./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/reducercommutativity/rangesum20_false-unreach-call.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 1dbac8bc Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_794f16d1-db77-43b9-9a12-a3766f4319dc/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_794f16d1-db77-43b9-9a12-a3766f4319dc/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_794f16d1-db77-43b9-9a12-a3766f4319dc/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_794f16d1-db77-43b9-9a12-a3766f4319dc/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/reducercommutativity/rangesum20_false-unreach-call.i -s /tmp/vcloud-vcloud-master/worker/working_dir_794f16d1-db77-43b9-9a12-a3766f4319dc/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_794f16d1-db77-43b9-9a12-a3766f4319dc/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 d02e722fa6530375aea2bbc43a68e422ad66c6f3 ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.1.23-1dbac8b [2018-10-27 00:32:57,447 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-27 00:32:57,449 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-27 00:32:57,458 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-27 00:32:57,458 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-27 00:32:57,459 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-27 00:32:57,460 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-27 00:32:57,461 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-27 00:32:57,463 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-27 00:32:57,463 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-27 00:32:57,464 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-27 00:32:57,464 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-27 00:32:57,465 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-27 00:32:57,466 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-27 00:32:57,467 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-27 00:32:57,467 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-27 00:32:57,468 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-27 00:32:57,470 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-27 00:32:57,471 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-27 00:32:57,472 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-27 00:32:57,473 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-27 00:32:57,474 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-27 00:32:57,476 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-27 00:32:57,476 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-27 00:32:57,477 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-27 00:32:57,477 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-27 00:32:57,478 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-27 00:32:57,479 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-27 00:32:57,479 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-27 00:32:57,480 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-27 00:32:57,480 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-27 00:32:57,481 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-27 00:32:57,481 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-27 00:32:57,481 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-27 00:32:57,482 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-27 00:32:57,482 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-27 00:32:57,483 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_794f16d1-db77-43b9-9a12-a3766f4319dc/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-10-27 00:32:57,493 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-27 00:32:57,493 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-27 00:32:57,494 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-27 00:32:57,494 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-27 00:32:57,494 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-27 00:32:57,494 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-27 00:32:57,495 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-27 00:32:57,495 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-27 00:32:57,495 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-27 00:32:57,495 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-27 00:32:57,495 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-27 00:32:57,496 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-27 00:32:57,496 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-27 00:32:57,496 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-27 00:32:57,496 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-27 00:32:57,496 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-27 00:32:57,498 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-27 00:32:57,498 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-27 00:32:57,498 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-27 00:32:57,498 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-27 00:32:57,498 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-27 00:32:57,498 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-27 00:32:57,499 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-27 00:32:57,499 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-27 00:32:57,499 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-27 00:32:57,499 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-27 00:32:57,499 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-27 00:32:57,499 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-27 00:32:57,499 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-27 00:32:57,500 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-27 00:32:57,500 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-27 00:32:57,500 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-27 00:32:57,500 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-27 00:32:57,500 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-27 00:32:57,500 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_794f16d1-db77-43b9-9a12-a3766f4319dc/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 -> d02e722fa6530375aea2bbc43a68e422ad66c6f3 [2018-10-27 00:32:57,527 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-27 00:32:57,537 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-27 00:32:57,539 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-27 00:32:57,541 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-27 00:32:57,541 INFO L276 PluginConnector]: CDTParser initialized [2018-10-27 00:32:57,542 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_794f16d1-db77-43b9-9a12-a3766f4319dc/bin-2019/utaipan/../../sv-benchmarks/c/reducercommutativity/rangesum20_false-unreach-call.i [2018-10-27 00:32:57,589 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_794f16d1-db77-43b9-9a12-a3766f4319dc/bin-2019/utaipan/data/e4840a2d6/fd483b32d59341c0bf3d6e4bbeb5815f/FLAGa480c2b47 [2018-10-27 00:32:57,979 INFO L298 CDTParser]: Found 1 translation units. [2018-10-27 00:32:57,980 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_794f16d1-db77-43b9-9a12-a3766f4319dc/sv-benchmarks/c/reducercommutativity/rangesum20_false-unreach-call.i [2018-10-27 00:32:57,985 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_794f16d1-db77-43b9-9a12-a3766f4319dc/bin-2019/utaipan/data/e4840a2d6/fd483b32d59341c0bf3d6e4bbeb5815f/FLAGa480c2b47 [2018-10-27 00:32:57,995 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_794f16d1-db77-43b9-9a12-a3766f4319dc/bin-2019/utaipan/data/e4840a2d6/fd483b32d59341c0bf3d6e4bbeb5815f [2018-10-27 00:32:57,997 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-27 00:32:57,998 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-10-27 00:32:57,999 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-27 00:32:57,999 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-27 00:32:58,002 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-27 00:32:58,003 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:32:57" (1/1) ... [2018-10-27 00:32:58,007 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e46d88e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:32:58, skipping insertion in model container [2018-10-27 00:32:58,007 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:32:57" (1/1) ... [2018-10-27 00:32:58,016 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-27 00:32:58,032 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-27 00:32:58,182 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 00:32:58,190 INFO L189 MainTranslator]: Completed pre-run [2018-10-27 00:32:58,214 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 00:32:58,229 INFO L193 MainTranslator]: Completed translation [2018-10-27 00:32:58,230 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:32:58 WrapperNode [2018-10-27 00:32:58,230 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-27 00:32:58,230 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-27 00:32:58,231 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-27 00:32:58,231 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-27 00:32:58,238 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:32:58" (1/1) ... [2018-10-27 00:32:58,245 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:32:58" (1/1) ... [2018-10-27 00:32:58,271 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-27 00:32:58,272 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-27 00:32:58,272 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-27 00:32:58,272 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-27 00:32:58,280 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:32:58" (1/1) ... [2018-10-27 00:32:58,280 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:32:58" (1/1) ... [2018-10-27 00:32:58,283 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:32:58" (1/1) ... [2018-10-27 00:32:58,288 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:32:58" (1/1) ... [2018-10-27 00:32:58,298 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:32:58" (1/1) ... [2018-10-27 00:32:58,312 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:32:58" (1/1) ... [2018-10-27 00:32:58,314 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:32:58" (1/1) ... [2018-10-27 00:32:58,315 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-27 00:32:58,316 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-27 00:32:58,316 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-27 00:32:58,316 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-27 00:32:58,319 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:32:58" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794f16d1-db77-43b9-9a12-a3766f4319dc/bin-2019/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-27 00:32:58,448 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-27 00:32:58,449 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-27 00:32:58,449 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-27 00:32:58,450 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-27 00:32:58,450 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-27 00:32:58,450 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-27 00:32:58,450 INFO L130 BoogieDeclarations]: Found specification of procedure rangesum [2018-10-27 00:32:58,451 INFO L138 BoogieDeclarations]: Found implementation of procedure rangesum [2018-10-27 00:32:58,451 INFO L130 BoogieDeclarations]: Found specification of procedure init_nondet [2018-10-27 00:32:58,451 INFO L138 BoogieDeclarations]: Found implementation of procedure init_nondet [2018-10-27 00:32:58,911 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-27 00:32:58,912 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:32:58 BoogieIcfgContainer [2018-10-27 00:32:58,912 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-27 00:32:58,913 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-27 00:32:58,913 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-27 00:32:58,915 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-27 00:32:58,915 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 12:32:57" (1/3) ... [2018-10-27 00:32:58,916 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11afc815 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:32:58, skipping insertion in model container [2018-10-27 00:32:58,916 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:32:58" (2/3) ... [2018-10-27 00:32:58,916 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11afc815 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:32:58, skipping insertion in model container [2018-10-27 00:32:58,917 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:32:58" (3/3) ... [2018-10-27 00:32:58,918 INFO L112 eAbstractionObserver]: Analyzing ICFG rangesum20_false-unreach-call.i [2018-10-27 00:32:58,926 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-27 00:32:58,932 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-27 00:32:58,941 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-27 00:32:58,966 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-27 00:32:58,966 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-27 00:32:58,966 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-27 00:32:58,966 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-27 00:32:58,966 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-27 00:32:58,967 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-27 00:32:58,967 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-27 00:32:58,967 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-27 00:32:58,981 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2018-10-27 00:32:58,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-10-27 00:32:58,986 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 00:32:58,987 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2018-10-27 00:32:58,989 INFO L424 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 00:32:58,994 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 00:32:58,994 INFO L82 PathProgramCache]: Analyzing trace with hash -1049289672, now seen corresponding path program 1 times [2018-10-27 00:32:58,996 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 00:32:59,030 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:32:59,030 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 00:32:59,031 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:32:59,031 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 00:32:59,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 00:32:59,100 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2018-10-27 00:32:59,101 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 00:32:59,101 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 00:32:59,101 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 38 with the following transitions: [2018-10-27 00:32:59,105 INFO L202 CegarAbsIntRunner]: [0], [1], [5], [7], [9], [11], [24], [26], [28], [31], [32], [39], [57], [61], [63], [64], [77], [79], [80], [81], [82], [84], [85], [86], [87], [88], [89], [90], [91] [2018-10-27 00:32:59,152 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-27 00:32:59,152 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 00:32:59,281 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-27 00:32:59,282 INFO L272 AbstractInterpreter]: Visited 9 different actions 9 times. Never merged. Never widened. Never found a fixpoint. Largest state had 37 variables. [2018-10-27 00:32:59,298 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 00:32:59,298 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-27 00:32:59,373 INFO L227 lantSequenceWeakener]: Weakened 8 states. On average, predicates are now at 93.06% of their original sizes. [2018-10-27 00:32:59,373 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-10-27 00:32:59,443 INFO L415 sIntCurrentIteration]: We unified 36 AI predicates to 36 [2018-10-27 00:32:59,444 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-27 00:32:59,445 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 00:32:59,445 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-27 00:32:59,445 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 00:32:59,450 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-27 00:32:59,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-27 00:32:59,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-27 00:32:59,455 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 4 states. [2018-10-27 00:32:59,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 00:32:59,826 INFO L93 Difference]: Finished difference Result 69 states and 90 transitions. [2018-10-27 00:32:59,826 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-27 00:32:59,827 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 37 [2018-10-27 00:32:59,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 00:32:59,835 INFO L225 Difference]: With dead ends: 69 [2018-10-27 00:32:59,835 INFO L226 Difference]: Without dead ends: 35 [2018-10-27 00:32:59,838 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 36 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-27 00:32:59,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-27 00:32:59,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-10-27 00:32:59,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-27 00:32:59,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2018-10-27 00:32:59,886 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 37 [2018-10-27 00:32:59,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 00:32:59,887 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2018-10-27 00:32:59,887 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-27 00:32:59,887 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2018-10-27 00:32:59,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-27 00:32:59,891 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 00:32:59,892 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2018-10-27 00:32:59,892 INFO L424 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 00:32:59,892 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 00:32:59,892 INFO L82 PathProgramCache]: Analyzing trace with hash 1338067039, now seen corresponding path program 1 times [2018-10-27 00:32:59,892 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 00:32:59,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:32:59,893 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 00:32:59,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:32:59,894 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 00:32:59,909 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-27 00:32:59,911 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-27 00:32:59,911 INFO L171 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794f16d1-db77-43b9-9a12-a3766f4319dc/bin-2019/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2018-10-27 00:32:59,922 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 00:32:59,923 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-27 00:32:59,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 00:32:59,987 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 43 with the following transitions: [2018-10-27 00:32:59,987 INFO L202 CegarAbsIntRunner]: [0], [1], [5], [7], [9], [11], [15], [18], [26], [28], [31], [32], [39], [43], [46], [61], [63], [64], [68], [71], [79], [80], [81], [82], [84], [85], [86], [87], [88], [89], [90], [91] [2018-10-27 00:32:59,989 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-27 00:32:59,990 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 00:33:00,012 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-27 00:33:00,013 INFO L272 AbstractInterpreter]: Visited 10 different actions 10 times. Never merged. Never widened. Never found a fixpoint. Largest state had 37 variables. [2018-10-27 00:33:00,053 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 00:33:00,053 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-27 00:33:00,092 INFO L227 lantSequenceWeakener]: Weakened 9 states. On average, predicates are now at 91.36% of their original sizes. [2018-10-27 00:33:00,092 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-10-27 00:33:00,271 INFO L415 sIntCurrentIteration]: We unified 41 AI predicates to 41 [2018-10-27 00:33:00,271 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-27 00:33:00,272 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 00:33:00,272 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-27 00:33:00,272 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 00:33:00,273 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-27 00:33:00,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-27 00:33:00,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-27 00:33:00,274 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand 5 states. [2018-10-27 00:33:00,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 00:33:00,818 INFO L93 Difference]: Finished difference Result 62 states and 74 transitions. [2018-10-27 00:33:00,818 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-27 00:33:00,818 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 42 [2018-10-27 00:33:00,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 00:33:00,819 INFO L225 Difference]: With dead ends: 62 [2018-10-27 00:33:00,819 INFO L226 Difference]: Without dead ends: 38 [2018-10-27 00:33:00,820 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 42 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-10-27 00:33:00,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-10-27 00:33:00,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2018-10-27 00:33:00,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-10-27 00:33:00,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2018-10-27 00:33:00,829 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 42 [2018-10-27 00:33:00,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 00:33:00,829 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2018-10-27 00:33:00,829 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-27 00:33:00,829 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2018-10-27 00:33:00,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-10-27 00:33:00,830 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 00:33:00,830 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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, 1] [2018-10-27 00:33:00,830 INFO L424 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 00:33:00,831 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 00:33:00,831 INFO L82 PathProgramCache]: Analyzing trace with hash -1866850875, now seen corresponding path program 1 times [2018-10-27 00:33:00,831 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 00:33:00,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:33:00,831 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 00:33:00,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:33:00,832 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 00:33:00,847 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-27 00:33:00,847 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-27 00:33:00,847 INFO L171 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794f16d1-db77-43b9-9a12-a3766f4319dc/bin-2019/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-27 00:33:00,858 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 00:33:00,858 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-10-27 00:33:00,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 00:33:00,929 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 46 with the following transitions: [2018-10-27 00:33:00,929 INFO L202 CegarAbsIntRunner]: [0], [1], [5], [7], [9], [11], [15], [18], [26], [28], [31], [32], [39], [43], [46], [61], [63], [64], [68], [71], [73], [75], [79], [80], [81], [82], [84], [85], [86], [87], [88], [89], [90], [91] [2018-10-27 00:33:00,931 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-27 00:33:00,931 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 00:33:01,179 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-27 00:33:01,182 INFO L272 AbstractInterpreter]: Visited 19 different actions 55 times. Merged at 3 different actions 27 times. Widened at 1 different actions 5 times. Found 1 fixpoints after 1 different actions. Largest state had 37 variables. [2018-10-27 00:33:01,212 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 00:33:01,213 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-27 00:33:01,282 INFO L227 lantSequenceWeakener]: Weakened 19 states. On average, predicates are now at 85.03% of their original sizes. [2018-10-27 00:33:01,283 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-10-27 00:33:01,986 INFO L415 sIntCurrentIteration]: We unified 44 AI predicates to 44 [2018-10-27 00:33:01,986 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-27 00:33:01,987 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 00:33:01,987 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2018-10-27 00:33:01,987 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 00:33:01,987 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-27 00:33:01,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-27 00:33:01,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2018-10-27 00:33:01,988 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand 9 states. [2018-10-27 00:33:02,865 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-27 00:33:03,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 00:33:03,668 INFO L93 Difference]: Finished difference Result 61 states and 76 transitions. [2018-10-27 00:33:03,668 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-27 00:33:03,668 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 45 [2018-10-27 00:33:03,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 00:33:03,669 INFO L225 Difference]: With dead ends: 61 [2018-10-27 00:33:03,669 INFO L226 Difference]: Without dead ends: 41 [2018-10-27 00:33:03,670 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2018-10-27 00:33:03,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-27 00:33:03,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2018-10-27 00:33:03,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-10-27 00:33:03,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2018-10-27 00:33:03,680 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 45 [2018-10-27 00:33:03,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 00:33:03,680 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2018-10-27 00:33:03,680 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-27 00:33:03,681 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2018-10-27 00:33:03,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-10-27 00:33:03,682 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 00:33:03,682 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 3, 3, 3, 3, 3, 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, 1] [2018-10-27 00:33:03,682 INFO L424 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 00:33:03,682 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 00:33:03,682 INFO L82 PathProgramCache]: Analyzing trace with hash -1254084674, now seen corresponding path program 1 times [2018-10-27 00:33:03,682 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 00:33:03,683 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:33:03,683 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 00:33:03,683 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:33:03,683 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 00:33:03,711 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-27 00:33:03,711 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-27 00:33:03,711 INFO L171 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794f16d1-db77-43b9-9a12-a3766f4319dc/bin-2019/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-27 00:33:03,718 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 00:33:03,718 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-10-27 00:33:03,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 00:33:03,745 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 58 with the following transitions: [2018-10-27 00:33:03,746 INFO L202 CegarAbsIntRunner]: [0], [1], [5], [7], [9], [11], [15], [18], [26], [28], [31], [32], [39], [43], [46], [48], [53], [55], [61], [63], [64], [68], [71], [73], [75], [79], [80], [81], [82], [84], [85], [86], [87], [88], [89], [90], [91] [2018-10-27 00:33:03,748 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-27 00:33:03,748 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 00:33:03,914 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-27 00:33:03,915 INFO L272 AbstractInterpreter]: Visited 22 different actions 106 times. Merged at 7 different actions 65 times. Widened at 2 different actions 11 times. Found 2 fixpoints after 2 different actions. Largest state had 37 variables. [2018-10-27 00:33:03,933 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 00:33:03,933 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-27 00:33:03,982 INFO L227 lantSequenceWeakener]: Weakened 23 states. On average, predicates are now at 82.89% of their original sizes. [2018-10-27 00:33:03,982 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-10-27 00:33:04,141 INFO L415 sIntCurrentIteration]: We unified 56 AI predicates to 56 [2018-10-27 00:33:04,141 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-27 00:33:04,141 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 00:33:04,141 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2018-10-27 00:33:04,142 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 00:33:04,142 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-27 00:33:04,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-27 00:33:04,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2018-10-27 00:33:04,142 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand 10 states. [2018-10-27 00:33:04,513 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-27 00:33:04,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 00:33:04,956 INFO L93 Difference]: Finished difference Result 67 states and 82 transitions. [2018-10-27 00:33:04,956 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-27 00:33:04,956 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 57 [2018-10-27 00:33:04,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 00:33:04,957 INFO L225 Difference]: With dead ends: 67 [2018-10-27 00:33:04,957 INFO L226 Difference]: Without dead ends: 44 [2018-10-27 00:33:04,958 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 61 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2018-10-27 00:33:04,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-10-27 00:33:04,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-10-27 00:33:04,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-10-27 00:33:04,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2018-10-27 00:33:04,964 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 57 [2018-10-27 00:33:04,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 00:33:04,964 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2018-10-27 00:33:04,968 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-27 00:33:04,969 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2018-10-27 00:33:04,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-10-27 00:33:04,970 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 00:33:04,970 INFO L375 BasicCegarLoop]: trace histogram [9, 6, 6, 3, 3, 3, 3, 3, 3, 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, 1] [2018-10-27 00:33:04,971 INFO L424 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 00:33:04,971 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 00:33:04,971 INFO L82 PathProgramCache]: Analyzing trace with hash -1360907787, now seen corresponding path program 1 times [2018-10-27 00:33:04,971 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 00:33:04,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:33:04,972 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 00:33:04,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:33:04,984 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 00:33:05,006 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-27 00:33:05,006 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-27 00:33:05,007 INFO L171 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794f16d1-db77-43b9-9a12-a3766f4319dc/bin-2019/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-27 00:33:05,020 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 00:33:05,020 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-10-27 00:33:05,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 00:33:05,065 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 70 with the following transitions: [2018-10-27 00:33:05,066 INFO L202 CegarAbsIntRunner]: [0], [1], [5], [7], [9], [11], [15], [18], [26], [28], [31], [32], [39], [43], [46], [48], [51], [53], [55], [61], [63], [64], [68], [71], [73], [75], [79], [80], [81], [82], [84], [85], [86], [87], [88], [89], [90], [91] [2018-10-27 00:33:05,067 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-27 00:33:05,067 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 00:33:05,245 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-27 00:33:05,993 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-27 00:33:05,993 INFO L272 AbstractInterpreter]: Visited 32 different actions 353 times. Merged at 11 different actions 232 times. Widened at 2 different actions 34 times. Found 37 fixpoints after 6 different actions. Largest state had 37 variables. [2018-10-27 00:33:06,031 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 00:33:06,031 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-27 00:33:06,183 INFO L227 lantSequenceWeakener]: Weakened 49 states. On average, predicates are now at 77.76% of their original sizes. [2018-10-27 00:33:06,184 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-10-27 00:33:06,970 INFO L415 sIntCurrentIteration]: We unified 68 AI predicates to 68 [2018-10-27 00:33:06,970 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-27 00:33:06,970 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 00:33:06,970 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2018-10-27 00:33:06,970 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 00:33:06,971 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-27 00:33:06,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-27 00:33:06,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2018-10-27 00:33:06,971 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand 19 states. [2018-10-27 00:33:13,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 00:33:13,049 INFO L93 Difference]: Finished difference Result 75 states and 91 transitions. [2018-10-27 00:33:13,049 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-27 00:33:13,049 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 69 [2018-10-27 00:33:13,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 00:33:13,050 INFO L225 Difference]: With dead ends: 75 [2018-10-27 00:33:13,050 INFO L226 Difference]: Without dead ends: 48 [2018-10-27 00:33:13,050 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 78 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2018-10-27 00:33:13,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-10-27 00:33:13,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2018-10-27 00:33:13,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-10-27 00:33:13,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2018-10-27 00:33:13,057 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 69 [2018-10-27 00:33:13,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 00:33:13,059 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2018-10-27 00:33:13,059 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-27 00:33:13,059 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2018-10-27 00:33:13,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-10-27 00:33:13,060 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 00:33:13,060 INFO L375 BasicCegarLoop]: trace histogram [9, 6, 6, 3, 3, 3, 3, 3, 3, 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, 1, 1] [2018-10-27 00:33:13,060 INFO L424 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 00:33:13,062 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 00:33:13,062 INFO L82 PathProgramCache]: Analyzing trace with hash 1443367440, now seen corresponding path program 1 times [2018-10-27 00:33:13,062 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 00:33:13,063 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:33:13,063 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 00:33:13,063 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:33:13,063 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 00:33:13,082 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-27 00:33:13,084 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-27 00:33:13,084 INFO L171 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794f16d1-db77-43b9-9a12-a3766f4319dc/bin-2019/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2018-10-27 00:33:13,099 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 00:33:13,099 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-27 00:33:13,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 00:33:13,151 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 73 with the following transitions: [2018-10-27 00:33:13,151 INFO L202 CegarAbsIntRunner]: [0], [1], [5], [7], [9], [11], [15], [18], [20], [22], [26], [28], [31], [32], [39], [43], [46], [48], [51], [53], [55], [61], [63], [64], [68], [71], [73], [75], [79], [80], [81], [82], [84], [85], [86], [87], [88], [89], [90], [91] [2018-10-27 00:33:13,153 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-27 00:33:13,153 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 00:33:13,311 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-27 00:33:15,329 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 00:33:15,329 INFO L272 AbstractInterpreter]: Visited 40 different actions 716 times. Merged at 20 different actions 484 times. Widened at 3 different actions 73 times. Found 74 fixpoints after 8 different actions. Largest state had 39 variables. [2018-10-27 00:33:15,365 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 00:33:15,365 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 00:33:15,366 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 00:33:15,366 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794f16d1-db77-43b9-9a12-a3766f4319dc/bin-2019/utaipan/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-10-27 00:33:15,376 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 00:33:15,376 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 00:33:15,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 00:33:15,472 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 00:33:15,653 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2018-10-27 00:33:15,653 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 00:33:15,781 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2018-10-27 00:33:15,812 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-27 00:33:15,812 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2018-10-27 00:33:15,812 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 00:33:15,812 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-27 00:33:15,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 00:33:15,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-27 00:33:15,815 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand 6 states. [2018-10-27 00:33:15,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 00:33:15,906 INFO L93 Difference]: Finished difference Result 88 states and 102 transitions. [2018-10-27 00:33:15,907 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-27 00:33:15,907 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 72 [2018-10-27 00:33:15,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 00:33:15,908 INFO L225 Difference]: With dead ends: 88 [2018-10-27 00:33:15,908 INFO L226 Difference]: Without dead ends: 55 [2018-10-27 00:33:15,909 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-27 00:33:15,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-27 00:33:15,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-10-27 00:33:15,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-10-27 00:33:15,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 61 transitions. [2018-10-27 00:33:15,918 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 61 transitions. Word has length 72 [2018-10-27 00:33:15,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 00:33:15,919 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 61 transitions. [2018-10-27 00:33:15,919 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-27 00:33:15,919 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 61 transitions. [2018-10-27 00:33:15,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-10-27 00:33:15,920 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 00:33:15,922 INFO L375 BasicCegarLoop]: trace histogram [9, 6, 6, 5, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2018-10-27 00:33:15,922 INFO L424 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 00:33:15,922 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 00:33:15,922 INFO L82 PathProgramCache]: Analyzing trace with hash -1140034890, now seen corresponding path program 2 times [2018-10-27 00:33:15,923 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 00:33:15,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:33:15,923 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 00:33:15,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:33:15,924 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 00:33:15,940 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-27 00:33:15,940 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-27 00:33:15,940 INFO L171 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794f16d1-db77-43b9-9a12-a3766f4319dc/bin-2019/utaipan/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-27 00:33:15,955 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-27 00:33:15,955 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-10-27 00:33:15,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 00:33:16,019 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-27 00:33:16,019 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-27 00:33:16,019 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 00:33:16,019 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794f16d1-db77-43b9-9a12-a3766f4319dc/bin-2019/utaipan/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-10-27 00:33:16,030 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-27 00:33:16,031 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 00:33:16,097 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-10-27 00:33:16,098 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-27 00:33:16,100 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 00:33:16,133 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 47 proven. 3 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2018-10-27 00:33:16,133 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 00:33:16,203 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 47 proven. 3 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2018-10-27 00:33:16,219 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-27 00:33:16,220 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2018-10-27 00:33:16,220 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 00:33:16,220 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-27 00:33:16,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-27 00:33:16,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-27 00:33:16,221 INFO L87 Difference]: Start difference. First operand 55 states and 61 transitions. Second operand 8 states. [2018-10-27 00:33:16,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 00:33:16,331 INFO L93 Difference]: Finished difference Result 103 states and 125 transitions. [2018-10-27 00:33:16,335 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-27 00:33:16,335 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 81 [2018-10-27 00:33:16,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 00:33:16,336 INFO L225 Difference]: With dead ends: 103 [2018-10-27 00:33:16,336 INFO L226 Difference]: Without dead ends: 74 [2018-10-27 00:33:16,337 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-27 00:33:16,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-10-27 00:33:16,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 70. [2018-10-27 00:33:16,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-10-27 00:33:16,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 79 transitions. [2018-10-27 00:33:16,347 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 79 transitions. Word has length 81 [2018-10-27 00:33:16,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 00:33:16,347 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 79 transitions. [2018-10-27 00:33:16,347 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-27 00:33:16,347 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 79 transitions. [2018-10-27 00:33:16,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2018-10-27 00:33:16,350 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 00:33:16,350 INFO L375 BasicCegarLoop]: trace histogram [21, 18, 18, 15, 5, 4, 4, 3, 3, 3, 3, 3, 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] [2018-10-27 00:33:16,350 INFO L424 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 00:33:16,350 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 00:33:16,351 INFO L82 PathProgramCache]: Analyzing trace with hash 12732450, now seen corresponding path program 3 times [2018-10-27 00:33:16,351 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 00:33:16,351 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:33:16,351 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-27 00:33:16,352 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:33:16,352 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 00:33:16,372 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-27 00:33:16,372 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-27 00:33:16,373 INFO L171 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794f16d1-db77-43b9-9a12-a3766f4319dc/bin-2019/utaipan/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-27 00:33:16,384 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-27 00:33:16,384 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-10-27 00:33:16,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 00:33:16,442 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-27 00:33:16,442 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-27 00:33:16,442 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 00:33:16,442 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794f16d1-db77-43b9-9a12-a3766f4319dc/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 [2018-10-27 00:33:16,448 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-27 00:33:16,448 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-10-27 00:33:16,504 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-27 00:33:16,505 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-27 00:33:16,511 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 00:33:16,568 INFO L134 CoverageAnalysis]: Checked inductivity of 766 backedges. 127 proven. 3 refuted. 0 times theorem prover too weak. 636 trivial. 0 not checked. [2018-10-27 00:33:16,568 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 00:33:16,610 INFO L134 CoverageAnalysis]: Checked inductivity of 766 backedges. 33 proven. 349 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2018-10-27 00:33:16,627 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-27 00:33:16,627 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2018-10-27 00:33:16,627 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 00:33:16,628 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-27 00:33:16,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 00:33:16,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-27 00:33:16,628 INFO L87 Difference]: Start difference. First operand 70 states and 79 transitions. Second operand 6 states. [2018-10-27 00:33:16,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 00:33:16,699 INFO L93 Difference]: Finished difference Result 126 states and 148 transitions. [2018-10-27 00:33:16,700 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-27 00:33:16,700 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 129 [2018-10-27 00:33:16,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 00:33:16,701 INFO L225 Difference]: With dead ends: 126 [2018-10-27 00:33:16,701 INFO L226 Difference]: Without dead ends: 82 [2018-10-27 00:33:16,702 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 253 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-27 00:33:16,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-10-27 00:33:16,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-10-27 00:33:16,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-10-27 00:33:16,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 91 transitions. [2018-10-27 00:33:16,712 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 91 transitions. Word has length 129 [2018-10-27 00:33:16,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 00:33:16,712 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 91 transitions. [2018-10-27 00:33:16,712 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-27 00:33:16,712 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 91 transitions. [2018-10-27 00:33:16,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2018-10-27 00:33:16,714 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 00:33:16,714 INFO L375 BasicCegarLoop]: trace histogram [30, 27, 27, 15, 12, 5, 4, 4, 3, 3, 3, 3, 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] [2018-10-27 00:33:16,714 INFO L424 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 00:33:16,714 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 00:33:16,714 INFO L82 PathProgramCache]: Analyzing trace with hash 402280737, now seen corresponding path program 4 times [2018-10-27 00:33:16,715 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 00:33:16,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:33:16,715 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-27 00:33:16,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:33:16,715 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 00:33:16,738 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-27 00:33:16,739 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-27 00:33:16,739 INFO L171 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794f16d1-db77-43b9-9a12-a3766f4319dc/bin-2019/utaipan/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2018-10-27 00:33:16,764 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 00:33:16,765 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-27 00:33:16,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 00:33:16,840 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-27 00:33:16,840 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-27 00:33:16,840 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 00:33:16,840 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794f16d1-db77-43b9-9a12-a3766f4319dc/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 [2018-10-27 00:33:16,850 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 00:33:16,850 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 00:33:16,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 00:33:16,937 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 00:33:17,089 INFO L134 CoverageAnalysis]: Checked inductivity of 1612 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1586 trivial. 0 not checked. [2018-10-27 00:33:17,090 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 00:33:17,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1612 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1586 trivial. 0 not checked. [2018-10-27 00:33:17,185 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-27 00:33:17,185 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2018-10-27 00:33:17,185 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 00:33:17,186 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-27 00:33:17,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-27 00:33:17,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-27 00:33:17,186 INFO L87 Difference]: Start difference. First operand 82 states and 91 transitions. Second operand 12 states. [2018-10-27 00:33:17,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 00:33:17,275 INFO L93 Difference]: Finished difference Result 160 states and 183 transitions. [2018-10-27 00:33:17,275 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-27 00:33:17,276 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 165 [2018-10-27 00:33:17,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 00:33:17,277 INFO L225 Difference]: With dead ends: 160 [2018-10-27 00:33:17,277 INFO L226 Difference]: Without dead ends: 100 [2018-10-27 00:33:17,277 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 319 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-27 00:33:17,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-10-27 00:33:17,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2018-10-27 00:33:17,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-10-27 00:33:17,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 109 transitions. [2018-10-27 00:33:17,290 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 109 transitions. Word has length 165 [2018-10-27 00:33:17,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 00:33:17,291 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 109 transitions. [2018-10-27 00:33:17,291 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-27 00:33:17,291 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 109 transitions. [2018-10-27 00:33:17,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2018-10-27 00:33:17,292 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 00:33:17,294 INFO L375 BasicCegarLoop]: trace histogram [30, 27, 27, 15, 12, 11, 10, 10, 3, 3, 3, 3, 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] [2018-10-27 00:33:17,294 INFO L424 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 00:33:17,295 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 00:33:17,295 INFO L82 PathProgramCache]: Analyzing trace with hash 11726433, now seen corresponding path program 5 times [2018-10-27 00:33:17,295 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 00:33:17,295 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:33:17,295 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 00:33:17,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:33:17,296 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 00:33:17,321 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-27 00:33:17,321 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-27 00:33:17,321 INFO L171 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794f16d1-db77-43b9-9a12-a3766f4319dc/bin-2019/utaipan/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-27 00:33:17,334 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-27 00:33:17,334 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-10-27 00:33:17,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 00:33:17,375 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-27 00:33:17,375 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-27 00:33:17,375 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 00:33:17,375 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794f16d1-db77-43b9-9a12-a3766f4319dc/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 [2018-10-27 00:33:17,381 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-27 00:33:17,381 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-27 00:33:17,434 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-10-27 00:33:17,434 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-27 00:33:17,438 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 00:33:17,493 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 732 proven. 2 refuted. 0 times theorem prover too weak. 1007 trivial. 0 not checked. [2018-10-27 00:33:17,493 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 00:33:17,590 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1739 trivial. 0 not checked. [2018-10-27 00:33:17,606 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-27 00:33:17,606 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2018-10-27 00:33:17,606 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 00:33:17,608 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-27 00:33:17,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 00:33:17,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-27 00:33:17,608 INFO L87 Difference]: Start difference. First operand 100 states and 109 transitions. Second operand 6 states. [2018-10-27 00:33:17,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 00:33:17,814 INFO L93 Difference]: Finished difference Result 157 states and 174 transitions. [2018-10-27 00:33:17,815 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-27 00:33:17,815 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 183 [2018-10-27 00:33:17,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 00:33:17,816 INFO L225 Difference]: With dead ends: 157 [2018-10-27 00:33:17,816 INFO L226 Difference]: Without dead ends: 109 [2018-10-27 00:33:17,816 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 361 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-27 00:33:17,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-10-27 00:33:17,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-10-27 00:33:17,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-10-27 00:33:17,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 118 transitions. [2018-10-27 00:33:17,829 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 118 transitions. Word has length 183 [2018-10-27 00:33:17,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 00:33:17,829 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 118 transitions. [2018-10-27 00:33:17,829 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-27 00:33:17,830 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 118 transitions. [2018-10-27 00:33:17,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2018-10-27 00:33:17,831 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 00:33:17,832 INFO L375 BasicCegarLoop]: trace histogram [30, 27, 27, 15, 12, 11, 10, 10, 5, 4, 4, 3, 3, 3, 3, 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] [2018-10-27 00:33:17,832 INFO L424 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 00:33:17,832 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 00:33:17,832 INFO L82 PathProgramCache]: Analyzing trace with hash -1798476202, now seen corresponding path program 6 times [2018-10-27 00:33:17,832 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 00:33:17,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:33:17,836 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-27 00:33:17,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:33:17,836 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 00:33:17,857 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-27 00:33:17,857 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-27 00:33:17,857 INFO L171 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794f16d1-db77-43b9-9a12-a3766f4319dc/bin-2019/utaipan/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2018-10-27 00:33:17,866 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-27 00:33:17,866 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-27 00:33:17,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 00:33:17,942 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-27 00:33:17,942 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-27 00:33:17,942 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 00:33:17,942 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794f16d1-db77-43b9-9a12-a3766f4319dc/bin-2019/utaipan/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 00:33:17,950 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-27 00:33:17,950 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-10-27 00:33:18,007 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-27 00:33:18,008 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-27 00:33:18,011 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 00:33:18,086 INFO L134 CoverageAnalysis]: Checked inductivity of 1765 backedges. 454 proven. 36 refuted. 0 times theorem prover too weak. 1275 trivial. 0 not checked. [2018-10-27 00:33:18,087 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 00:33:18,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1765 backedges. 90 proven. 766 refuted. 0 times theorem prover too weak. 909 trivial. 0 not checked. [2018-10-27 00:33:18,215 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-27 00:33:18,215 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2018-10-27 00:33:18,215 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 00:33:18,216 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-27 00:33:18,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-27 00:33:18,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-27 00:33:18,216 INFO L87 Difference]: Start difference. First operand 109 states and 118 transitions. Second operand 12 states. [2018-10-27 00:33:18,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 00:33:18,293 INFO L93 Difference]: Finished difference Result 198 states and 223 transitions. [2018-10-27 00:33:18,294 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-27 00:33:18,294 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 192 [2018-10-27 00:33:18,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 00:33:18,295 INFO L225 Difference]: With dead ends: 198 [2018-10-27 00:33:18,295 INFO L226 Difference]: Without dead ends: 133 [2018-10-27 00:33:18,296 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 373 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-27 00:33:18,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-10-27 00:33:18,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-10-27 00:33:18,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-10-27 00:33:18,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 142 transitions. [2018-10-27 00:33:18,310 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 142 transitions. Word has length 192 [2018-10-27 00:33:18,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 00:33:18,310 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 142 transitions. [2018-10-27 00:33:18,310 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-27 00:33:18,310 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 142 transitions. [2018-10-27 00:33:18,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2018-10-27 00:33:18,315 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 00:33:18,315 INFO L375 BasicCegarLoop]: trace histogram [48, 45, 45, 30, 15, 11, 10, 10, 5, 4, 4, 3, 3, 3, 3, 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] [2018-10-27 00:33:18,315 INFO L424 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 00:33:18,315 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 00:33:18,315 INFO L82 PathProgramCache]: Analyzing trace with hash -282137940, now seen corresponding path program 7 times [2018-10-27 00:33:18,315 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 00:33:18,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:33:18,316 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-27 00:33:18,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:33:18,316 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 00:33:18,339 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-27 00:33:18,345 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-27 00:33:18,345 INFO L171 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794f16d1-db77-43b9-9a12-a3766f4319dc/bin-2019/utaipan/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-27 00:33:18,352 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 00:33:18,352 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-10-27 00:33:18,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 00:33:18,430 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-27 00:33:18,430 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-27 00:33:18,430 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 00:33:18,430 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794f16d1-db77-43b9-9a12-a3766f4319dc/bin-2019/utaipan/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 00:33:18,453 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 00:33:18,453 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 00:33:18,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 00:33:18,547 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 00:33:18,662 INFO L134 CoverageAnalysis]: Checked inductivity of 4429 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 4274 trivial. 0 not checked. [2018-10-27 00:33:18,662 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 00:33:18,829 INFO L134 CoverageAnalysis]: Checked inductivity of 4429 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 4274 trivial. 0 not checked. [2018-10-27 00:33:18,846 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-27 00:33:18,846 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2018-10-27 00:33:18,846 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 00:33:18,847 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-27 00:33:18,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-27 00:33:18,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-27 00:33:18,847 INFO L87 Difference]: Start difference. First operand 133 states and 142 transitions. Second operand 22 states. [2018-10-27 00:33:18,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 00:33:18,901 INFO L93 Difference]: Finished difference Result 256 states and 283 transitions. [2018-10-27 00:33:18,902 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-27 00:33:18,902 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 264 [2018-10-27 00:33:18,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 00:33:18,903 INFO L225 Difference]: With dead ends: 256 [2018-10-27 00:33:18,903 INFO L226 Difference]: Without dead ends: 163 [2018-10-27 00:33:18,903 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 527 GetRequests, 505 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-27 00:33:18,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-10-27 00:33:18,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2018-10-27 00:33:18,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-10-27 00:33:18,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 172 transitions. [2018-10-27 00:33:18,919 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 172 transitions. Word has length 264 [2018-10-27 00:33:18,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 00:33:18,919 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 172 transitions. [2018-10-27 00:33:18,919 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-27 00:33:18,919 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 172 transitions. [2018-10-27 00:33:18,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2018-10-27 00:33:18,925 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 00:33:18,926 INFO L375 BasicCegarLoop]: trace histogram [48, 45, 45, 30, 21, 20, 20, 15, 5, 4, 4, 3, 3, 3, 3, 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] [2018-10-27 00:33:18,926 INFO L424 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 00:33:18,926 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 00:33:18,926 INFO L82 PathProgramCache]: Analyzing trace with hash -190377492, now seen corresponding path program 8 times [2018-10-27 00:33:18,926 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 00:33:18,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:33:18,927 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 00:33:18,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:33:18,927 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 00:33:18,960 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-27 00:33:18,960 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-27 00:33:18,960 INFO L171 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794f16d1-db77-43b9-9a12-a3766f4319dc/bin-2019/utaipan/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-27 00:33:18,982 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-27 00:33:18,983 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-10-27 00:33:19,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 00:33:19,065 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-27 00:33:19,065 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-27 00:33:19,065 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 00:33:19,066 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794f16d1-db77-43b9-9a12-a3766f4319dc/bin-2019/utaipan/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 00:33:19,072 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-27 00:33:19,072 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-27 00:33:19,330 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-10-27 00:33:19,330 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-27 00:33:19,335 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 00:33:19,408 INFO L134 CoverageAnalysis]: Checked inductivity of 4884 backedges. 1932 proven. 26 refuted. 0 times theorem prover too weak. 2926 trivial. 0 not checked. [2018-10-27 00:33:19,408 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 00:33:19,509 INFO L134 CoverageAnalysis]: Checked inductivity of 4884 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 4858 trivial. 0 not checked. [2018-10-27 00:33:19,526 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-27 00:33:19,526 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2018-10-27 00:33:19,526 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 00:33:19,526 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-27 00:33:19,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-27 00:33:19,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-27 00:33:19,527 INFO L87 Difference]: Start difference. First operand 163 states and 172 transitions. Second operand 12 states. [2018-10-27 00:33:19,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 00:33:19,565 INFO L93 Difference]: Finished difference Result 253 states and 273 transitions. [2018-10-27 00:33:19,565 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-27 00:33:19,565 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 294 [2018-10-27 00:33:19,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 00:33:19,566 INFO L225 Difference]: With dead ends: 253 [2018-10-27 00:33:19,566 INFO L226 Difference]: Without dead ends: 181 [2018-10-27 00:33:19,566 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 587 GetRequests, 577 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-27 00:33:19,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2018-10-27 00:33:19,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2018-10-27 00:33:19,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-10-27 00:33:19,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 190 transitions. [2018-10-27 00:33:19,577 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 190 transitions. Word has length 294 [2018-10-27 00:33:19,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 00:33:19,578 INFO L481 AbstractCegarLoop]: Abstraction has 181 states and 190 transitions. [2018-10-27 00:33:19,578 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-27 00:33:19,578 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 190 transitions. [2018-10-27 00:33:19,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2018-10-27 00:33:19,581 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 00:33:19,581 INFO L375 BasicCegarLoop]: trace histogram [48, 45, 45, 30, 21, 20, 20, 15, 11, 10, 10, 3, 3, 3, 3, 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] [2018-10-27 00:33:19,581 INFO L424 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 00:33:19,581 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 00:33:19,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1614487372, now seen corresponding path program 9 times [2018-10-27 00:33:19,582 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 00:33:19,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:33:19,582 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-27 00:33:19,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:33:19,582 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 00:33:19,610 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-27 00:33:19,610 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-27 00:33:19,611 INFO L171 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794f16d1-db77-43b9-9a12-a3766f4319dc/bin-2019/utaipan/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-27 00:33:19,623 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-27 00:33:19,623 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-10-27 00:33:19,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 00:33:19,697 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-27 00:33:19,697 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-27 00:33:19,697 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 00:33:19,698 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794f16d1-db77-43b9-9a12-a3766f4319dc/bin-2019/utaipan/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 00:33:19,705 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-27 00:33:19,705 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-10-27 00:33:19,757 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-27 00:33:19,758 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-27 00:33:19,762 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 00:33:19,850 INFO L134 CoverageAnalysis]: Checked inductivity of 5013 backedges. 1540 proven. 210 refuted. 0 times theorem prover too weak. 3263 trivial. 0 not checked. [2018-10-27 00:33:19,850 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 00:33:19,978 INFO L134 CoverageAnalysis]: Checked inductivity of 5013 backedges. 204 proven. 2140 refuted. 0 times theorem prover too weak. 2669 trivial. 0 not checked. [2018-10-27 00:33:19,993 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-27 00:33:19,994 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-10-27 00:33:19,994 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 00:33:19,994 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-27 00:33:19,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-27 00:33:19,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-27 00:33:19,995 INFO L87 Difference]: Start difference. First operand 181 states and 190 transitions. Second operand 13 states. [2018-10-27 00:33:20,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 00:33:20,051 INFO L93 Difference]: Finished difference Result 292 states and 312 transitions. [2018-10-27 00:33:20,053 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-27 00:33:20,053 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 312 [2018-10-27 00:33:20,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 00:33:20,055 INFO L225 Difference]: With dead ends: 292 [2018-10-27 00:33:20,056 INFO L226 Difference]: Without dead ends: 185 [2018-10-27 00:33:20,056 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 623 GetRequests, 602 SyntacticMatches, 10 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-27 00:33:20,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2018-10-27 00:33:20,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2018-10-27 00:33:20,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2018-10-27 00:33:20,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 194 transitions. [2018-10-27 00:33:20,074 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 194 transitions. Word has length 312 [2018-10-27 00:33:20,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 00:33:20,074 INFO L481 AbstractCegarLoop]: Abstraction has 185 states and 194 transitions. [2018-10-27 00:33:20,074 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-27 00:33:20,075 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 194 transitions. [2018-10-27 00:33:20,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2018-10-27 00:33:20,078 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 00:33:20,078 INFO L375 BasicCegarLoop]: trace histogram [51, 48, 48, 33, 21, 20, 20, 15, 11, 10, 10, 3, 3, 3, 3, 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] [2018-10-27 00:33:20,079 INFO L424 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 00:33:20,079 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 00:33:20,079 INFO L82 PathProgramCache]: Analyzing trace with hash 1924058437, now seen corresponding path program 10 times [2018-10-27 00:33:20,079 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 00:33:20,081 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:33:20,082 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-27 00:33:20,082 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:33:20,082 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 00:33:20,120 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-27 00:33:20,123 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-27 00:33:20,123 INFO L171 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794f16d1-db77-43b9-9a12-a3766f4319dc/bin-2019/utaipan/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-27 00:33:20,164 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 00:33:20,164 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-10-27 00:33:20,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 00:33:20,248 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-27 00:33:20,248 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-27 00:33:20,248 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 00:33:20,248 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794f16d1-db77-43b9-9a12-a3766f4319dc/bin-2019/utaipan/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 00:33:20,254 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 00:33:20,254 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 00:33:20,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 00:33:20,345 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 00:33:20,533 INFO L134 CoverageAnalysis]: Checked inductivity of 5583 backedges. 2182 proven. 512 refuted. 0 times theorem prover too weak. 2889 trivial. 0 not checked. [2018-10-27 00:33:20,533 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 00:33:20,742 INFO L134 CoverageAnalysis]: Checked inductivity of 5583 backedges. 0 proven. 2698 refuted. 0 times theorem prover too weak. 2885 trivial. 0 not checked. [2018-10-27 00:33:20,758 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-27 00:33:20,758 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 22 [2018-10-27 00:33:20,758 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 00:33:20,759 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-27 00:33:20,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-27 00:33:20,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-27 00:33:20,759 INFO L87 Difference]: Start difference. First operand 185 states and 194 transitions. Second operand 22 states. [2018-10-27 00:33:20,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 00:33:20,856 INFO L93 Difference]: Finished difference Result 312 states and 339 transitions. [2018-10-27 00:33:20,860 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-27 00:33:20,861 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 324 [2018-10-27 00:33:20,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 00:33:20,862 INFO L225 Difference]: With dead ends: 312 [2018-10-27 00:33:20,862 INFO L226 Difference]: Without dead ends: 201 [2018-10-27 00:33:20,863 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 647 GetRequests, 613 SyntacticMatches, 14 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-27 00:33:20,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2018-10-27 00:33:20,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2018-10-27 00:33:20,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2018-10-27 00:33:20,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 214 transitions. [2018-10-27 00:33:20,878 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 214 transitions. Word has length 324 [2018-10-27 00:33:20,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 00:33:20,879 INFO L481 AbstractCegarLoop]: Abstraction has 201 states and 214 transitions. [2018-10-27 00:33:20,879 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-27 00:33:20,879 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 214 transitions. [2018-10-27 00:33:20,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 373 [2018-10-27 00:33:20,883 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 00:33:20,883 INFO L375 BasicCegarLoop]: trace histogram [63, 60, 60, 33, 27, 21, 20, 20, 11, 10, 10, 3, 3, 3, 3, 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] [2018-10-27 00:33:20,883 INFO L424 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 00:33:20,883 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 00:33:20,884 INFO L82 PathProgramCache]: Analyzing trace with hash 1265522465, now seen corresponding path program 11 times [2018-10-27 00:33:20,884 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 00:33:20,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:33:20,884 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 00:33:20,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:33:20,885 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 00:33:20,911 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-27 00:33:20,911 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-27 00:33:20,911 INFO L171 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794f16d1-db77-43b9-9a12-a3766f4319dc/bin-2019/utaipan/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2018-10-27 00:33:20,924 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-27 00:33:20,924 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-27 00:33:20,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 00:33:21,017 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-27 00:33:21,017 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-27 00:33:21,017 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 00:33:21,017 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794f16d1-db77-43b9-9a12-a3766f4319dc/bin-2019/utaipan/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 00:33:21,024 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-27 00:33:21,024 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-27 00:33:22,426 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-10-27 00:33:22,426 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-27 00:33:22,433 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 00:33:22,579 INFO L134 CoverageAnalysis]: Checked inductivity of 8223 backedges. 3372 proven. 155 refuted. 0 times theorem prover too weak. 4696 trivial. 0 not checked. [2018-10-27 00:33:22,579 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 00:33:22,798 INFO L134 CoverageAnalysis]: Checked inductivity of 8223 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 8068 trivial. 0 not checked. [2018-10-27 00:33:22,816 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-27 00:33:22,816 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2018-10-27 00:33:22,816 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 00:33:22,817 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-27 00:33:22,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-27 00:33:22,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-10-27 00:33:22,818 INFO L87 Difference]: Start difference. First operand 201 states and 214 transitions. Second operand 21 states. [2018-10-27 00:33:22,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 00:33:22,911 INFO L93 Difference]: Finished difference Result 320 states and 351 transitions. [2018-10-27 00:33:22,911 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-27 00:33:22,912 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 372 [2018-10-27 00:33:22,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 00:33:22,913 INFO L225 Difference]: With dead ends: 320 [2018-10-27 00:33:22,913 INFO L226 Difference]: Without dead ends: 228 [2018-10-27 00:33:22,913 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 743 GetRequests, 721 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-10-27 00:33:22,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2018-10-27 00:33:22,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 228. [2018-10-27 00:33:22,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2018-10-27 00:33:22,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 241 transitions. [2018-10-27 00:33:22,927 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 241 transitions. Word has length 372 [2018-10-27 00:33:22,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 00:33:22,928 INFO L481 AbstractCegarLoop]: Abstraction has 228 states and 241 transitions. [2018-10-27 00:33:22,928 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-27 00:33:22,928 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 241 transitions. [2018-10-27 00:33:22,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 400 [2018-10-27 00:33:22,932 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 00:33:22,932 INFO L375 BasicCegarLoop]: trace histogram [63, 60, 60, 33, 27, 21, 20, 20, 20, 19, 19, 3, 3, 3, 3, 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] [2018-10-27 00:33:22,932 INFO L424 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 00:33:22,933 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 00:33:22,933 INFO L82 PathProgramCache]: Analyzing trace with hash -274838592, now seen corresponding path program 12 times [2018-10-27 00:33:22,933 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 00:33:22,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:33:22,933 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-27 00:33:22,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:33:22,934 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 00:33:22,957 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-27 00:33:22,957 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-27 00:33:22,957 INFO L171 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794f16d1-db77-43b9-9a12-a3766f4319dc/bin-2019/utaipan/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2018-10-27 00:33:22,974 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-27 00:33:22,974 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-27 00:33:25,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2018-10-27 00:33:25,106 INFO L285 seRefinementStrategy]: Strategy TaipanRefinementStrategy was unsuccessful and could not determine trace feasibility. [2018-10-27 00:33:25,106 INFO L442 BasicCegarLoop]: Counterexample might be feasible [2018-10-27 00:33:25,144 WARN L208 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2018-10-27 00:33:25,145 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 12:33:25 BoogieIcfgContainer [2018-10-27 00:33:25,145 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-27 00:33:25,145 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-10-27 00:33:25,145 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-10-27 00:33:25,145 INFO L276 PluginConnector]: Witness Printer initialized [2018-10-27 00:33:25,146 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:32:58" (3/4) ... [2018-10-27 00:33:25,151 INFO L147 WitnessPrinter]: No result that supports witness generation found [2018-10-27 00:33:25,151 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-10-27 00:33:25,152 INFO L168 Benchmark]: Toolchain (without parser) took 27154.62 ms. Allocated memory was 1.0 GB in the beginning and 2.1 GB in the end (delta: 1.1 GB). Free memory was 954.8 MB in the beginning and 2.0 GB in the end (delta: -1.1 GB). There was no memory consumed. Max. memory is 11.5 GB. [2018-10-27 00:33:25,153 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 980.1 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-27 00:33:25,154 INFO L168 Benchmark]: CACSL2BoogieTranslator took 230.83 ms. Allocated memory is still 1.0 GB. Free memory was 954.8 MB in the beginning and 943.0 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 11.5 GB. [2018-10-27 00:33:25,154 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.22 ms. Allocated memory is still 1.0 GB. Free memory was 943.0 MB in the beginning and 940.3 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-10-27 00:33:25,154 INFO L168 Benchmark]: Boogie Preprocessor took 43.50 ms. Allocated memory is still 1.0 GB. Free memory was 940.3 MB in the beginning and 937.7 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-10-27 00:33:25,155 INFO L168 Benchmark]: RCFGBuilder took 596.28 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 187.2 MB). Free memory was 937.7 MB in the beginning and 1.2 GB in the end (delta: -220.2 MB). Peak memory consumption was 15.5 MB. Max. memory is 11.5 GB. [2018-10-27 00:33:25,155 INFO L168 Benchmark]: TraceAbstraction took 26232.30 ms. Allocated memory was 1.2 GB in the beginning and 2.1 GB in the end (delta: 874.0 MB). Free memory was 1.2 GB in the beginning and 2.0 GB in the end (delta: -873.8 MB). Peak memory consumption was 149.0 kB. Max. memory is 11.5 GB. [2018-10-27 00:33:25,156 INFO L168 Benchmark]: Witness Printer took 5.96 ms. Allocated memory is still 2.1 GB. Free memory is still 2.0 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-27 00:33:25,161 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 980.1 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 230.83 ms. Allocated memory is still 1.0 GB. Free memory was 954.8 MB in the beginning and 943.0 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 41.22 ms. Allocated memory is still 1.0 GB. Free memory was 943.0 MB in the beginning and 940.3 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 43.50 ms. Allocated memory is still 1.0 GB. Free memory was 940.3 MB in the beginning and 937.7 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 596.28 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 187.2 MB). Free memory was 937.7 MB in the beginning and 1.2 GB in the end (delta: -220.2 MB). Peak memory consumption was 15.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 26232.30 ms. Allocated memory was 1.2 GB in the beginning and 2.1 GB in the end (delta: 874.0 MB). Free memory was 1.2 GB in the beginning and 2.0 GB in the end (delta: -873.8 MB). Peak memory consumption was 149.0 kB. Max. memory is 11.5 GB. * Witness Printer took 5.96 ms. Allocated memory is still 2.1 GB. Free memory is still 2.0 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 50]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L31] CALL int x[20]; [L31] RET int x[20]; [L32] CALL init_nondet(x) [L5] int i; [L6] i = 0 [L6] COND TRUE i < 20 [L7] CALL x[i] = __VERIFIER_nondet_int() [L7] RET x[i] = __VERIFIER_nondet_int() [L6] i++ [L6] COND TRUE i < 20 [L7] CALL x[i] = __VERIFIER_nondet_int() [L7] RET x[i] = __VERIFIER_nondet_int() [L6] i++ [L6] COND TRUE i < 20 [L7] CALL x[i] = __VERIFIER_nondet_int() [L7] RET x[i] = __VERIFIER_nondet_int() [L6] i++ [L6] COND TRUE i < 20 [L7] CALL x[i] = __VERIFIER_nondet_int() [L7] RET x[i] = __VERIFIER_nondet_int() [L6] i++ [L6] COND TRUE i < 20 [L7] CALL x[i] = __VERIFIER_nondet_int() [L7] RET x[i] = __VERIFIER_nondet_int() [L6] i++ [L6] COND TRUE i < 20 [L7] CALL x[i] = __VERIFIER_nondet_int() [L7] RET x[i] = __VERIFIER_nondet_int() [L6] i++ [L6] COND TRUE i < 20 [L7] CALL x[i] = __VERIFIER_nondet_int() [L7] RET x[i] = __VERIFIER_nondet_int() [L6] i++ [L6] COND TRUE i < 20 [L7] CALL x[i] = __VERIFIER_nondet_int() [L7] RET x[i] = __VERIFIER_nondet_int() [L6] i++ [L6] COND TRUE i < 20 [L7] CALL x[i] = __VERIFIER_nondet_int() [L7] RET x[i] = __VERIFIER_nondet_int() [L6] i++ [L6] COND TRUE i < 20 [L7] CALL x[i] = __VERIFIER_nondet_int() [L7] RET x[i] = __VERIFIER_nondet_int() [L6] i++ [L6] COND TRUE i < 20 [L7] CALL x[i] = __VERIFIER_nondet_int() [L7] RET x[i] = __VERIFIER_nondet_int() [L6] i++ [L6] COND TRUE i < 20 [L7] CALL x[i] = __VERIFIER_nondet_int() [L7] RET x[i] = __VERIFIER_nondet_int() [L6] i++ [L6] COND TRUE i < 20 [L7] CALL x[i] = __VERIFIER_nondet_int() [L7] RET x[i] = __VERIFIER_nondet_int() [L6] i++ [L6] COND TRUE i < 20 [L7] CALL x[i] = __VERIFIER_nondet_int() [L7] RET x[i] = __VERIFIER_nondet_int() [L6] i++ [L6] COND TRUE i < 20 [L7] CALL x[i] = __VERIFIER_nondet_int() [L7] RET x[i] = __VERIFIER_nondet_int() [L6] i++ [L6] COND TRUE i < 20 [L7] CALL x[i] = __VERIFIER_nondet_int() [L7] RET x[i] = __VERIFIER_nondet_int() [L6] i++ [L6] COND TRUE i < 20 [L7] CALL x[i] = __VERIFIER_nondet_int() [L7] RET x[i] = __VERIFIER_nondet_int() [L6] i++ [L6] COND TRUE i < 20 [L7] CALL x[i] = __VERIFIER_nondet_int() [L7] RET x[i] = __VERIFIER_nondet_int() [L6] i++ [L6] COND TRUE i < 20 [L7] CALL x[i] = __VERIFIER_nondet_int() [L7] RET x[i] = __VERIFIER_nondet_int() [L6] i++ [L6] COND TRUE i < 20 [L7] CALL x[i] = __VERIFIER_nondet_int() [L7] RET x[i] = __VERIFIER_nondet_int() [L6] i++ [L6] COND FALSE, RET !(i < 20) [L32] init_nondet(x) [L33] int temp; [L34] int ret; [L35] int ret2; [L36] int ret5; [L38] CALL, EXPR rangesum(x) [L13] int i; [L14] long long ret; [L15] ret = 0 [L16] int cnt = 0; [L17] i = 0 [L17] COND TRUE i < 20 [L18] COND FALSE !(i > 20/2) [L17] i++ [L17] COND TRUE i < 20 [L18] COND FALSE !(i > 20/2) [L17] i++ [L17] COND TRUE i < 20 [L18] COND FALSE !(i > 20/2) [L17] i++ [L17] COND TRUE i < 20 [L18] COND FALSE !(i > 20/2) [L17] i++ [L17] COND TRUE i < 20 [L18] COND FALSE !(i > 20/2) [L17] i++ [L17] COND TRUE i < 20 [L18] COND FALSE !(i > 20/2) [L17] i++ [L17] COND TRUE i < 20 [L18] COND FALSE !(i > 20/2) [L17] i++ [L17] COND TRUE i < 20 [L18] COND FALSE !(i > 20/2) [L17] i++ [L17] COND TRUE i < 20 [L18] COND FALSE !(i > 20/2) [L17] i++ [L17] COND TRUE i < 20 [L18] COND FALSE !(i > 20/2) [L17] i++ [L17] COND TRUE i < 20 [L18] COND FALSE !(i > 20/2) [L17] i++ [L17] COND TRUE i < 20 [L18] COND TRUE i > 20/2 [L19] CALL, EXPR x[i] [L19] RET, EXPR x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND TRUE i < 20 [L18] COND TRUE i > 20/2 [L19] CALL, EXPR x[i] [L19] RET, EXPR x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND TRUE i < 20 [L18] COND TRUE i > 20/2 [L19] CALL, EXPR x[i] [L19] RET, EXPR x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND TRUE i < 20 [L18] COND TRUE i > 20/2 [L19] CALL, EXPR x[i] [L19] RET, EXPR x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND TRUE i < 20 [L18] COND TRUE i > 20/2 [L19] CALL, EXPR x[i] [L19] RET, EXPR x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND TRUE i < 20 [L18] COND TRUE i > 20/2 [L19] CALL, EXPR x[i] [L19] RET, EXPR x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND TRUE i < 20 [L18] COND TRUE i > 20/2 [L19] CALL, EXPR x[i] [L19] RET, EXPR x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND TRUE i < 20 [L18] COND TRUE i > 20/2 [L19] CALL, EXPR x[i] [L19] RET, EXPR x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND TRUE i < 20 [L18] COND TRUE i > 20/2 [L19] CALL, EXPR x[i] [L19] RET, EXPR x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND FALSE !(i < 20) [L23] COND TRUE cnt !=0 [L24] RET return ret / cnt; [L38] EXPR rangesum(x) [L38] ret = rangesum(x) [L40] CALL, EXPR x[0] [L40] RET, EXPR x[0] [L40] temp=x[0] [L40] CALL, EXPR x[1] [L40] RET, EXPR x[1] [L40] CALL x[0] = x[1] [L40] RET x[0] = x[1] [L40] CALL x[1] = temp [L40] RET x[1] = temp [L41] CALL, EXPR rangesum(x) [L13] int i; [L14] long long ret; [L15] ret = 0 [L16] int cnt = 0; [L17] i = 0 [L17] COND TRUE i < 20 [L18] COND FALSE !(i > 20/2) [L17] i++ [L17] COND TRUE i < 20 [L18] COND FALSE !(i > 20/2) [L17] i++ [L17] COND TRUE i < 20 [L18] COND FALSE !(i > 20/2) [L17] i++ [L17] COND TRUE i < 20 [L18] COND FALSE !(i > 20/2) [L17] i++ [L17] COND TRUE i < 20 [L18] COND FALSE !(i > 20/2) [L17] i++ [L17] COND TRUE i < 20 [L18] COND FALSE !(i > 20/2) [L17] i++ [L17] COND TRUE i < 20 [L18] COND FALSE !(i > 20/2) [L17] i++ [L17] COND TRUE i < 20 [L18] COND FALSE !(i > 20/2) [L17] i++ [L17] COND TRUE i < 20 [L18] COND FALSE !(i > 20/2) [L17] i++ [L17] COND TRUE i < 20 [L18] COND FALSE !(i > 20/2) [L17] i++ [L17] COND TRUE i < 20 [L18] COND FALSE !(i > 20/2) [L17] i++ [L17] COND TRUE i < 20 [L18] COND TRUE i > 20/2 [L19] CALL, EXPR x[i] [L19] RET, EXPR x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND TRUE i < 20 [L18] COND TRUE i > 20/2 [L19] CALL, EXPR x[i] [L19] RET, EXPR x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND TRUE i < 20 [L18] COND TRUE i > 20/2 [L19] CALL, EXPR x[i] [L19] RET, EXPR x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND TRUE i < 20 [L18] COND TRUE i > 20/2 [L19] CALL, EXPR x[i] [L19] RET, EXPR x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND TRUE i < 20 [L18] COND TRUE i > 20/2 [L19] CALL, EXPR x[i] [L19] RET, EXPR x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND TRUE i < 20 [L18] COND TRUE i > 20/2 [L19] CALL, EXPR x[i] [L19] RET, EXPR x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND TRUE i < 20 [L18] COND TRUE i > 20/2 [L19] CALL, EXPR x[i] [L19] RET, EXPR x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND TRUE i < 20 [L18] COND TRUE i > 20/2 [L19] CALL, EXPR x[i] [L19] RET, EXPR x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND TRUE i < 20 [L18] COND TRUE i > 20/2 [L19] CALL, EXPR x[i] [L19] RET, EXPR x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND FALSE !(i < 20) [L23] COND TRUE cnt !=0 [L24] RET return ret / cnt; [L41] EXPR rangesum(x) [L41] ret2 = rangesum(x) [L42] CALL, EXPR x[0] [L42] RET, EXPR x[0] [L42] temp=x[0] [L43] int i =0 ; [L43] COND TRUE i<20 -1 [L44] CALL, EXPR x[i+1] [L44] RET, EXPR x[i+1] [L44] CALL x[i] = x[i+1] [L44] RET x[i] = x[i+1] [L43] i++ [L43] COND TRUE i<20 -1 [L44] CALL, EXPR x[i+1] [L44] RET, EXPR x[i+1] [L44] CALL x[i] = x[i+1] [L44] RET x[i] = x[i+1] [L43] i++ [L43] COND TRUE i<20 -1 [L44] CALL, EXPR x[i+1] [L44] RET, EXPR x[i+1] [L44] CALL x[i] = x[i+1] [L44] RET x[i] = x[i+1] [L43] i++ [L43] COND TRUE i<20 -1 [L44] CALL, EXPR x[i+1] [L44] RET, EXPR x[i+1] [L44] CALL x[i] = x[i+1] [L44] RET x[i] = x[i+1] [L43] i++ [L43] COND TRUE i<20 -1 [L44] CALL, EXPR x[i+1] [L44] RET, EXPR x[i+1] [L44] CALL x[i] = x[i+1] [L44] RET x[i] = x[i+1] [L43] i++ [L43] COND TRUE i<20 -1 [L44] CALL, EXPR x[i+1] [L44] RET, EXPR x[i+1] [L44] CALL x[i] = x[i+1] [L44] RET x[i] = x[i+1] [L43] i++ [L43] COND TRUE i<20 -1 [L44] CALL, EXPR x[i+1] [L44] RET, EXPR x[i+1] [L44] CALL x[i] = x[i+1] [L44] RET x[i] = x[i+1] [L43] i++ [L43] COND TRUE i<20 -1 [L44] CALL, EXPR x[i+1] [L44] RET, EXPR x[i+1] [L44] CALL x[i] = x[i+1] [L44] RET x[i] = x[i+1] [L43] i++ [L43] COND TRUE i<20 -1 [L44] CALL, EXPR x[i+1] [L44] RET, EXPR x[i+1] [L44] CALL x[i] = x[i+1] [L44] RET x[i] = x[i+1] [L43] i++ [L43] COND TRUE i<20 -1 [L44] CALL, EXPR x[i+1] [L44] RET, EXPR x[i+1] [L44] CALL x[i] = x[i+1] [L44] RET x[i] = x[i+1] [L43] i++ [L43] COND TRUE i<20 -1 [L44] CALL, EXPR x[i+1] [L44] RET, EXPR x[i+1] [L44] CALL x[i] = x[i+1] [L44] RET x[i] = x[i+1] [L43] i++ [L43] COND TRUE i<20 -1 [L44] CALL, EXPR x[i+1] [L44] RET, EXPR x[i+1] [L44] CALL x[i] = x[i+1] [L44] RET x[i] = x[i+1] [L43] i++ [L43] COND TRUE i<20 -1 [L44] CALL, EXPR x[i+1] [L44] RET, EXPR x[i+1] [L44] CALL x[i] = x[i+1] [L44] RET x[i] = x[i+1] [L43] i++ [L43] COND TRUE i<20 -1 [L44] CALL, EXPR x[i+1] [L44] RET, EXPR x[i+1] [L44] CALL x[i] = x[i+1] [L44] RET x[i] = x[i+1] [L43] i++ [L43] COND TRUE i<20 -1 [L44] CALL, EXPR x[i+1] [L44] RET, EXPR x[i+1] [L44] CALL x[i] = x[i+1] [L44] RET x[i] = x[i+1] [L43] i++ [L43] COND TRUE i<20 -1 [L44] CALL, EXPR x[i+1] [L44] RET, EXPR x[i+1] [L44] CALL x[i] = x[i+1] [L44] RET x[i] = x[i+1] [L43] i++ [L43] COND TRUE i<20 -1 [L44] CALL, EXPR x[i+1] [L44] RET, EXPR x[i+1] [L44] CALL x[i] = x[i+1] [L44] RET x[i] = x[i+1] [L43] i++ [L43] COND TRUE i<20 -1 [L44] CALL, EXPR x[i+1] [L44] RET, EXPR x[i+1] [L44] CALL x[i] = x[i+1] [L44] RET x[i] = x[i+1] [L43] i++ [L43] COND TRUE i<20 -1 [L44] CALL, EXPR x[i+1] [L44] RET, EXPR x[i+1] [L44] CALL x[i] = x[i+1] [L44] RET x[i] = x[i+1] [L43] i++ [L43] COND FALSE !(i<20 -1) [L46] CALL x[20 -1] = temp [L46] RET x[20 -1] = temp [L47] CALL, EXPR rangesum(x) [L13] int i; [L14] long long ret; [L15] ret = 0 [L16] int cnt = 0; [L17] i = 0 [L17] COND TRUE i < 20 [L18] COND FALSE !(i > 20/2) [L17] i++ [L17] COND TRUE i < 20 [L18] COND FALSE !(i > 20/2) [L17] i++ [L17] COND TRUE i < 20 [L18] COND FALSE !(i > 20/2) [L17] i++ [L17] COND TRUE i < 20 [L18] COND FALSE !(i > 20/2) [L17] i++ [L17] COND TRUE i < 20 [L18] COND FALSE !(i > 20/2) [L17] i++ [L17] COND TRUE i < 20 [L18] COND FALSE !(i > 20/2) [L17] i++ [L17] COND TRUE i < 20 [L18] COND FALSE !(i > 20/2) [L17] i++ [L17] COND TRUE i < 20 [L18] COND FALSE !(i > 20/2) [L17] i++ [L17] COND TRUE i < 20 [L18] COND FALSE !(i > 20/2) [L17] i++ [L17] COND TRUE i < 20 [L18] COND FALSE !(i > 20/2) [L17] i++ [L17] COND TRUE i < 20 [L18] COND FALSE !(i > 20/2) [L17] i++ [L17] COND TRUE i < 20 [L18] COND TRUE i > 20/2 [L19] CALL, EXPR x[i] [L19] RET, EXPR x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND TRUE i < 20 [L18] COND TRUE i > 20/2 [L19] CALL, EXPR x[i] [L19] RET, EXPR x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND TRUE i < 20 [L18] COND TRUE i > 20/2 [L19] CALL, EXPR x[i] [L19] RET, EXPR x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND TRUE i < 20 [L18] COND TRUE i > 20/2 [L19] CALL, EXPR x[i] [L19] RET, EXPR x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND TRUE i < 20 [L18] COND TRUE i > 20/2 [L19] CALL, EXPR x[i] [L19] RET, EXPR x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND TRUE i < 20 [L18] COND TRUE i > 20/2 [L19] CALL, EXPR x[i] [L19] RET, EXPR x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND TRUE i < 20 [L18] COND TRUE i > 20/2 [L19] CALL, EXPR x[i] [L19] RET, EXPR x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND TRUE i < 20 [L18] COND TRUE i > 20/2 [L19] CALL, EXPR x[i] [L19] RET, EXPR x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND TRUE i < 20 [L18] COND TRUE i > 20/2 [L19] CALL, EXPR x[i] [L19] RET, EXPR x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND FALSE !(i < 20) [L23] COND TRUE cnt !=0 [L24] RET return ret / cnt; [L47] EXPR rangesum(x) [L47] ret5 = rangesum(x) [L49] COND TRUE ret != ret2 || ret !=ret5 [L50] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 40 locations, 1 error locations. UNKNOWN Result, 26.1s OverallTime, 17 OverallIterations, 63 TraceHistogramMax, 10.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 552 SDtfs, 391 SDslu, 1652 SDs, 0 SdLazy, 385 SolverSat, 130 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.8s Time, PredicateUnifierStatistics: 10 DeclaredPredicates, 5030 GetRequests, 4829 SyntacticMatches, 29 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 4.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=228occurred in iteration=16, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 3.9s AbstIntTime, 6 AbstIntIterations, 5 AbstIntStrong, 0.9726047715521402 AbsIntWeakeningRatio, 1.6408163265306122 AbsIntAvgWeakeningVarsNumRemoved, 42.74285714285714 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 16 MinimizatonAttempts, 8 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.5s SsaConstructionTime, 4.5s SatisfiabilityAnalysisTime, 2.6s InterpolantComputationTime, 5425 NumberOfCodeBlocks, 4705 NumberOfCodeBlocksAsserted, 48 NumberOfCheckSat, 4754 ConstructedInterpolants, 0 QuantifiedInterpolants, 1506978 SizeOfPredicates, 13 NumberOfNonLiveVariables, 5991 ConjunctsInSsa, 102 ConjunctsInUnsatCore, 22 InterpolantComputations, 0 PerfectInterpolantSequences, 61100/68552 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...