./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/id_i10_o10_true-unreach-call_true-termination.c --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_5b558b36-dd6a-455d-9439-6ff62d132e77/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_5b558b36-dd6a-455d-9439-6ff62d132e77/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_5b558b36-dd6a-455d-9439-6ff62d132e77/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_5b558b36-dd6a-455d-9439-6ff62d132e77/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive-simple/id_i10_o10_true-unreach-call_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_5b558b36-dd6a-455d-9439-6ff62d132e77/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_5b558b36-dd6a-455d-9439-6ff62d132e77/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 d354f5dc1a4e4616bf2c7c7fc4888805a134a8dd ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-635dfa2 [2018-12-09 16:30:26,096 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-09 16:30:26,097 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-09 16:30:26,103 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-09 16:30:26,103 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-09 16:30:26,104 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-09 16:30:26,105 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-09 16:30:26,106 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-09 16:30:26,106 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-09 16:30:26,107 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-09 16:30:26,107 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-09 16:30:26,107 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-09 16:30:26,108 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-09 16:30:26,108 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-09 16:30:26,109 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-09 16:30:26,109 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-09 16:30:26,110 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-09 16:30:26,110 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-09 16:30:26,111 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-09 16:30:26,112 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-09 16:30:26,113 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-09 16:30:26,113 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-09 16:30:26,115 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-09 16:30:26,115 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-09 16:30:26,115 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-09 16:30:26,115 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-09 16:30:26,116 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-09 16:30:26,116 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-09 16:30:26,117 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-09 16:30:26,117 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-09 16:30:26,118 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-09 16:30:26,118 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-09 16:30:26,118 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-09 16:30:26,118 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-09 16:30:26,119 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-09 16:30:26,119 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-09 16:30:26,119 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_5b558b36-dd6a-455d-9439-6ff62d132e77/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-12-09 16:30:26,127 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-09 16:30:26,127 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-09 16:30:26,128 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-09 16:30:26,128 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-09 16:30:26,128 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-09 16:30:26,128 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-09 16:30:26,128 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-09 16:30:26,128 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-09 16:30:26,128 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-09 16:30:26,128 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-09 16:30:26,128 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-09 16:30:26,128 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-12-09 16:30:26,128 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-09 16:30:26,129 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-09 16:30:26,129 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-09 16:30:26,129 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-09 16:30:26,129 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-09 16:30:26,129 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-09 16:30:26,129 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-09 16:30:26,129 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-09 16:30:26,130 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-09 16:30:26,130 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-09 16:30:26,130 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-09 16:30:26,130 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-09 16:30:26,130 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-09 16:30:26,130 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-09 16:30:26,130 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-09 16:30:26,130 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-09 16:30:26,130 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-09 16:30:26,130 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-09 16:30:26,130 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-09 16:30:26,131 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-09 16:30:26,131 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-09 16:30:26,131 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-09 16:30:26,131 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-09 16:30:26,131 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-12-09 16:30:26,131 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_5b558b36-dd6a-455d-9439-6ff62d132e77/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 -> d354f5dc1a4e4616bf2c7c7fc4888805a134a8dd [2018-12-09 16:30:26,149 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-09 16:30:26,158 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-09 16:30:26,160 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-09 16:30:26,161 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-09 16:30:26,162 INFO L276 PluginConnector]: CDTParser initialized [2018-12-09 16:30:26,162 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_5b558b36-dd6a-455d-9439-6ff62d132e77/bin-2019/utaipan/../../sv-benchmarks/c/recursive-simple/id_i10_o10_true-unreach-call_true-termination.c [2018-12-09 16:30:26,207 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_5b558b36-dd6a-455d-9439-6ff62d132e77/bin-2019/utaipan/data/1d5ef9093/47dc7b7c935a42a7b781563ab15616a9/FLAGaebf9c378 [2018-12-09 16:30:26,633 INFO L307 CDTParser]: Found 1 translation units. [2018-12-09 16:30:26,634 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_5b558b36-dd6a-455d-9439-6ff62d132e77/sv-benchmarks/c/recursive-simple/id_i10_o10_true-unreach-call_true-termination.c [2018-12-09 16:30:26,637 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_5b558b36-dd6a-455d-9439-6ff62d132e77/bin-2019/utaipan/data/1d5ef9093/47dc7b7c935a42a7b781563ab15616a9/FLAGaebf9c378 [2018-12-09 16:30:26,644 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_5b558b36-dd6a-455d-9439-6ff62d132e77/bin-2019/utaipan/data/1d5ef9093/47dc7b7c935a42a7b781563ab15616a9 [2018-12-09 16:30:26,646 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-09 16:30:26,647 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-09 16:30:26,648 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-09 16:30:26,648 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-09 16:30:26,650 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-09 16:30:26,650 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 04:30:26" (1/1) ... [2018-12-09 16:30:26,652 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bf44b87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:30:26, skipping insertion in model container [2018-12-09 16:30:26,652 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 04:30:26" (1/1) ... [2018-12-09 16:30:26,656 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-09 16:30:26,664 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-09 16:30:26,750 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-09 16:30:26,752 INFO L191 MainTranslator]: Completed pre-run [2018-12-09 16:30:26,761 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-09 16:30:26,769 INFO L195 MainTranslator]: Completed translation [2018-12-09 16:30:26,769 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:30:26 WrapperNode [2018-12-09 16:30:26,769 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-09 16:30:26,769 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-09 16:30:26,770 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-09 16:30:26,770 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-09 16:30:26,775 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:30:26" (1/1) ... [2018-12-09 16:30:26,777 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:30:26" (1/1) ... [2018-12-09 16:30:26,781 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-09 16:30:26,781 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-09 16:30:26,781 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-09 16:30:26,781 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-09 16:30:26,786 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:30:26" (1/1) ... [2018-12-09 16:30:26,786 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:30:26" (1/1) ... [2018-12-09 16:30:26,787 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:30:26" (1/1) ... [2018-12-09 16:30:26,787 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:30:26" (1/1) ... [2018-12-09 16:30:26,789 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:30:26" (1/1) ... [2018-12-09 16:30:26,790 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:30:26" (1/1) ... [2018-12-09 16:30:26,790 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:30:26" (1/1) ... [2018-12-09 16:30:26,791 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-09 16:30:26,791 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-09 16:30:26,791 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-09 16:30:26,791 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-09 16:30:26,792 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:30:26" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5b558b36-dd6a-455d-9439-6ff62d132e77/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 [2018-12-09 16:30:26,851 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-09 16:30:26,851 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-09 16:30:26,851 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-09 16:30:26,851 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-09 16:30:26,852 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-09 16:30:26,852 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-09 16:30:26,852 INFO L130 BoogieDeclarations]: Found specification of procedure id [2018-12-09 16:30:26,852 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2018-12-09 16:30:26,936 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-09 16:30:26,936 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-12-09 16:30:26,936 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 04:30:26 BoogieIcfgContainer [2018-12-09 16:30:26,936 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-09 16:30:26,937 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-09 16:30:26,937 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-09 16:30:26,939 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-09 16:30:26,940 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 04:30:26" (1/3) ... [2018-12-09 16:30:26,940 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45072128 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 04:30:26, skipping insertion in model container [2018-12-09 16:30:26,940 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:30:26" (2/3) ... [2018-12-09 16:30:26,941 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45072128 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 04:30:26, skipping insertion in model container [2018-12-09 16:30:26,941 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 04:30:26" (3/3) ... [2018-12-09 16:30:26,942 INFO L112 eAbstractionObserver]: Analyzing ICFG id_i10_o10_true-unreach-call_true-termination.c [2018-12-09 16:30:26,948 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-09 16:30:26,952 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-09 16:30:26,961 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-09 16:30:26,981 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-09 16:30:26,981 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-09 16:30:26,982 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-09 16:30:26,982 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-09 16:30:26,982 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-09 16:30:26,982 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-09 16:30:26,982 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-09 16:30:26,982 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-09 16:30:26,997 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2018-12-09 16:30:27,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-12-09 16:30:27,001 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 16:30:27,002 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 16:30:27,004 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 16:30:27,008 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 16:30:27,008 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2018-12-09 16:30:27,010 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 16:30:27,045 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 16:30:27,046 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 16:30:27,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 16:30:27,046 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 16:30:27,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 16:30:27,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 16:30:27,114 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 16:30:27,115 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-09 16:30:27,115 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 16:30:27,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-09 16:30:27,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-09 16:30:27,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-09 16:30:27,126 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2018-12-09 16:30:27,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 16:30:27,170 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2018-12-09 16:30:27,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-09 16:30:27,171 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-12-09 16:30:27,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 16:30:27,177 INFO L225 Difference]: With dead ends: 30 [2018-12-09 16:30:27,177 INFO L226 Difference]: Without dead ends: 18 [2018-12-09 16:30:27,180 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-12-09 16:30:27,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-12-09 16:30:27,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-12-09 16:30:27,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-12-09 16:30:27,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2018-12-09 16:30:27,203 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2018-12-09 16:30:27,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 16:30:27,203 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2018-12-09 16:30:27,204 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-09 16:30:27,204 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2018-12-09 16:30:27,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-12-09 16:30:27,205 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 16:30:27,205 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 16:30:27,205 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 16:30:27,205 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 16:30:27,205 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2018-12-09 16:30:27,206 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 16:30:27,206 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 16:30:27,206 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 16:30:27,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 16:30:27,207 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 16:30:27,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 16:30:27,242 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-09 16:30:27,242 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 16:30:27,242 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 16:30:27,243 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 20 with the following transitions: [2018-12-09 16:30:27,244 INFO L205 CegarAbsIntRunner]: [0], [4], [6], [9], [11], [17], [20], [21], [23], [24], [25], [26], [27], [29], [30], [31], [32] [2018-12-09 16:30:27,263 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-09 16:30:27,263 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-09 16:30:27,350 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-09 16:30:27,351 INFO L272 AbstractInterpreter]: Visited 17 different actions 50 times. Never merged. Widened at 1 different actions 2 times. Performed 106 root evaluator evaluations with a maximum evaluation depth of 3. Performed 106 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 1 fixpoints after 1 different actions. Largest state had 4 variables. [2018-12-09 16:30:27,357 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 16:30:27,357 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-09 16:30:27,357 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 16:30:27,358 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5b558b36-dd6a-455d-9439-6ff62d132e77/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 [2018-12-09 16:30:27,364 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 16:30:27,364 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 16:30:27,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 16:30:27,377 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 16:30:27,397 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-09 16:30:27,397 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 16:30:27,500 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-09 16:30:27,515 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 16:30:27,515 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 9 [2018-12-09 16:30:27,515 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 16:30:27,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-09 16:30:27,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-09 16:30:27,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2018-12-09 16:30:27,516 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2018-12-09 16:30:27,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 16:30:27,544 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2018-12-09 16:30:27,544 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-09 16:30:27,544 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2018-12-09 16:30:27,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 16:30:27,545 INFO L225 Difference]: With dead ends: 25 [2018-12-09 16:30:27,545 INFO L226 Difference]: Without dead ends: 21 [2018-12-09 16:30:27,546 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2018-12-09 16:30:27,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-12-09 16:30:27,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-12-09 16:30:27,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-12-09 16:30:27,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-12-09 16:30:27,549 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2018-12-09 16:30:27,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 16:30:27,549 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-12-09 16:30:27,549 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-09 16:30:27,549 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-12-09 16:30:27,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-12-09 16:30:27,550 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 16:30:27,550 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 16:30:27,550 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 16:30:27,550 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 16:30:27,550 INFO L82 PathProgramCache]: Analyzing trace with hash 397359997, now seen corresponding path program 2 times [2018-12-09 16:30:27,550 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 16:30:27,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 16:30:27,551 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 16:30:27,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 16:30:27,551 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 16:30:27,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 16:30:27,585 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-12-09 16:30:27,585 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 16:30:27,585 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 16:30:27,585 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 16:30:27,585 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 16:30:27,585 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 16:30:27,585 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5b558b36-dd6a-455d-9439-6ff62d132e77/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 [2018-12-09 16:30:27,592 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-09 16:30:27,592 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-09 16:30:27,600 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-12-09 16:30:27,600 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 16:30:27,601 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 16:30:27,607 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-12-09 16:30:27,607 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 16:30:27,762 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-12-09 16:30:27,785 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 16:30:27,785 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 9] total 11 [2018-12-09 16:30:27,785 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 16:30:27,785 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-09 16:30:27,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-09 16:30:27,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2018-12-09 16:30:27,786 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 7 states. [2018-12-09 16:30:27,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 16:30:27,831 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2018-12-09 16:30:27,831 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-09 16:30:27,831 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2018-12-09 16:30:27,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 16:30:27,832 INFO L225 Difference]: With dead ends: 28 [2018-12-09 16:30:27,832 INFO L226 Difference]: Without dead ends: 24 [2018-12-09 16:30:27,832 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 43 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2018-12-09 16:30:27,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-12-09 16:30:27,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-12-09 16:30:27,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-12-09 16:30:27,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2018-12-09 16:30:27,835 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2018-12-09 16:30:27,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 16:30:27,835 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2018-12-09 16:30:27,835 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-09 16:30:27,835 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2018-12-09 16:30:27,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-12-09 16:30:27,836 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 16:30:27,836 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 16:30:27,836 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 16:30:27,836 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 16:30:27,836 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 3 times [2018-12-09 16:30:27,836 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 16:30:27,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 16:30:27,837 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 16:30:27,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 16:30:27,837 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 16:30:27,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 16:30:27,885 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-12-09 16:30:27,885 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 16:30:27,885 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 16:30:27,885 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 16:30:27,885 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 16:30:27,885 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 16:30:27,886 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5b558b36-dd6a-455d-9439-6ff62d132e77/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 [2018-12-09 16:30:27,891 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-09 16:30:27,891 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-09 16:30:27,898 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-09 16:30:27,899 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 16:30:27,900 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 16:30:27,910 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-12-09 16:30:27,910 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 16:30:28,193 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-12-09 16:30:28,207 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 16:30:28,207 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 11] total 13 [2018-12-09 16:30:28,207 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 16:30:28,208 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-09 16:30:28,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-09 16:30:28,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2018-12-09 16:30:28,208 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 8 states. [2018-12-09 16:30:28,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 16:30:28,249 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2018-12-09 16:30:28,249 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-09 16:30:28,249 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2018-12-09 16:30:28,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 16:30:28,250 INFO L225 Difference]: With dead ends: 31 [2018-12-09 16:30:28,250 INFO L226 Difference]: Without dead ends: 27 [2018-12-09 16:30:28,250 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 53 SyntacticMatches, 8 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2018-12-09 16:30:28,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-12-09 16:30:28,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-12-09 16:30:28,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-12-09 16:30:28,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-12-09 16:30:28,253 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2018-12-09 16:30:28,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 16:30:28,253 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-12-09 16:30:28,253 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-09 16:30:28,253 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-12-09 16:30:28,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-12-09 16:30:28,254 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 16:30:28,254 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 16:30:28,254 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 16:30:28,254 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 16:30:28,254 INFO L82 PathProgramCache]: Analyzing trace with hash 1080764669, now seen corresponding path program 4 times [2018-12-09 16:30:28,254 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 16:30:28,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 16:30:28,255 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 16:30:28,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 16:30:28,255 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 16:30:28,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 16:30:28,303 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-12-09 16:30:28,303 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 16:30:28,303 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 16:30:28,303 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 16:30:28,303 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 16:30:28,303 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 16:30:28,303 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5b558b36-dd6a-455d-9439-6ff62d132e77/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 [2018-12-09 16:30:28,309 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 16:30:28,309 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 16:30:28,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 16:30:28,318 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 16:30:28,326 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-12-09 16:30:28,326 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 16:30:28,731 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-12-09 16:30:28,745 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 16:30:28,745 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 13] total 15 [2018-12-09 16:30:28,745 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 16:30:28,746 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-09 16:30:28,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-09 16:30:28,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2018-12-09 16:30:28,746 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 9 states. [2018-12-09 16:30:28,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 16:30:28,789 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2018-12-09 16:30:28,790 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-09 16:30:28,790 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2018-12-09 16:30:28,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 16:30:28,790 INFO L225 Difference]: With dead ends: 34 [2018-12-09 16:30:28,790 INFO L226 Difference]: Without dead ends: 30 [2018-12-09 16:30:28,791 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 63 SyntacticMatches, 10 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2018-12-09 16:30:28,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-12-09 16:30:28,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-12-09 16:30:28,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-12-09 16:30:28,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2018-12-09 16:30:28,793 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2018-12-09 16:30:28,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 16:30:28,794 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2018-12-09 16:30:28,794 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-09 16:30:28,794 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2018-12-09 16:30:28,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-12-09 16:30:28,794 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 16:30:28,794 INFO L402 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 16:30:28,794 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 16:30:28,795 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 16:30:28,795 INFO L82 PathProgramCache]: Analyzing trace with hash -1752970513, now seen corresponding path program 5 times [2018-12-09 16:30:28,795 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 16:30:28,795 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 16:30:28,795 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 16:30:28,795 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 16:30:28,795 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 16:30:28,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 16:30:28,851 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-12-09 16:30:28,851 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 16:30:28,851 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 16:30:28,852 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 16:30:28,852 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 16:30:28,852 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 16:30:28,852 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5b558b36-dd6a-455d-9439-6ff62d132e77/bin-2019/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 16:30:28,858 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-09 16:30:28,858 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-09 16:30:28,869 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-12-09 16:30:28,869 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 16:30:28,871 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 16:30:28,880 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-12-09 16:30:28,880 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 16:30:29,438 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-12-09 16:30:29,452 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 16:30:29,452 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 15] total 17 [2018-12-09 16:30:29,452 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 16:30:29,452 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-09 16:30:29,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-09 16:30:29,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2018-12-09 16:30:29,453 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 10 states. [2018-12-09 16:30:29,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 16:30:29,507 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2018-12-09 16:30:29,507 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-09 16:30:29,507 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2018-12-09 16:30:29,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 16:30:29,508 INFO L225 Difference]: With dead ends: 37 [2018-12-09 16:30:29,508 INFO L226 Difference]: Without dead ends: 33 [2018-12-09 16:30:29,508 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 73 SyntacticMatches, 12 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=164, Invalid=342, Unknown=0, NotChecked=0, Total=506 [2018-12-09 16:30:29,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-12-09 16:30:29,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-12-09 16:30:29,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-12-09 16:30:29,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2018-12-09 16:30:29,511 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2018-12-09 16:30:29,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 16:30:29,511 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2018-12-09 16:30:29,511 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-09 16:30:29,511 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2018-12-09 16:30:29,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-12-09 16:30:29,512 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 16:30:29,512 INFO L402 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 16:30:29,512 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 16:30:29,512 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 16:30:29,512 INFO L82 PathProgramCache]: Analyzing trace with hash -1590630787, now seen corresponding path program 6 times [2018-12-09 16:30:29,512 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 16:30:29,513 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 16:30:29,513 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 16:30:29,513 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 16:30:29,513 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 16:30:29,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 16:30:29,578 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-12-09 16:30:29,578 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 16:30:29,578 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 16:30:29,578 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 16:30:29,578 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 16:30:29,578 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 16:30:29,578 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5b558b36-dd6a-455d-9439-6ff62d132e77/bin-2019/utaipan/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 16:30:29,585 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-09 16:30:29,585 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-09 16:30:29,592 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-09 16:30:29,592 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 16:30:29,594 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 16:30:29,603 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-12-09 16:30:29,603 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 16:30:30,396 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-12-09 16:30:30,410 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 16:30:30,410 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 17] total 19 [2018-12-09 16:30:30,410 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 16:30:30,410 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-09 16:30:30,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-09 16:30:30,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2018-12-09 16:30:30,411 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 11 states. [2018-12-09 16:30:30,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 16:30:30,474 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2018-12-09 16:30:30,474 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-09 16:30:30,475 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 49 [2018-12-09 16:30:30,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 16:30:30,475 INFO L225 Difference]: With dead ends: 40 [2018-12-09 16:30:30,475 INFO L226 Difference]: Without dead ends: 36 [2018-12-09 16:30:30,476 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 83 SyntacticMatches, 14 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=211, Invalid=439, Unknown=0, NotChecked=0, Total=650 [2018-12-09 16:30:30,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-12-09 16:30:30,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-12-09 16:30:30,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-12-09 16:30:30,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2018-12-09 16:30:30,479 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2018-12-09 16:30:30,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 16:30:30,479 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2018-12-09 16:30:30,479 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-09 16:30:30,479 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2018-12-09 16:30:30,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-12-09 16:30:30,480 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 16:30:30,480 INFO L402 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 16:30:30,480 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 16:30:30,480 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 16:30:30,480 INFO L82 PathProgramCache]: Analyzing trace with hash 1532150511, now seen corresponding path program 7 times [2018-12-09 16:30:30,480 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 16:30:30,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 16:30:30,481 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 16:30:30,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 16:30:30,481 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 16:30:30,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 16:30:30,539 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-12-09 16:30:30,539 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 16:30:30,539 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 16:30:30,539 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 16:30:30,539 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 16:30:30,539 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 16:30:30,539 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5b558b36-dd6a-455d-9439-6ff62d132e77/bin-2019/utaipan/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 16:30:30,545 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 16:30:30,545 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 16:30:30,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 16:30:30,554 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 16:30:30,564 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-12-09 16:30:30,564 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 16:30:31,710 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-12-09 16:30:31,725 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 16:30:31,725 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 19] total 21 [2018-12-09 16:30:31,725 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 16:30:31,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-09 16:30:31,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-09 16:30:31,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2018-12-09 16:30:31,726 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 12 states. [2018-12-09 16:30:31,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 16:30:31,797 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2018-12-09 16:30:31,797 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-09 16:30:31,797 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 55 [2018-12-09 16:30:31,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 16:30:31,798 INFO L225 Difference]: With dead ends: 43 [2018-12-09 16:30:31,798 INFO L226 Difference]: Without dead ends: 39 [2018-12-09 16:30:31,798 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 93 SyntacticMatches, 16 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2018-12-09 16:30:31,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-12-09 16:30:31,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-12-09 16:30:31,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-12-09 16:30:31,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2018-12-09 16:30:31,801 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2018-12-09 16:30:31,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 16:30:31,801 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2018-12-09 16:30:31,801 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-09 16:30:31,801 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2018-12-09 16:30:31,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-12-09 16:30:31,802 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 16:30:31,802 INFO L402 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 16:30:31,802 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 16:30:31,802 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 16:30:31,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1140618237, now seen corresponding path program 8 times [2018-12-09 16:30:31,802 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 16:30:31,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 16:30:31,803 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 16:30:31,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 16:30:31,803 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 16:30:31,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 16:30:31,866 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2018-12-09 16:30:31,866 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 16:30:31,866 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 16:30:31,866 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 16:30:31,866 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 16:30:31,867 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 16:30:31,867 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5b558b36-dd6a-455d-9439-6ff62d132e77/bin-2019/utaipan/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 16:30:31,873 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-09 16:30:31,873 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-09 16:30:31,886 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-12-09 16:30:31,886 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 16:30:31,888 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 16:30:31,898 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2018-12-09 16:30:31,899 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 16:30:33,353 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-12-09 16:30:33,368 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 16:30:33,368 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 21] total 23 [2018-12-09 16:30:33,369 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 16:30:33,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-12-09 16:30:33,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-12-09 16:30:33,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2018-12-09 16:30:33,369 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 13 states. [2018-12-09 16:30:33,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 16:30:33,451 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2018-12-09 16:30:33,451 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-12-09 16:30:33,451 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2018-12-09 16:30:33,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 16:30:33,451 INFO L225 Difference]: With dead ends: 46 [2018-12-09 16:30:33,451 INFO L226 Difference]: Without dead ends: 42 [2018-12-09 16:30:33,452 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 103 SyntacticMatches, 18 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=323, Invalid=669, Unknown=0, NotChecked=0, Total=992 [2018-12-09 16:30:33,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-12-09 16:30:33,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-12-09 16:30:33,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-12-09 16:30:33,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2018-12-09 16:30:33,455 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2018-12-09 16:30:33,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 16:30:33,455 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2018-12-09 16:30:33,455 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-12-09 16:30:33,455 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2018-12-09 16:30:33,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-12-09 16:30:33,455 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 16:30:33,455 INFO L402 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 16:30:33,455 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 16:30:33,456 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 16:30:33,456 INFO L82 PathProgramCache]: Analyzing trace with hash -1749177617, now seen corresponding path program 9 times [2018-12-09 16:30:33,456 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 16:30:33,456 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 16:30:33,456 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 16:30:33,456 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 16:30:33,456 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 16:30:33,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 16:30:33,528 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-12-09 16:30:33,528 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 16:30:33,528 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 16:30:33,529 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 16:30:33,529 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 16:30:33,529 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 16:30:33,529 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5b558b36-dd6a-455d-9439-6ff62d132e77/bin-2019/utaipan/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 16:30:33,534 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-09 16:30:33,534 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-09 16:30:33,543 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-09 16:30:33,543 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 16:30:33,545 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 16:30:33,554 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-12-09 16:30:33,554 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 16:30:35,536 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-12-09 16:30:35,551 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 16:30:35,551 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 23] total 24 [2018-12-09 16:30:35,551 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 16:30:35,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-12-09 16:30:35,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-12-09 16:30:35,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2018-12-09 16:30:35,551 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 14 states. [2018-12-09 16:30:35,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 16:30:35,625 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2018-12-09 16:30:35,625 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-12-09 16:30:35,625 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 67 [2018-12-09 16:30:35,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 16:30:35,625 INFO L225 Difference]: With dead ends: 49 [2018-12-09 16:30:35,625 INFO L226 Difference]: Without dead ends: 45 [2018-12-09 16:30:35,626 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 113 SyntacticMatches, 21 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=385, Invalid=737, Unknown=0, NotChecked=0, Total=1122 [2018-12-09 16:30:35,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-12-09 16:30:35,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-12-09 16:30:35,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-12-09 16:30:35,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2018-12-09 16:30:35,628 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2018-12-09 16:30:35,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 16:30:35,629 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2018-12-09 16:30:35,629 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-12-09 16:30:35,629 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2018-12-09 16:30:35,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-12-09 16:30:35,629 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 16:30:35,629 INFO L402 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 16:30:35,630 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 16:30:35,630 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 16:30:35,630 INFO L82 PathProgramCache]: Analyzing trace with hash -1580609155, now seen corresponding path program 10 times [2018-12-09 16:30:35,630 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 16:30:35,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 16:30:35,630 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 16:30:35,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 16:30:35,630 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 16:30:35,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 16:30:35,872 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2018-12-09 16:30:35,872 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 16:30:35,872 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 16:30:35,872 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 16:30:35,872 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 16:30:35,872 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 16:30:35,873 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5b558b36-dd6a-455d-9439-6ff62d132e77/bin-2019/utaipan/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 16:30:35,878 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 16:30:35,878 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 16:30:35,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 16:30:35,891 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 16:30:35,925 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2018-12-09 16:30:35,925 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 16:30:36,397 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2018-12-09 16:30:36,412 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 16:30:36,412 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 25 [2018-12-09 16:30:36,412 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 16:30:36,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-12-09 16:30:36,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-12-09 16:30:36,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2018-12-09 16:30:36,412 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 25 states. [2018-12-09 16:30:36,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 16:30:36,535 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2018-12-09 16:30:36,535 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-12-09 16:30:36,535 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 73 [2018-12-09 16:30:36,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 16:30:36,536 INFO L225 Difference]: With dead ends: 52 [2018-12-09 16:30:36,536 INFO L226 Difference]: Without dead ends: 48 [2018-12-09 16:30:36,536 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 143 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2018-12-09 16:30:36,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-12-09 16:30:36,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-12-09 16:30:36,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-12-09 16:30:36,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2018-12-09 16:30:36,539 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2018-12-09 16:30:36,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 16:30:36,539 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2018-12-09 16:30:36,539 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-12-09 16:30:36,539 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2018-12-09 16:30:36,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-12-09 16:30:36,540 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 16:30:36,540 INFO L402 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 16:30:36,540 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 16:30:36,540 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 16:30:36,540 INFO L82 PathProgramCache]: Analyzing trace with hash -223837457, now seen corresponding path program 11 times [2018-12-09 16:30:36,540 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 16:30:36,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 16:30:36,541 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 16:30:36,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 16:30:36,541 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 16:30:36,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 16:30:36,640 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 187 proven. 0 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2018-12-09 16:30:36,640 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 16:30:36,640 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2018-12-09 16:30:36,640 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 16:30:36,641 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-12-09 16:30:36,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-12-09 16:30:36,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2018-12-09 16:30:36,641 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 16 states. [2018-12-09 16:30:36,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 16:30:36,714 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2018-12-09 16:30:36,714 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-12-09 16:30:36,714 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 79 [2018-12-09 16:30:36,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 16:30:36,714 INFO L225 Difference]: With dead ends: 48 [2018-12-09 16:30:36,714 INFO L226 Difference]: Without dead ends: 0 [2018-12-09 16:30:36,715 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=275, Invalid=481, Unknown=0, NotChecked=0, Total=756 [2018-12-09 16:30:36,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-12-09 16:30:36,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-12-09 16:30:36,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-12-09 16:30:36,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-12-09 16:30:36,715 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 79 [2018-12-09 16:30:36,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 16:30:36,715 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-09 16:30:36,715 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-12-09 16:30:36,715 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-12-09 16:30:36,715 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-09 16:30:36,718 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-12-09 16:30:36,730 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-12-09 16:30:36,730 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-12-09 16:30:36,730 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-12-09 16:30:36,730 INFO L451 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-12-09 16:30:36,730 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-12-09 16:30:36,730 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-12-09 16:30:36,731 INFO L448 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2018-12-09 16:30:36,731 INFO L451 ceAbstractionStarter]: At program point mainENTRY(lines 9 15) the Hoare annotation is: true [2018-12-09 16:30:36,731 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 9 15) no Hoare annotation was computed. [2018-12-09 16:30:36,731 INFO L448 ceAbstractionStarter]: For program point L13(line 13) no Hoare annotation was computed. [2018-12-09 16:30:36,731 INFO L448 ceAbstractionStarter]: For program point L12(lines 12 14) no Hoare annotation was computed. [2018-12-09 16:30:36,731 INFO L444 ceAbstractionStarter]: At program point L11(line 11) the Hoare annotation is: (and (<= 10 main_~input~0) (<= main_~input~0 10)) [2018-12-09 16:30:36,731 INFO L448 ceAbstractionStarter]: For program point L11-1(line 11) no Hoare annotation was computed. [2018-12-09 16:30:36,731 INFO L448 ceAbstractionStarter]: For program point L12-2(lines 9 15) no Hoare annotation was computed. [2018-12-09 16:30:36,731 INFO L448 ceAbstractionStarter]: For program point idFINAL(lines 4 7) no Hoare annotation was computed. [2018-12-09 16:30:36,731 INFO L448 ceAbstractionStarter]: For program point idEXIT(lines 4 7) no Hoare annotation was computed. [2018-12-09 16:30:36,731 INFO L451 ceAbstractionStarter]: At program point idENTRY(lines 4 7) the Hoare annotation is: true [2018-12-09 16:30:36,731 INFO L444 ceAbstractionStarter]: At program point L6(line 6) the Hoare annotation is: (and (<= |id_#in~x| id_~x) (<= id_~x |id_#in~x|)) [2018-12-09 16:30:36,731 INFO L448 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2018-12-09 16:30:36,731 INFO L448 ceAbstractionStarter]: For program point L6-1(line 6) no Hoare annotation was computed. [2018-12-09 16:30:36,733 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 04:30:36 BoogieIcfgContainer [2018-12-09 16:30:36,733 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-09 16:30:36,733 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-09 16:30:36,733 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-09 16:30:36,733 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-09 16:30:36,733 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 04:30:26" (3/4) ... [2018-12-09 16:30:36,735 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-12-09 16:30:36,739 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-12-09 16:30:36,739 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-12-09 16:30:36,739 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure id [2018-12-09 16:30:36,741 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-12-09 16:30:36,741 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-12-09 16:30:36,741 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-12-09 16:30:36,762 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_5b558b36-dd6a-455d-9439-6ff62d132e77/bin-2019/utaipan/witness.graphml [2018-12-09 16:30:36,762 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-09 16:30:36,763 INFO L168 Benchmark]: Toolchain (without parser) took 10116.36 ms. Allocated memory was 1.0 GB in the beginning and 1.4 GB in the end (delta: 420.0 MB). Free memory was 958.8 MB in the beginning and 1.1 GB in the end (delta: -120.8 MB). Peak memory consumption was 299.1 MB. Max. memory is 11.5 GB. [2018-12-09 16:30:36,764 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 16:30:36,764 INFO L168 Benchmark]: CACSL2BoogieTranslator took 121.59 ms. Allocated memory is still 1.0 GB. Free memory was 958.8 MB in the beginning and 948.1 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-12-09 16:30:36,764 INFO L168 Benchmark]: Boogie Procedure Inliner took 11.40 ms. Allocated memory is still 1.0 GB. Free memory is still 948.1 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 16:30:36,764 INFO L168 Benchmark]: Boogie Preprocessor took 9.95 ms. Allocated memory is still 1.0 GB. Free memory is still 948.1 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 16:30:36,764 INFO L168 Benchmark]: RCFGBuilder took 145.24 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 127.4 MB). Free memory was 948.1 MB in the beginning and 1.1 GB in the end (delta: -159.8 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. [2018-12-09 16:30:36,765 INFO L168 Benchmark]: TraceAbstraction took 9795.93 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 292.6 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 28.3 MB). Peak memory consumption was 320.8 MB. Max. memory is 11.5 GB. [2018-12-09 16:30:36,765 INFO L168 Benchmark]: Witness Printer took 29.59 ms. Allocated memory is still 1.4 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 16:30:36,766 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 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 121.59 ms. Allocated memory is still 1.0 GB. Free memory was 958.8 MB in the beginning and 948.1 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 11.40 ms. Allocated memory is still 1.0 GB. Free memory is still 948.1 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 9.95 ms. Allocated memory is still 1.0 GB. Free memory is still 948.1 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 145.24 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 127.4 MB). Free memory was 948.1 MB in the beginning and 1.1 GB in the end (delta: -159.8 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 9795.93 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 292.6 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 28.3 MB). Peak memory consumption was 320.8 MB. Max. memory is 11.5 GB. * Witness Printer took 29.59 ms. Allocated memory is still 1.4 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 13]: 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 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. SAFE Result, 9.7s OverallTime, 12 OverallIterations, 12 TraceHistogramMax, 0.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 200 SDtfs, 167 SDslu, 1356 SDs, 0 SdLazy, 791 SolverSat, 13 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1169 GetRequests, 815 SyntacticMatches, 113 SemanticMatches, 241 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1124 ImplicationChecksByTransitivity, 1.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=48occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.1s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 12 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 9 PreInvPairs, 9 NumberOfFragments, 19 HoareAnnotationTreeSize, 9 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 8.2s InterpolantComputationTime, 1012 NumberOfCodeBlocks, 991 NumberOfCodeBlocksAsserted, 37 NumberOfCheckSat, 1440 ConstructedInterpolants, 0 QuantifiedInterpolants, 225336 SizeOfPredicates, 64 NumberOfNonLiveVariables, 996 ConjunctsInSsa, 173 ConjunctsInUnsatCore, 32 InterpolantComputations, 2 PerfectInterpolantSequences, 1904/4004 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...