./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_2calls_8_true-unreach-call_true-termination.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aa418289 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_3d186492-92cd-4aff-95f1-6bcd8c7174a3/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_3d186492-92cd-4aff-95f1-6bcd8c7174a3/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_3d186492-92cd-4aff-95f1-6bcd8c7174a3/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_3d186492-92cd-4aff-95f1-6bcd8c7174a3/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_2calls_8_true-unreach-call_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_3d186492-92cd-4aff-95f1-6bcd8c7174a3/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_3d186492-92cd-4aff-95f1-6bcd8c7174a3/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 cd6d4490a7412402195d3193de0347508566f7c8 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-aa41828 [2018-11-22 23:11:04,459 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-22 23:11:04,460 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-22 23:11:04,467 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-22 23:11:04,467 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-22 23:11:04,467 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-22 23:11:04,468 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-22 23:11:04,469 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-22 23:11:04,471 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-22 23:11:04,471 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-22 23:11:04,472 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-22 23:11:04,472 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-22 23:11:04,473 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-22 23:11:04,473 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-22 23:11:04,474 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-22 23:11:04,475 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-22 23:11:04,475 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-22 23:11:04,476 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-22 23:11:04,478 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-22 23:11:04,479 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-22 23:11:04,480 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-22 23:11:04,480 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-22 23:11:04,482 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-22 23:11:04,482 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-22 23:11:04,482 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-22 23:11:04,483 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-22 23:11:04,483 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-22 23:11:04,484 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-22 23:11:04,485 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-22 23:11:04,485 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-22 23:11:04,485 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-22 23:11:04,486 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-22 23:11:04,486 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-22 23:11:04,486 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-22 23:11:04,487 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-22 23:11:04,487 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-22 23:11:04,488 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_3d186492-92cd-4aff-95f1-6bcd8c7174a3/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-11-22 23:11:04,497 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-22 23:11:04,497 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-22 23:11:04,498 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-22 23:11:04,498 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-11-22 23:11:04,498 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-22 23:11:04,498 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-22 23:11:04,499 INFO L133 SettingsManager]: * Explicit value domain=true [2018-11-22 23:11:04,499 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-22 23:11:04,499 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-22 23:11:04,499 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-22 23:11:04,499 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-22 23:11:04,499 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-22 23:11:04,500 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-22 23:11:04,500 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-22 23:11:04,500 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-22 23:11:04,500 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-22 23:11:04,501 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-22 23:11:04,501 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-22 23:11:04,501 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-22 23:11:04,501 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-22 23:11:04,501 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-22 23:11:04,501 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-22 23:11:04,501 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-22 23:11:04,502 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-22 23:11:04,502 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-22 23:11:04,502 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-22 23:11:04,502 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-22 23:11:04,502 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-22 23:11:04,502 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-22 23:11:04,503 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-22 23:11:04,503 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-22 23:11:04,503 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-22 23:11:04,503 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-22 23:11:04,503 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-22 23:11:04,503 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-22 23:11:04,503 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-22 23:11:04,504 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-22 23:11:04,504 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_3d186492-92cd-4aff-95f1-6bcd8c7174a3/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 -> cd6d4490a7412402195d3193de0347508566f7c8 [2018-11-22 23:11:04,523 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-22 23:11:04,531 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-22 23:11:04,534 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-22 23:11:04,535 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-22 23:11:04,535 INFO L276 PluginConnector]: CDTParser initialized [2018-11-22 23:11:04,536 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_3d186492-92cd-4aff-95f1-6bcd8c7174a3/bin-2019/utaipan/../../sv-benchmarks/c/recursive-simple/fibo_2calls_8_true-unreach-call_true-termination.c [2018-11-22 23:11:04,570 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_3d186492-92cd-4aff-95f1-6bcd8c7174a3/bin-2019/utaipan/data/6c30d6b85/64c1bcd0177949e691359b72399d2de1/FLAGc07f3aac6 [2018-11-22 23:11:04,951 INFO L307 CDTParser]: Found 1 translation units. [2018-11-22 23:11:04,951 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_3d186492-92cd-4aff-95f1-6bcd8c7174a3/sv-benchmarks/c/recursive-simple/fibo_2calls_8_true-unreach-call_true-termination.c [2018-11-22 23:11:04,955 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_3d186492-92cd-4aff-95f1-6bcd8c7174a3/bin-2019/utaipan/data/6c30d6b85/64c1bcd0177949e691359b72399d2de1/FLAGc07f3aac6 [2018-11-22 23:11:04,963 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_3d186492-92cd-4aff-95f1-6bcd8c7174a3/bin-2019/utaipan/data/6c30d6b85/64c1bcd0177949e691359b72399d2de1 [2018-11-22 23:11:04,965 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-22 23:11:04,966 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-22 23:11:04,967 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-22 23:11:04,967 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-22 23:11:04,969 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-22 23:11:04,970 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 11:11:04" (1/1) ... [2018-11-22 23:11:04,972 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4aa3a850 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 11:11:04, skipping insertion in model container [2018-11-22 23:11:04,972 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 11:11:04" (1/1) ... [2018-11-22 23:11:04,980 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-22 23:11:04,991 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-22 23:11:05,097 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-22 23:11:05,100 INFO L191 MainTranslator]: Completed pre-run [2018-11-22 23:11:05,110 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-22 23:11:05,117 INFO L195 MainTranslator]: Completed translation [2018-11-22 23:11:05,118 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 11:11:05 WrapperNode [2018-11-22 23:11:05,118 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-22 23:11:05,118 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-22 23:11:05,118 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-22 23:11:05,118 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-22 23:11:05,125 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 11:11:05" (1/1) ... [2018-11-22 23:11:05,130 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 11:11:05" (1/1) ... [2018-11-22 23:11:05,135 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-22 23:11:05,135 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-22 23:11:05,135 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-22 23:11:05,135 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-22 23:11:05,143 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 11:11:05" (1/1) ... [2018-11-22 23:11:05,143 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 11:11:05" (1/1) ... [2018-11-22 23:11:05,144 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 11:11:05" (1/1) ... [2018-11-22 23:11:05,144 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 11:11:05" (1/1) ... [2018-11-22 23:11:05,147 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 11:11:05" (1/1) ... [2018-11-22 23:11:05,148 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 11:11:05" (1/1) ... [2018-11-22 23:11:05,149 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 11:11:05" (1/1) ... [2018-11-22 23:11:05,150 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-22 23:11:05,150 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-22 23:11:05,150 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-22 23:11:05,151 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-22 23:11:05,151 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 11:11:05" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3d186492-92cd-4aff-95f1-6bcd8c7174a3/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 [2018-11-22 23:11:05,221 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-22 23:11:05,221 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-22 23:11:05,221 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-22 23:11:05,222 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-22 23:11:05,222 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-22 23:11:05,222 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-22 23:11:05,222 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2018-11-22 23:11:05,222 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2018-11-22 23:11:05,222 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2018-11-22 23:11:05,222 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2018-11-22 23:11:05,372 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-22 23:11:05,372 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-11-22 23:11:05,373 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 11:11:05 BoogieIcfgContainer [2018-11-22 23:11:05,373 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-22 23:11:05,373 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-22 23:11:05,373 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-22 23:11:05,375 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-22 23:11:05,375 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 11:11:04" (1/3) ... [2018-11-22 23:11:05,376 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24aba990 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 11:11:05, skipping insertion in model container [2018-11-22 23:11:05,376 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 11:11:05" (2/3) ... [2018-11-22 23:11:05,377 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24aba990 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 11:11:05, skipping insertion in model container [2018-11-22 23:11:05,377 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 11:11:05" (3/3) ... [2018-11-22 23:11:05,380 INFO L112 eAbstractionObserver]: Analyzing ICFG fibo_2calls_8_true-unreach-call_true-termination.c [2018-11-22 23:11:05,388 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-22 23:11:05,393 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-22 23:11:05,405 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-22 23:11:05,431 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-22 23:11:05,431 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-22 23:11:05,432 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-22 23:11:05,432 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-22 23:11:05,432 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-22 23:11:05,432 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-22 23:11:05,432 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-22 23:11:05,432 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-22 23:11:05,449 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2018-11-22 23:11:05,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-22 23:11:05,454 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 23:11:05,454 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 23:11:05,456 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 23:11:05,460 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 23:11:05,460 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2018-11-22 23:11:05,462 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-22 23:11:05,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:11:05,500 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 23:11:05,500 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:11:05,500 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-22 23:11:05,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 23:11:05,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 23:11:05,592 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-22 23:11:05,593 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-22 23:11:05,593 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-22 23:11:05,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-22 23:11:05,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-22 23:11:05,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-22 23:11:05,609 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2018-11-22 23:11:05,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 23:11:05,674 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2018-11-22 23:11:05,674 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-22 23:11:05,675 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-11-22 23:11:05,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 23:11:05,681 INFO L225 Difference]: With dead ends: 44 [2018-11-22 23:11:05,681 INFO L226 Difference]: Without dead ends: 30 [2018-11-22 23:11:05,683 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 [2018-11-22 23:11:05,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-11-22 23:11:05,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-11-22 23:11:05,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-11-22 23:11:05,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2018-11-22 23:11:05,711 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2018-11-22 23:11:05,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 23:11:05,711 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2018-11-22 23:11:05,711 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-22 23:11:05,712 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2018-11-22 23:11:05,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-11-22 23:11:05,713 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 23:11:05,713 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 23:11:05,713 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 23:11:05,713 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 23:11:05,714 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2018-11-22 23:11:05,714 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-22 23:11:05,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:11:05,715 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 23:11:05,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:11:05,715 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-22 23:11:05,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 23:11:05,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 23:11:05,757 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-22 23:11:05,757 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-22 23:11:05,757 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-22 23:11:05,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-22 23:11:05,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-22 23:11:05,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-22 23:11:05,759 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2018-11-22 23:11:05,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 23:11:05,809 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2018-11-22 23:11:05,810 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-22 23:11:05,810 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2018-11-22 23:11:05,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 23:11:05,811 INFO L225 Difference]: With dead ends: 36 [2018-11-22 23:11:05,811 INFO L226 Difference]: Without dead ends: 32 [2018-11-22 23:11:05,812 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 [2018-11-22 23:11:05,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-11-22 23:11:05,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2018-11-22 23:11:05,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-11-22 23:11:05,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2018-11-22 23:11:05,817 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2018-11-22 23:11:05,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 23:11:05,818 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2018-11-22 23:11:05,818 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-22 23:11:05,818 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2018-11-22 23:11:05,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-11-22 23:11:05,819 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 23:11:05,819 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 23:11:05,819 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 23:11:05,819 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 23:11:05,819 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2018-11-22 23:11:05,820 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-22 23:11:05,820 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:11:05,821 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 23:11:05,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:11:05,821 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-22 23:11:05,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 23:11:05,889 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-22 23:11:05,890 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 23:11:05,890 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-22 23:11:05,891 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 27 with the following transitions: [2018-11-22 23:11:05,892 INFO L202 CegarAbsIntRunner]: [0], [4], [6], [9], [11], [18], [21], [31], [32], [36], [40], [42], [44], [45], [46], [47], [48], [50], [51], [56], [57], [58], [59] [2018-11-22 23:11:05,915 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-22 23:11:05,916 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-22 23:11:05,990 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-22 23:11:05,991 INFO L272 AbstractInterpreter]: Visited 12 different actions 12 times. Never merged. Never widened. Performed 15 root evaluator evaluations with a maximum evaluation depth of 3. Performed 15 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Never found a fixpoint. Largest state had 5 variables. [2018-11-22 23:11:05,995 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 23:11:05,996 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-22 23:11:06,036 INFO L227 lantSequenceWeakener]: Weakened 4 states. On average, predicates are now at 50% of their original sizes. [2018-11-22 23:11:06,036 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-22 23:11:06,063 INFO L415 sIntCurrentIteration]: We unified 25 AI predicates to 25 [2018-11-22 23:11:06,063 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-22 23:11:06,064 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-22 23:11:06,064 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 11 [2018-11-22 23:11:06,064 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-22 23:11:06,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-22 23:11:06,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-22 23:11:06,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-11-22 23:11:06,065 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 7 states. [2018-11-22 23:11:06,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 23:11:06,216 INFO L93 Difference]: Finished difference Result 72 states and 95 transitions. [2018-11-22 23:11:06,216 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-22 23:11:06,216 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2018-11-22 23:11:06,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 23:11:06,217 INFO L225 Difference]: With dead ends: 72 [2018-11-22 23:11:06,217 INFO L226 Difference]: Without dead ends: 48 [2018-11-22 23:11:06,218 INFO L631 BasicCegarLoop]: 2 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2018-11-22 23:11:06,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-11-22 23:11:06,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2018-11-22 23:11:06,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-11-22 23:11:06,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2018-11-22 23:11:06,224 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 26 [2018-11-22 23:11:06,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 23:11:06,224 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2018-11-22 23:11:06,224 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-22 23:11:06,224 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2018-11-22 23:11:06,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-11-22 23:11:06,225 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 23:11:06,226 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 23:11:06,226 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 23:11:06,226 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 23:11:06,226 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2018-11-22 23:11:06,226 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-22 23:11:06,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:11:06,227 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 23:11:06,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:11:06,227 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-22 23:11:06,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 23:11:06,283 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-11-22 23:11:06,284 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 23:11:06,284 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-22 23:11:06,284 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 40 with the following transitions: [2018-11-22 23:11:06,284 INFO L202 CegarAbsIntRunner]: [0], [4], [6], [9], [11], [18], [21], [22], [26], [28], [30], [31], [32], [35], [36], [40], [42], [44], [45], [46], [47], [48], [50], [51], [52], [53], [54], [55], [56], [57], [58], [59] [2018-11-22 23:11:06,286 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-22 23:11:06,286 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-22 23:11:06,402 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-22 23:11:06,402 INFO L272 AbstractInterpreter]: Visited 28 different actions 313 times. Never merged. Widened at 2 different actions 18 times. Performed 647 root evaluator evaluations with a maximum evaluation depth of 4. Performed 647 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 29 fixpoints after 6 different actions. Largest state had 5 variables. [2018-11-22 23:11:06,404 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 23:11:06,404 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-22 23:11:06,416 INFO L227 lantSequenceWeakener]: Weakened 7 states. On average, predicates are now at 50% of their original sizes. [2018-11-22 23:11:06,416 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-22 23:11:06,446 INFO L415 sIntCurrentIteration]: We unified 38 AI predicates to 38 [2018-11-22 23:11:06,446 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-22 23:11:06,446 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-22 23:11:06,446 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [6] total 13 [2018-11-22 23:11:06,446 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-22 23:11:06,447 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-22 23:11:06,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-22 23:11:06,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-11-22 23:11:06,447 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand 9 states. [2018-11-22 23:11:06,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 23:11:06,692 INFO L93 Difference]: Finished difference Result 87 states and 106 transitions. [2018-11-22 23:11:06,692 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-22 23:11:06,692 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 39 [2018-11-22 23:11:06,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 23:11:06,693 INFO L225 Difference]: With dead ends: 87 [2018-11-22 23:11:06,694 INFO L226 Difference]: Without dead ends: 55 [2018-11-22 23:11:06,694 INFO L631 BasicCegarLoop]: 2 DeclaredPredicates, 41 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2018-11-22 23:11:06,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-11-22 23:11:06,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-11-22 23:11:06,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-11-22 23:11:06,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2018-11-22 23:11:06,702 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 39 [2018-11-22 23:11:06,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 23:11:06,702 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2018-11-22 23:11:06,702 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-22 23:11:06,702 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2018-11-22 23:11:06,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-11-22 23:11:06,704 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 23:11:06,704 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 23:11:06,704 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 23:11:06,704 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 23:11:06,705 INFO L82 PathProgramCache]: Analyzing trace with hash -209212298, now seen corresponding path program 2 times [2018-11-22 23:11:06,705 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-22 23:11:06,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:11:06,705 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 23:11:06,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:11:06,705 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-22 23:11:06,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 23:11:06,756 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2018-11-22 23:11:06,756 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 23:11:06,756 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-22 23:11:06,757 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-22 23:11:06,757 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-22 23:11:06,757 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 23:11:06,758 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3d186492-92cd-4aff-95f1-6bcd8c7174a3/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 [2018-11-22 23:11:06,769 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-22 23:11:06,770 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-22 23:11:06,787 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-11-22 23:11:06,787 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 23:11:06,793 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 23:11:06,856 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-11-22 23:11:06,856 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-22 23:11:07,111 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-11-22 23:11:07,125 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-22 23:11:07,126 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 9] total 15 [2018-11-22 23:11:07,126 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-22 23:11:07,126 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-22 23:11:07,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-22 23:11:07,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2018-11-22 23:11:07,127 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand 11 states. [2018-11-22 23:11:07,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 23:11:07,285 INFO L93 Difference]: Finished difference Result 121 states and 177 transitions. [2018-11-22 23:11:07,286 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-22 23:11:07,286 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 52 [2018-11-22 23:11:07,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 23:11:07,288 INFO L225 Difference]: With dead ends: 121 [2018-11-22 23:11:07,288 INFO L226 Difference]: Without dead ends: 76 [2018-11-22 23:11:07,289 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 92 SyntacticMatches, 7 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2018-11-22 23:11:07,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-11-22 23:11:07,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 59. [2018-11-22 23:11:07,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-11-22 23:11:07,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 70 transitions. [2018-11-22 23:11:07,300 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 70 transitions. Word has length 52 [2018-11-22 23:11:07,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 23:11:07,300 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 70 transitions. [2018-11-22 23:11:07,300 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-22 23:11:07,300 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 70 transitions. [2018-11-22 23:11:07,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-11-22 23:11:07,302 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 23:11:07,302 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 23:11:07,302 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 23:11:07,302 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 23:11:07,303 INFO L82 PathProgramCache]: Analyzing trace with hash -242988780, now seen corresponding path program 1 times [2018-11-22 23:11:07,303 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-22 23:11:07,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:11:07,304 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 23:11:07,304 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:11:07,304 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-22 23:11:07,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 23:11:07,381 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 18 proven. 5 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2018-11-22 23:11:07,381 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 23:11:07,381 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-22 23:11:07,381 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 56 with the following transitions: [2018-11-22 23:11:07,382 INFO L202 CegarAbsIntRunner]: [0], [4], [6], [9], [11], [18], [21], [22], [25], [26], [28], [30], [31], [32], [36], [39], [40], [42], [44], [45], [46], [47], [48], [50], [51], [52], [53], [54], [55], [56], [57], [58], [59] [2018-11-22 23:11:07,383 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-22 23:11:07,383 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-22 23:11:08,412 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-22 23:11:08,413 INFO L272 AbstractInterpreter]: Visited 29 different actions 4700 times. Merged at 11 different actions 1218 times. Widened at 2 different actions 234 times. Performed 10886 root evaluator evaluations with a maximum evaluation depth of 4. Performed 10886 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 580 fixpoints after 9 different actions. Largest state had 5 variables. [2018-11-22 23:11:08,426 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 23:11:08,426 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-22 23:11:08,438 INFO L227 lantSequenceWeakener]: Weakened 11 states. On average, predicates are now at 50% of their original sizes. [2018-11-22 23:11:08,438 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-22 23:11:08,535 INFO L415 sIntCurrentIteration]: We unified 54 AI predicates to 54 [2018-11-22 23:11:08,536 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-22 23:11:08,536 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-22 23:11:08,536 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [7] total 16 [2018-11-22 23:11:08,536 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-22 23:11:08,536 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-22 23:11:08,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-22 23:11:08,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-11-22 23:11:08,537 INFO L87 Difference]: Start difference. First operand 59 states and 70 transitions. Second operand 11 states. [2018-11-22 23:11:08,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 23:11:08,856 INFO L93 Difference]: Finished difference Result 109 states and 136 transitions. [2018-11-22 23:11:08,856 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-22 23:11:08,857 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 55 [2018-11-22 23:11:08,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 23:11:08,857 INFO L225 Difference]: With dead ends: 109 [2018-11-22 23:11:08,858 INFO L226 Difference]: Without dead ends: 68 [2018-11-22 23:11:08,858 INFO L631 BasicCegarLoop]: 2 DeclaredPredicates, 58 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2018-11-22 23:11:08,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-11-22 23:11:08,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-11-22 23:11:08,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-11-22 23:11:08,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 82 transitions. [2018-11-22 23:11:08,866 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 82 transitions. Word has length 55 [2018-11-22 23:11:08,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 23:11:08,866 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 82 transitions. [2018-11-22 23:11:08,866 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-22 23:11:08,866 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 82 transitions. [2018-11-22 23:11:08,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-11-22 23:11:08,868 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 23:11:08,868 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 23:11:08,868 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 23:11:08,868 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 23:11:08,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1768644787, now seen corresponding path program 1 times [2018-11-22 23:11:08,869 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-22 23:11:08,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:11:08,869 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 23:11:08,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:11:08,870 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-22 23:11:08,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 23:11:08,918 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 16 proven. 15 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2018-11-22 23:11:08,918 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 23:11:08,918 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-22 23:11:08,919 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 68 with the following transitions: [2018-11-22 23:11:08,919 INFO L202 CegarAbsIntRunner]: [0], [4], [6], [9], [11], [18], [21], [22], [25], [26], [28], [30], [31], [32], [35], [36], [39], [40], [42], [44], [45], [46], [47], [48], [50], [51], [52], [53], [54], [55], [56], [57], [58], [59] [2018-11-22 23:11:08,920 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-22 23:11:08,920 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-22 23:11:16,783 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-22 23:11:16,783 INFO L272 AbstractInterpreter]: Visited 34 different actions 66811 times. Merged at 16 different actions 20941 times. Widened at 4 different actions 2001 times. Performed 164403 root evaluator evaluations with a maximum evaluation depth of 4. Performed 164403 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 9083 fixpoints after 10 different actions. Largest state had 5 variables. [2018-11-22 23:11:16,789 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 23:11:16,790 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-22 23:11:16,790 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 23:11:16,790 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3d186492-92cd-4aff-95f1-6bcd8c7174a3/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 [2018-11-22 23:11:16,795 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 23:11:16,796 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-22 23:11:16,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 23:11:16,812 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 23:11:16,874 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 8 proven. 40 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2018-11-22 23:11:16,874 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-22 23:11:17,352 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 8 proven. 48 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2018-11-22 23:11:17,374 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-22 23:11:17,374 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10, 13] total 18 [2018-11-22 23:11:17,374 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-22 23:11:17,374 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-22 23:11:17,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-22 23:11:17,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2018-11-22 23:11:17,375 INFO L87 Difference]: Start difference. First operand 68 states and 82 transitions. Second operand 12 states. [2018-11-22 23:11:17,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 23:11:17,597 INFO L93 Difference]: Finished difference Result 144 states and 218 transitions. [2018-11-22 23:11:17,598 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-22 23:11:17,598 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 67 [2018-11-22 23:11:17,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 23:11:17,599 INFO L225 Difference]: With dead ends: 144 [2018-11-22 23:11:17,599 INFO L226 Difference]: Without dead ends: 95 [2018-11-22 23:11:17,600 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 117 SyntacticMatches, 11 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2018-11-22 23:11:17,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-11-22 23:11:17,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 70. [2018-11-22 23:11:17,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-11-22 23:11:17,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 84 transitions. [2018-11-22 23:11:17,611 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 84 transitions. Word has length 67 [2018-11-22 23:11:17,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 23:11:17,611 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 84 transitions. [2018-11-22 23:11:17,611 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-22 23:11:17,611 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 84 transitions. [2018-11-22 23:11:17,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-11-22 23:11:17,612 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 23:11:17,613 INFO L402 BasicCegarLoop]: trace histogram [7, 7, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 23:11:17,613 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 23:11:17,613 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 23:11:17,613 INFO L82 PathProgramCache]: Analyzing trace with hash 650896746, now seen corresponding path program 1 times [2018-11-22 23:11:17,613 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-22 23:11:17,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:11:17,614 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 23:11:17,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:11:17,614 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-22 23:11:17,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 23:11:17,703 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 39 proven. 39 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2018-11-22 23:11:17,703 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 23:11:17,703 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-22 23:11:17,703 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 82 with the following transitions: [2018-11-22 23:11:17,704 INFO L202 CegarAbsIntRunner]: [0], [4], [6], [9], [11], [18], [21], [22], [26], [28], [30], [31], [32], [35], [36], [39], [40], [42], [44], [45], [46], [47], [48], [50], [51], [52], [53], [54], [55], [56], [57], [58], [59] [2018-11-22 23:11:17,705 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-22 23:11:17,705 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-22 23:11:18,050 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-22 23:11:18,050 INFO L272 AbstractInterpreter]: Visited 29 different actions 3227 times. Merged at 11 different actions 856 times. Widened at 2 different actions 130 times. Performed 7980 root evaluator evaluations with a maximum evaluation depth of 4. Performed 7980 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 384 fixpoints after 9 different actions. Largest state had 5 variables. [2018-11-22 23:11:18,058 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 23:11:18,058 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-22 23:11:18,069 INFO L227 lantSequenceWeakener]: Weakened 19 states. On average, predicates are now at 55.26% of their original sizes. [2018-11-22 23:11:18,069 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-22 23:11:18,123 INFO L415 sIntCurrentIteration]: We unified 80 AI predicates to 80 [2018-11-22 23:11:18,123 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-22 23:11:18,123 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-22 23:11:18,123 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [15] imperfect sequences [11] total 24 [2018-11-22 23:11:18,123 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-22 23:11:18,123 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-22 23:11:18,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-22 23:11:18,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-11-22 23:11:18,124 INFO L87 Difference]: Start difference. First operand 70 states and 84 transitions. Second operand 15 states. [2018-11-22 23:11:18,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 23:11:18,463 INFO L93 Difference]: Finished difference Result 136 states and 177 transitions. [2018-11-22 23:11:18,463 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-22 23:11:18,463 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 81 [2018-11-22 23:11:18,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 23:11:18,464 INFO L225 Difference]: With dead ends: 136 [2018-11-22 23:11:18,464 INFO L226 Difference]: Without dead ends: 88 [2018-11-22 23:11:18,464 INFO L631 BasicCegarLoop]: 2 DeclaredPredicates, 90 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2018-11-22 23:11:18,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-11-22 23:11:18,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-11-22 23:11:18,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-11-22 23:11:18,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 109 transitions. [2018-11-22 23:11:18,471 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 109 transitions. Word has length 81 [2018-11-22 23:11:18,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 23:11:18,471 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 109 transitions. [2018-11-22 23:11:18,471 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-22 23:11:18,471 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 109 transitions. [2018-11-22 23:11:18,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-11-22 23:11:18,473 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 23:11:18,473 INFO L402 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 23:11:18,473 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 23:11:18,473 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 23:11:18,473 INFO L82 PathProgramCache]: Analyzing trace with hash -1708632044, now seen corresponding path program 2 times [2018-11-22 23:11:18,473 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-22 23:11:18,474 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:11:18,474 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 23:11:18,474 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:11:18,474 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-22 23:11:18,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 23:11:18,569 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 68 proven. 48 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2018-11-22 23:11:18,569 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 23:11:18,569 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-22 23:11:18,569 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-22 23:11:18,570 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-22 23:11:18,570 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 23:11:18,570 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3d186492-92cd-4aff-95f1-6bcd8c7174a3/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 [2018-11-22 23:11:18,577 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-22 23:11:18,578 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-22 23:11:18,587 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-11-22 23:11:18,587 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 23:11:18,589 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 23:11:18,637 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 67 proven. 15 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2018-11-22 23:11:18,637 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-22 23:11:18,839 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 67 proven. 16 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2018-11-22 23:11:18,854 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-22 23:11:18,854 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 9] total 20 [2018-11-22 23:11:18,854 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-22 23:11:18,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-22 23:11:18,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-22 23:11:18,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2018-11-22 23:11:18,855 INFO L87 Difference]: Start difference. First operand 88 states and 109 transitions. Second operand 16 states. [2018-11-22 23:11:19,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 23:11:19,149 INFO L93 Difference]: Finished difference Result 218 states and 340 transitions. [2018-11-22 23:11:19,149 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-11-22 23:11:19,149 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 108 [2018-11-22 23:11:19,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 23:11:19,150 INFO L225 Difference]: With dead ends: 218 [2018-11-22 23:11:19,150 INFO L226 Difference]: Without dead ends: 147 [2018-11-22 23:11:19,151 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 202 SyntacticMatches, 6 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=882, Unknown=0, NotChecked=0, Total=1056 [2018-11-22 23:11:19,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-11-22 23:11:19,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 117. [2018-11-22 23:11:19,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-11-22 23:11:19,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 166 transitions. [2018-11-22 23:11:19,160 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 166 transitions. Word has length 108 [2018-11-22 23:11:19,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 23:11:19,161 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 166 transitions. [2018-11-22 23:11:19,161 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-22 23:11:19,161 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 166 transitions. [2018-11-22 23:11:19,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-11-22 23:11:19,162 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 23:11:19,162 INFO L402 BasicCegarLoop]: trace histogram [16, 16, 11, 11, 10, 9, 8, 8, 8, 8, 8, 8, 8, 7, 5, 5, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 23:11:19,162 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 23:11:19,163 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 23:11:19,163 INFO L82 PathProgramCache]: Analyzing trace with hash -1764149606, now seen corresponding path program 3 times [2018-11-22 23:11:19,163 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-22 23:11:19,163 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:11:19,163 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 23:11:19,164 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:11:19,164 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-22 23:11:19,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 23:11:19,266 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 187 proven. 21 refuted. 0 times theorem prover too weak. 725 trivial. 0 not checked. [2018-11-22 23:11:19,266 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 23:11:19,267 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-22 23:11:19,267 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-22 23:11:19,267 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-22 23:11:19,267 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 23:11:19,267 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3d186492-92cd-4aff-95f1-6bcd8c7174a3/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 [2018-11-22 23:11:19,275 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-22 23:11:19,275 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-11-22 23:11:19,310 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-22 23:11:19,310 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 23:11:19,313 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 23:11:19,445 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 55 proven. 281 refuted. 0 times theorem prover too weak. 597 trivial. 0 not checked. [2018-11-22 23:11:19,445 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-22 23:11:20,157 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 55 proven. 297 refuted. 0 times theorem prover too weak. 581 trivial. 0 not checked. [2018-11-22 23:11:20,172 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-22 23:11:20,172 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 15] total 24 [2018-11-22 23:11:20,172 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-22 23:11:20,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-22 23:11:20,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-22 23:11:20,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2018-11-22 23:11:20,173 INFO L87 Difference]: Start difference. First operand 117 states and 166 transitions. Second operand 17 states. [2018-11-22 23:11:20,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 23:11:20,497 INFO L93 Difference]: Finished difference Result 319 states and 576 transitions. [2018-11-22 23:11:20,497 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-11-22 23:11:20,497 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 188 [2018-11-22 23:11:20,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 23:11:20,500 INFO L225 Difference]: With dead ends: 319 [2018-11-22 23:11:20,500 INFO L226 Difference]: Without dead ends: 194 [2018-11-22 23:11:20,502 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 350 SyntacticMatches, 12 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=226, Invalid=1106, Unknown=0, NotChecked=0, Total=1332 [2018-11-22 23:11:20,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2018-11-22 23:11:20,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 135. [2018-11-22 23:11:20,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-11-22 23:11:20,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 198 transitions. [2018-11-22 23:11:20,519 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 198 transitions. Word has length 188 [2018-11-22 23:11:20,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 23:11:20,520 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 198 transitions. [2018-11-22 23:11:20,520 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-22 23:11:20,520 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 198 transitions. [2018-11-22 23:11:20,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2018-11-22 23:11:20,522 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 23:11:20,522 INFO L402 BasicCegarLoop]: trace histogram [20, 20, 17, 17, 16, 14, 10, 10, 10, 10, 10, 10, 10, 8, 8, 8, 8, 8, 8, 8, 8, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 23:11:20,522 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 23:11:20,522 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 23:11:20,522 INFO L82 PathProgramCache]: Analyzing trace with hash -321275333, now seen corresponding path program 4 times [2018-11-22 23:11:20,523 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-22 23:11:20,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:11:20,523 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 23:11:20,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:11:20,523 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-22 23:11:20,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 23:11:20,625 INFO L134 CoverageAnalysis]: Checked inductivity of 1807 backedges. 205 proven. 196 refuted. 0 times theorem prover too weak. 1406 trivial. 0 not checked. [2018-11-22 23:11:20,625 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 23:11:20,625 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-22 23:11:20,625 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-22 23:11:20,625 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-22 23:11:20,625 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 23:11:20,625 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3d186492-92cd-4aff-95f1-6bcd8c7174a3/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 [2018-11-22 23:11:20,637 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 23:11:20,637 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-22 23:11:20,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 23:11:20,700 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 23:11:20,926 INFO L134 CoverageAnalysis]: Checked inductivity of 1807 backedges. 99 proven. 469 refuted. 0 times theorem prover too weak. 1239 trivial. 0 not checked. [2018-11-22 23:11:20,926 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-22 23:11:22,038 INFO L134 CoverageAnalysis]: Checked inductivity of 1807 backedges. 99 proven. 493 refuted. 0 times theorem prover too weak. 1215 trivial. 0 not checked. [2018-11-22 23:11:22,062 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-22 23:11:22,062 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 12, 17] total 23 [2018-11-22 23:11:22,062 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-22 23:11:22,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-22 23:11:22,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-22 23:11:22,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2018-11-22 23:11:22,063 INFO L87 Difference]: Start difference. First operand 135 states and 198 transitions. Second operand 16 states. [2018-11-22 23:11:22,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 23:11:22,385 INFO L93 Difference]: Finished difference Result 356 states and 720 transitions. [2018-11-22 23:11:22,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-11-22 23:11:22,386 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 259 [2018-11-22 23:11:22,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 23:11:22,388 INFO L225 Difference]: With dead ends: 356 [2018-11-22 23:11:22,388 INFO L226 Difference]: Without dead ends: 210 [2018-11-22 23:11:22,389 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 536 GetRequests, 488 SyntacticMatches, 15 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=226, Invalid=964, Unknown=0, NotChecked=0, Total=1190 [2018-11-22 23:11:22,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2018-11-22 23:11:22,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 149. [2018-11-22 23:11:22,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-11-22 23:11:22,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 223 transitions. [2018-11-22 23:11:22,403 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 223 transitions. Word has length 259 [2018-11-22 23:11:22,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 23:11:22,403 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 223 transitions. [2018-11-22 23:11:22,403 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-22 23:11:22,403 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 223 transitions. [2018-11-22 23:11:22,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2018-11-22 23:11:22,408 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 23:11:22,409 INFO L402 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 20, 20, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 8, 7, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 23:11:22,409 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 23:11:22,409 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 23:11:22,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1869550042, now seen corresponding path program 5 times [2018-11-22 23:11:22,409 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-22 23:11:22,410 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:11:22,410 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 23:11:22,410 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:11:22,410 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-22 23:11:22,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 23:11:22,534 INFO L134 CoverageAnalysis]: Checked inductivity of 3456 backedges. 286 proven. 418 refuted. 0 times theorem prover too weak. 2752 trivial. 0 not checked. [2018-11-22 23:11:22,534 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 23:11:22,534 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-22 23:11:22,534 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-22 23:11:22,535 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-22 23:11:22,535 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 23:11:22,535 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3d186492-92cd-4aff-95f1-6bcd8c7174a3/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 [2018-11-22 23:11:22,543 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-22 23:11:22,544 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-22 23:11:22,593 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-11-22 23:11:22,593 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 23:11:22,597 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 23:11:22,706 INFO L134 CoverageAnalysis]: Checked inductivity of 3456 backedges. 524 proven. 87 refuted. 0 times theorem prover too weak. 2845 trivial. 0 not checked. [2018-11-22 23:11:22,706 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-22 23:11:23,398 INFO L134 CoverageAnalysis]: Checked inductivity of 3456 backedges. 528 proven. 93 refuted. 0 times theorem prover too weak. 2835 trivial. 0 not checked. [2018-11-22 23:11:23,413 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-22 23:11:23,413 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 13] total 23 [2018-11-22 23:11:23,413 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-22 23:11:23,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-22 23:11:23,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-22 23:11:23,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2018-11-22 23:11:23,415 INFO L87 Difference]: Start difference. First operand 149 states and 223 transitions. Second operand 18 states. [2018-11-22 23:11:23,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 23:11:23,852 INFO L93 Difference]: Finished difference Result 333 states and 567 transitions. [2018-11-22 23:11:23,853 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-11-22 23:11:23,853 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 353 [2018-11-22 23:11:23,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 23:11:23,854 INFO L225 Difference]: With dead ends: 333 [2018-11-22 23:11:23,855 INFO L226 Difference]: Without dead ends: 209 [2018-11-22 23:11:23,856 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 735 GetRequests, 684 SyntacticMatches, 11 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=302, Invalid=1420, Unknown=0, NotChecked=0, Total=1722 [2018-11-22 23:11:23,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2018-11-22 23:11:23,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 181. [2018-11-22 23:11:23,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-11-22 23:11:23,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 266 transitions. [2018-11-22 23:11:23,868 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 266 transitions. Word has length 353 [2018-11-22 23:11:23,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 23:11:23,869 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 266 transitions. [2018-11-22 23:11:23,869 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-22 23:11:23,869 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 266 transitions. [2018-11-22 23:11:23,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 582 [2018-11-22 23:11:23,876 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 23:11:23,876 INFO L402 BasicCegarLoop]: trace histogram [45, 45, 40, 40, 32, 32, 22, 22, 22, 22, 22, 22, 22, 20, 20, 20, 20, 20, 20, 20, 13, 12, 10, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 23:11:23,876 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 23:11:23,876 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 23:11:23,876 INFO L82 PathProgramCache]: Analyzing trace with hash -510867245, now seen corresponding path program 6 times [2018-11-22 23:11:23,876 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-22 23:11:23,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:11:23,877 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 23:11:23,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:11:23,877 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-22 23:11:23,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 23:11:24,054 INFO L134 CoverageAnalysis]: Checked inductivity of 9756 backedges. 280 proven. 869 refuted. 0 times theorem prover too weak. 8607 trivial. 0 not checked. [2018-11-22 23:11:24,054 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 23:11:24,054 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-22 23:11:24,054 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-22 23:11:24,054 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-22 23:11:24,054 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 23:11:24,054 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3d186492-92cd-4aff-95f1-6bcd8c7174a3/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 [2018-11-22 23:11:24,062 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-22 23:11:24,062 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-11-22 23:11:24,137 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-22 23:11:24,137 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 23:11:24,147 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 23:11:24,368 INFO L134 CoverageAnalysis]: Checked inductivity of 9756 backedges. 261 proven. 1206 refuted. 0 times theorem prover too weak. 8289 trivial. 0 not checked. [2018-11-22 23:11:24,368 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-22 23:11:25,925 INFO L134 CoverageAnalysis]: Checked inductivity of 9756 backedges. 261 proven. 1227 refuted. 0 times theorem prover too weak. 8268 trivial. 0 not checked. [2018-11-22 23:11:25,940 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-22 23:11:25,940 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 17] total 24 [2018-11-22 23:11:25,940 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-22 23:11:25,941 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-22 23:11:25,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-22 23:11:25,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2018-11-22 23:11:25,942 INFO L87 Difference]: Start difference. First operand 181 states and 266 transitions. Second operand 17 states. [2018-11-22 23:11:26,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 23:11:26,248 INFO L93 Difference]: Finished difference Result 396 states and 709 transitions. [2018-11-22 23:11:26,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-11-22 23:11:26,248 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 581 [2018-11-22 23:11:26,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 23:11:26,251 INFO L225 Difference]: With dead ends: 396 [2018-11-22 23:11:26,251 INFO L226 Difference]: Without dead ends: 241 [2018-11-22 23:11:26,252 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1184 GetRequests, 1133 SyntacticMatches, 15 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=251, Invalid=1155, Unknown=0, NotChecked=0, Total=1406 [2018-11-22 23:11:26,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2018-11-22 23:11:26,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 172. [2018-11-22 23:11:26,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2018-11-22 23:11:26,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 242 transitions. [2018-11-22 23:11:26,270 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 242 transitions. Word has length 581 [2018-11-22 23:11:26,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 23:11:26,270 INFO L480 AbstractCegarLoop]: Abstraction has 172 states and 242 transitions. [2018-11-22 23:11:26,270 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-22 23:11:26,270 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 242 transitions. [2018-11-22 23:11:26,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2018-11-22 23:11:26,275 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 23:11:26,276 INFO L402 BasicCegarLoop]: trace histogram [27, 27, 24, 24, 22, 19, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 10, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 23:11:26,276 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 23:11:26,276 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 23:11:26,276 INFO L82 PathProgramCache]: Analyzing trace with hash -2066779636, now seen corresponding path program 7 times [2018-11-22 23:11:26,276 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-22 23:11:26,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:11:26,277 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 23:11:26,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:11:26,277 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-22 23:11:26,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 23:11:26,405 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 436 proven. 185 refuted. 0 times theorem prover too weak. 2865 trivial. 0 not checked. [2018-11-22 23:11:26,405 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 23:11:26,406 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-22 23:11:26,406 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-22 23:11:26,406 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-22 23:11:26,406 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 23:11:26,406 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3d186492-92cd-4aff-95f1-6bcd8c7174a3/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 [2018-11-22 23:11:26,415 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 23:11:26,415 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-22 23:11:26,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 23:11:26,463 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 23:11:26,532 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 246 proven. 484 refuted. 0 times theorem prover too weak. 2756 trivial. 0 not checked. [2018-11-22 23:11:26,532 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-22 23:11:27,372 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 248 proven. 498 refuted. 0 times theorem prover too weak. 2740 trivial. 0 not checked. [2018-11-22 23:11:27,389 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-22 23:11:27,390 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 15] total 20 [2018-11-22 23:11:27,390 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-22 23:11:27,390 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-22 23:11:27,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-22 23:11:27,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2018-11-22 23:11:27,391 INFO L87 Difference]: Start difference. First operand 172 states and 242 transitions. Second operand 14 states. [2018-11-22 23:11:27,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 23:11:27,554 INFO L93 Difference]: Finished difference Result 271 states and 471 transitions. [2018-11-22 23:11:27,554 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-22 23:11:27,554 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 354 [2018-11-22 23:11:27,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 23:11:27,558 INFO L225 Difference]: With dead ends: 271 [2018-11-22 23:11:27,558 INFO L226 Difference]: Without dead ends: 254 [2018-11-22 23:11:27,559 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 729 GetRequests, 689 SyntacticMatches, 13 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=172, Invalid=640, Unknown=0, NotChecked=0, Total=812 [2018-11-22 23:11:27,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2018-11-22 23:11:27,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 185. [2018-11-22 23:11:27,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2018-11-22 23:11:27,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 281 transitions. [2018-11-22 23:11:27,575 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 281 transitions. Word has length 354 [2018-11-22 23:11:27,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 23:11:27,575 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 281 transitions. [2018-11-22 23:11:27,575 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-22 23:11:27,575 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 281 transitions. [2018-11-22 23:11:27,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 667 [2018-11-22 23:11:27,578 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 23:11:27,579 INFO L402 BasicCegarLoop]: trace histogram [51, 51, 46, 46, 39, 38, 25, 25, 25, 25, 25, 25, 25, 23, 23, 23, 23, 23, 23, 23, 15, 14, 13, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 23:11:27,579 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 23:11:27,579 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 23:11:27,579 INFO L82 PathProgramCache]: Analyzing trace with hash 833426699, now seen corresponding path program 8 times [2018-11-22 23:11:27,579 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-22 23:11:27,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:11:27,580 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 23:11:27,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:11:27,580 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-22 23:11:27,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 23:11:27,843 INFO L134 CoverageAnalysis]: Checked inductivity of 12896 backedges. 987 proven. 909 refuted. 0 times theorem prover too weak. 11000 trivial. 0 not checked. [2018-11-22 23:11:27,843 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 23:11:27,843 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-22 23:11:27,844 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-22 23:11:27,844 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-22 23:11:27,844 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 23:11:27,844 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3d186492-92cd-4aff-95f1-6bcd8c7174a3/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 [2018-11-22 23:11:27,854 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-22 23:11:27,854 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-22 23:11:27,906 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-11-22 23:11:27,906 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 23:11:27,911 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 23:11:28,058 INFO L134 CoverageAnalysis]: Checked inductivity of 12896 backedges. 1494 proven. 34 refuted. 0 times theorem prover too weak. 11368 trivial. 0 not checked. [2018-11-22 23:11:28,058 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-22 23:11:29,084 INFO L134 CoverageAnalysis]: Checked inductivity of 12896 backedges. 1494 proven. 35 refuted. 0 times theorem prover too weak. 11367 trivial. 0 not checked. [2018-11-22 23:11:29,099 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-22 23:11:29,099 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 13] total 22 [2018-11-22 23:11:29,099 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-22 23:11:29,099 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-22 23:11:29,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-22 23:11:29,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2018-11-22 23:11:29,100 INFO L87 Difference]: Start difference. First operand 185 states and 281 transitions. Second operand 17 states. [2018-11-22 23:11:29,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 23:11:29,408 INFO L93 Difference]: Finished difference Result 376 states and 654 transitions. [2018-11-22 23:11:29,408 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-11-22 23:11:29,408 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 666 [2018-11-22 23:11:29,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 23:11:29,411 INFO L225 Difference]: With dead ends: 376 [2018-11-22 23:11:29,411 INFO L226 Difference]: Without dead ends: 217 [2018-11-22 23:11:29,412 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1358 GetRequests, 1315 SyntacticMatches, 11 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=205, Invalid=917, Unknown=0, NotChecked=0, Total=1122 [2018-11-22 23:11:29,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2018-11-22 23:11:29,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 208. [2018-11-22 23:11:29,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2018-11-22 23:11:29,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 322 transitions. [2018-11-22 23:11:29,426 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 322 transitions. Word has length 666 [2018-11-22 23:11:29,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 23:11:29,426 INFO L480 AbstractCegarLoop]: Abstraction has 208 states and 322 transitions. [2018-11-22 23:11:29,426 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-22 23:11:29,427 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 322 transitions. [2018-11-22 23:11:29,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 681 [2018-11-22 23:11:29,430 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 23:11:29,430 INFO L402 BasicCegarLoop]: trace histogram [50, 50, 49, 49, 41, 38, 25, 25, 25, 25, 25, 25, 25, 24, 24, 24, 24, 24, 24, 24, 16, 14, 12, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 23:11:29,430 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 23:11:29,431 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 23:11:29,431 INFO L82 PathProgramCache]: Analyzing trace with hash 728206672, now seen corresponding path program 9 times [2018-11-22 23:11:29,431 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-22 23:11:29,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:11:29,431 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 23:11:29,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:11:29,432 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-22 23:11:29,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 23:11:29,718 INFO L134 CoverageAnalysis]: Checked inductivity of 13431 backedges. 1216 proven. 64 refuted. 0 times theorem prover too weak. 12151 trivial. 0 not checked. [2018-11-22 23:11:29,718 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 23:11:29,718 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-22 23:11:29,719 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-22 23:11:29,719 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-22 23:11:29,719 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 23:11:29,719 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3d186492-92cd-4aff-95f1-6bcd8c7174a3/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 [2018-11-22 23:11:29,725 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-22 23:11:29,725 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-11-22 23:11:29,820 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-22 23:11:29,820 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 23:11:29,828 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 23:11:30,132 INFO L134 CoverageAnalysis]: Checked inductivity of 13431 backedges. 491 proven. 1364 refuted. 0 times theorem prover too weak. 11576 trivial. 0 not checked. [2018-11-22 23:11:30,132 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-22 23:11:31,722 INFO L134 CoverageAnalysis]: Checked inductivity of 13431 backedges. 490 proven. 1386 refuted. 0 times theorem prover too weak. 11555 trivial. 0 not checked. [2018-11-22 23:11:31,737 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-22 23:11:31,737 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 18] total 29 [2018-11-22 23:11:31,737 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-22 23:11:31,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-11-22 23:11:31,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-22 23:11:31,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=689, Unknown=0, NotChecked=0, Total=812 [2018-11-22 23:11:31,739 INFO L87 Difference]: Start difference. First operand 208 states and 322 transitions. Second operand 21 states. [2018-11-22 23:11:32,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 23:11:32,265 INFO L93 Difference]: Finished difference Result 502 states and 1001 transitions. [2018-11-22 23:11:32,265 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-11-22 23:11:32,265 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 680 [2018-11-22 23:11:32,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 23:11:32,268 INFO L225 Difference]: With dead ends: 502 [2018-11-22 23:11:32,268 INFO L226 Difference]: Without dead ends: 195 [2018-11-22 23:11:32,272 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1386 GetRequests, 1327 SyntacticMatches, 16 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=340, Invalid=1640, Unknown=0, NotChecked=0, Total=1980 [2018-11-22 23:11:32,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-11-22 23:11:32,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 192. [2018-11-22 23:11:32,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2018-11-22 23:11:32,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 265 transitions. [2018-11-22 23:11:32,291 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 265 transitions. Word has length 680 [2018-11-22 23:11:32,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 23:11:32,291 INFO L480 AbstractCegarLoop]: Abstraction has 192 states and 265 transitions. [2018-11-22 23:11:32,291 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-11-22 23:11:32,291 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 265 transitions. [2018-11-22 23:11:32,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 600 [2018-11-22 23:11:32,295 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 23:11:32,295 INFO L402 BasicCegarLoop]: trace histogram [44, 44, 43, 43, 35, 35, 22, 22, 22, 22, 22, 22, 22, 21, 21, 21, 21, 21, 21, 21, 14, 13, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 23:11:32,295 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 23:11:32,295 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 23:11:32,295 INFO L82 PathProgramCache]: Analyzing trace with hash 1522840536, now seen corresponding path program 10 times [2018-11-22 23:11:32,296 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-22 23:11:32,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:11:32,296 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 23:11:32,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:11:32,296 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-22 23:11:32,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 23:11:32,548 INFO L134 CoverageAnalysis]: Checked inductivity of 10350 backedges. 1007 proven. 1020 refuted. 0 times theorem prover too weak. 8323 trivial. 0 not checked. [2018-11-22 23:11:32,548 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 23:11:32,548 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-22 23:11:32,548 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-22 23:11:32,548 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-22 23:11:32,548 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 23:11:32,548 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3d186492-92cd-4aff-95f1-6bcd8c7174a3/bin-2019/utaipan/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 23:11:32,561 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 23:11:32,561 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-22 23:11:32,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 23:11:32,666 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 23:11:32,837 INFO L134 CoverageAnalysis]: Checked inductivity of 10350 backedges. 683 proven. 929 refuted. 0 times theorem prover too weak. 8738 trivial. 0 not checked. [2018-11-22 23:11:32,837 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-22 23:11:34,289 INFO L134 CoverageAnalysis]: Checked inductivity of 10350 backedges. 680 proven. 953 refuted. 0 times theorem prover too weak. 8717 trivial. 0 not checked. [2018-11-22 23:11:34,305 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-22 23:11:34,305 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 18] total 28 [2018-11-22 23:11:34,305 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-22 23:11:34,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-22 23:11:34,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-22 23:11:34,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=655, Unknown=0, NotChecked=0, Total=756 [2018-11-22 23:11:34,306 INFO L87 Difference]: Start difference. First operand 192 states and 265 transitions. Second operand 20 states. [2018-11-22 23:11:34,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 23:11:34,889 INFO L93 Difference]: Finished difference Result 459 states and 720 transitions. [2018-11-22 23:11:34,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-11-22 23:11:34,890 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 599 [2018-11-22 23:11:34,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 23:11:34,892 INFO L225 Difference]: With dead ends: 459 [2018-11-22 23:11:34,892 INFO L226 Difference]: Without dead ends: 241 [2018-11-22 23:11:34,894 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1237 GetRequests, 1172 SyntacticMatches, 16 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=396, Invalid=2154, Unknown=0, NotChecked=0, Total=2550 [2018-11-22 23:11:34,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2018-11-22 23:11:34,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 213. [2018-11-22 23:11:34,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2018-11-22 23:11:34,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 273 transitions. [2018-11-22 23:11:34,908 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 273 transitions. Word has length 599 [2018-11-22 23:11:34,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 23:11:34,909 INFO L480 AbstractCegarLoop]: Abstraction has 213 states and 273 transitions. [2018-11-22 23:11:34,909 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-22 23:11:34,909 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 273 transitions. [2018-11-22 23:11:34,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 505 [2018-11-22 23:11:34,911 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 23:11:34,912 INFO L402 BasicCegarLoop]: trace histogram [38, 38, 35, 35, 30, 29, 19, 19, 19, 19, 19, 19, 19, 17, 17, 17, 17, 17, 17, 17, 13, 10, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 23:11:34,912 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 23:11:34,912 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 23:11:34,912 INFO L82 PathProgramCache]: Analyzing trace with hash -1638954211, now seen corresponding path program 11 times [2018-11-22 23:11:34,912 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-22 23:11:34,913 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:11:34,913 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 23:11:34,913 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:11:34,913 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-22 23:11:34,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 23:11:35,148 INFO L134 CoverageAnalysis]: Checked inductivity of 7261 backedges. 1313 proven. 334 refuted. 0 times theorem prover too weak. 5614 trivial. 0 not checked. [2018-11-22 23:11:35,149 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 23:11:35,149 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-22 23:11:35,149 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-22 23:11:35,149 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-22 23:11:35,149 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 23:11:35,149 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3d186492-92cd-4aff-95f1-6bcd8c7174a3/bin-2019/utaipan/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 23:11:35,157 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-22 23:11:35,158 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-22 23:11:35,225 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2018-11-22 23:11:35,226 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 23:11:35,229 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 23:11:35,339 INFO L134 CoverageAnalysis]: Checked inductivity of 7261 backedges. 1201 proven. 210 refuted. 0 times theorem prover too weak. 5850 trivial. 0 not checked. [2018-11-22 23:11:35,339 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-22 23:11:36,492 INFO L134 CoverageAnalysis]: Checked inductivity of 7261 backedges. 1203 proven. 214 refuted. 0 times theorem prover too weak. 5844 trivial. 0 not checked. [2018-11-22 23:11:36,507 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-22 23:11:36,507 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14, 17] total 29 [2018-11-22 23:11:36,507 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-22 23:11:36,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-11-22 23:11:36,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-11-22 23:11:36,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2018-11-22 23:11:36,508 INFO L87 Difference]: Start difference. First operand 213 states and 273 transitions. Second operand 22 states. [2018-11-22 23:11:37,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 23:11:37,139 INFO L93 Difference]: Finished difference Result 492 states and 730 transitions. [2018-11-22 23:11:37,139 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-11-22 23:11:37,140 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 504 [2018-11-22 23:11:37,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 23:11:37,142 INFO L225 Difference]: With dead ends: 492 [2018-11-22 23:11:37,142 INFO L226 Difference]: Without dead ends: 306 [2018-11-22 23:11:37,144 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1058 GetRequests, 986 SyntacticMatches, 15 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 809 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=536, Invalid=2886, Unknown=0, NotChecked=0, Total=3422 [2018-11-22 23:11:37,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2018-11-22 23:11:37,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 270. [2018-11-22 23:11:37,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2018-11-22 23:11:37,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 369 transitions. [2018-11-22 23:11:37,170 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 369 transitions. Word has length 504 [2018-11-22 23:11:37,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 23:11:37,171 INFO L480 AbstractCegarLoop]: Abstraction has 270 states and 369 transitions. [2018-11-22 23:11:37,171 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-11-22 23:11:37,171 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 369 transitions. [2018-11-22 23:11:37,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 746 [2018-11-22 23:11:37,176 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 23:11:37,176 INFO L402 BasicCegarLoop]: trace histogram [67, 67, 46, 42, 42, 38, 33, 33, 33, 33, 33, 33, 33, 25, 21, 21, 21, 21, 21, 21, 21, 21, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 23:11:37,176 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 23:11:37,176 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 23:11:37,177 INFO L82 PathProgramCache]: Analyzing trace with hash 543241633, now seen corresponding path program 12 times [2018-11-22 23:11:37,177 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-22 23:11:37,177 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:11:37,177 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 23:11:37,177 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:11:37,177 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-22 23:11:37,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 23:11:37,559 INFO L134 CoverageAnalysis]: Checked inductivity of 16978 backedges. 1247 proven. 819 refuted. 0 times theorem prover too weak. 14912 trivial. 0 not checked. [2018-11-22 23:11:37,560 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 23:11:37,560 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-22 23:11:37,560 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-22 23:11:37,560 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-22 23:11:37,560 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 23:11:37,560 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3d186492-92cd-4aff-95f1-6bcd8c7174a3/bin-2019/utaipan/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 23:11:37,573 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-22 23:11:37,573 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-11-22 23:11:37,688 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-22 23:11:37,688 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 23:11:37,694 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 23:11:37,869 INFO L134 CoverageAnalysis]: Checked inductivity of 16978 backedges. 450 proven. 1319 refuted. 0 times theorem prover too weak. 15209 trivial. 0 not checked. [2018-11-22 23:11:37,869 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-22 23:11:39,153 INFO L134 CoverageAnalysis]: Checked inductivity of 16978 backedges. 452 proven. 1333 refuted. 0 times theorem prover too weak. 15193 trivial. 0 not checked. [2018-11-22 23:11:39,177 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-22 23:11:39,177 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 16] total 26 [2018-11-22 23:11:39,177 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-22 23:11:39,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-11-22 23:11:39,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-11-22 23:11:39,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2018-11-22 23:11:39,178 INFO L87 Difference]: Start difference. First operand 270 states and 369 transitions. Second operand 19 states. [2018-11-22 23:11:39,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 23:11:39,406 INFO L93 Difference]: Finished difference Result 385 states and 576 transitions. [2018-11-22 23:11:39,407 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-22 23:11:39,407 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 745 [2018-11-22 23:11:39,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 23:11:39,409 INFO L225 Difference]: With dead ends: 385 [2018-11-22 23:11:39,409 INFO L226 Difference]: Without dead ends: 209 [2018-11-22 23:11:39,410 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1518 GetRequests, 1471 SyntacticMatches, 13 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=251, Invalid=1009, Unknown=0, NotChecked=0, Total=1260 [2018-11-22 23:11:39,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2018-11-22 23:11:39,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 206. [2018-11-22 23:11:39,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2018-11-22 23:11:39,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 242 transitions. [2018-11-22 23:11:39,426 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 242 transitions. Word has length 745 [2018-11-22 23:11:39,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 23:11:39,427 INFO L480 AbstractCegarLoop]: Abstraction has 206 states and 242 transitions. [2018-11-22 23:11:39,427 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-11-22 23:11:39,427 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 242 transitions. [2018-11-22 23:11:39,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 464 [2018-11-22 23:11:39,429 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 23:11:39,429 INFO L402 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 27, 27, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 11, 10, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 23:11:39,429 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 23:11:39,430 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 23:11:39,430 INFO L82 PathProgramCache]: Analyzing trace with hash 1326629730, now seen corresponding path program 13 times [2018-11-22 23:11:39,430 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-22 23:11:39,430 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:11:39,431 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 23:11:39,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:11:39,431 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-22 23:11:39,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 23:11:40,312 INFO L134 CoverageAnalysis]: Checked inductivity of 6082 backedges. 0 proven. 2033 refuted. 0 times theorem prover too weak. 4049 trivial. 0 not checked. [2018-11-22 23:11:40,313 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 23:11:40,313 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-22 23:11:40,313 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-22 23:11:40,313 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-22 23:11:40,313 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 23:11:40,313 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3d186492-92cd-4aff-95f1-6bcd8c7174a3/bin-2019/utaipan/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 23:11:40,319 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 23:11:40,319 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-22 23:11:40,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 23:11:40,396 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 23:11:41,062 INFO L134 CoverageAnalysis]: Checked inductivity of 6082 backedges. 0 proven. 2033 refuted. 0 times theorem prover too weak. 4049 trivial. 0 not checked. [2018-11-22 23:11:41,062 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-22 23:11:43,528 INFO L134 CoverageAnalysis]: Checked inductivity of 6082 backedges. 0 proven. 2033 refuted. 0 times theorem prover too weak. 4049 trivial. 0 not checked. [2018-11-22 23:11:43,543 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-22 23:11:43,543 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 52 [2018-11-22 23:11:43,543 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-22 23:11:43,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-11-22 23:11:43,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-11-22 23:11:43,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=2527, Unknown=0, NotChecked=0, Total=2652 [2018-11-22 23:11:43,545 INFO L87 Difference]: Start difference. First operand 206 states and 242 transitions. Second operand 52 states. [2018-11-22 23:11:43,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 23:11:43,972 INFO L93 Difference]: Finished difference Result 228 states and 266 transitions. [2018-11-22 23:11:43,972 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-11-22 23:11:43,972 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 463 [2018-11-22 23:11:43,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 23:11:43,974 INFO L225 Difference]: With dead ends: 228 [2018-11-22 23:11:43,974 INFO L226 Difference]: Without dead ends: 195 [2018-11-22 23:11:43,975 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1062 GetRequests, 942 SyntacticMatches, 70 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=125, Invalid=2527, Unknown=0, NotChecked=0, Total=2652 [2018-11-22 23:11:43,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-11-22 23:11:43,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2018-11-22 23:11:43,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2018-11-22 23:11:43,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 225 transitions. [2018-11-22 23:11:43,988 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 225 transitions. Word has length 463 [2018-11-22 23:11:43,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 23:11:43,989 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 225 transitions. [2018-11-22 23:11:43,989 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-11-22 23:11:43,989 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 225 transitions. [2018-11-22 23:11:43,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 505 [2018-11-22 23:11:43,994 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 23:11:43,994 INFO L402 BasicCegarLoop]: trace histogram [38, 38, 35, 35, 30, 29, 19, 19, 19, 19, 19, 19, 19, 17, 17, 17, 17, 17, 17, 17, 13, 10, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 23:11:43,994 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 23:11:43,994 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 23:11:43,994 INFO L82 PathProgramCache]: Analyzing trace with hash -6928239, now seen corresponding path program 14 times [2018-11-22 23:11:43,994 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-22 23:11:43,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:11:43,995 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 23:11:43,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:11:43,995 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-22 23:11:44,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 23:11:44,396 INFO L134 CoverageAnalysis]: Checked inductivity of 7261 backedges. 288 proven. 1213 refuted. 0 times theorem prover too weak. 5760 trivial. 0 not checked. [2018-11-22 23:11:44,396 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 23:11:44,396 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-22 23:11:44,396 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-22 23:11:44,397 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-22 23:11:44,397 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 23:11:44,397 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3d186492-92cd-4aff-95f1-6bcd8c7174a3/bin-2019/utaipan/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 23:11:44,407 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-22 23:11:44,407 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-22 23:11:44,562 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 32 check-sat command(s) [2018-11-22 23:11:44,562 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 23:11:44,568 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 23:11:44,655 INFO L134 CoverageAnalysis]: Checked inductivity of 7261 backedges. 294 proven. 1204 refuted. 0 times theorem prover too weak. 5763 trivial. 0 not checked. [2018-11-22 23:11:44,656 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-22 23:11:46,327 INFO L134 CoverageAnalysis]: Checked inductivity of 7261 backedges. 291 proven. 1237 refuted. 0 times theorem prover too weak. 5733 trivial. 0 not checked. [2018-11-22 23:11:46,346 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-22 23:11:46,346 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 20] total 26 [2018-11-22 23:11:46,346 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-22 23:11:46,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-22 23:11:46,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-22 23:11:46,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=527, Unknown=0, NotChecked=0, Total=650 [2018-11-22 23:11:46,347 INFO L87 Difference]: Start difference. First operand 195 states and 225 transitions. Second operand 17 states. [2018-11-22 23:11:46,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 23:11:46,497 INFO L93 Difference]: Finished difference Result 195 states and 225 transitions. [2018-11-22 23:11:46,497 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-22 23:11:46,497 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 504 [2018-11-22 23:11:46,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 23:11:46,498 INFO L225 Difference]: With dead ends: 195 [2018-11-22 23:11:46,498 INFO L226 Difference]: Without dead ends: 0 [2018-11-22 23:11:46,499 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1035 GetRequests, 986 SyntacticMatches, 18 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=215, Invalid=841, Unknown=0, NotChecked=0, Total=1056 [2018-11-22 23:11:46,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-22 23:11:46,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-22 23:11:46,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-22 23:11:46,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-22 23:11:46,500 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 504 [2018-11-22 23:11:46,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 23:11:46,500 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-22 23:11:46,500 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-22 23:11:46,500 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-22 23:11:46,501 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-22 23:11:46,505 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-22 23:11:47,017 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-22 23:11:47,448 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-22 23:11:47,620 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-22 23:11:47,643 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-22 23:11:47,784 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-22 23:11:47,874 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-22 23:11:47,879 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-22 23:11:47,881 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-22 23:11:47,885 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-22 23:11:47,888 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-22 23:11:48,046 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-22 23:11:48,080 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-22 23:11:48,131 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-22 23:11:48,183 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-22 23:11:48,324 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-22 23:11:48,327 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-22 23:11:48,475 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-22 23:11:48,478 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-22 23:11:48,532 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-22 23:11:48,555 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-22 23:11:48,575 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-22 23:11:48,596 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-22 23:11:48,926 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-22 23:11:49,072 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-22 23:11:49,075 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-22 23:11:49,145 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-22 23:11:49,161 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-22 23:11:49,177 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-22 23:11:49,250 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-22 23:11:49,264 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-22 23:11:49,269 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-22 23:11:49,273 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-22 23:11:49,275 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-22 23:11:49,279 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-22 23:11:49,287 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-22 23:11:49,296 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-22 23:11:49,302 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-22 23:11:49,314 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-22 23:11:49,324 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-22 23:11:49,330 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-22 23:11:49,342 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-22 23:11:49,360 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-22 23:11:49,363 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-22 23:11:49,367 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-22 23:11:49,368 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-22 23:11:49,375 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-22 23:11:49,384 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-22 23:11:49,400 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-22 23:11:49,427 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-22 23:11:49,435 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-22 23:11:49,437 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-22 23:11:49,439 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-22 23:11:49,440 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-22 23:11:49,442 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-22 23:11:49,447 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-22 23:11:49,474 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-22 23:11:49,479 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-22 23:11:49,487 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-22 23:11:49,493 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-22 23:11:49,497 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-22 23:11:49,499 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-22 23:11:49,508 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-22 23:11:49,515 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-22 23:11:49,517 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-22 23:11:49,518 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-22 23:11:49,519 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-22 23:11:49,531 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-22 23:11:49,535 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-22 23:11:49,540 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-22 23:11:49,543 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-22 23:11:49,546 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-22 23:11:49,552 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-22 23:11:49,554 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-22 23:11:49,559 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-22 23:11:49,566 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-22 23:11:49,569 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-22 23:11:49,571 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-22 23:11:49,572 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-22 23:11:49,572 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-22 23:11:49,574 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-22 23:11:49,580 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-22 23:11:49,585 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-22 23:11:49,594 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-22 23:11:49,595 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-22 23:11:49,596 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-22 23:11:49,603 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-22 23:11:49,608 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-22 23:11:49,609 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-22 23:11:49,611 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-22 23:11:49,623 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-22 23:11:49,627 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-22 23:11:49,633 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-22 23:11:49,640 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-22 23:11:49,643 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-22 23:11:49,646 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-22 23:11:49,665 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-22 23:11:49,666 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-22 23:11:49,667 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-22 23:11:49,671 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-22 23:11:49,697 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-22 23:11:49,703 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-22 23:11:49,721 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-22 23:11:49,730 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-22 23:11:49,732 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-22 23:11:49,733 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-22 23:11:49,749 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-22 23:11:49,752 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-22 23:11:49,756 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-22 23:11:49,772 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-22 23:11:49,774 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-22 23:11:49,775 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-22 23:11:49,779 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-22 23:11:50,704 WARN L180 SmtUtils]: Spent 770.00 ms on a formula simplification. DAG size of input: 249 DAG size of output: 38 [2018-11-22 23:11:50,816 WARN L180 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 9 [2018-11-22 23:11:51,355 WARN L180 SmtUtils]: Spent 532.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 43 [2018-11-22 23:11:51,356 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-11-22 23:11:51,356 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-22 23:11:51,356 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-22 23:11:51,357 INFO L451 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-22 23:11:51,357 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-22 23:11:51,357 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-22 23:11:51,357 INFO L451 ceAbstractionStarter]: At program point mainENTRY(lines 35 42) the Hoare annotation is: true [2018-11-22 23:11:51,357 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 35 42) no Hoare annotation was computed. [2018-11-22 23:11:51,357 INFO L448 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 39) no Hoare annotation was computed. [2018-11-22 23:11:51,357 INFO L448 ceAbstractionStarter]: For program point mainFINAL(lines 35 42) no Hoare annotation was computed. [2018-11-22 23:11:51,357 INFO L448 ceAbstractionStarter]: For program point L39(line 39) no Hoare annotation was computed. [2018-11-22 23:11:51,357 INFO L448 ceAbstractionStarter]: For program point L38(lines 38 40) no Hoare annotation was computed. [2018-11-22 23:11:51,357 INFO L444 ceAbstractionStarter]: At program point L37(line 37) the Hoare annotation is: (and (<= 8 main_~x~0) (<= main_~x~0 8)) [2018-11-22 23:11:51,357 INFO L448 ceAbstractionStarter]: For program point L37-1(line 37) no Hoare annotation was computed. [2018-11-22 23:11:51,357 INFO L448 ceAbstractionStarter]: For program point L38-2(lines 38 40) no Hoare annotation was computed. [2018-11-22 23:11:51,357 INFO L451 ceAbstractionStarter]: At program point fibo2ENTRY(lines 17 25) the Hoare annotation is: true [2018-11-22 23:11:51,357 INFO L444 ceAbstractionStarter]: At program point L23(line 23) the Hoare annotation is: (and (<= fibo2_~n |fibo2_#in~n|) (<= |fibo2_#in~n| fibo2_~n) (< 3 |fibo2_#in~n|)) [2018-11-22 23:11:51,357 INFO L448 ceAbstractionStarter]: For program point L23-1(line 23) no Hoare annotation was computed. [2018-11-22 23:11:51,357 INFO L444 ceAbstractionStarter]: At program point L23-2(line 23) the Hoare annotation is: (and (or (and (<= 3 |fibo2_#t~ret2|) (<= |fibo2_#t~ret2| 3)) (not (= |fibo2_#in~n| 5))) (or (<= 7 |fibo2_#in~n|) (and (<= |fibo2_#t~ret2| 5) (<= 5 |fibo2_#t~ret2|)) (<= |fibo2_#in~n| 5)) (let ((.cse0 (and (<= fibo2_~n |fibo2_#in~n|) (<= |fibo2_#in~n| fibo2_~n) (<= 4 fibo2_~n)))) (or (and .cse0 (<= 5 |fibo2_#in~n|)) (and (<= |fibo2_#t~ret2| 2) .cse0 (<= 2 |fibo2_#t~ret2|)))) (or (and (<= |fibo2_#t~ret2| 8) (<= 8 |fibo2_#t~ret2|)) (not (= |fibo2_#in~n| 7)))) [2018-11-22 23:11:51,357 INFO L448 ceAbstractionStarter]: For program point L20(lines 20 24) no Hoare annotation was computed. [2018-11-22 23:11:51,357 INFO L448 ceAbstractionStarter]: For program point L23-3(line 23) no Hoare annotation was computed. [2018-11-22 23:11:51,357 INFO L448 ceAbstractionStarter]: For program point L18(lines 18 24) no Hoare annotation was computed. [2018-11-22 23:11:51,358 INFO L448 ceAbstractionStarter]: For program point fibo2FINAL(lines 17 25) no Hoare annotation was computed. [2018-11-22 23:11:51,358 INFO L448 ceAbstractionStarter]: For program point fibo2EXIT(lines 17 25) no Hoare annotation was computed. [2018-11-22 23:11:51,358 INFO L451 ceAbstractionStarter]: At program point fibo1ENTRY(lines 7 15) the Hoare annotation is: true [2018-11-22 23:11:51,358 INFO L444 ceAbstractionStarter]: At program point L13(line 13) the Hoare annotation is: (and (< 3 |fibo1_#in~n|) (<= fibo1_~n |fibo1_#in~n|) (<= |fibo1_#in~n| fibo1_~n)) [2018-11-22 23:11:51,358 INFO L448 ceAbstractionStarter]: For program point L13-1(line 13) no Hoare annotation was computed. [2018-11-22 23:11:51,358 INFO L444 ceAbstractionStarter]: At program point L13-2(line 13) the Hoare annotation is: (and (or (not (= |fibo1_#in~n| 4)) (and (<= 2 |fibo1_#t~ret0|) (<= |fibo1_#t~ret0| 2))) (or (and (<= |fibo1_#t~ret0| 5) (<= 5 |fibo1_#t~ret0|)) (not (= |fibo1_#in~n| 6))) (or (not (= |fibo1_#in~n| 8)) (and (<= |fibo1_#t~ret0| 13) (<= 13 |fibo1_#t~ret0|))) (let ((.cse1 (<= |fibo1_#in~n| fibo1_~n)) (.cse0 (and (<= fibo1_~n |fibo1_#in~n|) (<= 3 |fibo1_#in~n|)))) (or (and (<= 3 |fibo1_#t~ret0|) (<= |fibo1_#t~ret0| 3) .cse0 .cse1 (<= 5 |fibo1_#in~n|)) (and (<= 6 |fibo1_#in~n|) .cse0 .cse1) (and (<= 4 fibo1_~n) .cse0 (<= |fibo1_#in~n| 4))))) [2018-11-22 23:11:51,358 INFO L448 ceAbstractionStarter]: For program point fibo1FINAL(lines 7 15) no Hoare annotation was computed. [2018-11-22 23:11:51,358 INFO L448 ceAbstractionStarter]: For program point L10(lines 10 14) no Hoare annotation was computed. [2018-11-22 23:11:51,358 INFO L448 ceAbstractionStarter]: For program point L13-3(line 13) no Hoare annotation was computed. [2018-11-22 23:11:51,358 INFO L448 ceAbstractionStarter]: For program point L8(lines 8 14) no Hoare annotation was computed. [2018-11-22 23:11:51,358 INFO L448 ceAbstractionStarter]: For program point fibo1EXIT(lines 7 15) no Hoare annotation was computed. [2018-11-22 23:11:51,359 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 11:11:51 BoogieIcfgContainer [2018-11-22 23:11:51,360 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-22 23:11:51,360 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-22 23:11:51,360 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-22 23:11:51,360 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-22 23:11:51,360 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 11:11:05" (3/4) ... [2018-11-22 23:11:51,363 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-22 23:11:51,367 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-22 23:11:51,368 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-22 23:11:51,368 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo2 [2018-11-22 23:11:51,368 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo1 [2018-11-22 23:11:51,371 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-11-22 23:11:51,372 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-11-22 23:11:51,372 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-22 23:11:51,406 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_3d186492-92cd-4aff-95f1-6bcd8c7174a3/bin-2019/utaipan/witness.graphml [2018-11-22 23:11:51,406 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-22 23:11:51,407 INFO L168 Benchmark]: Toolchain (without parser) took 46441.42 ms. Allocated memory was 1.0 GB in the beginning and 4.3 GB in the end (delta: 3.3 GB). Free memory was 959.2 MB in the beginning and 3.4 GB in the end (delta: -2.5 GB). Peak memory consumption was 803.2 MB. Max. memory is 11.5 GB. [2018-11-22 23:11:51,407 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-22 23:11:51,407 INFO L168 Benchmark]: CACSL2BoogieTranslator took 151.53 ms. Allocated memory is still 1.0 GB. Free memory was 959.2 MB in the beginning and 948.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-22 23:11:51,408 INFO L168 Benchmark]: Boogie Procedure Inliner took 16.69 ms. Allocated memory is still 1.0 GB. Free memory was 948.5 MB in the beginning and 945.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-22 23:11:51,408 INFO L168 Benchmark]: Boogie Preprocessor took 14.66 ms. Allocated memory is still 1.0 GB. Free memory was 945.8 MB in the beginning and 940.4 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2018-11-22 23:11:51,408 INFO L168 Benchmark]: RCFGBuilder took 222.85 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 152.6 MB). Free memory was 940.4 MB in the beginning and 1.1 GB in the end (delta: -196.2 MB). Peak memory consumption was 14.4 MB. Max. memory is 11.5 GB. [2018-11-22 23:11:51,408 INFO L168 Benchmark]: TraceAbstraction took 45986.35 ms. Allocated memory was 1.2 GB in the beginning and 4.3 GB in the end (delta: 3.1 GB). Free memory was 1.1 GB in the beginning and 3.5 GB in the end (delta: -2.3 GB). Peak memory consumption was 3.4 GB. Max. memory is 11.5 GB. [2018-11-22 23:11:51,409 INFO L168 Benchmark]: Witness Printer took 46.25 ms. Allocated memory is still 4.3 GB. Free memory was 3.5 GB in the beginning and 3.4 GB in the end (delta: 66.5 MB). Peak memory consumption was 66.5 MB. Max. memory is 11.5 GB. [2018-11-22 23:11:51,411 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 151.53 ms. Allocated memory is still 1.0 GB. Free memory was 959.2 MB in the beginning and 948.5 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 16.69 ms. Allocated memory is still 1.0 GB. Free memory was 948.5 MB in the beginning and 945.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 14.66 ms. Allocated memory is still 1.0 GB. Free memory was 945.8 MB in the beginning and 940.4 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 222.85 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 152.6 MB). Free memory was 940.4 MB in the beginning and 1.1 GB in the end (delta: -196.2 MB). Peak memory consumption was 14.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 45986.35 ms. Allocated memory was 1.2 GB in the beginning and 4.3 GB in the end (delta: 3.1 GB). Free memory was 1.1 GB in the beginning and 3.5 GB in the end (delta: -2.3 GB). Peak memory consumption was 3.4 GB. Max. memory is 11.5 GB. * Witness Printer took 46.25 ms. Allocated memory is still 4.3 GB. Free memory was 3.5 GB in the beginning and 3.4 GB in the end (delta: 66.5 MB). Peak memory consumption was 66.5 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 39]: 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 5 procedures, 33 locations, 1 error locations. SAFE Result, 45.9s OverallTime, 21 OverallIterations, 67 TraceHistogramMax, 6.3s AutomataDifference, 0.0s DeadEndRemovalTime, 4.8s HoareAnnotationTime, HoareTripleCheckerStatistics: 817 SDtfs, 1113 SDslu, 8101 SDs, 0 SdLazy, 7685 SolverSat, 1169 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.8s Time, PredicateUnifierStatistics: 8 DeclaredPredicates, 12973 GetRequests, 12125 SyntacticMatches, 249 SemanticMatches, 599 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4568 ImplicationChecksByTransitivity, 6.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=270occurred in iteration=18, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 9.4s AbstIntTime, 5 AbstIntIterations, 4 AbstIntStrong, 0.8604060913705583 AbsIntWeakeningRatio, 0.5685279187817259 AbsIntAvgWeakeningVarsNumRemoved, 0.20812182741116753 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 21 MinimizatonAttempts, 441 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 1259 PreInvPairs, 2684 NumberOfFragments, 194 HoareAnnotationTreeSize, 1259 FomulaSimplifications, 1582186 FormulaSimplificationTreeSizeReduction, 3.2s HoareSimplificationTime, 11 FomulaSimplificationsInter, 73842 FormulaSimplificationTreeSizeReductionInter, 1.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 21.6s InterpolantComputationTime, 12474 NumberOfCodeBlocks, 10978 NumberOfCodeBlocksAsserted, 95 NumberOfCheckSat, 18546 ConstructedInterpolants, 0 QuantifiedInterpolants, 14013318 SizeOfPredicates, 99 NumberOfNonLiveVariables, 10037 ConjunctsInSsa, 467 ConjunctsInUnsatCore, 51 InterpolantComputations, 2 PerfectInterpolantSequences, 254657/282422 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...