./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-invgen/large_const_true-unreach-call_true-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_8e288f19-9c17-40b1-8497-cd6ca004b057/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_8e288f19-9c17-40b1-8497-cd6ca004b057/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_8e288f19-9c17-40b1-8497-cd6ca004b057/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_8e288f19-9c17-40b1-8497-cd6ca004b057/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-invgen/large_const_true-unreach-call_true-termination.i -s /tmp/vcloud-vcloud-master/worker/working_dir_8e288f19-9c17-40b1-8497-cd6ca004b057/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_8e288f19-9c17-40b1-8497-cd6ca004b057/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 b03e1cb325e2c3a8ef30197a8e07012b3a728d97 ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-635dfa2 [2018-12-08 16:44:46,462 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-08 16:44:46,463 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-08 16:44:46,469 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-08 16:44:46,469 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-08 16:44:46,470 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-08 16:44:46,471 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-08 16:44:46,472 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-08 16:44:46,472 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-08 16:44:46,473 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-08 16:44:46,473 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-08 16:44:46,474 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-08 16:44:46,474 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-08 16:44:46,475 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-08 16:44:46,475 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-08 16:44:46,476 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-08 16:44:46,476 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-08 16:44:46,477 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-08 16:44:46,478 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-08 16:44:46,479 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-08 16:44:46,479 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-08 16:44:46,480 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-08 16:44:46,481 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-08 16:44:46,481 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-08 16:44:46,481 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-08 16:44:46,482 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-08 16:44:46,482 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-08 16:44:46,483 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-08 16:44:46,483 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-08 16:44:46,484 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-08 16:44:46,484 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-08 16:44:46,484 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-08 16:44:46,484 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-08 16:44:46,484 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-08 16:44:46,485 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-08 16:44:46,485 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-08 16:44:46,485 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_8e288f19-9c17-40b1-8497-cd6ca004b057/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-12-08 16:44:46,493 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-08 16:44:46,493 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-08 16:44:46,493 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-08 16:44:46,494 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-08 16:44:46,494 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-08 16:44:46,494 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-08 16:44:46,494 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-08 16:44:46,494 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-08 16:44:46,494 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-08 16:44:46,494 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-08 16:44:46,494 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-08 16:44:46,494 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-12-08 16:44:46,495 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-08 16:44:46,495 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-08 16:44:46,495 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-08 16:44:46,495 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-08 16:44:46,495 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-08 16:44:46,495 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-08 16:44:46,495 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-08 16:44:46,496 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-08 16:44:46,496 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-08 16:44:46,496 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-08 16:44:46,496 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-08 16:44:46,496 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-08 16:44:46,496 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-08 16:44:46,496 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-08 16:44:46,496 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-08 16:44:46,496 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-08 16:44:46,496 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-08 16:44:46,496 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-08 16:44:46,497 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-08 16:44:46,497 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-08 16:44:46,497 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-08 16:44:46,497 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-08 16:44:46,497 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-08 16:44:46,497 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-12-08 16:44:46,497 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_8e288f19-9c17-40b1-8497-cd6ca004b057/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 -> b03e1cb325e2c3a8ef30197a8e07012b3a728d97 [2018-12-08 16:44:46,515 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-08 16:44:46,524 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-08 16:44:46,527 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-08 16:44:46,528 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-08 16:44:46,528 INFO L276 PluginConnector]: CDTParser initialized [2018-12-08 16:44:46,529 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_8e288f19-9c17-40b1-8497-cd6ca004b057/bin-2019/utaipan/../../sv-benchmarks/c/loop-invgen/large_const_true-unreach-call_true-termination.i [2018-12-08 16:44:46,568 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_8e288f19-9c17-40b1-8497-cd6ca004b057/bin-2019/utaipan/data/2d2988ae9/10decb71cb3f4d64ad9bc65ce2b72d6a/FLAGb0c30f56f [2018-12-08 16:44:47,002 INFO L307 CDTParser]: Found 1 translation units. [2018-12-08 16:44:47,002 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_8e288f19-9c17-40b1-8497-cd6ca004b057/sv-benchmarks/c/loop-invgen/large_const_true-unreach-call_true-termination.i [2018-12-08 16:44:47,006 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_8e288f19-9c17-40b1-8497-cd6ca004b057/bin-2019/utaipan/data/2d2988ae9/10decb71cb3f4d64ad9bc65ce2b72d6a/FLAGb0c30f56f [2018-12-08 16:44:47,014 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_8e288f19-9c17-40b1-8497-cd6ca004b057/bin-2019/utaipan/data/2d2988ae9/10decb71cb3f4d64ad9bc65ce2b72d6a [2018-12-08 16:44:47,016 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-08 16:44:47,017 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-08 16:44:47,017 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-08 16:44:47,017 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-08 16:44:47,019 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-08 16:44:47,020 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.12 04:44:47" (1/1) ... [2018-12-08 16:44:47,022 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2dec73bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 04:44:47, skipping insertion in model container [2018-12-08 16:44:47,022 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.12 04:44:47" (1/1) ... [2018-12-08 16:44:47,028 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-08 16:44:47,038 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-08 16:44:47,129 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-08 16:44:47,132 INFO L191 MainTranslator]: Completed pre-run [2018-12-08 16:44:47,142 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-08 16:44:47,149 INFO L195 MainTranslator]: Completed translation [2018-12-08 16:44:47,150 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 04:44:47 WrapperNode [2018-12-08 16:44:47,150 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-08 16:44:47,150 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-08 16:44:47,150 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-08 16:44:47,150 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-08 16:44:47,155 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 04:44:47" (1/1) ... [2018-12-08 16:44:47,158 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 04:44:47" (1/1) ... [2018-12-08 16:44:47,161 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-08 16:44:47,162 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-08 16:44:47,162 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-08 16:44:47,162 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-08 16:44:47,167 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 04:44:47" (1/1) ... [2018-12-08 16:44:47,167 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 04:44:47" (1/1) ... [2018-12-08 16:44:47,167 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 04:44:47" (1/1) ... [2018-12-08 16:44:47,168 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 04:44:47" (1/1) ... [2018-12-08 16:44:47,170 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 04:44:47" (1/1) ... [2018-12-08 16:44:47,172 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 04:44:47" (1/1) ... [2018-12-08 16:44:47,173 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 04:44:47" (1/1) ... [2018-12-08 16:44:47,174 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-08 16:44:47,174 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-08 16:44:47,174 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-08 16:44:47,174 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-08 16:44:47,175 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 04:44:47" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8e288f19-9c17-40b1-8497-cd6ca004b057/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 [2018-12-08 16:44:47,234 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-08 16:44:47,234 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-08 16:44:47,234 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-08 16:44:47,234 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-08 16:44:47,234 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-08 16:44:47,234 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-08 16:44:47,234 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-12-08 16:44:47,235 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-12-08 16:44:47,345 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-08 16:44:47,345 INFO L280 CfgBuilder]: Removed 2 assue(true) statements. [2018-12-08 16:44:47,345 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.12 04:44:47 BoogieIcfgContainer [2018-12-08 16:44:47,345 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-08 16:44:47,346 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-08 16:44:47,346 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-08 16:44:47,348 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-08 16:44:47,348 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.12 04:44:47" (1/3) ... [2018-12-08 16:44:47,348 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ae0779e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.12 04:44:47, skipping insertion in model container [2018-12-08 16:44:47,348 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 04:44:47" (2/3) ... [2018-12-08 16:44:47,349 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ae0779e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.12 04:44:47, skipping insertion in model container [2018-12-08 16:44:47,349 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.12 04:44:47" (3/3) ... [2018-12-08 16:44:47,350 INFO L112 eAbstractionObserver]: Analyzing ICFG large_const_true-unreach-call_true-termination.i [2018-12-08 16:44:47,355 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-08 16:44:47,360 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-08 16:44:47,369 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-08 16:44:47,386 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-08 16:44:47,386 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-08 16:44:47,386 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-08 16:44:47,386 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-08 16:44:47,386 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-08 16:44:47,386 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-08 16:44:47,387 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-08 16:44:47,387 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-08 16:44:47,396 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2018-12-08 16:44:47,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-12-08 16:44:47,399 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 16:44:47,399 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 16:44:47,401 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 16:44:47,404 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 16:44:47,404 INFO L82 PathProgramCache]: Analyzing trace with hash 576145336, now seen corresponding path program 1 times [2018-12-08 16:44:47,405 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 16:44:47,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:44:47,434 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 16:44:47,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:44:47,434 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 16:44:47,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 16:44:47,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 16:44:47,473 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-08 16:44:47,473 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-08 16:44:47,473 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-08 16:44:47,475 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-12-08 16:44:47,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-12-08 16:44:47,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-12-08 16:44:47,484 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 2 states. [2018-12-08 16:44:47,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 16:44:47,496 INFO L93 Difference]: Finished difference Result 40 states and 51 transitions. [2018-12-08 16:44:47,496 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-12-08 16:44:47,497 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 13 [2018-12-08 16:44:47,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 16:44:47,502 INFO L225 Difference]: With dead ends: 40 [2018-12-08 16:44:47,502 INFO L226 Difference]: Without dead ends: 20 [2018-12-08 16:44:47,504 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 [2018-12-08 16:44:47,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-12-08 16:44:47,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-12-08 16:44:47,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-12-08 16:44:47,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2018-12-08 16:44:47,524 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 13 [2018-12-08 16:44:47,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 16:44:47,524 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2018-12-08 16:44:47,524 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-12-08 16:44:47,524 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2018-12-08 16:44:47,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-12-08 16:44:47,525 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 16:44:47,525 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 16:44:47,525 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 16:44:47,525 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 16:44:47,525 INFO L82 PathProgramCache]: Analyzing trace with hash 893444581, now seen corresponding path program 1 times [2018-12-08 16:44:47,525 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 16:44:47,526 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:44:47,526 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 16:44:47,526 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:44:47,526 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 16:44:47,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 16:44:47,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 16:44:47,564 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-08 16:44:47,564 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-08 16:44:47,564 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-08 16:44:47,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-08 16:44:47,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-08 16:44:47,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-08 16:44:47,565 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 5 states. [2018-12-08 16:44:47,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 16:44:47,603 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2018-12-08 16:44:47,604 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-08 16:44:47,604 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-12-08 16:44:47,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 16:44:47,604 INFO L225 Difference]: With dead ends: 32 [2018-12-08 16:44:47,604 INFO L226 Difference]: Without dead ends: 21 [2018-12-08 16:44:47,605 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-12-08 16:44:47,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-12-08 16:44:47,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-12-08 16:44:47,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-12-08 16:44:47,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2018-12-08 16:44:47,608 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 13 [2018-12-08 16:44:47,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 16:44:47,608 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2018-12-08 16:44:47,608 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-08 16:44:47,608 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2018-12-08 16:44:47,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-12-08 16:44:47,608 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 16:44:47,608 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 16:44:47,608 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 16:44:47,609 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 16:44:47,609 INFO L82 PathProgramCache]: Analyzing trace with hash -884671747, now seen corresponding path program 1 times [2018-12-08 16:44:47,609 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 16:44:47,609 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:44:47,609 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 16:44:47,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:44:47,610 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 16:44:47,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 16:44:47,660 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 16:44:47,660 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 16:44:47,660 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 16:44:47,661 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 17 with the following transitions: [2018-12-08 16:44:47,663 INFO L205 CegarAbsIntRunner]: [0], [4], [8], [15], [17], [21], [24], [36], [45], [53], [56], [58], [64], [65], [66], [68] [2018-12-08 16:44:47,690 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-08 16:44:47,690 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-08 16:44:47,807 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-08 16:44:47,807 INFO L272 AbstractInterpreter]: Visited 16 different actions 46 times. Merged at 6 different actions 18 times. Widened at 1 different actions 1 times. Performed 204 root evaluator evaluations with a maximum evaluation depth of 4. Performed 204 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 1 fixpoints after 1 different actions. Largest state had 17 variables. [2018-12-08 16:44:47,812 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 16:44:47,812 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-08 16:44:47,812 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 16:44:47,812 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8e288f19-9c17-40b1-8497-cd6ca004b057/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 [2018-12-08 16:44:47,819 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 16:44:47,819 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-08 16:44:47,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 16:44:47,833 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 16:44:47,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 16:44:47,867 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 16:44:47,921 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 16:44:47,935 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-08 16:44:47,935 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2018-12-08 16:44:47,935 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-08 16:44:47,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-08 16:44:47,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-08 16:44:47,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2018-12-08 16:44:47,936 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand 8 states. [2018-12-08 16:44:47,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 16:44:47,998 INFO L93 Difference]: Finished difference Result 41 states and 50 transitions. [2018-12-08 16:44:47,998 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-08 16:44:47,998 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2018-12-08 16:44:47,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 16:44:47,999 INFO L225 Difference]: With dead ends: 41 [2018-12-08 16:44:47,999 INFO L226 Difference]: Without dead ends: 39 [2018-12-08 16:44:48,000 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2018-12-08 16:44:48,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-12-08 16:44:48,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 31. [2018-12-08 16:44:48,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-12-08 16:44:48,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2018-12-08 16:44:48,005 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 16 [2018-12-08 16:44:48,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 16:44:48,006 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2018-12-08 16:44:48,006 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-08 16:44:48,006 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2018-12-08 16:44:48,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-12-08 16:44:48,006 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 16:44:48,006 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 16:44:48,007 INFO L423 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 16:44:48,007 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 16:44:48,007 INFO L82 PathProgramCache]: Analyzing trace with hash 213378718, now seen corresponding path program 1 times [2018-12-08 16:44:48,007 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 16:44:48,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:44:48,007 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 16:44:48,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:44:48,008 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 16:44:48,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 16:44:48,055 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 16:44:48,056 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 16:44:48,056 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 16:44:48,056 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 18 with the following transitions: [2018-12-08 16:44:48,056 INFO L205 CegarAbsIntRunner]: [0], [4], [8], [15], [17], [21], [26], [29], [36], [45], [53], [56], [58], [64], [65], [66], [68] [2018-12-08 16:44:48,057 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-08 16:44:48,058 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-08 16:44:48,098 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-08 16:44:48,098 INFO L272 AbstractInterpreter]: Visited 17 different actions 50 times. Merged at 7 different actions 21 times. Widened at 1 different actions 1 times. Performed 216 root evaluator evaluations with a maximum evaluation depth of 4. Performed 216 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 1 fixpoints after 1 different actions. Largest state had 17 variables. [2018-12-08 16:44:48,102 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 16:44:48,102 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-08 16:44:48,103 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 16:44:48,103 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8e288f19-9c17-40b1-8497-cd6ca004b057/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 [2018-12-08 16:44:48,108 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 16:44:48,108 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-08 16:44:48,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 16:44:48,115 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 16:44:48,130 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 16:44:48,130 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 16:44:48,166 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 16:44:48,180 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-08 16:44:48,181 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2018-12-08 16:44:48,181 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-08 16:44:48,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-08 16:44:48,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-08 16:44:48,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2018-12-08 16:44:48,181 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 8 states. [2018-12-08 16:44:48,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 16:44:48,255 INFO L93 Difference]: Finished difference Result 51 states and 62 transitions. [2018-12-08 16:44:48,255 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-08 16:44:48,255 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2018-12-08 16:44:48,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 16:44:48,257 INFO L225 Difference]: With dead ends: 51 [2018-12-08 16:44:48,257 INFO L226 Difference]: Without dead ends: 49 [2018-12-08 16:44:48,258 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2018-12-08 16:44:48,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-12-08 16:44:48,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 37. [2018-12-08 16:44:48,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-12-08 16:44:48,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2018-12-08 16:44:48,263 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 17 [2018-12-08 16:44:48,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 16:44:48,264 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2018-12-08 16:44:48,264 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-08 16:44:48,264 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2018-12-08 16:44:48,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-12-08 16:44:48,264 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 16:44:48,264 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 16:44:48,265 INFO L423 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 16:44:48,265 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 16:44:48,265 INFO L82 PathProgramCache]: Analyzing trace with hash -595967908, now seen corresponding path program 1 times [2018-12-08 16:44:48,265 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 16:44:48,265 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:44:48,265 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 16:44:48,266 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:44:48,266 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 16:44:48,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 16:44:48,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 16:44:48,310 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 16:44:48,310 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 16:44:48,310 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 18 with the following transitions: [2018-12-08 16:44:48,311 INFO L205 CegarAbsIntRunner]: [0], [4], [8], [15], [17], [21], [26], [31], [36], [45], [53], [56], [58], [64], [65], [66], [68] [2018-12-08 16:44:48,311 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-08 16:44:48,312 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-08 16:44:48,346 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-08 16:44:48,346 INFO L272 AbstractInterpreter]: Visited 17 different actions 50 times. Merged at 7 different actions 21 times. Widened at 1 different actions 1 times. Performed 216 root evaluator evaluations with a maximum evaluation depth of 4. Performed 216 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 1 fixpoints after 1 different actions. Largest state had 17 variables. [2018-12-08 16:44:48,347 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 16:44:48,348 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-08 16:44:48,348 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 16:44:48,348 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8e288f19-9c17-40b1-8497-cd6ca004b057/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 [2018-12-08 16:44:48,356 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 16:44:48,356 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-08 16:44:48,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 16:44:48,364 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 16:44:48,390 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 16:44:48,390 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 16:44:48,439 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 16:44:48,454 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-08 16:44:48,454 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2018-12-08 16:44:48,454 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-08 16:44:48,454 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-08 16:44:48,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-08 16:44:48,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2018-12-08 16:44:48,455 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand 8 states. [2018-12-08 16:44:48,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 16:44:48,511 INFO L93 Difference]: Finished difference Result 55 states and 69 transitions. [2018-12-08 16:44:48,511 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-08 16:44:48,512 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2018-12-08 16:44:48,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 16:44:48,512 INFO L225 Difference]: With dead ends: 55 [2018-12-08 16:44:48,512 INFO L226 Difference]: Without dead ends: 53 [2018-12-08 16:44:48,512 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2018-12-08 16:44:48,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-12-08 16:44:48,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 42. [2018-12-08 16:44:48,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-12-08 16:44:48,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 55 transitions. [2018-12-08 16:44:48,517 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 55 transitions. Word has length 17 [2018-12-08 16:44:48,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 16:44:48,517 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 55 transitions. [2018-12-08 16:44:48,517 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-08 16:44:48,517 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 55 transitions. [2018-12-08 16:44:48,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-12-08 16:44:48,517 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 16:44:48,517 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 16:44:48,518 INFO L423 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 16:44:48,518 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 16:44:48,518 INFO L82 PathProgramCache]: Analyzing trace with hash 1650045878, now seen corresponding path program 1 times [2018-12-08 16:44:48,518 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 16:44:48,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:44:48,518 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 16:44:48,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:44:48,518 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 16:44:48,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 16:44:48,535 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 16:44:48,535 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 16:44:48,535 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 16:44:48,535 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 21 with the following transitions: [2018-12-08 16:44:48,535 INFO L205 CegarAbsIntRunner]: [0], [4], [8], [15], [17], [21], [24], [26], [29], [36], [45], [53], [56], [58], [64], [65], [66], [68] [2018-12-08 16:44:48,536 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-08 16:44:48,536 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-08 16:44:48,568 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-08 16:44:48,569 INFO L272 AbstractInterpreter]: Visited 18 different actions 54 times. Merged at 8 different actions 21 times. Widened at 1 different actions 1 times. Performed 240 root evaluator evaluations with a maximum evaluation depth of 4. Performed 240 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 5 fixpoints after 2 different actions. Largest state had 17 variables. [2018-12-08 16:44:48,570 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 16:44:48,571 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-08 16:44:48,571 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 16:44:48,571 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8e288f19-9c17-40b1-8497-cd6ca004b057/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 [2018-12-08 16:44:48,576 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 16:44:48,577 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-08 16:44:48,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 16:44:48,585 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 16:44:48,594 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 16:44:48,594 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 16:44:48,608 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 16:44:48,622 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-12-08 16:44:48,622 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 6 [2018-12-08 16:44:48,622 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-08 16:44:48,622 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-08 16:44:48,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-08 16:44:48,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-12-08 16:44:48,623 INFO L87 Difference]: Start difference. First operand 42 states and 55 transitions. Second operand 5 states. [2018-12-08 16:44:48,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 16:44:48,632 INFO L93 Difference]: Finished difference Result 61 states and 77 transitions. [2018-12-08 16:44:48,632 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-08 16:44:48,633 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2018-12-08 16:44:48,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 16:44:48,633 INFO L225 Difference]: With dead ends: 61 [2018-12-08 16:44:48,633 INFO L226 Difference]: Without dead ends: 29 [2018-12-08 16:44:48,633 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-12-08 16:44:48,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-12-08 16:44:48,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2018-12-08 16:44:48,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-12-08 16:44:48,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2018-12-08 16:44:48,637 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 20 [2018-12-08 16:44:48,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 16:44:48,637 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2018-12-08 16:44:48,637 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-08 16:44:48,637 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2018-12-08 16:44:48,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-12-08 16:44:48,637 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 16:44:48,637 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 16:44:48,638 INFO L423 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 16:44:48,638 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 16:44:48,638 INFO L82 PathProgramCache]: Analyzing trace with hash -785465255, now seen corresponding path program 1 times [2018-12-08 16:44:48,638 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 16:44:48,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:44:48,638 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 16:44:48,639 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:44:48,639 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 16:44:48,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 16:44:48,663 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 16:44:48,663 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-08 16:44:48,663 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-08 16:44:48,663 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-08 16:44:48,664 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-08 16:44:48,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-08 16:44:48,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-12-08 16:44:48,664 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 5 states. [2018-12-08 16:44:48,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 16:44:48,694 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2018-12-08 16:44:48,694 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-08 16:44:48,694 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2018-12-08 16:44:48,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 16:44:48,694 INFO L225 Difference]: With dead ends: 29 [2018-12-08 16:44:48,694 INFO L226 Difference]: Without dead ends: 0 [2018-12-08 16:44:48,694 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-12-08 16:44:48,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-12-08 16:44:48,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-12-08 16:44:48,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-12-08 16:44:48,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-12-08 16:44:48,695 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 23 [2018-12-08 16:44:48,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 16:44:48,695 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-08 16:44:48,695 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-08 16:44:48,695 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-12-08 16:44:48,696 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-08 16:44:48,699 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-12-08 16:44:48,869 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-12-08 16:44:48,869 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-12-08 16:44:48,869 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-12-08 16:44:48,869 INFO L451 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-12-08 16:44:48,869 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-12-08 16:44:48,870 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-12-08 16:44:48,870 INFO L444 ceAbstractionStarter]: At program point L33(line 33) the Hoare annotation is: (and (<= 10000 main_~c3~0) (<= 2000 main_~c2~0) (<= 4000 main_~c1~0) (<= 1 main_~i~0) (<= 2000 main_~k~0) (<= main_~n~0 1) (<= main_~n~0 (+ main_~j~0 1))) [2018-12-08 16:44:48,870 INFO L448 ceAbstractionStarter]: For program point L33-1(line 33) no Hoare annotation was computed. [2018-12-08 16:44:48,870 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 10 38) no Hoare annotation was computed. [2018-12-08 16:44:48,870 INFO L448 ceAbstractionStarter]: For program point L23(line 23) no Hoare annotation was computed. [2018-12-08 16:44:48,870 INFO L448 ceAbstractionStarter]: For program point L17(line 17) no Hoare annotation was computed. [2018-12-08 16:44:48,870 INFO L448 ceAbstractionStarter]: For program point mainFINAL(lines 10 38) no Hoare annotation was computed. [2018-12-08 16:44:48,870 INFO L444 ceAbstractionStarter]: At program point L32-2(lines 32 36) the Hoare annotation is: (let ((.cse1 (<= 10000 main_~c3~0)) (.cse2 (<= 2000 main_~c2~0)) (.cse3 (<= 4000 main_~c1~0)) (.cse0 (<= 1 main_~i~0)) (.cse4 (<= main_~n~0 1)) (.cse5 (<= main_~n~0 main_~j~0))) (or (and .cse0 (and .cse1 (and .cse2 .cse3 (<= 2000 main_~k~0))) .cse4 (<= main_~n~0 (+ main_~j~0 1))) (and (<= main_~n~0 0) (<= main_~i~0 0) .cse5) (and .cse1 .cse2 .cse3 .cse0 .cse4 .cse5))) [2018-12-08 16:44:48,870 INFO L451 ceAbstractionStarter]: At program point mainENTRY(lines 10 38) the Hoare annotation is: true [2018-12-08 16:44:48,870 INFO L448 ceAbstractionStarter]: For program point L32-3(lines 32 36) no Hoare annotation was computed. [2018-12-08 16:44:48,870 INFO L448 ceAbstractionStarter]: For program point L26(lines 26 29) no Hoare annotation was computed. [2018-12-08 16:44:48,871 INFO L448 ceAbstractionStarter]: For program point L24(lines 24 29) no Hoare annotation was computed. [2018-12-08 16:44:48,871 INFO L444 ceAbstractionStarter]: At program point L26-2(lines 20 30) the Hoare annotation is: (let ((.cse0 (<= 10000 main_~c3~0)) (.cse1 (<= 2000 main_~c2~0)) (.cse2 (<= 4000 main_~c1~0))) (or (and (and .cse0 .cse1 .cse2 (<= 1 main_~i~0) (<= 2000 main_~k~0)) (<= main_~n~0 1)) (and .cse0 .cse1 .cse2 (<= 0 main_~i~0) (<= 0 main_~k~0) (<= main_~i~0 0)))) [2018-12-08 16:44:48,871 INFO L448 ceAbstractionStarter]: For program point L20-2(lines 20 30) no Hoare annotation was computed. [2018-12-08 16:44:48,871 INFO L451 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2018-12-08 16:44:48,871 INFO L448 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2018-12-08 16:44:48,871 INFO L448 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2018-12-08 16:44:48,871 INFO L448 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2018-12-08 16:44:48,871 INFO L448 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2018-12-08 16:44:48,871 INFO L448 ceAbstractionStarter]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2018-12-08 16:44:48,880 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 08.12 04:44:48 BoogieIcfgContainer [2018-12-08 16:44:48,880 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-08 16:44:48,881 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-08 16:44:48,881 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-08 16:44:48,881 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-08 16:44:48,881 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.12 04:44:47" (3/4) ... [2018-12-08 16:44:48,884 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-12-08 16:44:48,887 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-12-08 16:44:48,887 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-12-08 16:44:48,887 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2018-12-08 16:44:48,890 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2018-12-08 16:44:48,890 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-12-08 16:44:48,890 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-12-08 16:44:48,915 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_8e288f19-9c17-40b1-8497-cd6ca004b057/bin-2019/utaipan/witness.graphml [2018-12-08 16:44:48,915 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-08 16:44:48,916 INFO L168 Benchmark]: Toolchain (without parser) took 1899.43 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 114.3 MB). Free memory was 957.1 MB in the beginning and 1.1 GB in the end (delta: -127.7 MB). There was no memory consumed. Max. memory is 11.5 GB. [2018-12-08 16:44:48,916 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 976.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-08 16:44:48,917 INFO L168 Benchmark]: CACSL2BoogieTranslator took 132.64 ms. Allocated memory is still 1.0 GB. Free memory was 957.1 MB in the beginning and 946.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-12-08 16:44:48,917 INFO L168 Benchmark]: Boogie Procedure Inliner took 11.27 ms. Allocated memory is still 1.0 GB. Free memory is still 946.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-08 16:44:48,917 INFO L168 Benchmark]: Boogie Preprocessor took 12.11 ms. Allocated memory is still 1.0 GB. Free memory was 946.3 MB in the beginning and 941.0 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2018-12-08 16:44:48,918 INFO L168 Benchmark]: RCFGBuilder took 171.45 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 114.3 MB). Free memory was 941.0 MB in the beginning and 1.1 GB in the end (delta: -154.3 MB). Peak memory consumption was 13.0 MB. Max. memory is 11.5 GB. [2018-12-08 16:44:48,918 INFO L168 Benchmark]: TraceAbstraction took 1534.53 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.5 MB). Peak memory consumption was 251.7 MB. Max. memory is 11.5 GB. [2018-12-08 16:44:48,918 INFO L168 Benchmark]: Witness Printer took 34.54 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.0 MB). Peak memory consumption was 5.0 MB. Max. memory is 11.5 GB. [2018-12-08 16:44:48,920 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 976.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 132.64 ms. Allocated memory is still 1.0 GB. Free memory was 957.1 MB in the beginning and 946.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 11.27 ms. Allocated memory is still 1.0 GB. Free memory is still 946.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 12.11 ms. Allocated memory is still 1.0 GB. Free memory was 946.3 MB in the beginning and 941.0 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 171.45 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 114.3 MB). Free memory was 941.0 MB in the beginning and 1.1 GB in the end (delta: -154.3 MB). Peak memory consumption was 13.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1534.53 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.5 MB). Peak memory consumption was 251.7 MB. Max. memory is 11.5 GB. * Witness Printer took 34.54 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.0 MB). Peak memory consumption was 5.0 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 20]: Loop Invariant Derived loop invariant: (((((10000 <= c3 && 2000 <= c2) && 4000 <= c1) && 1 <= i) && 2000 <= k) && n <= 1) || (((((10000 <= c3 && 2000 <= c2) && 4000 <= c1) && 0 <= i) && 0 <= k) && i <= 0) - InvariantResult [Line: 32]: Loop Invariant Derived loop invariant: ((((1 <= i && 10000 <= c3 && (2000 <= c2 && 4000 <= c1) && 2000 <= k) && n <= 1) && n <= j + 1) || ((n <= 0 && i <= 0) && n <= j)) || (((((10000 <= c3 && 2000 <= c2) && 4000 <= c1) && 1 <= i) && n <= 1) && n <= j) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 25 locations, 1 error locations. SAFE Result, 1.4s OverallTime, 7 OverallIterations, 2 TraceHistogramMax, 0.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.1s HoareAnnotationTime, HoareTripleCheckerStatistics: 168 SDtfs, 114 SDslu, 370 SDs, 0 SdLazy, 211 SolverSat, 44 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 184 GetRequests, 126 SyntacticMatches, 5 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.2s AbstIntTime, 4 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 33 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 13 PreInvPairs, 19 NumberOfFragments, 127 HoareAnnotationTreeSize, 13 FomulaSimplifications, 127 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 101 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 189 NumberOfCodeBlocks, 189 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 244 ConstructedInterpolants, 0 QuantifiedInterpolants, 9676 SizeOfPredicates, 11 NumberOfNonLiveVariables, 267 ConjunctsInSsa, 31 ConjunctsInUnsatCore, 15 InterpolantComputations, 4 PerfectInterpolantSequences, 18/29 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...