./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/sum01_false-unreach-call_true-termination.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 635dfa2a Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_3c667272-8737-43c0-b2b7-62ee309e25a3/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_3c667272-8737-43c0-b2b7-62ee309e25a3/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_3c667272-8737-43c0-b2b7-62ee309e25a3/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_3c667272-8737-43c0-b2b7-62ee309e25a3/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops/sum01_false-unreach-call_true-termination.i -s /tmp/vcloud-vcloud-master/worker/working_dir_3c667272-8737-43c0-b2b7-62ee309e25a3/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_3c667272-8737-43c0-b2b7-62ee309e25a3/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 5cba8acfa381c990ec40e4bf9e5d202ee845a576 ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.23-635dfa2 [2018-12-02 06:19:46,445 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-02 06:19:46,445 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-02 06:19:46,451 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-02 06:19:46,452 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-02 06:19:46,452 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-02 06:19:46,453 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-02 06:19:46,454 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-02 06:19:46,455 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-02 06:19:46,455 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-02 06:19:46,456 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-02 06:19:46,456 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-02 06:19:46,457 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-02 06:19:46,457 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-02 06:19:46,458 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-02 06:19:46,458 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-02 06:19:46,459 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-02 06:19:46,460 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-02 06:19:46,461 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-02 06:19:46,462 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-02 06:19:46,462 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-02 06:19:46,463 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-02 06:19:46,464 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-02 06:19:46,464 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-02 06:19:46,464 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-02 06:19:46,465 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-02 06:19:46,465 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-02 06:19:46,466 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-02 06:19:46,466 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-02 06:19:46,467 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-02 06:19:46,467 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-02 06:19:46,468 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-02 06:19:46,468 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-02 06:19:46,468 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-02 06:19:46,468 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-02 06:19:46,469 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-02 06:19:46,469 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_3c667272-8737-43c0-b2b7-62ee309e25a3/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-12-02 06:19:46,476 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-02 06:19:46,477 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-02 06:19:46,477 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-02 06:19:46,477 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-02 06:19:46,477 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-02 06:19:46,477 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-02 06:19:46,478 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-02 06:19:46,478 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-02 06:19:46,478 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-02 06:19:46,478 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-02 06:19:46,478 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-02 06:19:46,478 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-12-02 06:19:46,478 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-02 06:19:46,479 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-02 06:19:46,479 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-02 06:19:46,479 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-02 06:19:46,479 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-02 06:19:46,479 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-02 06:19:46,479 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-02 06:19:46,479 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-02 06:19:46,479 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-02 06:19:46,480 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-02 06:19:46,480 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-02 06:19:46,480 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-02 06:19:46,480 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-02 06:19:46,480 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-02 06:19:46,480 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-02 06:19:46,480 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-02 06:19:46,480 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-02 06:19:46,481 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-02 06:19:46,481 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-02 06:19:46,481 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-02 06:19:46,481 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-02 06:19:46,481 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-02 06:19:46,481 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-02 06:19:46,481 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-12-02 06:19:46,481 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_3c667272-8737-43c0-b2b7-62ee309e25a3/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 -> 5cba8acfa381c990ec40e4bf9e5d202ee845a576 [2018-12-02 06:19:46,499 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-02 06:19:46,505 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-02 06:19:46,507 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-02 06:19:46,508 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-02 06:19:46,508 INFO L276 PluginConnector]: CDTParser initialized [2018-12-02 06:19:46,509 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_3c667272-8737-43c0-b2b7-62ee309e25a3/bin-2019/utaipan/../../sv-benchmarks/c/loops/sum01_false-unreach-call_true-termination.i [2018-12-02 06:19:46,547 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_3c667272-8737-43c0-b2b7-62ee309e25a3/bin-2019/utaipan/data/4e21e5894/f73f28a4ebad4e289ae4ab618fd5a53a/FLAG1c4cb92e5 [2018-12-02 06:19:46,958 INFO L307 CDTParser]: Found 1 translation units. [2018-12-02 06:19:46,959 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_3c667272-8737-43c0-b2b7-62ee309e25a3/sv-benchmarks/c/loops/sum01_false-unreach-call_true-termination.i [2018-12-02 06:19:46,962 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_3c667272-8737-43c0-b2b7-62ee309e25a3/bin-2019/utaipan/data/4e21e5894/f73f28a4ebad4e289ae4ab618fd5a53a/FLAG1c4cb92e5 [2018-12-02 06:19:46,970 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_3c667272-8737-43c0-b2b7-62ee309e25a3/bin-2019/utaipan/data/4e21e5894/f73f28a4ebad4e289ae4ab618fd5a53a [2018-12-02 06:19:46,972 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-02 06:19:46,972 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-02 06:19:46,973 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-02 06:19:46,973 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-02 06:19:46,975 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-02 06:19:46,975 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 06:19:46" (1/1) ... [2018-12-02 06:19:46,977 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3033e242 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:19:46, skipping insertion in model container [2018-12-02 06:19:46,977 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 06:19:46" (1/1) ... [2018-12-02 06:19:46,981 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-02 06:19:46,990 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-02 06:19:47,071 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-02 06:19:47,073 INFO L191 MainTranslator]: Completed pre-run [2018-12-02 06:19:47,081 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-02 06:19:47,089 INFO L195 MainTranslator]: Completed translation [2018-12-02 06:19:47,089 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:19:47 WrapperNode [2018-12-02 06:19:47,089 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-02 06:19:47,090 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-02 06:19:47,090 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-02 06:19:47,090 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-02 06:19:47,095 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:19:47" (1/1) ... [2018-12-02 06:19:47,097 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:19:47" (1/1) ... [2018-12-02 06:19:47,101 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-02 06:19:47,101 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-02 06:19:47,102 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-02 06:19:47,102 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-02 06:19:47,107 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:19:47" (1/1) ... [2018-12-02 06:19:47,107 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:19:47" (1/1) ... [2018-12-02 06:19:47,107 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:19:47" (1/1) ... [2018-12-02 06:19:47,108 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:19:47" (1/1) ... [2018-12-02 06:19:47,110 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:19:47" (1/1) ... [2018-12-02 06:19:47,112 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:19:47" (1/1) ... [2018-12-02 06:19:47,113 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:19:47" (1/1) ... [2018-12-02 06:19:47,114 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-02 06:19:47,114 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-02 06:19:47,114 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-02 06:19:47,114 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-02 06:19:47,115 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:19:47" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3c667272-8737-43c0-b2b7-62ee309e25a3/bin-2019/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-02 06:19:47,174 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-02 06:19:47,175 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-02 06:19:47,175 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-02 06:19:47,175 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-02 06:19:47,175 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-02 06:19:47,175 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-02 06:19:47,175 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-12-02 06:19:47,175 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-12-02 06:19:47,259 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-02 06:19:47,259 INFO L280 CfgBuilder]: Removed 1 assue(true) statements. [2018-12-02 06:19:47,260 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 06:19:47 BoogieIcfgContainer [2018-12-02 06:19:47,260 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-02 06:19:47,260 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-02 06:19:47,260 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-02 06:19:47,262 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-02 06:19:47,263 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 06:19:46" (1/3) ... [2018-12-02 06:19:47,263 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ac26c74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 06:19:47, skipping insertion in model container [2018-12-02 06:19:47,263 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:19:47" (2/3) ... [2018-12-02 06:19:47,264 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ac26c74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 06:19:47, skipping insertion in model container [2018-12-02 06:19:47,264 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 06:19:47" (3/3) ... [2018-12-02 06:19:47,265 INFO L112 eAbstractionObserver]: Analyzing ICFG sum01_false-unreach-call_true-termination.i [2018-12-02 06:19:47,271 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-02 06:19:47,275 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-02 06:19:47,285 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-02 06:19:47,303 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-02 06:19:47,303 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-02 06:19:47,304 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-02 06:19:47,304 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-02 06:19:47,304 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-02 06:19:47,304 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-02 06:19:47,304 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-02 06:19:47,304 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-02 06:19:47,314 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2018-12-02 06:19:47,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-12-02 06:19:47,318 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 06:19:47,318 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 06:19:47,320 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 06:19:47,323 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 06:19:47,323 INFO L82 PathProgramCache]: Analyzing trace with hash -721501374, now seen corresponding path program 1 times [2018-12-02 06:19:47,324 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 06:19:47,352 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 06:19:47,352 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 06:19:47,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 06:19:47,353 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 06:19:47,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 06:19:47,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 06:19:47,391 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 06:19:47,391 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-02 06:19:47,391 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-02 06:19:47,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-12-02 06:19:47,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-12-02 06:19:47,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-12-02 06:19:47,403 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2018-12-02 06:19:47,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 06:19:47,414 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2018-12-02 06:19:47,414 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-12-02 06:19:47,415 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2018-12-02 06:19:47,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 06:19:47,419 INFO L225 Difference]: With dead ends: 30 [2018-12-02 06:19:47,419 INFO L226 Difference]: Without dead ends: 13 [2018-12-02 06:19:47,421 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-12-02 06:19:47,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-12-02 06:19:47,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-12-02 06:19:47,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-12-02 06:19:47,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-12-02 06:19:47,441 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2018-12-02 06:19:47,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 06:19:47,441 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2018-12-02 06:19:47,441 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-12-02 06:19:47,441 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2018-12-02 06:19:47,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-12-02 06:19:47,442 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 06:19:47,442 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 06:19:47,442 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 06:19:47,442 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 06:19:47,442 INFO L82 PathProgramCache]: Analyzing trace with hash -731660105, now seen corresponding path program 1 times [2018-12-02 06:19:47,442 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 06:19:47,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 06:19:47,443 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 06:19:47,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 06:19:47,443 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 06:19:47,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 06:19:47,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 06:19:47,501 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 06:19:47,501 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-02 06:19:47,501 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-02 06:19:47,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-02 06:19:47,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-02 06:19:47,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-02 06:19:47,503 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 5 states. [2018-12-02 06:19:47,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 06:19:47,523 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2018-12-02 06:19:47,523 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-02 06:19:47,523 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2018-12-02 06:19:47,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 06:19:47,524 INFO L225 Difference]: With dead ends: 21 [2018-12-02 06:19:47,524 INFO L226 Difference]: Without dead ends: 16 [2018-12-02 06:19:47,524 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-12-02 06:19:47,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-12-02 06:19:47,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-12-02 06:19:47,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-12-02 06:19:47,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2018-12-02 06:19:47,526 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 10 [2018-12-02 06:19:47,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 06:19:47,527 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2018-12-02 06:19:47,527 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-02 06:19:47,527 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2018-12-02 06:19:47,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-12-02 06:19:47,527 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 06:19:47,527 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 06:19:47,527 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 06:19:47,527 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 06:19:47,528 INFO L82 PathProgramCache]: Analyzing trace with hash -1637338477, now seen corresponding path program 1 times [2018-12-02 06:19:47,528 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 06:19:47,528 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 06:19:47,528 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 06:19:47,528 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 06:19:47,528 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 06:19:47,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 06:19:47,664 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 06:19:47,665 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 06:19:47,665 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 06:19:47,665 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 14 with the following transitions: [2018-12-02 06:19:47,666 INFO L205 CegarAbsIntRunner]: [0], [4], [10], [12], [15], [19], [25], [28], [30], [36], [37], [38], [40] [2018-12-02 06:19:47,686 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-02 06:19:47,687 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-02 06:19:47,785 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-02 06:19:47,785 INFO L272 AbstractInterpreter]: Visited 13 different actions 36 times. Merged at 4 different actions 12 times. Widened at 1 different actions 1 times. Performed 93 root evaluator evaluations with a maximum evaluation depth of 6. Performed 93 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 5 variables. [2018-12-02 06:19:47,789 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 06:19:47,790 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-02 06:19:47,790 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 06:19:47,790 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3c667272-8737-43c0-b2b7-62ee309e25a3/bin-2019/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-02 06:19:47,796 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 06:19:47,796 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-02 06:19:47,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 06:19:47,807 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 06:19:47,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 06:19:47,903 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 06:19:48,008 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 06:19:48,023 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-02 06:19:48,023 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2018-12-02 06:19:48,023 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-02 06:19:48,023 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-12-02 06:19:48,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-12-02 06:19:48,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2018-12-02 06:19:48,024 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 14 states. [2018-12-02 06:19:48,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 06:19:48,122 INFO L93 Difference]: Finished difference Result 37 states and 45 transitions. [2018-12-02 06:19:48,123 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-12-02 06:19:48,123 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 13 [2018-12-02 06:19:48,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 06:19:48,123 INFO L225 Difference]: With dead ends: 37 [2018-12-02 06:19:48,123 INFO L226 Difference]: Without dead ends: 22 [2018-12-02 06:19:48,124 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=480, Unknown=0, NotChecked=0, Total=600 [2018-12-02 06:19:48,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-12-02 06:19:48,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2018-12-02 06:19:48,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-12-02 06:19:48,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2018-12-02 06:19:48,127 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 13 [2018-12-02 06:19:48,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 06:19:48,127 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2018-12-02 06:19:48,127 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-12-02 06:19:48,127 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2018-12-02 06:19:48,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-12-02 06:19:48,127 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 06:19:48,128 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 06:19:48,128 INFO L423 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 06:19:48,128 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 06:19:48,128 INFO L82 PathProgramCache]: Analyzing trace with hash 1350121109, now seen corresponding path program 1 times [2018-12-02 06:19:48,128 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 06:19:48,129 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 06:19:48,129 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 06:19:48,129 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 06:19:48,129 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 06:19:48,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 06:19:48,159 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 06:19:48,159 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 06:19:48,159 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 06:19:48,159 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 20 with the following transitions: [2018-12-02 06:19:48,160 INFO L205 CegarAbsIntRunner]: [0], [4], [10], [12], [15], [17], [19], [25], [28], [30], [36], [37], [38], [40] [2018-12-02 06:19:48,160 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-02 06:19:48,161 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-02 06:19:48,190 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-02 06:19:48,190 INFO L272 AbstractInterpreter]: Visited 14 different actions 41 times. Merged at 5 different actions 13 times. Widened at 1 different actions 1 times. Performed 103 root evaluator evaluations with a maximum evaluation depth of 6. Performed 103 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 3 fixpoints after 2 different actions. Largest state had 5 variables. [2018-12-02 06:19:48,192 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 06:19:48,192 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-02 06:19:48,192 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 06:19:48,192 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3c667272-8737-43c0-b2b7-62ee309e25a3/bin-2019/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-02 06:19:48,198 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 06:19:48,198 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-02 06:19:48,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 06:19:48,205 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 06:19:48,208 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 06:19:48,208 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 06:19:48,238 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 06:19:48,252 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-02 06:19:48,253 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2018-12-02 06:19:48,253 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-02 06:19:48,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-02 06:19:48,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-02 06:19:48,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-12-02 06:19:48,254 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 5 states. [2018-12-02 06:19:48,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 06:19:48,268 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2018-12-02 06:19:48,268 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-02 06:19:48,268 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2018-12-02 06:19:48,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 06:19:48,269 INFO L225 Difference]: With dead ends: 30 [2018-12-02 06:19:48,269 INFO L226 Difference]: Without dead ends: 22 [2018-12-02 06:19:48,269 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-12-02 06:19:48,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-12-02 06:19:48,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2018-12-02 06:19:48,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-12-02 06:19:48,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-12-02 06:19:48,272 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2018-12-02 06:19:48,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 06:19:48,272 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-12-02 06:19:48,272 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-02 06:19:48,272 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-12-02 06:19:48,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-12-02 06:19:48,273 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 06:19:48,273 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 06:19:48,273 INFO L423 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 06:19:48,273 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 06:19:48,273 INFO L82 PathProgramCache]: Analyzing trace with hash -424886253, now seen corresponding path program 2 times [2018-12-02 06:19:48,273 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 06:19:48,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 06:19:48,274 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 06:19:48,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 06:19:48,274 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 06:19:48,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 06:19:48,372 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-12-02 06:19:48,372 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 06:19:48,372 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 06:19:48,372 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-02 06:19:48,372 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-02 06:19:48,372 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 06:19:48,372 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3c667272-8737-43c0-b2b7-62ee309e25a3/bin-2019/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-02 06:19:48,381 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-02 06:19:48,381 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-02 06:19:48,389 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-12-02 06:19:48,389 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 06:19:48,390 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 06:19:48,495 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 06:19:48,495 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 06:19:48,685 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 06:19:48,699 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-02 06:19:48,699 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13] total 30 [2018-12-02 06:19:48,699 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-02 06:19:48,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-12-02 06:19:48,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-12-02 06:19:48,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=745, Unknown=0, NotChecked=0, Total=870 [2018-12-02 06:19:48,700 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 19 states. [2018-12-02 06:19:48,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 06:19:48,983 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2018-12-02 06:19:48,983 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-12-02 06:19:48,983 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 19 [2018-12-02 06:19:48,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 06:19:48,984 INFO L225 Difference]: With dead ends: 40 [2018-12-02 06:19:48,984 INFO L226 Difference]: Without dead ends: 28 [2018-12-02 06:19:48,984 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=288, Invalid=1604, Unknown=0, NotChecked=0, Total=1892 [2018-12-02 06:19:48,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-12-02 06:19:48,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2018-12-02 06:19:48,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-12-02 06:19:48,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2018-12-02 06:19:48,987 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 19 [2018-12-02 06:19:48,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 06:19:48,987 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2018-12-02 06:19:48,987 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-12-02 06:19:48,987 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2018-12-02 06:19:48,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-12-02 06:19:48,988 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 06:19:48,988 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 06:19:48,988 INFO L423 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 06:19:48,988 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 06:19:48,988 INFO L82 PathProgramCache]: Analyzing trace with hash -1753373675, now seen corresponding path program 2 times [2018-12-02 06:19:48,988 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 06:19:48,989 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 06:19:48,989 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 06:19:48,989 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 06:19:48,989 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 06:19:48,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 06:19:49,022 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 06:19:49,022 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 06:19:49,022 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 06:19:49,022 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-02 06:19:49,022 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-02 06:19:49,022 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 06:19:49,022 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3c667272-8737-43c0-b2b7-62ee309e25a3/bin-2019/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-02 06:19:49,028 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-02 06:19:49,028 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-02 06:19:49,035 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-12-02 06:19:49,035 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 06:19:49,036 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 06:19:49,038 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 06:19:49,038 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 06:19:49,063 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 06:19:49,077 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-02 06:19:49,077 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2018-12-02 06:19:49,077 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-02 06:19:49,077 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-02 06:19:49,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-02 06:19:49,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-12-02 06:19:49,077 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 7 states. [2018-12-02 06:19:49,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 06:19:49,094 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2018-12-02 06:19:49,094 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-02 06:19:49,094 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2018-12-02 06:19:49,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 06:19:49,094 INFO L225 Difference]: With dead ends: 39 [2018-12-02 06:19:49,094 INFO L226 Difference]: Without dead ends: 31 [2018-12-02 06:19:49,095 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-12-02 06:19:49,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-12-02 06:19:49,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2018-12-02 06:19:49,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-12-02 06:19:49,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2018-12-02 06:19:49,097 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 25 [2018-12-02 06:19:49,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 06:19:49,097 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2018-12-02 06:19:49,097 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-02 06:19:49,097 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2018-12-02 06:19:49,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-12-02 06:19:49,098 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 06:19:49,098 INFO L402 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 06:19:49,098 INFO L423 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 06:19:49,098 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 06:19:49,098 INFO L82 PathProgramCache]: Analyzing trace with hash 1094958777, now seen corresponding path program 3 times [2018-12-02 06:19:49,098 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 06:19:49,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 06:19:49,099 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 06:19:49,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 06:19:49,099 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 06:19:49,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 06:19:49,127 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 06:19:49,127 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 06:19:49,127 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 06:19:49,127 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-02 06:19:49,127 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-02 06:19:49,127 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 06:19:49,127 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3c667272-8737-43c0-b2b7-62ee309e25a3/bin-2019/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-02 06:19:49,137 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-02 06:19:49,137 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-02 06:19:49,144 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-02 06:19:49,144 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 06:19:49,145 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 06:19:49,148 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 06:19:49,148 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 06:19:49,179 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 06:19:49,193 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-02 06:19:49,193 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2018-12-02 06:19:49,193 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-02 06:19:49,193 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-02 06:19:49,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-02 06:19:49,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-12-02 06:19:49,193 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 8 states. [2018-12-02 06:19:49,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 06:19:49,216 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2018-12-02 06:19:49,217 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-02 06:19:49,217 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2018-12-02 06:19:49,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 06:19:49,217 INFO L225 Difference]: With dead ends: 42 [2018-12-02 06:19:49,217 INFO L226 Difference]: Without dead ends: 34 [2018-12-02 06:19:49,217 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-12-02 06:19:49,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-12-02 06:19:49,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2018-12-02 06:19:49,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-12-02 06:19:49,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2018-12-02 06:19:49,220 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 28 [2018-12-02 06:19:49,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 06:19:49,220 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2018-12-02 06:19:49,220 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-02 06:19:49,220 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2018-12-02 06:19:49,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-12-02 06:19:49,221 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 06:19:49,221 INFO L402 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 06:19:49,221 INFO L423 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 06:19:49,221 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 06:19:49,221 INFO L82 PathProgramCache]: Analyzing trace with hash 98169237, now seen corresponding path program 4 times [2018-12-02 06:19:49,221 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 06:19:49,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 06:19:49,222 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 06:19:49,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 06:19:49,222 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 06:19:49,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 06:19:49,257 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 13 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 06:19:49,257 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 06:19:49,257 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 06:19:49,257 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-02 06:19:49,257 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-02 06:19:49,257 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 06:19:49,257 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3c667272-8737-43c0-b2b7-62ee309e25a3/bin-2019/utaipan/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-02 06:19:49,265 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 06:19:49,265 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-02 06:19:49,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 06:19:49,272 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 06:19:49,277 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 13 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 06:19:49,277 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 06:19:49,318 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 13 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 06:19:49,332 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-02 06:19:49,332 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 11 [2018-12-02 06:19:49,332 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-02 06:19:49,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-02 06:19:49,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-02 06:19:49,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-12-02 06:19:49,333 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 9 states. [2018-12-02 06:19:49,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 06:19:49,355 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2018-12-02 06:19:49,355 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-02 06:19:49,355 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2018-12-02 06:19:49,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 06:19:49,356 INFO L225 Difference]: With dead ends: 45 [2018-12-02 06:19:49,356 INFO L226 Difference]: Without dead ends: 37 [2018-12-02 06:19:49,356 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 56 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-12-02 06:19:49,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-12-02 06:19:49,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2018-12-02 06:19:49,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-12-02 06:19:49,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2018-12-02 06:19:49,360 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 31 [2018-12-02 06:19:49,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 06:19:49,360 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2018-12-02 06:19:49,360 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-02 06:19:49,360 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2018-12-02 06:19:49,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-12-02 06:19:49,361 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 06:19:49,361 INFO L402 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 06:19:49,361 INFO L423 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 06:19:49,361 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 06:19:49,361 INFO L82 PathProgramCache]: Analyzing trace with hash 144867641, now seen corresponding path program 5 times [2018-12-02 06:19:49,361 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 06:19:49,362 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 06:19:49,362 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 06:19:49,362 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 06:19:49,362 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 06:19:49,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 06:19:49,418 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 15 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 06:19:49,419 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 06:19:49,419 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 06:19:49,419 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-02 06:19:49,419 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-02 06:19:49,419 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 06:19:49,419 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3c667272-8737-43c0-b2b7-62ee309e25a3/bin-2019/utaipan/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-02 06:19:49,425 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-02 06:19:49,425 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-02 06:19:49,437 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-12-02 06:19:49,437 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 06:19:49,438 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 06:19:49,442 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 15 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 06:19:49,442 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 06:19:49,480 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 15 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 06:19:49,495 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-02 06:19:49,495 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 11 [2018-12-02 06:19:49,495 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-02 06:19:49,495 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-02 06:19:49,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-02 06:19:49,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-12-02 06:19:49,496 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 10 states. [2018-12-02 06:19:49,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 06:19:49,519 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2018-12-02 06:19:49,519 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-02 06:19:49,519 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2018-12-02 06:19:49,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 06:19:49,520 INFO L225 Difference]: With dead ends: 48 [2018-12-02 06:19:49,520 INFO L226 Difference]: Without dead ends: 40 [2018-12-02 06:19:49,520 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 61 SyntacticMatches, 7 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-12-02 06:19:49,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-12-02 06:19:49,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2018-12-02 06:19:49,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-12-02 06:19:49,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2018-12-02 06:19:49,522 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 34 [2018-12-02 06:19:49,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 06:19:49,523 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2018-12-02 06:19:49,523 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-02 06:19:49,523 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2018-12-02 06:19:49,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-12-02 06:19:49,523 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 06:19:49,523 INFO L402 BasicCegarLoop]: trace histogram [9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 06:19:49,523 INFO L423 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 06:19:49,523 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 06:19:49,523 INFO L82 PathProgramCache]: Analyzing trace with hash -232382699, now seen corresponding path program 6 times [2018-12-02 06:19:49,523 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 06:19:49,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 06:19:49,524 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 06:19:49,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 06:19:49,524 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 06:19:49,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 06:19:49,587 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 17 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 06:19:49,587 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 06:19:49,587 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 06:19:49,587 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-02 06:19:49,588 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-02 06:19:49,588 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 06:19:49,588 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3c667272-8737-43c0-b2b7-62ee309e25a3/bin-2019/utaipan/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-02 06:19:49,594 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-02 06:19:49,594 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-02 06:19:49,601 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-02 06:19:49,601 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 06:19:49,602 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 06:19:49,605 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 17 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 06:19:49,606 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 06:19:49,642 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 17 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 06:19:49,657 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-02 06:19:49,657 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 11 [2018-12-02 06:19:49,657 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-02 06:19:49,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-02 06:19:49,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-02 06:19:49,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-12-02 06:19:49,658 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 11 states. [2018-12-02 06:19:49,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 06:19:49,680 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2018-12-02 06:19:49,681 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-02 06:19:49,681 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2018-12-02 06:19:49,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 06:19:49,681 INFO L225 Difference]: With dead ends: 51 [2018-12-02 06:19:49,681 INFO L226 Difference]: Without dead ends: 43 [2018-12-02 06:19:49,681 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 66 SyntacticMatches, 9 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-12-02 06:19:49,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-12-02 06:19:49,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2018-12-02 06:19:49,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-12-02 06:19:49,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2018-12-02 06:19:49,684 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 37 [2018-12-02 06:19:49,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 06:19:49,684 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2018-12-02 06:19:49,684 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-02 06:19:49,684 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2018-12-02 06:19:49,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-12-02 06:19:49,685 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 06:19:49,685 INFO L402 BasicCegarLoop]: trace histogram [10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 06:19:49,685 INFO L423 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 06:19:49,685 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 06:19:49,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1032151993, now seen corresponding path program 7 times [2018-12-02 06:19:49,685 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 06:19:49,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 06:19:49,685 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 06:19:49,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 06:19:49,686 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 06:19:49,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-02 06:19:49,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-02 06:19:49,707 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2018-12-02 06:19:49,723 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.12 06:19:49 BoogieIcfgContainer [2018-12-02 06:19:49,723 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-02 06:19:49,723 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-02 06:19:49,723 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-02 06:19:49,724 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-02 06:19:49,724 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 06:19:47" (3/4) ... [2018-12-02 06:19:49,725 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-12-02 06:19:49,754 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_3c667272-8737-43c0-b2b7-62ee309e25a3/bin-2019/utaipan/witness.graphml [2018-12-02 06:19:49,754 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-02 06:19:49,755 INFO L168 Benchmark]: Toolchain (without parser) took 2782.91 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 224.9 MB). Free memory was 953.3 MB in the beginning and 988.3 MB in the end (delta: -35.0 MB). Peak memory consumption was 189.9 MB. Max. memory is 11.5 GB. [2018-12-02 06:19:49,756 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 1.0 GB. Free memory is still 979.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-02 06:19:49,756 INFO L168 Benchmark]: CACSL2BoogieTranslator took 116.49 ms. Allocated memory is still 1.0 GB. Free memory was 953.3 MB in the beginning and 942.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-12-02 06:19:49,756 INFO L168 Benchmark]: Boogie Procedure Inliner took 11.55 ms. Allocated memory is still 1.0 GB. Free memory is still 942.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-02 06:19:49,756 INFO L168 Benchmark]: Boogie Preprocessor took 12.19 ms. Allocated memory is still 1.0 GB. Free memory is still 942.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-02 06:19:49,756 INFO L168 Benchmark]: RCFGBuilder took 146.04 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 158.9 MB). Free memory was 942.6 MB in the beginning and 1.1 GB in the end (delta: -201.0 MB). Peak memory consumption was 15.8 MB. Max. memory is 11.5 GB. [2018-12-02 06:19:49,757 INFO L168 Benchmark]: TraceAbstraction took 2462.82 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 66.1 MB). Free memory was 1.1 GB in the beginning and 993.3 MB in the end (delta: 150.3 MB). Peak memory consumption was 216.3 MB. Max. memory is 11.5 GB. [2018-12-02 06:19:49,757 INFO L168 Benchmark]: Witness Printer took 30.99 ms. Allocated memory is still 1.3 GB. Free memory was 993.3 MB in the beginning and 988.3 MB in the end (delta: 5.0 MB). Peak memory consumption was 5.0 MB. Max. memory is 11.5 GB. [2018-12-02 06:19:49,758 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 1.0 GB. Free memory is still 979.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 116.49 ms. Allocated memory is still 1.0 GB. Free memory was 953.3 MB in the beginning and 942.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 11.55 ms. Allocated memory is still 1.0 GB. Free memory is still 942.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 12.19 ms. Allocated memory is still 1.0 GB. Free memory is still 942.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 146.04 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 158.9 MB). Free memory was 942.6 MB in the beginning and 1.1 GB in the end (delta: -201.0 MB). Peak memory consumption was 15.8 MB. Max. memory is 11.5 GB. * TraceAbstraction took 2462.82 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 66.1 MB). Free memory was 1.1 GB in the beginning and 993.3 MB in the end (delta: 150.3 MB). Peak memory consumption was 216.3 MB. Max. memory is 11.5 GB. * Witness Printer took 30.99 ms. Allocated memory is still 1.3 GB. Free memory was 993.3 MB in the beginning and 988.3 MB in the end (delta: 5.0 MB). Peak memory consumption was 5.0 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int i, n=__VERIFIER_nondet_uint(), sn=0; [L12] int i, n=__VERIFIER_nondet_uint(), sn=0; [L13] i=1 VAL [i=1, n=0, n=10] [L13] COND TRUE i<=n VAL [i=1, n=10, n=0] [L14] COND TRUE i<10 [L15] sn = sn + (2) VAL [i=1, n=2, n=10] [L13] i++ VAL [i=2, n=10, n=2] [L13] COND TRUE i<=n VAL [i=2, n=2, n=10] [L14] COND TRUE i<10 [L15] sn = sn + (2) VAL [i=2, n=10, n=4] [L13] i++ VAL [i=3, n=4, n=10] [L13] COND TRUE i<=n VAL [i=3, n=10, n=4] [L14] COND TRUE i<10 [L15] sn = sn + (2) VAL [i=3, n=10, n=6] [L13] i++ VAL [i=4, n=6, n=10] [L13] COND TRUE i<=n VAL [i=4, n=6, n=10] [L14] COND TRUE i<10 [L15] sn = sn + (2) VAL [i=4, n=8, n=10] [L13] i++ VAL [i=5, n=8, n=10] [L13] COND TRUE i<=n VAL [i=5, n=8, n=10] [L14] COND TRUE i<10 [L15] sn = sn + (2) VAL [i=5, n=10, n=10] [L13] i++ VAL [i=6, n=10, n=10] [L13] COND TRUE i<=n VAL [i=6, n=10, n=10] [L14] COND TRUE i<10 [L15] sn = sn + (2) VAL [i=6, n=12, n=10] [L13] i++ VAL [i=7, n=10, n=12] [L13] COND TRUE i<=n VAL [i=7, n=12, n=10] [L14] COND TRUE i<10 [L15] sn = sn + (2) VAL [i=7, n=10, n=14] [L13] i++ VAL [i=8, n=14, n=10] [L13] COND TRUE i<=n VAL [i=8, n=10, n=14] [L14] COND TRUE i<10 [L15] sn = sn + (2) VAL [i=8, n=16, n=10] [L13] i++ VAL [i=9, n=10, n=16] [L13] COND TRUE i<=n VAL [i=9, n=16, n=10] [L14] COND TRUE i<10 [L15] sn = sn + (2) VAL [i=9, n=10, n=18] [L13] i++ VAL [i=10, n=10, n=18] [L13] COND TRUE i<=n VAL [i=10, n=10, n=18] [L14] COND FALSE !(i<10) VAL [i=10, n=18, n=10] [L13] i++ VAL [i=11, n=18, n=10] [L13] COND FALSE !(i<=n) VAL [i=11, n=10, n=18] [L17] CALL __VERIFIER_assert(sn==n*(2) || sn == 0) VAL [\old(cond)=0] [L4] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L5] __VERIFIER_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 19 locations, 1 error locations. UNSAFE Result, 2.4s OverallTime, 11 OverallIterations, 10 TraceHistogramMax, 0.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 114 SDtfs, 62 SDslu, 476 SDs, 0 SdLazy, 506 SolverSat, 24 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 502 GetRequests, 355 SyntacticMatches, 27 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 684 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.1s AbstIntTime, 2 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 10 MinimizatonAttempts, 9 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 472 NumberOfCodeBlocks, 472 NumberOfCodeBlocksAsserted, 37 NumberOfCheckSat, 612 ConstructedInterpolants, 8 QuantifiedInterpolants, 46362 SizeOfPredicates, 14 NumberOfNonLiveVariables, 448 ConjunctsInSsa, 82 ConjunctsInUnsatCore, 26 InterpolantComputations, 2 PerfectInterpolantSequences, 215/1170 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...