./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/id_i10_o10_true-unreach-call_true-termination.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0cd3be1d Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_bf204766-2a0e-4bc0-acae-c8d7ba68fb02/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_bf204766-2a0e-4bc0-acae-c8d7ba68fb02/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_bf204766-2a0e-4bc0-acae-c8d7ba68fb02/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_bf204766-2a0e-4bc0-acae-c8d7ba68fb02/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/id_i10_o10_true-unreach-call_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_bf204766-2a0e-4bc0-acae-c8d7ba68fb02/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_bf204766-2a0e-4bc0-acae-c8d7ba68fb02/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 d354f5dc1a4e4616bf2c7c7fc4888805a134a8dd ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-0cd3be1 [2018-11-28 13:28:16,973 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-28 13:28:16,974 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-28 13:28:16,982 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-28 13:28:16,982 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-28 13:28:16,982 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-28 13:28:16,983 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-28 13:28:16,984 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-28 13:28:16,985 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-28 13:28:16,986 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-28 13:28:16,987 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-28 13:28:16,987 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-28 13:28:16,987 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-28 13:28:16,988 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-28 13:28:16,989 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-28 13:28:16,989 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-28 13:28:16,990 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-28 13:28:16,991 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-28 13:28:16,992 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-28 13:28:16,994 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-28 13:28:16,994 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-28 13:28:16,995 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-28 13:28:16,997 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-28 13:28:16,997 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-28 13:28:16,997 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-28 13:28:16,998 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-28 13:28:16,999 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-28 13:28:16,999 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-28 13:28:17,000 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-28 13:28:17,001 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-28 13:28:17,001 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-28 13:28:17,001 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-28 13:28:17,002 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-28 13:28:17,002 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-28 13:28:17,002 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-28 13:28:17,003 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-28 13:28:17,003 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_bf204766-2a0e-4bc0-acae-c8d7ba68fb02/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-11-28 13:28:17,013 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-28 13:28:17,013 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-28 13:28:17,014 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-28 13:28:17,014 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-11-28 13:28:17,014 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-28 13:28:17,014 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-28 13:28:17,014 INFO L133 SettingsManager]: * Use SBE=true [2018-11-28 13:28:17,015 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-28 13:28:17,015 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-28 13:28:17,015 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-28 13:28:17,015 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-28 13:28:17,015 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-28 13:28:17,015 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-28 13:28:17,015 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-28 13:28:17,015 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-28 13:28:17,015 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-28 13:28:17,015 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-28 13:28:17,015 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-28 13:28:17,016 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-28 13:28:17,016 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-28 13:28:17,016 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-28 13:28:17,016 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-28 13:28:17,016 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-28 13:28:17,016 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-28 13:28:17,016 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-28 13:28:17,016 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-28 13:28:17,016 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-28 13:28:17,016 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-28 13:28:17,016 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-28 13:28:17,016 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-28 13:28:17,016 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_bf204766-2a0e-4bc0-acae-c8d7ba68fb02/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 -> d354f5dc1a4e4616bf2c7c7fc4888805a134a8dd [2018-11-28 13:28:17,041 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-28 13:28:17,048 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-28 13:28:17,051 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-28 13:28:17,051 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-28 13:28:17,052 INFO L276 PluginConnector]: CDTParser initialized [2018-11-28 13:28:17,052 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_bf204766-2a0e-4bc0-acae-c8d7ba68fb02/bin-2019/uautomizer/../../sv-benchmarks/c/recursive-simple/id_i10_o10_true-unreach-call_true-termination.c [2018-11-28 13:28:17,096 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_bf204766-2a0e-4bc0-acae-c8d7ba68fb02/bin-2019/uautomizer/data/d0bd5531b/de8290b6802e4bd49969c9889cb69e94/FLAGb4e8be3c8 [2018-11-28 13:28:17,407 INFO L307 CDTParser]: Found 1 translation units. [2018-11-28 13:28:17,407 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_bf204766-2a0e-4bc0-acae-c8d7ba68fb02/sv-benchmarks/c/recursive-simple/id_i10_o10_true-unreach-call_true-termination.c [2018-11-28 13:28:17,411 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_bf204766-2a0e-4bc0-acae-c8d7ba68fb02/bin-2019/uautomizer/data/d0bd5531b/de8290b6802e4bd49969c9889cb69e94/FLAGb4e8be3c8 [2018-11-28 13:28:17,421 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_bf204766-2a0e-4bc0-acae-c8d7ba68fb02/bin-2019/uautomizer/data/d0bd5531b/de8290b6802e4bd49969c9889cb69e94 [2018-11-28 13:28:17,424 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-28 13:28:17,424 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-28 13:28:17,425 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-28 13:28:17,425 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-28 13:28:17,427 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-28 13:28:17,428 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 01:28:17" (1/1) ... [2018-11-28 13:28:17,430 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11bafc58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:28:17, skipping insertion in model container [2018-11-28 13:28:17,430 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 01:28:17" (1/1) ... [2018-11-28 13:28:17,435 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-28 13:28:17,445 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-28 13:28:17,547 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 13:28:17,550 INFO L191 MainTranslator]: Completed pre-run [2018-11-28 13:28:17,559 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 13:28:17,568 INFO L195 MainTranslator]: Completed translation [2018-11-28 13:28:17,569 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:28:17 WrapperNode [2018-11-28 13:28:17,569 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-28 13:28:17,569 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-28 13:28:17,569 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-28 13:28:17,569 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-28 13:28:17,575 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:28:17" (1/1) ... [2018-11-28 13:28:17,579 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:28:17" (1/1) ... [2018-11-28 13:28:17,584 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-28 13:28:17,584 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-28 13:28:17,584 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-28 13:28:17,584 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-28 13:28:17,590 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:28:17" (1/1) ... [2018-11-28 13:28:17,591 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:28:17" (1/1) ... [2018-11-28 13:28:17,591 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:28:17" (1/1) ... [2018-11-28 13:28:17,591 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:28:17" (1/1) ... [2018-11-28 13:28:17,594 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:28:17" (1/1) ... [2018-11-28 13:28:17,595 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:28:17" (1/1) ... [2018-11-28 13:28:17,596 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:28:17" (1/1) ... [2018-11-28 13:28:17,596 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-28 13:28:17,597 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-28 13:28:17,597 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-28 13:28:17,597 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-28 13:28:17,598 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:28:17" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_bf204766-2a0e-4bc0-acae-c8d7ba68fb02/bin-2019/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-28 13:28:17,694 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-28 13:28:17,694 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-28 13:28:17,694 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-28 13:28:17,695 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-28 13:28:17,695 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-28 13:28:17,695 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-28 13:28:17,695 INFO L130 BoogieDeclarations]: Found specification of procedure id [2018-11-28 13:28:17,695 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2018-11-28 13:28:17,813 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-28 13:28:17,813 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-11-28 13:28:17,813 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 01:28:17 BoogieIcfgContainer [2018-11-28 13:28:17,814 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-28 13:28:17,814 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-28 13:28:17,814 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-28 13:28:17,816 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-28 13:28:17,817 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 01:28:17" (1/3) ... [2018-11-28 13:28:17,817 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2796db1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 01:28:17, skipping insertion in model container [2018-11-28 13:28:17,817 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:28:17" (2/3) ... [2018-11-28 13:28:17,818 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2796db1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 01:28:17, skipping insertion in model container [2018-11-28 13:28:17,818 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 01:28:17" (3/3) ... [2018-11-28 13:28:17,819 INFO L112 eAbstractionObserver]: Analyzing ICFG id_i10_o10_true-unreach-call_true-termination.c [2018-11-28 13:28:17,826 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-28 13:28:17,831 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-28 13:28:17,842 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-28 13:28:17,864 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-28 13:28:17,865 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-28 13:28:17,865 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-28 13:28:17,865 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-28 13:28:17,865 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-28 13:28:17,865 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-28 13:28:17,865 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-28 13:28:17,865 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-28 13:28:17,865 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-28 13:28:17,877 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2018-11-28 13:28:17,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-28 13:28:17,882 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:28:17,882 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:28:17,884 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:28:17,888 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:28:17,889 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2018-11-28 13:28:17,890 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:28:17,890 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:28:17,922 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:28:17,922 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:28:17,922 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:28:17,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:28:18,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 13:28:18,003 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 13:28:18,004 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-28 13:28:18,006 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-28 13:28:18,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-28 13:28:18,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-28 13:28:18,017 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2018-11-28 13:28:18,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:28:18,085 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2018-11-28 13:28:18,086 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-28 13:28:18,087 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-11-28 13:28:18,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:28:18,094 INFO L225 Difference]: With dead ends: 30 [2018-11-28 13:28:18,095 INFO L226 Difference]: Without dead ends: 18 [2018-11-28 13:28:18,097 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 [2018-11-28 13:28:18,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-11-28 13:28:18,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-11-28 13:28:18,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-11-28 13:28:18,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2018-11-28 13:28:18,126 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2018-11-28 13:28:18,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:28:18,126 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2018-11-28 13:28:18,127 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-28 13:28:18,127 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2018-11-28 13:28:18,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-11-28 13:28:18,129 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:28:18,129 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:28:18,129 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:28:18,129 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:28:18,130 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2018-11-28 13:28:18,130 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:28:18,130 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:28:18,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:28:18,131 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:28:18,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:28:18,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:28:18,183 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-28 13:28:18,184 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:28:18,184 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_bf204766-2a0e-4bc0-acae-c8d7ba68fb02/bin-2019/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 13:28:18,198 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:28:18,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:28:18,215 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:28:18,241 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-28 13:28:18,259 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:28:18,259 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-11-28 13:28:18,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-28 13:28:18,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-28 13:28:18,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-11-28 13:28:18,260 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2018-11-28 13:28:18,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:28:18,323 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2018-11-28 13:28:18,324 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-28 13:28:18,324 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2018-11-28 13:28:18,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:28:18,325 INFO L225 Difference]: With dead ends: 25 [2018-11-28 13:28:18,325 INFO L226 Difference]: Without dead ends: 21 [2018-11-28 13:28:18,325 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-11-28 13:28:18,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-11-28 13:28:18,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-11-28 13:28:18,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-11-28 13:28:18,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-11-28 13:28:18,329 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2018-11-28 13:28:18,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:28:18,329 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-11-28 13:28:18,329 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-28 13:28:18,329 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-11-28 13:28:18,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-11-28 13:28:18,330 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:28:18,330 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:28:18,331 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:28:18,331 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:28:18,332 INFO L82 PathProgramCache]: Analyzing trace with hash 397359997, now seen corresponding path program 2 times [2018-11-28 13:28:18,332 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:28:18,332 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:28:18,333 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:28:18,333 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:28:18,333 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:28:18,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:28:18,426 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-28 13:28:18,426 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:28:18,426 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_bf204766-2a0e-4bc0-acae-c8d7ba68fb02/bin-2019/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 13:28:18,436 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 13:28:18,454 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 13:28:18,454 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 13:28:18,457 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:28:18,468 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-28 13:28:18,493 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:28:18,494 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-11-28 13:28:18,494 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-28 13:28:18,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-28 13:28:18,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2018-11-28 13:28:18,495 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 7 states. [2018-11-28 13:28:18,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:28:18,548 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2018-11-28 13:28:18,548 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-28 13:28:18,548 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2018-11-28 13:28:18,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:28:18,549 INFO L225 Difference]: With dead ends: 28 [2018-11-28 13:28:18,549 INFO L226 Difference]: Without dead ends: 24 [2018-11-28 13:28:18,549 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-11-28 13:28:18,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-11-28 13:28:18,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-11-28 13:28:18,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-11-28 13:28:18,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2018-11-28 13:28:18,553 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2018-11-28 13:28:18,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:28:18,553 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2018-11-28 13:28:18,553 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-28 13:28:18,553 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2018-11-28 13:28:18,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-11-28 13:28:18,554 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:28:18,554 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:28:18,554 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:28:18,555 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:28:18,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 3 times [2018-11-28 13:28:18,555 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:28:18,555 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:28:18,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:28:18,556 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 13:28:18,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:28:18,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:28:18,626 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-28 13:28:18,626 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:28:18,626 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_bf204766-2a0e-4bc0-acae-c8d7ba68fb02/bin-2019/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 13:28:18,633 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-28 13:28:18,647 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-11-28 13:28:18,647 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 13:28:18,649 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:28:18,670 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-28 13:28:18,693 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:28:18,693 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-11-28 13:28:18,694 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-28 13:28:18,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-28 13:28:18,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-11-28 13:28:18,694 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 8 states. [2018-11-28 13:28:18,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:28:18,761 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2018-11-28 13:28:18,761 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-28 13:28:18,761 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2018-11-28 13:28:18,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:28:18,762 INFO L225 Difference]: With dead ends: 31 [2018-11-28 13:28:18,762 INFO L226 Difference]: Without dead ends: 27 [2018-11-28 13:28:18,762 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2018-11-28 13:28:18,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-11-28 13:28:18,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-11-28 13:28:18,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-11-28 13:28:18,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-11-28 13:28:18,767 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2018-11-28 13:28:18,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:28:18,767 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-11-28 13:28:18,767 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-28 13:28:18,768 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-11-28 13:28:18,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-11-28 13:28:18,768 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:28:18,768 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:28:18,768 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:28:18,769 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:28:18,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1080764669, now seen corresponding path program 4 times [2018-11-28 13:28:18,769 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:28:18,769 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:28:18,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:28:18,770 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 13:28:18,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:28:18,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:28:18,831 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-11-28 13:28:18,831 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:28:18,831 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_bf204766-2a0e-4bc0-acae-c8d7ba68fb02/bin-2019/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 13:28:18,838 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-28 13:28:18,847 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-28 13:28:18,848 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 13:28:18,850 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:28:18,868 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-11-28 13:28:18,893 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:28:18,893 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-11-28 13:28:18,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-28 13:28:18,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-28 13:28:18,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-11-28 13:28:18,895 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 9 states. [2018-11-28 13:28:18,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:28:18,960 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2018-11-28 13:28:18,961 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-28 13:28:18,961 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2018-11-28 13:28:18,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:28:18,962 INFO L225 Difference]: With dead ends: 34 [2018-11-28 13:28:18,962 INFO L226 Difference]: Without dead ends: 30 [2018-11-28 13:28:18,962 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2018-11-28 13:28:18,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-11-28 13:28:18,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-11-28 13:28:18,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-11-28 13:28:18,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2018-11-28 13:28:18,966 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2018-11-28 13:28:18,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:28:18,966 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2018-11-28 13:28:18,966 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-28 13:28:18,967 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2018-11-28 13:28:18,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-11-28 13:28:18,967 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:28:18,967 INFO L402 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:28:18,968 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:28:18,968 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:28:18,968 INFO L82 PathProgramCache]: Analyzing trace with hash -1752970513, now seen corresponding path program 5 times [2018-11-28 13:28:18,968 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:28:18,968 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:28:18,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:28:18,969 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 13:28:18,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:28:18,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:28:19,068 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-11-28 13:28:19,069 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:28:19,069 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_bf204766-2a0e-4bc0-acae-c8d7ba68fb02/bin-2019/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 13:28:19,083 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-28 13:28:19,096 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-11-28 13:28:19,096 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 13:28:19,098 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:28:19,115 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-11-28 13:28:19,130 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:28:19,130 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-11-28 13:28:19,130 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-28 13:28:19,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-28 13:28:19,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-11-28 13:28:19,131 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 10 states. [2018-11-28 13:28:19,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:28:19,202 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2018-11-28 13:28:19,203 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-28 13:28:19,203 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2018-11-28 13:28:19,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:28:19,203 INFO L225 Difference]: With dead ends: 37 [2018-11-28 13:28:19,204 INFO L226 Difference]: Without dead ends: 33 [2018-11-28 13:28:19,204 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2018-11-28 13:28:19,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-11-28 13:28:19,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-11-28 13:28:19,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-11-28 13:28:19,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2018-11-28 13:28:19,207 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2018-11-28 13:28:19,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:28:19,207 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2018-11-28 13:28:19,208 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-28 13:28:19,208 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2018-11-28 13:28:19,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-11-28 13:28:19,208 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:28:19,209 INFO L402 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:28:19,209 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:28:19,209 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:28:19,209 INFO L82 PathProgramCache]: Analyzing trace with hash -1590630787, now seen corresponding path program 6 times [2018-11-28 13:28:19,209 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:28:19,209 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:28:19,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:28:19,210 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 13:28:19,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:28:19,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:28:19,293 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-11-28 13:28:19,293 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:28:19,293 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_bf204766-2a0e-4bc0-acae-c8d7ba68fb02/bin-2019/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 13:28:19,299 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-28 13:28:19,323 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-11-28 13:28:19,323 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 13:28:19,325 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:28:19,339 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-11-28 13:28:19,354 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:28:19,354 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-11-28 13:28:19,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-28 13:28:19,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-28 13:28:19,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2018-11-28 13:28:19,355 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 11 states. [2018-11-28 13:28:19,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:28:19,416 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2018-11-28 13:28:19,422 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-28 13:28:19,422 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 49 [2018-11-28 13:28:19,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:28:19,423 INFO L225 Difference]: With dead ends: 40 [2018-11-28 13:28:19,423 INFO L226 Difference]: Without dead ends: 36 [2018-11-28 13:28:19,424 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2018-11-28 13:28:19,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-11-28 13:28:19,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-11-28 13:28:19,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-11-28 13:28:19,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2018-11-28 13:28:19,429 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2018-11-28 13:28:19,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:28:19,430 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2018-11-28 13:28:19,430 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-28 13:28:19,430 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2018-11-28 13:28:19,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-11-28 13:28:19,431 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:28:19,431 INFO L402 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:28:19,431 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:28:19,431 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:28:19,431 INFO L82 PathProgramCache]: Analyzing trace with hash 1532150511, now seen corresponding path program 7 times [2018-11-28 13:28:19,431 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:28:19,431 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:28:19,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:28:19,432 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 13:28:19,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:28:19,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:28:19,532 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-11-28 13:28:19,532 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:28:19,532 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_bf204766-2a0e-4bc0-acae-c8d7ba68fb02/bin-2019/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 13:28:19,546 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:28:19,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:28:19,564 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:28:19,576 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-11-28 13:28:19,592 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:28:19,592 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-11-28 13:28:19,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-28 13:28:19,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-28 13:28:19,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2018-11-28 13:28:19,593 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 12 states. [2018-11-28 13:28:19,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:28:19,680 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2018-11-28 13:28:19,685 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-28 13:28:19,685 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 55 [2018-11-28 13:28:19,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:28:19,686 INFO L225 Difference]: With dead ends: 43 [2018-11-28 13:28:19,686 INFO L226 Difference]: Without dead ends: 39 [2018-11-28 13:28:19,687 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2018-11-28 13:28:19,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-11-28 13:28:19,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-11-28 13:28:19,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-11-28 13:28:19,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2018-11-28 13:28:19,691 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2018-11-28 13:28:19,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:28:19,692 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2018-11-28 13:28:19,692 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-28 13:28:19,692 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2018-11-28 13:28:19,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-11-28 13:28:19,693 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:28:19,693 INFO L402 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:28:19,694 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:28:19,694 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:28:19,694 INFO L82 PathProgramCache]: Analyzing trace with hash 1140618237, now seen corresponding path program 8 times [2018-11-28 13:28:19,694 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:28:19,694 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:28:19,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:28:19,695 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:28:19,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:28:19,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:28:19,793 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2018-11-28 13:28:19,793 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:28:19,793 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_bf204766-2a0e-4bc0-acae-c8d7ba68fb02/bin-2019/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 13:28:19,799 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 13:28:19,813 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 13:28:19,813 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 13:28:19,815 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:28:19,836 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2018-11-28 13:28:19,851 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:28:19,851 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-11-28 13:28:19,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-28 13:28:19,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-28 13:28:19,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2018-11-28 13:28:19,852 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 13 states. [2018-11-28 13:28:19,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:28:19,929 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2018-11-28 13:28:19,930 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-28 13:28:19,930 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2018-11-28 13:28:19,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:28:19,931 INFO L225 Difference]: With dead ends: 46 [2018-11-28 13:28:19,931 INFO L226 Difference]: Without dead ends: 42 [2018-11-28 13:28:19,931 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2018-11-28 13:28:19,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-11-28 13:28:19,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-11-28 13:28:19,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-11-28 13:28:19,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2018-11-28 13:28:19,935 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2018-11-28 13:28:19,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:28:19,935 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2018-11-28 13:28:19,935 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-28 13:28:19,935 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2018-11-28 13:28:19,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-11-28 13:28:19,935 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:28:19,936 INFO L402 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:28:19,936 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:28:19,936 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:28:19,936 INFO L82 PathProgramCache]: Analyzing trace with hash -1749177617, now seen corresponding path program 9 times [2018-11-28 13:28:19,936 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:28:19,936 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:28:19,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:28:19,936 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 13:28:19,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:28:19,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:28:20,030 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-11-28 13:28:20,030 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:28:20,030 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_bf204766-2a0e-4bc0-acae-c8d7ba68fb02/bin-2019/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 13:28:20,038 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-28 13:28:20,069 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-11-28 13:28:20,069 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 13:28:20,072 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:28:20,104 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-11-28 13:28:20,123 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:28:20,123 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-11-28 13:28:20,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-28 13:28:20,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-28 13:28:20,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2018-11-28 13:28:20,125 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 14 states. [2018-11-28 13:28:20,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:28:20,235 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2018-11-28 13:28:20,235 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-28 13:28:20,235 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 67 [2018-11-28 13:28:20,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:28:20,236 INFO L225 Difference]: With dead ends: 49 [2018-11-28 13:28:20,236 INFO L226 Difference]: Without dead ends: 45 [2018-11-28 13:28:20,236 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2018-11-28 13:28:20,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-11-28 13:28:20,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-11-28 13:28:20,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-11-28 13:28:20,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2018-11-28 13:28:20,239 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2018-11-28 13:28:20,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:28:20,240 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2018-11-28 13:28:20,240 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-28 13:28:20,240 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2018-11-28 13:28:20,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-11-28 13:28:20,241 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:28:20,241 INFO L402 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:28:20,241 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:28:20,241 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:28:20,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1580609155, now seen corresponding path program 10 times [2018-11-28 13:28:20,241 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:28:20,242 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:28:20,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:28:20,242 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 13:28:20,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:28:20,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:28:20,624 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2018-11-28 13:28:20,624 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:28:20,624 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_bf204766-2a0e-4bc0-acae-c8d7ba68fb02/bin-2019/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 13:28:20,634 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-28 13:28:20,654 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-28 13:28:20,654 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 13:28:20,658 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:28:20,731 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2018-11-28 13:28:20,751 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:28:20,751 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-11-28 13:28:20,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-11-28 13:28:20,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-11-28 13:28:20,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2018-11-28 13:28:20,752 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 25 states. [2018-11-28 13:28:20,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:28:20,938 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2018-11-28 13:28:20,938 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-11-28 13:28:20,938 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 73 [2018-11-28 13:28:20,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:28:20,939 INFO L225 Difference]: With dead ends: 52 [2018-11-28 13:28:20,939 INFO L226 Difference]: Without dead ends: 48 [2018-11-28 13:28:20,940 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 72 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2018-11-28 13:28:20,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-11-28 13:28:20,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-11-28 13:28:20,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-11-28 13:28:20,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2018-11-28 13:28:20,944 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2018-11-28 13:28:20,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:28:20,944 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2018-11-28 13:28:20,944 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-11-28 13:28:20,944 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2018-11-28 13:28:20,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-11-28 13:28:20,945 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:28:20,945 INFO L402 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:28:20,945 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:28:20,946 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:28:20,948 INFO L82 PathProgramCache]: Analyzing trace with hash -223837457, now seen corresponding path program 11 times [2018-11-28 13:28:20,949 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:28:20,949 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:28:20,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:28:20,950 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 13:28:20,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:28:20,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:28:21,085 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 187 proven. 0 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2018-11-28 13:28:21,085 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 13:28:21,085 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2018-11-28 13:28:21,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-28 13:28:21,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-28 13:28:21,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2018-11-28 13:28:21,086 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 16 states. [2018-11-28 13:28:21,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:28:21,215 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2018-11-28 13:28:21,216 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-28 13:28:21,216 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 79 [2018-11-28 13:28:21,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:28:21,217 INFO L225 Difference]: With dead ends: 48 [2018-11-28 13:28:21,217 INFO L226 Difference]: Without dead ends: 0 [2018-11-28 13:28:21,217 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=275, Invalid=481, Unknown=0, NotChecked=0, Total=756 [2018-11-28 13:28:21,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-28 13:28:21,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-28 13:28:21,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-28 13:28:21,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-28 13:28:21,218 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 79 [2018-11-28 13:28:21,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:28:21,218 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-28 13:28:21,218 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-28 13:28:21,218 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-28 13:28:21,219 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-28 13:28:21,223 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-28 13:28:21,242 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-11-28 13:28:21,242 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-28 13:28:21,242 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-28 13:28:21,242 INFO L451 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-28 13:28:21,242 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-28 13:28:21,242 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-28 13:28:21,242 INFO L451 ceAbstractionStarter]: At program point mainENTRY(lines 9 15) the Hoare annotation is: true [2018-11-28 13:28:21,242 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 9 15) no Hoare annotation was computed. [2018-11-28 13:28:21,242 INFO L448 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2018-11-28 13:28:21,242 INFO L448 ceAbstractionStarter]: For program point L13(line 13) no Hoare annotation was computed. [2018-11-28 13:28:21,243 INFO L448 ceAbstractionStarter]: For program point L12(lines 12 14) no Hoare annotation was computed. [2018-11-28 13:28:21,243 INFO L444 ceAbstractionStarter]: At program point L11(line 11) the Hoare annotation is: (and (<= 10 main_~input~0) (<= main_~input~0 10)) [2018-11-28 13:28:21,243 INFO L448 ceAbstractionStarter]: For program point L11-1(line 11) no Hoare annotation was computed. [2018-11-28 13:28:21,243 INFO L448 ceAbstractionStarter]: For program point L12-2(lines 9 15) no Hoare annotation was computed. [2018-11-28 13:28:21,243 INFO L448 ceAbstractionStarter]: For program point idFINAL(lines 4 7) no Hoare annotation was computed. [2018-11-28 13:28:21,243 INFO L448 ceAbstractionStarter]: For program point idEXIT(lines 4 7) no Hoare annotation was computed. [2018-11-28 13:28:21,243 INFO L451 ceAbstractionStarter]: At program point idENTRY(lines 4 7) the Hoare annotation is: true [2018-11-28 13:28:21,243 INFO L444 ceAbstractionStarter]: At program point L6(line 6) the Hoare annotation is: (and (<= |id_#in~x| id_~x) (<= id_~x |id_#in~x|)) [2018-11-28 13:28:21,243 INFO L448 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2018-11-28 13:28:21,243 INFO L448 ceAbstractionStarter]: For program point L6-1(line 6) no Hoare annotation was computed. [2018-11-28 13:28:21,245 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 01:28:21 BoogieIcfgContainer [2018-11-28 13:28:21,246 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-28 13:28:21,246 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-28 13:28:21,246 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-28 13:28:21,246 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-28 13:28:21,247 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 01:28:17" (3/4) ... [2018-11-28 13:28:21,250 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-28 13:28:21,255 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-28 13:28:21,255 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-28 13:28:21,255 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure id [2018-11-28 13:28:21,258 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-11-28 13:28:21,258 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-11-28 13:28:21,258 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-28 13:28:21,289 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_bf204766-2a0e-4bc0-acae-c8d7ba68fb02/bin-2019/uautomizer/witness.graphml [2018-11-28 13:28:21,289 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-28 13:28:21,289 INFO L168 Benchmark]: Toolchain (without parser) took 3865.47 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 167.8 MB). Free memory was 953.3 MB in the beginning and 1.1 GB in the end (delta: -101.0 MB). Peak memory consumption was 66.7 MB. Max. memory is 11.5 GB. [2018-11-28 13:28:21,290 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 1.0 GB. Free memory is still 979.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 13:28:21,291 INFO L168 Benchmark]: CACSL2BoogieTranslator took 143.94 ms. Allocated memory is still 1.0 GB. Free memory was 953.3 MB in the beginning and 945.2 MB in the end (delta: 8.1 MB). Peak memory consumption was 8.1 MB. Max. memory is 11.5 GB. [2018-11-28 13:28:21,291 INFO L168 Benchmark]: Boogie Procedure Inliner took 14.66 ms. Allocated memory is still 1.0 GB. Free memory is still 942.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 13:28:21,291 INFO L168 Benchmark]: Boogie Preprocessor took 12.50 ms. Allocated memory is still 1.0 GB. Free memory is still 942.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 13:28:21,291 INFO L168 Benchmark]: RCFGBuilder took 216.94 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 125.8 MB). Free memory was 942.5 MB in the beginning and 1.1 GB in the end (delta: -171.3 MB). Peak memory consumption was 15.6 MB. Max. memory is 11.5 GB. [2018-11-28 13:28:21,292 INFO L168 Benchmark]: TraceAbstraction took 3431.54 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 41.9 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 59.5 MB). Peak memory consumption was 101.4 MB. Max. memory is 11.5 GB. [2018-11-28 13:28:21,292 INFO L168 Benchmark]: Witness Printer took 42.86 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 13:28:21,294 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 1.0 GB. Free memory is still 979.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 143.94 ms. Allocated memory is still 1.0 GB. Free memory was 953.3 MB in the beginning and 945.2 MB in the end (delta: 8.1 MB). Peak memory consumption was 8.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 14.66 ms. Allocated memory is still 1.0 GB. Free memory is still 942.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 12.50 ms. Allocated memory is still 1.0 GB. Free memory is still 942.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 216.94 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 125.8 MB). Free memory was 942.5 MB in the beginning and 1.1 GB in the end (delta: -171.3 MB). Peak memory consumption was 15.6 MB. Max. memory is 11.5 GB. * TraceAbstraction took 3431.54 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 41.9 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 59.5 MB). Peak memory consumption was 101.4 MB. Max. memory is 11.5 GB. * Witness Printer took 42.86 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 13]: 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, 20 locations, 1 error locations. SAFE Result, 3.3s OverallTime, 12 OverallIterations, 12 TraceHistogramMax, 1.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 200 SDtfs, 167 SDslu, 1340 SDs, 0 SdLazy, 781 SolverSat, 13 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 709 GetRequests, 528 SyntacticMatches, 2 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 1.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=48occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 12 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 9 PreInvPairs, 9 NumberOfFragments, 19 HoareAnnotationTreeSize, 9 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.4s InterpolantComputationTime, 1012 NumberOfCodeBlocks, 1007 NumberOfCodeBlocksAsserted, 48 NumberOfCheckSat, 990 ConstructedInterpolants, 0 QuantifiedInterpolants, 142392 SizeOfPredicates, 64 NumberOfNonLiveVariables, 1060 ConjunctsInSsa, 173 ConjunctsInUnsatCore, 22 InterpolantComputations, 2 PerfectInterpolantSequences, 1584/2794 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...