./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-invgen/nested9.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cad46833 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_0f21477f-2dc9-4f54-a6dc-0b619cbec6b4/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_0f21477f-2dc9-4f54-a6dc-0b619cbec6b4/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_0f21477f-2dc9-4f54-a6dc-0b619cbec6b4/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_0f21477f-2dc9-4f54-a6dc-0b619cbec6b4/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-invgen/nested9.i -s /tmp/vcloud-vcloud-master/worker/working_dir_0f21477f-2dc9-4f54-a6dc-0b619cbec6b4/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_0f21477f-2dc9-4f54-a6dc-0b619cbec6b4/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 041ac1710be6e1a9f4a6c44510c9851574d3d115 ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-cad4683 [2019-10-22 08:58:16,389 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 08:58:16,391 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 08:58:16,403 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 08:58:16,404 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 08:58:16,405 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 08:58:16,406 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 08:58:16,408 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 08:58:16,410 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 08:58:16,412 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 08:58:16,413 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 08:58:16,414 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 08:58:16,414 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 08:58:16,415 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 08:58:16,416 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 08:58:16,417 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 08:58:16,417 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 08:58:16,426 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 08:58:16,427 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 08:58:16,429 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 08:58:16,433 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 08:58:16,434 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 08:58:16,435 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 08:58:16,435 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 08:58:16,437 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 08:58:16,437 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 08:58:16,438 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 08:58:16,441 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 08:58:16,442 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 08:58:16,442 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 08:58:16,443 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 08:58:16,443 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 08:58:16,444 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 08:58:16,444 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 08:58:16,445 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 08:58:16,445 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 08:58:16,446 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 08:58:16,448 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 08:58:16,448 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 08:58:16,449 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 08:58:16,449 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 08:58:16,450 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_0f21477f-2dc9-4f54-a6dc-0b619cbec6b4/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-22 08:58:16,474 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 08:58:16,474 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 08:58:16,475 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-22 08:58:16,475 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-22 08:58:16,475 INFO L138 SettingsManager]: * Use SBE=true [2019-10-22 08:58:16,476 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 08:58:16,476 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-22 08:58:16,476 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-22 08:58:16,476 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-22 08:58:16,476 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 08:58:16,476 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-22 08:58:16,477 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 08:58:16,477 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-22 08:58:16,477 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-22 08:58:16,477 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-22 08:58:16,477 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-22 08:58:16,477 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-22 08:58:16,478 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 08:58:16,478 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 08:58:16,478 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 08:58:16,478 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-22 08:58:16,478 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 08:58:16,479 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 08:58:16,479 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 08:58:16,479 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-22 08:58:16,479 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-22 08:58:16,479 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-22 08:58:16,479 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-22 08:58:16,479 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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 -> /tmp/vcloud-vcloud-master/worker/working_dir_0f21477f-2dc9-4f54-a6dc-0b619cbec6b4/bin/uautomizer 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(__VERIFIER_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 -> 041ac1710be6e1a9f4a6c44510c9851574d3d115 [2019-10-22 08:58:16,520 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 08:58:16,532 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 08:58:16,537 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 08:58:16,539 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 08:58:16,539 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 08:58:16,539 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_0f21477f-2dc9-4f54-a6dc-0b619cbec6b4/bin/uautomizer/../../sv-benchmarks/c/loop-invgen/nested9.i [2019-10-22 08:58:16,599 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_0f21477f-2dc9-4f54-a6dc-0b619cbec6b4/bin/uautomizer/data/c554e50df/c1bcaa97b9a94277908f5107896dd9ac/FLAGeb91e11ce [2019-10-22 08:58:17,023 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 08:58:17,024 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_0f21477f-2dc9-4f54-a6dc-0b619cbec6b4/sv-benchmarks/c/loop-invgen/nested9.i [2019-10-22 08:58:17,031 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_0f21477f-2dc9-4f54-a6dc-0b619cbec6b4/bin/uautomizer/data/c554e50df/c1bcaa97b9a94277908f5107896dd9ac/FLAGeb91e11ce [2019-10-22 08:58:17,396 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_0f21477f-2dc9-4f54-a6dc-0b619cbec6b4/bin/uautomizer/data/c554e50df/c1bcaa97b9a94277908f5107896dd9ac [2019-10-22 08:58:17,399 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 08:58:17,401 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 08:58:17,402 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 08:58:17,402 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 08:58:17,406 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 08:58:17,407 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 08:58:17" (1/1) ... [2019-10-22 08:58:17,410 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@146b7a38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:58:17, skipping insertion in model container [2019-10-22 08:58:17,410 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 08:58:17" (1/1) ... [2019-10-22 08:58:17,418 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 08:58:17,438 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 08:58:17,589 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 08:58:17,595 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 08:58:17,683 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 08:58:17,695 INFO L192 MainTranslator]: Completed translation [2019-10-22 08:58:17,696 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:58:17 WrapperNode [2019-10-22 08:58:17,696 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 08:58:17,697 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 08:58:17,697 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 08:58:17,697 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 08:58:17,706 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:58:17" (1/1) ... [2019-10-22 08:58:17,712 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:58:17" (1/1) ... [2019-10-22 08:58:17,733 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 08:58:17,733 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 08:58:17,733 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 08:58:17,733 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 08:58:17,743 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:58:17" (1/1) ... [2019-10-22 08:58:17,744 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:58:17" (1/1) ... [2019-10-22 08:58:17,744 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:58:17" (1/1) ... [2019-10-22 08:58:17,745 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:58:17" (1/1) ... [2019-10-22 08:58:17,747 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:58:17" (1/1) ... [2019-10-22 08:58:17,753 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:58:17" (1/1) ... [2019-10-22 08:58:17,756 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:58:17" (1/1) ... [2019-10-22 08:58:17,763 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 08:58:17,763 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 08:58:17,764 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 08:58:17,764 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 08:58:17,765 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:58:17" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0f21477f-2dc9-4f54-a6dc-0b619cbec6b4/bin/uautomizer/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 [2019-10-22 08:58:17,836 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 08:58:17,837 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 08:58:18,138 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 08:58:18,139 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-10-22 08:58:18,140 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 08:58:18 BoogieIcfgContainer [2019-10-22 08:58:18,140 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 08:58:18,141 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-22 08:58:18,141 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-22 08:58:18,144 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-22 08:58:18,144 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 08:58:17" (1/3) ... [2019-10-22 08:58:18,145 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46770dbe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 08:58:18, skipping insertion in model container [2019-10-22 08:58:18,145 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:58:17" (2/3) ... [2019-10-22 08:58:18,145 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46770dbe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 08:58:18, skipping insertion in model container [2019-10-22 08:58:18,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 08:58:18" (3/3) ... [2019-10-22 08:58:18,147 INFO L109 eAbstractionObserver]: Analyzing ICFG nested9.i [2019-10-22 08:58:18,156 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-22 08:58:18,162 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-22 08:58:18,173 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-22 08:58:18,194 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-22 08:58:18,194 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-22 08:58:18,195 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-22 08:58:18,195 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 08:58:18,195 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 08:58:18,195 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-22 08:58:18,195 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 08:58:18,195 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-22 08:58:18,208 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2019-10-22 08:58:18,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-22 08:58:18,213 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:58:18,214 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:58:18,216 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:58:18,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:58:18,222 INFO L82 PathProgramCache]: Analyzing trace with hash -331449283, now seen corresponding path program 1 times [2019-10-22 08:58:18,233 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:58:18,234 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621213285] [2019-10-22 08:58:18,234 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:58:18,234 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:58:18,234 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:58:18,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:58:18,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:58:18,459 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621213285] [2019-10-22 08:58:18,460 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:58:18,460 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-22 08:58:18,461 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929983318] [2019-10-22 08:58:18,466 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-22 08:58:18,466 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:58:18,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-22 08:58:18,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-22 08:58:18,486 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 6 states. [2019-10-22 08:58:18,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:58:18,686 INFO L93 Difference]: Finished difference Result 57 states and 88 transitions. [2019-10-22 08:58:18,687 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-22 08:58:18,688 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2019-10-22 08:58:18,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:58:18,697 INFO L225 Difference]: With dead ends: 57 [2019-10-22 08:58:18,698 INFO L226 Difference]: Without dead ends: 32 [2019-10-22 08:58:18,700 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2019-10-22 08:58:18,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-10-22 08:58:18,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 22. [2019-10-22 08:58:18,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-10-22 08:58:18,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2019-10-22 08:58:18,764 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 12 [2019-10-22 08:58:18,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:58:18,765 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2019-10-22 08:58:18,765 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-22 08:58:18,765 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2019-10-22 08:58:18,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-22 08:58:18,765 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:58:18,766 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:58:18,766 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:58:18,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:58:18,767 INFO L82 PathProgramCache]: Analyzing trace with hash -1296087111, now seen corresponding path program 1 times [2019-10-22 08:58:18,767 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:58:18,767 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999620808] [2019-10-22 08:58:18,767 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:58:18,768 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:58:18,768 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:58:18,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:58:18,887 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:58:18,887 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999620808] [2019-10-22 08:58:18,887 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032102729] [2019-10-22 08:58:18,888 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0f21477f-2dc9-4f54-a6dc-0b619cbec6b4/bin/uautomizer/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 [2019-10-22 08:58:18,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:58:18,925 INFO L256 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-22 08:58:18,931 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:58:19,003 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 08:58:19,024 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:58:19,024 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-22 08:58:19,025 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 10 [2019-10-22 08:58:19,025 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667199267] [2019-10-22 08:58:19,027 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-22 08:58:19,027 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:58:19,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-22 08:58:19,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-10-22 08:58:19,028 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 7 states. [2019-10-22 08:58:19,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:58:19,212 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2019-10-22 08:58:19,213 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-22 08:58:19,214 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2019-10-22 08:58:19,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:58:19,215 INFO L225 Difference]: With dead ends: 40 [2019-10-22 08:58:19,215 INFO L226 Difference]: Without dead ends: 38 [2019-10-22 08:58:19,216 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2019-10-22 08:58:19,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-10-22 08:58:19,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 24. [2019-10-22 08:58:19,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-22 08:58:19,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2019-10-22 08:58:19,231 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 15 [2019-10-22 08:58:19,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:58:19,232 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2019-10-22 08:58:19,232 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-22 08:58:19,232 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2019-10-22 08:58:19,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-22 08:58:19,232 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:58:19,233 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:58:19,433 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:58:19,434 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:58:19,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:58:19,434 INFO L82 PathProgramCache]: Analyzing trace with hash 29741143, now seen corresponding path program 1 times [2019-10-22 08:58:19,434 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:58:19,435 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555187079] [2019-10-22 08:58:19,435 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:58:19,435 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:58:19,435 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:58:19,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:58:19,556 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:58:19,556 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555187079] [2019-10-22 08:58:19,556 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027999170] [2019-10-22 08:58:19,556 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0f21477f-2dc9-4f54-a6dc-0b619cbec6b4/bin/uautomizer/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 [2019-10-22 08:58:19,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:58:19,585 INFO L256 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-22 08:58:19,586 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:58:19,663 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:58:19,663 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:58:19,664 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2019-10-22 08:58:19,664 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854884835] [2019-10-22 08:58:19,664 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-22 08:58:19,664 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:58:19,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-22 08:58:19,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2019-10-22 08:58:19,665 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand 13 states. [2019-10-22 08:58:20,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:58:20,332 INFO L93 Difference]: Finished difference Result 78 states and 104 transitions. [2019-10-22 08:58:20,334 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-10-22 08:58:20,334 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-10-22 08:58:20,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:58:20,335 INFO L225 Difference]: With dead ends: 78 [2019-10-22 08:58:20,335 INFO L226 Difference]: Without dead ends: 62 [2019-10-22 08:58:20,337 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=267, Invalid=855, Unknown=0, NotChecked=0, Total=1122 [2019-10-22 08:58:20,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-10-22 08:58:20,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 35. [2019-10-22 08:58:20,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-10-22 08:58:20,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2019-10-22 08:58:20,353 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 18 [2019-10-22 08:58:20,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:58:20,354 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2019-10-22 08:58:20,354 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-22 08:58:20,354 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2019-10-22 08:58:20,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-10-22 08:58:20,355 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:58:20,355 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:58:20,555 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:58:20,556 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:58:20,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:58:20,556 INFO L82 PathProgramCache]: Analyzing trace with hash 327524963, now seen corresponding path program 1 times [2019-10-22 08:58:20,556 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:58:20,556 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793508594] [2019-10-22 08:58:20,557 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:58:20,557 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:58:20,557 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:58:20,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:58:20,735 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-22 08:58:20,736 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793508594] [2019-10-22 08:58:20,736 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287108444] [2019-10-22 08:58:20,736 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0f21477f-2dc9-4f54-a6dc-0b619cbec6b4/bin/uautomizer/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 [2019-10-22 08:58:20,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:58:20,787 INFO L256 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-22 08:58:20,790 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:58:20,849 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-22 08:58:20,849 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-22 08:58:20,850 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [13] total 16 [2019-10-22 08:58:20,850 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924009619] [2019-10-22 08:58:20,850 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-22 08:58:20,850 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:58:20,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-22 08:58:20,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2019-10-22 08:58:20,851 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand 6 states. [2019-10-22 08:58:20,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:58:20,907 INFO L93 Difference]: Finished difference Result 61 states and 78 transitions. [2019-10-22 08:58:20,908 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-22 08:58:20,908 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2019-10-22 08:58:20,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:58:20,908 INFO L225 Difference]: With dead ends: 61 [2019-10-22 08:58:20,909 INFO L226 Difference]: Without dead ends: 40 [2019-10-22 08:58:20,909 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2019-10-22 08:58:20,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-10-22 08:58:20,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 36. [2019-10-22 08:58:20,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-10-22 08:58:20,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2019-10-22 08:58:20,916 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 27 [2019-10-22 08:58:20,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:58:20,916 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2019-10-22 08:58:20,916 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-22 08:58:20,916 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2019-10-22 08:58:20,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-10-22 08:58:20,917 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:58:20,917 INFO L380 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:58:21,118 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:58:21,118 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:58:21,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:58:21,119 INFO L82 PathProgramCache]: Analyzing trace with hash -116107245, now seen corresponding path program 2 times [2019-10-22 08:58:21,119 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:58:21,119 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764349806] [2019-10-22 08:58:21,119 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:58:21,119 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:58:21,119 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:58:21,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:58:21,217 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 7 proven. 29 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-22 08:58:21,217 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764349806] [2019-10-22 08:58:21,217 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691251575] [2019-10-22 08:58:21,218 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0f21477f-2dc9-4f54-a6dc-0b619cbec6b4/bin/uautomizer/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 [2019-10-22 08:58:21,250 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-10-22 08:58:21,251 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 08:58:21,251 INFO L256 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-22 08:58:21,252 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:58:21,273 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 08:58:21,298 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 26 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-22 08:58:21,298 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:58:21,298 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5] total 13 [2019-10-22 08:58:21,299 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197052843] [2019-10-22 08:58:21,299 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-22 08:58:21,299 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:58:21,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-22 08:58:21,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2019-10-22 08:58:21,300 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand 13 states. [2019-10-22 08:58:21,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:58:21,783 INFO L93 Difference]: Finished difference Result 77 states and 96 transitions. [2019-10-22 08:58:21,783 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-22 08:58:21,783 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 33 [2019-10-22 08:58:21,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:58:21,784 INFO L225 Difference]: With dead ends: 77 [2019-10-22 08:58:21,784 INFO L226 Difference]: Without dead ends: 0 [2019-10-22 08:58:21,785 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=557, Unknown=0, NotChecked=0, Total=812 [2019-10-22 08:58:21,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-10-22 08:58:21,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-10-22 08:58:21,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-10-22 08:58:21,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-10-22 08:58:21,786 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 33 [2019-10-22 08:58:21,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:58:21,786 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-10-22 08:58:21,786 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-22 08:58:21,786 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-10-22 08:58:21,786 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-10-22 08:58:21,987 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:58:21,992 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-10-22 08:58:22,339 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 34 [2019-10-22 08:58:22,608 WARN L191 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 42 [2019-10-22 08:58:22,610 INFO L443 ceAbstractionStarter]: For program point L19(line 19) no Hoare annotation was computed. [2019-10-22 08:58:22,610 INFO L443 ceAbstractionStarter]: For program point L19-1(line 19) no Hoare annotation was computed. [2019-10-22 08:58:22,610 INFO L443 ceAbstractionStarter]: For program point L-1(line -1) no Hoare annotation was computed. [2019-10-22 08:58:22,610 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-10-22 08:58:22,610 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-10-22 08:58:22,610 INFO L446 ceAbstractionStarter]: At program point L24(lines 11 26) the Hoare annotation is: true [2019-10-22 08:58:22,611 INFO L443 ceAbstractionStarter]: For program point L20-2(lines 20 23) no Hoare annotation was computed. [2019-10-22 08:58:22,611 INFO L439 ceAbstractionStarter]: At program point L20-3(lines 20 23) the Hoare annotation is: (let ((.cse0 (<= ULTIMATE.start_main_~i~0 ULTIMATE.start_main_~n~0))) (or (and (<= ULTIMATE.start_main_~i~0 0) (<= 0 ULTIMATE.start_main_~i~0)) (and (<= 2 ULTIMATE.start_main_~i~0) (= 1 ULTIMATE.start___VERIFIER_assert_~cond) .cse0) (and (<= 1 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 1) .cse0))) [2019-10-22 08:58:22,611 INFO L443 ceAbstractionStarter]: For program point L16(line 16) no Hoare annotation was computed. [2019-10-22 08:58:22,611 INFO L443 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2019-10-22 08:58:22,611 INFO L439 ceAbstractionStarter]: At program point L4-2(lines 1 26) the Hoare annotation is: (let ((.cse0 (* 3 ULTIMATE.start_main_~i~0))) (let ((.cse2 (<= 2 ULTIMATE.start_main_~i~0)) (.cse1 (* 2 ULTIMATE.start_main_~n~0)) (.cse3 (= 1 ULTIMATE.start___VERIFIER_assert_~cond)) (.cse4 (< ULTIMATE.start_main_~j~0 .cse0)) (.cse5 (<= (* 2 ULTIMATE.start_main_~i~0) ULTIMATE.start_main_~j~0)) (.cse6 (< ULTIMATE.start_main_~i~0 ULTIMATE.start_main_~n~0))) (or (and (<= (+ .cse0 5) (+ .cse1 ULTIMATE.start_main_~j~0)) .cse2 .cse3 .cse4 .cse5 .cse6) (and .cse2 .cse3 .cse4 (<= (+ (* 2 ULTIMATE.start_main_~j~0) 2) (+ .cse1 ULTIMATE.start_main_~i~0 ULTIMATE.start_main_~k~0)) .cse5 .cse6) (and (<= ULTIMATE.start_main_~k~0 (div ULTIMATE.start_main_~j~0 2)) .cse3 .cse4 (<= (div (- ULTIMATE.start_main_~j~0) (- 2)) ULTIMATE.start_main_~k~0) .cse5 .cse6)))) [2019-10-22 08:58:22,611 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-10-22 08:58:22,611 INFO L446 ceAbstractionStarter]: At program point L25(lines 11 26) the Hoare annotation is: true [2019-10-22 08:58:22,612 INFO L443 ceAbstractionStarter]: For program point L21-2(lines 21 23) no Hoare annotation was computed. [2019-10-22 08:58:22,612 INFO L439 ceAbstractionStarter]: At program point L21-3(lines 21 23) the Hoare annotation is: (let ((.cse0 (<= (* 2 ULTIMATE.start_main_~i~0) ULTIMATE.start_main_~j~0)) (.cse1 (< ULTIMATE.start_main_~i~0 ULTIMATE.start_main_~n~0))) (or (and (<= ULTIMATE.start_main_~i~0 1) (< ULTIMATE.start_main_~j~0 (* 3 ULTIMATE.start_main_~i~0)) .cse0 .cse1) (and (<= ULTIMATE.start_main_~i~0 0) .cse1 (<= 0 ULTIMATE.start_main_~i~0)) (and (<= 1 ULTIMATE.start_main_~i~0) (= 1 ULTIMATE.start___VERIFIER_assert_~cond) .cse0 .cse1))) [2019-10-22 08:58:22,612 INFO L443 ceAbstractionStarter]: For program point L17(line 17) no Hoare annotation was computed. [2019-10-22 08:58:22,612 INFO L443 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2019-10-22 08:58:22,612 INFO L439 ceAbstractionStarter]: At program point L22-2(lines 22 23) the Hoare annotation is: (let ((.cse8 (div (- ULTIMATE.start_main_~j~0) (- 2))) (.cse6 (* 3 ULTIMATE.start_main_~i~0))) (let ((.cse4 (* 2 ULTIMATE.start_main_~n~0)) (.cse0 (<= 2 ULTIMATE.start_main_~i~0)) (.cse1 (= 1 ULTIMATE.start___VERIFIER_assert_~cond)) (.cse3 (<= ULTIMATE.start_main_~k~0 ULTIMATE.start_main_~i~0)) (.cse5 (<= (* 2 ULTIMATE.start_main_~i~0) ULTIMATE.start_main_~j~0)) (.cse2 (< ULTIMATE.start_main_~j~0 .cse6)) (.cse9 (<= .cse8 ULTIMATE.start_main_~k~0)) (.cse7 (< ULTIMATE.start_main_~i~0 ULTIMATE.start_main_~n~0))) (or (and .cse0 .cse1 .cse2 (and .cse3 (<= (+ (* 2 ULTIMATE.start_main_~j~0) 2) (+ .cse4 ULTIMATE.start_main_~i~0 ULTIMATE.start_main_~k~0))) .cse5) (and (<= (+ .cse6 5) (+ .cse4 ULTIMATE.start_main_~j~0)) .cse0 .cse1 .cse2 .cse5 .cse7) (and (<= (+ .cse8 1) ULTIMATE.start_main_~k~0) .cse1 .cse2 .cse5 .cse7) (and .cse3 (<= ULTIMATE.start_main_~i~0 1) .cse2 .cse9 .cse5 .cse7) (and (<= ULTIMATE.start_main_~i~0 0) .cse2 .cse9 .cse7 (<= 0 ULTIMATE.start_main_~i~0))))) [2019-10-22 08:58:22,612 INFO L443 ceAbstractionStarter]: For program point L18(line 18) no Hoare annotation was computed. [2019-10-22 08:58:22,613 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2019-10-22 08:58:22,634 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 08:58:22 BoogieIcfgContainer [2019-10-22 08:58:22,634 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-22 08:58:22,634 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-10-22 08:58:22,634 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-10-22 08:58:22,635 INFO L275 PluginConnector]: Witness Printer initialized [2019-10-22 08:58:22,635 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 08:58:18" (3/4) ... [2019-10-22 08:58:22,639 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-10-22 08:58:22,649 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2019-10-22 08:58:22,649 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-10-22 08:58:22,699 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_0f21477f-2dc9-4f54-a6dc-0b619cbec6b4/bin/uautomizer/witness.graphml [2019-10-22 08:58:22,699 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-10-22 08:58:22,700 INFO L168 Benchmark]: Toolchain (without parser) took 5299.77 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 195.6 MB). Free memory was 950.1 MB in the beginning and 1.0 GB in the end (delta: -79.4 MB). Peak memory consumption was 116.1 MB. Max. memory is 11.5 GB. [2019-10-22 08:58:22,701 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 08:58:22,701 INFO L168 Benchmark]: CACSL2BoogieTranslator took 294.30 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 124.8 MB). Free memory was 950.1 MB in the beginning and 1.1 GB in the end (delta: -169.3 MB). Peak memory consumption was 23.3 MB. Max. memory is 11.5 GB. [2019-10-22 08:58:22,701 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.13 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 08:58:22,702 INFO L168 Benchmark]: Boogie Preprocessor took 29.94 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 11.5 GB. [2019-10-22 08:58:22,703 INFO L168 Benchmark]: RCFGBuilder took 376.49 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 23.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 11.5 GB. [2019-10-22 08:58:22,703 INFO L168 Benchmark]: TraceAbstraction took 4493.36 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 70.8 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 53.0 MB). Peak memory consumption was 123.7 MB. Max. memory is 11.5 GB. [2019-10-22 08:58:22,703 INFO L168 Benchmark]: Witness Printer took 64.70 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 11.5 GB. [2019-10-22 08:58:22,705 INFO L335 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 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 294.30 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 124.8 MB). Free memory was 950.1 MB in the beginning and 1.1 GB in the end (delta: -169.3 MB). Peak memory consumption was 23.3 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 36.13 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 29.94 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 376.49 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 23.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 11.5 GB. * TraceAbstraction took 4493.36 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 70.8 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 53.0 MB). Peak memory consumption was 123.7 MB. Max. memory is 11.5 GB. * Witness Printer took 64.70 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: 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: 20]: Loop Invariant Derived loop invariant: ((i <= 0 && 0 <= i) || ((2 <= i && 1 == cond) && i <= n)) || ((1 <= i && i <= 1) && i <= n) - InvariantResult [Line: 1]: Loop Invariant Derived loop invariant: ((((((3 * i + 5 <= 2 * n + j && 2 <= i) && 1 == cond) && j < 3 * i) && 2 * i <= j) && i < n) || (((((2 <= i && 1 == cond) && j < 3 * i) && 2 * j + 2 <= 2 * n + i + k) && 2 * i <= j) && i < n)) || (((((k <= j / 2 && 1 == cond) && j < 3 * i) && -j / -2 <= k) && 2 * i <= j) && i < n) - InvariantResult [Line: 21]: Loop Invariant Derived loop invariant: ((((i <= 1 && j < 3 * i) && 2 * i <= j) && i < n) || ((i <= 0 && i < n) && 0 <= i)) || (((1 <= i && 1 == cond) && 2 * i <= j) && i < n) - InvariantResult [Line: 11]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 11]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: (((((((2 <= i && 1 == cond) && j < 3 * i) && k <= i && 2 * j + 2 <= 2 * n + i + k) && 2 * i <= j) || (((((3 * i + 5 <= 2 * n + j && 2 <= i) && 1 == cond) && j < 3 * i) && 2 * i <= j) && i < n)) || ((((-j / -2 + 1 <= k && 1 == cond) && j < 3 * i) && 2 * i <= j) && i < n)) || (((((k <= i && i <= 1) && j < 3 * i) && -j / -2 <= k) && 2 * i <= j) && i < n)) || ((((i <= 0 && j < 3 * i) && -j / -2 <= k) && i < n) && 0 <= i) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 20 locations, 1 error locations. Result: SAFE, OverallTime: 4.4s, OverallIterations: 5, TraceHistogramMax: 4, AutomataDifference: 1.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.6s, HoareTripleCheckerStatistics: 70 SDtfs, 231 SDslu, 222 SDs, 0 SdLazy, 553 SolverSat, 106 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 177 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=36occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 55 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 6 LocationsWithAnnotation, 6 PreInvPairs, 40 NumberOfFragments, 302 HoareAnnotationTreeSize, 6 FomulaSimplifications, 2513 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 6 FomulaSimplificationsInter, 588 FormulaSimplificationTreeSizeReductionInter, 0.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 198 NumberOfCodeBlocks, 177 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 189 ConstructedInterpolants, 0 QuantifiedInterpolants, 17178 SizeOfPredicates, 17 NumberOfNonLiveVariables, 208 ConjunctsInSsa, 30 ConjunctsInUnsatCore, 9 InterpolantComputations, 3 PerfectInterpolantSequences, 76/134 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...