./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/array-examples/standard_sentinel_true-unreach-call_true-termination.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 1dbac8bc Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_3591e1e5-34ff-48f0-ae6e-2f9caeb3ee98/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_3591e1e5-34ff-48f0-ae6e-2f9caeb3ee98/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_3591e1e5-34ff-48f0-ae6e-2f9caeb3ee98/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_3591e1e5-34ff-48f0-ae6e-2f9caeb3ee98/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_sentinel_true-unreach-call_true-termination.i -s /tmp/vcloud-vcloud-master/worker/working_dir_3591e1e5-34ff-48f0-ae6e-2f9caeb3ee98/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_3591e1e5-34ff-48f0-ae6e-2f9caeb3ee98/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 b4fbc36a28ccee76a98a185e0c5cc58738af3c30 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-1dbac8b [2018-10-26 23:05:23,172 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-26 23:05:23,173 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-26 23:05:23,183 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-26 23:05:23,183 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-26 23:05:23,184 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-26 23:05:23,185 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-26 23:05:23,186 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-26 23:05:23,188 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-26 23:05:23,188 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-26 23:05:23,189 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-26 23:05:23,189 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-26 23:05:23,190 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-26 23:05:23,191 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-26 23:05:23,192 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-26 23:05:23,192 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-26 23:05:23,193 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-26 23:05:23,194 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-26 23:05:23,196 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-26 23:05:23,197 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-26 23:05:23,198 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-26 23:05:23,199 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-26 23:05:23,201 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-26 23:05:23,201 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-26 23:05:23,202 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-26 23:05:23,202 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-26 23:05:23,204 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-26 23:05:23,204 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-26 23:05:23,205 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-26 23:05:23,206 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-26 23:05:23,206 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-26 23:05:23,206 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-26 23:05:23,206 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-26 23:05:23,207 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-26 23:05:23,208 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-26 23:05:23,208 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-26 23:05:23,209 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_3591e1e5-34ff-48f0-ae6e-2f9caeb3ee98/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-10-26 23:05:23,220 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-26 23:05:23,220 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-26 23:05:23,221 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-26 23:05:23,221 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-26 23:05:23,221 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-26 23:05:23,221 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-26 23:05:23,221 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-26 23:05:23,221 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-26 23:05:23,222 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-26 23:05:23,222 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-26 23:05:23,222 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-26 23:05:23,222 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-26 23:05:23,224 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-26 23:05:23,224 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-26 23:05:23,224 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-26 23:05:23,224 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-26 23:05:23,224 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-26 23:05:23,224 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-26 23:05:23,224 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-26 23:05:23,225 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-26 23:05:23,225 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-26 23:05:23,225 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-26 23:05:23,225 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-26 23:05:23,225 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-26 23:05:23,225 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-26 23:05:23,225 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-26 23:05:23,226 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-26 23:05:23,226 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-26 23:05:23,226 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-26 23:05:23,226 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-26 23:05:23,226 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-26 23:05:23,226 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-26 23:05:23,226 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-26 23:05:23,227 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-26 23:05:23,227 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_3591e1e5-34ff-48f0-ae6e-2f9caeb3ee98/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 -> b4fbc36a28ccee76a98a185e0c5cc58738af3c30 [2018-10-26 23:05:23,261 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-26 23:05:23,270 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-26 23:05:23,276 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-26 23:05:23,277 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-26 23:05:23,278 INFO L276 PluginConnector]: CDTParser initialized [2018-10-26 23:05:23,278 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_3591e1e5-34ff-48f0-ae6e-2f9caeb3ee98/bin-2019/utaipan/../../sv-benchmarks/c/array-examples/standard_sentinel_true-unreach-call_true-termination.i [2018-10-26 23:05:23,329 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_3591e1e5-34ff-48f0-ae6e-2f9caeb3ee98/bin-2019/utaipan/data/9cf7f831b/570b4692b205482cade1536ef3e061a6/FLAG5e293f85f [2018-10-26 23:05:23,700 INFO L298 CDTParser]: Found 1 translation units. [2018-10-26 23:05:23,701 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_3591e1e5-34ff-48f0-ae6e-2f9caeb3ee98/sv-benchmarks/c/array-examples/standard_sentinel_true-unreach-call_true-termination.i [2018-10-26 23:05:23,706 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_3591e1e5-34ff-48f0-ae6e-2f9caeb3ee98/bin-2019/utaipan/data/9cf7f831b/570b4692b205482cade1536ef3e061a6/FLAG5e293f85f [2018-10-26 23:05:23,721 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_3591e1e5-34ff-48f0-ae6e-2f9caeb3ee98/bin-2019/utaipan/data/9cf7f831b/570b4692b205482cade1536ef3e061a6 [2018-10-26 23:05:23,724 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-26 23:05:23,725 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-10-26 23:05:23,726 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-26 23:05:23,726 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-26 23:05:23,728 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-26 23:05:23,729 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 11:05:23" (1/1) ... [2018-10-26 23:05:23,731 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@378ff548 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:05:23, skipping insertion in model container [2018-10-26 23:05:23,732 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 11:05:23" (1/1) ... [2018-10-26 23:05:23,744 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-26 23:05:23,759 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-26 23:05:23,900 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 23:05:23,904 INFO L189 MainTranslator]: Completed pre-run [2018-10-26 23:05:23,920 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 23:05:23,936 INFO L193 MainTranslator]: Completed translation [2018-10-26 23:05:23,937 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:05:23 WrapperNode [2018-10-26 23:05:23,937 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-26 23:05:23,938 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-26 23:05:23,938 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-26 23:05:23,938 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-26 23:05:23,944 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:05:23" (1/1) ... [2018-10-26 23:05:23,952 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:05:23" (1/1) ... [2018-10-26 23:05:23,968 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-26 23:05:23,969 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-26 23:05:23,969 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-26 23:05:23,969 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-26 23:05:23,977 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:05:23" (1/1) ... [2018-10-26 23:05:23,977 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:05:23" (1/1) ... [2018-10-26 23:05:23,978 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:05:23" (1/1) ... [2018-10-26 23:05:23,979 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:05:23" (1/1) ... [2018-10-26 23:05:23,982 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:05:23" (1/1) ... [2018-10-26 23:05:23,986 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:05:23" (1/1) ... [2018-10-26 23:05:23,988 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:05:23" (1/1) ... [2018-10-26 23:05:23,989 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-26 23:05:23,989 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-26 23:05:23,989 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-26 23:05:23,990 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-26 23:05:23,990 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:05:23" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3591e1e5-34ff-48f0-ae6e-2f9caeb3ee98/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 [2018-10-26 23:05:24,104 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-26 23:05:24,105 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-26 23:05:24,105 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-26 23:05:24,106 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-26 23:05:24,106 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-26 23:05:24,106 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-26 23:05:24,106 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-10-26 23:05:24,106 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-10-26 23:05:24,534 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-26 23:05:24,534 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 11:05:24 BoogieIcfgContainer [2018-10-26 23:05:24,534 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-26 23:05:24,535 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-26 23:05:24,535 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-26 23:05:24,537 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-26 23:05:24,538 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 11:05:23" (1/3) ... [2018-10-26 23:05:24,538 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72cc6495 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 11:05:24, skipping insertion in model container [2018-10-26 23:05:24,538 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:05:23" (2/3) ... [2018-10-26 23:05:24,539 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72cc6495 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 11:05:24, skipping insertion in model container [2018-10-26 23:05:24,539 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 11:05:24" (3/3) ... [2018-10-26 23:05:24,540 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_sentinel_true-unreach-call_true-termination.i [2018-10-26 23:05:24,548 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-26 23:05:24,554 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-26 23:05:24,567 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-26 23:05:24,593 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-26 23:05:24,593 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-26 23:05:24,593 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-26 23:05:24,593 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-26 23:05:24,594 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-26 23:05:24,594 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-26 23:05:24,594 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-26 23:05:24,594 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-26 23:05:24,609 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2018-10-26 23:05:24,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-26 23:05:24,618 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 23:05:24,618 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 23:05:24,620 INFO L424 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 23:05:24,625 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:05:24,625 INFO L82 PathProgramCache]: Analyzing trace with hash -136856004, now seen corresponding path program 1 times [2018-10-26 23:05:24,628 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-26 23:05:24,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:05:24,666 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 23:05:24,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:05:24,666 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-26 23:05:24,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:05:24,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 23:05:24,773 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 23:05:24,773 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-26 23:05:24,773 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-26 23:05:24,776 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-26 23:05:24,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-26 23:05:24,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-26 23:05:24,790 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 2 states. [2018-10-26 23:05:24,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 23:05:24,813 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2018-10-26 23:05:24,813 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-26 23:05:24,815 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2018-10-26 23:05:24,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 23:05:24,824 INFO L225 Difference]: With dead ends: 34 [2018-10-26 23:05:24,826 INFO L226 Difference]: Without dead ends: 15 [2018-10-26 23:05:24,830 INFO L605 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 [2018-10-26 23:05:24,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-26 23:05:24,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-10-26 23:05:24,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-26 23:05:24,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-10-26 23:05:24,868 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2018-10-26 23:05:24,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 23:05:24,868 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-10-26 23:05:24,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-26 23:05:24,869 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-10-26 23:05:24,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-26 23:05:24,869 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 23:05:24,869 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 23:05:24,870 INFO L424 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 23:05:24,870 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:05:24,870 INFO L82 PathProgramCache]: Analyzing trace with hash 1358164726, now seen corresponding path program 1 times [2018-10-26 23:05:24,870 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-26 23:05:24,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:05:24,872 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 23:05:24,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:05:24,872 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-26 23:05:24,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:05:25,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 23:05:25,033 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 23:05:25,033 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-26 23:05:25,033 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-26 23:05:25,034 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-26 23:05:25,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-26 23:05:25,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-26 23:05:25,035 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 5 states. [2018-10-26 23:05:25,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 23:05:25,097 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-10-26 23:05:25,097 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-26 23:05:25,097 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2018-10-26 23:05:25,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 23:05:25,098 INFO L225 Difference]: With dead ends: 23 [2018-10-26 23:05:25,098 INFO L226 Difference]: Without dead ends: 18 [2018-10-26 23:05:25,099 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-10-26 23:05:25,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-26 23:05:25,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-10-26 23:05:25,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-26 23:05:25,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-10-26 23:05:25,103 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 14 [2018-10-26 23:05:25,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 23:05:25,103 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-10-26 23:05:25,103 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-26 23:05:25,104 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-10-26 23:05:25,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-26 23:05:25,104 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 23:05:25,104 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 23:05:25,104 INFO L424 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 23:05:25,104 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:05:25,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1389199971, now seen corresponding path program 1 times [2018-10-26 23:05:25,105 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-26 23:05:25,105 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:05:25,106 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 23:05:25,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:05:25,106 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-26 23:05:25,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:05:25,378 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 21 [2018-10-26 23:05:25,610 WARN L179 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 17 [2018-10-26 23:05:25,790 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 23:05:25,791 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 23:05:25,791 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-26 23:05:25,792 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 18 with the following transitions: [2018-10-26 23:05:25,793 INFO L202 CegarAbsIntRunner]: [0], [1], [5], [8], [12], [14], [17], [19], [29], [32], [34], [40], [41], [42], [44] [2018-10-26 23:05:25,831 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-26 23:05:25,831 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-26 23:05:27,968 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-26 23:05:27,970 INFO L272 AbstractInterpreter]: Visited 15 different actions 446 times. Merged at 4 different actions 216 times. Widened at 1 different actions 50 times. Found 1 fixpoints after 1 different actions. Largest state had 32 variables. [2018-10-26 23:05:27,983 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:05:27,984 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-26 23:05:27,984 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 23:05:27,984 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3591e1e5-34ff-48f0-ae6e-2f9caeb3ee98/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 [2018-10-26 23:05:27,991 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 23:05:27,991 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-26 23:05:28,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:05:28,049 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 23:05:28,099 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 12 [2018-10-26 23:05:28,107 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2018-10-26 23:05:28,108 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-26 23:05:28,110 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-26 23:05:28,143 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-26 23:05:28,144 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:22, output treesize:18 [2018-10-26 23:05:28,197 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2018-10-26 23:05:28,226 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 16 [2018-10-26 23:05:28,227 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2018-10-26 23:05:28,233 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2018-10-26 23:05:28,252 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2018-10-26 23:05:28,253 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:29, output treesize:30 [2018-10-26 23:05:28,410 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 23:05:28,410 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-26 23:05:28,689 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 23:05:28,710 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-26 23:05:28,710 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 16 [2018-10-26 23:05:28,710 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-26 23:05:28,711 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-26 23:05:28,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-26 23:05:28,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2018-10-26 23:05:28,714 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 12 states. [2018-10-26 23:05:29,060 WARN L179 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 22 [2018-10-26 23:05:29,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 23:05:29,170 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-10-26 23:05:29,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-26 23:05:29,171 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 17 [2018-10-26 23:05:29,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 23:05:29,171 INFO L225 Difference]: With dead ends: 26 [2018-10-26 23:05:29,172 INFO L226 Difference]: Without dead ends: 21 [2018-10-26 23:05:29,172 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2018-10-26 23:05:29,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-26 23:05:29,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-10-26 23:05:29,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-26 23:05:29,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-10-26 23:05:29,175 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 17 [2018-10-26 23:05:29,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 23:05:29,175 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-10-26 23:05:29,175 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-26 23:05:29,175 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-10-26 23:05:29,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-26 23:05:29,176 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 23:05:29,176 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 23:05:29,176 INFO L424 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 23:05:29,177 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:05:29,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1060871574, now seen corresponding path program 2 times [2018-10-26 23:05:29,177 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-26 23:05:29,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:05:29,178 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 23:05:29,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:05:29,178 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-26 23:05:29,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:05:29,533 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 28 [2018-10-26 23:05:29,676 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 23:05:29,676 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 23:05:29,676 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-26 23:05:29,677 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-26 23:05:29,677 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-26 23:05:29,677 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 23:05:29,677 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3591e1e5-34ff-48f0-ae6e-2f9caeb3ee98/bin-2019/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-10-26 23:05:29,695 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 23:05:29,695 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 23:05:29,743 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-10-26 23:05:29,743 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 23:05:29,746 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 23:05:29,752 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 12 [2018-10-26 23:05:29,755 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2018-10-26 23:05:29,755 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-26 23:05:29,760 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-26 23:05:29,764 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-26 23:05:29,765 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:22, output treesize:18 [2018-10-26 23:05:29,844 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2018-10-26 23:05:29,858 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 41 [2018-10-26 23:05:29,860 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2018-10-26 23:05:29,875 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2018-10-26 23:05:29,889 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2018-10-26 23:05:29,890 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:37, output treesize:58 [2018-10-26 23:05:29,980 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 23:05:29,980 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-26 23:05:30,188 WARN L307 Elim1Store]: Array PQE input equivalent to true [2018-10-26 23:05:30,188 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-10-26 23:05:30,189 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-26 23:05:30,189 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:1 [2018-10-26 23:05:30,192 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 23:05:30,213 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-26 23:05:30,213 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 22 [2018-10-26 23:05:30,214 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-26 23:05:30,214 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-26 23:05:30,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-26 23:05:30,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2018-10-26 23:05:30,215 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 16 states. [2018-10-26 23:05:30,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 23:05:30,572 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2018-10-26 23:05:30,572 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-26 23:05:30,573 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2018-10-26 23:05:30,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 23:05:30,574 INFO L225 Difference]: With dead ends: 33 [2018-10-26 23:05:30,574 INFO L226 Difference]: Without dead ends: 27 [2018-10-26 23:05:30,574 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=143, Invalid=613, Unknown=0, NotChecked=0, Total=756 [2018-10-26 23:05:30,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-26 23:05:30,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-10-26 23:05:30,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-26 23:05:30,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-10-26 23:05:30,579 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 20 [2018-10-26 23:05:30,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 23:05:30,579 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-10-26 23:05:30,579 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-26 23:05:30,580 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-10-26 23:05:30,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-26 23:05:30,580 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 23:05:30,580 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 23:05:30,581 INFO L424 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 23:05:30,581 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:05:30,581 INFO L82 PathProgramCache]: Analyzing trace with hash 260100150, now seen corresponding path program 3 times [2018-10-26 23:05:30,581 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-26 23:05:30,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:05:30,582 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 23:05:30,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:05:30,582 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-26 23:05:30,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:05:31,311 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 23:05:31,311 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 23:05:31,311 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-26 23:05:31,311 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-26 23:05:31,311 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-26 23:05:31,312 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 23:05:31,312 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3591e1e5-34ff-48f0-ae6e-2f9caeb3ee98/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 [2018-10-26 23:05:31,319 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-26 23:05:31,319 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-10-26 23:05:31,345 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-26 23:05:31,345 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 23:05:31,348 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 23:05:31,355 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 12 [2018-10-26 23:05:31,358 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2018-10-26 23:05:31,358 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-26 23:05:31,360 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-26 23:05:31,366 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-26 23:05:31,366 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2018-10-26 23:05:31,671 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2018-10-26 23:05:31,716 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 37 treesize of output 113 [2018-10-26 23:05:31,716 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2018-10-26 23:05:31,759 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 72 xjuncts. [2018-10-26 23:05:32,225 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2018-10-26 23:05:32,256 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2018-10-26 23:05:32,257 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:63, output treesize:239 [2018-10-26 23:05:32,584 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 23:05:32,584 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-26 23:05:32,869 WARN L307 Elim1Store]: Array PQE input equivalent to true [2018-10-26 23:05:32,870 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-10-26 23:05:32,870 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-26 23:05:32,871 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:91, output treesize:1 [2018-10-26 23:05:32,876 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 23:05:32,897 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-26 23:05:32,897 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 13] total 33 [2018-10-26 23:05:32,897 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-26 23:05:32,897 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-26 23:05:32,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-26 23:05:32,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=828, Unknown=0, NotChecked=0, Total=1056 [2018-10-26 23:05:32,898 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 23 states. [2018-10-26 23:05:33,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 23:05:33,330 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2018-10-26 23:05:33,331 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-26 23:05:33,331 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2018-10-26 23:05:33,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 23:05:33,331 INFO L225 Difference]: With dead ends: 31 [2018-10-26 23:05:33,331 INFO L226 Difference]: Without dead ends: 0 [2018-10-26 23:05:33,332 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=345, Invalid=1137, Unknown=0, NotChecked=0, Total=1482 [2018-10-26 23:05:33,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-10-26 23:05:33,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-10-26 23:05:33,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-10-26 23:05:33,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-10-26 23:05:33,333 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 26 [2018-10-26 23:05:33,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 23:05:33,333 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-10-26 23:05:33,334 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-26 23:05:33,334 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-10-26 23:05:33,334 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-10-26 23:05:33,337 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-10-26 23:05:33,464 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2018-10-26 23:05:33,465 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2018-10-26 23:05:33,465 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-10-26 23:05:33,465 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-10-26 23:05:33,465 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-10-26 23:05:33,465 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-10-26 23:05:33,465 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-10-26 23:05:33,465 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 4 17) the Hoare annotation is: true [2018-10-26 23:05:33,465 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 4 17) no Hoare annotation was computed. [2018-10-26 23:05:33,465 INFO L425 ceAbstractionStarter]: For program point mainFINAL(lines 4 17) no Hoare annotation was computed. [2018-10-26 23:05:33,466 INFO L425 ceAbstractionStarter]: For program point L11-1(lines 11 13) no Hoare annotation was computed. [2018-10-26 23:05:33,466 INFO L425 ceAbstractionStarter]: For program point L11-2(lines 11 13) no Hoare annotation was computed. [2018-10-26 23:05:33,466 INFO L425 ceAbstractionStarter]: For program point L8(lines 8 15) no Hoare annotation was computed. [2018-10-26 23:05:33,466 INFO L421 ceAbstractionStarter]: At program point L11-4(lines 11 13) the Hoare annotation is: (let ((.cse4 (* 4 main_~pos~0))) (let ((.cse2 (+ .cse4 |main_~#a~0.offset|)) (.cse0 (<= 0 main_~pos~0)) (.cse1 (select |#memory_int| |main_~#a~0.base|)) (.cse3 (= |main_~#a~0.offset| 0))) (or (and .cse0 (= (select .cse1 .cse2) main_~marker~0) (= main_~i~0 0) .cse3) (and (not (= .cse2 0)) .cse0 (= main_~marker~0 (select .cse1 (+ |main_~#a~0.offset| .cse4))) (< main_~i~0 (+ main_~pos~0 1)) .cse3)))) [2018-10-26 23:05:33,466 INFO L425 ceAbstractionStarter]: For program point L8-1(lines 8 15) no Hoare annotation was computed. [2018-10-26 23:05:33,466 INFO L421 ceAbstractionStarter]: At program point L11-5(lines 11 13) the Hoare annotation is: (let ((.cse0 (<= 0 main_~pos~0))) (or (and .cse0 (= main_~i~0 0)) (and (<= main_~i~0 main_~pos~0) (not (= (+ (* 4 main_~pos~0) |main_~#a~0.offset|) 0)) .cse0 (= |main_~#a~0.offset| 0)))) [2018-10-26 23:05:33,466 INFO L425 ceAbstractionStarter]: For program point L3-3(line 3) no Hoare annotation was computed. [2018-10-26 23:05:33,466 INFO L428 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(line 3) the Hoare annotation is: true [2018-10-26 23:05:33,467 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2018-10-26 23:05:33,467 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(line 3) no Hoare annotation was computed. [2018-10-26 23:05:33,467 INFO L425 ceAbstractionStarter]: For program point L3(line 3) no Hoare annotation was computed. [2018-10-26 23:05:33,467 INFO L425 ceAbstractionStarter]: For program point L3-1(line 3) no Hoare annotation was computed. [2018-10-26 23:05:33,473 WARN L1239 BoogieBacktranslator]: unknown boogie variable #memory_int [2018-10-26 23:05:33,474 WARN L1239 BoogieBacktranslator]: unknown boogie variable #memory_int [2018-10-26 23:05:33,482 WARN L1239 BoogieBacktranslator]: unknown boogie variable #memory_int [2018-10-26 23:05:33,483 WARN L1239 BoogieBacktranslator]: unknown boogie variable #memory_int [2018-10-26 23:05:33,485 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.10 11:05:33 BoogieIcfgContainer [2018-10-26 23:05:33,485 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-26 23:05:33,485 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-10-26 23:05:33,485 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-10-26 23:05:33,486 INFO L276 PluginConnector]: Witness Printer initialized [2018-10-26 23:05:33,486 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 11:05:24" (3/4) ... [2018-10-26 23:05:33,489 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-10-26 23:05:33,493 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-10-26 23:05:33,494 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-10-26 23:05:33,494 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2018-10-26 23:05:33,497 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 19 nodes and edges [2018-10-26 23:05:33,498 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2018-10-26 23:05:33,498 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2018-10-26 23:05:33,498 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-10-26 23:05:33,538 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_3591e1e5-34ff-48f0-ae6e-2f9caeb3ee98/bin-2019/utaipan/witness.graphml [2018-10-26 23:05:33,539 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-10-26 23:05:33,539 INFO L168 Benchmark]: Toolchain (without parser) took 9815.40 ms. Allocated memory was 1.0 GB in the beginning and 1.7 GB in the end (delta: 658.5 MB). Free memory was 961.8 MB in the beginning and 1.5 GB in the end (delta: -579.8 MB). Peak memory consumption was 78.7 MB. Max. memory is 11.5 GB. [2018-10-26 23:05:33,540 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-26 23:05:33,541 INFO L168 Benchmark]: CACSL2BoogieTranslator took 211.69 ms. Allocated memory is still 1.0 GB. Free memory was 961.8 MB in the beginning and 950.0 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 11.5 GB. [2018-10-26 23:05:33,542 INFO L168 Benchmark]: Boogie Procedure Inliner took 30.97 ms. Allocated memory is still 1.0 GB. Free memory was 950.0 MB in the beginning and 947.3 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-10-26 23:05:33,543 INFO L168 Benchmark]: Boogie Preprocessor took 20.38 ms. Allocated memory is still 1.0 GB. Free memory is still 947.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-26 23:05:33,543 INFO L168 Benchmark]: RCFGBuilder took 544.90 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 161.5 MB). Free memory was 947.3 MB in the beginning and 1.1 GB in the end (delta: -195.4 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. [2018-10-26 23:05:33,544 INFO L168 Benchmark]: TraceAbstraction took 8950.25 ms. Allocated memory was 1.2 GB in the beginning and 1.7 GB in the end (delta: 497.0 MB). Free memory was 1.1 GB in the beginning and 1.5 GB in the end (delta: -398.9 MB). Peak memory consumption was 98.1 MB. Max. memory is 11.5 GB. [2018-10-26 23:05:33,544 INFO L168 Benchmark]: Witness Printer took 53.20 ms. Allocated memory is still 1.7 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-26 23:05:33,548 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 211.69 ms. Allocated memory is still 1.0 GB. Free memory was 961.8 MB in the beginning and 950.0 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 30.97 ms. Allocated memory is still 1.0 GB. Free memory was 950.0 MB in the beginning and 947.3 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 20.38 ms. Allocated memory is still 1.0 GB. Free memory is still 947.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 544.90 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 161.5 MB). Free memory was 947.3 MB in the beginning and 1.1 GB in the end (delta: -195.4 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 8950.25 ms. Allocated memory was 1.2 GB in the beginning and 1.7 GB in the end (delta: 497.0 MB). Free memory was 1.1 GB in the beginning and 1.5 GB in the end (delta: -398.9 MB). Peak memory consumption was 98.1 MB. Max. memory is 11.5 GB. * Witness Printer took 53.20 ms. Allocated memory is still 1.7 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 11]: Loop Invariant [2018-10-26 23:05:33,553 WARN L1239 BoogieBacktranslator]: unknown boogie variable #memory_int [2018-10-26 23:05:33,553 WARN L1239 BoogieBacktranslator]: unknown boogie variable #memory_int [2018-10-26 23:05:33,559 WARN L1239 BoogieBacktranslator]: unknown boogie variable #memory_int [2018-10-26 23:05:33,559 WARN L1239 BoogieBacktranslator]: unknown boogie variable #memory_int Derived loop invariant: (((0 <= pos && unknown-#memory_int-unknown[a][4 * pos + a] == marker) && i == 0) && a == 0) || ((((!(4 * pos + a == 0) && 0 <= pos) && marker == unknown-#memory_int-unknown[a][a + 4 * pos]) && i < pos + 1) && a == 0) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 22 locations, 1 error locations. SAFE Result, 8.8s OverallTime, 5 OverallIterations, 5 TraceHistogramMax, 1.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.1s HoareAnnotationTime, HoareTripleCheckerStatistics: 67 SDtfs, 75 SDslu, 226 SDs, 0 SdLazy, 224 SolverSat, 38 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 181 GetRequests, 93 SyntacticMatches, 4 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 859 ImplicationChecksByTransitivity, 4.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=27occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 2.1s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 13 PreInvPairs, 24 NumberOfFragments, 84 HoareAnnotationTreeSize, 13 FomulaSimplifications, 16 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 347 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 4.6s InterpolantComputationTime, 152 NumberOfCodeBlocks, 152 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 204 ConstructedInterpolants, 17 QuantifiedInterpolants, 58699 SizeOfPredicates, 62 NumberOfNonLiveVariables, 356 ConjunctsInSsa, 132 ConjunctsInUnsatCore, 11 InterpolantComputations, 2 PerfectInterpolantSequences, 3/126 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...