./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive/Ackermann01-2.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_a8e022ca-5768-4ba0-a4b1-88c01e0f6ada/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_a8e022ca-5768-4ba0-a4b1-88c01e0f6ada/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_a8e022ca-5768-4ba0-a4b1-88c01e0f6ada/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_a8e022ca-5768-4ba0-a4b1-88c01e0f6ada/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive/Ackermann01-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_a8e022ca-5768-4ba0-a4b1-88c01e0f6ada/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_a8e022ca-5768-4ba0-a4b1-88c01e0f6ada/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 c2f1e635c5c806286d01eb0b8ff07448b8253a7a ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-678e011 [2019-11-20 00:28:18,859 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-20 00:28:18,861 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-20 00:28:18,871 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-20 00:28:18,871 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-20 00:28:18,872 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-20 00:28:18,873 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-20 00:28:18,875 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-20 00:28:18,877 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-20 00:28:18,878 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-20 00:28:18,878 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-20 00:28:18,880 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-20 00:28:18,880 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-20 00:28:18,881 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-20 00:28:18,882 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-20 00:28:18,883 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-20 00:28:18,884 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-20 00:28:18,884 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-20 00:28:18,886 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-20 00:28:18,888 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-20 00:28:18,889 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-20 00:28:18,890 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-20 00:28:18,891 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-20 00:28:18,892 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-20 00:28:18,894 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-20 00:28:18,895 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-20 00:28:18,895 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-20 00:28:18,896 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-20 00:28:18,896 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-20 00:28:18,897 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-20 00:28:18,897 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-20 00:28:18,898 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-20 00:28:18,898 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-20 00:28:18,899 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-20 00:28:18,900 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-20 00:28:18,900 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-20 00:28:18,900 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-20 00:28:18,901 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-20 00:28:18,901 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-20 00:28:18,902 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-20 00:28:18,902 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-20 00:28:18,903 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_a8e022ca-5768-4ba0-a4b1-88c01e0f6ada/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-20 00:28:18,914 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-20 00:28:18,915 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-20 00:28:18,916 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-20 00:28:18,916 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-20 00:28:18,916 INFO L138 SettingsManager]: * Use SBE=true [2019-11-20 00:28:18,916 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-20 00:28:18,916 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-20 00:28:18,917 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-20 00:28:18,917 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-20 00:28:18,917 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-20 00:28:18,917 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-20 00:28:18,917 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-20 00:28:18,917 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-20 00:28:18,918 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-20 00:28:18,918 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-20 00:28:18,918 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-20 00:28:18,918 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-20 00:28:18,918 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-20 00:28:18,919 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-20 00:28:18,919 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-20 00:28:18,919 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-20 00:28:18,919 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-20 00:28:18,919 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-20 00:28:18,919 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-20 00:28:18,920 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-20 00:28:18,920 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-20 00:28:18,920 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-20 00:28:18,920 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-20 00:28:18,920 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_a8e022ca-5768-4ba0-a4b1-88c01e0f6ada/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 -> c2f1e635c5c806286d01eb0b8ff07448b8253a7a [2019-11-20 00:28:19,054 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-20 00:28:19,064 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-20 00:28:19,067 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-20 00:28:19,068 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-20 00:28:19,069 INFO L275 PluginConnector]: CDTParser initialized [2019-11-20 00:28:19,069 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_a8e022ca-5768-4ba0-a4b1-88c01e0f6ada/bin/uautomizer/../../sv-benchmarks/c/recursive/Ackermann01-2.c [2019-11-20 00:28:19,132 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a8e022ca-5768-4ba0-a4b1-88c01e0f6ada/bin/uautomizer/data/fe8aeaef7/bac1e1624f7743cc97d58398e9762f99/FLAG711bb4696 [2019-11-20 00:28:19,490 INFO L306 CDTParser]: Found 1 translation units. [2019-11-20 00:28:19,491 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_a8e022ca-5768-4ba0-a4b1-88c01e0f6ada/sv-benchmarks/c/recursive/Ackermann01-2.c [2019-11-20 00:28:19,497 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a8e022ca-5768-4ba0-a4b1-88c01e0f6ada/bin/uautomizer/data/fe8aeaef7/bac1e1624f7743cc97d58398e9762f99/FLAG711bb4696 [2019-11-20 00:28:19,928 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_a8e022ca-5768-4ba0-a4b1-88c01e0f6ada/bin/uautomizer/data/fe8aeaef7/bac1e1624f7743cc97d58398e9762f99 [2019-11-20 00:28:19,931 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-20 00:28:19,932 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-20 00:28:19,933 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-20 00:28:19,933 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-20 00:28:19,940 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-20 00:28:19,941 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 12:28:19" (1/1) ... [2019-11-20 00:28:19,943 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21f2b762 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:28:19, skipping insertion in model container [2019-11-20 00:28:19,943 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 12:28:19" (1/1) ... [2019-11-20 00:28:19,949 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-20 00:28:19,964 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-20 00:28:20,100 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 00:28:20,104 INFO L188 MainTranslator]: Completed pre-run [2019-11-20 00:28:20,216 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 00:28:20,229 INFO L192 MainTranslator]: Completed translation [2019-11-20 00:28:20,230 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:28:20 WrapperNode [2019-11-20 00:28:20,230 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-20 00:28:20,231 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-20 00:28:20,231 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-20 00:28:20,231 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-20 00:28:20,239 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:28:20" (1/1) ... [2019-11-20 00:28:20,244 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:28:20" (1/1) ... [2019-11-20 00:28:20,258 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-20 00:28:20,259 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-20 00:28:20,259 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-20 00:28:20,259 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-20 00:28:20,266 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:28:20" (1/1) ... [2019-11-20 00:28:20,266 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:28:20" (1/1) ... [2019-11-20 00:28:20,267 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:28:20" (1/1) ... [2019-11-20 00:28:20,267 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:28:20" (1/1) ... [2019-11-20 00:28:20,269 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:28:20" (1/1) ... [2019-11-20 00:28:20,271 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:28:20" (1/1) ... [2019-11-20 00:28:20,272 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:28:20" (1/1) ... [2019-11-20 00:28:20,273 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-20 00:28:20,274 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-20 00:28:20,274 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-20 00:28:20,274 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-20 00:28:20,275 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:28:20" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a8e022ca-5768-4ba0-a4b1-88c01e0f6ada/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 00:28:20,325 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-20 00:28:20,326 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-20 00:28:20,326 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2019-11-20 00:28:20,326 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2019-11-20 00:28:20,594 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-20 00:28:20,594 INFO L285 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-20 00:28:20,595 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 12:28:20 BoogieIcfgContainer [2019-11-20 00:28:20,596 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-20 00:28:20,596 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-20 00:28:20,597 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-20 00:28:20,602 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-20 00:28:20,602 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 12:28:19" (1/3) ... [2019-11-20 00:28:20,604 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7602ca70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 12:28:20, skipping insertion in model container [2019-11-20 00:28:20,604 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:28:20" (2/3) ... [2019-11-20 00:28:20,604 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7602ca70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 12:28:20, skipping insertion in model container [2019-11-20 00:28:20,605 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 12:28:20" (3/3) ... [2019-11-20 00:28:20,606 INFO L109 eAbstractionObserver]: Analyzing ICFG Ackermann01-2.c [2019-11-20 00:28:20,614 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-20 00:28:20,619 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-20 00:28:20,629 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-20 00:28:20,653 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-20 00:28:20,656 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-20 00:28:20,656 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-20 00:28:20,657 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-20 00:28:20,658 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-20 00:28:20,658 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-20 00:28:20,658 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-20 00:28:20,658 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-20 00:28:20,677 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2019-11-20 00:28:20,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-20 00:28:20,682 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 00:28:20,683 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 00:28:20,683 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 00:28:20,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:28:20,688 INFO L82 PathProgramCache]: Analyzing trace with hash -1260755674, now seen corresponding path program 1 times [2019-11-20 00:28:20,694 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 00:28:20,694 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514545920] [2019-11-20 00:28:20,694 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 00:28:20,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:28:20,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:28:20,902 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 00:28:20,903 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514545920] [2019-11-20 00:28:20,904 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 00:28:20,904 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-20 00:28:20,905 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340620625] [2019-11-20 00:28:20,909 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-20 00:28:20,909 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 00:28:20,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-20 00:28:20,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-20 00:28:20,921 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 7 states. [2019-11-20 00:28:21,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 00:28:21,131 INFO L93 Difference]: Finished difference Result 37 states and 45 transitions. [2019-11-20 00:28:21,132 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-20 00:28:21,133 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-11-20 00:28:21,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 00:28:21,141 INFO L225 Difference]: With dead ends: 37 [2019-11-20 00:28:21,141 INFO L226 Difference]: Without dead ends: 21 [2019-11-20 00:28:21,144 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-11-20 00:28:21,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-11-20 00:28:21,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-11-20 00:28:21,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-20 00:28:21,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 27 transitions. [2019-11-20 00:28:21,180 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 27 transitions. Word has length 11 [2019-11-20 00:28:21,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 00:28:21,181 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 27 transitions. [2019-11-20 00:28:21,181 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-20 00:28:21,181 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 27 transitions. [2019-11-20 00:28:21,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-20 00:28:21,183 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 00:28:21,183 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 00:28:21,183 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 00:28:21,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:28:21,184 INFO L82 PathProgramCache]: Analyzing trace with hash 963920485, now seen corresponding path program 1 times [2019-11-20 00:28:21,184 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 00:28:21,184 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254886811] [2019-11-20 00:28:21,185 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 00:28:21,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:28:21,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:28:21,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:28:21,338 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-20 00:28:21,338 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254886811] [2019-11-20 00:28:21,339 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 00:28:21,339 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-20 00:28:21,339 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467316594] [2019-11-20 00:28:21,340 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-20 00:28:21,341 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 00:28:21,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-20 00:28:21,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2019-11-20 00:28:21,341 INFO L87 Difference]: Start difference. First operand 21 states and 27 transitions. Second operand 8 states. [2019-11-20 00:28:21,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 00:28:21,524 INFO L93 Difference]: Finished difference Result 28 states and 36 transitions. [2019-11-20 00:28:21,525 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-20 00:28:21,525 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2019-11-20 00:28:21,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 00:28:21,526 INFO L225 Difference]: With dead ends: 28 [2019-11-20 00:28:21,526 INFO L226 Difference]: Without dead ends: 24 [2019-11-20 00:28:21,527 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-11-20 00:28:21,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-11-20 00:28:21,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2019-11-20 00:28:21,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-20 00:28:21,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2019-11-20 00:28:21,535 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 18 [2019-11-20 00:28:21,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 00:28:21,536 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2019-11-20 00:28:21,536 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-20 00:28:21,536 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2019-11-20 00:28:21,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-20 00:28:21,538 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 00:28:21,538 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 00:28:21,538 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 00:28:21,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:28:21,539 INFO L82 PathProgramCache]: Analyzing trace with hash -193744714, now seen corresponding path program 1 times [2019-11-20 00:28:21,539 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 00:28:21,539 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875436055] [2019-11-20 00:28:21,539 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 00:28:21,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:28:21,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:28:21,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:28:21,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:28:21,631 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-20 00:28:21,631 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875436055] [2019-11-20 00:28:21,631 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113324351] [2019-11-20 00:28:21,632 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a8e022ca-5768-4ba0-a4b1-88c01e0f6ada/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 00:28:21,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:28:21,688 INFO L255 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-20 00:28:21,695 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 00:28:21,767 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-20 00:28:21,767 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 00:28:21,767 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 10 [2019-11-20 00:28:21,767 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105650523] [2019-11-20 00:28:21,768 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-20 00:28:21,768 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 00:28:21,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-20 00:28:21,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2019-11-20 00:28:21,769 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand 10 states. [2019-11-20 00:28:21,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 00:28:21,938 INFO L93 Difference]: Finished difference Result 47 states and 74 transitions. [2019-11-20 00:28:21,939 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-20 00:28:21,939 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 24 [2019-11-20 00:28:21,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 00:28:21,941 INFO L225 Difference]: With dead ends: 47 [2019-11-20 00:28:21,941 INFO L226 Difference]: Without dead ends: 29 [2019-11-20 00:28:21,942 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2019-11-20 00:28:21,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-20 00:28:21,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 24. [2019-11-20 00:28:21,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-20 00:28:21,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2019-11-20 00:28:21,950 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 24 [2019-11-20 00:28:21,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 00:28:21,951 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2019-11-20 00:28:21,951 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-20 00:28:21,951 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2019-11-20 00:28:21,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-20 00:28:21,953 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 00:28:21,953 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 00:28:22,156 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 00:28:22,156 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 00:28:22,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:28:22,157 INFO L82 PathProgramCache]: Analyzing trace with hash 416247163, now seen corresponding path program 1 times [2019-11-20 00:28:22,157 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 00:28:22,157 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013457941] [2019-11-20 00:28:22,157 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 00:28:22,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:28:22,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:28:22,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:28:22,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:28:22,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:28:22,394 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-20 00:28:22,394 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013457941] [2019-11-20 00:28:22,395 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720587743] [2019-11-20 00:28:22,395 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a8e022ca-5768-4ba0-a4b1-88c01e0f6ada/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 00:28:22,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:28:22,435 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-20 00:28:22,437 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 00:28:22,475 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-11-20 00:28:22,476 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 00:28:22,476 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 14 [2019-11-20 00:28:22,477 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775677037] [2019-11-20 00:28:22,478 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-20 00:28:22,478 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 00:28:22,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-20 00:28:22,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2019-11-20 00:28:22,479 INFO L87 Difference]: Start difference. First operand 24 states and 31 transitions. Second operand 14 states. [2019-11-20 00:28:23,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 00:28:23,048 INFO L93 Difference]: Finished difference Result 50 states and 83 transitions. [2019-11-20 00:28:23,049 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-20 00:28:23,049 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 31 [2019-11-20 00:28:23,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 00:28:23,053 INFO L225 Difference]: With dead ends: 50 [2019-11-20 00:28:23,053 INFO L226 Difference]: Without dead ends: 46 [2019-11-20 00:28:23,054 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2019-11-20 00:28:23,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-11-20 00:28:23,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 32. [2019-11-20 00:28:23,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-20 00:28:23,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 49 transitions. [2019-11-20 00:28:23,083 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 49 transitions. Word has length 31 [2019-11-20 00:28:23,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 00:28:23,084 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 49 transitions. [2019-11-20 00:28:23,084 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-20 00:28:23,085 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 49 transitions. [2019-11-20 00:28:23,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-11-20 00:28:23,092 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 00:28:23,093 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 00:28:23,297 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 00:28:23,297 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 00:28:23,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:28:23,298 INFO L82 PathProgramCache]: Analyzing trace with hash -781004688, now seen corresponding path program 2 times [2019-11-20 00:28:23,298 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 00:28:23,298 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111100072] [2019-11-20 00:28:23,298 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 00:28:23,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:28:23,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:28:23,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:28:23,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:28:23,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:28:23,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:28:23,552 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-11-20 00:28:23,553 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111100072] [2019-11-20 00:28:23,553 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64606401] [2019-11-20 00:28:23,553 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a8e022ca-5768-4ba0-a4b1-88c01e0f6ada/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 00:28:23,604 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 00:28:23,605 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 00:28:23,607 INFO L255 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-20 00:28:23,609 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 00:28:23,638 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 11 proven. 12 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-20 00:28:23,638 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 00:28:23,639 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 15 [2019-11-20 00:28:23,639 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017445059] [2019-11-20 00:28:23,640 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-20 00:28:23,640 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 00:28:23,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-20 00:28:23,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2019-11-20 00:28:23,640 INFO L87 Difference]: Start difference. First operand 32 states and 49 transitions. Second operand 15 states. [2019-11-20 00:28:24,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 00:28:24,142 INFO L93 Difference]: Finished difference Result 61 states and 112 transitions. [2019-11-20 00:28:24,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-20 00:28:24,143 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 38 [2019-11-20 00:28:24,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 00:28:24,145 INFO L225 Difference]: With dead ends: 61 [2019-11-20 00:28:24,146 INFO L226 Difference]: Without dead ends: 57 [2019-11-20 00:28:24,147 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=137, Invalid=565, Unknown=0, NotChecked=0, Total=702 [2019-11-20 00:28:24,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-11-20 00:28:24,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 30. [2019-11-20 00:28:24,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-20 00:28:24,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2019-11-20 00:28:24,169 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 38 [2019-11-20 00:28:24,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 00:28:24,170 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2019-11-20 00:28:24,170 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-20 00:28:24,170 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2019-11-20 00:28:24,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-11-20 00:28:24,171 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 00:28:24,172 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 00:28:24,376 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 00:28:24,377 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 00:28:24,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:28:24,377 INFO L82 PathProgramCache]: Analyzing trace with hash 947442768, now seen corresponding path program 3 times [2019-11-20 00:28:24,377 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 00:28:24,377 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885244533] [2019-11-20 00:28:24,378 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 00:28:24,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:28:24,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:28:24,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:28:24,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:28:24,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:28:24,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:28:24,728 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-11-20 00:28:24,728 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885244533] [2019-11-20 00:28:24,728 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063308521] [2019-11-20 00:28:24,729 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a8e022ca-5768-4ba0-a4b1-88c01e0f6ada/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 00:28:24,759 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-20 00:28:24,759 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 00:28:24,760 INFO L255 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-20 00:28:24,762 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 00:28:24,896 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 17 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-11-20 00:28:24,896 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 00:28:24,896 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 21 [2019-11-20 00:28:24,896 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648622838] [2019-11-20 00:28:24,897 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-20 00:28:24,897 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 00:28:24,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-20 00:28:24,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2019-11-20 00:28:24,898 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 21 states. [2019-11-20 00:28:25,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 00:28:25,355 INFO L93 Difference]: Finished difference Result 80 states and 152 transitions. [2019-11-20 00:28:25,357 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-20 00:28:25,357 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 38 [2019-11-20 00:28:25,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 00:28:25,359 INFO L225 Difference]: With dead ends: 80 [2019-11-20 00:28:25,359 INFO L226 Difference]: Without dead ends: 52 [2019-11-20 00:28:25,361 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=145, Invalid=785, Unknown=0, NotChecked=0, Total=930 [2019-11-20 00:28:25,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-11-20 00:28:25,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 42. [2019-11-20 00:28:25,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-20 00:28:25,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 71 transitions. [2019-11-20 00:28:25,373 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 71 transitions. Word has length 38 [2019-11-20 00:28:25,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 00:28:25,373 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 71 transitions. [2019-11-20 00:28:25,374 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-20 00:28:25,374 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 71 transitions. [2019-11-20 00:28:25,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-11-20 00:28:25,376 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 00:28:25,377 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 00:28:25,580 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 00:28:25,580 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 00:28:25,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:28:25,581 INFO L82 PathProgramCache]: Analyzing trace with hash 2112206418, now seen corresponding path program 4 times [2019-11-20 00:28:25,581 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 00:28:25,581 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386067678] [2019-11-20 00:28:25,581 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 00:28:25,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:28:25,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:28:25,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:28:25,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:28:25,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:28:25,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:28:25,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:28:25,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:28:25,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:28:26,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:28:26,031 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 63 proven. 57 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2019-11-20 00:28:26,033 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386067678] [2019-11-20 00:28:26,034 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911440470] [2019-11-20 00:28:26,034 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a8e022ca-5768-4ba0-a4b1-88c01e0f6ada/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 00:28:26,074 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-20 00:28:26,074 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 00:28:26,075 INFO L255 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-20 00:28:26,077 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 00:28:26,229 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 86 proven. 35 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2019-11-20 00:28:26,229 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 00:28:26,229 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 9] total 26 [2019-11-20 00:28:26,229 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417293391] [2019-11-20 00:28:26,230 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-11-20 00:28:26,230 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 00:28:26,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-11-20 00:28:26,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2019-11-20 00:28:26,231 INFO L87 Difference]: Start difference. First operand 42 states and 71 transitions. Second operand 26 states. [2019-11-20 00:28:27,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 00:28:27,589 INFO L93 Difference]: Finished difference Result 147 states and 385 transitions. [2019-11-20 00:28:27,589 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-11-20 00:28:27,589 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 64 [2019-11-20 00:28:27,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 00:28:27,592 INFO L225 Difference]: With dead ends: 147 [2019-11-20 00:28:27,592 INFO L226 Difference]: Without dead ends: 109 [2019-11-20 00:28:27,597 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=528, Invalid=2124, Unknown=0, NotChecked=0, Total=2652 [2019-11-20 00:28:27,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2019-11-20 00:28:27,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 90. [2019-11-20 00:28:27,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2019-11-20 00:28:27,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 182 transitions. [2019-11-20 00:28:27,620 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 182 transitions. Word has length 64 [2019-11-20 00:28:27,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 00:28:27,621 INFO L462 AbstractCegarLoop]: Abstraction has 90 states and 182 transitions. [2019-11-20 00:28:27,621 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-11-20 00:28:27,621 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 182 transitions. [2019-11-20 00:28:27,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2019-11-20 00:28:27,625 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 00:28:27,626 INFO L410 BasicCegarLoop]: trace histogram [17, 17, 10, 7, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 00:28:27,829 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 00:28:27,829 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 00:28:27,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:28:27,830 INFO L82 PathProgramCache]: Analyzing trace with hash -2068462442, now seen corresponding path program 5 times [2019-11-20 00:28:27,830 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 00:28:27,830 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853861208] [2019-11-20 00:28:27,830 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 00:28:27,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:28:27,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:28:27,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:28:27,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:28:28,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:28:28,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:28:28,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:28:28,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:28:28,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:28:28,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:28:28,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:28:28,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:28:28,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:28:28,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:28:28,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:28:28,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:28:28,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:28:28,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:28:28,361 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 230 proven. 184 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2019-11-20 00:28:28,362 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853861208] [2019-11-20 00:28:28,362 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640689759] [2019-11-20 00:28:28,363 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a8e022ca-5768-4ba0-a4b1-88c01e0f6ada/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 00:28:28,440 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2019-11-20 00:28:28,440 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 00:28:28,441 INFO L255 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-20 00:28:28,447 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 00:28:28,527 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 333 proven. 114 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked. [2019-11-20 00:28:28,527 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 00:28:28,527 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 14] total 24 [2019-11-20 00:28:28,528 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883852021] [2019-11-20 00:28:28,532 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-20 00:28:28,532 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 00:28:28,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-20 00:28:28,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2019-11-20 00:28:28,533 INFO L87 Difference]: Start difference. First operand 90 states and 182 transitions. Second operand 24 states. [2019-11-20 00:28:29,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 00:28:29,586 INFO L93 Difference]: Finished difference Result 224 states and 654 transitions. [2019-11-20 00:28:29,586 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-11-20 00:28:29,586 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 117 [2019-11-20 00:28:29,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 00:28:29,587 INFO L225 Difference]: With dead ends: 224 [2019-11-20 00:28:29,587 INFO L226 Difference]: Without dead ends: 0 [2019-11-20 00:28:29,592 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=533, Invalid=2437, Unknown=0, NotChecked=0, Total=2970 [2019-11-20 00:28:29,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-20 00:28:29,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-20 00:28:29,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-20 00:28:29,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-20 00:28:29,593 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 117 [2019-11-20 00:28:29,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 00:28:29,593 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-20 00:28:29,593 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-20 00:28:29,593 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-20 00:28:29,594 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-20 00:28:29,795 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 00:28:29,809 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-11-20 00:28:30,873 WARN L191 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 25 [2019-11-20 00:28:30,967 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-11-20 00:28:30,968 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-11-20 00:28:30,968 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-11-20 00:28:30,968 INFO L444 ceAbstractionStarter]: For program point L28(lines 28 32) no Hoare annotation was computed. [2019-11-20 00:28:30,968 INFO L447 ceAbstractionStarter]: At program point L26(lines 26 46) the Hoare annotation is: true [2019-11-20 00:28:30,968 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 44) no Hoare annotation was computed. [2019-11-20 00:28:30,968 INFO L444 ceAbstractionStarter]: For program point L44(line 44) no Hoare annotation was computed. [2019-11-20 00:28:30,968 INFO L444 ceAbstractionStarter]: For program point L41(lines 41 45) no Hoare annotation was computed. [2019-11-20 00:28:30,969 INFO L440 ceAbstractionStarter]: At program point L40(line 40) the Hoare annotation is: (<= 0 ULTIMATE.start_main_~n~0) [2019-11-20 00:28:30,969 INFO L444 ceAbstractionStarter]: For program point L40-1(line 40) no Hoare annotation was computed. [2019-11-20 00:28:30,969 INFO L444 ceAbstractionStarter]: For program point L34(lines 34 39) no Hoare annotation was computed. [2019-11-20 00:28:30,969 INFO L444 ceAbstractionStarter]: For program point ackermannEXIT(lines 15 23) no Hoare annotation was computed. [2019-11-20 00:28:30,969 INFO L440 ceAbstractionStarter]: At program point L22(line 22) the Hoare annotation is: (and (= ackermann_~m |ackermann_#in~m|) (= ackermann_~n |ackermann_#in~n|) (not (= ackermann_~m 0))) [2019-11-20 00:28:30,969 INFO L447 ceAbstractionStarter]: At program point ackermannENTRY(lines 15 23) the Hoare annotation is: true [2019-11-20 00:28:30,969 INFO L444 ceAbstractionStarter]: For program point L22-1(line 22) no Hoare annotation was computed. [2019-11-20 00:28:30,969 INFO L440 ceAbstractionStarter]: At program point L20(line 20) the Hoare annotation is: (and (= |ackermann_#in~n| 0) (= ackermann_~m |ackermann_#in~m|) (= ackermann_~n |ackermann_#in~n|) (not (= ackermann_~m 0))) [2019-11-20 00:28:30,969 INFO L440 ceAbstractionStarter]: At program point L22-2(line 22) the Hoare annotation is: (let ((.cse0 (<= 3 |ackermann_#t~ret1|))) (and (<= 0 |ackermann_#in~m|) (or (<= |ackermann_#in~n| 1) .cse0) (not (<= |ackermann_#in~n| 0)) (let ((.cse1 (= ackermann_~m |ackermann_#in~m|)) (.cse2 (= ackermann_~n |ackermann_#in~n|)) (.cse3 (not (= ackermann_~m 0)))) (or (and .cse1 .cse2 (<= |ackermann_#in~m| 1) (<= 2 |ackermann_#t~ret1|) .cse3) (and .cse0 .cse1 .cse2 .cse3))))) [2019-11-20 00:28:30,970 INFO L444 ceAbstractionStarter]: For program point L19(lines 19 21) no Hoare annotation was computed. [2019-11-20 00:28:30,970 INFO L444 ceAbstractionStarter]: For program point L20-1(line 20) no Hoare annotation was computed. [2019-11-20 00:28:30,970 INFO L444 ceAbstractionStarter]: For program point L22-3(line 22) no Hoare annotation was computed. [2019-11-20 00:28:30,970 INFO L444 ceAbstractionStarter]: For program point L16(lines 16 18) no Hoare annotation was computed. [2019-11-20 00:28:30,970 INFO L444 ceAbstractionStarter]: For program point ackermannFINAL(lines 15 23) no Hoare annotation was computed. [2019-11-20 00:28:30,979 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 12:28:30 BoogieIcfgContainer [2019-11-20 00:28:30,979 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-20 00:28:30,980 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-20 00:28:30,981 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-20 00:28:30,981 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-20 00:28:30,981 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 12:28:20" (3/4) ... [2019-11-20 00:28:30,985 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-11-20 00:28:30,991 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ackermann [2019-11-20 00:28:30,996 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2019-11-20 00:28:30,996 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2019-11-20 00:28:31,051 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_a8e022ca-5768-4ba0-a4b1-88c01e0f6ada/bin/uautomizer/witness.graphml [2019-11-20 00:28:31,052 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-20 00:28:31,053 INFO L168 Benchmark]: Toolchain (without parser) took 11121.34 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 290.5 MB). Free memory was 950.1 MB in the beginning and 1.0 GB in the end (delta: -68.4 MB). Peak memory consumption was 222.0 MB. Max. memory is 11.5 GB. [2019-11-20 00:28:31,053 INFO L168 Benchmark]: CDTParser took 0.21 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 00:28:31,054 INFO L168 Benchmark]: CACSL2BoogieTranslator took 297.28 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 126.9 MB). Free memory was 950.1 MB in the beginning and 1.1 GB in the end (delta: -169.0 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. [2019-11-20 00:28:31,054 INFO L168 Benchmark]: Boogie Procedure Inliner took 28.23 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 00:28:31,054 INFO L168 Benchmark]: Boogie Preprocessor took 14.63 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 3.6 MB). Peak memory consumption was 3.6 MB. Max. memory is 11.5 GB. [2019-11-20 00:28:31,054 INFO L168 Benchmark]: RCFGBuilder took 321.86 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 24.3 MB). Peak memory consumption was 24.3 MB. Max. memory is 11.5 GB. [2019-11-20 00:28:31,055 INFO L168 Benchmark]: TraceAbstraction took 10383.02 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 163.6 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 60.3 MB). Peak memory consumption was 223.8 MB. Max. memory is 11.5 GB. [2019-11-20 00:28:31,055 INFO L168 Benchmark]: Witness Printer took 71.37 ms. Allocated memory is still 1.3 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 3.2 MB). Peak memory consumption was 3.2 MB. Max. memory is 11.5 GB. [2019-11-20 00:28:31,057 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 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 297.28 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 126.9 MB). Free memory was 950.1 MB in the beginning and 1.1 GB in the end (delta: -169.0 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 28.23 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 14.63 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 3.6 MB). Peak memory consumption was 3.6 MB. Max. memory is 11.5 GB. * RCFGBuilder took 321.86 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 24.3 MB). Peak memory consumption was 24.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 10383.02 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 163.6 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 60.3 MB). Peak memory consumption was 223.8 MB. Max. memory is 11.5 GB. * Witness Printer took 71.37 ms. Allocated memory is still 1.3 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 3.2 MB). Peak memory consumption was 3.2 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 44]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 26]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 22 locations, 1 error locations. Result: SAFE, OverallTime: 10.3s, OverallIterations: 8, TraceHistogramMax: 17, AutomataDifference: 4.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.1s, HoareTripleCheckerStatistics: 145 SDtfs, 330 SDslu, 779 SDs, 0 SdLazy, 2748 SolverSat, 672 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 614 GetRequests, 405 SyntacticMatches, 0 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1151 ImplicationChecksByTransitivity, 3.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=90occurred in iteration=7, 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, 8 MinimizatonAttempts, 77 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 6 LocationsWithAnnotation, 234 PreInvPairs, 377 NumberOfFragments, 77 HoareAnnotationTreeSize, 234 FomulaSimplifications, 48207 FormulaSimplificationTreeSizeReduction, 0.6s HoareSimplificationTime, 6 FomulaSimplificationsInter, 2561 FormulaSimplificationTreeSizeReductionInter, 0.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.5s InterpolantComputationTime, 653 NumberOfCodeBlocks, 601 NumberOfCodeBlocksAsserted, 24 NumberOfCheckSat, 639 ConstructedInterpolants, 0 QuantifiedInterpolants, 95043 SizeOfPredicates, 26 NumberOfNonLiveVariables, 785 ConjunctsInSsa, 79 ConjunctsInUnsatCore, 14 InterpolantComputations, 2 PerfectInterpolantSequences, 1472/1916 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 correct! Received shutdown request...