./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/sum_15x0-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b5699aa Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_477c4ca5-7c4b-480d-91b7-d7fbac317280/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_477c4ca5-7c4b-480d-91b7-d7fbac317280/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_477c4ca5-7c4b-480d-91b7-d7fbac317280/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_477c4ca5-7c4b-480d-91b7-d7fbac317280/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/sum_15x0-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_477c4ca5-7c4b-480d-91b7-d7fbac317280/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_477c4ca5-7c4b-480d-91b7-d7fbac317280/bin/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 31319b3dce926b7eddaa50d24c240f6870931f21 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.24-6b5699a [2019-11-25 08:53:21,744 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-25 08:53:21,746 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-25 08:53:21,756 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-25 08:53:21,756 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-25 08:53:21,757 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-25 08:53:21,759 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-25 08:53:21,761 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-25 08:53:21,763 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-25 08:53:21,764 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-25 08:53:21,765 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-25 08:53:21,766 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-25 08:53:21,766 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-25 08:53:21,767 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-25 08:53:21,768 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-25 08:53:21,770 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-25 08:53:21,770 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-25 08:53:21,771 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-25 08:53:21,773 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-25 08:53:21,775 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-25 08:53:21,776 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-25 08:53:21,778 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-25 08:53:21,779 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-25 08:53:21,779 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-25 08:53:21,782 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-25 08:53:21,782 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-25 08:53:21,782 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-25 08:53:21,783 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-25 08:53:21,784 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-25 08:53:21,785 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-25 08:53:21,785 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-25 08:53:21,785 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-25 08:53:21,786 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-25 08:53:21,787 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-25 08:53:21,788 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-25 08:53:21,788 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-25 08:53:21,788 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-25 08:53:21,789 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-25 08:53:21,789 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-25 08:53:21,790 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-25 08:53:21,790 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-25 08:53:21,791 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_477c4ca5-7c4b-480d-91b7-d7fbac317280/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-25 08:53:21,804 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-25 08:53:21,805 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-25 08:53:21,806 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-25 08:53:21,806 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-25 08:53:21,806 INFO L138 SettingsManager]: * Use SBE=true [2019-11-25 08:53:21,806 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-25 08:53:21,807 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-25 08:53:21,807 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-25 08:53:21,807 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-25 08:53:21,807 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-25 08:53:21,807 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-25 08:53:21,808 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-25 08:53:21,808 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-25 08:53:21,808 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-25 08:53:21,808 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-25 08:53:21,809 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-25 08:53:21,809 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-25 08:53:21,809 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-25 08:53:21,809 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-25 08:53:21,810 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-25 08:53:21,810 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-25 08:53:21,810 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-25 08:53:21,810 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-25 08:53:21,810 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-25 08:53:21,811 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-25 08:53:21,811 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-25 08:53:21,811 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-25 08:53:21,811 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-25 08:53:21,811 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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/run_dir_477c4ca5-7c4b-480d-91b7-d7fbac317280/bin/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 -> 31319b3dce926b7eddaa50d24c240f6870931f21 [2019-11-25 08:53:21,952 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-25 08:53:21,963 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-25 08:53:21,966 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-25 08:53:21,967 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-25 08:53:21,968 INFO L275 PluginConnector]: CDTParser initialized [2019-11-25 08:53:21,968 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_477c4ca5-7c4b-480d-91b7-d7fbac317280/bin/uautomizer/../../sv-benchmarks/c/recursive-simple/sum_15x0-2.c [2019-11-25 08:53:22,018 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_477c4ca5-7c4b-480d-91b7-d7fbac317280/bin/uautomizer/data/522a3078b/a2fd0168e05c499f9f437db9e72f497c/FLAG78b8b69b0 [2019-11-25 08:53:22,406 INFO L306 CDTParser]: Found 1 translation units. [2019-11-25 08:53:22,407 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_477c4ca5-7c4b-480d-91b7-d7fbac317280/sv-benchmarks/c/recursive-simple/sum_15x0-2.c [2019-11-25 08:53:22,412 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_477c4ca5-7c4b-480d-91b7-d7fbac317280/bin/uautomizer/data/522a3078b/a2fd0168e05c499f9f437db9e72f497c/FLAG78b8b69b0 [2019-11-25 08:53:22,427 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_477c4ca5-7c4b-480d-91b7-d7fbac317280/bin/uautomizer/data/522a3078b/a2fd0168e05c499f9f437db9e72f497c [2019-11-25 08:53:22,430 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-25 08:53:22,432 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-25 08:53:22,434 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-25 08:53:22,435 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-25 08:53:22,438 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-25 08:53:22,439 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:53:22" (1/1) ... [2019-11-25 08:53:22,442 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2928109 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:53:22, skipping insertion in model container [2019-11-25 08:53:22,442 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:53:22" (1/1) ... [2019-11-25 08:53:22,448 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-25 08:53:22,464 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-25 08:53:22,649 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-25 08:53:22,655 INFO L201 MainTranslator]: Completed pre-run [2019-11-25 08:53:22,729 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-25 08:53:22,742 INFO L205 MainTranslator]: Completed translation [2019-11-25 08:53:22,742 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:53:22 WrapperNode [2019-11-25 08:53:22,743 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-25 08:53:22,744 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-25 08:53:22,744 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-25 08:53:22,745 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-25 08:53:22,753 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:53:22" (1/1) ... [2019-11-25 08:53:22,758 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:53:22" (1/1) ... [2019-11-25 08:53:22,771 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-25 08:53:22,772 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-25 08:53:22,772 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-25 08:53:22,772 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-25 08:53:22,778 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:53:22" (1/1) ... [2019-11-25 08:53:22,778 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:53:22" (1/1) ... [2019-11-25 08:53:22,779 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:53:22" (1/1) ... [2019-11-25 08:53:22,779 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:53:22" (1/1) ... [2019-11-25 08:53:22,780 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:53:22" (1/1) ... [2019-11-25 08:53:22,782 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:53:22" (1/1) ... [2019-11-25 08:53:22,782 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:53:22" (1/1) ... [2019-11-25 08:53:22,783 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-25 08:53:22,784 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-25 08:53:22,784 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-25 08:53:22,784 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-25 08:53:22,785 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:53:22" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_477c4ca5-7c4b-480d-91b7-d7fbac317280/bin/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 [2019-11-25 08:53:22,837 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-25 08:53:22,837 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-25 08:53:22,837 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2019-11-25 08:53:22,837 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2019-11-25 08:53:22,980 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-25 08:53:22,980 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-25 08:53:22,981 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:53:22 BoogieIcfgContainer [2019-11-25 08:53:22,981 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-25 08:53:22,982 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-25 08:53:22,982 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-25 08:53:22,985 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-25 08:53:22,985 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 08:53:22" (1/3) ... [2019-11-25 08:53:22,986 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79c6939b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:53:22, skipping insertion in model container [2019-11-25 08:53:22,986 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:53:22" (2/3) ... [2019-11-25 08:53:22,986 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79c6939b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:53:22, skipping insertion in model container [2019-11-25 08:53:22,986 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:53:22" (3/3) ... [2019-11-25 08:53:22,988 INFO L109 eAbstractionObserver]: Analyzing ICFG sum_15x0-2.c [2019-11-25 08:53:22,996 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-25 08:53:23,001 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-25 08:53:23,009 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-25 08:53:23,028 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-25 08:53:23,028 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-25 08:53:23,028 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-25 08:53:23,028 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-25 08:53:23,028 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-25 08:53:23,029 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-25 08:53:23,029 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-25 08:53:23,029 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-25 08:53:23,042 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2019-11-25 08:53:23,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-25 08:53:23,046 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:53:23,047 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:53:23,047 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:53:23,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:53:23,052 INFO L82 PathProgramCache]: Analyzing trace with hash 389977641, now seen corresponding path program 1 times [2019-11-25 08:53:23,057 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:53:23,058 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950753305] [2019-11-25 08:53:23,058 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:53:23,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:23,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:23,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:53:23,403 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950753305] [2019-11-25 08:53:23,404 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:53:23,404 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-25 08:53:23,405 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329764700] [2019-11-25 08:53:23,408 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-25 08:53:23,408 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:53:23,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-25 08:53:23,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-25 08:53:23,419 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 7 states. [2019-11-25 08:53:23,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:53:23,512 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2019-11-25 08:53:23,513 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-25 08:53:23,514 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 9 [2019-11-25 08:53:23,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:53:23,521 INFO L225 Difference]: With dead ends: 24 [2019-11-25 08:53:23,522 INFO L226 Difference]: Without dead ends: 14 [2019-11-25 08:53:23,524 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-11-25 08:53:23,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-11-25 08:53:23,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-11-25 08:53:23,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-25 08:53:23,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2019-11-25 08:53:23,553 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9 [2019-11-25 08:53:23,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:53:23,554 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2019-11-25 08:53:23,554 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-25 08:53:23,554 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2019-11-25 08:53:23,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-25 08:53:23,555 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:53:23,555 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:53:23,555 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:53:23,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:53:23,556 INFO L82 PathProgramCache]: Analyzing trace with hash -881029229, now seen corresponding path program 1 times [2019-11-25 08:53:23,556 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:53:23,556 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458924514] [2019-11-25 08:53:23,556 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:53:23,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:23,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:23,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:23,737 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-25 08:53:23,737 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458924514] [2019-11-25 08:53:23,738 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184592597] [2019-11-25 08:53:23,738 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_477c4ca5-7c4b-480d-91b7-d7fbac317280/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:53:23,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:23,783 INFO L255 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-25 08:53:23,788 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:53:23,831 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-25 08:53:23,831 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:53:23,831 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 9 [2019-11-25 08:53:23,832 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708782349] [2019-11-25 08:53:23,833 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-25 08:53:23,833 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:53:23,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-25 08:53:23,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2019-11-25 08:53:23,834 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 9 states. [2019-11-25 08:53:23,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:53:23,933 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2019-11-25 08:53:23,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-25 08:53:23,934 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2019-11-25 08:53:23,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:53:23,935 INFO L225 Difference]: With dead ends: 21 [2019-11-25 08:53:23,935 INFO L226 Difference]: Without dead ends: 17 [2019-11-25 08:53:23,936 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2019-11-25 08:53:23,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-25 08:53:23,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-11-25 08:53:23,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-25 08:53:23,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2019-11-25 08:53:23,942 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2019-11-25 08:53:23,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:53:23,942 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2019-11-25 08:53:23,943 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-25 08:53:23,943 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2019-11-25 08:53:23,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-25 08:53:23,946 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:53:23,947 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:53:24,151 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:53:24,151 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:53:24,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:53:24,152 INFO L82 PathProgramCache]: Analyzing trace with hash -1824240471, now seen corresponding path program 2 times [2019-11-25 08:53:24,152 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:53:24,152 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280315889] [2019-11-25 08:53:24,152 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:53:24,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:24,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:24,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:24,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:24,332 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-25 08:53:24,333 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280315889] [2019-11-25 08:53:24,333 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178773652] [2019-11-25 08:53:24,333 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_477c4ca5-7c4b-480d-91b7-d7fbac317280/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:53:24,365 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-25 08:53:24,365 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:53:24,366 INFO L255 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-25 08:53:24,368 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:53:24,397 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-25 08:53:24,398 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:53:24,398 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 10 [2019-11-25 08:53:24,398 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131452453] [2019-11-25 08:53:24,398 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-25 08:53:24,399 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:53:24,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-25 08:53:24,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2019-11-25 08:53:24,399 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 10 states. [2019-11-25 08:53:24,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:53:24,500 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2019-11-25 08:53:24,500 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-25 08:53:24,501 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 21 [2019-11-25 08:53:24,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:53:24,502 INFO L225 Difference]: With dead ends: 24 [2019-11-25 08:53:24,502 INFO L226 Difference]: Without dead ends: 20 [2019-11-25 08:53:24,502 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2019-11-25 08:53:24,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-25 08:53:24,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-11-25 08:53:24,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-25 08:53:24,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2019-11-25 08:53:24,507 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 21 [2019-11-25 08:53:24,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:53:24,507 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2019-11-25 08:53:24,507 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-25 08:53:24,507 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2019-11-25 08:53:24,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-25 08:53:24,512 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:53:24,512 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:53:24,715 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:53:24,716 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:53:24,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:53:24,716 INFO L82 PathProgramCache]: Analyzing trace with hash -28473709, now seen corresponding path program 3 times [2019-11-25 08:53:24,716 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:53:24,717 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100490427] [2019-11-25 08:53:24,717 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:53:24,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:24,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:24,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:24,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:24,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:24,915 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-25 08:53:24,916 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100490427] [2019-11-25 08:53:24,916 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649724929] [2019-11-25 08:53:24,916 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_477c4ca5-7c4b-480d-91b7-d7fbac317280/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:53:24,953 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-25 08:53:24,953 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:53:24,954 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-25 08:53:24,956 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:53:24,990 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-25 08:53:24,990 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:53:24,991 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 11 [2019-11-25 08:53:24,991 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714396497] [2019-11-25 08:53:24,991 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-25 08:53:24,992 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:53:24,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-25 08:53:24,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2019-11-25 08:53:24,992 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 11 states. [2019-11-25 08:53:25,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:53:25,082 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2019-11-25 08:53:25,082 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-25 08:53:25,082 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 27 [2019-11-25 08:53:25,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:53:25,083 INFO L225 Difference]: With dead ends: 27 [2019-11-25 08:53:25,083 INFO L226 Difference]: Without dead ends: 23 [2019-11-25 08:53:25,084 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2019-11-25 08:53:25,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-25 08:53:25,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-11-25 08:53:25,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-25 08:53:25,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2019-11-25 08:53:25,089 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 27 [2019-11-25 08:53:25,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:53:25,090 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2019-11-25 08:53:25,090 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-25 08:53:25,090 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2019-11-25 08:53:25,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-25 08:53:25,091 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:53:25,091 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:53:25,301 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:53:25,302 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:53:25,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:53:25,302 INFO L82 PathProgramCache]: Analyzing trace with hash -2080894167, now seen corresponding path program 4 times [2019-11-25 08:53:25,303 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:53:25,303 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021346237] [2019-11-25 08:53:25,303 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:53:25,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:25,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:25,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:25,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:25,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:25,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:25,516 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-11-25 08:53:25,517 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021346237] [2019-11-25 08:53:25,517 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432446869] [2019-11-25 08:53:25,517 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_477c4ca5-7c4b-480d-91b7-d7fbac317280/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:53:25,551 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-25 08:53:25,552 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:53:25,552 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-25 08:53:25,555 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:53:25,599 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-11-25 08:53:25,600 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:53:25,600 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 12 [2019-11-25 08:53:25,600 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590090412] [2019-11-25 08:53:25,601 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-25 08:53:25,601 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:53:25,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-25 08:53:25,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2019-11-25 08:53:25,602 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 12 states. [2019-11-25 08:53:25,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:53:25,723 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2019-11-25 08:53:25,724 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-25 08:53:25,724 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 33 [2019-11-25 08:53:25,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:53:25,725 INFO L225 Difference]: With dead ends: 30 [2019-11-25 08:53:25,725 INFO L226 Difference]: Without dead ends: 26 [2019-11-25 08:53:25,726 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2019-11-25 08:53:25,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-25 08:53:25,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-11-25 08:53:25,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-25 08:53:25,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2019-11-25 08:53:25,731 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 33 [2019-11-25 08:53:25,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:53:25,732 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2019-11-25 08:53:25,733 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-25 08:53:25,733 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2019-11-25 08:53:25,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-25 08:53:25,735 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:53:25,735 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:53:25,939 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:53:25,939 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:53:25,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:53:25,939 INFO L82 PathProgramCache]: Analyzing trace with hash -687460973, now seen corresponding path program 5 times [2019-11-25 08:53:25,940 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:53:25,940 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210617012] [2019-11-25 08:53:25,940 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:53:25,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:25,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:26,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:26,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:26,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:26,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:26,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:26,178 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-11-25 08:53:26,178 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210617012] [2019-11-25 08:53:26,179 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097740088] [2019-11-25 08:53:26,179 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_477c4ca5-7c4b-480d-91b7-d7fbac317280/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:53:26,236 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-25 08:53:26,237 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:53:26,238 INFO L255 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-25 08:53:26,241 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:53:26,278 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-11-25 08:53:26,279 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:53:26,279 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 13 [2019-11-25 08:53:26,279 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963069276] [2019-11-25 08:53:26,283 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-25 08:53:26,284 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:53:26,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-25 08:53:26,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2019-11-25 08:53:26,285 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 13 states. [2019-11-25 08:53:26,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:53:26,441 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2019-11-25 08:53:26,442 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-25 08:53:26,442 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 39 [2019-11-25 08:53:26,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:53:26,443 INFO L225 Difference]: With dead ends: 33 [2019-11-25 08:53:26,443 INFO L226 Difference]: Without dead ends: 29 [2019-11-25 08:53:26,444 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2019-11-25 08:53:26,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-25 08:53:26,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-11-25 08:53:26,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-25 08:53:26,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2019-11-25 08:53:26,451 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 39 [2019-11-25 08:53:26,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:53:26,453 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2019-11-25 08:53:26,453 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-25 08:53:26,453 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2019-11-25 08:53:26,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-25 08:53:26,454 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:53:26,455 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:53:26,655 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:53:26,656 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:53:26,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:53:26,656 INFO L82 PathProgramCache]: Analyzing trace with hash 547744169, now seen corresponding path program 6 times [2019-11-25 08:53:26,656 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:53:26,656 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662126265] [2019-11-25 08:53:26,656 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:53:26,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:26,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:26,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:26,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:26,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:26,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:26,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:26,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:26,890 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-25 08:53:26,890 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662126265] [2019-11-25 08:53:26,890 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027640032] [2019-11-25 08:53:26,891 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_477c4ca5-7c4b-480d-91b7-d7fbac317280/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:53:26,943 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-25 08:53:26,944 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:53:26,945 INFO L255 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-25 08:53:26,947 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:53:26,998 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-25 08:53:26,998 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:53:26,998 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 14 [2019-11-25 08:53:26,999 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450352296] [2019-11-25 08:53:26,999 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-25 08:53:26,999 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:53:27,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-25 08:53:27,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-11-25 08:53:27,000 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 14 states. [2019-11-25 08:53:27,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:53:27,144 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2019-11-25 08:53:27,144 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-25 08:53:27,145 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 45 [2019-11-25 08:53:27,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:53:27,146 INFO L225 Difference]: With dead ends: 36 [2019-11-25 08:53:27,146 INFO L226 Difference]: Without dead ends: 32 [2019-11-25 08:53:27,147 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2019-11-25 08:53:27,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-25 08:53:27,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-11-25 08:53:27,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-25 08:53:27,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2019-11-25 08:53:27,152 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 45 [2019-11-25 08:53:27,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:53:27,155 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2019-11-25 08:53:27,155 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-25 08:53:27,155 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2019-11-25 08:53:27,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-25 08:53:27,163 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:53:27,168 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:53:27,372 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:53:27,372 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:53:27,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:53:27,373 INFO L82 PathProgramCache]: Analyzing trace with hash -247823213, now seen corresponding path program 7 times [2019-11-25 08:53:27,373 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:53:27,373 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014205207] [2019-11-25 08:53:27,373 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:53:27,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:27,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:27,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:27,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:27,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:27,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:27,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:27,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:27,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:27,596 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-11-25 08:53:27,597 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014205207] [2019-11-25 08:53:27,597 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922814603] [2019-11-25 08:53:27,597 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_477c4ca5-7c4b-480d-91b7-d7fbac317280/bin/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:53:27,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:27,636 INFO L255 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-25 08:53:27,638 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:53:27,687 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-11-25 08:53:27,687 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:53:27,687 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 15 [2019-11-25 08:53:27,688 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169649623] [2019-11-25 08:53:27,689 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-25 08:53:27,689 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:53:27,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-25 08:53:27,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2019-11-25 08:53:27,692 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 15 states. [2019-11-25 08:53:27,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:53:27,849 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2019-11-25 08:53:27,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-25 08:53:27,850 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 51 [2019-11-25 08:53:27,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:53:27,851 INFO L225 Difference]: With dead ends: 39 [2019-11-25 08:53:27,851 INFO L226 Difference]: Without dead ends: 35 [2019-11-25 08:53:27,852 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=152, Invalid=354, Unknown=0, NotChecked=0, Total=506 [2019-11-25 08:53:27,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-25 08:53:27,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2019-11-25 08:53:27,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-25 08:53:27,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2019-11-25 08:53:27,859 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 51 [2019-11-25 08:53:27,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:53:27,860 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2019-11-25 08:53:27,860 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-25 08:53:27,860 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2019-11-25 08:53:27,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-11-25 08:53:27,863 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:53:27,863 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:53:28,064 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:53:28,065 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:53:28,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:53:28,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1818636247, now seen corresponding path program 8 times [2019-11-25 08:53:28,065 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:53:28,065 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189817951] [2019-11-25 08:53:28,066 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:53:28,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:28,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:28,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:28,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:28,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:28,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:28,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:28,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:28,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:28,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:28,369 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-25 08:53:28,370 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189817951] [2019-11-25 08:53:28,370 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053331901] [2019-11-25 08:53:28,370 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_477c4ca5-7c4b-480d-91b7-d7fbac317280/bin/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:53:28,417 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-25 08:53:28,417 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:53:28,418 INFO L255 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-25 08:53:28,421 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:53:28,453 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-25 08:53:28,454 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:53:28,454 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 16 [2019-11-25 08:53:28,456 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30716452] [2019-11-25 08:53:28,457 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-25 08:53:28,457 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:53:28,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-25 08:53:28,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2019-11-25 08:53:28,458 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 16 states. [2019-11-25 08:53:28,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:53:28,640 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2019-11-25 08:53:28,641 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-25 08:53:28,641 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 57 [2019-11-25 08:53:28,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:53:28,642 INFO L225 Difference]: With dead ends: 42 [2019-11-25 08:53:28,642 INFO L226 Difference]: Without dead ends: 38 [2019-11-25 08:53:28,643 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=183, Invalid=417, Unknown=0, NotChecked=0, Total=600 [2019-11-25 08:53:28,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-11-25 08:53:28,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-11-25 08:53:28,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-11-25 08:53:28,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2019-11-25 08:53:28,648 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 57 [2019-11-25 08:53:28,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:53:28,651 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2019-11-25 08:53:28,651 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-25 08:53:28,651 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2019-11-25 08:53:28,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-11-25 08:53:28,655 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:53:28,655 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:53:28,855 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:53:28,855 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:53:28,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:53:28,856 INFO L82 PathProgramCache]: Analyzing trace with hash -2055304301, now seen corresponding path program 9 times [2019-11-25 08:53:28,856 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:53:28,856 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963552333] [2019-11-25 08:53:28,856 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:53:28,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:28,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:28,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:28,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:29,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:29,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:29,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:29,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:29,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:29,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:29,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:29,233 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2019-11-25 08:53:29,233 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963552333] [2019-11-25 08:53:29,234 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485153160] [2019-11-25 08:53:29,234 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_477c4ca5-7c4b-480d-91b7-d7fbac317280/bin/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:53:29,298 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-11-25 08:53:29,299 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:53:29,300 INFO L255 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-25 08:53:29,303 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:53:29,350 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2019-11-25 08:53:29,350 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:53:29,350 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 17 [2019-11-25 08:53:29,351 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360528281] [2019-11-25 08:53:29,352 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-25 08:53:29,352 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:53:29,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-25 08:53:29,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2019-11-25 08:53:29,353 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 17 states. [2019-11-25 08:53:29,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:53:29,552 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2019-11-25 08:53:29,553 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-25 08:53:29,553 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 63 [2019-11-25 08:53:29,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:53:29,554 INFO L225 Difference]: With dead ends: 45 [2019-11-25 08:53:29,554 INFO L226 Difference]: Without dead ends: 41 [2019-11-25 08:53:29,555 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=217, Invalid=485, Unknown=0, NotChecked=0, Total=702 [2019-11-25 08:53:29,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-25 08:53:29,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2019-11-25 08:53:29,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-11-25 08:53:29,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2019-11-25 08:53:29,561 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 63 [2019-11-25 08:53:29,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:53:29,561 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2019-11-25 08:53:29,561 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-25 08:53:29,562 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2019-11-25 08:53:29,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-11-25 08:53:29,562 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:53:29,563 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:53:29,763 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:53:29,763 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:53:29,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:53:29,764 INFO L82 PathProgramCache]: Analyzing trace with hash -1172322647, now seen corresponding path program 10 times [2019-11-25 08:53:29,764 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:53:29,764 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671369779] [2019-11-25 08:53:29,764 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:53:29,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:29,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:29,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:29,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:29,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:29,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:29,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:29,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:30,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:30,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:30,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:30,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:30,155 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2019-11-25 08:53:30,156 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671369779] [2019-11-25 08:53:30,156 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048193326] [2019-11-25 08:53:30,156 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_477c4ca5-7c4b-480d-91b7-d7fbac317280/bin/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:53:30,208 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-25 08:53:30,209 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:53:30,210 INFO L255 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-25 08:53:30,212 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:53:30,257 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2019-11-25 08:53:30,258 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:53:30,258 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 18 [2019-11-25 08:53:30,258 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869200727] [2019-11-25 08:53:30,260 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-25 08:53:30,260 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:53:30,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-25 08:53:30,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2019-11-25 08:53:30,261 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 18 states. [2019-11-25 08:53:30,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:53:30,432 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2019-11-25 08:53:30,432 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-25 08:53:30,432 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 69 [2019-11-25 08:53:30,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:53:30,433 INFO L225 Difference]: With dead ends: 48 [2019-11-25 08:53:30,433 INFO L226 Difference]: Without dead ends: 44 [2019-11-25 08:53:30,434 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=254, Invalid=558, Unknown=0, NotChecked=0, Total=812 [2019-11-25 08:53:30,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-11-25 08:53:30,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-11-25 08:53:30,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-25 08:53:30,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2019-11-25 08:53:30,439 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 69 [2019-11-25 08:53:30,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:53:30,440 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2019-11-25 08:53:30,440 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-25 08:53:30,443 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2019-11-25 08:53:30,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-11-25 08:53:30,445 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:53:30,445 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:53:30,645 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:53:30,646 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:53:30,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:53:30,646 INFO L82 PathProgramCache]: Analyzing trace with hash -1452916077, now seen corresponding path program 11 times [2019-11-25 08:53:30,646 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:53:30,646 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743955402] [2019-11-25 08:53:30,646 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:53:30,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:30,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:30,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:30,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:30,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:30,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:30,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:30,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:30,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:30,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:30,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:31,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:31,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:31,077 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-11-25 08:53:31,077 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743955402] [2019-11-25 08:53:31,078 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727269965] [2019-11-25 08:53:31,078 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_477c4ca5-7c4b-480d-91b7-d7fbac317280/bin/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:53:31,150 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-11-25 08:53:31,150 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:53:31,152 INFO L255 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-25 08:53:31,154 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:53:31,198 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-11-25 08:53:31,199 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:53:31,199 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 19 [2019-11-25 08:53:31,199 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064405642] [2019-11-25 08:53:31,200 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-25 08:53:31,200 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:53:31,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-25 08:53:31,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2019-11-25 08:53:31,201 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 19 states. [2019-11-25 08:53:31,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:53:31,448 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2019-11-25 08:53:31,449 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-25 08:53:31,449 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 75 [2019-11-25 08:53:31,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:53:31,450 INFO L225 Difference]: With dead ends: 51 [2019-11-25 08:53:31,450 INFO L226 Difference]: Without dead ends: 47 [2019-11-25 08:53:31,451 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=294, Invalid=636, Unknown=0, NotChecked=0, Total=930 [2019-11-25 08:53:31,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-11-25 08:53:31,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2019-11-25 08:53:31,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-11-25 08:53:31,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2019-11-25 08:53:31,458 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 75 [2019-11-25 08:53:31,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:53:31,458 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2019-11-25 08:53:31,458 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-25 08:53:31,458 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2019-11-25 08:53:31,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-11-25 08:53:31,459 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:53:31,460 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:53:31,660 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:53:31,660 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:53:31,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:53:31,661 INFO L82 PathProgramCache]: Analyzing trace with hash -461124311, now seen corresponding path program 12 times [2019-11-25 08:53:31,661 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:53:31,661 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192580957] [2019-11-25 08:53:31,661 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:53:31,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:31,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:31,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:31,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:31,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:31,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:31,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:31,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:31,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:31,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:31,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:32,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:32,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:32,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:32,107 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2019-11-25 08:53:32,107 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192580957] [2019-11-25 08:53:32,108 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289126966] [2019-11-25 08:53:32,108 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_477c4ca5-7c4b-480d-91b7-d7fbac317280/bin/uautomizer/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:53:32,159 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-11-25 08:53:32,160 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:53:32,161 INFO L255 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 28 conjunts are in the unsatisfiable core [2019-11-25 08:53:32,163 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:53:32,213 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2019-11-25 08:53:32,213 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:53:32,214 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 20 [2019-11-25 08:53:32,214 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542855566] [2019-11-25 08:53:32,215 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-25 08:53:32,215 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:53:32,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-25 08:53:32,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=264, Unknown=0, NotChecked=0, Total=380 [2019-11-25 08:53:32,217 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 20 states. [2019-11-25 08:53:32,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:53:32,462 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2019-11-25 08:53:32,462 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-25 08:53:32,462 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 81 [2019-11-25 08:53:32,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:53:32,463 INFO L225 Difference]: With dead ends: 54 [2019-11-25 08:53:32,463 INFO L226 Difference]: Without dead ends: 50 [2019-11-25 08:53:32,464 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=337, Invalid=719, Unknown=0, NotChecked=0, Total=1056 [2019-11-25 08:53:32,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-11-25 08:53:32,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2019-11-25 08:53:32,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-25 08:53:32,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2019-11-25 08:53:32,475 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 81 [2019-11-25 08:53:32,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:53:32,476 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2019-11-25 08:53:32,476 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-25 08:53:32,476 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2019-11-25 08:53:32,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-11-25 08:53:32,477 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:53:32,477 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:53:32,678 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:53:32,678 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:53:32,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:53:32,678 INFO L82 PathProgramCache]: Analyzing trace with hash -1887065709, now seen corresponding path program 13 times [2019-11-25 08:53:32,678 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:53:32,678 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402830122] [2019-11-25 08:53:32,678 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:53:32,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:32,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:32,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:32,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:32,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:32,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:32,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:32,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:32,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:33,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:33,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:33,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:33,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:33,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:33,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:33,213 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2019-11-25 08:53:33,217 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402830122] [2019-11-25 08:53:33,217 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607365194] [2019-11-25 08:53:33,217 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_477c4ca5-7c4b-480d-91b7-d7fbac317280/bin/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:53:33,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:33,277 INFO L255 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 30 conjunts are in the unsatisfiable core [2019-11-25 08:53:33,281 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:53:33,327 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2019-11-25 08:53:33,328 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:53:33,328 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 21 [2019-11-25 08:53:33,329 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064674549] [2019-11-25 08:53:33,331 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-25 08:53:33,331 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:53:33,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-25 08:53:33,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=289, Unknown=0, NotChecked=0, Total=420 [2019-11-25 08:53:33,332 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 21 states. [2019-11-25 08:53:33,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:53:33,587 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2019-11-25 08:53:33,587 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-25 08:53:33,587 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 87 [2019-11-25 08:53:33,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:53:33,588 INFO L225 Difference]: With dead ends: 57 [2019-11-25 08:53:33,588 INFO L226 Difference]: Without dead ends: 53 [2019-11-25 08:53:33,589 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=383, Invalid=807, Unknown=0, NotChecked=0, Total=1190 [2019-11-25 08:53:33,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-11-25 08:53:33,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2019-11-25 08:53:33,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-11-25 08:53:33,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2019-11-25 08:53:33,594 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 87 [2019-11-25 08:53:33,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:53:33,595 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2019-11-25 08:53:33,595 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-25 08:53:33,595 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2019-11-25 08:53:33,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-11-25 08:53:33,596 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:53:33,596 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:53:33,803 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:53:33,803 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:53:33,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:53:33,804 INFO L82 PathProgramCache]: Analyzing trace with hash -1777212503, now seen corresponding path program 14 times [2019-11-25 08:53:33,804 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:53:33,804 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998428974] [2019-11-25 08:53:33,804 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:53:33,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:33,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:33,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:33,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:33,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:33,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:33,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:34,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:34,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:34,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:34,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:34,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:34,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:34,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:34,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:34,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:34,304 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2019-11-25 08:53:34,305 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998428974] [2019-11-25 08:53:34,305 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163305755] [2019-11-25 08:53:34,305 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_477c4ca5-7c4b-480d-91b7-d7fbac317280/bin/uautomizer/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:53:34,369 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-25 08:53:34,369 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:53:34,371 INFO L255 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 32 conjunts are in the unsatisfiable core [2019-11-25 08:53:34,373 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:53:34,410 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2019-11-25 08:53:34,411 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:53:34,411 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 22 [2019-11-25 08:53:34,412 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854602479] [2019-11-25 08:53:34,412 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-25 08:53:34,412 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:53:34,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-25 08:53:34,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=315, Unknown=0, NotChecked=0, Total=462 [2019-11-25 08:53:34,413 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 22 states. [2019-11-25 08:53:34,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:53:34,653 INFO L93 Difference]: Finished difference Result 60 states and 61 transitions. [2019-11-25 08:53:34,654 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-25 08:53:34,654 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 93 [2019-11-25 08:53:34,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:53:34,655 INFO L225 Difference]: With dead ends: 60 [2019-11-25 08:53:34,655 INFO L226 Difference]: Without dead ends: 56 [2019-11-25 08:53:34,656 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=432, Invalid=900, Unknown=0, NotChecked=0, Total=1332 [2019-11-25 08:53:34,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-11-25 08:53:34,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2019-11-25 08:53:34,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-11-25 08:53:34,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2019-11-25 08:53:34,662 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 93 [2019-11-25 08:53:34,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:53:34,662 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2019-11-25 08:53:34,662 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-25 08:53:34,663 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2019-11-25 08:53:34,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-11-25 08:53:34,664 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:53:34,664 INFO L410 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:53:34,864 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:53:34,864 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:53:34,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:53:34,865 INFO L82 PathProgramCache]: Analyzing trace with hash -948911981, now seen corresponding path program 15 times [2019-11-25 08:53:34,865 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:53:34,865 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840994418] [2019-11-25 08:53:34,865 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:53:34,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:53:34,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:53:34,911 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-25 08:53:34,911 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-25 08:53:34,973 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 08:53:34 BoogieIcfgContainer [2019-11-25 08:53:34,973 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-25 08:53:34,974 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-25 08:53:34,974 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-25 08:53:34,974 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-25 08:53:34,974 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:53:22" (3/4) ... [2019-11-25 08:53:34,976 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-25 08:53:35,039 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_477c4ca5-7c4b-480d-91b7-d7fbac317280/bin/uautomizer/witness.graphml [2019-11-25 08:53:35,039 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-25 08:53:35,041 INFO L168 Benchmark]: Toolchain (without parser) took 12608.87 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 298.3 MB). Free memory was 950.1 MB in the beginning and 809.6 MB in the end (delta: 140.5 MB). Peak memory consumption was 438.8 MB. Max. memory is 11.5 GB. [2019-11-25 08:53:35,042 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-25 08:53:35,042 INFO L168 Benchmark]: CACSL2BoogieTranslator took 309.42 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 125.8 MB). Free memory was 950.1 MB in the beginning and 1.1 GB in the end (delta: -170.0 MB). Peak memory consumption was 22.9 MB. Max. memory is 11.5 GB. [2019-11-25 08:53:35,042 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.40 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. [2019-11-25 08:53:35,042 INFO L168 Benchmark]: Boogie Preprocessor took 11.64 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. [2019-11-25 08:53:35,043 INFO L168 Benchmark]: RCFGBuilder took 197.17 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 18.8 MB). Peak memory consumption was 18.8 MB. Max. memory is 11.5 GB. [2019-11-25 08:53:35,043 INFO L168 Benchmark]: TraceAbstraction took 11991.52 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 172.5 MB). Free memory was 1.1 GB in the beginning and 811.5 MB in the end (delta: 289.7 MB). Peak memory consumption was 462.2 MB. Max. memory is 11.5 GB. [2019-11-25 08:53:35,044 INFO L168 Benchmark]: Witness Printer took 65.78 ms. Allocated memory is still 1.3 GB. Free memory was 811.5 MB in the beginning and 809.6 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 11.5 GB. [2019-11-25 08:53:35,045 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 309.42 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 125.8 MB). Free memory was 950.1 MB in the beginning and 1.1 GB in the end (delta: -170.0 MB). Peak memory consumption was 22.9 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 27.40 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. * Boogie Preprocessor took 11.64 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. * RCFGBuilder took 197.17 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 18.8 MB). Peak memory consumption was 18.8 MB. Max. memory is 11.5 GB. * TraceAbstraction took 11991.52 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 172.5 MB). Free memory was 1.1 GB in the beginning and 811.5 MB in the end (delta: 289.7 MB). Peak memory consumption was 462.2 MB. Max. memory is 11.5 GB. * Witness Printer took 65.78 ms. Allocated memory is still 1.3 GB. Free memory was 811.5 MB in the beginning and 809.6 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 16]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int a = 15; [L13] int b = 0; [L14] CALL, EXPR sum(a, b) VAL [\old(m)=0, \old(n)=15] [L4] COND FALSE !(n <= 0) VAL [\old(m)=0, \old(n)=15, m=0, n=15] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=1, \old(n)=14] [L4] COND FALSE !(n <= 0) VAL [\old(m)=1, \old(n)=14, m=1, n=14] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=2, \old(n)=13] [L4] COND FALSE !(n <= 0) VAL [\old(m)=2, \old(n)=13, m=2, n=13] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=3, \old(n)=12] [L4] COND FALSE !(n <= 0) VAL [\old(m)=3, \old(n)=12, m=3, n=12] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=4, \old(n)=11] [L4] COND FALSE !(n <= 0) VAL [\old(m)=4, \old(n)=11, m=4, n=11] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=5, \old(n)=10] [L4] COND FALSE !(n <= 0) VAL [\old(m)=5, \old(n)=10, m=5, n=10] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=6, \old(n)=9] [L4] COND FALSE !(n <= 0) VAL [\old(m)=6, \old(n)=9, m=6, n=9] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=7, \old(n)=8] [L4] COND FALSE !(n <= 0) VAL [\old(m)=7, \old(n)=8, m=7, n=8] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=8, \old(n)=7] [L4] COND FALSE !(n <= 0) VAL [\old(m)=8, \old(n)=7, m=8, n=7] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=9, \old(n)=6] [L4] COND FALSE !(n <= 0) VAL [\old(m)=9, \old(n)=6, m=9, n=6] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=10, \old(n)=5] [L4] COND FALSE !(n <= 0) VAL [\old(m)=10, \old(n)=5, m=10, n=5] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=11, \old(n)=4] [L4] COND FALSE !(n <= 0) VAL [\old(m)=11, \old(n)=4, m=11, n=4] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=12, \old(n)=3] [L4] COND FALSE !(n <= 0) VAL [\old(m)=12, \old(n)=3, m=12, n=3] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=13, \old(n)=2] [L4] COND FALSE !(n <= 0) VAL [\old(m)=13, \old(n)=2, m=13, n=2] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=14, \old(n)=1] [L4] COND FALSE !(n <= 0) VAL [\old(m)=14, \old(n)=1, m=14, n=1] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=15, \old(n)=0] [L4] COND TRUE n <= 0 [L5] return m + n; VAL [\old(m)=15, \old(n)=0, \result=15, m=15, n=0] [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=14, \old(n)=1, m=14, n=1, sum(n - 1, m + 1)=15] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=13, \old(n)=2, m=13, n=2, sum(n - 1, m + 1)=15] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=12, \old(n)=3, m=12, n=3, sum(n - 1, m + 1)=15] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=11, \old(n)=4, m=11, n=4, sum(n - 1, m + 1)=15] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=10, \old(n)=5, m=10, n=5, sum(n - 1, m + 1)=15] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=9, \old(n)=6, m=9, n=6, sum(n - 1, m + 1)=15] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=8, \old(n)=7, m=8, n=7, sum(n - 1, m + 1)=15] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=7, \old(n)=8, m=7, n=8, sum(n - 1, m + 1)=15] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=6, \old(n)=9, m=6, n=9, sum(n - 1, m + 1)=15] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=5, \old(n)=10, m=5, n=10, sum(n - 1, m + 1)=15] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=4, \old(n)=11, m=4, n=11, sum(n - 1, m + 1)=15] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=3, \old(n)=12, m=3, n=12, sum(n - 1, m + 1)=15] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=2, \old(n)=13, m=2, n=13, sum(n - 1, m + 1)=15] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=1, \old(n)=14, m=1, n=14, sum(n - 1, m + 1)=15] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=0, \old(n)=15, m=0, n=15, sum(n - 1, m + 1)=15] [L7] return sum(n - 1, m + 1); [L14] RET, EXPR sum(a, b) [L14] int result = sum(a, b); [L15] COND TRUE result == a + b [L16] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 15 locations, 1 error locations. Result: UNSAFE, OverallTime: 11.9s, OverallIterations: 16, TraceHistogramMax: 16, AutomataDifference: 2.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 122 SDtfs, 447 SDslu, 647 SDs, 0 SdLazy, 830 SolverSat, 96 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1282 GetRequests, 968 SyntacticMatches, 0 SemanticMatches, 314 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1120 ImplicationChecksByTransitivity, 4.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=56occurred in iteration=15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 15 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 5.0s InterpolantComputationTime, 1620 NumberOfCodeBlocks, 1620 NumberOfCodeBlocksAsserted, 81 NumberOfCheckSat, 1492 ConstructedInterpolants, 0 QuantifiedInterpolants, 254632 SizeOfPredicates, 133 NumberOfNonLiveVariables, 2296 ConjunctsInSsa, 266 ConjunctsInUnsatCore, 29 InterpolantComputations, 1 PerfectInterpolantSequences, 3150/6300 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...