 16:20:43,150 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-29 16:20:43,151 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-29 16:20:43,153 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-29 16:20:43,154 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-29 16:20:43,158 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-29 16:20:43,160 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-29 16:20:43,163 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-29 16:20:43,176 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-29 16:20:43,179 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-29 16:20:43,179 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-29 16:20:43,181 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-29 16:20:43,182 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-29 16:20:43,184 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-29 16:20:43,194 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-29 16:20:43,195 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-29 16:20:43,196 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-29 16:20:43,201 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-29 16:20:43,201 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-29 16:20:43,202 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-29 16:20:43,204 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-29 16:20:43,204 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-29 16:20:43,208 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-29 16:20:43,209 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-29 16:20:43,209 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-29 16:20:43,210 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-29 16:20:43,210 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-29 16:20:43,211 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-29 16:20:43,211 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-29 16:20:43,211 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-29 16:20:43,213 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-29 16:20:43,214 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-29 16:20:43,214 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-29 16:20:43,215 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-29 16:20:43,215 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-29 16:20:43,215 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-29 16:20:43,215 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-29 16:20:43,216 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-29 16:20:43,217 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-29 16:20:43,218 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-29 16:20:43,246 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-29 16:20:43,246 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-29 16:20:43,247 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-29 16:20:43,247 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-29 16:20:43,249 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-29 16:20:43,249 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-29 16:20:43,249 INFO L138 SettingsManager]: * Use SBE=true [2021-08-29 16:20:43,249 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-29 16:20:43,249 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-29 16:20:43,250 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-29 16:20:43,250 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-29 16:20:43,250 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-29 16:20:43,250 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-29 16:20:43,251 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-29 16:20:43,251 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-29 16:20:43,251 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-29 16:20:43,251 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-29 16:20:43,251 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-29 16:20:43,251 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-29 16:20:43,251 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-29 16:20:43,252 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-29 16:20:43,252 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-29 16:20:43,252 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 16:20:43,252 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-29 16:20:43,252 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-29 16:20:43,252 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-29 16:20:43,252 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-29 16:20:43,253 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-29 16:20:43,253 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-29 16:20:43,253 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-29 16:20:43,253 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 557a695617b4e9b94623290cf2a16a969b4f7de0 [2021-08-29 16:20:43,518 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-29 16:20:43,537 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-29 16:20:43,539 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-29 16:20:43,540 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-29 16:20:43,540 INFO L275 PluginConnector]: CDTParser initialized [2021-08-29 16:20:43,541 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/fibo_2calls_2-2.c [2021-08-29 16:20:43,598 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/80eb2b469/7aa072fccb6f40f0b9137d0a5e11a732/FLAGeb4c051c9 [2021-08-29 16:20:43,921 INFO L306 CDTParser]: Found 1 translation units. [2021-08-29 16:20:43,922 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_2calls_2-2.c [2021-08-29 16:20:43,934 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/80eb2b469/7aa072fccb6f40f0b9137d0a5e11a732/FLAGeb4c051c9 [2021-08-29 16:20:43,947 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/80eb2b469/7aa072fccb6f40f0b9137d0a5e11a732 [2021-08-29 16:20:43,948 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-29 16:20:43,950 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-29 16:20:43,952 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-29 16:20:43,952 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-29 16:20:43,954 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-29 16:20:43,955 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 04:20:43" (1/1) ... [2021-08-29 16:20:43,955 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@bac7f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:20:43, skipping insertion in model container [2021-08-29 16:20:43,955 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 04:20:43" (1/1) ... [2021-08-29 16:20:43,959 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-29 16:20:43,967 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-29 16:20:44,079 WARN L228 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] [2021-08-29 16:20:44,081 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 16:20:44,086 INFO L203 MainTranslator]: Completed pre-run [2021-08-29 16:20:44,097 WARN L228 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] [2021-08-29 16:20:44,099 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 16:20:44,108 INFO L208 MainTranslator]: Completed translation [2021-08-29 16:20:44,108 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:20:44 WrapperNode [2021-08-29 16:20:44,109 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-29 16:20:44,111 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-29 16:20:44,111 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-29 16:20:44,111 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-29 16:20:44,120 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:20:44" (1/1) ... [2021-08-29 16:20:44,127 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:20:44" (1/1) ... [2021-08-29 16:20:44,147 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-29 16:20:44,150 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-29 16:20:44,150 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-29 16:20:44,150 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-29 16:20:44,155 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:20:44" (1/1) ... [2021-08-29 16:20:44,155 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:20:44" (1/1) ... [2021-08-29 16:20:44,156 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:20:44" (1/1) ... [2021-08-29 16:20:44,156 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:20:44" (1/1) ... [2021-08-29 16:20:44,164 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:20:44" (1/1) ... [2021-08-29 16:20:44,166 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:20:44" (1/1) ... [2021-08-29 16:20:44,167 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:20:44" (1/1) ... [2021-08-29 16:20:44,171 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-29 16:20:44,173 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-29 16:20:44,173 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-29 16:20:44,173 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-29 16:20:44,174 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:20:44" (1/1) ... [2021-08-29 16:20:44,178 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 16:20:44,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 16:20:44,198 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) [2021-08-29 16:20:44,237 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 [2021-08-29 16:20:44,247 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-29 16:20:44,248 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2021-08-29 16:20:44,248 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2021-08-29 16:20:44,248 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-29 16:20:44,249 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2021-08-29 16:20:44,249 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2021-08-29 16:20:44,249 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-29 16:20:44,249 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-29 16:20:44,342 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-29 16:20:44,343 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-08-29 16:20:44,344 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 04:20:44 BoogieIcfgContainer [2021-08-29 16:20:44,344 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-29 16:20:44,345 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-29 16:20:44,345 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-29 16:20:44,347 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-29 16:20:44,347 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 04:20:43" (1/3) ... [2021-08-29 16:20:44,347 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@94b1ba4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 04:20:44, skipping insertion in model container [2021-08-29 16:20:44,348 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:20:44" (2/3) ... [2021-08-29 16:20:44,348 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@94b1ba4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 04:20:44, skipping insertion in model container [2021-08-29 16:20:44,348 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 04:20:44" (3/3) ... [2021-08-29 16:20:44,349 INFO L111 eAbstractionObserver]: Analyzing ICFG fibo_2calls_2-2.c [2021-08-29 16:20:44,352 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-29 16:20:44,352 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-29 16:20:44,378 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-29 16:20:44,382 INFO L339 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, mConcurrency=FINITE_AUTOMATA, 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, mLoopAccelerationTechnique=FAST_UPR [2021-08-29 16:20:44,382 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-29 16:20:44,391 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) [2021-08-29 16:20:44,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-29 16:20:44,394 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 16:20:44,395 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 16:20:44,395 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 16:20:44,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 16:20:44,399 INFO L82 PathProgramCache]: Analyzing trace with hash 1123300790, now seen corresponding path program 1 times [2021-08-29 16:20:44,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 16:20:44,405 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032619513] [2021-08-29 16:20:44,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 16:20:44,405 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 16:20:44,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:20:44,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:20:44,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:20:44,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 16:20:44,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 16:20:44,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032619513] [2021-08-29 16:20:44,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032619513] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 16:20:44,598 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 16:20:44,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-29 16:20:44,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837065715] [2021-08-29 16:20:44,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-29 16:20:44,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 16:20:44,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-29 16:20:44,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-29 16:20:44,628 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) [2021-08-29 16:20:44,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 16:20:44,765 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2021-08-29 16:20:44,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-29 16:20:44,767 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 [2021-08-29 16:20:44,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 16:20:44,773 INFO L225 Difference]: With dead ends: 39 [2021-08-29 16:20:44,773 INFO L226 Difference]: Without dead ends: 27 [2021-08-29 16:20:44,776 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.63ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-29 16:20:44,781 INFO L928 BasicCegarLoop]: 7 mSDtfsCounter, 15 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 86.41ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.73ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 106.60ms IncrementalHoareTripleChecker+Time [2021-08-29 16:20:44,782 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 18 Invalid, 102 Unknown, 0 Unchecked, 1.73ms Time], IncrementalHoareTripleChecker [0 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 106.60ms Time] [2021-08-29 16:20:44,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-08-29 16:20:44,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-08-29 16:20:44,813 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) [2021-08-29 16:20:44,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2021-08-29 16:20:44,816 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 10 [2021-08-29 16:20:44,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 16:20:44,816 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2021-08-29 16:20:44,817 INFO L471 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) [2021-08-29 16:20:44,817 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2021-08-29 16:20:44,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-29 16:20:44,818 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 16:20:44,818 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 16:20:44,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-29 16:20:44,819 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 16:20:44,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 16:20:44,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1177745932, now seen corresponding path program 1 times [2021-08-29 16:20:44,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 16:20:44,823 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583792329] [2021-08-29 16:20:44,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 16:20:44,824 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 16:20:44,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:20:44,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:20:44,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:20:44,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 16:20:44,864 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 16:20:44,864 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583792329] [2021-08-29 16:20:44,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583792329] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 16:20:44,864 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 16:20:44,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-29 16:20:44,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463525907] [2021-08-29 16:20:44,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-29 16:20:44,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 16:20:44,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-29 16:20:44,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-29 16:20:44,866 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) [2021-08-29 16:20:44,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 16:20:44,922 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2021-08-29 16:20:44,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-29 16:20:44,922 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 [2021-08-29 16:20:44,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 16:20:44,923 INFO L225 Difference]: With dead ends: 33 [2021-08-29 16:20:44,923 INFO L226 Difference]: Without dead ends: 29 [2021-08-29 16:20:44,924 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.20ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-29 16:20:44,925 INFO L928 BasicCegarLoop]: 7 mSDtfsCounter, 10 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 35.98ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.07ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 45.35ms IncrementalHoareTripleChecker+Time [2021-08-29 16:20:44,925 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 18 Invalid, 90 Unknown, 0 Unchecked, 1.07ms Time], IncrementalHoareTripleChecker [1 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 45.35ms Time] [2021-08-29 16:20:44,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-08-29 16:20:44,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2021-08-29 16:20:44,929 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) [2021-08-29 16:20:44,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2021-08-29 16:20:44,930 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 11 [2021-08-29 16:20:44,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 16:20:44,930 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2021-08-29 16:20:44,931 INFO L471 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) [2021-08-29 16:20:44,931 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2021-08-29 16:20:44,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-29 16:20:44,932 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 16:20:44,932 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 16:20:44,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-29 16:20:44,932 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 16:20:44,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 16:20:44,933 INFO L82 PathProgramCache]: Analyzing trace with hash 2110588723, now seen corresponding path program 1 times [2021-08-29 16:20:44,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 16:20:44,933 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210738241] [2021-08-29 16:20:44,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 16:20:44,933 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 16:20:44,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:20:44,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:20:44,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:20:45,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-08-29 16:20:45,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:20:45,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-08-29 16:20:45,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:20:45,038 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-29 16:20:45,038 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 16:20:45,039 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210738241] [2021-08-29 16:20:45,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210738241] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 16:20:45,039 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66879386] [2021-08-29 16:20:45,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 16:20:45,039 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 16:20:45,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 16:20:45,049 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) [2021-08-29 16:20:45,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-29 16:20:45,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:20:45,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-29 16:20:45,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 16:20:45,181 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-29 16:20:45,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 16:20:45,365 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-29 16:20:45,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66879386] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 16:20:45,366 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 16:20:45,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2021-08-29 16:20:45,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023642499] [2021-08-29 16:20:45,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-29 16:20:45,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 16:20:45,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-29 16:20:45,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-08-29 16:20:45,372 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) [2021-08-29 16:20:45,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 16:20:45,575 INFO L93 Difference]: Finished difference Result 55 states and 75 transitions. [2021-08-29 16:20:45,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-29 16:20:45,576 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 [2021-08-29 16:20:45,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 16:20:45,576 INFO L225 Difference]: With dead ends: 55 [2021-08-29 16:20:45,577 INFO L226 Difference]: Without dead ends: 31 [2021-08-29 16:20:45,581 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 122.48ms TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-08-29 16:20:45,582 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 34 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 91.95ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.99ms SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 132.02ms IncrementalHoareTripleChecker+Time [2021-08-29 16:20:45,583 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 29 Invalid, 237 Unknown, 0 Unchecked, 2.99ms Time], IncrementalHoareTripleChecker [15 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 132.02ms Time] [2021-08-29 16:20:45,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-08-29 16:20:45,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2021-08-29 16:20:45,586 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) [2021-08-29 16:20:45,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2021-08-29 16:20:45,587 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 23 [2021-08-29 16:20:45,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 16:20:45,588 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2021-08-29 16:20:45,588 INFO L471 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) [2021-08-29 16:20:45,588 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2021-08-29 16:20:45,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-29 16:20:45,589 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 16:20:45,589 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 16:20:45,609 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-29 16:20:45,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 16:20:45,805 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 16:20:45,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 16:20:45,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1277869167, now seen corresponding path program 1 times [2021-08-29 16:20:45,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 16:20:45,805 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601057464] [2021-08-29 16:20:45,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 16:20:45,806 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 16:20:45,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:20:45,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:20:45,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:20:45,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-08-29 16:20:45,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:20:45,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-08-29 16:20:45,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:20:45,952 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-29 16:20:45,952 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 16:20:45,952 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601057464] [2021-08-29 16:20:45,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601057464] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 16:20:45,952 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473327771] [2021-08-29 16:20:45,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 16:20:45,953 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 16:20:45,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 16:20:45,955 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) [2021-08-29 16:20:45,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-29 16:20:45,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:20:45,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-29 16:20:45,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 16:20:46,148 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-29 16:20:46,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 16:20:46,263 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-29 16:20:46,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473327771] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 16:20:46,264 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 16:20:46,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 10 [2021-08-29 16:20:46,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712218615] [2021-08-29 16:20:46,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-29 16:20:46,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 16:20:46,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-29 16:20:46,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-08-29 16:20:46,266 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) [2021-08-29 16:20:46,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 16:20:46,346 INFO L93 Difference]: Finished difference Result 43 states and 56 transitions. [2021-08-29 16:20:46,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-29 16:20:46,347 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 [2021-08-29 16:20:46,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 16:20:46,348 INFO L225 Difference]: With dead ends: 43 [2021-08-29 16:20:46,348 INFO L226 Difference]: Without dead ends: 39 [2021-08-29 16:20:46,349 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 48 SyntacticMatches, 5 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 55.48ms TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-08-29 16:20:46,349 INFO L928 BasicCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 56.05ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.62ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 72.71ms IncrementalHoareTripleChecker+Time [2021-08-29 16:20:46,350 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 123 Invalid, 210 Unknown, 0 Unchecked, 1.62ms Time], IncrementalHoareTripleChecker [1 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 72.71ms Time] [2021-08-29 16:20:46,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-08-29 16:20:46,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 34. [2021-08-29 16:20:46,354 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) [2021-08-29 16:20:46,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions. [2021-08-29 16:20:46,355 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 24 [2021-08-29 16:20:46,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 16:20:46,355 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions. [2021-08-29 16:20:46,355 INFO L471 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) [2021-08-29 16:20:46,355 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2021-08-29 16:20:46,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-29 16:20:46,356 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 16:20:46,356 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 16:20:46,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-29 16:20:46,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-08-29 16:20:46,573 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 16:20:46,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 16:20:46,573 INFO L82 PathProgramCache]: Analyzing trace with hash 988182601, now seen corresponding path program 1 times [2021-08-29 16:20:46,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 16:20:46,573 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920030754] [2021-08-29 16:20:46,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 16:20:46,574 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 16:20:46,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:20:46,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:20:46,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:20:46,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-08-29 16:20:46,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:20:46,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-08-29 16:20:46,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:20:46,634 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-29 16:20:46,635 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 16:20:46,635 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920030754] [2021-08-29 16:20:46,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920030754] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 16:20:46,635 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014928326] [2021-08-29 16:20:46,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 16:20:46,635 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 16:20:46,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 16:20:46,649 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) [2021-08-29 16:20:46,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-29 16:20:46,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:20:46,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-29 16:20:46,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 16:20:46,776 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-29 16:20:46,776 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-29 16:20:46,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014928326] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 16:20:46,776 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-29 16:20:46,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 12 [2021-08-29 16:20:46,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515014004] [2021-08-29 16:20:46,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-29 16:20:46,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 16:20:46,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-29 16:20:46,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-08-29 16:20:46,778 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) [2021-08-29 16:20:46,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 16:20:46,854 INFO L93 Difference]: Finished difference Result 41 states and 53 transitions. [2021-08-29 16:20:46,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-29 16:20:46,855 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 [2021-08-29 16:20:46,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 16:20:46,858 INFO L225 Difference]: With dead ends: 41 [2021-08-29 16:20:46,858 INFO L226 Difference]: Without dead ends: 37 [2021-08-29 16:20:46,858 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 43.83ms TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-08-29 16:20:46,859 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 17 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 48.58ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.81ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 58.88ms IncrementalHoareTripleChecker+Time [2021-08-29 16:20:46,859 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 20 Invalid, 162 Unknown, 0 Unchecked, 0.81ms Time], IncrementalHoareTripleChecker [4 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 58.88ms Time] [2021-08-29 16:20:46,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-08-29 16:20:46,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2021-08-29 16:20:46,867 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) [2021-08-29 16:20:46,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions. [2021-08-29 16:20:46,868 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 25 [2021-08-29 16:20:46,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 16:20:46,868 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions. [2021-08-29 16:20:46,869 INFO L471 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) [2021-08-29 16:20:46,869 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2021-08-29 16:20:46,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-29 16:20:46,874 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 16:20:46,874 INFO L513 BasicCegarLoop]: 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] [2021-08-29 16:20:46,893 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-29 16:20:47,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 16:20:47,089 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 16:20:47,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 16:20:47,089 INFO L82 PathProgramCache]: Analyzing trace with hash -2061621832, now seen corresponding path program 1 times [2021-08-29 16:20:47,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 16:20:47,089 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758226944] [2021-08-29 16:20:47,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 16:20:47,090 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 16:20:47,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:20:47,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:20:47,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:20:47,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-08-29 16:20:47,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:20:47,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-08-29 16:20:47,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:20:47,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-08-29 16:20:47,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:20:47,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-08-29 16:20:47,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:20:47,152 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-29 16:20:47,153 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 16:20:47,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758226944] [2021-08-29 16:20:47,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758226944] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 16:20:47,154 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829008320] [2021-08-29 16:20:47,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 16:20:47,154 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 16:20:47,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 16:20:47,157 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) [2021-08-29 16:20:47,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-29 16:20:47,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:20:47,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-29 16:20:47,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 16:20:47,313 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-08-29 16:20:47,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 16:20:47,535 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-08-29 16:20:47,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829008320] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 16:20:47,535 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 16:20:47,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 16 [2021-08-29 16:20:47,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995109490] [2021-08-29 16:20:47,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-29 16:20:47,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 16:20:47,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-29 16:20:47,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-08-29 16:20:47,538 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) [2021-08-29 16:20:47,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 16:20:47,694 INFO L93 Difference]: Finished difference Result 66 states and 98 transitions. [2021-08-29 16:20:47,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-29 16:20:47,696 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 [2021-08-29 16:20:47,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 16:20:47,696 INFO L225 Difference]: With dead ends: 66 [2021-08-29 16:20:47,696 INFO L226 Difference]: Without dead ends: 0 [2021-08-29 16:20:47,699 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 87.35ms TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-08-29 16:20:47,700 INFO L928 BasicCegarLoop]: 6 mSDtfsCounter, 38 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 103.78ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.53ms SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 126.43ms IncrementalHoareTripleChecker+Time [2021-08-29 16:20:47,702 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 39 Invalid, 279 Unknown, 0 Unchecked, 1.53ms Time], IncrementalHoareTripleChecker [17 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 126.43ms Time] [2021-08-29 16:20:47,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-29 16:20:47,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-29 16:20:47,702 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) [2021-08-29 16:20:47,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-29 16:20:47,703 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 36 [2021-08-29 16:20:47,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 16:20:47,703 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-29 16:20:47,703 INFO L471 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) [2021-08-29 16:20:47,703 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-29 16:20:47,703 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-29 16:20:47,705 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-08-29 16:20:47,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-29 16:20:47,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 16:20:47,922 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-08-29 16:20:47,925 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 16:20:47,927 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 16:20:47,927 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 16:20:47,929 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 16:20:47,929 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 16:20:47,930 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 16:20:47,931 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 16:20:47,932 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 16:20:47,933 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 16:20:47,933 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 16:20:47,933 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 16:20:47,937 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 16:20:47,937 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 16:20:47,938 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 16:20:47,938 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 16:20:47,938 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 16:20:47,939 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 16:20:47,939 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 16:20:47,939 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 16:20:47,940 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 16:20:47,940 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 16:20:47,941 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 16:20:47,941 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 16:20:47,941 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 16:20:47,942 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 16:20:47,942 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 16:20:47,942 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 16:20:47,943 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 16:20:47,943 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 16:20:47,944 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 16:20:47,944 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 16:20:47,945 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 16:20:47,945 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 16:20:47,945 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 16:20:47,946 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 16:20:47,946 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 16:20:47,947 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 16:20:47,947 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 16:20:47,948 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 16:20:47,948 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 16:20:47,949 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 16:20:47,950 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 16:20:47,952 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 16:20:47,953 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 16:20:47,953 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 16:20:47,953 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 16:20:47,954 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 16:20:47,993 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-08-29 16:20:47,994 INFO L858 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-08-29 16:20:47,994 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-08-29 16:20:47,994 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-08-29 16:20:47,994 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 41) no Hoare annotation was computed. [2021-08-29 16:20:47,994 INFO L854 garLoopResultBuilder]: At program point L43(lines 37 44) the Hoare annotation is: (= ULTIMATE.start_main_~x~0 2) [2021-08-29 16:20:47,994 INFO L858 garLoopResultBuilder]: For program point L41(line 41) no Hoare annotation was computed. [2021-08-29 16:20:47,994 INFO L858 garLoopResultBuilder]: For program point L40(lines 40 42) no Hoare annotation was computed. [2021-08-29 16:20:47,994 INFO L854 garLoopResultBuilder]: At program point L39(line 39) the Hoare annotation is: (= ULTIMATE.start_main_~x~0 2) [2021-08-29 16:20:47,994 INFO L858 garLoopResultBuilder]: For program point L39-1(line 39) no Hoare annotation was computed. [2021-08-29 16:20:47,994 INFO L858 garLoopResultBuilder]: For program point L40-2(lines 40 42) no Hoare annotation was computed. [2021-08-29 16:20:47,995 INFO L861 garLoopResultBuilder]: At program point fibo2ENTRY(lines 19 27) the Hoare annotation is: true [2021-08-29 16:20:47,995 INFO L854 garLoopResultBuilder]: At program point L25(line 25) the Hoare annotation is: (and (= fibo2_~n |fibo2_#in~n|) (< 1 fibo2_~n)) [2021-08-29 16:20:47,995 INFO L858 garLoopResultBuilder]: For program point L25-1(line 25) no Hoare annotation was computed. [2021-08-29 16:20:47,995 INFO L854 garLoopResultBuilder]: At program point L25-2(line 25) the Hoare annotation is: (and (= fibo2_~n |fibo2_#in~n|) (< 1 fibo2_~n)) [2021-08-29 16:20:47,995 INFO L858 garLoopResultBuilder]: For program point L22(lines 22 26) no Hoare annotation was computed. [2021-08-29 16:20:47,995 INFO L858 garLoopResultBuilder]: For program point L25-3(line 25) no Hoare annotation was computed. [2021-08-29 16:20:47,995 INFO L858 garLoopResultBuilder]: For program point L20(lines 20 26) no Hoare annotation was computed. [2021-08-29 16:20:47,995 INFO L858 garLoopResultBuilder]: For program point fibo2FINAL(lines 19 27) no Hoare annotation was computed. [2021-08-29 16:20:47,995 INFO L858 garLoopResultBuilder]: For program point fibo2EXIT(lines 19 27) no Hoare annotation was computed. [2021-08-29 16:20:47,996 INFO L861 garLoopResultBuilder]: At program point fibo1ENTRY(lines 9 17) the Hoare annotation is: true [2021-08-29 16:20:47,996 INFO L854 garLoopResultBuilder]: At program point L15(line 15) the Hoare annotation is: (and (< 1 fibo1_~n) (= fibo1_~n |fibo1_#in~n|)) [2021-08-29 16:20:47,996 INFO L858 garLoopResultBuilder]: For program point L15-1(line 15) no Hoare annotation was computed. [2021-08-29 16:20:47,996 INFO L854 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 (<= |fibo1_#t~ret7| 1) (<= 1 |fibo1_#t~ret7|) (< 1 fibo1_~n) .cse0))) [2021-08-29 16:20:47,996 INFO L858 garLoopResultBuilder]: For program point L12(lines 12 16) no Hoare annotation was computed. [2021-08-29 16:20:47,996 INFO L858 garLoopResultBuilder]: For program point L15-3(line 15) no Hoare annotation was computed. [2021-08-29 16:20:47,996 INFO L858 garLoopResultBuilder]: For program point fibo1FINAL(lines 9 17) no Hoare annotation was computed. [2021-08-29 16:20:47,996 INFO L858 garLoopResultBuilder]: For program point L10(lines 10 16) no Hoare annotation was computed. [2021-08-29 16:20:47,997 INFO L858 garLoopResultBuilder]: For program point fibo1EXIT(lines 9 17) no Hoare annotation was computed. [2021-08-29 16:20:47,999 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-29 16:20:48,007 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.08 04:20:48 BoogieIcfgContainer [2021-08-29 16:20:48,007 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-29 16:20:48,008 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-29 16:20:48,008 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-29 16:20:48,008 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-29 16:20:48,008 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 04:20:44" (3/4) ... [2021-08-29 16:20:48,010 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-08-29 16:20:48,014 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo2 [2021-08-29 16:20:48,014 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo1 [2021-08-29 16:20:48,016 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2021-08-29 16:20:48,016 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-08-29 16:20:48,017 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-29 16:20:48,017 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-29 16:20:48,035 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-29 16:20:48,035 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-29 16:20:48,035 INFO L158 Benchmark]: Toolchain (without parser) took 4085.80ms. Allocated memory was 62.9MB in the beginning and 79.7MB in the end (delta: 16.8MB). Free memory was 43.5MB in the beginning and 39.6MB in the end (delta: 3.9MB). Peak memory consumption was 20.0MB. Max. memory is 16.1GB. [2021-08-29 16:20:48,036 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 62.9MB. Free memory was 44.9MB in the beginning and 44.9MB in the end (delta: 43.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 16:20:48,036 INFO L158 Benchmark]: CACSL2BoogieTranslator took 157.77ms. Allocated memory is still 62.9MB. Free memory was 43.3MB in the beginning and 33.8MB in the end (delta: 9.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-08-29 16:20:48,036 INFO L158 Benchmark]: Boogie Procedure Inliner took 38.32ms. Allocated memory is still 62.9MB. Free memory was 33.8MB in the beginning and 46.4MB in the end (delta: -12.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-08-29 16:20:48,037 INFO L158 Benchmark]: Boogie Preprocessor took 21.98ms. Allocated memory is still 62.9MB. Free memory was 46.4MB in the beginning and 45.5MB in the end (delta: 918.4kB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 16:20:48,037 INFO L158 Benchmark]: RCFGBuilder took 171.32ms. Allocated memory is still 62.9MB. Free memory was 45.5MB in the beginning and 36.9MB in the end (delta: 8.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-08-29 16:20:48,037 INFO L158 Benchmark]: TraceAbstraction took 3662.66ms. Allocated memory was 62.9MB in the beginning and 79.7MB in the end (delta: 16.8MB). Free memory was 36.5MB in the beginning and 42.4MB in the end (delta: -5.9MB). Peak memory consumption was 13.0MB. Max. memory is 16.1GB. [2021-08-29 16:20:48,037 INFO L158 Benchmark]: Witness Printer took 27.20ms. Allocated memory is still 79.7MB. Free memory was 42.4MB in the beginning and 39.6MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-29 16:20:48,039 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 62.9MB. Free memory was 44.9MB in the beginning and 44.9MB in the end (delta: 43.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 157.77ms. Allocated memory is still 62.9MB. Free memory was 43.3MB in the beginning and 33.8MB in the end (delta: 9.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 38.32ms. Allocated memory is still 62.9MB. Free memory was 33.8MB in the beginning and 46.4MB in the end (delta: -12.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 21.98ms. Allocated memory is still 62.9MB. Free memory was 46.4MB in the beginning and 45.5MB in the end (delta: 918.4kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 171.32ms. Allocated memory is still 62.9MB. Free memory was 45.5MB in the beginning and 36.9MB in the end (delta: 8.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 3662.66ms. Allocated memory was 62.9MB in the beginning and 79.7MB in the end (delta: 16.8MB). Free memory was 36.5MB in the beginning and 42.4MB in the end (delta: -5.9MB). Peak memory consumption was 13.0MB. Max. memory is 16.1GB. * Witness Printer took 27.20ms. Allocated memory is still 79.7MB. Free memory was 42.4MB in the beginning and 39.6MB in the end (delta: 2.8MB). 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, 0.00ms ErrorAutomatonConstructionTimeTotal, 0.00ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.00ms ErrorAutomatonConstructionTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeAvg, 0.00ms 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: 3622.75ms, OverallIterations: 6, TraceHistogramMax: 3, EmptinessCheckTime: 13.45ms, AutomataDifference: 789.05ms, DeadEndRemovalTime: 0.00ms, HoareAnnotationTime: 72.27ms, InitialAbstractionConstructionTime: 6.71ms, PartialOrderReductionTime: 0.00ms, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 132 SdHoareTripleChecker+Valid, 541.99ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 114 mSDsluCounter, 247 SdHoareTripleChecker+Invalid, 422.75ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 664 mSDsCounter, 38 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1042 IncrementalHoareTripleChecker+Invalid, 1080 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 38 mSolverCounterUnsat, 45 mSDtfsCounter, 1042 mSolverCounterSat, 9.75ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 273 GetRequests, 204 SyntacticMatches, 8 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 355.97ms Time, 0.00ms 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, 0.00ms DumpTime, AutomataMinimizationStatistics: 44.35ms AutomataMinimizationTime, 6 MinimizatonAttempts, 12 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.00ms HoareAnnotationTime, 8 LocationsWithAnnotation, 47 PreInvPairs, 57 NumberOfFragments, 50 HoareAnnotationTreeSize, 47 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 30.01ms HoareSimplificationTime, 8 FomulaSimplificationsInter, 37 FormulaSimplificationTreeSizeReductionInter, 36.75ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 24.56ms SsaConstructionTime, 111.93ms SatisfiabilityAnalysisTime, 1440.33ms InterpolantComputationTime, 237 NumberOfCodeBlocks, 237 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 307 ConstructedInterpolants, 0 QuantifiedInterpolants, 772 SizeOfPredicates, 7 NumberOfNonLiveVariables, 355 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: x == 2 RESULT: Ultimate proved your program to be correct! [2021-08-29 16:20:48,063 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...