./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/loops/sum01_bug02_false-unreach-call_true-termination.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5842f4b8 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_112bbedf-1f3c-4826-acc8-01091daf2bf8/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_112bbedf-1f3c-4826-acc8-01091daf2bf8/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_112bbedf-1f3c-4826-acc8-01091daf2bf8/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_112bbedf-1f3c-4826-acc8-01091daf2bf8/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops/sum01_bug02_false-unreach-call_true-termination.i -s /tmp/vcloud-vcloud-master/worker/working_dir_112bbedf-1f3c-4826-acc8-01091daf2bf8/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_112bbedf-1f3c-4826-acc8-01091daf2bf8/bin-2019/uautomizer --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c5465a084053aead702161d951dd339bfa1665d5 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 0.1.23-5842f4b [2018-11-18 13:17:34,475 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-18 13:17:34,476 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-18 13:17:34,482 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-18 13:17:34,482 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-18 13:17:34,483 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-18 13:17:34,484 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-18 13:17:34,485 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-18 13:17:34,486 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-18 13:17:34,486 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-18 13:17:34,487 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-18 13:17:34,487 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-18 13:17:34,488 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-18 13:17:34,488 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-18 13:17:34,489 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-18 13:17:34,489 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-18 13:17:34,490 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-18 13:17:34,491 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-18 13:17:34,492 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-18 13:17:34,493 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-18 13:17:34,493 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-18 13:17:34,494 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-18 13:17:34,495 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-18 13:17:34,495 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-18 13:17:34,495 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-18 13:17:34,496 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-18 13:17:34,496 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-18 13:17:34,497 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-18 13:17:34,497 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-18 13:17:34,498 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-18 13:17:34,498 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-18 13:17:34,499 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-18 13:17:34,499 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-18 13:17:34,499 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-18 13:17:34,500 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-18 13:17:34,500 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-18 13:17:34,500 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_112bbedf-1f3c-4826-acc8-01091daf2bf8/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-11-18 13:17:34,508 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-18 13:17:34,508 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-18 13:17:34,508 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-18 13:17:34,508 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-11-18 13:17:34,509 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-18 13:17:34,509 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-18 13:17:34,509 INFO L133 SettingsManager]: * Use SBE=true [2018-11-18 13:17:34,509 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-18 13:17:34,509 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-18 13:17:34,510 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-18 13:17:34,510 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-18 13:17:34,510 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-18 13:17:34,510 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-18 13:17:34,510 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-18 13:17:34,510 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-18 13:17:34,510 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-18 13:17:34,510 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-18 13:17:34,510 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-18 13:17:34,511 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-18 13:17:34,511 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-18 13:17:34,511 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-18 13:17:34,511 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-18 13:17:34,511 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-18 13:17:34,511 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 13:17:34,511 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-18 13:17:34,511 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-18 13:17:34,512 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-18 13:17:34,512 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-18 13:17:34,512 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-18 13:17:34,512 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-18 13:17:34,512 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true 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_112bbedf-1f3c-4826-acc8-01091daf2bf8/bin-2019/uautomizer 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 -> Automizer 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 -> c5465a084053aead702161d951dd339bfa1665d5 [2018-11-18 13:17:34,533 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-18 13:17:34,541 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-18 13:17:34,543 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-18 13:17:34,544 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-18 13:17:34,544 INFO L276 PluginConnector]: CDTParser initialized [2018-11-18 13:17:34,544 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_112bbedf-1f3c-4826-acc8-01091daf2bf8/bin-2019/uautomizer/../../sv-benchmarks/c/loops/sum01_bug02_false-unreach-call_true-termination.i [2018-11-18 13:17:34,579 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_112bbedf-1f3c-4826-acc8-01091daf2bf8/bin-2019/uautomizer/data/1dbfece94/97571a8fc44141f7b146931f7e126e08/FLAGad0c0b21b [2018-11-18 13:17:34,968 INFO L307 CDTParser]: Found 1 translation units. [2018-11-18 13:17:34,969 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_112bbedf-1f3c-4826-acc8-01091daf2bf8/sv-benchmarks/c/loops/sum01_bug02_false-unreach-call_true-termination.i [2018-11-18 13:17:34,972 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_112bbedf-1f3c-4826-acc8-01091daf2bf8/bin-2019/uautomizer/data/1dbfece94/97571a8fc44141f7b146931f7e126e08/FLAGad0c0b21b [2018-11-18 13:17:34,980 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_112bbedf-1f3c-4826-acc8-01091daf2bf8/bin-2019/uautomizer/data/1dbfece94/97571a8fc44141f7b146931f7e126e08 [2018-11-18 13:17:34,982 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-18 13:17:34,983 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-18 13:17:34,984 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-18 13:17:34,984 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-18 13:17:34,987 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-18 13:17:34,987 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 01:17:34" (1/1) ... [2018-11-18 13:17:34,989 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@562934e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:17:34, skipping insertion in model container [2018-11-18 13:17:34,989 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 01:17:34" (1/1) ... [2018-11-18 13:17:34,995 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-18 13:17:35,009 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-18 13:17:35,107 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 13:17:35,109 INFO L191 MainTranslator]: Completed pre-run [2018-11-18 13:17:35,119 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 13:17:35,129 INFO L195 MainTranslator]: Completed translation [2018-11-18 13:17:35,129 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:17:35 WrapperNode [2018-11-18 13:17:35,129 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-18 13:17:35,130 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-18 13:17:35,130 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-18 13:17:35,130 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-18 13:17:35,137 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:17:35" (1/1) ... [2018-11-18 13:17:35,137 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:17:35" (1/1) ... [2018-11-18 13:17:35,140 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:17:35" (1/1) ... [2018-11-18 13:17:35,140 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:17:35" (1/1) ... [2018-11-18 13:17:35,142 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:17:35" (1/1) ... [2018-11-18 13:17:35,145 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:17:35" (1/1) ... [2018-11-18 13:17:35,146 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:17:35" (1/1) ... [2018-11-18 13:17:35,146 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-18 13:17:35,147 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-18 13:17:35,147 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-18 13:17:35,147 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-18 13:17:35,148 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:17:35" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_112bbedf-1f3c-4826-acc8-01091daf2bf8/bin-2019/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 13:17:35,216 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-18 13:17:35,216 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-18 13:17:35,216 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-11-18 13:17:35,216 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-18 13:17:35,217 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-11-18 13:17:35,217 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-11-18 13:17:35,217 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2018-11-18 13:17:35,217 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-18 13:17:35,217 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-18 13:17:35,217 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-18 13:17:35,331 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-18 13:17:35,332 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 01:17:35 BoogieIcfgContainer [2018-11-18 13:17:35,332 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-18 13:17:35,332 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-18 13:17:35,333 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-18 13:17:35,334 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-18 13:17:35,335 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 01:17:34" (1/3) ... [2018-11-18 13:17:35,335 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21060eab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 01:17:35, skipping insertion in model container [2018-11-18 13:17:35,335 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:17:35" (2/3) ... [2018-11-18 13:17:35,336 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21060eab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 01:17:35, skipping insertion in model container [2018-11-18 13:17:35,336 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 01:17:35" (3/3) ... [2018-11-18 13:17:35,337 INFO L112 eAbstractionObserver]: Analyzing ICFG sum01_bug02_false-unreach-call_true-termination.i [2018-11-18 13:17:35,344 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-18 13:17:35,350 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-18 13:17:35,361 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-18 13:17:35,387 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-18 13:17:35,387 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-18 13:17:35,387 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-18 13:17:35,388 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-18 13:17:35,388 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-18 13:17:35,388 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-18 13:17:35,388 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-18 13:17:35,388 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-18 13:17:35,388 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-18 13:17:35,402 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2018-11-18 13:17:35,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-11-18 13:17:35,407 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:17:35,407 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:17:35,409 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:17:35,414 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:17:35,414 INFO L82 PathProgramCache]: Analyzing trace with hash -2007171518, now seen corresponding path program 1 times [2018-11-18 13:17:35,415 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 13:17:35,416 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 13:17:35,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:17:35,454 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:17:35,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:17:35,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:17:35,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 13:17:35,494 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 13:17:35,495 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-18 13:17:35,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-11-18 13:17:35,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-11-18 13:17:35,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-18 13:17:35,506 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2018-11-18 13:17:35,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:17:35,519 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2018-11-18 13:17:35,519 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-11-18 13:17:35,519 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2018-11-18 13:17:35,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:17:35,524 INFO L225 Difference]: With dead ends: 32 [2018-11-18 13:17:35,524 INFO L226 Difference]: Without dead ends: 15 [2018-11-18 13:17:35,526 INFO L604 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 [2018-11-18 13:17:35,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-11-18 13:17:35,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-11-18 13:17:35,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-11-18 13:17:35,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-11-18 13:17:35,551 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2018-11-18 13:17:35,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:17:35,552 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2018-11-18 13:17:35,552 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-11-18 13:17:35,552 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2018-11-18 13:17:35,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-11-18 13:17:35,552 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:17:35,552 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:17:35,553 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:17:35,553 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:17:35,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1715017247, now seen corresponding path program 1 times [2018-11-18 13:17:35,553 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 13:17:35,553 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 13:17:35,554 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:17:35,554 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:17:35,554 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:17:35,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:17:35,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 13:17:35,616 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 13:17:35,616 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-18 13:17:35,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 13:17:35,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 13:17:35,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-18 13:17:35,617 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 5 states. [2018-11-18 13:17:35,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:17:35,651 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2018-11-18 13:17:35,651 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 13:17:35,652 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2018-11-18 13:17:35,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:17:35,652 INFO L225 Difference]: With dead ends: 25 [2018-11-18 13:17:35,652 INFO L226 Difference]: Without dead ends: 20 [2018-11-18 13:17:35,653 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-18 13:17:35,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-11-18 13:17:35,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-11-18 13:17:35,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-11-18 13:17:35,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2018-11-18 13:17:35,656 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 11 [2018-11-18 13:17:35,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:17:35,656 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2018-11-18 13:17:35,656 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 13:17:35,657 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2018-11-18 13:17:35,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-11-18 13:17:35,657 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:17:35,657 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:17:35,657 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:17:35,657 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:17:35,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1428843034, now seen corresponding path program 1 times [2018-11-18 13:17:35,657 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 13:17:35,658 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 13:17:35,658 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:17:35,658 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:17:35,658 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:17:35,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:17:35,846 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 13:17:35,847 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:17:35,847 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_112bbedf-1f3c-4826-acc8-01091daf2bf8/bin-2019/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 13:17:35,869 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:17:35,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:17:35,884 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:17:36,013 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 13:17:36,028 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 13:17:36,029 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2018-11-18 13:17:36,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-18 13:17:36,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-18 13:17:36,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2018-11-18 13:17:36,030 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 14 states. [2018-11-18 13:17:36,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:17:36,190 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2018-11-18 13:17:36,191 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-18 13:17:36,191 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 16 [2018-11-18 13:17:36,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:17:36,192 INFO L225 Difference]: With dead ends: 45 [2018-11-18 13:17:36,192 INFO L226 Difference]: Without dead ends: 39 [2018-11-18 13:17:36,193 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2018-11-18 13:17:36,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-11-18 13:17:36,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2018-11-18 13:17:36,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-11-18 13:17:36,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2018-11-18 13:17:36,199 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 16 [2018-11-18 13:17:36,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:17:36,199 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2018-11-18 13:17:36,199 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-18 13:17:36,199 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2018-11-18 13:17:36,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-11-18 13:17:36,200 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:17:36,200 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:17:36,200 INFO L423 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:17:36,200 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:17:36,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1947322111, now seen corresponding path program 1 times [2018-11-18 13:17:36,201 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 13:17:36,201 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 13:17:36,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:17:36,201 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:17:36,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:17:36,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:17:36,243 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 13:17:36,243 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:17:36,244 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_112bbedf-1f3c-4826-acc8-01091daf2bf8/bin-2019/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 13:17:36,252 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:17:36,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:17:36,259 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:17:36,301 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 13:17:36,325 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 13:17:36,326 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2018-11-18 13:17:36,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-18 13:17:36,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-18 13:17:36,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2018-11-18 13:17:36,326 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 8 states. [2018-11-18 13:17:36,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:17:36,347 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2018-11-18 13:17:36,347 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 13:17:36,347 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2018-11-18 13:17:36,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:17:36,348 INFO L225 Difference]: With dead ends: 42 [2018-11-18 13:17:36,348 INFO L226 Difference]: Without dead ends: 27 [2018-11-18 13:17:36,348 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2018-11-18 13:17:36,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-11-18 13:17:36,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-11-18 13:17:36,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-11-18 13:17:36,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-11-18 13:17:36,352 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 21 [2018-11-18 13:17:36,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:17:36,353 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-11-18 13:17:36,353 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-18 13:17:36,353 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-11-18 13:17:36,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-11-18 13:17:36,353 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:17:36,354 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:17:36,354 INFO L423 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:17:36,354 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:17:36,354 INFO L82 PathProgramCache]: Analyzing trace with hash 994455866, now seen corresponding path program 2 times [2018-11-18 13:17:36,354 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 13:17:36,354 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 13:17:36,355 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:17:36,355 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:17:36,355 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:17:36,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:17:36,481 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-11-18 13:17:36,482 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:17:36,482 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_112bbedf-1f3c-4826-acc8-01091daf2bf8/bin-2019/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 13:17:36,495 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-18 13:17:36,503 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-18 13:17:36,503 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 13:17:36,505 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:17:36,638 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 13:17:36,653 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 13:17:36,653 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 19 [2018-11-18 13:17:36,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-11-18 13:17:36,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-11-18 13:17:36,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2018-11-18 13:17:36,654 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 19 states. [2018-11-18 13:17:36,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:17:36,941 INFO L93 Difference]: Finished difference Result 50 states and 55 transitions. [2018-11-18 13:17:36,941 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-11-18 13:17:36,941 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 26 [2018-11-18 13:17:36,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:17:36,942 INFO L225 Difference]: With dead ends: 50 [2018-11-18 13:17:36,942 INFO L226 Difference]: Without dead ends: 44 [2018-11-18 13:17:36,943 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=155, Invalid=901, Unknown=0, NotChecked=0, Total=1056 [2018-11-18 13:17:36,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-11-18 13:17:36,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 28. [2018-11-18 13:17:36,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-11-18 13:17:36,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2018-11-18 13:17:36,948 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 26 [2018-11-18 13:17:36,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:17:36,948 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2018-11-18 13:17:36,948 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-11-18 13:17:36,948 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2018-11-18 13:17:36,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-11-18 13:17:36,949 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:17:36,949 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:17:36,949 INFO L423 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:17:36,949 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:17:36,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1674514236, now seen corresponding path program 2 times [2018-11-18 13:17:36,950 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 13:17:36,950 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 13:17:36,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:17:36,950 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 13:17:36,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:17:36,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:17:36,997 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 13:17:36,997 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:17:36,997 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_112bbedf-1f3c-4826-acc8-01091daf2bf8/bin-2019/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 13:17:37,007 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-18 13:17:37,013 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-18 13:17:37,013 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 13:17:37,014 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:17:37,038 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 13:17:37,052 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 13:17:37,052 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2018-11-18 13:17:37,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-18 13:17:37,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-18 13:17:37,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2018-11-18 13:17:37,053 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 12 states. [2018-11-18 13:17:37,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:17:37,084 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2018-11-18 13:17:37,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-18 13:17:37,084 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 26 [2018-11-18 13:17:37,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:17:37,084 INFO L225 Difference]: With dead ends: 44 [2018-11-18 13:17:37,085 INFO L226 Difference]: Without dead ends: 34 [2018-11-18 13:17:37,085 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2018-11-18 13:17:37,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-11-18 13:17:37,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2018-11-18 13:17:37,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-11-18 13:17:37,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2018-11-18 13:17:37,088 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 26 [2018-11-18 13:17:37,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:17:37,088 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2018-11-18 13:17:37,088 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-18 13:17:37,088 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2018-11-18 13:17:37,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-11-18 13:17:37,089 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:17:37,089 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:17:37,089 INFO L423 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:17:37,090 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:17:37,090 INFO L82 PathProgramCache]: Analyzing trace with hash 162653665, now seen corresponding path program 3 times [2018-11-18 13:17:37,090 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 13:17:37,090 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 13:17:37,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:17:37,091 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 13:17:37,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:17:37,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:17:37,157 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 14 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 13:17:37,157 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:17:37,157 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_112bbedf-1f3c-4826-acc8-01091daf2bf8/bin-2019/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 13:17:37,163 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 13:17:37,172 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-11-18 13:17:37,172 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 13:17:37,173 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:17:37,215 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 14 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 13:17:37,230 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 13:17:37,231 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2018-11-18 13:17:37,231 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-18 13:17:37,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-18 13:17:37,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2018-11-18 13:17:37,232 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 16 states. [2018-11-18 13:17:37,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:17:37,278 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2018-11-18 13:17:37,278 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-18 13:17:37,278 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 31 [2018-11-18 13:17:37,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:17:37,279 INFO L225 Difference]: With dead ends: 49 [2018-11-18 13:17:37,279 INFO L226 Difference]: Without dead ends: 39 [2018-11-18 13:17:37,279 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2018-11-18 13:17:37,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-11-18 13:17:37,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2018-11-18 13:17:37,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-11-18 13:17:37,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2018-11-18 13:17:37,282 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 31 [2018-11-18 13:17:37,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:17:37,282 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2018-11-18 13:17:37,282 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-18 13:17:37,283 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2018-11-18 13:17:37,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-11-18 13:17:37,283 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:17:37,283 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:17:37,283 INFO L423 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:17:37,284 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:17:37,284 INFO L82 PathProgramCache]: Analyzing trace with hash 129265244, now seen corresponding path program 4 times [2018-11-18 13:17:37,284 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 13:17:37,284 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 13:17:37,284 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:17:37,284 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 13:17:37,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:17:37,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:17:37,353 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 18 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 13:17:37,353 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:17:37,353 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_112bbedf-1f3c-4826-acc8-01091daf2bf8/bin-2019/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 13:17:37,359 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-18 13:17:37,366 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-18 13:17:37,366 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 13:17:37,368 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:17:37,420 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 18 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 13:17:37,435 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 13:17:37,435 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2018-11-18 13:17:37,435 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-18 13:17:37,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-18 13:17:37,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=226, Unknown=0, NotChecked=0, Total=380 [2018-11-18 13:17:37,436 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 20 states. [2018-11-18 13:17:37,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:17:37,476 INFO L93 Difference]: Finished difference Result 55 states and 59 transitions. [2018-11-18 13:17:37,476 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-18 13:17:37,476 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 36 [2018-11-18 13:17:37,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:17:37,477 INFO L225 Difference]: With dead ends: 55 [2018-11-18 13:17:37,477 INFO L226 Difference]: Without dead ends: 45 [2018-11-18 13:17:37,477 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=154, Invalid=226, Unknown=0, NotChecked=0, Total=380 [2018-11-18 13:17:37,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-11-18 13:17:37,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2018-11-18 13:17:37,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-11-18 13:17:37,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2018-11-18 13:17:37,481 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 36 [2018-11-18 13:17:37,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:17:37,481 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2018-11-18 13:17:37,481 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-18 13:17:37,481 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2018-11-18 13:17:37,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-11-18 13:17:37,481 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:17:37,481 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:17:37,481 INFO L423 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:17:37,482 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:17:37,482 INFO L82 PathProgramCache]: Analyzing trace with hash 1609235137, now seen corresponding path program 5 times [2018-11-18 13:17:37,482 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 13:17:37,482 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 13:17:37,482 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:17:37,482 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 13:17:37,482 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:17:37,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 13:17:37,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 13:17:37,515 INFO L442 BasicCegarLoop]: Counterexample might be feasible [2018-11-18 13:17:37,537 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.11 01:17:37 BoogieIcfgContainer [2018-11-18 13:17:37,537 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-18 13:17:37,537 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-18 13:17:37,537 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-18 13:17:37,537 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-18 13:17:37,538 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 01:17:35" (3/4) ... [2018-11-18 13:17:37,539 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-11-18 13:17:37,572 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_112bbedf-1f3c-4826-acc8-01091daf2bf8/bin-2019/uautomizer/witness.graphml [2018-11-18 13:17:37,572 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-18 13:17:37,573 INFO L168 Benchmark]: Toolchain (without parser) took 2590.27 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 229.6 MB). Free memory was 963.4 MB in the beginning and 1.2 GB in the end (delta: -192.7 MB). Peak memory consumption was 37.0 MB. Max. memory is 11.5 GB. [2018-11-18 13:17:37,574 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 1.0 GB. Free memory is still 982.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 13:17:37,574 INFO L168 Benchmark]: CACSL2BoogieTranslator took 146.00 ms. Allocated memory is still 1.0 GB. Free memory was 963.4 MB in the beginning and 952.7 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-18 13:17:37,574 INFO L168 Benchmark]: Boogie Preprocessor took 16.75 ms. Allocated memory is still 1.0 GB. Free memory was 952.7 MB in the beginning and 947.3 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2018-11-18 13:17:37,574 INFO L168 Benchmark]: RCFGBuilder took 185.08 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 174.1 MB). Free memory was 947.3 MB in the beginning and 1.2 GB in the end (delta: -210.3 MB). Peak memory consumption was 19.5 MB. Max. memory is 11.5 GB. [2018-11-18 13:17:37,575 INFO L168 Benchmark]: TraceAbstraction took 2204.33 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 55.6 MB). Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 1.5 MB). Peak memory consumption was 57.1 MB. Max. memory is 11.5 GB. [2018-11-18 13:17:37,575 INFO L168 Benchmark]: Witness Printer took 35.23 ms. Allocated memory is still 1.3 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 13:17:37,577 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 1.0 GB. Free memory is still 982.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 146.00 ms. Allocated memory is still 1.0 GB. Free memory was 963.4 MB in the beginning and 952.7 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 16.75 ms. Allocated memory is still 1.0 GB. Free memory was 952.7 MB in the beginning and 947.3 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 185.08 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 174.1 MB). Free memory was 947.3 MB in the beginning and 1.2 GB in the end (delta: -210.3 MB). Peak memory consumption was 19.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 2204.33 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 55.6 MB). Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 1.5 MB). Peak memory consumption was 57.1 MB. Max. memory is 11.5 GB. * Witness Printer took 35.23 ms. Allocated memory is still 1.3 GB. Free memory is still 1.2 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, j=10, n=__VERIFIER_nondet_uint(), sn=0; [L12] int i, j=10, n=__VERIFIER_nondet_uint(), sn=0; [L13] i=1 VAL [i=1, j=10, n=0, n=6] [L13] COND TRUE i<=n VAL [i=1, j=10, n=6, n=0] [L14] COND TRUE i