./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_10_true-unreach-call_true-termination.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 635dfa2a Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_2a7a8eb4-28fe-4ed0-bb49-066b61e4d916/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_2a7a8eb4-28fe-4ed0-bb49-066b61e4d916/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_2a7a8eb4-28fe-4ed0-bb49-066b61e4d916/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_2a7a8eb4-28fe-4ed0-bb49-066b61e4d916/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_10_true-unreach-call_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_2a7a8eb4-28fe-4ed0-bb49-066b61e4d916/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_2a7a8eb4-28fe-4ed0-bb49-066b61e4d916/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 dd317ac0ecdb37853dacea373914a521115465e0 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-635dfa2 [2018-12-01 14:34:10,793 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-01 14:34:10,795 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-01 14:34:10,801 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-01 14:34:10,802 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-01 14:34:10,803 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-01 14:34:10,803 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-01 14:34:10,805 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-01 14:34:10,806 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-01 14:34:10,807 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-01 14:34:10,807 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-01 14:34:10,808 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-01 14:34:10,809 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-01 14:34:10,809 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-01 14:34:10,810 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-01 14:34:10,811 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-01 14:34:10,811 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-01 14:34:10,813 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-01 14:34:10,814 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-01 14:34:10,816 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-01 14:34:10,816 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-01 14:34:10,817 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-01 14:34:10,819 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-01 14:34:10,819 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-01 14:34:10,820 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-01 14:34:10,820 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-01 14:34:10,821 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-01 14:34:10,822 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-01 14:34:10,822 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-01 14:34:10,823 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-01 14:34:10,823 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-01 14:34:10,824 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-01 14:34:10,824 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-01 14:34:10,824 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-01 14:34:10,825 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-01 14:34:10,825 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-01 14:34:10,826 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_2a7a8eb4-28fe-4ed0-bb49-066b61e4d916/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-12-01 14:34:10,836 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-01 14:34:10,836 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-01 14:34:10,837 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-01 14:34:10,837 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-01 14:34:10,838 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-01 14:34:10,838 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-01 14:34:10,838 INFO L133 SettingsManager]: * Use SBE=true [2018-12-01 14:34:10,838 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-01 14:34:10,838 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-01 14:34:10,838 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-01 14:34:10,838 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-01 14:34:10,838 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-01 14:34:10,839 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-01 14:34:10,839 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-01 14:34:10,839 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-01 14:34:10,839 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-01 14:34:10,839 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-01 14:34:10,839 INFO L133 SettingsManager]: * Use constant arrays=true [2018-12-01 14:34:10,839 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-01 14:34:10,839 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-01 14:34:10,839 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-01 14:34:10,840 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-01 14:34:10,840 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-01 14:34:10,840 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-01 14:34:10,840 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-01 14:34:10,840 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-01 14:34:10,840 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-01 14:34:10,840 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-12-01 14:34:10,840 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-01 14:34:10,840 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-01 14:34:10,840 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_2a7a8eb4-28fe-4ed0-bb49-066b61e4d916/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 -> dd317ac0ecdb37853dacea373914a521115465e0 [2018-12-01 14:34:10,862 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-01 14:34:10,870 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-01 14:34:10,873 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-01 14:34:10,874 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-01 14:34:10,875 INFO L276 PluginConnector]: CDTParser initialized [2018-12-01 14:34:10,875 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_2a7a8eb4-28fe-4ed0-bb49-066b61e4d916/bin-2019/uautomizer/../../sv-benchmarks/c/recursive-simple/fibo_10_true-unreach-call_true-termination.c [2018-12-01 14:34:10,921 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_2a7a8eb4-28fe-4ed0-bb49-066b61e4d916/bin-2019/uautomizer/data/643b071ae/6e6501052c49426d9058e9e967cd2c9f/FLAG13b7dbb52 [2018-12-01 14:34:11,335 INFO L307 CDTParser]: Found 1 translation units. [2018-12-01 14:34:11,335 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_2a7a8eb4-28fe-4ed0-bb49-066b61e4d916/sv-benchmarks/c/recursive-simple/fibo_10_true-unreach-call_true-termination.c [2018-12-01 14:34:11,338 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_2a7a8eb4-28fe-4ed0-bb49-066b61e4d916/bin-2019/uautomizer/data/643b071ae/6e6501052c49426d9058e9e967cd2c9f/FLAG13b7dbb52 [2018-12-01 14:34:11,349 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_2a7a8eb4-28fe-4ed0-bb49-066b61e4d916/bin-2019/uautomizer/data/643b071ae/6e6501052c49426d9058e9e967cd2c9f [2018-12-01 14:34:11,351 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-01 14:34:11,352 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-01 14:34:11,353 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-01 14:34:11,353 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-01 14:34:11,355 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-01 14:34:11,356 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 02:34:11" (1/1) ... [2018-12-01 14:34:11,357 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@489644d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 02:34:11, skipping insertion in model container [2018-12-01 14:34:11,357 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 02:34:11" (1/1) ... [2018-12-01 14:34:11,362 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-01 14:34:11,374 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-01 14:34:11,467 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-01 14:34:11,469 INFO L191 MainTranslator]: Completed pre-run [2018-12-01 14:34:11,477 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-01 14:34:11,485 INFO L195 MainTranslator]: Completed translation [2018-12-01 14:34:11,486 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 02:34:11 WrapperNode [2018-12-01 14:34:11,486 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-01 14:34:11,486 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-01 14:34:11,486 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-01 14:34:11,486 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-01 14:34:11,493 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 02:34:11" (1/1) ... [2018-12-01 14:34:11,497 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 02:34:11" (1/1) ... [2018-12-01 14:34:11,501 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-01 14:34:11,501 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-01 14:34:11,501 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-01 14:34:11,501 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-01 14:34:11,507 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 02:34:11" (1/1) ... [2018-12-01 14:34:11,507 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 02:34:11" (1/1) ... [2018-12-01 14:34:11,507 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 02:34:11" (1/1) ... [2018-12-01 14:34:11,507 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 02:34:11" (1/1) ... [2018-12-01 14:34:11,509 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 02:34:11" (1/1) ... [2018-12-01 14:34:11,510 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 02:34:11" (1/1) ... [2018-12-01 14:34:11,511 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 02:34:11" (1/1) ... [2018-12-01 14:34:11,512 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-01 14:34:11,512 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-01 14:34:11,512 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-01 14:34:11,512 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-01 14:34:11,512 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 02:34:11" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2a7a8eb4-28fe-4ed0-bb49-066b61e4d916/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 [2018-12-01 14:34:11,576 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-01 14:34:11,576 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-01 14:34:11,576 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-01 14:34:11,576 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-01 14:34:11,576 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-01 14:34:11,576 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-01 14:34:11,576 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2018-12-01 14:34:11,576 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2018-12-01 14:34:11,657 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-01 14:34:11,657 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-12-01 14:34:11,657 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 02:34:11 BoogieIcfgContainer [2018-12-01 14:34:11,657 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-01 14:34:11,658 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-01 14:34:11,658 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-01 14:34:11,659 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-01 14:34:11,660 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.12 02:34:11" (1/3) ... [2018-12-01 14:34:11,660 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54675e95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.12 02:34:11, skipping insertion in model container [2018-12-01 14:34:11,660 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 02:34:11" (2/3) ... [2018-12-01 14:34:11,660 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54675e95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.12 02:34:11, skipping insertion in model container [2018-12-01 14:34:11,660 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 02:34:11" (3/3) ... [2018-12-01 14:34:11,661 INFO L112 eAbstractionObserver]: Analyzing ICFG fibo_10_true-unreach-call_true-termination.c [2018-12-01 14:34:11,667 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-01 14:34:11,671 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-01 14:34:11,679 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-01 14:34:11,695 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-12-01 14:34:11,695 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-01 14:34:11,695 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-01 14:34:11,695 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-01 14:34:11,696 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-01 14:34:11,696 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-01 14:34:11,696 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-01 14:34:11,696 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-01 14:34:11,696 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-01 14:34:11,705 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2018-12-01 14:34:11,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-12-01 14:34:11,708 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 14:34:11,709 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 14:34:11,710 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 14:34:11,713 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 14:34:11,713 INFO L82 PathProgramCache]: Analyzing trace with hash 537028541, now seen corresponding path program 1 times [2018-12-01 14:34:11,714 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 14:34:11,714 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 14:34:11,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 14:34:11,741 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 14:34:11,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 14:34:11,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 14:34:11,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 14:34:11,805 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-01 14:34:11,806 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-01 14:34:11,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-01 14:34:11,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-01 14:34:11,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-01 14:34:11,817 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 5 states. [2018-12-01 14:34:11,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 14:34:11,874 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2018-12-01 14:34:11,875 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-01 14:34:11,875 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-12-01 14:34:11,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 14:34:11,881 INFO L225 Difference]: With dead ends: 35 [2018-12-01 14:34:11,881 INFO L226 Difference]: Without dead ends: 21 [2018-12-01 14:34:11,883 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-12-01 14:34:11,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-12-01 14:34:11,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-12-01 14:34:11,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-12-01 14:34:11,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2018-12-01 14:34:11,907 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 13 [2018-12-01 14:34:11,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 14:34:11,907 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2018-12-01 14:34:11,907 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-01 14:34:11,907 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2018-12-01 14:34:11,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-12-01 14:34:11,909 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 14:34:11,909 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 14:34:11,910 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 14:34:11,910 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 14:34:11,910 INFO L82 PathProgramCache]: Analyzing trace with hash 179123823, now seen corresponding path program 1 times [2018-12-01 14:34:11,910 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 14:34:11,910 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 14:34:11,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 14:34:11,911 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 14:34:11,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 14:34:11,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 14:34:11,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 14:34:11,935 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-01 14:34:11,935 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-01 14:34:11,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-01 14:34:11,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-01 14:34:11,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-01 14:34:11,936 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 5 states. [2018-12-01 14:34:11,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 14:34:11,971 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2018-12-01 14:34:11,971 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-01 14:34:11,971 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2018-12-01 14:34:11,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 14:34:11,972 INFO L225 Difference]: With dead ends: 27 [2018-12-01 14:34:11,972 INFO L226 Difference]: Without dead ends: 23 [2018-12-01 14:34:11,972 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-12-01 14:34:11,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-12-01 14:34:11,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2018-12-01 14:34:11,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-12-01 14:34:11,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2018-12-01 14:34:11,976 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 14 [2018-12-01 14:34:11,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 14:34:11,977 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2018-12-01 14:34:11,977 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-01 14:34:11,977 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2018-12-01 14:34:11,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-12-01 14:34:11,977 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 14:34:11,978 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 14:34:11,978 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 14:34:11,978 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 14:34:11,978 INFO L82 PathProgramCache]: Analyzing trace with hash 806022394, now seen corresponding path program 1 times [2018-12-01 14:34:11,978 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 14:34:11,978 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 14:34:11,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 14:34:11,979 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 14:34:11,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 14:34:11,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 14:34:12,022 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-12-01 14:34:12,022 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 14:34:12,022 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2a7a8eb4-28fe-4ed0-bb49-066b61e4d916/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 [2018-12-01 14:34:12,028 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 14:34:12,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 14:34:12,043 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 14:34:12,073 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-12-01 14:34:12,088 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 14:34:12,088 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2018-12-01 14:34:12,089 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-01 14:34:12,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-01 14:34:12,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2018-12-01 14:34:12,089 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 8 states. [2018-12-01 14:34:12,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 14:34:12,145 INFO L93 Difference]: Finished difference Result 38 states and 49 transitions. [2018-12-01 14:34:12,146 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-01 14:34:12,146 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2018-12-01 14:34:12,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 14:34:12,147 INFO L225 Difference]: With dead ends: 38 [2018-12-01 14:34:12,147 INFO L226 Difference]: Without dead ends: 23 [2018-12-01 14:34:12,148 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2018-12-01 14:34:12,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-12-01 14:34:12,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-12-01 14:34:12,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-12-01 14:34:12,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2018-12-01 14:34:12,153 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 26 [2018-12-01 14:34:12,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 14:34:12,153 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2018-12-01 14:34:12,153 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-01 14:34:12,153 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2018-12-01 14:34:12,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-12-01 14:34:12,154 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 14:34:12,154 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 14:34:12,154 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 14:34:12,155 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 14:34:12,155 INFO L82 PathProgramCache]: Analyzing trace with hash -983862936, now seen corresponding path program 1 times [2018-12-01 14:34:12,155 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 14:34:12,155 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 14:34:12,156 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 14:34:12,156 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 14:34:12,156 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 14:34:12,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 14:34:12,191 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-12-01 14:34:12,192 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 14:34:12,192 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2a7a8eb4-28fe-4ed0-bb49-066b61e4d916/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 [2018-12-01 14:34:12,203 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 14:34:12,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 14:34:12,211 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 14:34:12,217 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-12-01 14:34:12,231 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 14:34:12,231 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-12-01 14:34:12,231 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-01 14:34:12,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-01 14:34:12,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-12-01 14:34:12,232 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 6 states. [2018-12-01 14:34:12,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 14:34:12,272 INFO L93 Difference]: Finished difference Result 32 states and 41 transitions. [2018-12-01 14:34:12,272 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-01 14:34:12,272 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2018-12-01 14:34:12,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 14:34:12,273 INFO L225 Difference]: With dead ends: 32 [2018-12-01 14:34:12,273 INFO L226 Difference]: Without dead ends: 28 [2018-12-01 14:34:12,273 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-12-01 14:34:12,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-12-01 14:34:12,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-12-01 14:34:12,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-12-01 14:34:12,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2018-12-01 14:34:12,277 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 27 [2018-12-01 14:34:12,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 14:34:12,277 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2018-12-01 14:34:12,277 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-01 14:34:12,277 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2018-12-01 14:34:12,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-12-01 14:34:12,278 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 14:34:12,278 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 14:34:12,279 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 14:34:12,279 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 14:34:12,279 INFO L82 PathProgramCache]: Analyzing trace with hash 146085807, now seen corresponding path program 2 times [2018-12-01 14:34:12,279 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 14:34:12,279 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 14:34:12,280 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 14:34:12,280 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 14:34:12,280 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 14:34:12,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 14:34:12,306 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-12-01 14:34:12,306 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 14:34:12,306 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2a7a8eb4-28fe-4ed0-bb49-066b61e4d916/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 [2018-12-01 14:34:12,318 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-01 14:34:12,328 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-01 14:34:12,328 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 14:34:12,330 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 14:34:12,353 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-12-01 14:34:12,368 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 14:34:12,368 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 8 [2018-12-01 14:34:12,368 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-01 14:34:12,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-01 14:34:12,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-12-01 14:34:12,369 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand 8 states. [2018-12-01 14:34:12,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 14:34:12,424 INFO L93 Difference]: Finished difference Result 40 states and 60 transitions. [2018-12-01 14:34:12,424 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-01 14:34:12,424 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2018-12-01 14:34:12,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 14:34:12,426 INFO L225 Difference]: With dead ends: 40 [2018-12-01 14:34:12,426 INFO L226 Difference]: Without dead ends: 36 [2018-12-01 14:34:12,426 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2018-12-01 14:34:12,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-12-01 14:34:12,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2018-12-01 14:34:12,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-12-01 14:34:12,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 49 transitions. [2018-12-01 14:34:12,434 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 49 transitions. Word has length 40 [2018-12-01 14:34:12,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 14:34:12,434 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 49 transitions. [2018-12-01 14:34:12,434 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-01 14:34:12,434 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 49 transitions. [2018-12-01 14:34:12,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-12-01 14:34:12,437 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 14:34:12,437 INFO L402 BasicCegarLoop]: trace histogram [13, 13, 11, 6, 6, 6, 6, 6, 6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 14:34:12,437 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 14:34:12,437 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 14:34:12,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1474757101, now seen corresponding path program 3 times [2018-12-01 14:34:12,437 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 14:34:12,438 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 14:34:12,438 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 14:34:12,438 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 14:34:12,439 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 14:34:12,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 14:34:12,558 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 176 proven. 28 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2018-12-01 14:34:12,558 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 14:34:12,558 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2a7a8eb4-28fe-4ed0-bb49-066b61e4d916/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 [2018-12-01 14:34:12,564 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-01 14:34:12,580 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-12-01 14:34:12,580 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 14:34:12,583 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 14:34:12,604 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 174 proven. 17 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2018-12-01 14:34:12,618 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 14:34:12,618 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 12 [2018-12-01 14:34:12,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-01 14:34:12,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-01 14:34:12,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2018-12-01 14:34:12,619 INFO L87 Difference]: Start difference. First operand 33 states and 49 transitions. Second operand 12 states. [2018-12-01 14:34:12,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 14:34:12,781 INFO L93 Difference]: Finished difference Result 76 states and 143 transitions. [2018-12-01 14:34:12,781 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-01 14:34:12,781 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 96 [2018-12-01 14:34:12,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 14:34:12,783 INFO L225 Difference]: With dead ends: 76 [2018-12-01 14:34:12,783 INFO L226 Difference]: Without dead ends: 49 [2018-12-01 14:34:12,783 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2018-12-01 14:34:12,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-12-01 14:34:12,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2018-12-01 14:34:12,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-12-01 14:34:12,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 63 transitions. [2018-12-01 14:34:12,789 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 63 transitions. Word has length 96 [2018-12-01 14:34:12,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 14:34:12,789 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 63 transitions. [2018-12-01 14:34:12,789 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-01 14:34:12,789 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 63 transitions. [2018-12-01 14:34:12,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-12-01 14:34:12,790 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 14:34:12,790 INFO L402 BasicCegarLoop]: trace histogram [11, 11, 9, 5, 5, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 14:34:12,790 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 14:34:12,790 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 14:34:12,791 INFO L82 PathProgramCache]: Analyzing trace with hash -1986920854, now seen corresponding path program 4 times [2018-12-01 14:34:12,791 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 14:34:12,791 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 14:34:12,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 14:34:12,791 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 14:34:12,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 14:34:12,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 14:34:12,852 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 41 proven. 82 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2018-12-01 14:34:12,852 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 14:34:12,852 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2a7a8eb4-28fe-4ed0-bb49-066b61e4d916/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 [2018-12-01 14:34:12,863 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-01 14:34:12,875 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-01 14:34:12,876 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 14:34:12,878 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 14:34:12,894 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 22 proven. 127 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2018-12-01 14:34:12,908 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 14:34:12,908 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 8 [2018-12-01 14:34:12,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-01 14:34:12,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-01 14:34:12,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-12-01 14:34:12,909 INFO L87 Difference]: Start difference. First operand 43 states and 63 transitions. Second operand 8 states. [2018-12-01 14:34:12,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 14:34:12,968 INFO L93 Difference]: Finished difference Result 52 states and 81 transitions. [2018-12-01 14:34:12,968 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-01 14:34:12,968 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 82 [2018-12-01 14:34:12,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 14:34:12,969 INFO L225 Difference]: With dead ends: 52 [2018-12-01 14:34:12,969 INFO L226 Difference]: Without dead ends: 48 [2018-12-01 14:34:12,970 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2018-12-01 14:34:12,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-12-01 14:34:12,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-12-01 14:34:12,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-12-01 14:34:12,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 77 transitions. [2018-12-01 14:34:12,974 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 77 transitions. Word has length 82 [2018-12-01 14:34:12,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 14:34:12,975 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 77 transitions. [2018-12-01 14:34:12,975 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-01 14:34:12,975 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 77 transitions. [2018-12-01 14:34:12,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-12-01 14:34:12,976 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 14:34:12,976 INFO L402 BasicCegarLoop]: trace histogram [17, 17, 16, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 14:34:12,976 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 14:34:12,976 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 14:34:12,976 INFO L82 PathProgramCache]: Analyzing trace with hash 1659236261, now seen corresponding path program 5 times [2018-12-01 14:34:12,976 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 14:34:12,976 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 14:34:12,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 14:34:12,977 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 14:34:12,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 14:34:12,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 14:34:13,028 INFO L134 CoverageAnalysis]: Checked inductivity of 776 backedges. 129 proven. 106 refuted. 0 times theorem prover too weak. 541 trivial. 0 not checked. [2018-12-01 14:34:13,028 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 14:34:13,028 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2a7a8eb4-28fe-4ed0-bb49-066b61e4d916/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 [2018-12-01 14:34:13,034 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-12-01 14:34:13,047 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-12-01 14:34:13,048 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 14:34:13,050 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 14:34:13,082 INFO L134 CoverageAnalysis]: Checked inductivity of 776 backedges. 463 proven. 77 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2018-12-01 14:34:13,104 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 14:34:13,104 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 11 [2018-12-01 14:34:13,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-01 14:34:13,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-01 14:34:13,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2018-12-01 14:34:13,105 INFO L87 Difference]: Start difference. First operand 48 states and 77 transitions. Second operand 11 states. [2018-12-01 14:34:13,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 14:34:13,247 INFO L93 Difference]: Finished difference Result 94 states and 162 transitions. [2018-12-01 14:34:13,247 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-12-01 14:34:13,247 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 125 [2018-12-01 14:34:13,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 14:34:13,248 INFO L225 Difference]: With dead ends: 94 [2018-12-01 14:34:13,248 INFO L226 Difference]: Without dead ends: 52 [2018-12-01 14:34:13,249 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=118, Invalid=302, Unknown=0, NotChecked=0, Total=420 [2018-12-01 14:34:13,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-12-01 14:34:13,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-12-01 14:34:13,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-12-01 14:34:13,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2018-12-01 14:34:13,252 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 125 [2018-12-01 14:34:13,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 14:34:13,253 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2018-12-01 14:34:13,253 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-01 14:34:13,253 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2018-12-01 14:34:13,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-12-01 14:34:13,254 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 14:34:13,254 INFO L402 BasicCegarLoop]: trace histogram [19, 19, 15, 9, 9, 9, 9, 9, 9, 9, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 14:34:13,254 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 14:34:13,254 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 14:34:13,254 INFO L82 PathProgramCache]: Analyzing trace with hash -1040445716, now seen corresponding path program 6 times [2018-12-01 14:34:13,254 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 14:34:13,254 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 14:34:13,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 14:34:13,255 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 14:34:13,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 14:34:13,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 14:34:13,304 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 76 proven. 241 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2018-12-01 14:34:13,304 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 14:34:13,304 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2a7a8eb4-28fe-4ed0-bb49-066b61e4d916/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 [2018-12-01 14:34:13,310 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-12-01 14:34:13,331 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2018-12-01 14:34:13,331 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 14:34:13,334 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 14:34:13,358 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 52 proven. 326 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2018-12-01 14:34:13,372 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 14:34:13,372 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 9 [2018-12-01 14:34:13,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-01 14:34:13,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-01 14:34:13,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-12-01 14:34:13,372 INFO L87 Difference]: Start difference. First operand 52 states and 62 transitions. Second operand 9 states. [2018-12-01 14:34:13,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 14:34:13,452 INFO L93 Difference]: Finished difference Result 61 states and 77 transitions. [2018-12-01 14:34:13,453 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-01 14:34:13,453 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 136 [2018-12-01 14:34:13,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 14:34:13,453 INFO L225 Difference]: With dead ends: 61 [2018-12-01 14:34:13,453 INFO L226 Difference]: Without dead ends: 57 [2018-12-01 14:34:13,454 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2018-12-01 14:34:13,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-12-01 14:34:13,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-12-01 14:34:13,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-12-01 14:34:13,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 73 transitions. [2018-12-01 14:34:13,459 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 73 transitions. Word has length 136 [2018-12-01 14:34:13,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 14:34:13,459 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 73 transitions. [2018-12-01 14:34:13,459 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-01 14:34:13,459 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 73 transitions. [2018-12-01 14:34:13,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2018-12-01 14:34:13,461 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 14:34:13,462 INFO L402 BasicCegarLoop]: trace histogram [29, 29, 23, 14, 14, 14, 14, 14, 14, 14, 9, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 14:34:13,462 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 14:34:13,462 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 14:34:13,462 INFO L82 PathProgramCache]: Analyzing trace with hash -509498553, now seen corresponding path program 7 times [2018-12-01 14:34:13,462 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 14:34:13,462 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 14:34:13,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 14:34:13,463 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 14:34:13,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 14:34:13,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 14:34:13,597 INFO L134 CoverageAnalysis]: Checked inductivity of 2241 backedges. 669 proven. 122 refuted. 0 times theorem prover too weak. 1450 trivial. 0 not checked. [2018-12-01 14:34:13,597 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 14:34:13,598 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2a7a8eb4-28fe-4ed0-bb49-066b61e4d916/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 [2018-12-01 14:34:13,604 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 14:34:13,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 14:34:13,639 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 14:34:13,724 INFO L134 CoverageAnalysis]: Checked inductivity of 2241 backedges. 103 proven. 653 refuted. 0 times theorem prover too weak. 1485 trivial. 0 not checked. [2018-12-01 14:34:13,739 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 14:34:13,739 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 18 [2018-12-01 14:34:13,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-12-01 14:34:13,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-12-01 14:34:13,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2018-12-01 14:34:13,740 INFO L87 Difference]: Start difference. First operand 57 states and 73 transitions. Second operand 18 states. [2018-12-01 14:34:14,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 14:34:14,116 INFO L93 Difference]: Finished difference Result 142 states and 238 transitions. [2018-12-01 14:34:14,116 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-12-01 14:34:14,116 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 204 [2018-12-01 14:34:14,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 14:34:14,118 INFO L225 Difference]: With dead ends: 142 [2018-12-01 14:34:14,118 INFO L226 Difference]: Without dead ends: 93 [2018-12-01 14:34:14,120 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=343, Invalid=1139, Unknown=0, NotChecked=0, Total=1482 [2018-12-01 14:34:14,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-12-01 14:34:14,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 83. [2018-12-01 14:34:14,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-12-01 14:34:14,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 110 transitions. [2018-12-01 14:34:14,129 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 110 transitions. Word has length 204 [2018-12-01 14:34:14,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 14:34:14,129 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 110 transitions. [2018-12-01 14:34:14,129 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-12-01 14:34:14,129 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 110 transitions. [2018-12-01 14:34:14,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2018-12-01 14:34:14,132 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 14:34:14,132 INFO L402 BasicCegarLoop]: trace histogram [41, 41, 33, 20, 20, 20, 20, 20, 20, 20, 13, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 14:34:14,133 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 14:34:14,133 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 14:34:14,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1425621089, now seen corresponding path program 8 times [2018-12-01 14:34:14,133 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 14:34:14,133 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 14:34:14,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 14:34:14,134 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 14:34:14,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 14:34:14,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 14:34:14,261 INFO L134 CoverageAnalysis]: Checked inductivity of 4568 backedges. 702 proven. 270 refuted. 0 times theorem prover too weak. 3596 trivial. 0 not checked. [2018-12-01 14:34:14,261 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 14:34:14,261 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2a7a8eb4-28fe-4ed0-bb49-066b61e4d916/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 [2018-12-01 14:34:14,268 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-01 14:34:14,303 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-01 14:34:14,304 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 14:34:14,307 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 14:34:14,356 INFO L134 CoverageAnalysis]: Checked inductivity of 4568 backedges. 189 proven. 1130 refuted. 0 times theorem prover too weak. 3249 trivial. 0 not checked. [2018-12-01 14:34:14,371 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 14:34:14,371 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 11 [2018-12-01 14:34:14,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-01 14:34:14,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-01 14:34:14,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2018-12-01 14:34:14,372 INFO L87 Difference]: Start difference. First operand 83 states and 110 transitions. Second operand 11 states. [2018-12-01 14:34:14,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 14:34:14,446 INFO L93 Difference]: Finished difference Result 92 states and 128 transitions. [2018-12-01 14:34:14,446 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-01 14:34:14,446 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 286 [2018-12-01 14:34:14,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 14:34:14,447 INFO L225 Difference]: With dead ends: 92 [2018-12-01 14:34:14,447 INFO L226 Difference]: Without dead ends: 88 [2018-12-01 14:34:14,447 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 289 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2018-12-01 14:34:14,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-12-01 14:34:14,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-12-01 14:34:14,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-12-01 14:34:14,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 123 transitions. [2018-12-01 14:34:14,453 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 123 transitions. Word has length 286 [2018-12-01 14:34:14,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 14:34:14,453 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 123 transitions. [2018-12-01 14:34:14,453 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-01 14:34:14,454 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 123 transitions. [2018-12-01 14:34:14,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 464 [2018-12-01 14:34:14,455 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 14:34:14,455 INFO L402 BasicCegarLoop]: trace histogram [67, 67, 54, 33, 33, 33, 33, 33, 33, 33, 21, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 14:34:14,455 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 14:34:14,455 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 14:34:14,455 INFO L82 PathProgramCache]: Analyzing trace with hash -229001048, now seen corresponding path program 9 times [2018-12-01 14:34:14,455 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 14:34:14,455 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 14:34:14,456 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 14:34:14,456 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 14:34:14,456 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 14:34:14,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 14:34:14,601 INFO L134 CoverageAnalysis]: Checked inductivity of 12387 backedges. 1412 proven. 592 refuted. 0 times theorem prover too weak. 10383 trivial. 0 not checked. [2018-12-01 14:34:14,601 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 14:34:14,601 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2a7a8eb4-28fe-4ed0-bb49-066b61e4d916/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 [2018-12-01 14:34:14,608 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-01 14:34:14,659 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2018-12-01 14:34:14,659 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 14:34:14,663 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 14:34:14,766 INFO L134 CoverageAnalysis]: Checked inductivity of 12387 backedges. 1415 proven. 256 refuted. 0 times theorem prover too weak. 10716 trivial. 0 not checked. [2018-12-01 14:34:14,781 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 14:34:14,781 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2018-12-01 14:34:14,782 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-01 14:34:14,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-01 14:34:14,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2018-12-01 14:34:14,782 INFO L87 Difference]: Start difference. First operand 88 states and 123 transitions. Second operand 11 states. [2018-12-01 14:34:14,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 14:34:14,884 INFO L93 Difference]: Finished difference Result 95 states and 134 transitions. [2018-12-01 14:34:14,884 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-01 14:34:14,884 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 463 [2018-12-01 14:34:14,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 14:34:14,885 INFO L225 Difference]: With dead ends: 95 [2018-12-01 14:34:14,886 INFO L226 Difference]: Without dead ends: 91 [2018-12-01 14:34:14,886 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 484 GetRequests, 468 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2018-12-01 14:34:14,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-12-01 14:34:14,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 88. [2018-12-01 14:34:14,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-12-01 14:34:14,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 123 transitions. [2018-12-01 14:34:14,891 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 123 transitions. Word has length 463 [2018-12-01 14:34:14,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 14:34:14,892 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 123 transitions. [2018-12-01 14:34:14,892 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-01 14:34:14,892 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 123 transitions. [2018-12-01 14:34:14,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 573 [2018-12-01 14:34:14,893 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 14:34:14,893 INFO L402 BasicCegarLoop]: trace histogram [83, 83, 67, 41, 41, 41, 41, 41, 41, 41, 26, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 14:34:14,894 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 14:34:14,894 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 14:34:14,894 INFO L82 PathProgramCache]: Analyzing trace with hash 1932846124, now seen corresponding path program 10 times [2018-12-01 14:34:14,894 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 14:34:14,894 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 14:34:14,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 14:34:14,894 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 14:34:14,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 14:34:14,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 14:34:15,054 INFO L134 CoverageAnalysis]: Checked inductivity of 19103 backedges. 440 proven. 2503 refuted. 0 times theorem prover too weak. 16160 trivial. 0 not checked. [2018-12-01 14:34:15,054 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 14:34:15,054 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2a7a8eb4-28fe-4ed0-bb49-066b61e4d916/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 [2018-12-01 14:34:15,060 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-01 14:34:15,122 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-01 14:34:15,122 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 14:34:15,128 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 14:34:15,255 INFO L134 CoverageAnalysis]: Checked inductivity of 19103 backedges. 401 proven. 2942 refuted. 0 times theorem prover too weak. 15760 trivial. 0 not checked. [2018-12-01 14:34:15,270 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 14:34:15,270 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2018-12-01 14:34:15,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-01 14:34:15,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-01 14:34:15,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2018-12-01 14:34:15,271 INFO L87 Difference]: Start difference. First operand 88 states and 123 transitions. Second operand 12 states. [2018-12-01 14:34:15,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 14:34:15,381 INFO L93 Difference]: Finished difference Result 100 states and 151 transitions. [2018-12-01 14:34:15,381 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-01 14:34:15,381 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 572 [2018-12-01 14:34:15,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 14:34:15,382 INFO L225 Difference]: With dead ends: 100 [2018-12-01 14:34:15,382 INFO L226 Difference]: Without dead ends: 96 [2018-12-01 14:34:15,383 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 596 GetRequests, 578 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2018-12-01 14:34:15,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-12-01 14:34:15,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 93. [2018-12-01 14:34:15,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-12-01 14:34:15,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 138 transitions. [2018-12-01 14:34:15,388 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 138 transitions. Word has length 572 [2018-12-01 14:34:15,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 14:34:15,388 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 138 transitions. [2018-12-01 14:34:15,388 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-01 14:34:15,388 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 138 transitions. [2018-12-01 14:34:15,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 927 [2018-12-01 14:34:15,392 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 14:34:15,392 INFO L402 BasicCegarLoop]: trace histogram [135, 135, 109, 67, 67, 67, 67, 67, 67, 67, 42, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 14:34:15,392 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 14:34:15,392 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 14:34:15,392 INFO L82 PathProgramCache]: Analyzing trace with hash -589175644, now seen corresponding path program 11 times [2018-12-01 14:34:15,392 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 14:34:15,392 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 14:34:15,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 14:34:15,393 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 14:34:15,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 14:34:15,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 14:34:15,736 INFO L134 CoverageAnalysis]: Checked inductivity of 50910 backedges. 768 proven. 4887 refuted. 0 times theorem prover too weak. 45255 trivial. 0 not checked. [2018-12-01 14:34:15,737 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 14:34:15,737 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2a7a8eb4-28fe-4ed0-bb49-066b61e4d916/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 [2018-12-01 14:34:15,742 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-12-01 14:34:16,095 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 112 check-sat command(s) [2018-12-01 14:34:16,095 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 14:34:16,105 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 14:34:16,455 INFO L134 CoverageAnalysis]: Checked inductivity of 50910 backedges. 5099 proven. 5514 refuted. 0 times theorem prover too weak. 40297 trivial. 0 not checked. [2018-12-01 14:34:16,481 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 14:34:16,481 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 20] total 23 [2018-12-01 14:34:16,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-12-01 14:34:16,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-12-01 14:34:16,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2018-12-01 14:34:16,482 INFO L87 Difference]: Start difference. First operand 93 states and 138 transitions. Second operand 23 states. [2018-12-01 14:34:17,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 14:34:17,183 INFO L93 Difference]: Finished difference Result 257 states and 561 transitions. [2018-12-01 14:34:17,183 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-12-01 14:34:17,183 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 926 [2018-12-01 14:34:17,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 14:34:17,185 INFO L225 Difference]: With dead ends: 257 [2018-12-01 14:34:17,185 INFO L226 Difference]: Without dead ends: 174 [2018-12-01 14:34:17,186 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 980 GetRequests, 923 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 848 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=687, Invalid=2735, Unknown=0, NotChecked=0, Total=3422 [2018-12-01 14:34:17,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2018-12-01 14:34:17,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 142. [2018-12-01 14:34:17,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2018-12-01 14:34:17,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 212 transitions. [2018-12-01 14:34:17,194 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 212 transitions. Word has length 926 [2018-12-01 14:34:17,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 14:34:17,194 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 212 transitions. [2018-12-01 14:34:17,194 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-12-01 14:34:17,194 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 212 transitions. [2018-12-01 14:34:17,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1390 [2018-12-01 14:34:17,201 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 14:34:17,201 INFO L402 BasicCegarLoop]: trace histogram [203, 203, 164, 101, 101, 101, 101, 101, 101, 101, 63, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 14:34:17,201 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 14:34:17,201 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 14:34:17,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1350010174, now seen corresponding path program 12 times [2018-12-01 14:34:17,201 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 14:34:17,202 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 14:34:17,202 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 14:34:17,202 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 14:34:17,202 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 14:34:17,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 14:34:17,851 INFO L134 CoverageAnalysis]: Checked inductivity of 115578 backedges. 6431 proven. 3718 refuted. 0 times theorem prover too weak. 105429 trivial. 0 not checked. [2018-12-01 14:34:17,851 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 14:34:17,852 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2a7a8eb4-28fe-4ed0-bb49-066b61e4d916/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 [2018-12-01 14:34:17,857 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-12-01 14:34:18,500 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 146 check-sat command(s) [2018-12-01 14:34:18,501 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 14:34:18,513 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 14:34:19,045 INFO L134 CoverageAnalysis]: Checked inductivity of 115578 backedges. 9568 proven. 1014 refuted. 0 times theorem prover too weak. 104996 trivial. 0 not checked. [2018-12-01 14:34:19,061 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 14:34:19,062 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 23 [2018-12-01 14:34:19,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-12-01 14:34:19,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-12-01 14:34:19,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2018-12-01 14:34:19,063 INFO L87 Difference]: Start difference. First operand 142 states and 212 transitions. Second operand 23 states. [2018-12-01 14:34:19,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 14:34:19,555 INFO L93 Difference]: Finished difference Result 332 states and 635 transitions. [2018-12-01 14:34:19,555 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-12-01 14:34:19,555 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 1389 [2018-12-01 14:34:19,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 14:34:19,557 INFO L225 Difference]: With dead ends: 332 [2018-12-01 14:34:19,557 INFO L226 Difference]: Without dead ends: 175 [2018-12-01 14:34:19,559 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1437 GetRequests, 1390 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=514, Invalid=1838, Unknown=0, NotChecked=0, Total=2352 [2018-12-01 14:34:19,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2018-12-01 14:34:19,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 139. [2018-12-01 14:34:19,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-12-01 14:34:19,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 192 transitions. [2018-12-01 14:34:19,565 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 192 transitions. Word has length 1389 [2018-12-01 14:34:19,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 14:34:19,566 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 192 transitions. [2018-12-01 14:34:19,566 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-12-01 14:34:19,566 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 192 transitions. [2018-12-01 14:34:19,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1213 [2018-12-01 14:34:19,571 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 14:34:19,572 INFO L402 BasicCegarLoop]: trace histogram [177, 177, 143, 88, 88, 88, 88, 88, 88, 88, 55, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 14:34:19,572 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 14:34:19,572 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 14:34:19,572 INFO L82 PathProgramCache]: Analyzing trace with hash 452920407, now seen corresponding path program 13 times [2018-12-01 14:34:19,572 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 14:34:19,572 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 14:34:19,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 14:34:19,573 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 14:34:19,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 14:34:19,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 14:34:21,015 INFO L134 CoverageAnalysis]: Checked inductivity of 87769 backedges. 0 proven. 28921 refuted. 0 times theorem prover too weak. 58848 trivial. 0 not checked. [2018-12-01 14:34:21,015 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 14:34:21,015 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2a7a8eb4-28fe-4ed0-bb49-066b61e4d916/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 [2018-12-01 14:34:21,021 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 14:34:21,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 14:34:21,226 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 14:34:22,569 INFO L134 CoverageAnalysis]: Checked inductivity of 87769 backedges. 0 proven. 28921 refuted. 0 times theorem prover too weak. 58848 trivial. 0 not checked. [2018-12-01 14:34:22,584 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 14:34:22,585 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 40 [2018-12-01 14:34:22,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-12-01 14:34:22,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-12-01 14:34:22,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1465, Unknown=0, NotChecked=0, Total=1560 [2018-12-01 14:34:22,586 INFO L87 Difference]: Start difference. First operand 139 states and 192 transitions. Second operand 40 states. [2018-12-01 14:34:22,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 14:34:22,926 INFO L93 Difference]: Finished difference Result 152 states and 219 transitions. [2018-12-01 14:34:22,926 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-12-01 14:34:22,926 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 1212 [2018-12-01 14:34:22,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 14:34:22,928 INFO L225 Difference]: With dead ends: 152 [2018-12-01 14:34:22,928 INFO L226 Difference]: Without dead ends: 148 [2018-12-01 14:34:22,929 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1568 GetRequests, 1440 SyntacticMatches, 90 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=95, Invalid=1465, Unknown=0, NotChecked=0, Total=1560 [2018-12-01 14:34:22,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2018-12-01 14:34:22,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 144. [2018-12-01 14:34:22,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2018-12-01 14:34:22,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 199 transitions. [2018-12-01 14:34:22,939 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 199 transitions. Word has length 1212 [2018-12-01 14:34:22,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 14:34:22,940 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 199 transitions. [2018-12-01 14:34:22,940 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-12-01 14:34:22,940 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 199 transitions. [2018-12-01 14:34:22,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1676 [2018-12-01 14:34:22,955 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 14:34:22,955 INFO L402 BasicCegarLoop]: trace histogram [245, 245, 198, 122, 122, 122, 122, 122, 122, 122, 76, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 14:34:22,955 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 14:34:22,956 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 14:34:22,956 INFO L82 PathProgramCache]: Analyzing trace with hash -1947361163, now seen corresponding path program 14 times [2018-12-01 14:34:22,956 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 14:34:22,956 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 14:34:22,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 14:34:22,957 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 14:34:22,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 14:34:23,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 14:34:23,882 INFO L134 CoverageAnalysis]: Checked inductivity of 168587 backedges. 2138 proven. 11524 refuted. 0 times theorem prover too weak. 154925 trivial. 0 not checked. [2018-12-01 14:34:23,883 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 14:34:23,883 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2a7a8eb4-28fe-4ed0-bb49-066b61e4d916/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 [2018-12-01 14:34:23,889 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-01 14:34:24,097 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-01 14:34:24,098 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 14:34:24,112 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 14:34:24,831 INFO L134 CoverageAnalysis]: Checked inductivity of 168587 backedges. 2156 proven. 11497 refuted. 0 times theorem prover too weak. 154934 trivial. 0 not checked. [2018-12-01 14:34:24,847 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 14:34:24,848 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 18 [2018-12-01 14:34:24,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-12-01 14:34:24,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-12-01 14:34:24,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2018-12-01 14:34:24,849 INFO L87 Difference]: Start difference. First operand 144 states and 199 transitions. Second operand 18 states. [2018-12-01 14:34:24,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 14:34:24,972 INFO L93 Difference]: Finished difference Result 147 states and 208 transitions. [2018-12-01 14:34:24,972 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-12-01 14:34:24,972 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 1675 [2018-12-01 14:34:24,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 14:34:24,973 INFO L225 Difference]: With dead ends: 147 [2018-12-01 14:34:24,973 INFO L226 Difference]: Without dead ends: 0 [2018-12-01 14:34:24,974 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1708 GetRequests, 1682 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=241, Invalid=461, Unknown=0, NotChecked=0, Total=702 [2018-12-01 14:34:24,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-12-01 14:34:24,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-12-01 14:34:24,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-12-01 14:34:24,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-12-01 14:34:24,974 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 1675 [2018-12-01 14:34:24,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 14:34:24,974 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-01 14:34:24,974 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-12-01 14:34:24,974 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-12-01 14:34:24,974 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-01 14:34:24,977 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-12-01 14:34:25,664 WARN L180 SmtUtils]: Spent 521.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 67 [2018-12-01 14:34:25,810 WARN L180 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 8 [2018-12-01 14:34:25,811 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-12-01 14:34:25,811 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-12-01 14:34:25,812 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-12-01 14:34:25,812 INFO L451 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-12-01 14:34:25,812 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-12-01 14:34:25,812 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-12-01 14:34:25,812 INFO L451 ceAbstractionStarter]: At program point mainENTRY(lines 23 30) the Hoare annotation is: true [2018-12-01 14:34:25,812 INFO L448 ceAbstractionStarter]: For program point L27(line 27) no Hoare annotation was computed. [2018-12-01 14:34:25,812 INFO L448 ceAbstractionStarter]: For program point L26(lines 26 28) no Hoare annotation was computed. [2018-12-01 14:34:25,812 INFO L444 ceAbstractionStarter]: At program point L25(line 25) the Hoare annotation is: (and (<= main_~x~0 10) (<= 10 main_~x~0)) [2018-12-01 14:34:25,812 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 23 30) no Hoare annotation was computed. [2018-12-01 14:34:25,812 INFO L448 ceAbstractionStarter]: For program point L25-1(line 25) no Hoare annotation was computed. [2018-12-01 14:34:25,812 INFO L448 ceAbstractionStarter]: For program point L26-2(lines 26 28) no Hoare annotation was computed. [2018-12-01 14:34:25,812 INFO L448 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 27) no Hoare annotation was computed. [2018-12-01 14:34:25,812 INFO L448 ceAbstractionStarter]: For program point mainFINAL(lines 23 30) no Hoare annotation was computed. [2018-12-01 14:34:25,813 INFO L448 ceAbstractionStarter]: For program point fiboEXIT(lines 5 13) no Hoare annotation was computed. [2018-12-01 14:34:25,813 INFO L448 ceAbstractionStarter]: For program point fiboFINAL(lines 5 13) no Hoare annotation was computed. [2018-12-01 14:34:25,813 INFO L444 ceAbstractionStarter]: At program point L11(line 11) the Hoare annotation is: (and (<= fibo_~n |fibo_#in~n|) (<= |fibo_#in~n| fibo_~n) (< 1 fibo_~n)) [2018-12-01 14:34:25,813 INFO L448 ceAbstractionStarter]: For program point L11-1(line 11) no Hoare annotation was computed. [2018-12-01 14:34:25,813 INFO L444 ceAbstractionStarter]: At program point L11-2(line 11) the Hoare annotation is: (let ((.cse2 (<= fibo_~n |fibo_#in~n|)) (.cse3 (<= 5 fibo_~n))) (let ((.cse0 (and .cse2 (<= 3 |fibo_#t~ret0|) (<= |fibo_#t~ret0| 3) (<= |fibo_#in~n| 5) .cse3)) (.cse1 (and (<= |fibo_#t~ret0| 5) (<= |fibo_#in~n| 6) .cse2 (<= 5 |fibo_#t~ret0|) (<= 6 |fibo_#in~n|)))) (and (or (and (<= 34 |fibo_#t~ret0|) (<= |fibo_#t~ret0| 34)) (<= fibo_~n 9) (<= 11 |fibo_#in~n|)) (or .cse0 .cse1 (and (<= 7 |fibo_#in~n|) .cse2) (< |fibo_#in~n| 5)) (< 1 |fibo_#in~n|) (<= |fibo_#in~n| fibo_~n) (or .cse0 .cse1 (<= 10 |fibo_#in~n|) (and .cse2 (<= |fibo_#t~ret0| 1) (<= |fibo_#in~n| 3) (<= 1 |fibo_#t~ret0|)) (and (<= 13 |fibo_#t~ret0|) (<= |fibo_#in~n| 8) (<= 8 |fibo_#in~n|) (<= |fibo_#t~ret0| 13)) (and (<= |fibo_#t~ret0| 21) .cse2 (<= 21 |fibo_#t~ret0|) (<= 9 fibo_~n)) (and (<= 4 |fibo_#in~n|) (<= fibo_~n 4) (<= 2 |fibo_#t~ret0|) (<= |fibo_#t~ret0| 2)) (and (<= |fibo_#t~ret0| 8) .cse2 (<= 8 |fibo_#t~ret0|) .cse3 (<= |fibo_#in~n| 7)))))) [2018-12-01 14:34:25,813 INFO L448 ceAbstractionStarter]: For program point L8(lines 8 12) no Hoare annotation was computed. [2018-12-01 14:34:25,813 INFO L448 ceAbstractionStarter]: For program point L11-3(line 11) no Hoare annotation was computed. [2018-12-01 14:34:25,813 INFO L448 ceAbstractionStarter]: For program point L6(lines 6 12) no Hoare annotation was computed. [2018-12-01 14:34:25,813 INFO L451 ceAbstractionStarter]: At program point fiboENTRY(lines 5 13) the Hoare annotation is: true [2018-12-01 14:34:25,815 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.12 02:34:25 BoogieIcfgContainer [2018-12-01 14:34:25,816 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-01 14:34:25,816 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-01 14:34:25,816 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-01 14:34:25,816 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-01 14:34:25,817 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 02:34:11" (3/4) ... [2018-12-01 14:34:25,819 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-12-01 14:34:25,824 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-12-01 14:34:25,824 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-12-01 14:34:25,824 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo [2018-12-01 14:34:25,827 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-12-01 14:34:25,827 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-12-01 14:34:25,827 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-12-01 14:34:25,850 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_2a7a8eb4-28fe-4ed0-bb49-066b61e4d916/bin-2019/uautomizer/witness.graphml [2018-12-01 14:34:25,850 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-01 14:34:25,851 INFO L168 Benchmark]: Toolchain (without parser) took 14499.15 ms. Allocated memory was 1.0 GB in the beginning and 2.9 GB in the end (delta: 1.9 GB). Free memory was 958.0 MB in the beginning and 2.0 GB in the end (delta: -1.1 GB). Peak memory consumption was 806.0 MB. Max. memory is 11.5 GB. [2018-12-01 14:34:25,851 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 976.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-01 14:34:25,851 INFO L168 Benchmark]: CACSL2BoogieTranslator took 132.97 ms. Allocated memory is still 1.0 GB. Free memory was 958.0 MB in the beginning and 947.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-12-01 14:34:25,852 INFO L168 Benchmark]: Boogie Procedure Inliner took 15.02 ms. Allocated memory is still 1.0 GB. Free memory is still 947.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-01 14:34:25,852 INFO L168 Benchmark]: Boogie Preprocessor took 10.28 ms. Allocated memory is still 1.0 GB. Free memory is still 947.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-01 14:34:25,852 INFO L168 Benchmark]: RCFGBuilder took 145.53 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 118.5 MB). Free memory was 947.3 MB in the beginning and 1.1 GB in the end (delta: -157.6 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. [2018-12-01 14:34:25,852 INFO L168 Benchmark]: TraceAbstraction took 14157.93 ms. Allocated memory was 1.1 GB in the beginning and 2.9 GB in the end (delta: 1.8 GB). Free memory was 1.1 GB in the beginning and 2.0 GB in the end (delta: -935.7 MB). Peak memory consumption was 834.3 MB. Max. memory is 11.5 GB. [2018-12-01 14:34:25,853 INFO L168 Benchmark]: Witness Printer took 34.34 ms. Allocated memory is still 2.9 GB. Free memory is still 2.0 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-01 14:34:25,854 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 976.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 132.97 ms. Allocated memory is still 1.0 GB. Free memory was 958.0 MB in the beginning and 947.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 15.02 ms. Allocated memory is still 1.0 GB. Free memory is still 947.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 10.28 ms. Allocated memory is still 1.0 GB. Free memory is still 947.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 145.53 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 118.5 MB). Free memory was 947.3 MB in the beginning and 1.1 GB in the end (delta: -157.6 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 14157.93 ms. Allocated memory was 1.1 GB in the beginning and 2.9 GB in the end (delta: 1.8 GB). Free memory was 1.1 GB in the beginning and 2.0 GB in the end (delta: -935.7 MB). Peak memory consumption was 834.3 MB. Max. memory is 11.5 GB. * Witness Printer took 34.34 ms. Allocated memory is still 2.9 GB. Free memory is still 2.0 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 27]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 24 locations, 1 error locations. SAFE Result, 14.1s OverallTime, 17 OverallIterations, 245 TraceHistogramMax, 3.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.8s HoareAnnotationTime, HoareTripleCheckerStatistics: 434 SDtfs, 777 SDslu, 2714 SDs, 0 SdLazy, 3815 SolverSat, 948 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7953 GetRequests, 7515 SyntacticMatches, 92 SemanticMatches, 346 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2119 ImplicationChecksByTransitivity, 2.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=144occurred in iteration=16, 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: 0.1s AutomataMinimizationTime, 17 MinimizatonAttempts, 99 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 284 PreInvPairs, 486 NumberOfFragments, 193 HoareAnnotationTreeSize, 284 FomulaSimplifications, 2239 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 8 FomulaSimplificationsInter, 6754 FormulaSimplificationTreeSizeReductionInter, 0.6s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 1.7s SatisfiabilityAnalysisTime, 5.2s InterpolantComputationTime, 14545 NumberOfCodeBlocks, 13915 NumberOfCodeBlocksAsserted, 334 NumberOfCheckSat, 14513 ConstructedInterpolants, 0 QuantifiedInterpolants, 27285335 SizeOfPredicates, 99 NumberOfNonLiveVariables, 14656 ConjunctsInSsa, 908 ConjunctsInUnsatCore, 32 InterpolantComputations, 2 PerfectInterpolantSequences, 821776/927294 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...