./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/ldv-regression/test24_false-unreach-call.c --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_f9318e1a-56ce-4e4e-badf-c4e0645a945c/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_f9318e1a-56ce-4e4e-badf-c4e0645a945c/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_f9318e1a-56ce-4e4e-badf-c4e0645a945c/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_f9318e1a-56ce-4e4e-badf-c4e0645a945c/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ldv-regression/test24_false-unreach-call.c -s /tmp/vcloud-vcloud-master/worker/working_dir_f9318e1a-56ce-4e4e-badf-c4e0645a945c/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_f9318e1a-56ce-4e4e-badf-c4e0645a945c/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 45294379b83c6b60e0b0199955cdf7244f057430 ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 12:59:37,477 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-18 12:59:37,478 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-18 12:59:37,484 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-18 12:59:37,484 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-18 12:59:37,485 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-18 12:59:37,486 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-18 12:59:37,487 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-18 12:59:37,488 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-18 12:59:37,489 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-18 12:59:37,489 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-18 12:59:37,489 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-18 12:59:37,490 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-18 12:59:37,491 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-18 12:59:37,492 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-18 12:59:37,492 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-18 12:59:37,493 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-18 12:59:37,494 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-18 12:59:37,495 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-18 12:59:37,496 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-18 12:59:37,497 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-18 12:59:37,498 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-18 12:59:37,500 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-18 12:59:37,500 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-18 12:59:37,500 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-18 12:59:37,501 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-18 12:59:37,501 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-18 12:59:37,502 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-18 12:59:37,502 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-18 12:59:37,503 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-18 12:59:37,503 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-18 12:59:37,503 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-18 12:59:37,503 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-18 12:59:37,503 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-18 12:59:37,504 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-18 12:59:37,504 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-18 12:59:37,504 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_f9318e1a-56ce-4e4e-badf-c4e0645a945c/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-11-18 12:59:37,511 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-18 12:59:37,511 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-18 12:59:37,512 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-18 12:59:37,512 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-11-18 12:59:37,513 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-18 12:59:37,513 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-18 12:59:37,513 INFO L133 SettingsManager]: * Use SBE=true [2018-11-18 12:59:37,513 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-18 12:59:37,513 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-18 12:59:37,513 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-18 12:59:37,514 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-18 12:59:37,514 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-18 12:59:37,514 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-18 12:59:37,514 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-18 12:59:37,514 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-18 12:59:37,514 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-18 12:59:37,514 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-18 12:59:37,515 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-18 12:59:37,515 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-18 12:59:37,515 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-18 12:59:37,515 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-18 12:59:37,515 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-18 12:59:37,515 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-18 12:59:37,515 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 12:59:37,516 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-18 12:59:37,516 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-18 12:59:37,516 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-18 12:59:37,516 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-18 12:59:37,516 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-18 12:59:37,516 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-18 12:59:37,516 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_f9318e1a-56ce-4e4e-badf-c4e0645a945c/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 -> 45294379b83c6b60e0b0199955cdf7244f057430 [2018-11-18 12:59:37,542 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-18 12:59:37,551 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-18 12:59:37,553 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-18 12:59:37,554 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-18 12:59:37,555 INFO L276 PluginConnector]: CDTParser initialized [2018-11-18 12:59:37,555 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_f9318e1a-56ce-4e4e-badf-c4e0645a945c/bin-2019/uautomizer/../../sv-benchmarks/c/ldv-regression/test24_false-unreach-call.c [2018-11-18 12:59:37,601 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_f9318e1a-56ce-4e4e-badf-c4e0645a945c/bin-2019/uautomizer/data/67c1851fe/8e048268544c4566a4a1d22d1c8da924/FLAGf1bb1584c [2018-11-18 12:59:37,935 INFO L307 CDTParser]: Found 1 translation units. [2018-11-18 12:59:37,936 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_f9318e1a-56ce-4e4e-badf-c4e0645a945c/sv-benchmarks/c/ldv-regression/test24_false-unreach-call.c [2018-11-18 12:59:37,940 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_f9318e1a-56ce-4e4e-badf-c4e0645a945c/bin-2019/uautomizer/data/67c1851fe/8e048268544c4566a4a1d22d1c8da924/FLAGf1bb1584c [2018-11-18 12:59:38,357 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_f9318e1a-56ce-4e4e-badf-c4e0645a945c/bin-2019/uautomizer/data/67c1851fe/8e048268544c4566a4a1d22d1c8da924 [2018-11-18 12:59:38,359 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-18 12:59:38,360 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-18 12:59:38,360 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-18 12:59:38,360 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-18 12:59:38,363 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-18 12:59:38,364 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 12:59:38" (1/1) ... [2018-11-18 12:59:38,366 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1574628e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:59:38, skipping insertion in model container [2018-11-18 12:59:38,366 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 12:59:38" (1/1) ... [2018-11-18 12:59:38,372 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-18 12:59:38,386 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-18 12:59:38,501 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 12:59:38,505 INFO L191 MainTranslator]: Completed pre-run [2018-11-18 12:59:38,518 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 12:59:38,528 INFO L195 MainTranslator]: Completed translation [2018-11-18 12:59:38,529 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:59:38 WrapperNode [2018-11-18 12:59:38,529 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-18 12:59:38,529 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-18 12:59:38,529 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-18 12:59:38,529 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-18 12:59:38,537 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:59:38" (1/1) ... [2018-11-18 12:59:38,537 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:59:38" (1/1) ... [2018-11-18 12:59:38,543 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:59:38" (1/1) ... [2018-11-18 12:59:38,543 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:59:38" (1/1) ... [2018-11-18 12:59:38,549 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:59:38" (1/1) ... [2018-11-18 12:59:38,552 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:59:38" (1/1) ... [2018-11-18 12:59:38,553 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:59:38" (1/1) ... [2018-11-18 12:59:38,555 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-18 12:59:38,555 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-18 12:59:38,556 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-18 12:59:38,556 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-18 12:59:38,556 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:59:38" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f9318e1a-56ce-4e4e-badf-c4e0645a945c/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 12:59:38,627 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-18 12:59:38,627 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-18 12:59:38,627 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2018-11-18 12:59:38,627 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-18 12:59:38,628 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-11-18 12:59:38,628 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-11-18 12:59:38,628 INFO L130 BoogieDeclarations]: Found specification of procedure check [2018-11-18 12:59:38,628 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2018-11-18 12:59:38,628 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-18 12:59:38,628 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-11-18 12:59:38,628 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2018-11-18 12:59:38,629 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-11-18 12:59:38,629 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-18 12:59:38,629 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-18 12:59:38,629 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2018-11-18 12:59:38,766 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-18 12:59:38,767 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 12:59:38 BoogieIcfgContainer [2018-11-18 12:59:38,767 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-18 12:59:38,767 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-18 12:59:38,767 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-18 12:59:38,770 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-18 12:59:38,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 12:59:38" (1/3) ... [2018-11-18 12:59:38,770 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15ebe462 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 12:59:38, skipping insertion in model container [2018-11-18 12:59:38,771 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:59:38" (2/3) ... [2018-11-18 12:59:38,771 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15ebe462 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 12:59:38, skipping insertion in model container [2018-11-18 12:59:38,771 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 12:59:38" (3/3) ... [2018-11-18 12:59:38,772 INFO L112 eAbstractionObserver]: Analyzing ICFG test24_false-unreach-call.c [2018-11-18 12:59:38,780 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-18 12:59:38,786 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-18 12:59:38,798 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-18 12:59:38,822 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-18 12:59:38,822 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-18 12:59:38,823 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-18 12:59:38,823 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-18 12:59:38,823 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-18 12:59:38,823 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-18 12:59:38,823 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-18 12:59:38,823 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-18 12:59:38,823 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-18 12:59:38,836 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2018-11-18 12:59:38,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-11-18 12:59:38,840 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:59:38,841 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:59:38,843 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:59:38,848 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:59:38,848 INFO L82 PathProgramCache]: Analyzing trace with hash -812155503, now seen corresponding path program 1 times [2018-11-18 12:59:38,849 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 12:59:38,849 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 12:59:38,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:59:38,879 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:59:38,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:59:38,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:59:38,935 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 12:59:38,936 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 12:59:38,937 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-18 12:59:38,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-11-18 12:59:38,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-11-18 12:59:38,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-18 12:59:38,948 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 2 states. [2018-11-18 12:59:38,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:59:38,961 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2018-11-18 12:59:38,961 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-11-18 12:59:38,962 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2018-11-18 12:59:38,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:59:38,968 INFO L225 Difference]: With dead ends: 45 [2018-11-18 12:59:38,968 INFO L226 Difference]: Without dead ends: 22 [2018-11-18 12:59:38,971 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 12:59:38,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-11-18 12:59:38,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-11-18 12:59:38,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-11-18 12:59:38,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2018-11-18 12:59:38,994 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 17 [2018-11-18 12:59:38,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:59:38,994 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2018-11-18 12:59:38,994 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-11-18 12:59:38,994 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2018-11-18 12:59:38,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-11-18 12:59:38,995 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:59:38,995 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:59:38,995 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:59:38,995 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:59:38,996 INFO L82 PathProgramCache]: Analyzing trace with hash 401379044, now seen corresponding path program 1 times [2018-11-18 12:59:38,996 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 12:59:38,996 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 12:59:38,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:59:38,997 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:59:38,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:59:39,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:59:39,039 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 12:59:39,039 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 12:59:39,039 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-18 12:59:39,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-18 12:59:39,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-18 12:59:39,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-18 12:59:39,041 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 3 states. [2018-11-18 12:59:39,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:59:39,066 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2018-11-18 12:59:39,066 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-18 12:59:39,067 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2018-11-18 12:59:39,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:59:39,067 INFO L225 Difference]: With dead ends: 38 [2018-11-18 12:59:39,067 INFO L226 Difference]: Without dead ends: 25 [2018-11-18 12:59:39,068 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-18 12:59:39,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-11-18 12:59:39,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2018-11-18 12:59:39,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-11-18 12:59:39,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2018-11-18 12:59:39,073 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 20 [2018-11-18 12:59:39,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:59:39,073 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2018-11-18 12:59:39,073 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-18 12:59:39,073 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2018-11-18 12:59:39,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-11-18 12:59:39,074 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:59:39,074 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:59:39,074 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:59:39,075 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:59:39,076 INFO L82 PathProgramCache]: Analyzing trace with hash 227309715, now seen corresponding path program 1 times [2018-11-18 12:59:39,076 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 12:59:39,076 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 12:59:39,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:59:39,077 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:59:39,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:59:39,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:59:39,131 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 12:59:39,132 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:59:39,132 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f9318e1a-56ce-4e4e-badf-c4e0645a945c/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 12:59:39,145 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:59:39,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:59:39,174 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:59:39,191 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 12:59:39,218 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 12:59:39,218 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-11-18 12:59:39,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 12:59:39,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 12:59:39,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-11-18 12:59:39,219 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 5 states. [2018-11-18 12:59:39,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:59:39,242 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2018-11-18 12:59:39,243 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-18 12:59:39,243 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2018-11-18 12:59:39,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:59:39,244 INFO L225 Difference]: With dead ends: 41 [2018-11-18 12:59:39,244 INFO L226 Difference]: Without dead ends: 28 [2018-11-18 12:59:39,244 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-11-18 12:59:39,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-11-18 12:59:39,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2018-11-18 12:59:39,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-11-18 12:59:39,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-11-18 12:59:39,248 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 23 [2018-11-18 12:59:39,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:59:39,248 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-11-18 12:59:39,249 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 12:59:39,249 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-11-18 12:59:39,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-11-18 12:59:39,249 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:59:39,249 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:59:39,250 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:59:39,250 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:59:39,250 INFO L82 PathProgramCache]: Analyzing trace with hash -1446544252, now seen corresponding path program 2 times [2018-11-18 12:59:39,250 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 12:59:39,250 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 12:59:39,251 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:59:39,251 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:59:39,251 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:59:39,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:59:39,291 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:59:39,291 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:59:39,291 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f9318e1a-56ce-4e4e-badf-c4e0645a945c/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 12:59:39,297 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-18 12:59:39,319 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-18 12:59:39,319 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 12:59:39,321 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:59:39,347 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:59:39,366 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 12:59:39,366 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2018-11-18 12:59:39,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-18 12:59:39,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-18 12:59:39,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-11-18 12:59:39,367 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 6 states. [2018-11-18 12:59:39,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:59:39,385 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2018-11-18 12:59:39,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 12:59:39,385 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2018-11-18 12:59:39,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:59:39,386 INFO L225 Difference]: With dead ends: 44 [2018-11-18 12:59:39,386 INFO L226 Difference]: Without dead ends: 31 [2018-11-18 12:59:39,386 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-11-18 12:59:39,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-11-18 12:59:39,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2018-11-18 12:59:39,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-11-18 12:59:39,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2018-11-18 12:59:39,389 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 26 [2018-11-18 12:59:39,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:59:39,390 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2018-11-18 12:59:39,390 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-18 12:59:39,390 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2018-11-18 12:59:39,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-11-18 12:59:39,390 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:59:39,391 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:59:39,391 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:59:39,391 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:59:39,391 INFO L82 PathProgramCache]: Analyzing trace with hash 1635198707, now seen corresponding path program 3 times [2018-11-18 12:59:39,391 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 12:59:39,391 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 12:59:39,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:59:39,392 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 12:59:39,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:59:39,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:59:39,451 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:59:39,452 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:59:39,452 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f9318e1a-56ce-4e4e-badf-c4e0645a945c/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 12:59:39,458 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 12:59:39,483 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-11-18 12:59:39,483 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 12:59:39,484 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:59:39,492 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:59:39,514 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 12:59:39,514 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2018-11-18 12:59:39,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-18 12:59:39,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-18 12:59:39,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-11-18 12:59:39,515 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 7 states. [2018-11-18 12:59:39,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:59:39,532 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2018-11-18 12:59:39,532 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-18 12:59:39,532 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2018-11-18 12:59:39,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:59:39,533 INFO L225 Difference]: With dead ends: 47 [2018-11-18 12:59:39,533 INFO L226 Difference]: Without dead ends: 34 [2018-11-18 12:59:39,533 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-11-18 12:59:39,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-11-18 12:59:39,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2018-11-18 12:59:39,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-11-18 12:59:39,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2018-11-18 12:59:39,536 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 29 [2018-11-18 12:59:39,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:59:39,536 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2018-11-18 12:59:39,536 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-18 12:59:39,536 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2018-11-18 12:59:39,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-11-18 12:59:39,537 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:59:39,537 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:59:39,537 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:59:39,537 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:59:39,537 INFO L82 PathProgramCache]: Analyzing trace with hash 618770980, now seen corresponding path program 4 times [2018-11-18 12:59:39,537 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 12:59:39,537 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 12:59:39,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:59:39,538 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 12:59:39,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:59:39,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:59:39,614 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:59:39,614 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:59:39,614 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f9318e1a-56ce-4e4e-badf-c4e0645a945c/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 12:59:39,626 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-18 12:59:39,644 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-18 12:59:39,644 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 12:59:39,646 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:59:39,668 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:59:39,686 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 12:59:39,686 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2018-11-18 12:59:39,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-18 12:59:39,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-18 12:59:39,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-11-18 12:59:39,687 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 8 states. [2018-11-18 12:59:39,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:59:39,716 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2018-11-18 12:59:39,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-18 12:59:39,719 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2018-11-18 12:59:39,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:59:39,720 INFO L225 Difference]: With dead ends: 50 [2018-11-18 12:59:39,720 INFO L226 Difference]: Without dead ends: 37 [2018-11-18 12:59:39,720 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-11-18 12:59:39,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-11-18 12:59:39,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2018-11-18 12:59:39,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-11-18 12:59:39,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2018-11-18 12:59:39,724 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 32 [2018-11-18 12:59:39,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:59:39,724 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2018-11-18 12:59:39,724 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-18 12:59:39,724 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2018-11-18 12:59:39,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-11-18 12:59:39,725 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:59:39,725 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:59:39,725 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:59:39,725 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:59:39,725 INFO L82 PathProgramCache]: Analyzing trace with hash -260207277, now seen corresponding path program 5 times [2018-11-18 12:59:39,725 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 12:59:39,726 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 12:59:39,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:59:39,726 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 12:59:39,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:59:39,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:59:39,793 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:59:39,793 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:59:39,793 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f9318e1a-56ce-4e4e-badf-c4e0645a945c/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 12:59:39,802 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-18 12:59:39,853 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-11-18 12:59:39,853 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 12:59:39,855 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:59:39,886 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:59:39,901 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 12:59:39,901 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2018-11-18 12:59:39,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-18 12:59:39,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-18 12:59:39,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-11-18 12:59:39,902 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 9 states. [2018-11-18 12:59:39,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:59:39,948 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2018-11-18 12:59:39,953 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-18 12:59:39,953 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 35 [2018-11-18 12:59:39,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:59:39,954 INFO L225 Difference]: With dead ends: 53 [2018-11-18 12:59:39,954 INFO L226 Difference]: Without dead ends: 40 [2018-11-18 12:59:39,955 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-11-18 12:59:39,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-11-18 12:59:39,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2018-11-18 12:59:39,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-11-18 12:59:39,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2018-11-18 12:59:39,959 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 35 [2018-11-18 12:59:39,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:59:39,959 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2018-11-18 12:59:39,959 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-18 12:59:39,959 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2018-11-18 12:59:39,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-11-18 12:59:39,964 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:59:39,964 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:59:39,964 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:59:39,964 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:59:39,965 INFO L82 PathProgramCache]: Analyzing trace with hash 514142148, now seen corresponding path program 6 times [2018-11-18 12:59:39,965 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 12:59:39,965 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 12:59:39,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:59:39,966 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 12:59:39,966 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:59:39,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:59:40,057 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:59:40,057 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:59:40,057 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f9318e1a-56ce-4e4e-badf-c4e0645a945c/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 12:59:40,064 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-18 12:59:40,127 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-11-18 12:59:40,127 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 12:59:40,129 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:59:40,141 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:59:40,156 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 12:59:40,157 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2018-11-18 12:59:40,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-18 12:59:40,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-18 12:59:40,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-11-18 12:59:40,158 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 10 states. [2018-11-18 12:59:40,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:59:40,227 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2018-11-18 12:59:40,227 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-18 12:59:40,228 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 38 [2018-11-18 12:59:40,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:59:40,228 INFO L225 Difference]: With dead ends: 56 [2018-11-18 12:59:40,228 INFO L226 Difference]: Without dead ends: 43 [2018-11-18 12:59:40,229 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-11-18 12:59:40,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-11-18 12:59:40,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2018-11-18 12:59:40,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-11-18 12:59:40,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2018-11-18 12:59:40,233 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 38 [2018-11-18 12:59:40,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:59:40,234 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2018-11-18 12:59:40,234 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-18 12:59:40,234 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2018-11-18 12:59:40,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-11-18 12:59:40,235 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:59:40,235 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:59:40,236 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:59:40,236 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:59:40,236 INFO L82 PathProgramCache]: Analyzing trace with hash 888515507, now seen corresponding path program 7 times [2018-11-18 12:59:40,236 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 12:59:40,236 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 12:59:40,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:59:40,237 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 12:59:40,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:59:40,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:59:40,314 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:59:40,314 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:59:40,315 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f9318e1a-56ce-4e4e-badf-c4e0645a945c/bin-2019/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 12:59:40,324 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:59:40,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:59:40,345 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:59:40,361 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:59:40,381 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 12:59:40,382 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2018-11-18 12:59:40,382 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-18 12:59:40,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-18 12:59:40,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-11-18 12:59:40,383 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 11 states. [2018-11-18 12:59:40,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:59:40,415 INFO L93 Difference]: Finished difference Result 59 states and 61 transitions. [2018-11-18 12:59:40,415 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-18 12:59:40,415 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2018-11-18 12:59:40,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:59:40,416 INFO L225 Difference]: With dead ends: 59 [2018-11-18 12:59:40,416 INFO L226 Difference]: Without dead ends: 46 [2018-11-18 12:59:40,416 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-11-18 12:59:40,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-11-18 12:59:40,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2018-11-18 12:59:40,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-11-18 12:59:40,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2018-11-18 12:59:40,420 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 41 [2018-11-18 12:59:40,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:59:40,421 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2018-11-18 12:59:40,421 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-18 12:59:40,421 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2018-11-18 12:59:40,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-11-18 12:59:40,422 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:59:40,422 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:59:40,422 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:59:40,422 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:59:40,422 INFO L82 PathProgramCache]: Analyzing trace with hash -184814236, now seen corresponding path program 8 times [2018-11-18 12:59:40,423 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 12:59:40,423 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 12:59:40,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:59:40,423 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:59:40,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:59:40,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:59:40,503 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:59:40,503 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:59:40,503 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f9318e1a-56ce-4e4e-badf-c4e0645a945c/bin-2019/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 12:59:40,512 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-18 12:59:40,539 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-18 12:59:40,539 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 12:59:40,542 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:59:40,564 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:59:40,580 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 12:59:40,580 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2018-11-18 12:59:40,580 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-18 12:59:40,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-18 12:59:40,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-11-18 12:59:40,581 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 12 states. [2018-11-18 12:59:40,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:59:40,622 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2018-11-18 12:59:40,623 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-18 12:59:40,623 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 44 [2018-11-18 12:59:40,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:59:40,623 INFO L225 Difference]: With dead ends: 62 [2018-11-18 12:59:40,623 INFO L226 Difference]: Without dead ends: 49 [2018-11-18 12:59:40,624 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-11-18 12:59:40,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-11-18 12:59:40,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2018-11-18 12:59:40,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-11-18 12:59:40,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2018-11-18 12:59:40,627 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 44 [2018-11-18 12:59:40,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:59:40,628 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2018-11-18 12:59:40,628 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-18 12:59:40,628 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2018-11-18 12:59:40,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-11-18 12:59:40,628 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:59:40,628 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:59:40,628 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:59:40,629 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:59:40,629 INFO L82 PathProgramCache]: Analyzing trace with hash 280330771, now seen corresponding path program 9 times [2018-11-18 12:59:40,629 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 12:59:40,629 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 12:59:40,629 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:59:40,629 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 12:59:40,629 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:59:40,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:59:40,703 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:59:40,703 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:59:40,703 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f9318e1a-56ce-4e4e-badf-c4e0645a945c/bin-2019/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 12:59:40,711 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 12:59:40,872 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-11-18 12:59:40,872 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 12:59:40,874 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:59:40,886 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:59:40,903 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 12:59:40,903 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2018-11-18 12:59:40,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-18 12:59:40,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-18 12:59:40,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-11-18 12:59:40,904 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 13 states. [2018-11-18 12:59:40,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:59:40,927 INFO L93 Difference]: Finished difference Result 65 states and 67 transitions. [2018-11-18 12:59:40,927 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-18 12:59:40,927 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 47 [2018-11-18 12:59:40,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:59:40,928 INFO L225 Difference]: With dead ends: 65 [2018-11-18 12:59:40,928 INFO L226 Difference]: Without dead ends: 52 [2018-11-18 12:59:40,928 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-11-18 12:59:40,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-11-18 12:59:40,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2018-11-18 12:59:40,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-11-18 12:59:40,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2018-11-18 12:59:40,931 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 47 [2018-11-18 12:59:40,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:59:40,934 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2018-11-18 12:59:40,934 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-18 12:59:40,934 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2018-11-18 12:59:40,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-11-18 12:59:40,935 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:59:40,935 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:59:40,935 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:59:40,935 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:59:40,935 INFO L82 PathProgramCache]: Analyzing trace with hash 1850737412, now seen corresponding path program 10 times [2018-11-18 12:59:40,936 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 12:59:40,936 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 12:59:40,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:59:40,936 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 12:59:40,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:59:40,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:59:41,064 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:59:41,064 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:59:41,065 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f9318e1a-56ce-4e4e-badf-c4e0645a945c/bin-2019/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 12:59:41,073 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-18 12:59:41,102 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-18 12:59:41,102 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 12:59:41,104 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:59:41,132 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:59:41,147 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 12:59:41,148 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2018-11-18 12:59:41,148 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-18 12:59:41,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-18 12:59:41,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-11-18 12:59:41,148 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 14 states. [2018-11-18 12:59:41,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:59:41,181 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2018-11-18 12:59:41,183 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-18 12:59:41,183 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 50 [2018-11-18 12:59:41,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:59:41,184 INFO L225 Difference]: With dead ends: 68 [2018-11-18 12:59:41,184 INFO L226 Difference]: Without dead ends: 55 [2018-11-18 12:59:41,184 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-11-18 12:59:41,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-11-18 12:59:41,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2018-11-18 12:59:41,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-11-18 12:59:41,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2018-11-18 12:59:41,188 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 50 [2018-11-18 12:59:41,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:59:41,188 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2018-11-18 12:59:41,188 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-18 12:59:41,189 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2018-11-18 12:59:41,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-11-18 12:59:41,189 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:59:41,189 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:59:41,190 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:59:41,190 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:59:41,190 INFO L82 PathProgramCache]: Analyzing trace with hash 756224115, now seen corresponding path program 11 times [2018-11-18 12:59:41,190 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 12:59:41,190 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 12:59:41,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:59:41,191 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 12:59:41,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:59:41,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:59:41,287 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:59:41,287 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:59:41,287 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f9318e1a-56ce-4e4e-badf-c4e0645a945c/bin-2019/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 12:59:41,295 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-18 12:59:41,448 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-11-18 12:59:41,448 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 12:59:41,451 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:59:41,479 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:59:41,495 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 12:59:41,495 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2018-11-18 12:59:41,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-18 12:59:41,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-18 12:59:41,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-11-18 12:59:41,496 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 15 states. [2018-11-18 12:59:41,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:59:41,527 INFO L93 Difference]: Finished difference Result 71 states and 73 transitions. [2018-11-18 12:59:41,531 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-18 12:59:41,532 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 53 [2018-11-18 12:59:41,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:59:41,532 INFO L225 Difference]: With dead ends: 71 [2018-11-18 12:59:41,532 INFO L226 Difference]: Without dead ends: 58 [2018-11-18 12:59:41,533 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-11-18 12:59:41,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-11-18 12:59:41,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2018-11-18 12:59:41,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-11-18 12:59:41,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2018-11-18 12:59:41,536 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 53 [2018-11-18 12:59:41,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:59:41,537 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2018-11-18 12:59:41,537 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-18 12:59:41,537 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2018-11-18 12:59:41,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-11-18 12:59:41,538 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:59:41,538 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:59:41,538 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:59:41,538 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:59:41,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1502304420, now seen corresponding path program 12 times [2018-11-18 12:59:41,538 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 12:59:41,538 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 12:59:41,539 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:59:41,539 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 12:59:41,539 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:59:41,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:59:41,649 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:59:41,649 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:59:41,650 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f9318e1a-56ce-4e4e-badf-c4e0645a945c/bin-2019/uautomizer/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 12:59:41,661 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-18 12:59:42,332 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-11-18 12:59:42,332 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 12:59:42,335 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:59:42,351 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:59:42,372 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 12:59:42,372 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2018-11-18 12:59:42,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-18 12:59:42,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-18 12:59:42,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-11-18 12:59:42,373 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 16 states. [2018-11-18 12:59:42,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:59:42,400 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2018-11-18 12:59:42,400 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-18 12:59:42,401 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 56 [2018-11-18 12:59:42,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:59:42,401 INFO L225 Difference]: With dead ends: 74 [2018-11-18 12:59:42,401 INFO L226 Difference]: Without dead ends: 61 [2018-11-18 12:59:42,401 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-11-18 12:59:42,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-11-18 12:59:42,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2018-11-18 12:59:42,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-11-18 12:59:42,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2018-11-18 12:59:42,405 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 56 [2018-11-18 12:59:42,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:59:42,406 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2018-11-18 12:59:42,406 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-18 12:59:42,406 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2018-11-18 12:59:42,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-11-18 12:59:42,406 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:59:42,406 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:59:42,406 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:59:42,407 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:59:42,407 INFO L82 PathProgramCache]: Analyzing trace with hash 1524913875, now seen corresponding path program 13 times [2018-11-18 12:59:42,407 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 12:59:42,407 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 12:59:42,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:59:42,407 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 12:59:42,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:59:42,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:59:42,518 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:59:42,518 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:59:42,518 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f9318e1a-56ce-4e4e-badf-c4e0645a945c/bin-2019/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 12:59:42,529 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:59:42,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:59:42,549 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:59:42,573 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:59:42,588 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 12:59:42,588 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2018-11-18 12:59:42,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-18 12:59:42,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-18 12:59:42,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-11-18 12:59:42,589 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 17 states. [2018-11-18 12:59:42,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:59:42,626 INFO L93 Difference]: Finished difference Result 77 states and 79 transitions. [2018-11-18 12:59:42,627 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-18 12:59:42,628 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 59 [2018-11-18 12:59:42,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:59:42,628 INFO L225 Difference]: With dead ends: 77 [2018-11-18 12:59:42,628 INFO L226 Difference]: Without dead ends: 64 [2018-11-18 12:59:42,629 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-11-18 12:59:42,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-11-18 12:59:42,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2018-11-18 12:59:42,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-11-18 12:59:42,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2018-11-18 12:59:42,631 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 59 [2018-11-18 12:59:42,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:59:42,632 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2018-11-18 12:59:42,632 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-18 12:59:42,632 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2018-11-18 12:59:42,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-11-18 12:59:42,632 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:59:42,632 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:59:42,633 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:59:42,633 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:59:42,633 INFO L82 PathProgramCache]: Analyzing trace with hash 773322308, now seen corresponding path program 14 times [2018-11-18 12:59:42,633 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 12:59:42,633 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 12:59:42,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:59:42,634 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:59:42,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:59:42,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:59:42,759 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:59:42,760 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:59:42,760 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f9318e1a-56ce-4e4e-badf-c4e0645a945c/bin-2019/uautomizer/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 12:59:42,768 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-18 12:59:42,787 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-18 12:59:42,788 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 12:59:42,789 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:59:42,801 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:59:42,826 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 12:59:42,826 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2018-11-18 12:59:42,826 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-18 12:59:42,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-18 12:59:42,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-11-18 12:59:42,826 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 18 states. [2018-11-18 12:59:42,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:59:42,896 INFO L93 Difference]: Finished difference Result 80 states and 82 transitions. [2018-11-18 12:59:42,896 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-18 12:59:42,896 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 62 [2018-11-18 12:59:42,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:59:42,897 INFO L225 Difference]: With dead ends: 80 [2018-11-18 12:59:42,897 INFO L226 Difference]: Without dead ends: 67 [2018-11-18 12:59:42,897 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-11-18 12:59:42,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-11-18 12:59:42,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2018-11-18 12:59:42,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-11-18 12:59:42,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2018-11-18 12:59:42,901 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 62 [2018-11-18 12:59:42,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:59:42,901 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2018-11-18 12:59:42,901 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-18 12:59:42,901 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2018-11-18 12:59:42,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-11-18 12:59:42,902 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:59:42,902 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:59:42,902 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:59:42,902 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:59:42,902 INFO L82 PathProgramCache]: Analyzing trace with hash -226536141, now seen corresponding path program 15 times [2018-11-18 12:59:42,902 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 12:59:42,902 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 12:59:42,903 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:59:42,903 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 12:59:42,903 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:59:42,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:59:43,018 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:59:43,018 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:59:43,018 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f9318e1a-56ce-4e4e-badf-c4e0645a945c/bin-2019/uautomizer/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 12:59:43,024 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 12:59:44,856 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-11-18 12:59:44,856 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 12:59:44,860 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:59:44,870 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:59:44,890 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 12:59:44,890 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2018-11-18 12:59:44,890 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-11-18 12:59:44,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-11-18 12:59:44,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-11-18 12:59:44,890 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 19 states. [2018-11-18 12:59:44,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:59:44,926 INFO L93 Difference]: Finished difference Result 83 states and 85 transitions. [2018-11-18 12:59:44,926 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-11-18 12:59:44,926 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 65 [2018-11-18 12:59:44,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:59:44,927 INFO L225 Difference]: With dead ends: 83 [2018-11-18 12:59:44,927 INFO L226 Difference]: Without dead ends: 70 [2018-11-18 12:59:44,927 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-11-18 12:59:44,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-11-18 12:59:44,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2018-11-18 12:59:44,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-11-18 12:59:44,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2018-11-18 12:59:44,931 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 65 [2018-11-18 12:59:44,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:59:44,931 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2018-11-18 12:59:44,931 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-11-18 12:59:44,931 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2018-11-18 12:59:44,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-11-18 12:59:44,932 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:59:44,932 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:59:44,932 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:59:44,932 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:59:44,932 INFO L82 PathProgramCache]: Analyzing trace with hash -1411392540, now seen corresponding path program 16 times [2018-11-18 12:59:44,932 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 12:59:44,932 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 12:59:44,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:59:44,932 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 12:59:44,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:59:44,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:59:45,047 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:59:45,047 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:59:45,047 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f9318e1a-56ce-4e4e-badf-c4e0645a945c/bin-2019/uautomizer/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 12:59:45,053 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-18 12:59:45,073 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-18 12:59:45,073 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 12:59:45,075 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:59:45,086 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:59:45,102 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 12:59:45,102 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2018-11-18 12:59:45,102 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-18 12:59:45,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-18 12:59:45,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-11-18 12:59:45,103 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 20 states. [2018-11-18 12:59:45,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:59:45,141 INFO L93 Difference]: Finished difference Result 86 states and 88 transitions. [2018-11-18 12:59:45,141 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-11-18 12:59:45,141 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 68 [2018-11-18 12:59:45,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:59:45,141 INFO L225 Difference]: With dead ends: 86 [2018-11-18 12:59:45,141 INFO L226 Difference]: Without dead ends: 73 [2018-11-18 12:59:45,141 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-11-18 12:59:45,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-11-18 12:59:45,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2018-11-18 12:59:45,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-11-18 12:59:45,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2018-11-18 12:59:45,144 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 68 [2018-11-18 12:59:45,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:59:45,144 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2018-11-18 12:59:45,144 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-18 12:59:45,144 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2018-11-18 12:59:45,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-11-18 12:59:45,145 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:59:45,145 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:59:45,145 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:59:45,145 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:59:45,145 INFO L82 PathProgramCache]: Analyzing trace with hash 867830675, now seen corresponding path program 17 times [2018-11-18 12:59:45,145 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 12:59:45,145 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 12:59:45,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:59:45,146 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 12:59:45,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:59:45,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:59:45,274 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:59:45,274 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:59:45,274 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f9318e1a-56ce-4e4e-badf-c4e0645a945c/bin-2019/uautomizer/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 12:59:45,280 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-18 12:59:46,909 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-11-18 12:59:46,909 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 12:59:46,915 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:59:46,943 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:59:46,971 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 12:59:46,971 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2018-11-18 12:59:46,971 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-11-18 12:59:46,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-18 12:59:46,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-11-18 12:59:46,972 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 21 states. [2018-11-18 12:59:47,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:59:47,032 INFO L93 Difference]: Finished difference Result 89 states and 91 transitions. [2018-11-18 12:59:47,032 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-11-18 12:59:47,032 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 71 [2018-11-18 12:59:47,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:59:47,033 INFO L225 Difference]: With dead ends: 89 [2018-11-18 12:59:47,033 INFO L226 Difference]: Without dead ends: 76 [2018-11-18 12:59:47,033 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-11-18 12:59:47,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-11-18 12:59:47,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2018-11-18 12:59:47,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-11-18 12:59:47,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2018-11-18 12:59:47,036 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 71 [2018-11-18 12:59:47,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:59:47,037 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2018-11-18 12:59:47,037 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-11-18 12:59:47,037 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2018-11-18 12:59:47,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-11-18 12:59:47,038 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:59:47,038 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:59:47,038 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:59:47,038 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:59:47,038 INFO L82 PathProgramCache]: Analyzing trace with hash 2068646276, now seen corresponding path program 18 times [2018-11-18 12:59:47,038 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 12:59:47,038 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 12:59:47,039 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:59:47,039 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 12:59:47,039 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:59:47,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:59:47,266 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:59:47,266 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:59:47,266 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f9318e1a-56ce-4e4e-badf-c4e0645a945c/bin-2019/uautomizer/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 12:59:47,273 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-18 12:59:53,704 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-11-18 12:59:53,705 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 12:59:53,713 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:59:53,724 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:59:53,753 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 12:59:53,753 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2018-11-18 12:59:53,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-11-18 12:59:53,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-11-18 12:59:53,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-11-18 12:59:53,754 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 22 states. [2018-11-18 12:59:53,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:59:53,792 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2018-11-18 12:59:53,792 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-11-18 12:59:53,792 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 74 [2018-11-18 12:59:53,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:59:53,793 INFO L225 Difference]: With dead ends: 92 [2018-11-18 12:59:53,793 INFO L226 Difference]: Without dead ends: 79 [2018-11-18 12:59:53,794 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-11-18 12:59:53,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-11-18 12:59:53,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2018-11-18 12:59:53,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-11-18 12:59:53,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2018-11-18 12:59:53,797 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 74 [2018-11-18 12:59:53,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:59:53,797 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2018-11-18 12:59:53,797 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-11-18 12:59:53,797 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2018-11-18 12:59:53,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-11-18 12:59:53,797 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:59:53,797 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:59:53,797 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:59:53,798 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:59:53,798 INFO L82 PathProgramCache]: Analyzing trace with hash -1511360013, now seen corresponding path program 19 times [2018-11-18 12:59:53,798 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 12:59:53,798 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 12:59:53,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:59:53,798 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 12:59:53,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:59:53,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:59:53,949 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:59:53,949 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:59:53,949 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f9318e1a-56ce-4e4e-badf-c4e0645a945c/bin-2019/uautomizer/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 12:59:53,956 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:59:53,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:59:53,973 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:59:53,985 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:59:54,002 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 12:59:54,003 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2018-11-18 12:59:54,003 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-11-18 12:59:54,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-11-18 12:59:54,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-11-18 12:59:54,003 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 23 states. [2018-11-18 12:59:54,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:59:54,036 INFO L93 Difference]: Finished difference Result 94 states and 96 transitions. [2018-11-18 12:59:54,037 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-11-18 12:59:54,037 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 77 [2018-11-18 12:59:54,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:59:54,037 INFO L225 Difference]: With dead ends: 94 [2018-11-18 12:59:54,037 INFO L226 Difference]: Without dead ends: 81 [2018-11-18 12:59:54,038 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-11-18 12:59:54,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-11-18 12:59:54,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-11-18 12:59:54,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-11-18 12:59:54,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2018-11-18 12:59:54,040 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 77 [2018-11-18 12:59:54,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:59:54,040 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2018-11-18 12:59:54,040 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-11-18 12:59:54,040 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2018-11-18 12:59:54,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-11-18 12:59:54,041 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:59:54,041 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:59:54,041 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:59:54,041 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:59:54,041 INFO L82 PathProgramCache]: Analyzing trace with hash -850821340, now seen corresponding path program 20 times [2018-11-18 12:59:54,041 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 12:59:54,041 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 12:59:54,042 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:59:54,042 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:59:54,042 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:59:54,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 12:59:54,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 12:59:54,113 INFO L442 BasicCegarLoop]: Counterexample might be feasible [2018-11-18 12:59:54,140 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.11 12:59:54 BoogieIcfgContainer [2018-11-18 12:59:54,140 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-18 12:59:54,141 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-18 12:59:54,141 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-18 12:59:54,141 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-18 12:59:54,141 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 12:59:38" (3/4) ... [2018-11-18 12:59:54,143 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-11-18 12:59:54,186 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_f9318e1a-56ce-4e4e-badf-c4e0645a945c/bin-2019/uautomizer/witness.graphml [2018-11-18 12:59:54,186 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-18 12:59:54,187 INFO L168 Benchmark]: Toolchain (without parser) took 15827.57 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 181.9 MB). Free memory was 960.9 MB in the beginning and 976.0 MB in the end (delta: -15.1 MB). Peak memory consumption was 166.8 MB. Max. memory is 11.5 GB. [2018-11-18 12:59:54,188 INFO L168 Benchmark]: CDTParser took 0.56 ms. Allocated memory is still 1.0 GB. Free memory is still 982.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 12:59:54,188 INFO L168 Benchmark]: CACSL2BoogieTranslator took 168.62 ms. Allocated memory is still 1.0 GB. Free memory was 960.9 MB in the beginning and 944.7 MB in the end (delta: 16.1 MB). Peak memory consumption was 16.1 MB. Max. memory is 11.5 GB. [2018-11-18 12:59:54,188 INFO L168 Benchmark]: Boogie Preprocessor took 25.98 ms. Allocated memory is still 1.0 GB. Free memory is still 944.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 12:59:54,188 INFO L168 Benchmark]: RCFGBuilder took 211.34 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 135.3 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -168.3 MB). Peak memory consumption was 14.5 MB. Max. memory is 11.5 GB. [2018-11-18 12:59:54,189 INFO L168 Benchmark]: TraceAbstraction took 15373.07 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 46.7 MB). Free memory was 1.1 GB in the beginning and 981.8 MB in the end (delta: 131.2 MB). Peak memory consumption was 177.9 MB. Max. memory is 11.5 GB. [2018-11-18 12:59:54,189 INFO L168 Benchmark]: Witness Printer took 45.62 ms. Allocated memory is still 1.2 GB. Free memory was 981.8 MB in the beginning and 976.0 MB in the end (delta: 5.8 MB). Peak memory consumption was 5.8 MB. Max. memory is 11.5 GB. [2018-11-18 12:59:54,190 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.56 ms. Allocated memory is still 1.0 GB. Free memory is still 982.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 168.62 ms. Allocated memory is still 1.0 GB. Free memory was 960.9 MB in the beginning and 944.7 MB in the end (delta: 16.1 MB). Peak memory consumption was 16.1 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 25.98 ms. Allocated memory is still 1.0 GB. Free memory is still 944.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 211.34 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 135.3 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -168.3 MB). Peak memory consumption was 14.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 15373.07 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 46.7 MB). Free memory was 1.1 GB in the beginning and 981.8 MB in the end (delta: 131.2 MB). Peak memory consumption was 177.9 MB. Max. memory is 11.5 GB. * Witness Printer took 45.62 ms. Allocated memory is still 1.2 GB. Free memory was 981.8 MB in the beginning and 976.0 MB in the end (delta: 5.8 MB). Peak memory consumption was 5.8 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 37]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L15] FCALL struct dummy ad1[20], *ad2; [L16] int i, j, *pa; [L17] j=0 VAL [ad1={161:0}, j=0] [L17] COND TRUE j<20 [L18] FCALL ad1[j].a = __VERIFIER_nondet_int() [L19] FCALL ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={161:0}, j=1] [L17] COND TRUE j<20 [L18] FCALL ad1[j].a = __VERIFIER_nondet_int() [L19] FCALL ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={161:0}, j=2] [L17] COND TRUE j<20 [L18] FCALL ad1[j].a = __VERIFIER_nondet_int() [L19] FCALL ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={161:0}, j=3] [L17] COND TRUE j<20 [L18] FCALL ad1[j].a = __VERIFIER_nondet_int() [L19] FCALL ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={161:0}, j=4] [L17] COND TRUE j<20 [L18] FCALL ad1[j].a = __VERIFIER_nondet_int() [L19] FCALL ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={161:0}, j=5] [L17] COND TRUE j<20 [L18] FCALL ad1[j].a = __VERIFIER_nondet_int() [L19] FCALL ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={161:0}, j=6] [L17] COND TRUE j<20 [L18] FCALL ad1[j].a = __VERIFIER_nondet_int() [L19] FCALL ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={161:0}, j=7] [L17] COND TRUE j<20 [L18] FCALL ad1[j].a = __VERIFIER_nondet_int() [L19] FCALL ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={161:0}, j=8] [L17] COND TRUE j<20 [L18] FCALL ad1[j].a = __VERIFIER_nondet_int() [L19] FCALL ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={161:0}, j=9] [L17] COND TRUE j<20 [L18] FCALL ad1[j].a = __VERIFIER_nondet_int() [L19] FCALL ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={161:0}, j=10] [L17] COND TRUE j<20 [L18] FCALL ad1[j].a = __VERIFIER_nondet_int() [L19] FCALL ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={161:0}, j=11] [L17] COND TRUE j<20 [L18] FCALL ad1[j].a = __VERIFIER_nondet_int() [L19] FCALL ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={161:0}, j=12] [L17] COND TRUE j<20 [L18] FCALL ad1[j].a = __VERIFIER_nondet_int() [L19] FCALL ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={161:0}, j=13] [L17] COND TRUE j<20 [L18] FCALL ad1[j].a = __VERIFIER_nondet_int() [L19] FCALL ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={161:0}, j=14] [L17] COND TRUE j<20 [L18] FCALL ad1[j].a = __VERIFIER_nondet_int() [L19] FCALL ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={161:0}, j=15] [L17] COND TRUE j<20 [L18] FCALL ad1[j].a = __VERIFIER_nondet_int() [L19] FCALL ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={161:0}, j=16] [L17] COND TRUE j<20 [L18] FCALL ad1[j].a = __VERIFIER_nondet_int() [L19] FCALL ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={161:0}, j=17] [L17] COND TRUE j<20 [L18] FCALL ad1[j].a = __VERIFIER_nondet_int() [L19] FCALL ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={161:0}, j=18] [L17] COND TRUE j<20 [L18] FCALL ad1[j].a = __VERIFIER_nondet_int() [L19] FCALL ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={161:0}, j=19] [L17] COND TRUE j<20 [L18] FCALL ad1[j].a = __VERIFIER_nondet_int() [L19] FCALL ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={161:0}, j=20] [L17] COND FALSE !(j<20) VAL [ad1={161:0}, j=20] [L21] i = __VERIFIER_nondet_int() [L22] COND TRUE i >= 0 && i < 10 [L23] ad2 = ad1 [L24] FCALL ad1[i].a = i [L25] pa = &ad1[i].a [L26] EXPR, FCALL ad2[i].a [L26] i = ad2[i].a + 10 [L27] EXPR, FCALL \read(*pa) VAL [\read(*pa)=0, ad1={161:0}, ad2={161:0}, i=10, j=20, pa={161:0}] [L27] COND FALSE !(i < *pa) [L30] CALL, EXPR check(ad1, i) VAL [\old(b)=10, ad1={161:0}] [L10] EXPR, FCALL ad1[b].a [L10] RET return ad1[b].a == b; [L30] EXPR check(ad1, i) VAL [ad1={161:0}, ad2={161:0}, check(ad1, i)=0, i=10, j=20, pa={161:0}] [L30] COND TRUE !check(ad1, i) [L37] __VERIFIER_error() VAL [ad1={161:0}, ad2={161:0}, i=10, j=20, pa={161:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 27 locations, 1 error locations. UNSAFE Result, 15.3s OverallTime, 22 OverallIterations, 21 TraceHistogramMax, 0.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 449 SDtfs, 210 SDslu, 3032 SDs, 0 SdLazy, 643 SolverSat, 25 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1183 GetRequests, 954 SyntacticMatches, 0 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 1.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=81occurred in iteration=21, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 21 MinimizatonAttempts, 19 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 11.3s SatisfiabilityAnalysisTime, 2.1s InterpolantComputationTime, 2017 NumberOfCodeBlocks, 2017 NumberOfCodeBlocksAsserted, 143 NumberOfCheckSat, 1897 ConstructedInterpolants, 0 QuantifiedInterpolants, 241879 SizeOfPredicates, 19 NumberOfNonLiveVariables, 3287 ConjunctsInSsa, 228 ConjunctsInUnsatCore, 40 InterpolantComputations, 2 PerfectInterpolantSequences, 0/7600 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...