./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 678e0110 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_a6533db5-ee9f-4d8d-9ecb-45b130e88e81/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_a6533db5-ee9f-4d8d-9ecb-45b130e88e81/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_a6533db5-ee9f-4d8d-9ecb-45b130e88e81/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_a6533db5-ee9f-4d8d-9ecb-45b130e88e81/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/sum_15x0-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_a6533db5-ee9f-4d8d-9ecb-45b130e88e81/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_a6533db5-ee9f-4d8d-9ecb-45b130e88e81/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 0.1.24-678e011 [2019-11-20 03:33:14,898 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-20 03:33:14,901 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-20 03:33:14,912 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-20 03:33:14,913 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-20 03:33:14,914 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-20 03:33:14,916 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-20 03:33:14,918 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-20 03:33:14,921 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-20 03:33:14,922 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-20 03:33:14,924 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-20 03:33:14,925 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-20 03:33:14,926 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-20 03:33:14,927 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-20 03:33:14,929 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-20 03:33:14,930 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-20 03:33:14,931 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-20 03:33:14,933 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-20 03:33:14,935 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-20 03:33:14,939 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-20 03:33:14,941 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-20 03:33:14,942 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-20 03:33:14,944 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-20 03:33:14,945 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-20 03:33:14,948 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-20 03:33:14,948 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-20 03:33:14,949 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-20 03:33:14,950 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-20 03:33:14,950 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-20 03:33:14,952 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-20 03:33:14,952 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-20 03:33:14,953 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-20 03:33:14,954 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-20 03:33:14,954 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-20 03:33:14,956 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-20 03:33:14,956 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-20 03:33:14,957 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-20 03:33:14,957 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-20 03:33:14,958 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-20 03:33:14,959 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-20 03:33:14,959 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-20 03:33:14,960 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_a6533db5-ee9f-4d8d-9ecb-45b130e88e81/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-20 03:33:14,976 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-20 03:33:14,976 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-20 03:33:14,978 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-20 03:33:14,978 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-20 03:33:14,978 INFO L138 SettingsManager]: * Use SBE=true [2019-11-20 03:33:14,978 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-20 03:33:14,979 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-20 03:33:14,979 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-20 03:33:14,979 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-20 03:33:14,980 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-20 03:33:14,980 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-20 03:33:14,980 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-20 03:33:14,980 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-20 03:33:14,981 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-20 03:33:14,981 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-20 03:33:14,981 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-20 03:33:14,981 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-20 03:33:14,982 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-20 03:33:14,982 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-20 03:33:14,982 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-20 03:33:14,983 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-20 03:33:14,983 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-20 03:33:14,983 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-20 03:33:14,983 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-20 03:33:14,984 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-20 03:33:14,984 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-20 03:33:14,984 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-20 03:33:14,985 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-20 03:33:14,985 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_a6533db5-ee9f-4d8d-9ecb-45b130e88e81/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 [2019-11-20 03:33:15,153 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-20 03:33:15,168 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-20 03:33:15,172 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-20 03:33:15,174 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-20 03:33:15,175 INFO L275 PluginConnector]: CDTParser initialized [2019-11-20 03:33:15,175 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_a6533db5-ee9f-4d8d-9ecb-45b130e88e81/bin/uautomizer/../../sv-benchmarks/c/recursive-simple/sum_15x0-2.c [2019-11-20 03:33:15,244 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a6533db5-ee9f-4d8d-9ecb-45b130e88e81/bin/uautomizer/data/35341ef8d/d4b10e81ef0c4d71b4392c330969a6a9/FLAG477f2a7b7 [2019-11-20 03:33:15,697 INFO L306 CDTParser]: Found 1 translation units. [2019-11-20 03:33:15,698 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_a6533db5-ee9f-4d8d-9ecb-45b130e88e81/sv-benchmarks/c/recursive-simple/sum_15x0-2.c [2019-11-20 03:33:15,705 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a6533db5-ee9f-4d8d-9ecb-45b130e88e81/bin/uautomizer/data/35341ef8d/d4b10e81ef0c4d71b4392c330969a6a9/FLAG477f2a7b7 [2019-11-20 03:33:16,050 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_a6533db5-ee9f-4d8d-9ecb-45b130e88e81/bin/uautomizer/data/35341ef8d/d4b10e81ef0c4d71b4392c330969a6a9 [2019-11-20 03:33:16,053 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-20 03:33:16,055 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-20 03:33:16,056 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-20 03:33:16,056 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-20 03:33:16,060 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-20 03:33:16,061 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 03:33:16" (1/1) ... [2019-11-20 03:33:16,064 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2cd5c1ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:33:16, skipping insertion in model container [2019-11-20 03:33:16,065 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 03:33:16" (1/1) ... [2019-11-20 03:33:16,073 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-20 03:33:16,090 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-20 03:33:16,250 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 03:33:16,254 INFO L188 MainTranslator]: Completed pre-run [2019-11-20 03:33:16,267 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 03:33:16,358 INFO L192 MainTranslator]: Completed translation [2019-11-20 03:33:16,359 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:33:16 WrapperNode [2019-11-20 03:33:16,359 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-20 03:33:16,362 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-20 03:33:16,362 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-20 03:33:16,362 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-20 03:33:16,373 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:33:16" (1/1) ... [2019-11-20 03:33:16,380 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:33:16" (1/1) ... [2019-11-20 03:33:16,399 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-20 03:33:16,401 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-20 03:33:16,402 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-20 03:33:16,402 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-20 03:33:16,414 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:33:16" (1/1) ... [2019-11-20 03:33:16,422 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:33:16" (1/1) ... [2019-11-20 03:33:16,423 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:33:16" (1/1) ... [2019-11-20 03:33:16,424 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:33:16" (1/1) ... [2019-11-20 03:33:16,426 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:33:16" (1/1) ... [2019-11-20 03:33:16,428 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:33:16" (1/1) ... [2019-11-20 03:33:16,429 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:33:16" (1/1) ... [2019-11-20 03:33:16,431 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-20 03:33:16,432 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-20 03:33:16,433 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-20 03:33:16,433 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-20 03:33:16,435 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:33:16" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a6533db5-ee9f-4d8d-9ecb-45b130e88e81/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 [2019-11-20 03:33:16,518 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-20 03:33:16,518 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-20 03:33:16,519 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2019-11-20 03:33:16,519 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2019-11-20 03:33:16,728 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-20 03:33:16,728 INFO L285 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-20 03:33:16,729 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 03:33:16 BoogieIcfgContainer [2019-11-20 03:33:16,729 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-20 03:33:16,730 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-20 03:33:16,731 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-20 03:33:16,735 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-20 03:33:16,735 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 03:33:16" (1/3) ... [2019-11-20 03:33:16,737 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5991307f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 03:33:16, skipping insertion in model container [2019-11-20 03:33:16,737 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:33:16" (2/3) ... [2019-11-20 03:33:16,738 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5991307f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 03:33:16, skipping insertion in model container [2019-11-20 03:33:16,738 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 03:33:16" (3/3) ... [2019-11-20 03:33:16,740 INFO L109 eAbstractionObserver]: Analyzing ICFG sum_15x0-2.c [2019-11-20 03:33:16,751 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-20 03:33:16,759 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-20 03:33:16,773 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-20 03:33:16,800 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-20 03:33:16,800 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-20 03:33:16,801 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-20 03:33:16,801 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-20 03:33:16,801 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-20 03:33:16,801 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-20 03:33:16,801 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-20 03:33:16,802 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-20 03:33:16,821 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2019-11-20 03:33:16,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-20 03:33:16,827 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:33:16,828 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 03:33:16,829 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:33:16,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:33:16,836 INFO L82 PathProgramCache]: Analyzing trace with hash 389977641, now seen corresponding path program 1 times [2019-11-20 03:33:16,846 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 03:33:16,847 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903442196] [2019-11-20 03:33:16,847 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 03:33:16,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:17,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:17,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 03:33:17,247 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903442196] [2019-11-20 03:33:17,248 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 03:33:17,248 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-20 03:33:17,250 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113069963] [2019-11-20 03:33:17,258 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-20 03:33:17,259 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 03:33:17,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-20 03:33:17,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-20 03:33:17,278 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 7 states. [2019-11-20 03:33:17,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:33:17,403 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2019-11-20 03:33:17,403 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-20 03:33:17,404 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 9 [2019-11-20 03:33:17,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:33:17,413 INFO L225 Difference]: With dead ends: 24 [2019-11-20 03:33:17,413 INFO L226 Difference]: Without dead ends: 14 [2019-11-20 03:33:17,417 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 [2019-11-20 03:33:17,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-11-20 03:33:17,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-11-20 03:33:17,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-20 03:33:17,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2019-11-20 03:33:17,457 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9 [2019-11-20 03:33:17,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:33:17,458 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2019-11-20 03:33:17,458 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-20 03:33:17,458 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2019-11-20 03:33:17,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-20 03:33:17,460 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:33:17,460 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 03:33:17,460 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:33:17,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:33:17,461 INFO L82 PathProgramCache]: Analyzing trace with hash -881029229, now seen corresponding path program 1 times [2019-11-20 03:33:17,461 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 03:33:17,461 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060208671] [2019-11-20 03:33:17,461 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 03:33:17,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:17,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:17,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:17,648 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-20 03:33:17,651 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060208671] [2019-11-20 03:33:17,651 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173131547] [2019-11-20 03:33:17,652 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a6533db5-ee9f-4d8d-9ecb-45b130e88e81/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 [2019-11-20 03:33:17,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:17,731 INFO L255 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-20 03:33:17,737 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:33:17,844 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-20 03:33:17,844 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 03:33:17,844 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 9 [2019-11-20 03:33:17,846 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356393173] [2019-11-20 03:33:17,847 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-20 03:33:17,847 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 03:33:17,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-20 03:33:17,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2019-11-20 03:33:17,848 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 9 states. [2019-11-20 03:33:17,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:33:17,972 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2019-11-20 03:33:17,973 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-20 03:33:17,973 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2019-11-20 03:33:17,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:33:17,974 INFO L225 Difference]: With dead ends: 21 [2019-11-20 03:33:17,974 INFO L226 Difference]: Without dead ends: 17 [2019-11-20 03:33:17,975 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 [2019-11-20 03:33:17,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-20 03:33:17,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-11-20 03:33:17,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-20 03:33:17,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2019-11-20 03:33:17,982 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2019-11-20 03:33:17,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:33:17,983 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2019-11-20 03:33:17,983 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-20 03:33:17,983 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2019-11-20 03:33:17,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-20 03:33:17,984 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:33:17,984 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 03:33:18,188 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:33:18,188 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:33:18,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:33:18,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1824240471, now seen corresponding path program 2 times [2019-11-20 03:33:18,189 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 03:33:18,189 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697845083] [2019-11-20 03:33:18,189 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 03:33:18,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:18,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:18,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:18,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:18,397 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-20 03:33:18,398 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697845083] [2019-11-20 03:33:18,398 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026096862] [2019-11-20 03:33:18,399 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a6533db5-ee9f-4d8d-9ecb-45b130e88e81/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 [2019-11-20 03:33:18,458 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 03:33:18,458 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 03:33:18,459 INFO L255 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-20 03:33:18,462 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:33:18,510 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-20 03:33:18,511 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 03:33:18,511 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 10 [2019-11-20 03:33:18,511 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607893850] [2019-11-20 03:33:18,512 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-20 03:33:18,512 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 03:33:18,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-20 03:33:18,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2019-11-20 03:33:18,513 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 10 states. [2019-11-20 03:33:18,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:33:18,621 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2019-11-20 03:33:18,622 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-20 03:33:18,622 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 21 [2019-11-20 03:33:18,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:33:18,623 INFO L225 Difference]: With dead ends: 24 [2019-11-20 03:33:18,624 INFO L226 Difference]: Without dead ends: 20 [2019-11-20 03:33:18,624 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 [2019-11-20 03:33:18,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-20 03:33:18,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-11-20 03:33:18,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-20 03:33:18,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2019-11-20 03:33:18,631 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 21 [2019-11-20 03:33:18,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:33:18,632 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2019-11-20 03:33:18,632 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-20 03:33:18,632 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2019-11-20 03:33:18,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-20 03:33:18,633 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:33:18,634 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 03:33:18,837 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:33:18,838 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:33:18,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:33:18,838 INFO L82 PathProgramCache]: Analyzing trace with hash -28473709, now seen corresponding path program 3 times [2019-11-20 03:33:18,838 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 03:33:18,839 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448981475] [2019-11-20 03:33:18,839 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 03:33:18,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:18,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:19,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:19,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:19,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:19,097 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-20 03:33:19,098 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448981475] [2019-11-20 03:33:19,098 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976771071] [2019-11-20 03:33:19,098 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a6533db5-ee9f-4d8d-9ecb-45b130e88e81/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 [2019-11-20 03:33:19,164 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-20 03:33:19,164 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 03:33:19,165 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-20 03:33:19,169 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:33:19,214 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-20 03:33:19,215 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 03:33:19,215 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 11 [2019-11-20 03:33:19,216 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001543203] [2019-11-20 03:33:19,217 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-20 03:33:19,217 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 03:33:19,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-20 03:33:19,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2019-11-20 03:33:19,218 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 11 states. [2019-11-20 03:33:19,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:33:19,363 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2019-11-20 03:33:19,364 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-20 03:33:19,364 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 27 [2019-11-20 03:33:19,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:33:19,365 INFO L225 Difference]: With dead ends: 27 [2019-11-20 03:33:19,365 INFO L226 Difference]: Without dead ends: 23 [2019-11-20 03:33:19,366 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 [2019-11-20 03:33:19,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-20 03:33:19,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-11-20 03:33:19,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-20 03:33:19,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2019-11-20 03:33:19,372 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 27 [2019-11-20 03:33:19,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:33:19,374 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2019-11-20 03:33:19,374 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-20 03:33:19,374 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2019-11-20 03:33:19,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-20 03:33:19,377 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:33:19,378 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 03:33:19,591 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:33:19,592 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:33:19,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:33:19,592 INFO L82 PathProgramCache]: Analyzing trace with hash -2080894167, now seen corresponding path program 4 times [2019-11-20 03:33:19,592 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 03:33:19,593 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148441387] [2019-11-20 03:33:19,593 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 03:33:19,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:19,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:19,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:19,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:19,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:19,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:19,941 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-11-20 03:33:19,943 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148441387] [2019-11-20 03:33:19,943 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211956301] [2019-11-20 03:33:19,943 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a6533db5-ee9f-4d8d-9ecb-45b130e88e81/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 [2019-11-20 03:33:20,000 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-20 03:33:20,000 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 03:33:20,001 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-20 03:33:20,007 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:33:20,049 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-11-20 03:33:20,049 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 03:33:20,050 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 12 [2019-11-20 03:33:20,050 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692776323] [2019-11-20 03:33:20,052 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-20 03:33:20,053 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 03:33:20,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-20 03:33:20,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2019-11-20 03:33:20,055 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 12 states. [2019-11-20 03:33:20,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:33:20,216 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2019-11-20 03:33:20,217 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-20 03:33:20,217 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 33 [2019-11-20 03:33:20,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:33:20,218 INFO L225 Difference]: With dead ends: 30 [2019-11-20 03:33:20,219 INFO L226 Difference]: Without dead ends: 26 [2019-11-20 03:33:20,219 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2019-11-20 03:33:20,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-20 03:33:20,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-11-20 03:33:20,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-20 03:33:20,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2019-11-20 03:33:20,233 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 33 [2019-11-20 03:33:20,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:33:20,234 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2019-11-20 03:33:20,234 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-20 03:33:20,234 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2019-11-20 03:33:20,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-20 03:33:20,237 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:33:20,237 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 03:33:20,442 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:33:20,442 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:33:20,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:33:20,443 INFO L82 PathProgramCache]: Analyzing trace with hash -687460973, now seen corresponding path program 5 times [2019-11-20 03:33:20,443 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 03:33:20,443 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106341089] [2019-11-20 03:33:20,443 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 03:33:20,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:20,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:20,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:20,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:20,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:20,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:20,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:20,782 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-11-20 03:33:20,783 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106341089] [2019-11-20 03:33:20,783 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588361231] [2019-11-20 03:33:20,783 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a6533db5-ee9f-4d8d-9ecb-45b130e88e81/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 [2019-11-20 03:33:20,839 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-20 03:33:20,839 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 03:33:20,841 INFO L255 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-20 03:33:20,844 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:33:20,883 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-11-20 03:33:20,884 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 03:33:20,884 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 13 [2019-11-20 03:33:20,884 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094916450] [2019-11-20 03:33:20,885 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-20 03:33:20,885 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 03:33:20,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-20 03:33:20,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2019-11-20 03:33:20,886 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 13 states. [2019-11-20 03:33:21,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:33:21,075 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2019-11-20 03:33:21,076 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-20 03:33:21,076 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 39 [2019-11-20 03:33:21,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:33:21,078 INFO L225 Difference]: With dead ends: 33 [2019-11-20 03:33:21,078 INFO L226 Difference]: Without dead ends: 29 [2019-11-20 03:33:21,079 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 [2019-11-20 03:33:21,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-20 03:33:21,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-11-20 03:33:21,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-20 03:33:21,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2019-11-20 03:33:21,086 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 39 [2019-11-20 03:33:21,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:33:21,087 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2019-11-20 03:33:21,087 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-20 03:33:21,088 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2019-11-20 03:33:21,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-20 03:33:21,093 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:33:21,094 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 03:33:21,297 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:33:21,297 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:33:21,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:33:21,298 INFO L82 PathProgramCache]: Analyzing trace with hash 547744169, now seen corresponding path program 6 times [2019-11-20 03:33:21,298 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 03:33:21,298 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715700475] [2019-11-20 03:33:21,298 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 03:33:21,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:21,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:21,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:21,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:21,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:21,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:21,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:21,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:21,689 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-20 03:33:21,689 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715700475] [2019-11-20 03:33:21,690 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537220488] [2019-11-20 03:33:21,690 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a6533db5-ee9f-4d8d-9ecb-45b130e88e81/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 [2019-11-20 03:33:21,740 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-20 03:33:21,740 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 03:33:21,742 INFO L255 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-20 03:33:21,747 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:33:21,793 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-20 03:33:21,794 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 03:33:21,794 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 14 [2019-11-20 03:33:21,794 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510644919] [2019-11-20 03:33:21,795 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-20 03:33:21,795 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 03:33:21,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-20 03:33:21,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-11-20 03:33:21,796 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 14 states. [2019-11-20 03:33:21,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:33:21,977 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2019-11-20 03:33:21,978 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-20 03:33:21,978 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 45 [2019-11-20 03:33:21,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:33:21,980 INFO L225 Difference]: With dead ends: 36 [2019-11-20 03:33:21,980 INFO L226 Difference]: Without dead ends: 32 [2019-11-20 03:33:21,981 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2019-11-20 03:33:21,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-20 03:33:21,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-11-20 03:33:21,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-20 03:33:21,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2019-11-20 03:33:21,987 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 45 [2019-11-20 03:33:21,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:33:21,988 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2019-11-20 03:33:21,988 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-20 03:33:21,988 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2019-11-20 03:33:21,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-20 03:33:21,990 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:33:21,991 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 03:33:22,205 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:33:22,206 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:33:22,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:33:22,206 INFO L82 PathProgramCache]: Analyzing trace with hash -247823213, now seen corresponding path program 7 times [2019-11-20 03:33:22,206 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 03:33:22,206 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644602858] [2019-11-20 03:33:22,207 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 03:33:22,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:22,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:22,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:22,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:22,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:22,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:22,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:22,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:22,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:22,521 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-11-20 03:33:22,521 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644602858] [2019-11-20 03:33:22,521 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182204530] [2019-11-20 03:33:22,522 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a6533db5-ee9f-4d8d-9ecb-45b130e88e81/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 [2019-11-20 03:33:22,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:22,582 INFO L255 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-20 03:33:22,587 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:33:22,642 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-11-20 03:33:22,642 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 03:33:22,642 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 15 [2019-11-20 03:33:22,643 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581550615] [2019-11-20 03:33:22,645 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-20 03:33:22,645 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 03:33:22,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-20 03:33:22,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2019-11-20 03:33:22,648 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 15 states. [2019-11-20 03:33:22,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:33:22,852 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2019-11-20 03:33:22,853 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-20 03:33:22,853 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 51 [2019-11-20 03:33:22,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:33:22,855 INFO L225 Difference]: With dead ends: 39 [2019-11-20 03:33:22,855 INFO L226 Difference]: Without dead ends: 35 [2019-11-20 03:33:22,856 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 [2019-11-20 03:33:22,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-20 03:33:22,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2019-11-20 03:33:22,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-20 03:33:22,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2019-11-20 03:33:22,862 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 51 [2019-11-20 03:33:22,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:33:22,863 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2019-11-20 03:33:22,863 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-20 03:33:22,863 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2019-11-20 03:33:22,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-11-20 03:33:22,864 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:33:22,864 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 03:33:23,072 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:33:23,080 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:33:23,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:33:23,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1818636247, now seen corresponding path program 8 times [2019-11-20 03:33:23,081 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 03:33:23,081 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301643743] [2019-11-20 03:33:23,081 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 03:33:23,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:23,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:23,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:23,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:23,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:23,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:23,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:23,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:23,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:23,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:23,411 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-20 03:33:23,411 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301643743] [2019-11-20 03:33:23,411 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117839137] [2019-11-20 03:33:23,412 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a6533db5-ee9f-4d8d-9ecb-45b130e88e81/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 [2019-11-20 03:33:23,469 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 03:33:23,469 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 03:33:23,471 INFO L255 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-20 03:33:23,474 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:33:23,524 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-20 03:33:23,524 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 03:33:23,524 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 16 [2019-11-20 03:33:23,525 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117775416] [2019-11-20 03:33:23,525 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-20 03:33:23,526 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 03:33:23,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-20 03:33:23,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2019-11-20 03:33:23,526 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 16 states. [2019-11-20 03:33:23,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:33:23,747 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2019-11-20 03:33:23,748 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-20 03:33:23,748 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 57 [2019-11-20 03:33:23,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:33:23,750 INFO L225 Difference]: With dead ends: 42 [2019-11-20 03:33:23,750 INFO L226 Difference]: Without dead ends: 38 [2019-11-20 03:33:23,751 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=183, Invalid=417, Unknown=0, NotChecked=0, Total=600 [2019-11-20 03:33:23,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-11-20 03:33:23,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-11-20 03:33:23,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-11-20 03:33:23,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2019-11-20 03:33:23,765 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 57 [2019-11-20 03:33:23,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:33:23,766 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2019-11-20 03:33:23,766 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-20 03:33:23,766 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2019-11-20 03:33:23,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-11-20 03:33:23,772 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:33:23,772 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 03:33:23,975 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:33:23,976 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:33:23,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:33:23,976 INFO L82 PathProgramCache]: Analyzing trace with hash -2055304301, now seen corresponding path program 9 times [2019-11-20 03:33:23,976 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 03:33:23,977 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373149191] [2019-11-20 03:33:23,977 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 03:33:23,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:24,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:24,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:24,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:24,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:24,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:24,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:24,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:24,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:24,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:24,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:24,412 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2019-11-20 03:33:24,412 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373149191] [2019-11-20 03:33:24,413 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670898378] [2019-11-20 03:33:24,413 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a6533db5-ee9f-4d8d-9ecb-45b130e88e81/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 [2019-11-20 03:33:24,498 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-11-20 03:33:24,499 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 03:33:24,500 INFO L255 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-20 03:33:24,504 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:33:24,571 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2019-11-20 03:33:24,571 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 03:33:24,572 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 17 [2019-11-20 03:33:24,572 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913328867] [2019-11-20 03:33:24,573 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-20 03:33:24,573 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 03:33:24,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-20 03:33:24,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2019-11-20 03:33:24,575 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 17 states. [2019-11-20 03:33:24,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:33:24,801 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2019-11-20 03:33:24,801 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-20 03:33:24,802 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 63 [2019-11-20 03:33:24,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:33:24,803 INFO L225 Difference]: With dead ends: 45 [2019-11-20 03:33:24,803 INFO L226 Difference]: Without dead ends: 41 [2019-11-20 03:33:24,804 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 [2019-11-20 03:33:24,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-20 03:33:24,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2019-11-20 03:33:24,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-11-20 03:33:24,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2019-11-20 03:33:24,816 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 63 [2019-11-20 03:33:24,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:33:24,816 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2019-11-20 03:33:24,817 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-20 03:33:24,817 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2019-11-20 03:33:24,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-11-20 03:33:24,818 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:33:24,819 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 03:33:25,029 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:33:25,029 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:33:25,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:33:25,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1172322647, now seen corresponding path program 10 times [2019-11-20 03:33:25,030 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 03:33:25,030 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198713595] [2019-11-20 03:33:25,030 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 03:33:25,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:25,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:25,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:25,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:25,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:25,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:25,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:25,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:25,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:25,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:25,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:25,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:25,456 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2019-11-20 03:33:25,457 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198713595] [2019-11-20 03:33:25,457 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109268143] [2019-11-20 03:33:25,457 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a6533db5-ee9f-4d8d-9ecb-45b130e88e81/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 [2019-11-20 03:33:25,516 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-20 03:33:25,516 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 03:33:25,518 INFO L255 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-20 03:33:25,521 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:33:25,580 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2019-11-20 03:33:25,580 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 03:33:25,581 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 18 [2019-11-20 03:33:25,581 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146598990] [2019-11-20 03:33:25,582 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-20 03:33:25,582 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 03:33:25,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-20 03:33:25,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2019-11-20 03:33:25,583 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 18 states. [2019-11-20 03:33:25,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:33:25,820 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2019-11-20 03:33:25,820 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-20 03:33:25,821 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 69 [2019-11-20 03:33:25,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:33:25,822 INFO L225 Difference]: With dead ends: 48 [2019-11-20 03:33:25,822 INFO L226 Difference]: Without dead ends: 44 [2019-11-20 03:33:25,824 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 [2019-11-20 03:33:25,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-11-20 03:33:25,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-11-20 03:33:25,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-20 03:33:25,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2019-11-20 03:33:25,838 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 69 [2019-11-20 03:33:25,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:33:25,839 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2019-11-20 03:33:25,839 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-20 03:33:25,839 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2019-11-20 03:33:25,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-11-20 03:33:25,840 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:33:25,840 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 03:33:26,048 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:33:26,056 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:33:26,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:33:26,056 INFO L82 PathProgramCache]: Analyzing trace with hash -1452916077, now seen corresponding path program 11 times [2019-11-20 03:33:26,056 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 03:33:26,056 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635376563] [2019-11-20 03:33:26,056 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 03:33:26,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:26,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:26,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:26,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:26,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:26,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:26,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:26,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:26,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:26,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:26,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:26,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:26,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:26,494 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-11-20 03:33:26,494 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635376563] [2019-11-20 03:33:26,494 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126550582] [2019-11-20 03:33:26,494 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a6533db5-ee9f-4d8d-9ecb-45b130e88e81/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 [2019-11-20 03:33:26,563 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-11-20 03:33:26,563 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 03:33:26,565 INFO L255 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-20 03:33:26,568 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:33:26,612 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-11-20 03:33:26,612 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 03:33:26,613 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 19 [2019-11-20 03:33:26,613 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293540888] [2019-11-20 03:33:26,614 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-20 03:33:26,614 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 03:33:26,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-20 03:33:26,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2019-11-20 03:33:26,615 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 19 states. [2019-11-20 03:33:26,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:33:26,890 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2019-11-20 03:33:26,891 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-20 03:33:26,891 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 75 [2019-11-20 03:33:26,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:33:26,893 INFO L225 Difference]: With dead ends: 51 [2019-11-20 03:33:26,893 INFO L226 Difference]: Without dead ends: 47 [2019-11-20 03:33:26,894 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=294, Invalid=636, Unknown=0, NotChecked=0, Total=930 [2019-11-20 03:33:26,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-11-20 03:33:26,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2019-11-20 03:33:26,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-11-20 03:33:26,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2019-11-20 03:33:26,903 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 75 [2019-11-20 03:33:26,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:33:26,904 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2019-11-20 03:33:26,904 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-20 03:33:26,904 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2019-11-20 03:33:26,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-11-20 03:33:26,907 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:33:26,907 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 03:33:27,111 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:33:27,113 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:33:27,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:33:27,113 INFO L82 PathProgramCache]: Analyzing trace with hash -461124311, now seen corresponding path program 12 times [2019-11-20 03:33:27,114 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 03:33:27,114 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99567575] [2019-11-20 03:33:27,114 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 03:33:27,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:27,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:27,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:27,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:27,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:27,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:27,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:27,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:27,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:27,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:27,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:27,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:27,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:27,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:27,691 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2019-11-20 03:33:27,691 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99567575] [2019-11-20 03:33:27,691 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703872671] [2019-11-20 03:33:27,692 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a6533db5-ee9f-4d8d-9ecb-45b130e88e81/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 [2019-11-20 03:33:27,765 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-11-20 03:33:27,765 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 03:33:27,767 INFO L255 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 28 conjunts are in the unsatisfiable core [2019-11-20 03:33:27,770 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:33:27,834 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2019-11-20 03:33:27,834 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 03:33:27,834 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 20 [2019-11-20 03:33:27,835 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209226939] [2019-11-20 03:33:27,835 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-20 03:33:27,836 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 03:33:27,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-20 03:33:27,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=264, Unknown=0, NotChecked=0, Total=380 [2019-11-20 03:33:27,837 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 20 states. [2019-11-20 03:33:28,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:33:28,127 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2019-11-20 03:33:28,128 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-20 03:33:28,128 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 81 [2019-11-20 03:33:28,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:33:28,129 INFO L225 Difference]: With dead ends: 54 [2019-11-20 03:33:28,129 INFO L226 Difference]: Without dead ends: 50 [2019-11-20 03:33:28,130 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 [2019-11-20 03:33:28,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-11-20 03:33:28,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2019-11-20 03:33:28,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-20 03:33:28,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2019-11-20 03:33:28,147 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 81 [2019-11-20 03:33:28,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:33:28,147 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2019-11-20 03:33:28,148 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-20 03:33:28,148 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2019-11-20 03:33:28,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-11-20 03:33:28,151 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:33:28,151 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 03:33:28,355 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:33:28,355 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:33:28,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:33:28,355 INFO L82 PathProgramCache]: Analyzing trace with hash -1887065709, now seen corresponding path program 13 times [2019-11-20 03:33:28,356 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 03:33:28,356 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852328833] [2019-11-20 03:33:28,356 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 03:33:28,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:28,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:28,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:28,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:28,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:28,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:28,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:28,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:28,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:28,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:28,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:28,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:28,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:28,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:28,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:28,988 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2019-11-20 03:33:28,992 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852328833] [2019-11-20 03:33:28,993 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332642679] [2019-11-20 03:33:28,993 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a6533db5-ee9f-4d8d-9ecb-45b130e88e81/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 [2019-11-20 03:33:29,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:29,070 INFO L255 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 30 conjunts are in the unsatisfiable core [2019-11-20 03:33:29,076 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:33:29,141 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2019-11-20 03:33:29,142 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 03:33:29,143 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 21 [2019-11-20 03:33:29,143 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412580453] [2019-11-20 03:33:29,144 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-20 03:33:29,144 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 03:33:29,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-20 03:33:29,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=289, Unknown=0, NotChecked=0, Total=420 [2019-11-20 03:33:29,145 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 21 states. [2019-11-20 03:33:29,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:33:29,472 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2019-11-20 03:33:29,473 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-20 03:33:29,473 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 87 [2019-11-20 03:33:29,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:33:29,475 INFO L225 Difference]: With dead ends: 57 [2019-11-20 03:33:29,475 INFO L226 Difference]: Without dead ends: 53 [2019-11-20 03:33:29,476 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=383, Invalid=807, Unknown=0, NotChecked=0, Total=1190 [2019-11-20 03:33:29,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-11-20 03:33:29,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2019-11-20 03:33:29,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-11-20 03:33:29,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2019-11-20 03:33:29,488 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 87 [2019-11-20 03:33:29,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:33:29,489 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2019-11-20 03:33:29,490 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-20 03:33:29,490 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2019-11-20 03:33:29,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-11-20 03:33:29,492 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:33:29,492 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 03:33:29,697 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:33:29,697 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:33:29,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:33:29,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1777212503, now seen corresponding path program 14 times [2019-11-20 03:33:29,697 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 03:33:29,697 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74560772] [2019-11-20 03:33:29,697 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 03:33:29,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:29,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:29,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:29,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:29,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:29,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:29,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:30,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:30,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:30,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:30,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:30,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:30,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:30,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:30,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:30,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:33:30,412 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2019-11-20 03:33:30,412 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74560772] [2019-11-20 03:33:30,412 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855825870] [2019-11-20 03:33:30,413 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a6533db5-ee9f-4d8d-9ecb-45b130e88e81/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 [2019-11-20 03:33:30,492 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 03:33:30,492 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 03:33:30,494 INFO L255 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 32 conjunts are in the unsatisfiable core [2019-11-20 03:33:30,497 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:33:30,550 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2019-11-20 03:33:30,551 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 03:33:30,551 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 22 [2019-11-20 03:33:30,551 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85457162] [2019-11-20 03:33:30,552 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-20 03:33:30,552 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 03:33:30,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-20 03:33:30,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=315, Unknown=0, NotChecked=0, Total=462 [2019-11-20 03:33:30,553 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 22 states. [2019-11-20 03:33:30,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:33:30,849 INFO L93 Difference]: Finished difference Result 60 states and 61 transitions. [2019-11-20 03:33:30,849 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-20 03:33:30,850 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 93 [2019-11-20 03:33:30,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:33:30,850 INFO L225 Difference]: With dead ends: 60 [2019-11-20 03:33:30,851 INFO L226 Difference]: Without dead ends: 56 [2019-11-20 03:33:30,852 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=432, Invalid=900, Unknown=0, NotChecked=0, Total=1332 [2019-11-20 03:33:30,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-11-20 03:33:30,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2019-11-20 03:33:30,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-11-20 03:33:30,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2019-11-20 03:33:30,859 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 93 [2019-11-20 03:33:30,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:33:30,859 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2019-11-20 03:33:30,859 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-20 03:33:30,859 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2019-11-20 03:33:30,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-11-20 03:33:30,861 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:33:30,861 INFO L410 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 03:33:31,061 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:33:31,061 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:33:31,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:33:31,062 INFO L82 PathProgramCache]: Analyzing trace with hash -948911981, now seen corresponding path program 15 times [2019-11-20 03:33:31,062 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 03:33:31,062 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765334104] [2019-11-20 03:33:31,062 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 03:33:31,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 03:33:31,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 03:33:31,141 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 03:33:31,141 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-20 03:33:31,219 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 03:33:31 BoogieIcfgContainer [2019-11-20 03:33:31,219 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-20 03:33:31,220 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-20 03:33:31,220 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-20 03:33:31,220 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-20 03:33:31,221 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 03:33:16" (3/4) ... [2019-11-20 03:33:31,224 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-20 03:33:31,322 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_a6533db5-ee9f-4d8d-9ecb-45b130e88e81/bin/uautomizer/witness.graphml [2019-11-20 03:33:31,322 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-20 03:33:31,325 INFO L168 Benchmark]: Toolchain (without parser) took 15269.72 ms. Allocated memory was 1.0 GB in the beginning and 1.4 GB in the end (delta: 362.8 MB). Free memory was 950.1 MB in the beginning and 1.2 GB in the end (delta: -241.6 MB). Peak memory consumption was 121.2 MB. Max. memory is 11.5 GB. [2019-11-20 03:33:31,326 INFO L168 Benchmark]: CDTParser took 0.28 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. [2019-11-20 03:33:31,326 INFO L168 Benchmark]: CACSL2BoogieTranslator took 303.87 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 173.5 MB). Free memory was 950.1 MB in the beginning and 1.2 GB in the end (delta: -218.7 MB). Peak memory consumption was 23.3 MB. Max. memory is 11.5 GB. [2019-11-20 03:33:31,327 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.26 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 03:33:31,327 INFO L168 Benchmark]: Boogie Preprocessor took 30.18 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 03:33:31,327 INFO L168 Benchmark]: RCFGBuilder took 297.56 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 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. [2019-11-20 03:33:31,328 INFO L168 Benchmark]: TraceAbstraction took 14488.98 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 189.3 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -54.4 MB). Peak memory consumption was 134.8 MB. Max. memory is 11.5 GB. [2019-11-20 03:33:31,328 INFO L168 Benchmark]: Witness Printer took 102.63 ms. Allocated memory is still 1.4 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 12.8 MB). Peak memory consumption was 12.8 MB. Max. memory is 11.5 GB. [2019-11-20 03:33:31,331 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 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 303.87 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 173.5 MB). Free memory was 950.1 MB in the beginning and 1.2 GB in the end (delta: -218.7 MB). Peak memory consumption was 23.3 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 39.26 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 30.18 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 297.56 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 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 14488.98 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 189.3 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -54.4 MB). Peak memory consumption was 134.8 MB. Max. memory is 11.5 GB. * Witness Printer took 102.63 ms. Allocated memory is still 1.4 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 12.8 MB). Peak memory consumption was 12.8 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: 14.4s, OverallIterations: 16, TraceHistogramMax: 16, AutomataDifference: 3.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 122 SDtfs, 447 SDslu, 647 SDs, 0 SdLazy, 830 SolverSat, 96 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1282 GetRequests, 968 SyntacticMatches, 0 SemanticMatches, 314 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1120 ImplicationChecksByTransitivity, 4.9s 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, 0.6s SatisfiabilityAnalysisTime, 6.4s 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...