./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_21910ac6-c413-43dc-bd19-28cd4e8c4fb0/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_21910ac6-c413-43dc-bd19-28cd4e8c4fb0/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_21910ac6-c413-43dc-bd19-28cd4e8c4fb0/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_21910ac6-c413-43dc-bd19-28cd4e8c4fb0/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_21910ac6-c413-43dc-bd19-28cd4e8c4fb0/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_21910ac6-c413-43dc-bd19-28cd4e8c4fb0/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 [2018-12-09 19:08:41,574 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-09 19:08:41,575 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-09 19:08:41,581 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-09 19:08:41,581 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-09 19:08:41,582 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-09 19:08:41,583 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-09 19:08:41,583 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-09 19:08:41,584 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-09 19:08:41,585 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-09 19:08:41,585 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-09 19:08:41,585 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-09 19:08:41,586 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-09 19:08:41,586 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-09 19:08:41,587 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-09 19:08:41,587 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-09 19:08:41,588 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-09 19:08:41,588 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-09 19:08:41,589 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-09 19:08:41,590 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-09 19:08:41,590 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-09 19:08:41,591 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-09 19:08:41,592 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-09 19:08:41,592 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-09 19:08:41,592 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-09 19:08:41,593 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-09 19:08:41,593 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-09 19:08:41,594 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-09 19:08:41,594 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-09 19:08:41,595 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-09 19:08:41,595 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-09 19:08:41,595 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-09 19:08:41,595 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-09 19:08:41,595 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-09 19:08:41,596 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-09 19:08:41,596 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-09 19:08:41,596 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_21910ac6-c413-43dc-bd19-28cd4e8c4fb0/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-12-09 19:08:41,603 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-09 19:08:41,604 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-09 19:08:41,604 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-09 19:08:41,604 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-09 19:08:41,604 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-09 19:08:41,605 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-09 19:08:41,605 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-09 19:08:41,605 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-09 19:08:41,605 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-09 19:08:41,605 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-09 19:08:41,605 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-09 19:08:41,605 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-12-09 19:08:41,605 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-09 19:08:41,606 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-09 19:08:41,606 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-09 19:08:41,606 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-09 19:08:41,606 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-09 19:08:41,606 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-09 19:08:41,606 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-09 19:08:41,607 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-09 19:08:41,607 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-09 19:08:41,607 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-09 19:08:41,607 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-09 19:08:41,607 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-09 19:08:41,607 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-09 19:08:41,607 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-09 19:08:41,607 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-09 19:08:41,608 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-09 19:08:41,608 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-09 19:08:41,608 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-09 19:08:41,608 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-09 19:08:41,608 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-09 19:08:41,608 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-09 19:08:41,608 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-09 19:08:41,608 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-09 19:08:41,608 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-12-09 19:08:41,609 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_21910ac6-c413-43dc-bd19-28cd4e8c4fb0/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 [2018-12-09 19:08:41,627 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-09 19:08:41,636 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-09 19:08:41,638 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-09 19:08:41,639 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-09 19:08:41,640 INFO L276 PluginConnector]: CDTParser initialized [2018-12-09 19:08:41,640 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_21910ac6-c413-43dc-bd19-28cd4e8c4fb0/bin-2019/utaipan/../../sv-benchmarks/c/loops/sum01_false-unreach-call_true-termination.i [2018-12-09 19:08:41,682 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_21910ac6-c413-43dc-bd19-28cd4e8c4fb0/bin-2019/utaipan/data/b2a730e7b/924c0f24921d4691b848a162a8de2c91/FLAG625f3582f [2018-12-09 19:08:42,125 INFO L307 CDTParser]: Found 1 translation units. [2018-12-09 19:08:42,125 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_21910ac6-c413-43dc-bd19-28cd4e8c4fb0/sv-benchmarks/c/loops/sum01_false-unreach-call_true-termination.i [2018-12-09 19:08:42,129 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_21910ac6-c413-43dc-bd19-28cd4e8c4fb0/bin-2019/utaipan/data/b2a730e7b/924c0f24921d4691b848a162a8de2c91/FLAG625f3582f [2018-12-09 19:08:42,138 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_21910ac6-c413-43dc-bd19-28cd4e8c4fb0/bin-2019/utaipan/data/b2a730e7b/924c0f24921d4691b848a162a8de2c91 [2018-12-09 19:08:42,140 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-09 19:08:42,141 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-09 19:08:42,142 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-09 19:08:42,142 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-09 19:08:42,144 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-09 19:08:42,145 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 07:08:42" (1/1) ... [2018-12-09 19:08:42,146 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42aa496 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:08:42, skipping insertion in model container [2018-12-09 19:08:42,146 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 07:08:42" (1/1) ... [2018-12-09 19:08:42,151 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-09 19:08:42,160 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-09 19:08:42,254 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-09 19:08:42,256 INFO L191 MainTranslator]: Completed pre-run [2018-12-09 19:08:42,264 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-09 19:08:42,272 INFO L195 MainTranslator]: Completed translation [2018-12-09 19:08:42,272 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:08:42 WrapperNode [2018-12-09 19:08:42,272 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-09 19:08:42,273 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-09 19:08:42,273 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-09 19:08:42,273 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-09 19:08:42,278 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:08:42" (1/1) ... [2018-12-09 19:08:42,280 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:08:42" (1/1) ... [2018-12-09 19:08:42,283 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-09 19:08:42,284 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-09 19:08:42,284 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-09 19:08:42,284 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-09 19:08:42,289 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:08:42" (1/1) ... [2018-12-09 19:08:42,289 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:08:42" (1/1) ... [2018-12-09 19:08:42,289 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:08:42" (1/1) ... [2018-12-09 19:08:42,289 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:08:42" (1/1) ... [2018-12-09 19:08:42,291 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:08:42" (1/1) ... [2018-12-09 19:08:42,294 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:08:42" (1/1) ... [2018-12-09 19:08:42,294 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:08:42" (1/1) ... [2018-12-09 19:08:42,295 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-09 19:08:42,295 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-09 19:08:42,295 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-09 19:08:42,295 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-09 19:08:42,296 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:08:42" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_21910ac6-c413-43dc-bd19-28cd4e8c4fb0/bin-2019/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-09 19:08:42,355 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-09 19:08:42,355 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-09 19:08:42,355 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-09 19:08:42,355 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-09 19:08:42,355 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-09 19:08:42,355 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-09 19:08:42,355 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-12-09 19:08:42,356 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-12-09 19:08:42,432 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-09 19:08:42,432 INFO L280 CfgBuilder]: Removed 1 assue(true) statements. [2018-12-09 19:08:42,432 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:08:42 BoogieIcfgContainer [2018-12-09 19:08:42,432 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-09 19:08:42,433 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-09 19:08:42,433 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-09 19:08:42,434 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-09 19:08:42,434 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 07:08:42" (1/3) ... [2018-12-09 19:08:42,435 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a823d8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 07:08:42, skipping insertion in model container [2018-12-09 19:08:42,435 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:08:42" (2/3) ... [2018-12-09 19:08:42,435 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a823d8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 07:08:42, skipping insertion in model container [2018-12-09 19:08:42,435 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:08:42" (3/3) ... [2018-12-09 19:08:42,436 INFO L112 eAbstractionObserver]: Analyzing ICFG sum01_false-unreach-call_true-termination.i [2018-12-09 19:08:42,441 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-09 19:08:42,445 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-09 19:08:42,454 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-09 19:08:42,471 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-09 19:08:42,471 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-09 19:08:42,471 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-09 19:08:42,471 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-09 19:08:42,472 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-09 19:08:42,472 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-09 19:08:42,472 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-09 19:08:42,472 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-09 19:08:42,483 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2018-12-09 19:08:42,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-12-09 19:08:42,486 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 19:08:42,486 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 19:08:42,488 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 19:08:42,491 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 19:08:42,491 INFO L82 PathProgramCache]: Analyzing trace with hash -721501374, now seen corresponding path program 1 times [2018-12-09 19:08:42,492 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 19:08:42,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:08:42,519 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:08:42,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:08:42,519 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 19:08:42,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:08:42,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 19:08:42,556 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 19:08:42,556 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-09 19:08:42,556 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 19:08:42,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-12-09 19:08:42,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-12-09 19:08:42,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-12-09 19:08:42,567 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2018-12-09 19:08:42,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 19:08:42,578 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2018-12-09 19:08:42,578 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-12-09 19:08:42,579 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2018-12-09 19:08:42,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 19:08:42,583 INFO L225 Difference]: With dead ends: 30 [2018-12-09 19:08:42,583 INFO L226 Difference]: Without dead ends: 13 [2018-12-09 19:08:42,585 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 [2018-12-09 19:08:42,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-12-09 19:08:42,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-12-09 19:08:42,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-12-09 19:08:42,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-12-09 19:08:42,605 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2018-12-09 19:08:42,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 19:08:42,605 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2018-12-09 19:08:42,605 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-12-09 19:08:42,605 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2018-12-09 19:08:42,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-12-09 19:08:42,606 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 19:08:42,606 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 19:08:42,606 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 19:08:42,606 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 19:08:42,606 INFO L82 PathProgramCache]: Analyzing trace with hash -731660105, now seen corresponding path program 1 times [2018-12-09 19:08:42,606 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 19:08:42,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:08:42,607 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:08:42,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:08:42,607 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 19:08:42,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:08:42,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 19:08:42,646 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 19:08:42,646 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-09 19:08:42,646 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 19:08:42,647 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-09 19:08:42,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-09 19:08:42,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-09 19:08:42,647 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 5 states. [2018-12-09 19:08:42,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 19:08:42,673 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2018-12-09 19:08:42,673 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-09 19:08:42,673 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2018-12-09 19:08:42,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 19:08:42,674 INFO L225 Difference]: With dead ends: 21 [2018-12-09 19:08:42,674 INFO L226 Difference]: Without dead ends: 16 [2018-12-09 19:08:42,675 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-12-09 19:08:42,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-12-09 19:08:42,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-12-09 19:08:42,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-12-09 19:08:42,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2018-12-09 19:08:42,677 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 10 [2018-12-09 19:08:42,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 19:08:42,677 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2018-12-09 19:08:42,677 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-09 19:08:42,677 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2018-12-09 19:08:42,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-12-09 19:08:42,677 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 19:08:42,678 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 19:08:42,678 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 19:08:42,678 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 19:08:42,678 INFO L82 PathProgramCache]: Analyzing trace with hash -1637338477, now seen corresponding path program 1 times [2018-12-09 19:08:42,678 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 19:08:42,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:08:42,679 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:08:42,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:08:42,679 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 19:08:42,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:08:42,812 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 19:08:42,812 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 19:08:42,812 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 19:08:42,813 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 14 with the following transitions: [2018-12-09 19:08:42,814 INFO L205 CegarAbsIntRunner]: [0], [4], [10], [12], [15], [19], [25], [28], [30], [36], [37], [38], [40] [2018-12-09 19:08:42,833 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-09 19:08:42,834 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-09 19:08:42,933 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-09 19:08:42,934 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. [2018-12-09 19:08:42,938 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 19:08:42,939 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-09 19:08:42,939 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 19:08:42,939 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_21910ac6-c413-43dc-bd19-28cd4e8c4fb0/bin-2019/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 19:08:42,945 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:08:42,945 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 19:08:42,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:08:42,956 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 19:08:43,054 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 19:08:43,054 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 19:08:43,158 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 19:08:43,173 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 19:08:43,173 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2018-12-09 19:08:43,173 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 19:08:43,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-12-09 19:08:43,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-12-09 19:08:43,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2018-12-09 19:08:43,174 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 14 states. [2018-12-09 19:08:43,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 19:08:43,287 INFO L93 Difference]: Finished difference Result 37 states and 45 transitions. [2018-12-09 19:08:43,287 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-12-09 19:08:43,287 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 13 [2018-12-09 19:08:43,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 19:08:43,288 INFO L225 Difference]: With dead ends: 37 [2018-12-09 19:08:43,288 INFO L226 Difference]: Without dead ends: 22 [2018-12-09 19:08:43,288 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 [2018-12-09 19:08:43,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-12-09 19:08:43,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2018-12-09 19:08:43,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-12-09 19:08:43,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2018-12-09 19:08:43,291 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 13 [2018-12-09 19:08:43,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 19:08:43,291 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2018-12-09 19:08:43,291 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-12-09 19:08:43,291 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2018-12-09 19:08:43,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-12-09 19:08:43,292 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 19:08:43,292 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 19:08:43,292 INFO L423 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 19:08:43,292 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 19:08:43,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1350121109, now seen corresponding path program 1 times [2018-12-09 19:08:43,292 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 19:08:43,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:08:43,293 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:08:43,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:08:43,293 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 19:08:43,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:08:43,326 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 19:08:43,327 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 19:08:43,327 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 19:08:43,327 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 20 with the following transitions: [2018-12-09 19:08:43,327 INFO L205 CegarAbsIntRunner]: [0], [4], [10], [12], [15], [17], [19], [25], [28], [30], [36], [37], [38], [40] [2018-12-09 19:08:43,328 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-09 19:08:43,328 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-09 19:08:43,358 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-09 19:08:43,358 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. [2018-12-09 19:08:43,360 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 19:08:43,360 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-09 19:08:43,360 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 19:08:43,360 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_21910ac6-c413-43dc-bd19-28cd4e8c4fb0/bin-2019/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 19:08:43,366 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:08:43,366 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 19:08:43,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:08:43,372 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 19:08:43,375 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 19:08:43,375 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 19:08:43,395 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 19:08:43,408 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 19:08:43,409 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2018-12-09 19:08:43,409 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 19:08:43,409 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-09 19:08:43,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-09 19:08:43,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-12-09 19:08:43,409 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 5 states. [2018-12-09 19:08:43,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 19:08:43,423 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2018-12-09 19:08:43,423 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-09 19:08:43,424 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2018-12-09 19:08:43,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 19:08:43,424 INFO L225 Difference]: With dead ends: 30 [2018-12-09 19:08:43,424 INFO L226 Difference]: Without dead ends: 22 [2018-12-09 19:08:43,425 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 [2018-12-09 19:08:43,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-12-09 19:08:43,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2018-12-09 19:08:43,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-12-09 19:08:43,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-12-09 19:08:43,427 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2018-12-09 19:08:43,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 19:08:43,428 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-12-09 19:08:43,428 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-09 19:08:43,428 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-12-09 19:08:43,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-12-09 19:08:43,428 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 19:08:43,428 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 19:08:43,429 INFO L423 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 19:08:43,429 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 19:08:43,429 INFO L82 PathProgramCache]: Analyzing trace with hash -424886253, now seen corresponding path program 2 times [2018-12-09 19:08:43,429 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 19:08:43,430 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:08:43,430 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:08:43,430 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:08:43,430 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 19:08:43,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:08:43,538 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-12-09 19:08:43,539 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 19:08:43,539 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 19:08:43,539 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 19:08:43,539 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 19:08:43,539 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 19:08:43,539 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_21910ac6-c413-43dc-bd19-28cd4e8c4fb0/bin-2019/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 19:08:43,546 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-09 19:08:43,546 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-09 19:08:43,554 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-12-09 19:08:43,554 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 19:08:43,556 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 19:08:43,667 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 19:08:43,667 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 19:08:43,874 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 19:08:43,888 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 19:08:43,888 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13] total 30 [2018-12-09 19:08:43,889 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 19:08:43,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-12-09 19:08:43,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-12-09 19:08:43,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=745, Unknown=0, NotChecked=0, Total=870 [2018-12-09 19:08:43,889 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 19 states. [2018-12-09 19:08:44,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 19:08:44,147 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2018-12-09 19:08:44,147 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-12-09 19:08:44,147 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 19 [2018-12-09 19:08:44,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 19:08:44,148 INFO L225 Difference]: With dead ends: 40 [2018-12-09 19:08:44,148 INFO L226 Difference]: Without dead ends: 28 [2018-12-09 19:08:44,148 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 [2018-12-09 19:08:44,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-12-09 19:08:44,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2018-12-09 19:08:44,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-12-09 19:08:44,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2018-12-09 19:08:44,151 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 19 [2018-12-09 19:08:44,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 19:08:44,151 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2018-12-09 19:08:44,151 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-12-09 19:08:44,151 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2018-12-09 19:08:44,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-12-09 19:08:44,151 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 19:08:44,151 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 19:08:44,151 INFO L423 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 19:08:44,152 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 19:08:44,152 INFO L82 PathProgramCache]: Analyzing trace with hash -1753373675, now seen corresponding path program 2 times [2018-12-09 19:08:44,152 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 19:08:44,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:08:44,152 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 19:08:44,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:08:44,152 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 19:08:44,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:08:44,178 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 19:08:44,178 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 19:08:44,178 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 19:08:44,178 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 19:08:44,178 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 19:08:44,178 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 19:08:44,178 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_21910ac6-c413-43dc-bd19-28cd4e8c4fb0/bin-2019/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 19:08:44,184 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-09 19:08:44,184 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-09 19:08:44,192 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-12-09 19:08:44,192 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 19:08:44,193 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 19:08:44,195 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 19:08:44,195 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 19:08:44,228 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 19:08:44,242 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 19:08:44,242 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2018-12-09 19:08:44,242 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 19:08:44,242 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-09 19:08:44,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-09 19:08:44,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-12-09 19:08:44,243 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 7 states. [2018-12-09 19:08:44,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 19:08:44,260 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2018-12-09 19:08:44,261 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-09 19:08:44,261 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2018-12-09 19:08:44,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 19:08:44,261 INFO L225 Difference]: With dead ends: 39 [2018-12-09 19:08:44,261 INFO L226 Difference]: Without dead ends: 31 [2018-12-09 19:08:44,261 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 [2018-12-09 19:08:44,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-12-09 19:08:44,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2018-12-09 19:08:44,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-12-09 19:08:44,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2018-12-09 19:08:44,264 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 25 [2018-12-09 19:08:44,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 19:08:44,264 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2018-12-09 19:08:44,264 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-09 19:08:44,264 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2018-12-09 19:08:44,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-12-09 19:08:44,264 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 19:08:44,264 INFO L402 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 19:08:44,265 INFO L423 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 19:08:44,265 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 19:08:44,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1094958777, now seen corresponding path program 3 times [2018-12-09 19:08:44,265 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 19:08:44,265 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:08:44,265 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 19:08:44,265 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:08:44,265 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 19:08:44,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:08:44,298 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 19:08:44,298 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 19:08:44,298 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 19:08:44,298 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 19:08:44,298 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 19:08:44,298 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 19:08:44,298 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_21910ac6-c413-43dc-bd19-28cd4e8c4fb0/bin-2019/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 19:08:44,304 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-09 19:08:44,304 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-09 19:08:44,310 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-09 19:08:44,311 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 19:08:44,312 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 19:08:44,316 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 19:08:44,316 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 19:08:44,360 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 19:08:44,384 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 19:08:44,385 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2018-12-09 19:08:44,385 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 19:08:44,385 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-09 19:08:44,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-09 19:08:44,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-12-09 19:08:44,386 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 8 states. [2018-12-09 19:08:44,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 19:08:44,406 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2018-12-09 19:08:44,406 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-09 19:08:44,406 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2018-12-09 19:08:44,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 19:08:44,406 INFO L225 Difference]: With dead ends: 42 [2018-12-09 19:08:44,407 INFO L226 Difference]: Without dead ends: 34 [2018-12-09 19:08:44,407 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 [2018-12-09 19:08:44,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-12-09 19:08:44,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2018-12-09 19:08:44,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-12-09 19:08:44,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2018-12-09 19:08:44,410 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 28 [2018-12-09 19:08:44,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 19:08:44,410 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2018-12-09 19:08:44,410 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-09 19:08:44,410 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2018-12-09 19:08:44,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-12-09 19:08:44,411 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 19:08:44,411 INFO L402 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 19:08:44,411 INFO L423 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 19:08:44,411 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 19:08:44,412 INFO L82 PathProgramCache]: Analyzing trace with hash 98169237, now seen corresponding path program 4 times [2018-12-09 19:08:44,412 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 19:08:44,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:08:44,412 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 19:08:44,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:08:44,413 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 19:08:44,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:08:44,459 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 13 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 19:08:44,460 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 19:08:44,460 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 19:08:44,460 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 19:08:44,460 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 19:08:44,460 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 19:08:44,460 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_21910ac6-c413-43dc-bd19-28cd4e8c4fb0/bin-2019/utaipan/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 19:08:44,467 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:08:44,467 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 19:08:44,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:08:44,475 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 19:08:44,481 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 13 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 19:08:44,481 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 19:08:44,518 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 13 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 19:08:44,532 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 19:08:44,533 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 11 [2018-12-09 19:08:44,533 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 19:08:44,533 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-09 19:08:44,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-09 19:08:44,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-12-09 19:08:44,533 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 9 states. [2018-12-09 19:08:44,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 19:08:44,562 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2018-12-09 19:08:44,563 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-09 19:08:44,563 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2018-12-09 19:08:44,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 19:08:44,563 INFO L225 Difference]: With dead ends: 45 [2018-12-09 19:08:44,563 INFO L226 Difference]: Without dead ends: 37 [2018-12-09 19:08:44,563 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 [2018-12-09 19:08:44,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-12-09 19:08:44,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2018-12-09 19:08:44,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-12-09 19:08:44,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2018-12-09 19:08:44,566 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 31 [2018-12-09 19:08:44,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 19:08:44,566 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2018-12-09 19:08:44,566 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-09 19:08:44,566 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2018-12-09 19:08:44,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-12-09 19:08:44,566 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 19:08:44,566 INFO L402 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 19:08:44,567 INFO L423 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 19:08:44,567 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 19:08:44,567 INFO L82 PathProgramCache]: Analyzing trace with hash 144867641, now seen corresponding path program 5 times [2018-12-09 19:08:44,567 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 19:08:44,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:08:44,567 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:08:44,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:08:44,567 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 19:08:44,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:08:44,624 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 15 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 19:08:44,624 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 19:08:44,624 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 19:08:44,624 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 19:08:44,624 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 19:08:44,624 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 19:08:44,624 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_21910ac6-c413-43dc-bd19-28cd4e8c4fb0/bin-2019/utaipan/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 19:08:44,631 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-09 19:08:44,631 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-09 19:08:44,640 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-12-09 19:08:44,640 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 19:08:44,641 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 19:08:44,645 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 15 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 19:08:44,645 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 19:08:44,701 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 15 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 19:08:44,716 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 19:08:44,716 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 11 [2018-12-09 19:08:44,716 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 19:08:44,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-09 19:08:44,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-09 19:08:44,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-12-09 19:08:44,716 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 10 states. [2018-12-09 19:08:44,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 19:08:44,739 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2018-12-09 19:08:44,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-09 19:08:44,739 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2018-12-09 19:08:44,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 19:08:44,740 INFO L225 Difference]: With dead ends: 48 [2018-12-09 19:08:44,740 INFO L226 Difference]: Without dead ends: 40 [2018-12-09 19:08:44,740 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 [2018-12-09 19:08:44,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-12-09 19:08:44,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2018-12-09 19:08:44,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-12-09 19:08:44,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2018-12-09 19:08:44,744 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 34 [2018-12-09 19:08:44,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 19:08:44,744 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2018-12-09 19:08:44,744 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-09 19:08:44,744 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2018-12-09 19:08:44,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-12-09 19:08:44,745 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 19:08:44,745 INFO L402 BasicCegarLoop]: trace histogram [9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 19:08:44,745 INFO L423 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 19:08:44,745 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 19:08:44,745 INFO L82 PathProgramCache]: Analyzing trace with hash -232382699, now seen corresponding path program 6 times [2018-12-09 19:08:44,745 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 19:08:44,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:08:44,746 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 19:08:44,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:08:44,746 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 19:08:44,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:08:44,799 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 17 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 19:08:44,799 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 19:08:44,800 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 19:08:44,800 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 19:08:44,800 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 19:08:44,800 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 19:08:44,800 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_21910ac6-c413-43dc-bd19-28cd4e8c4fb0/bin-2019/utaipan/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 19:08:44,805 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-09 19:08:44,806 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-09 19:08:44,813 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-09 19:08:44,813 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 19:08:44,814 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 19:08:44,818 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 17 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 19:08:44,818 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 19:08:44,861 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 17 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 19:08:44,876 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 19:08:44,876 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 11 [2018-12-09 19:08:44,876 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 19:08:44,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-09 19:08:44,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-09 19:08:44,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-12-09 19:08:44,877 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 11 states. [2018-12-09 19:08:44,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 19:08:44,913 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2018-12-09 19:08:44,913 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-09 19:08:44,913 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2018-12-09 19:08:44,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 19:08:44,914 INFO L225 Difference]: With dead ends: 51 [2018-12-09 19:08:44,914 INFO L226 Difference]: Without dead ends: 43 [2018-12-09 19:08:44,914 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 [2018-12-09 19:08:44,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-12-09 19:08:44,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2018-12-09 19:08:44,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-12-09 19:08:44,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2018-12-09 19:08:44,918 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 37 [2018-12-09 19:08:44,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 19:08:44,918 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2018-12-09 19:08:44,918 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-09 19:08:44,918 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2018-12-09 19:08:44,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-12-09 19:08:44,919 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 19:08:44,919 INFO L402 BasicCegarLoop]: trace histogram [10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 19:08:44,919 INFO L423 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 19:08:44,919 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 19:08:44,920 INFO L82 PathProgramCache]: Analyzing trace with hash 1032151993, now seen corresponding path program 7 times [2018-12-09 19:08:44,920 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 19:08:44,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:08:44,920 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 19:08:44,921 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:08:44,921 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 19:08:44,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 19:08:44,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 19:08:44,951 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2018-12-09 19:08:44,969 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 07:08:44 BoogieIcfgContainer [2018-12-09 19:08:44,970 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-09 19:08:44,970 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-09 19:08:44,970 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-09 19:08:44,970 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-09 19:08:44,970 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:08:42" (3/4) ... [2018-12-09 19:08:44,972 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-12-09 19:08:45,006 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_21910ac6-c413-43dc-bd19-28cd4e8c4fb0/bin-2019/utaipan/witness.graphml [2018-12-09 19:08:45,006 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-09 19:08:45,007 INFO L168 Benchmark]: Toolchain (without parser) took 2866.64 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 158.3 MB). Free memory was 950.8 MB in the beginning and 1.1 GB in the end (delta: -198.3 MB). There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 19:08:45,008 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 976.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 19:08:45,008 INFO L168 Benchmark]: CACSL2BoogieTranslator took 131.02 ms. Allocated memory is still 1.0 GB. Free memory was 950.8 MB in the beginning and 940.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-12-09 19:08:45,008 INFO L168 Benchmark]: Boogie Procedure Inliner took 10.68 ms. Allocated memory is still 1.0 GB. Free memory is still 940.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 19:08:45,009 INFO L168 Benchmark]: Boogie Preprocessor took 11.27 ms. Allocated memory is still 1.0 GB. Free memory is still 940.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 19:08:45,009 INFO L168 Benchmark]: RCFGBuilder took 137.13 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 118.5 MB). Free memory was 940.0 MB in the beginning and 1.1 GB in the end (delta: -164.7 MB). Peak memory consumption was 15.9 MB. Max. memory is 11.5 GB. [2018-12-09 19:08:45,009 INFO L168 Benchmark]: TraceAbstraction took 2537.09 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 39.8 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -44.3 MB). There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 19:08:45,009 INFO L168 Benchmark]: Witness Printer took 36.45 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 19:08:45,010 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 976.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 131.02 ms. Allocated memory is still 1.0 GB. Free memory was 950.8 MB in the beginning and 940.0 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 10.68 ms. Allocated memory is still 1.0 GB. Free memory is still 940.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 11.27 ms. Allocated memory is still 1.0 GB. Free memory is still 940.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 137.13 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 118.5 MB). Free memory was 940.0 MB in the beginning and 1.1 GB in the end (delta: -164.7 MB). Peak memory consumption was 15.9 MB. Max. memory is 11.5 GB. * TraceAbstraction took 2537.09 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 39.8 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -44.3 MB). There was no memory consumed. Max. memory is 11.5 GB. * Witness Printer took 36.45 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - 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=0, n=10] [L14] COND TRUE i<10 [L15] sn = sn + (2) VAL [i=1, n=10, n=2] [L13] i++ VAL [i=2, n=2, n=10] [L13] COND TRUE i<=n VAL [i=2, n=10, n=2] [L14] COND TRUE i<10 [L15] sn = sn + (2) VAL [i=2, n=4, n=10] [L13] i++ VAL [i=3, n=4, n=10] [L13] COND TRUE i<=n VAL [i=3, n=4, n=10] [L14] COND TRUE i<10 [L15] sn = sn + (2) VAL [i=3, n=6, n=10] [L13] i++ VAL [i=4, n=6, n=10] [L13] COND TRUE i<=n VAL [i=4, n=10, n=6] [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=14, n=10] [L13] i++ VAL [i=8, n=14, n=10] [L13] COND TRUE i<=n VAL [i=8, n=14, n=10] [L14] COND TRUE i<10 [L15] sn = sn + (2) VAL [i=8, n=10, n=16] [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=10, n=18] [L13] i++ VAL [i=11, n=10, n=18] [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, 2.5s 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, 0.2s 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...