./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/recursive-simple/id_i10_o10_false-unreach-call_true-termination.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_33d5957e-6bd7-489f-84a5-c5c51d5d139e/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_33d5957e-6bd7-489f-84a5-c5c51d5d139e/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_33d5957e-6bd7-489f-84a5-c5c51d5d139e/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_33d5957e-6bd7-489f-84a5-c5c51d5d139e/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/id_i10_o10_false-unreach-call_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_33d5957e-6bd7-489f-84a5-c5c51d5d139e/bin-2019/uautomizer/config/svcomp-Reach-32bit-PetriAutomizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_33d5957e-6bd7-489f-84a5-c5c51d5d139e/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 0aae719d835771c4602eac7b24cfefa200f147c0 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 09:23:49,544 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-18 09:23:49,545 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-18 09:23:49,551 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-18 09:23:49,551 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-18 09:23:49,552 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-18 09:23:49,553 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-18 09:23:49,554 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-18 09:23:49,555 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-18 09:23:49,556 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-18 09:23:49,556 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-18 09:23:49,556 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-18 09:23:49,557 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-18 09:23:49,558 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-18 09:23:49,558 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-18 09:23:49,559 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-18 09:23:49,559 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-18 09:23:49,560 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-18 09:23:49,562 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-18 09:23:49,562 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-18 09:23:49,563 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-18 09:23:49,564 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-18 09:23:49,566 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-18 09:23:49,566 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-18 09:23:49,566 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-18 09:23:49,567 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-18 09:23:49,567 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-18 09:23:49,567 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-18 09:23:49,568 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-18 09:23:49,569 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-18 09:23:49,569 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-18 09:23:49,569 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-18 09:23:49,570 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-18 09:23:49,570 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-18 09:23:49,570 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-18 09:23:49,571 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-18 09:23:49,571 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_33d5957e-6bd7-489f-84a5-c5c51d5d139e/bin-2019/uautomizer/config/svcomp-Reach-32bit-PetriAutomizer_Default.epf [2018-11-18 09:23:49,581 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-18 09:23:49,581 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-18 09:23:49,582 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-18 09:23:49,582 INFO L133 SettingsManager]: * Process only entry and re-entry procedures=false [2018-11-18 09:23:49,582 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-18 09:23:49,582 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-18 09:23:49,583 INFO L133 SettingsManager]: * Use SBE=true [2018-11-18 09:23:49,583 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-18 09:23:49,583 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-18 09:23:49,583 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-18 09:23:49,583 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-18 09:23:49,583 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-18 09:23:49,583 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-18 09:23:49,583 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-18 09:23:49,584 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-18 09:23:49,584 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-18 09:23:49,584 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-18 09:23:49,584 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-18 09:23:49,584 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-18 09:23:49,584 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-18 09:23:49,584 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-18 09:23:49,585 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-18 09:23:49,585 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-18 09:23:49,585 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 09:23:49,585 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-18 09:23:49,585 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-18 09:23:49,585 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-18 09:23:49,585 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-18 09:23:49,585 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-18 09:23:49,586 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-18 09:23:49,586 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_33d5957e-6bd7-489f-84a5-c5c51d5d139e/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 -> 0aae719d835771c4602eac7b24cfefa200f147c0 [2018-11-18 09:23:49,609 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-18 09:23:49,618 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-18 09:23:49,621 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-18 09:23:49,622 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-18 09:23:49,622 INFO L276 PluginConnector]: CDTParser initialized [2018-11-18 09:23:49,623 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_33d5957e-6bd7-489f-84a5-c5c51d5d139e/bin-2019/uautomizer/../../sv-benchmarks/c/recursive-simple/id_i10_o10_false-unreach-call_true-termination.c [2018-11-18 09:23:49,665 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_33d5957e-6bd7-489f-84a5-c5c51d5d139e/bin-2019/uautomizer/data/02330f5f7/5ea483c2abe84e39aa889b0ea04a8e93/FLAGdce06b559 [2018-11-18 09:23:50,064 INFO L307 CDTParser]: Found 1 translation units. [2018-11-18 09:23:50,064 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_33d5957e-6bd7-489f-84a5-c5c51d5d139e/sv-benchmarks/c/recursive-simple/id_i10_o10_false-unreach-call_true-termination.c [2018-11-18 09:23:50,068 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_33d5957e-6bd7-489f-84a5-c5c51d5d139e/bin-2019/uautomizer/data/02330f5f7/5ea483c2abe84e39aa889b0ea04a8e93/FLAGdce06b559 [2018-11-18 09:23:50,079 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_33d5957e-6bd7-489f-84a5-c5c51d5d139e/bin-2019/uautomizer/data/02330f5f7/5ea483c2abe84e39aa889b0ea04a8e93 [2018-11-18 09:23:50,082 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-18 09:23:50,083 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-18 09:23:50,084 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-18 09:23:50,084 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-18 09:23:50,087 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-18 09:23:50,088 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 09:23:50" (1/1) ... [2018-11-18 09:23:50,090 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3cf76dfb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:23:50, skipping insertion in model container [2018-11-18 09:23:50,090 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 09:23:50" (1/1) ... [2018-11-18 09:23:50,098 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-18 09:23:50,112 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-18 09:23:50,220 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 09:23:50,222 INFO L191 MainTranslator]: Completed pre-run [2018-11-18 09:23:50,229 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 09:23:50,238 INFO L195 MainTranslator]: Completed translation [2018-11-18 09:23:50,238 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:23:50 WrapperNode [2018-11-18 09:23:50,238 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-18 09:23:50,238 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-18 09:23:50,239 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-18 09:23:50,239 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-18 09:23:50,247 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:23:50" (1/1) ... [2018-11-18 09:23:50,248 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:23:50" (1/1) ... [2018-11-18 09:23:50,250 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:23:50" (1/1) ... [2018-11-18 09:23:50,251 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:23:50" (1/1) ... [2018-11-18 09:23:50,252 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:23:50" (1/1) ... [2018-11-18 09:23:50,254 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:23:50" (1/1) ... [2018-11-18 09:23:50,254 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:23:50" (1/1) ... [2018-11-18 09:23:50,255 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-18 09:23:50,255 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-18 09:23:50,255 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-18 09:23:50,255 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-18 09:23:50,256 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:23:50" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_33d5957e-6bd7-489f-84a5-c5c51d5d139e/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 09:23:50,323 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-18 09:23:50,323 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-18 09:23:50,323 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2018-11-18 09:23:50,323 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-18 09:23:50,323 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-11-18 09:23:50,323 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-11-18 09:23:50,324 INFO L130 BoogieDeclarations]: Found specification of procedure id [2018-11-18 09:23:50,324 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-18 09:23:50,324 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-18 09:23:50,324 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-18 09:23:50,412 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-18 09:23:50,413 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 09:23:50 BoogieIcfgContainer [2018-11-18 09:23:50,413 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-18 09:23:50,414 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-18 09:23:50,414 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-18 09:23:50,416 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-18 09:23:50,416 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 09:23:50" (1/3) ... [2018-11-18 09:23:50,416 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@200d7230 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 09:23:50, skipping insertion in model container [2018-11-18 09:23:50,416 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:23:50" (2/3) ... [2018-11-18 09:23:50,417 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@200d7230 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 09:23:50, skipping insertion in model container [2018-11-18 09:23:50,417 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 09:23:50" (3/3) ... [2018-11-18 09:23:50,418 INFO L112 eAbstractionObserver]: Analyzing ICFG id_i10_o10_false-unreach-call_true-termination.c [2018-11-18 09:23:50,423 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-18 09:23:50,428 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-18 09:23:50,436 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-18 09:23:50,454 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-18 09:23:50,454 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-18 09:23:50,454 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-18 09:23:50,454 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-18 09:23:50,454 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-18 09:23:50,454 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-18 09:23:50,455 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-18 09:23:50,455 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-18 09:23:50,455 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-18 09:23:50,467 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2018-11-18 09:23:50,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-18 09:23:50,471 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 09:23:50,471 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 09:23:50,473 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 09:23:50,476 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 09:23:50,476 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2018-11-18 09:23:50,478 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 09:23:50,478 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 09:23:50,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:23:50,507 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 09:23:50,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:23:50,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 09:23:50,587 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 09:23:50,589 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 09:23:50,589 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-18 09:23:50,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 09:23:50,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 09:23:50,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-18 09:23:50,606 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2018-11-18 09:23:50,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 09:23:50,668 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2018-11-18 09:23:50,669 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 09:23:50,669 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-11-18 09:23:50,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 09:23:50,677 INFO L225 Difference]: With dead ends: 30 [2018-11-18 09:23:50,677 INFO L226 Difference]: Without dead ends: 18 [2018-11-18 09:23:50,679 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-18 09:23:50,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-11-18 09:23:50,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-11-18 09:23:50,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-11-18 09:23:50,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2018-11-18 09:23:50,703 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2018-11-18 09:23:50,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 09:23:50,704 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2018-11-18 09:23:50,704 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 09:23:50,704 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2018-11-18 09:23:50,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-11-18 09:23:50,705 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 09:23:50,705 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 09:23:50,705 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 09:23:50,706 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 09:23:50,706 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2018-11-18 09:23:50,706 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 09:23:50,706 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 09:23:50,706 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:23:50,707 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 09:23:50,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:23:50,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 09:23:50,760 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-18 09:23:50,761 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 09:23:50,761 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_33d5957e-6bd7-489f-84a5-c5c51d5d139e/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 09:23:50,774 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 09:23:50,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 09:23:50,791 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 09:23:50,815 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-18 09:23:50,834 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 09:23:50,834 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-11-18 09:23:50,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-18 09:23:50,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-18 09:23:50,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-11-18 09:23:50,835 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2018-11-18 09:23:50,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 09:23:50,896 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2018-11-18 09:23:50,896 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-18 09:23:50,897 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2018-11-18 09:23:50,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 09:23:50,897 INFO L225 Difference]: With dead ends: 25 [2018-11-18 09:23:50,897 INFO L226 Difference]: Without dead ends: 21 [2018-11-18 09:23:50,898 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-11-18 09:23:50,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-11-18 09:23:50,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-11-18 09:23:50,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-11-18 09:23:50,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-11-18 09:23:50,901 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2018-11-18 09:23:50,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 09:23:50,901 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-11-18 09:23:50,901 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-18 09:23:50,902 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-11-18 09:23:50,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-11-18 09:23:50,902 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 09:23:50,902 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 09:23:50,903 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 09:23:50,903 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 09:23:50,903 INFO L82 PathProgramCache]: Analyzing trace with hash 397359997, now seen corresponding path program 2 times [2018-11-18 09:23:50,903 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 09:23:50,903 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 09:23:50,904 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:23:50,904 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 09:23:50,904 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:23:50,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 09:23:50,971 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-18 09:23:50,971 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 09:23:50,971 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_33d5957e-6bd7-489f-84a5-c5c51d5d139e/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 09:23:50,985 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-18 09:23:50,998 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-18 09:23:50,998 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 09:23:51,000 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 09:23:51,011 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-18 09:23:51,027 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 09:23:51,027 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-11-18 09:23:51,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-18 09:23:51,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-18 09:23:51,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2018-11-18 09:23:51,028 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 7 states. [2018-11-18 09:23:51,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 09:23:51,079 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2018-11-18 09:23:51,080 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-18 09:23:51,080 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2018-11-18 09:23:51,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 09:23:51,080 INFO L225 Difference]: With dead ends: 28 [2018-11-18 09:23:51,080 INFO L226 Difference]: Without dead ends: 24 [2018-11-18 09:23:51,081 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-11-18 09:23:51,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-11-18 09:23:51,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-11-18 09:23:51,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-11-18 09:23:51,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2018-11-18 09:23:51,084 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2018-11-18 09:23:51,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 09:23:51,084 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2018-11-18 09:23:51,084 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-18 09:23:51,084 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2018-11-18 09:23:51,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-11-18 09:23:51,085 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 09:23:51,085 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 09:23:51,085 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 09:23:51,085 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 09:23:51,086 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 3 times [2018-11-18 09:23:51,086 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 09:23:51,086 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 09:23:51,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:23:51,086 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 09:23:51,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:23:51,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 09:23:51,165 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-18 09:23:51,165 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 09:23:51,165 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_33d5957e-6bd7-489f-84a5-c5c51d5d139e/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 09:23:51,179 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 09:23:51,191 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-11-18 09:23:51,191 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 09:23:51,193 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 09:23:51,202 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-18 09:23:51,222 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 09:23:51,223 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-11-18 09:23:51,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-18 09:23:51,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-18 09:23:51,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2018-11-18 09:23:51,223 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 11 states. [2018-11-18 09:23:51,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 09:23:51,253 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2018-11-18 09:23:51,253 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-18 09:23:51,254 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2018-11-18 09:23:51,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 09:23:51,254 INFO L225 Difference]: With dead ends: 31 [2018-11-18 09:23:51,254 INFO L226 Difference]: Without dead ends: 27 [2018-11-18 09:23:51,255 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2018-11-18 09:23:51,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-11-18 09:23:51,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-11-18 09:23:51,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-11-18 09:23:51,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-11-18 09:23:51,260 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2018-11-18 09:23:51,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 09:23:51,260 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-11-18 09:23:51,260 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-18 09:23:51,260 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-11-18 09:23:51,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-11-18 09:23:51,261 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 09:23:51,261 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 09:23:51,261 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 09:23:51,261 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 09:23:51,262 INFO L82 PathProgramCache]: Analyzing trace with hash 1080764669, now seen corresponding path program 4 times [2018-11-18 09:23:51,262 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 09:23:51,262 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 09:23:51,262 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:23:51,262 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 09:23:51,262 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:23:51,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 09:23:51,330 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-11-18 09:23:51,330 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 09:23:51,330 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_33d5957e-6bd7-489f-84a5-c5c51d5d139e/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 09:23:51,339 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-18 09:23:51,346 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-18 09:23:51,346 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 09:23:51,348 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 09:23:51,362 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-11-18 09:23:51,387 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 09:23:51,387 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-11-18 09:23:51,387 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-18 09:23:51,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-18 09:23:51,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-11-18 09:23:51,388 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 9 states. [2018-11-18 09:23:51,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 09:23:51,476 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2018-11-18 09:23:51,478 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-18 09:23:51,478 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2018-11-18 09:23:51,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 09:23:51,479 INFO L225 Difference]: With dead ends: 34 [2018-11-18 09:23:51,479 INFO L226 Difference]: Without dead ends: 30 [2018-11-18 09:23:51,479 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2018-11-18 09:23:51,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-11-18 09:23:51,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-11-18 09:23:51,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-11-18 09:23:51,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2018-11-18 09:23:51,485 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2018-11-18 09:23:51,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 09:23:51,485 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2018-11-18 09:23:51,485 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-18 09:23:51,485 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2018-11-18 09:23:51,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-11-18 09:23:51,486 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 09:23:51,486 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 09:23:51,486 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 09:23:51,486 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 09:23:51,486 INFO L82 PathProgramCache]: Analyzing trace with hash -1752970513, now seen corresponding path program 5 times [2018-11-18 09:23:51,487 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 09:23:51,487 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 09:23:51,487 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:23:51,487 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 09:23:51,487 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:23:51,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 09:23:51,602 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-11-18 09:23:51,602 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 09:23:51,602 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_33d5957e-6bd7-489f-84a5-c5c51d5d139e/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 09:23:51,608 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-18 09:23:51,623 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-11-18 09:23:51,623 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 09:23:51,625 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 09:23:51,636 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-11-18 09:23:51,651 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 09:23:51,651 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-11-18 09:23:51,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-18 09:23:51,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-18 09:23:51,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2018-11-18 09:23:51,652 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 15 states. [2018-11-18 09:23:51,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 09:23:51,688 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2018-11-18 09:23:51,688 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-18 09:23:51,688 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 43 [2018-11-18 09:23:51,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 09:23:51,689 INFO L225 Difference]: With dead ends: 37 [2018-11-18 09:23:51,689 INFO L226 Difference]: Without dead ends: 33 [2018-11-18 09:23:51,689 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2018-11-18 09:23:51,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-11-18 09:23:51,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-11-18 09:23:51,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-11-18 09:23:51,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2018-11-18 09:23:51,694 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2018-11-18 09:23:51,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 09:23:51,694 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2018-11-18 09:23:51,694 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-18 09:23:51,694 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2018-11-18 09:23:51,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-11-18 09:23:51,695 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 09:23:51,695 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 09:23:51,696 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 09:23:51,696 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 09:23:51,696 INFO L82 PathProgramCache]: Analyzing trace with hash -1590630787, now seen corresponding path program 6 times [2018-11-18 09:23:51,696 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 09:23:51,696 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 09:23:51,697 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:23:51,697 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 09:23:51,697 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:23:51,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 09:23:51,829 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-11-18 09:23:51,829 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 09:23:51,829 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_33d5957e-6bd7-489f-84a5-c5c51d5d139e/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 09:23:51,839 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-18 09:23:51,857 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-11-18 09:23:51,857 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 09:23:51,859 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 09:23:51,967 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-11-18 09:23:51,982 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 09:23:51,982 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11] total 26 [2018-11-18 09:23:51,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-11-18 09:23:51,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-11-18 09:23:51,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2018-11-18 09:23:51,983 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 26 states. [2018-11-18 09:23:52,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 09:23:52,200 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2018-11-18 09:23:52,200 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-18 09:23:52,200 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 49 [2018-11-18 09:23:52,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 09:23:52,201 INFO L225 Difference]: With dead ends: 40 [2018-11-18 09:23:52,201 INFO L226 Difference]: Without dead ends: 36 [2018-11-18 09:23:52,202 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=279, Invalid=1203, Unknown=0, NotChecked=0, Total=1482 [2018-11-18 09:23:52,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-11-18 09:23:52,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-11-18 09:23:52,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-11-18 09:23:52,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2018-11-18 09:23:52,205 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2018-11-18 09:23:52,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 09:23:52,205 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2018-11-18 09:23:52,205 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-11-18 09:23:52,205 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2018-11-18 09:23:52,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-11-18 09:23:52,206 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 09:23:52,206 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 09:23:52,206 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 09:23:52,206 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 09:23:52,206 INFO L82 PathProgramCache]: Analyzing trace with hash 1532150511, now seen corresponding path program 7 times [2018-11-18 09:23:52,206 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 09:23:52,206 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 09:23:52,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:23:52,207 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 09:23:52,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:23:52,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 09:23:52,322 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-11-18 09:23:52,323 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 09:23:52,323 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_33d5957e-6bd7-489f-84a5-c5c51d5d139e/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 09:23:52,329 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 09:23:52,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 09:23:52,341 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 09:23:52,451 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-11-18 09:23:52,466 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 09:23:52,466 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 12] total 29 [2018-11-18 09:23:52,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-11-18 09:23:52,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-11-18 09:23:52,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2018-11-18 09:23:52,467 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 29 states. [2018-11-18 09:23:52,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 09:23:52,692 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2018-11-18 09:23:52,693 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-11-18 09:23:52,693 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 55 [2018-11-18 09:23:52,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 09:23:52,694 INFO L225 Difference]: With dead ends: 43 [2018-11-18 09:23:52,694 INFO L226 Difference]: Without dead ends: 39 [2018-11-18 09:23:52,695 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=354, Invalid=1538, Unknown=0, NotChecked=0, Total=1892 [2018-11-18 09:23:52,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-11-18 09:23:52,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-11-18 09:23:52,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-11-18 09:23:52,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2018-11-18 09:23:52,700 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2018-11-18 09:23:52,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 09:23:52,700 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2018-11-18 09:23:52,700 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-11-18 09:23:52,700 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2018-11-18 09:23:52,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-11-18 09:23:52,701 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 09:23:52,701 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 09:23:52,702 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 09:23:52,702 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 09:23:52,704 INFO L82 PathProgramCache]: Analyzing trace with hash 1140618237, now seen corresponding path program 8 times [2018-11-18 09:23:52,704 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 09:23:52,704 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 09:23:52,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:23:52,705 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 09:23:52,706 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:23:52,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 09:23:52,784 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2018-11-18 09:23:52,784 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 09:23:52,785 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_33d5957e-6bd7-489f-84a5-c5c51d5d139e/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 09:23:52,791 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-18 09:23:52,802 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-18 09:23:52,802 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 09:23:52,805 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 09:23:52,824 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2018-11-18 09:23:52,839 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 09:23:52,839 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-11-18 09:23:52,840 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-18 09:23:52,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-18 09:23:52,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2018-11-18 09:23:52,840 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 13 states. [2018-11-18 09:23:52,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 09:23:52,916 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2018-11-18 09:23:52,916 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-18 09:23:52,916 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2018-11-18 09:23:52,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 09:23:52,917 INFO L225 Difference]: With dead ends: 46 [2018-11-18 09:23:52,917 INFO L226 Difference]: Without dead ends: 42 [2018-11-18 09:23:52,918 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2018-11-18 09:23:52,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-11-18 09:23:52,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-11-18 09:23:52,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-11-18 09:23:52,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2018-11-18 09:23:52,922 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2018-11-18 09:23:52,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 09:23:52,922 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2018-11-18 09:23:52,923 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-18 09:23:52,923 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2018-11-18 09:23:52,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-11-18 09:23:52,923 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 09:23:52,924 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 09:23:52,924 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 09:23:52,924 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 09:23:52,924 INFO L82 PathProgramCache]: Analyzing trace with hash -1749177617, now seen corresponding path program 9 times [2018-11-18 09:23:52,924 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 09:23:52,924 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 09:23:52,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:23:52,925 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 09:23:52,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:23:52,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 09:23:53,010 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-11-18 09:23:53,011 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 09:23:53,011 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_33d5957e-6bd7-489f-84a5-c5c51d5d139e/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 09:23:53,030 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 09:23:53,048 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-11-18 09:23:53,048 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 09:23:53,050 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 09:23:53,263 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-11-18 09:23:53,278 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 09:23:53,278 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 23] total 35 [2018-11-18 09:23:53,279 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-11-18 09:23:53,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-11-18 09:23:53,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=997, Unknown=0, NotChecked=0, Total=1190 [2018-11-18 09:23:53,279 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 35 states. [2018-11-18 09:23:53,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 09:23:53,558 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2018-11-18 09:23:53,558 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-11-18 09:23:53,559 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 67 [2018-11-18 09:23:53,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 09:23:53,559 INFO L225 Difference]: With dead ends: 49 [2018-11-18 09:23:53,559 INFO L226 Difference]: Without dead ends: 45 [2018-11-18 09:23:53,560 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=531, Invalid=2331, Unknown=0, NotChecked=0, Total=2862 [2018-11-18 09:23:53,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-11-18 09:23:53,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-11-18 09:23:53,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-11-18 09:23:53,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2018-11-18 09:23:53,563 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2018-11-18 09:23:53,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 09:23:53,564 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2018-11-18 09:23:53,564 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-11-18 09:23:53,564 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2018-11-18 09:23:53,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-11-18 09:23:53,564 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 09:23:53,564 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 09:23:53,565 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 09:23:53,565 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 09:23:53,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1580609155, now seen corresponding path program 10 times [2018-11-18 09:23:53,565 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 09:23:53,565 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 09:23:53,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:23:53,566 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 09:23:53,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:23:53,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 09:23:53,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 09:23:53,591 INFO L442 BasicCegarLoop]: Counterexample might be feasible [2018-11-18 09:23:53,610 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.11 09:23:53 BoogieIcfgContainer [2018-11-18 09:23:53,610 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-18 09:23:53,610 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-18 09:23:53,610 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-18 09:23:53,611 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-18 09:23:53,611 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 09:23:50" (3/4) ... [2018-11-18 09:23:53,612 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-11-18 09:23:53,646 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_33d5957e-6bd7-489f-84a5-c5c51d5d139e/bin-2019/uautomizer/witness.graphml [2018-11-18 09:23:53,646 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-18 09:23:53,646 INFO L168 Benchmark]: Toolchain (without parser) took 3564.21 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 180.4 MB). Free memory was 959.2 MB in the beginning and 1.0 GB in the end (delta: -48.0 MB). Peak memory consumption was 132.4 MB. Max. memory is 11.5 GB. [2018-11-18 09:23:53,648 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 09:23:53,648 INFO L168 Benchmark]: CACSL2BoogieTranslator took 154.58 ms. Allocated memory is still 1.0 GB. Free memory was 959.2 MB in the beginning and 948.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-18 09:23:53,648 INFO L168 Benchmark]: Boogie Preprocessor took 16.39 ms. Allocated memory is still 1.0 GB. Free memory is still 948.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 09:23:53,648 INFO L168 Benchmark]: RCFGBuilder took 158.20 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 139.5 MB). Free memory was 948.5 MB in the beginning and 1.1 GB in the end (delta: -181.7 MB). Peak memory consumption was 22.0 MB. Max. memory is 11.5 GB. [2018-11-18 09:23:53,649 INFO L168 Benchmark]: TraceAbstraction took 3196.39 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 40.9 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 118.3 MB). Peak memory consumption was 159.2 MB. Max. memory is 11.5 GB. [2018-11-18 09:23:53,649 INFO L168 Benchmark]: Witness Printer took 35.47 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 4.6 MB). Peak memory consumption was 4.6 MB. Max. memory is 11.5 GB. [2018-11-18 09:23:53,651 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 154.58 ms. Allocated memory is still 1.0 GB. Free memory was 959.2 MB in the beginning and 948.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 16.39 ms. Allocated memory is still 1.0 GB. Free memory is still 948.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 158.20 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 139.5 MB). Free memory was 948.5 MB in the beginning and 1.1 GB in the end (delta: -181.7 MB). Peak memory consumption was 22.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 3196.39 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 40.9 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 118.3 MB). Peak memory consumption was 159.2 MB. Max. memory is 11.5 GB. * Witness Printer took 35.47 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 4.6 MB). Peak memory consumption was 4.6 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L10] int input = 10; VAL [input=10] [L11] CALL, EXPR id(input) VAL [\old(x)=10] [L5] COND FALSE !(x==0) VAL [\old(x)=10, x=10] [L6] CALL, EXPR id(x-1) VAL [\old(x)=9] [L5] COND FALSE !(x==0) VAL [\old(x)=9, x=9] [L6] CALL, EXPR id(x-1) VAL [\old(x)=8] [L5] COND FALSE !(x==0) VAL [\old(x)=8, x=8] [L6] CALL, EXPR id(x-1) VAL [\old(x)=7] [L5] COND FALSE !(x==0) VAL [\old(x)=7, x=7] [L6] CALL, EXPR id(x-1) VAL [\old(x)=6] [L5] COND FALSE !(x==0) VAL [\old(x)=6, x=6] [L6] CALL, EXPR id(x-1) VAL [\old(x)=5] [L5] COND FALSE !(x==0) VAL [\old(x)=5, x=5] [L6] CALL, EXPR id(x-1) VAL [\old(x)=4] [L5] COND FALSE !(x==0) VAL [\old(x)=4, x=4] [L6] CALL, EXPR id(x-1) VAL [\old(x)=3] [L5] COND FALSE !(x==0) VAL [\old(x)=3, x=3] [L6] CALL, EXPR id(x-1) VAL [\old(x)=2] [L5] COND FALSE !(x==0) VAL [\old(x)=2, x=2] [L6] CALL, EXPR id(x-1) VAL [\old(x)=1] [L5] COND FALSE !(x==0) VAL [\old(x)=1, x=1] [L6] CALL, EXPR id(x-1) VAL [\old(x)=0] [L5] COND TRUE x==0 [L5] RET return 0; VAL [\old(x)=0, \result=0, x=0] [L6] EXPR id(x-1) VAL [\old(x)=1, id(x-1)=0, x=1] [L6] RET return id(x-1) + 1; [L6] EXPR id(x-1) VAL [\old(x)=2, id(x-1)=1, x=2] [L6] RET return id(x-1) + 1; [L6] EXPR id(x-1) VAL [\old(x)=3, id(x-1)=2, x=3] [L6] RET return id(x-1) + 1; [L6] EXPR id(x-1) VAL [\old(x)=4, id(x-1)=3, x=4] [L6] RET return id(x-1) + 1; [L6] EXPR id(x-1) VAL [\old(x)=5, id(x-1)=4, x=5] [L6] RET return id(x-1) + 1; [L6] EXPR id(x-1) VAL [\old(x)=6, id(x-1)=5, x=6] [L6] RET return id(x-1) + 1; [L6] EXPR id(x-1) VAL [\old(x)=7, id(x-1)=6, x=7] [L6] RET return id(x-1) + 1; [L6] EXPR id(x-1) VAL [\old(x)=8, id(x-1)=7, x=8] [L6] RET return id(x-1) + 1; [L6] EXPR id(x-1) VAL [\old(x)=9, id(x-1)=8, x=9] [L6] RET return id(x-1) + 1; [L6] EXPR id(x-1) VAL [\old(x)=10, id(x-1)=9, x=10] [L6] RET return id(x-1) + 1; [L11] EXPR id(input) VAL [id(input)=10, input=10] [L11] int result = id(input); [L12] COND TRUE result == 10 VAL [input=10, result=10] [L13] __VERIFIER_error() VAL [input=10, result=10] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. UNSAFE Result, 3.1s OverallTime, 11 OverallIterations, 11 TraceHistogramMax, 1.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 135 SDtfs, 111 SDslu, 1219 SDs, 0 SdLazy, 620 SolverSat, 39 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 585 GetRequests, 382 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1102 ImplicationChecksByTransitivity, 1.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=45occurred in iteration=10, 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, 10 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 860 NumberOfCodeBlocks, 855 NumberOfCodeBlocksAsserted, 45 NumberOfCheckSat, 768 ConstructedInterpolants, 0 QuantifiedInterpolants, 79920 SizeOfPredicates, 43 NumberOfNonLiveVariables, 898 ConjunctsInSsa, 126 ConjunctsInUnsatCore, 19 InterpolantComputations, 1 PerfectInterpolantSequences, 900/1800 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...