./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive/Fibonacci01-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 54858612 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/Fibonacci01-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a7a7e948458662610557b74203cf7c9c5c696340 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-5485861 [2020-10-25 23:09:11,082 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-25 23:09:11,084 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-25 23:09:11,118 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-25 23:09:11,119 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-25 23:09:11,121 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-25 23:09:11,122 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-25 23:09:11,125 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-25 23:09:11,127 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-25 23:09:11,128 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-25 23:09:11,129 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-25 23:09:11,131 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-25 23:09:11,131 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-25 23:09:11,132 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-25 23:09:11,134 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-25 23:09:11,135 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-25 23:09:11,136 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-25 23:09:11,137 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-25 23:09:11,139 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-25 23:09:11,141 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-25 23:09:11,143 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-25 23:09:11,145 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-25 23:09:11,146 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-25 23:09:11,147 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-25 23:09:11,151 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-25 23:09:11,151 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-25 23:09:11,151 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-25 23:09:11,152 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-25 23:09:11,153 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-25 23:09:11,154 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-25 23:09:11,155 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-25 23:09:11,156 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-25 23:09:11,157 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-25 23:09:11,158 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-25 23:09:11,159 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-25 23:09:11,159 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-25 23:09:11,160 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-25 23:09:11,161 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-25 23:09:11,161 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-25 23:09:11,162 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-25 23:09:11,163 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-25 23:09:11,164 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-25 23:09:11,193 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-25 23:09:11,193 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-25 23:09:11,195 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-25 23:09:11,195 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-25 23:09:11,196 INFO L138 SettingsManager]: * Use SBE=true [2020-10-25 23:09:11,196 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-25 23:09:11,197 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-25 23:09:11,197 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-25 23:09:11,197 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-25 23:09:11,198 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-25 23:09:11,198 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-25 23:09:11,198 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-25 23:09:11,199 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-25 23:09:11,199 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-25 23:09:11,199 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-25 23:09:11,200 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-25 23:09:11,200 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-25 23:09:11,200 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-25 23:09:11,200 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-25 23:09:11,201 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-25 23:09:11,201 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-25 23:09:11,201 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-25 23:09:11,202 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-25 23:09:11,202 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-25 23:09:11,202 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-25 23:09:11,202 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-25 23:09:11,203 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-25 23:09:11,203 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-25 23:09:11,203 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-25 23:09:11,203 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a7a7e948458662610557b74203cf7c9c5c696340 [2020-10-25 23:09:11,593 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-25 23:09:11,633 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-25 23:09:11,638 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-25 23:09:11,639 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-25 23:09:11,640 INFO L275 PluginConnector]: CDTParser initialized [2020-10-25 23:09:11,641 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive/Fibonacci01-1.c [2020-10-25 23:09:11,727 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/df042cfe4/87eae1cc18b645eaa41894371b591989/FLAG7eaf34dbf [2020-10-25 23:09:12,347 INFO L306 CDTParser]: Found 1 translation units. [2020-10-25 23:09:12,347 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/Fibonacci01-1.c [2020-10-25 23:09:12,355 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/df042cfe4/87eae1cc18b645eaa41894371b591989/FLAG7eaf34dbf [2020-10-25 23:09:12,719 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/df042cfe4/87eae1cc18b645eaa41894371b591989 [2020-10-25 23:09:12,724 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-25 23:09:12,731 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-25 23:09:12,733 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-25 23:09:12,734 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-25 23:09:12,738 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-25 23:09:12,739 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 11:09:12" (1/1) ... [2020-10-25 23:09:12,743 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a492297 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 11:09:12, skipping insertion in model container [2020-10-25 23:09:12,743 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 11:09:12" (1/1) ... [2020-10-25 23:09:12,752 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-25 23:09:12,767 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-25 23:09:12,969 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-25 23:09:12,981 INFO L203 MainTranslator]: Completed pre-run [2020-10-25 23:09:13,000 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-25 23:09:13,017 INFO L208 MainTranslator]: Completed translation [2020-10-25 23:09:13,018 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 11:09:13 WrapperNode [2020-10-25 23:09:13,018 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-25 23:09:13,020 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-25 23:09:13,020 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-25 23:09:13,021 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-25 23:09:13,031 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 11:09:13" (1/1) ... [2020-10-25 23:09:13,039 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 11:09:13" (1/1) ... [2020-10-25 23:09:13,059 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-25 23:09:13,060 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-25 23:09:13,061 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-25 23:09:13,061 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-25 23:09:13,071 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 11:09:13" (1/1) ... [2020-10-25 23:09:13,071 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 11:09:13" (1/1) ... [2020-10-25 23:09:13,073 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 11:09:13" (1/1) ... [2020-10-25 23:09:13,073 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 11:09:13" (1/1) ... [2020-10-25 23:09:13,077 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 11:09:13" (1/1) ... [2020-10-25 23:09:13,080 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 11:09:13" (1/1) ... [2020-10-25 23:09:13,081 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 11:09:13" (1/1) ... [2020-10-25 23:09:13,083 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-25 23:09:13,085 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-25 23:09:13,085 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-25 23:09:13,085 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-25 23:09:13,086 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 11:09:13" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-25 23:09:13,170 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2020-10-25 23:09:13,170 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2020-10-25 23:09:13,171 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-25 23:09:13,171 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-25 23:09:13,171 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-25 23:09:13,171 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-25 23:09:13,415 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-25 23:09:13,416 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-25 23:09:13,418 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 11:09:13 BoogieIcfgContainer [2020-10-25 23:09:13,418 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-25 23:09:13,420 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-25 23:09:13,420 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-25 23:09:13,424 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-25 23:09:13,425 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.10 11:09:12" (1/3) ... [2020-10-25 23:09:13,426 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18e16f62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 11:09:13, skipping insertion in model container [2020-10-25 23:09:13,426 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 11:09:13" (2/3) ... [2020-10-25 23:09:13,427 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18e16f62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 11:09:13, skipping insertion in model container [2020-10-25 23:09:13,428 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 11:09:13" (3/3) ... [2020-10-25 23:09:13,430 INFO L111 eAbstractionObserver]: Analyzing ICFG Fibonacci01-1.c [2020-10-25 23:09:13,444 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-25 23:09:13,449 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-25 23:09:13,487 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-25 23:09:13,553 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-25 23:09:13,556 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-25 23:09:13,557 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-25 23:09:13,557 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-25 23:09:13,557 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-25 23:09:13,557 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-25 23:09:13,558 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-25 23:09:13,558 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-25 23:09:13,599 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-10-25 23:09:13,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-25 23:09:13,615 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 23:09:13,616 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 23:09:13,617 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 23:09:13,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 23:09:13,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1130427778, now seen corresponding path program 1 times [2020-10-25 23:09:13,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 23:09:13,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764824345] [2020-10-25 23:09:13,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 23:09:13,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:09:14,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-25 23:09:14,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:09:14,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 23:09:14,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764824345] [2020-10-25 23:09:14,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 23:09:14,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-25 23:09:14,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096630638] [2020-10-25 23:09:14,123 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-25 23:09:14,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 23:09:14,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-25 23:09:14,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-25 23:09:14,150 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 6 states. [2020-10-25 23:09:14,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 23:09:14,310 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2020-10-25 23:09:14,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-25 23:09:14,312 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-10-25 23:09:14,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 23:09:14,322 INFO L225 Difference]: With dead ends: 33 [2020-10-25 23:09:14,323 INFO L226 Difference]: Without dead ends: 19 [2020-10-25 23:09:14,326 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-25 23:09:14,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-25 23:09:14,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-25 23:09:14,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-25 23:09:14,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2020-10-25 23:09:14,373 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 11 [2020-10-25 23:09:14,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 23:09:14,374 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2020-10-25 23:09:14,374 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-25 23:09:14,375 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2020-10-25 23:09:14,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-25 23:09:14,376 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 23:09:14,377 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 23:09:14,377 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-25 23:09:14,377 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 23:09:14,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 23:09:14,378 INFO L82 PathProgramCache]: Analyzing trace with hash 1373030608, now seen corresponding path program 1 times [2020-10-25 23:09:14,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 23:09:14,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633508389] [2020-10-25 23:09:14,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 23:09:14,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:09:14,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-25 23:09:14,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:09:14,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 23:09:14,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633508389] [2020-10-25 23:09:14,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 23:09:14,476 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-25 23:09:14,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268571034] [2020-10-25 23:09:14,478 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-25 23:09:14,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 23:09:14,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-25 23:09:14,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-25 23:09:14,481 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand 6 states. [2020-10-25 23:09:14,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 23:09:14,593 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2020-10-25 23:09:14,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-25 23:09:14,594 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-10-25 23:09:14,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 23:09:14,595 INFO L225 Difference]: With dead ends: 25 [2020-10-25 23:09:14,595 INFO L226 Difference]: Without dead ends: 21 [2020-10-25 23:09:14,597 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-25 23:09:14,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-25 23:09:14,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2020-10-25 23:09:14,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-25 23:09:14,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2020-10-25 23:09:14,605 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 12 [2020-10-25 23:09:14,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 23:09:14,605 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2020-10-25 23:09:14,605 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-25 23:09:14,606 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2020-10-25 23:09:14,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-25 23:09:14,607 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 23:09:14,607 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 23:09:14,608 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-25 23:09:14,608 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 23:09:14,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 23:09:14,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1177011487, now seen corresponding path program 1 times [2020-10-25 23:09:14,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 23:09:14,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521932471] [2020-10-25 23:09:14,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 23:09:14,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:09:14,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-25 23:09:14,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:09:14,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-25 23:09:14,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:09:14,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-25 23:09:14,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:09:14,758 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-25 23:09:14,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521932471] [2020-10-25 23:09:14,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236681166] [2020-10-25 23:09:14,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 23:09:14,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:09:14,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-25 23:09:14,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 23:09:15,063 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-25 23:09:15,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 23:09:15,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10] total 14 [2020-10-25 23:09:15,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320694677] [2020-10-25 23:09:15,065 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-25 23:09:15,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 23:09:15,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-25 23:09:15,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2020-10-25 23:09:15,066 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand 14 states. [2020-10-25 23:09:15,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 23:09:15,228 INFO L93 Difference]: Finished difference Result 36 states and 47 transitions. [2020-10-25 23:09:15,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-25 23:09:15,229 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 24 [2020-10-25 23:09:15,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 23:09:15,230 INFO L225 Difference]: With dead ends: 36 [2020-10-25 23:09:15,230 INFO L226 Difference]: Without dead ends: 21 [2020-10-25 23:09:15,232 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-10-25 23:09:15,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-25 23:09:15,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-10-25 23:09:15,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-25 23:09:15,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-10-25 23:09:15,239 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 24 [2020-10-25 23:09:15,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 23:09:15,239 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-10-25 23:09:15,239 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-25 23:09:15,240 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-10-25 23:09:15,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-25 23:09:15,241 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 23:09:15,241 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 23:09:15,454 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-10-25 23:09:15,455 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 23:09:15,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 23:09:15,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1178789999, now seen corresponding path program 1 times [2020-10-25 23:09:15,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 23:09:15,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344597379] [2020-10-25 23:09:15,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 23:09:15,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:09:15,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-25 23:09:15,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:09:15,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-25 23:09:15,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:09:15,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-25 23:09:15,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:09:15,684 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-25 23:09:15,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344597379] [2020-10-25 23:09:15,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978562159] [2020-10-25 23:09:15,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 23:09:15,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:09:15,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-25 23:09:15,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 23:09:15,910 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-25 23:09:15,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 23:09:15,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2020-10-25 23:09:15,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582803762] [2020-10-25 23:09:15,912 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-25 23:09:15,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 23:09:15,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-25 23:09:15,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-10-25 23:09:15,913 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 17 states. [2020-10-25 23:09:16,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 23:09:16,157 INFO L93 Difference]: Finished difference Result 31 states and 40 transitions. [2020-10-25 23:09:16,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-25 23:09:16,158 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 25 [2020-10-25 23:09:16,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 23:09:16,160 INFO L225 Difference]: With dead ends: 31 [2020-10-25 23:09:16,160 INFO L226 Difference]: Without dead ends: 27 [2020-10-25 23:09:16,162 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2020-10-25 23:09:16,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-25 23:09:16,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2020-10-25 23:09:16,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-25 23:09:16,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 35 transitions. [2020-10-25 23:09:16,171 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 35 transitions. Word has length 25 [2020-10-25 23:09:16,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 23:09:16,171 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 35 transitions. [2020-10-25 23:09:16,171 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-25 23:09:16,172 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 35 transitions. [2020-10-25 23:09:16,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-25 23:09:16,174 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 23:09:16,174 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 23:09:16,388 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 23:09:16,389 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 23:09:16,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 23:09:16,390 INFO L82 PathProgramCache]: Analyzing trace with hash -1759764718, now seen corresponding path program 2 times [2020-10-25 23:09:16,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 23:09:16,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55336030] [2020-10-25 23:09:16,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 23:09:16,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:09:16,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-25 23:09:16,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:09:16,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-25 23:09:16,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:09:16,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-25 23:09:16,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:09:16,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-25 23:09:16,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:09:16,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-25 23:09:16,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:09:16,518 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 23 proven. 7 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-10-25 23:09:16,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55336030] [2020-10-25 23:09:16,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032723212] [2020-10-25 23:09:16,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 23:09:16,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-25 23:09:16,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 23:09:16,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-25 23:09:16,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 23:09:16,778 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 22 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-25 23:09:16,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 23:09:16,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 10 [2020-10-25 23:09:16,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124977658] [2020-10-25 23:09:16,779 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-25 23:09:16,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 23:09:16,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-25 23:09:16,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-25 23:09:16,781 INFO L87 Difference]: Start difference. First operand 26 states and 35 transitions. Second operand 10 states. [2020-10-25 23:09:16,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 23:09:16,988 INFO L93 Difference]: Finished difference Result 53 states and 77 transitions. [2020-10-25 23:09:16,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-25 23:09:16,990 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 38 [2020-10-25 23:09:16,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 23:09:16,992 INFO L225 Difference]: With dead ends: 53 [2020-10-25 23:09:16,992 INFO L226 Difference]: Without dead ends: 31 [2020-10-25 23:09:16,993 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-25 23:09:16,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-25 23:09:17,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2020-10-25 23:09:17,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-25 23:09:17,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 36 transitions. [2020-10-25 23:09:17,016 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 36 transitions. Word has length 38 [2020-10-25 23:09:17,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 23:09:17,017 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 36 transitions. [2020-10-25 23:09:17,017 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-25 23:09:17,017 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 36 transitions. [2020-10-25 23:09:17,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-25 23:09:17,018 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 23:09:17,019 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 23:09:17,220 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 23:09:17,221 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 23:09:17,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 23:09:17,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1740609590, now seen corresponding path program 3 times [2020-10-25 23:09:17,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 23:09:17,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440325170] [2020-10-25 23:09:17,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 23:09:17,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:09:17,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-25 23:09:17,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:09:17,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-25 23:09:17,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:09:17,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-25 23:09:17,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:09:17,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-25 23:09:17,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:09:17,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-25 23:09:17,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:09:17,473 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-25 23:09:17,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440325170] [2020-10-25 23:09:17,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599774658] [2020-10-25 23:09:17,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 23:09:17,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-25 23:09:17,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 23:09:17,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-25 23:09:17,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 23:09:17,817 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 22 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-25 23:09:17,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 23:09:17,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2020-10-25 23:09:17,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316720081] [2020-10-25 23:09:17,818 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-25 23:09:17,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 23:09:17,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-25 23:09:17,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2020-10-25 23:09:17,819 INFO L87 Difference]: Start difference. First operand 28 states and 36 transitions. Second operand 21 states. [2020-10-25 23:09:18,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 23:09:18,415 INFO L93 Difference]: Finished difference Result 42 states and 64 transitions. [2020-10-25 23:09:18,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-25 23:09:18,416 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 39 [2020-10-25 23:09:18,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 23:09:18,417 INFO L225 Difference]: With dead ends: 42 [2020-10-25 23:09:18,417 INFO L226 Difference]: Without dead ends: 0 [2020-10-25 23:09:18,419 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=172, Invalid=820, Unknown=0, NotChecked=0, Total=992 [2020-10-25 23:09:18,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-25 23:09:18,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-25 23:09:18,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-25 23:09:18,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-25 23:09:18,419 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 39 [2020-10-25 23:09:18,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 23:09:18,420 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-25 23:09:18,420 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-25 23:09:18,420 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-25 23:09:18,420 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-25 23:09:18,622 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 23:09:18,626 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-25 23:09:18,833 INFO L274 CegarLoopResult]: For program point fibonacciFINAL(lines 16 24) no Hoare annotation was computed. [2020-10-25 23:09:18,833 INFO L277 CegarLoopResult]: At program point fibonacciENTRY(lines 16 24) the Hoare annotation is: true [2020-10-25 23:09:18,834 INFO L270 CegarLoopResult]: At program point L22(line 22) the Hoare annotation is: (and (= fibonacci_~n |fibonacci_#in~n|) (<= 2 |fibonacci_#in~n|)) [2020-10-25 23:09:18,834 INFO L274 CegarLoopResult]: For program point L22-1(line 22) no Hoare annotation was computed. [2020-10-25 23:09:18,834 INFO L270 CegarLoopResult]: At program point L22-2(line 22) the Hoare annotation is: (let ((.cse0 (= fibonacci_~n |fibonacci_#in~n|))) (or (and (<= 3 fibonacci_~n) .cse0 (<= |fibonacci_#in~n| (+ |fibonacci_#t~ret7| 2))) (and (<= |fibonacci_#in~n| 2) .cse0 (<= 1 |fibonacci_#t~ret7|) (<= 2 |fibonacci_#in~n|)))) [2020-10-25 23:09:18,834 INFO L274 CegarLoopResult]: For program point L19(lines 19 23) no Hoare annotation was computed. [2020-10-25 23:09:18,834 INFO L274 CegarLoopResult]: For program point L22-3(line 22) no Hoare annotation was computed. [2020-10-25 23:09:18,835 INFO L274 CegarLoopResult]: For program point fibonacciEXIT(lines 16 24) no Hoare annotation was computed. [2020-10-25 23:09:18,835 INFO L274 CegarLoopResult]: For program point L17(lines 17 23) no Hoare annotation was computed. [2020-10-25 23:09:18,835 INFO L274 CegarLoopResult]: For program point L33(lines 33 37) no Hoare annotation was computed. [2020-10-25 23:09:18,835 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-25 23:09:18,835 INFO L277 CegarLoopResult]: At program point L32(line 32) the Hoare annotation is: true [2020-10-25 23:09:18,835 INFO L274 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-10-25 23:09:18,835 INFO L274 CegarLoopResult]: For program point L32-1(line 32) no Hoare annotation was computed. [2020-10-25 23:09:18,835 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-10-25 23:09:18,835 INFO L274 CegarLoopResult]: For program point L29(lines 29 31) no Hoare annotation was computed. [2020-10-25 23:09:18,835 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-25 23:09:18,835 INFO L277 CegarLoopResult]: At program point L27(lines 27 38) the Hoare annotation is: true [2020-10-25 23:09:18,836 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-10-25 23:09:18,836 INFO L274 CegarLoopResult]: For program point L36(line 36) no Hoare annotation was computed. [2020-10-25 23:09:18,836 INFO L274 CegarLoopResult]: For program point L3(line 3) no Hoare annotation was computed. [2020-10-25 23:09:18,845 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.10 11:09:18 BoogieIcfgContainer [2020-10-25 23:09:18,846 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-25 23:09:18,846 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-25 23:09:18,846 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-25 23:09:18,847 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-25 23:09:18,847 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 11:09:13" (3/4) ... [2020-10-25 23:09:18,850 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-10-25 23:09:18,857 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibonacci [2020-10-25 23:09:18,862 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2020-10-25 23:09:18,862 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-10-25 23:09:18,863 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-25 23:09:18,863 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-25 23:09:18,917 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-25 23:09:18,917 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-25 23:09:18,922 INFO L168 Benchmark]: Toolchain (without parser) took 6192.16 ms. Allocated memory was 48.2 MB in the beginning and 94.4 MB in the end (delta: 46.1 MB). Free memory was 25.5 MB in the beginning and 50.8 MB in the end (delta: -25.3 MB). Peak memory consumption was 23.2 MB. Max. memory is 16.1 GB. [2020-10-25 23:09:18,923 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 48.2 MB. Free memory is still 27.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 23:09:18,924 INFO L168 Benchmark]: CACSL2BoogieTranslator took 285.79 ms. Allocated memory was 48.2 MB in the beginning and 62.9 MB in the end (delta: 14.7 MB). Free memory was 24.8 MB in the beginning and 41.8 MB in the end (delta: -16.9 MB). Peak memory consumption was 5.4 MB. Max. memory is 16.1 GB. [2020-10-25 23:09:18,925 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.74 ms. Allocated memory is still 62.9 MB. Free memory was 41.6 MB in the beginning and 40.3 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 23:09:18,925 INFO L168 Benchmark]: Boogie Preprocessor took 23.19 ms. Allocated memory is still 62.9 MB. Free memory was 40.3 MB in the beginning and 39.4 MB in the end (delta: 885.0 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-25 23:09:18,926 INFO L168 Benchmark]: RCFGBuilder took 333.64 ms. Allocated memory is still 62.9 MB. Free memory was 39.2 MB in the beginning and 45.2 MB in the end (delta: -5.9 MB). Peak memory consumption was 13.8 MB. Max. memory is 16.1 GB. [2020-10-25 23:09:18,927 INFO L168 Benchmark]: TraceAbstraction took 5425.68 ms. Allocated memory was 62.9 MB in the beginning and 94.4 MB in the end (delta: 31.5 MB). Free memory was 44.9 MB in the beginning and 53.8 MB in the end (delta: -8.9 MB). Peak memory consumption was 20.7 MB. Max. memory is 16.1 GB. [2020-10-25 23:09:18,928 INFO L168 Benchmark]: Witness Printer took 70.85 ms. Allocated memory is still 94.4 MB. Free memory was 53.8 MB in the beginning and 50.8 MB in the end (delta: 3.0 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-10-25 23:09:18,932 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 48.2 MB. Free memory is still 27.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 285.79 ms. Allocated memory was 48.2 MB in the beginning and 62.9 MB in the end (delta: 14.7 MB). Free memory was 24.8 MB in the beginning and 41.8 MB in the end (delta: -16.9 MB). Peak memory consumption was 5.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 39.74 ms. Allocated memory is still 62.9 MB. Free memory was 41.6 MB in the beginning and 40.3 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 23.19 ms. Allocated memory is still 62.9 MB. Free memory was 40.3 MB in the beginning and 39.4 MB in the end (delta: 885.0 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 333.64 ms. Allocated memory is still 62.9 MB. Free memory was 39.2 MB in the beginning and 45.2 MB in the end (delta: -5.9 MB). Peak memory consumption was 13.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 5425.68 ms. Allocated memory was 62.9 MB in the beginning and 94.4 MB in the end (delta: 31.5 MB). Free memory was 44.9 MB in the beginning and 53.8 MB in the end (delta: -8.9 MB). Peak memory consumption was 20.7 MB. Max. memory is 16.1 GB. * Witness Printer took 70.85 ms. Allocated memory is still 94.4 MB. Free memory was 53.8 MB in the beginning and 50.8 MB in the end (delta: 3.0 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 27]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 21 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 5.0s, OverallIterations: 6, TraceHistogramMax: 5, AutomataDifference: 1.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 85 SDtfs, 72 SDslu, 342 SDs, 0 SdLazy, 689 SolverSat, 78 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 232 GetRequests, 144 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 1.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=28occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 6 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 32 PreInvPairs, 49 NumberOfFragments, 36 HoareAnnotationTreeSize, 32 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 5 FomulaSimplificationsInter, 113 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.9s InterpolantComputationTime, 275 NumberOfCodeBlocks, 267 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 265 ConstructedInterpolants, 0 QuantifiedInterpolants, 22114 SizeOfPredicates, 16 NumberOfNonLiveVariables, 386 ConjunctsInSsa, 51 ConjunctsInUnsatCore, 10 InterpolantComputations, 2 PerfectInterpolantSequences, 164/244 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...