./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/n.c11_true-unreach-call_false-termination.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 635dfa2a Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_4ab8fa88-2d4a-4cd9-9e17-90d3fe34dcc7/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_4ab8fa88-2d4a-4cd9-9e17-90d3fe34dcc7/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_4ab8fa88-2d4a-4cd9-9e17-90d3fe34dcc7/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_4ab8fa88-2d4a-4cd9-9e17-90d3fe34dcc7/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops/n.c11_true-unreach-call_false-termination.i -s /tmp/vcloud-vcloud-master/worker/working_dir_4ab8fa88-2d4a-4cd9-9e17-90d3fe34dcc7/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_4ab8fa88-2d4a-4cd9-9e17-90d3fe34dcc7/bin-2019/utaipan --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 24b22c477e8a47eac290a2fc1c5b1e1aaa3a4fa4 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-635dfa2 [2018-12-03 07:22:29,370 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-03 07:22:29,371 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-03 07:22:29,377 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-03 07:22:29,377 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-03 07:22:29,377 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-03 07:22:29,378 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-03 07:22:29,379 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-03 07:22:29,379 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-03 07:22:29,380 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-03 07:22:29,380 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-03 07:22:29,380 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-03 07:22:29,381 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-03 07:22:29,381 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-03 07:22:29,382 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-03 07:22:29,382 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-03 07:22:29,383 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-03 07:22:29,383 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-03 07:22:29,384 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-03 07:22:29,385 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-03 07:22:29,385 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-03 07:22:29,386 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-03 07:22:29,387 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-03 07:22:29,387 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-03 07:22:29,387 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-03 07:22:29,388 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-03 07:22:29,388 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-03 07:22:29,388 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-03 07:22:29,389 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-03 07:22:29,389 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-03 07:22:29,389 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-03 07:22:29,390 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-03 07:22:29,390 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-03 07:22:29,390 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-03 07:22:29,390 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-03 07:22:29,391 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-03 07:22:29,391 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_4ab8fa88-2d4a-4cd9-9e17-90d3fe34dcc7/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-12-03 07:22:29,398 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-03 07:22:29,398 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-03 07:22:29,398 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-03 07:22:29,398 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-03 07:22:29,398 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-03 07:22:29,398 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-03 07:22:29,399 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-03 07:22:29,399 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-03 07:22:29,399 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-03 07:22:29,399 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-03 07:22:29,399 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-03 07:22:29,399 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-12-03 07:22:29,399 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-03 07:22:29,399 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-03 07:22:29,400 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-03 07:22:29,400 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-03 07:22:29,400 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-03 07:22:29,400 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-03 07:22:29,400 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-03 07:22:29,400 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-03 07:22:29,400 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-03 07:22:29,400 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-03 07:22:29,400 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-03 07:22:29,400 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-03 07:22:29,400 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-03 07:22:29,400 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-03 07:22:29,401 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-03 07:22:29,401 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-03 07:22:29,401 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-03 07:22:29,401 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-03 07:22:29,401 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-03 07:22:29,401 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-03 07:22:29,401 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-03 07:22:29,401 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-03 07:22:29,401 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-03 07:22:29,401 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-12-03 07:22:29,402 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_4ab8fa88-2d4a-4cd9-9e17-90d3fe34dcc7/bin-2019/utaipan 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 -> Taipan 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 -> 24b22c477e8a47eac290a2fc1c5b1e1aaa3a4fa4 [2018-12-03 07:22:29,418 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-03 07:22:29,424 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-03 07:22:29,426 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-03 07:22:29,427 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-03 07:22:29,427 INFO L276 PluginConnector]: CDTParser initialized [2018-12-03 07:22:29,428 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_4ab8fa88-2d4a-4cd9-9e17-90d3fe34dcc7/bin-2019/utaipan/../../sv-benchmarks/c/loops/n.c11_true-unreach-call_false-termination.i [2018-12-03 07:22:29,461 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_4ab8fa88-2d4a-4cd9-9e17-90d3fe34dcc7/bin-2019/utaipan/data/d4c387bec/b7faa9b773f74b91b9c4d8b766088088/FLAG94291f224 [2018-12-03 07:22:29,749 INFO L307 CDTParser]: Found 1 translation units. [2018-12-03 07:22:29,749 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_4ab8fa88-2d4a-4cd9-9e17-90d3fe34dcc7/sv-benchmarks/c/loops/n.c11_true-unreach-call_false-termination.i [2018-12-03 07:22:29,752 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_4ab8fa88-2d4a-4cd9-9e17-90d3fe34dcc7/bin-2019/utaipan/data/d4c387bec/b7faa9b773f74b91b9c4d8b766088088/FLAG94291f224 [2018-12-03 07:22:30,183 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_4ab8fa88-2d4a-4cd9-9e17-90d3fe34dcc7/bin-2019/utaipan/data/d4c387bec/b7faa9b773f74b91b9c4d8b766088088 [2018-12-03 07:22:30,184 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-03 07:22:30,185 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-03 07:22:30,186 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-03 07:22:30,186 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-03 07:22:30,188 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-03 07:22:30,189 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 07:22:30" (1/1) ... [2018-12-03 07:22:30,190 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43f5ef9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 07:22:30, skipping insertion in model container [2018-12-03 07:22:30,190 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 07:22:30" (1/1) ... [2018-12-03 07:22:30,196 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-03 07:22:30,206 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-03 07:22:30,297 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-03 07:22:30,299 INFO L191 MainTranslator]: Completed pre-run [2018-12-03 07:22:30,308 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-03 07:22:30,315 INFO L195 MainTranslator]: Completed translation [2018-12-03 07:22:30,315 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 07:22:30 WrapperNode [2018-12-03 07:22:30,315 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-03 07:22:30,316 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-03 07:22:30,316 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-03 07:22:30,316 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-03 07:22:30,321 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 07:22:30" (1/1) ... [2018-12-03 07:22:30,324 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 07:22:30" (1/1) ... [2018-12-03 07:22:30,327 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-03 07:22:30,327 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-03 07:22:30,327 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-03 07:22:30,328 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-03 07:22:30,333 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 07:22:30" (1/1) ... [2018-12-03 07:22:30,333 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 07:22:30" (1/1) ... [2018-12-03 07:22:30,333 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 07:22:30" (1/1) ... [2018-12-03 07:22:30,333 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 07:22:30" (1/1) ... [2018-12-03 07:22:30,335 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 07:22:30" (1/1) ... [2018-12-03 07:22:30,338 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 07:22:30" (1/1) ... [2018-12-03 07:22:30,339 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 07:22:30" (1/1) ... [2018-12-03 07:22:30,339 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-03 07:22:30,340 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-03 07:22:30,340 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-03 07:22:30,340 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-03 07:22:30,340 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 07:22:30" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4ab8fa88-2d4a-4cd9-9e17-90d3fe34dcc7/bin-2019/utaipan/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 [2018-12-03 07:22:30,400 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-03 07:22:30,401 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-03 07:22:30,401 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-03 07:22:30,401 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-03 07:22:30,401 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-03 07:22:30,401 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-03 07:22:30,401 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-12-03 07:22:30,401 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-12-03 07:22:30,483 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-03 07:22:30,484 INFO L280 CfgBuilder]: Removed 1 assue(true) statements. [2018-12-03 07:22:30,484 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 07:22:30 BoogieIcfgContainer [2018-12-03 07:22:30,484 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-03 07:22:30,484 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-03 07:22:30,484 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-03 07:22:30,486 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-03 07:22:30,487 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.12 07:22:30" (1/3) ... [2018-12-03 07:22:30,487 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fc8438 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 07:22:30, skipping insertion in model container [2018-12-03 07:22:30,487 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 07:22:30" (2/3) ... [2018-12-03 07:22:30,487 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fc8438 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 07:22:30, skipping insertion in model container [2018-12-03 07:22:30,487 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 07:22:30" (3/3) ... [2018-12-03 07:22:30,488 INFO L112 eAbstractionObserver]: Analyzing ICFG n.c11_true-unreach-call_false-termination.i [2018-12-03 07:22:30,495 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-03 07:22:30,500 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-03 07:22:30,510 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-03 07:22:30,528 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-03 07:22:30,528 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-03 07:22:30,529 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-03 07:22:30,529 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-03 07:22:30,529 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-03 07:22:30,529 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-03 07:22:30,529 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-03 07:22:30,529 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-03 07:22:30,539 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2018-12-03 07:22:30,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-12-03 07:22:30,542 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 07:22:30,542 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 07:22:30,543 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 07:22:30,546 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 07:22:30,547 INFO L82 PathProgramCache]: Analyzing trace with hash -147882559, now seen corresponding path program 1 times [2018-12-03 07:22:30,548 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 07:22:30,578 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 07:22:30,578 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 07:22:30,578 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 07:22:30,578 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 07:22:30,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 07:22:30,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 07:22:30,610 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 07:22:30,610 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-03 07:22:30,610 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-03 07:22:30,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-12-03 07:22:30,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-12-03 07:22:30,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-12-03 07:22:30,622 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2018-12-03 07:22:30,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 07:22:30,633 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2018-12-03 07:22:30,633 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-12-03 07:22:30,634 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2018-12-03 07:22:30,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 07:22:30,639 INFO L225 Difference]: With dead ends: 32 [2018-12-03 07:22:30,639 INFO L226 Difference]: Without dead ends: 13 [2018-12-03 07:22:30,641 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-12-03 07:22:30,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-12-03 07:22:30,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-12-03 07:22:30,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-12-03 07:22:30,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-12-03 07:22:30,661 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2018-12-03 07:22:30,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 07:22:30,661 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2018-12-03 07:22:30,661 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-12-03 07:22:30,661 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2018-12-03 07:22:30,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-12-03 07:22:30,662 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 07:22:30,662 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 07:22:30,662 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 07:22:30,662 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 07:22:30,662 INFO L82 PathProgramCache]: Analyzing trace with hash -158041290, now seen corresponding path program 1 times [2018-12-03 07:22:30,662 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 07:22:30,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 07:22:30,663 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 07:22:30,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 07:22:30,663 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 07:22:30,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 07:22:30,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 07:22:30,722 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 07:22:30,722 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-03 07:22:30,722 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-03 07:22:30,723 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-03 07:22:30,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-03 07:22:30,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-03 07:22:30,724 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 5 states. [2018-12-03 07:22:30,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 07:22:30,752 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2018-12-03 07:22:30,752 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-03 07:22:30,753 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2018-12-03 07:22:30,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 07:22:30,753 INFO L225 Difference]: With dead ends: 27 [2018-12-03 07:22:30,753 INFO L226 Difference]: Without dead ends: 16 [2018-12-03 07:22:30,754 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-12-03 07:22:30,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-12-03 07:22:30,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2018-12-03 07:22:30,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-12-03 07:22:30,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-12-03 07:22:30,757 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2018-12-03 07:22:30,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 07:22:30,757 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2018-12-03 07:22:30,758 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-03 07:22:30,758 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2018-12-03 07:22:30,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-12-03 07:22:30,758 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 07:22:30,758 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 07:22:30,758 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 07:22:30,759 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 07:22:30,759 INFO L82 PathProgramCache]: Analyzing trace with hash -1776138601, now seen corresponding path program 1 times [2018-12-03 07:22:30,759 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 07:22:30,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 07:22:30,759 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 07:22:30,760 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 07:22:30,760 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 07:22:30,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 07:22:30,818 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 07:22:30,818 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 07:22:30,819 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 07:22:30,819 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 14 with the following transitions: [2018-12-03 07:22:30,820 INFO L205 CegarAbsIntRunner]: [0], [4], [11], [13], [18], [20], [27], [30], [32], [38], [39], [40], [42] [2018-12-03 07:22:30,840 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-03 07:22:30,840 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-03 07:22:30,940 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-03 07:22:30,941 INFO L272 AbstractInterpreter]: Visited 13 different actions 37 times. Merged at 4 different actions 12 times. Widened at 1 different actions 1 times. Performed 90 root evaluator evaluations with a maximum evaluation depth of 5. Performed 90 inverse root evaluator evaluations with a maximum inverse evaluation depth of 5. Found 1 fixpoints after 1 different actions. Largest state had 5 variables. [2018-12-03 07:22:30,946 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 07:22:30,947 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-03 07:22:30,947 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 07:22:30,947 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4ab8fa88-2d4a-4cd9-9e17-90d3fe34dcc7/bin-2019/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 07:22:30,954 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 07:22:30,954 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 07:22:30,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 07:22:30,965 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 07:22:31,002 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 07:22:31,002 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 07:22:31,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 07:22:31,058 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 07:22:31,058 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2018-12-03 07:22:31,058 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 07:22:31,059 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-03 07:22:31,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-03 07:22:31,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2018-12-03 07:22:31,059 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 7 states. [2018-12-03 07:22:31,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 07:22:31,087 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2018-12-03 07:22:31,087 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-03 07:22:31,087 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2018-12-03 07:22:31,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 07:22:31,088 INFO L225 Difference]: With dead ends: 30 [2018-12-03 07:22:31,088 INFO L226 Difference]: Without dead ends: 19 [2018-12-03 07:22:31,088 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2018-12-03 07:22:31,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-12-03 07:22:31,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2018-12-03 07:22:31,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-12-03 07:22:31,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2018-12-03 07:22:31,090 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2018-12-03 07:22:31,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 07:22:31,091 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2018-12-03 07:22:31,091 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-03 07:22:31,091 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2018-12-03 07:22:31,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-12-03 07:22:31,091 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 07:22:31,091 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 07:22:31,091 INFO L423 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 07:22:31,091 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 07:22:31,091 INFO L82 PathProgramCache]: Analyzing trace with hash 199799702, now seen corresponding path program 2 times [2018-12-03 07:22:31,091 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 07:22:31,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 07:22:31,092 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 07:22:31,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 07:22:31,092 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 07:22:31,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 07:22:31,137 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 07:22:31,138 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 07:22:31,138 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 07:22:31,138 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 07:22:31,138 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 07:22:31,138 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 07:22:31,138 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4ab8fa88-2d4a-4cd9-9e17-90d3fe34dcc7/bin-2019/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 07:22:31,149 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 07:22:31,149 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 07:22:31,156 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-12-03 07:22:31,157 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 07:22:31,158 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 07:22:31,196 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 07:22:31,196 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 07:22:31,260 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 07:22:31,274 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 07:22:31,274 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 14 [2018-12-03 07:22:31,274 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 07:22:31,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-03 07:22:31,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-03 07:22:31,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2018-12-03 07:22:31,275 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 8 states. [2018-12-03 07:22:31,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 07:22:31,316 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2018-12-03 07:22:31,316 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-03 07:22:31,316 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2018-12-03 07:22:31,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 07:22:31,317 INFO L225 Difference]: With dead ends: 36 [2018-12-03 07:22:31,317 INFO L226 Difference]: Without dead ends: 22 [2018-12-03 07:22:31,317 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2018-12-03 07:22:31,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-12-03 07:22:31,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2018-12-03 07:22:31,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-12-03 07:22:31,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-12-03 07:22:31,319 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 16 [2018-12-03 07:22:31,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 07:22:31,319 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-12-03 07:22:31,320 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-03 07:22:31,320 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-12-03 07:22:31,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-12-03 07:22:31,320 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 07:22:31,320 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 07:22:31,320 INFO L423 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 07:22:31,320 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 07:22:31,320 INFO L82 PathProgramCache]: Analyzing trace with hash -1443974601, now seen corresponding path program 3 times [2018-12-03 07:22:31,320 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 07:22:31,321 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 07:22:31,321 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 07:22:31,321 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 07:22:31,321 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 07:22:31,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 07:22:31,375 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 07:22:31,375 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 07:22:31,375 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 07:22:31,375 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 07:22:31,375 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 07:22:31,375 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 07:22:31,375 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4ab8fa88-2d4a-4cd9-9e17-90d3fe34dcc7/bin-2019/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 07:22:31,383 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 07:22:31,383 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 07:22:31,390 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 07:22:31,390 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 07:22:31,391 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 07:22:31,423 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 07:22:31,423 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 07:22:31,477 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 07:22:31,491 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 07:22:31,491 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2018-12-03 07:22:31,491 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 07:22:31,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-03 07:22:31,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-03 07:22:31,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2018-12-03 07:22:31,492 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 9 states. [2018-12-03 07:22:31,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 07:22:31,535 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2018-12-03 07:22:31,535 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-03 07:22:31,535 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 19 [2018-12-03 07:22:31,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 07:22:31,536 INFO L225 Difference]: With dead ends: 42 [2018-12-03 07:22:31,536 INFO L226 Difference]: Without dead ends: 25 [2018-12-03 07:22:31,536 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2018-12-03 07:22:31,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-12-03 07:22:31,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2018-12-03 07:22:31,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-12-03 07:22:31,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2018-12-03 07:22:31,538 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 19 [2018-12-03 07:22:31,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 07:22:31,539 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2018-12-03 07:22:31,539 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-03 07:22:31,539 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2018-12-03 07:22:31,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-12-03 07:22:31,539 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 07:22:31,539 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 07:22:31,539 INFO L423 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 07:22:31,539 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 07:22:31,540 INFO L82 PathProgramCache]: Analyzing trace with hash 92873718, now seen corresponding path program 4 times [2018-12-03 07:22:31,540 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 07:22:31,540 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 07:22:31,540 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 07:22:31,540 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 07:22:31,540 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 07:22:31,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 07:22:31,611 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 07:22:31,611 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 07:22:31,611 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 07:22:31,611 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 07:22:31,612 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 07:22:31,612 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 07:22:31,612 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4ab8fa88-2d4a-4cd9-9e17-90d3fe34dcc7/bin-2019/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 07:22:31,617 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 07:22:31,617 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 07:22:31,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 07:22:31,625 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 07:22:31,644 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 07:22:31,644 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 07:22:31,713 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 07:22:31,727 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 07:22:31,728 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2018-12-03 07:22:31,728 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 07:22:31,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-03 07:22:31,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-03 07:22:31,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2018-12-03 07:22:31,728 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 10 states. [2018-12-03 07:22:31,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 07:22:31,770 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2018-12-03 07:22:31,771 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-03 07:22:31,771 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2018-12-03 07:22:31,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 07:22:31,771 INFO L225 Difference]: With dead ends: 39 [2018-12-03 07:22:31,771 INFO L226 Difference]: Without dead ends: 0 [2018-12-03 07:22:31,771 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2018-12-03 07:22:31,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-12-03 07:22:31,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-12-03 07:22:31,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-12-03 07:22:31,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-12-03 07:22:31,772 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 22 [2018-12-03 07:22:31,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 07:22:31,772 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-03 07:22:31,772 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-03 07:22:31,772 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-12-03 07:22:31,772 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-03 07:22:31,775 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-12-03 07:22:31,850 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-12-03 07:22:31,850 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-12-03 07:22:31,850 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-12-03 07:22:31,850 INFO L451 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-12-03 07:22:31,850 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-12-03 07:22:31,850 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-12-03 07:22:31,850 INFO L451 ceAbstractionStarter]: At program point mainENTRY(lines 9 21) the Hoare annotation is: true [2018-12-03 07:22:31,851 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 9 21) no Hoare annotation was computed. [2018-12-03 07:22:31,851 INFO L448 ceAbstractionStarter]: For program point L19(line 19) no Hoare annotation was computed. [2018-12-03 07:22:31,851 INFO L448 ceAbstractionStarter]: For program point L14(lines 14 15) no Hoare annotation was computed. [2018-12-03 07:22:31,851 INFO L448 ceAbstractionStarter]: For program point mainFINAL(lines 9 21) no Hoare annotation was computed. [2018-12-03 07:22:31,851 INFO L448 ceAbstractionStarter]: For program point L14-2(lines 14 15) no Hoare annotation was computed. [2018-12-03 07:22:31,851 INFO L444 ceAbstractionStarter]: At program point L13-2(lines 13 18) the Hoare annotation is: (or (and (<= main_~len~0 0) (< 0 (+ (div main_~len~0 4294967296) 1))) (and (<= 4 main_~len~0) (<= main_~len~0 4)) (and (<= main_~len~0 2) (<= 2 main_~len~0)) (and (<= 1 main_~len~0) (<= main_~len~0 1)) (and (<= main_~len~0 3) (<= 3 main_~len~0))) [2018-12-03 07:22:31,851 INFO L444 ceAbstractionStarter]: At program point L13-3(lines 13 18) the Hoare annotation is: (or (and (<= main_~len~0 0) (< 0 (+ (div main_~len~0 4294967296) 1))) (and (<= 4 main_~len~0) (<= main_~len~0 4)) (and (<= main_~len~0 2) (<= 2 main_~len~0)) (and (<= 1 main_~len~0) (<= main_~len~0 1)) (and (<= main_~len~0 3) (<= 3 main_~len~0))) [2018-12-03 07:22:31,851 INFO L448 ceAbstractionStarter]: For program point L3-2(lines 2 7) no Hoare annotation was computed. [2018-12-03 07:22:31,851 INFO L451 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 2 7) the Hoare annotation is: true [2018-12-03 07:22:31,851 INFO L448 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 4) no Hoare annotation was computed. [2018-12-03 07:22:31,851 INFO L448 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 2 7) no Hoare annotation was computed. [2018-12-03 07:22:31,851 INFO L448 ceAbstractionStarter]: For program point L4(line 4) no Hoare annotation was computed. [2018-12-03 07:22:31,852 INFO L448 ceAbstractionStarter]: For program point L3(lines 3 5) no Hoare annotation was computed. [2018-12-03 07:22:31,859 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.12 07:22:31 BoogieIcfgContainer [2018-12-03 07:22:31,859 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-03 07:22:31,859 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-03 07:22:31,859 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-03 07:22:31,859 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-03 07:22:31,860 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 07:22:30" (3/4) ... [2018-12-03 07:22:31,862 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-12-03 07:22:31,865 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-12-03 07:22:31,865 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-12-03 07:22:31,865 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2018-12-03 07:22:31,867 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2018-12-03 07:22:31,867 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2018-12-03 07:22:31,867 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-12-03 07:22:31,892 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_4ab8fa88-2d4a-4cd9-9e17-90d3fe34dcc7/bin-2019/utaipan/witness.graphml [2018-12-03 07:22:31,893 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-03 07:22:31,893 INFO L168 Benchmark]: Toolchain (without parser) took 1708.33 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 89.1 MB). Free memory was 949.7 MB in the beginning and 838.0 MB in the end (delta: 111.7 MB). Peak memory consumption was 200.8 MB. Max. memory is 11.5 GB. [2018-12-03 07:22:31,894 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 1.0 GB. Free memory is still 976.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-03 07:22:31,894 INFO L168 Benchmark]: CACSL2BoogieTranslator took 129.73 ms. Allocated memory is still 1.0 GB. Free memory was 949.7 MB in the beginning and 938.9 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 11.5 GB. [2018-12-03 07:22:31,894 INFO L168 Benchmark]: Boogie Procedure Inliner took 11.33 ms. Allocated memory is still 1.0 GB. Free memory is still 938.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-03 07:22:31,895 INFO L168 Benchmark]: Boogie Preprocessor took 11.99 ms. Allocated memory is still 1.0 GB. Free memory was 938.9 MB in the beginning and 936.2 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-12-03 07:22:31,895 INFO L168 Benchmark]: RCFGBuilder took 144.48 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 89.1 MB). Free memory was 936.2 MB in the beginning and 1.1 GB in the end (delta: -133.9 MB). Peak memory consumption was 12.8 MB. Max. memory is 11.5 GB. [2018-12-03 07:22:31,895 INFO L168 Benchmark]: TraceAbstraction took 1374.64 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 840.7 MB in the end (delta: 229.4 MB). Peak memory consumption was 229.4 MB. Max. memory is 11.5 GB. [2018-12-03 07:22:31,895 INFO L168 Benchmark]: Witness Printer took 33.43 ms. Allocated memory is still 1.1 GB. Free memory was 840.7 MB in the beginning and 838.0 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-12-03 07:22:31,897 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 1.0 GB. Free memory is still 976.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 129.73 ms. Allocated memory is still 1.0 GB. Free memory was 949.7 MB in the beginning and 938.9 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 11.33 ms. Allocated memory is still 1.0 GB. Free memory is still 938.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 11.99 ms. Allocated memory is still 1.0 GB. Free memory was 938.9 MB in the beginning and 936.2 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 144.48 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 89.1 MB). Free memory was 936.2 MB in the beginning and 1.1 GB in the end (delta: -133.9 MB). Peak memory consumption was 12.8 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1374.64 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 840.7 MB in the end (delta: 229.4 MB). Peak memory consumption was 229.4 MB. Max. memory is 11.5 GB. * Witness Printer took 33.43 ms. Allocated memory is still 1.1 GB. Free memory was 840.7 MB in the beginning and 838.0 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 4]: 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: 13]: Loop Invariant Derived loop invariant: ((((len <= 0 && 0 < len / 4294967296 + 1) || (4 <= len && len <= 4)) || (len <= 2 && 2 <= len)) || (1 <= len && len <= 1)) || (len <= 3 && 3 <= len) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. SAFE Result, 1.3s OverallTime, 6 OverallIterations, 4 TraceHistogramMax, 0.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 83 SDtfs, 37 SDslu, 243 SDs, 0 SdLazy, 217 SolverSat, 22 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 178 GetRequests, 112 SyntacticMatches, 9 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.1s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 4 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 17 PreInvPairs, 27 NumberOfFragments, 85 HoareAnnotationTreeSize, 17 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 3 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 160 NumberOfCodeBlocks, 160 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 216 ConstructedInterpolants, 0 QuantifiedInterpolants, 17604 SizeOfPredicates, 8 NumberOfNonLiveVariables, 142 ConjunctsInSsa, 53 ConjunctsInUnsatCore, 14 InterpolantComputations, 2 PerfectInterpolantSequences, 2/120 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...