./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-invgen/string_concat-noarr.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cad46833 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_b5515e52-b9dd-45db-b853-52b7190a6068/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_b5515e52-b9dd-45db-b853-52b7190a6068/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_b5515e52-b9dd-45db-b853-52b7190a6068/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_b5515e52-b9dd-45db-b853-52b7190a6068/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-invgen/string_concat-noarr.i -s /tmp/vcloud-vcloud-master/worker/run_dir_b5515e52-b9dd-45db-b853-52b7190a6068/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_b5515e52-b9dd-45db-b853-52b7190a6068/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 9f3cf63c7adaf3e2c576343bf7deb0d4236e103c ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-cad4683 [2019-11-15 20:15:59,788 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-15 20:15:59,790 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-15 20:15:59,807 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-15 20:15:59,808 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-15 20:15:59,809 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-15 20:15:59,812 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-15 20:15:59,825 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-15 20:15:59,828 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-15 20:15:59,829 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-15 20:15:59,830 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-15 20:15:59,833 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-15 20:15:59,833 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-15 20:15:59,834 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-15 20:15:59,835 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-15 20:15:59,837 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-15 20:15:59,838 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-15 20:15:59,839 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-15 20:15:59,841 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-15 20:15:59,843 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-15 20:15:59,849 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-15 20:15:59,853 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-15 20:15:59,857 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-15 20:15:59,858 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-15 20:15:59,865 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-15 20:15:59,866 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-15 20:15:59,866 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-15 20:15:59,869 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-15 20:15:59,869 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-15 20:15:59,871 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-15 20:15:59,871 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-15 20:15:59,872 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-15 20:15:59,873 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-15 20:15:59,874 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-15 20:15:59,877 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-15 20:15:59,877 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-15 20:15:59,878 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-15 20:15:59,878 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-15 20:15:59,878 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-15 20:15:59,879 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-15 20:15:59,879 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-15 20:15:59,880 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_b5515e52-b9dd-45db-b853-52b7190a6068/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-15 20:15:59,897 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-15 20:15:59,897 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-15 20:15:59,898 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-15 20:15:59,898 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-15 20:15:59,899 INFO L138 SettingsManager]: * Use SBE=true [2019-11-15 20:15:59,899 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-15 20:15:59,899 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-15 20:15:59,899 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-15 20:15:59,899 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-15 20:15:59,900 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-15 20:15:59,900 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-15 20:15:59,900 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-15 20:15:59,900 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-15 20:15:59,900 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-15 20:15:59,900 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-15 20:15:59,901 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-15 20:15:59,901 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-15 20:15:59,901 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-15 20:15:59,901 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-15 20:15:59,901 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-15 20:15:59,902 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-15 20:15:59,902 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-15 20:15:59,902 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-15 20:15:59,902 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-15 20:15:59,902 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-15 20:15:59,903 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-15 20:15:59,903 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-15 20:15:59,903 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-15 20:15:59,903 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_b5515e52-b9dd-45db-b853-52b7190a6068/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 -> 9f3cf63c7adaf3e2c576343bf7deb0d4236e103c [2019-11-15 20:15:59,948 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-15 20:15:59,961 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-15 20:15:59,974 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-15 20:15:59,975 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-15 20:15:59,976 INFO L275 PluginConnector]: CDTParser initialized [2019-11-15 20:15:59,978 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_b5515e52-b9dd-45db-b853-52b7190a6068/bin/uautomizer/../../sv-benchmarks/c/loop-invgen/string_concat-noarr.i [2019-11-15 20:16:00,055 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_b5515e52-b9dd-45db-b853-52b7190a6068/bin/uautomizer/data/b5e3df1fc/938dff5537e4430d898bd0633fe9bc76/FLAGf04dcd623 [2019-11-15 20:16:00,498 INFO L306 CDTParser]: Found 1 translation units. [2019-11-15 20:16:00,500 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_b5515e52-b9dd-45db-b853-52b7190a6068/sv-benchmarks/c/loop-invgen/string_concat-noarr.i [2019-11-15 20:16:00,508 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_b5515e52-b9dd-45db-b853-52b7190a6068/bin/uautomizer/data/b5e3df1fc/938dff5537e4430d898bd0633fe9bc76/FLAGf04dcd623 [2019-11-15 20:16:00,913 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_b5515e52-b9dd-45db-b853-52b7190a6068/bin/uautomizer/data/b5e3df1fc/938dff5537e4430d898bd0633fe9bc76 [2019-11-15 20:16:00,916 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-15 20:16:00,918 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-15 20:16:00,919 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-15 20:16:00,919 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-15 20:16:00,924 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-15 20:16:00,926 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.11 08:16:00" (1/1) ... [2019-11-15 20:16:00,929 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@600d7116 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 08:16:00, skipping insertion in model container [2019-11-15 20:16:00,929 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.11 08:16:00" (1/1) ... [2019-11-15 20:16:00,938 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-15 20:16:00,959 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-15 20:16:01,311 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-15 20:16:01,321 INFO L188 MainTranslator]: Completed pre-run [2019-11-15 20:16:01,340 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-15 20:16:01,353 INFO L192 MainTranslator]: Completed translation [2019-11-15 20:16:01,353 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 08:16:01 WrapperNode [2019-11-15 20:16:01,353 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-15 20:16:01,355 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-15 20:16:01,355 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-15 20:16:01,355 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-15 20:16:01,365 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 08:16:01" (1/1) ... [2019-11-15 20:16:01,371 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 08:16:01" (1/1) ... [2019-11-15 20:16:01,392 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-15 20:16:01,393 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-15 20:16:01,393 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-15 20:16:01,393 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-15 20:16:01,404 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 08:16:01" (1/1) ... [2019-11-15 20:16:01,405 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 08:16:01" (1/1) ... [2019-11-15 20:16:01,406 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 08:16:01" (1/1) ... [2019-11-15 20:16:01,406 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 08:16:01" (1/1) ... [2019-11-15 20:16:01,409 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 08:16:01" (1/1) ... [2019-11-15 20:16:01,419 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 08:16:01" (1/1) ... [2019-11-15 20:16:01,424 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 08:16:01" (1/1) ... [2019-11-15 20:16:01,426 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-15 20:16:01,427 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-15 20:16:01,427 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-15 20:16:01,427 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-15 20:16:01,433 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 08:16:01" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b5515e52-b9dd-45db-b853-52b7190a6068/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 [2019-11-15 20:16:01,492 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-15 20:16:01,493 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-15 20:16:01,747 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-15 20:16:01,748 INFO L284 CfgBuilder]: Removed 8 assume(true) statements. [2019-11-15 20:16:01,749 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 08:16:01 BoogieIcfgContainer [2019-11-15 20:16:01,749 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-15 20:16:01,750 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-15 20:16:01,750 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-15 20:16:01,753 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-15 20:16:01,754 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.11 08:16:00" (1/3) ... [2019-11-15 20:16:01,754 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ea6c519 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.11 08:16:01, skipping insertion in model container [2019-11-15 20:16:01,755 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 08:16:01" (2/3) ... [2019-11-15 20:16:01,755 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ea6c519 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.11 08:16:01, skipping insertion in model container [2019-11-15 20:16:01,755 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 08:16:01" (3/3) ... [2019-11-15 20:16:01,761 INFO L109 eAbstractionObserver]: Analyzing ICFG string_concat-noarr.i [2019-11-15 20:16:01,771 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-15 20:16:01,779 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-15 20:16:01,791 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-15 20:16:01,823 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-15 20:16:01,823 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-15 20:16:01,824 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-15 20:16:01,824 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-15 20:16:01,837 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-15 20:16:01,837 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-15 20:16:01,838 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-15 20:16:01,838 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-15 20:16:01,861 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2019-11-15 20:16:01,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-15 20:16:01,866 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 20:16:01,867 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 20:16:01,869 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 20:16:01,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 20:16:01,875 INFO L82 PathProgramCache]: Analyzing trace with hash -1246292942, now seen corresponding path program 1 times [2019-11-15 20:16:01,882 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 20:16:01,883 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128724035] [2019-11-15 20:16:01,883 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:16:01,883 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:16:01,883 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 20:16:01,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:16:01,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 20:16:01,973 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128724035] [2019-11-15 20:16:01,973 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 20:16:01,974 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-15 20:16:01,974 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566754832] [2019-11-15 20:16:01,979 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-15 20:16:01,979 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 20:16:01,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-15 20:16:01,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-15 20:16:01,995 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 2 states. [2019-11-15 20:16:02,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 20:16:02,009 INFO L93 Difference]: Finished difference Result 28 states and 38 transitions. [2019-11-15 20:16:02,010 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-15 20:16:02,011 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2019-11-15 20:16:02,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 20:16:02,021 INFO L225 Difference]: With dead ends: 28 [2019-11-15 20:16:02,022 INFO L226 Difference]: Without dead ends: 11 [2019-11-15 20:16:02,025 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-15 20:16:02,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2019-11-15 20:16:02,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2019-11-15 20:16:02,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-11-15 20:16:02,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2019-11-15 20:16:02,065 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 8 [2019-11-15 20:16:02,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 20:16:02,065 INFO L462 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2019-11-15 20:16:02,065 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-15 20:16:02,065 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2019-11-15 20:16:02,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-15 20:16:02,066 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 20:16:02,066 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 20:16:02,066 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 20:16:02,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 20:16:02,067 INFO L82 PathProgramCache]: Analyzing trace with hash -234964329, now seen corresponding path program 1 times [2019-11-15 20:16:02,067 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 20:16:02,068 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960985755] [2019-11-15 20:16:02,068 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:16:02,068 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:16:02,068 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 20:16:02,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:16:02,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 20:16:02,148 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960985755] [2019-11-15 20:16:02,149 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 20:16:02,149 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-15 20:16:02,149 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518300463] [2019-11-15 20:16:02,151 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-15 20:16:02,151 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 20:16:02,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-15 20:16:02,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-15 20:16:02,152 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 4 states. [2019-11-15 20:16:02,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 20:16:02,230 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2019-11-15 20:16:02,231 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-15 20:16:02,231 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2019-11-15 20:16:02,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 20:16:02,232 INFO L225 Difference]: With dead ends: 20 [2019-11-15 20:16:02,232 INFO L226 Difference]: Without dead ends: 16 [2019-11-15 20:16:02,233 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-15 20:16:02,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-11-15 20:16:02,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-11-15 20:16:02,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-15 20:16:02,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2019-11-15 20:16:02,237 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 10 [2019-11-15 20:16:02,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 20:16:02,237 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2019-11-15 20:16:02,237 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-15 20:16:02,237 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2019-11-15 20:16:02,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-15 20:16:02,238 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 20:16:02,238 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 20:16:02,239 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 20:16:02,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 20:16:02,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1877408338, now seen corresponding path program 1 times [2019-11-15 20:16:02,239 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 20:16:02,240 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234119103] [2019-11-15 20:16:02,240 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:16:02,240 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:16:02,240 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 20:16:02,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:16:02,307 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 20:16:02,307 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234119103] [2019-11-15 20:16:02,308 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952577926] [2019-11-15 20:16:02,308 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b5515e52-b9dd-45db-b853-52b7190a6068/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 [2019-11-15 20:16:02,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:16:02,354 INFO L256 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-15 20:16:02,360 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 20:16:02,410 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 20:16:02,437 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 20:16:02,438 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 20:16:02,438 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2019-11-15 20:16:02,438 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606603702] [2019-11-15 20:16:02,439 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-15 20:16:02,439 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 20:16:02,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-15 20:16:02,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-15 20:16:02,440 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 8 states. [2019-11-15 20:16:02,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 20:16:02,567 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2019-11-15 20:16:02,568 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-15 20:16:02,568 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-11-15 20:16:02,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 20:16:02,571 INFO L225 Difference]: With dead ends: 39 [2019-11-15 20:16:02,571 INFO L226 Difference]: Without dead ends: 31 [2019-11-15 20:16:02,572 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2019-11-15 20:16:02,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-15 20:16:02,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 25. [2019-11-15 20:16:02,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-11-15 20:16:02,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2019-11-15 20:16:02,577 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 12 [2019-11-15 20:16:02,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 20:16:02,578 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2019-11-15 20:16:02,578 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-15 20:16:02,578 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2019-11-15 20:16:02,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-15 20:16:02,579 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 20:16:02,579 INFO L380 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 20:16:02,793 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 20:16:02,793 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 20:16:02,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 20:16:02,794 INFO L82 PathProgramCache]: Analyzing trace with hash -1654363901, now seen corresponding path program 2 times [2019-11-15 20:16:02,794 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 20:16:02,794 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341249676] [2019-11-15 20:16:02,794 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:16:02,794 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:16:02,794 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 20:16:02,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:16:02,926 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 20:16:02,926 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341249676] [2019-11-15 20:16:02,926 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512441752] [2019-11-15 20:16:02,926 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b5515e52-b9dd-45db-b853-52b7190a6068/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 [2019-11-15 20:16:02,974 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-15 20:16:02,974 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 20:16:02,976 INFO L256 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-15 20:16:02,977 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 20:16:03,094 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 20:16:03,117 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 20:16:03,118 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 20:16:03,118 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2019-11-15 20:16:03,118 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388827326] [2019-11-15 20:16:03,119 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-15 20:16:03,119 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 20:16:03,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-15 20:16:03,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2019-11-15 20:16:03,120 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 14 states. [2019-11-15 20:16:03,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 20:16:03,396 INFO L93 Difference]: Finished difference Result 87 states and 103 transitions. [2019-11-15 20:16:03,398 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-15 20:16:03,398 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2019-11-15 20:16:03,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 20:16:03,400 INFO L225 Difference]: With dead ends: 87 [2019-11-15 20:16:03,400 INFO L226 Difference]: Without dead ends: 73 [2019-11-15 20:16:03,402 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2019-11-15 20:16:03,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-11-15 20:16:03,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 46. [2019-11-15 20:16:03,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-11-15 20:16:03,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2019-11-15 20:16:03,420 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 18 [2019-11-15 20:16:03,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 20:16:03,421 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2019-11-15 20:16:03,421 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-15 20:16:03,421 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2019-11-15 20:16:03,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-15 20:16:03,423 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 20:16:03,423 INFO L380 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 20:16:03,627 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 20:16:03,630 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 20:16:03,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 20:16:03,630 INFO L82 PathProgramCache]: Analyzing trace with hash -1993982939, now seen corresponding path program 3 times [2019-11-15 20:16:03,631 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 20:16:03,631 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234696480] [2019-11-15 20:16:03,631 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:16:03,631 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:16:03,632 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 20:16:03,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:16:03,910 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 20:16:03,910 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234696480] [2019-11-15 20:16:03,911 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675704139] [2019-11-15 20:16:03,911 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b5515e52-b9dd-45db-b853-52b7190a6068/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 [2019-11-15 20:16:03,986 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2019-11-15 20:16:03,986 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 20:16:03,987 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-15 20:16:03,990 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 20:16:04,356 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 20:16:04,377 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 20:16:04,377 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 20:16:04,378 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2019-11-15 20:16:04,378 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303824889] [2019-11-15 20:16:04,379 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-11-15 20:16:04,379 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 20:16:04,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-11-15 20:16:04,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2019-11-15 20:16:04,380 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand 26 states. [2019-11-15 20:16:05,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 20:16:05,092 INFO L93 Difference]: Finished difference Result 207 states and 241 transitions. [2019-11-15 20:16:05,093 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-11-15 20:16:05,093 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2019-11-15 20:16:05,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 20:16:05,097 INFO L225 Difference]: With dead ends: 207 [2019-11-15 20:16:05,098 INFO L226 Difference]: Without dead ends: 181 [2019-11-15 20:16:05,099 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=473, Invalid=933, Unknown=0, NotChecked=0, Total=1406 [2019-11-15 20:16:05,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2019-11-15 20:16:05,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 88. [2019-11-15 20:16:05,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-11-15 20:16:05,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 100 transitions. [2019-11-15 20:16:05,113 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 100 transitions. Word has length 30 [2019-11-15 20:16:05,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 20:16:05,114 INFO L462 AbstractCegarLoop]: Abstraction has 88 states and 100 transitions. [2019-11-15 20:16:05,114 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-11-15 20:16:05,114 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 100 transitions. [2019-11-15 20:16:05,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-11-15 20:16:05,116 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 20:16:05,117 INFO L380 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 20:16:05,325 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 20:16:05,325 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 20:16:05,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 20:16:05,326 INFO L82 PathProgramCache]: Analyzing trace with hash -573736599, now seen corresponding path program 4 times [2019-11-15 20:16:05,326 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 20:16:05,326 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077888681] [2019-11-15 20:16:05,326 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:16:05,326 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:16:05,327 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 20:16:05,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:16:05,957 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 20:16:05,958 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077888681] [2019-11-15 20:16:05,959 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647859004] [2019-11-15 20:16:05,959 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b5515e52-b9dd-45db-b853-52b7190a6068/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 [2019-11-15 20:16:06,038 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-15 20:16:06,038 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 20:16:06,040 INFO L256 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 29 conjunts are in the unsatisfiable core [2019-11-15 20:16:06,043 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 20:16:07,173 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 20:16:07,208 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 20:16:07,209 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 20:16:07,209 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2019-11-15 20:16:07,209 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356700702] [2019-11-15 20:16:07,210 INFO L442 AbstractCegarLoop]: Interpolant automaton has 50 states [2019-11-15 20:16:07,210 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 20:16:07,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2019-11-15 20:16:07,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1133, Invalid=1317, Unknown=0, NotChecked=0, Total=2450 [2019-11-15 20:16:07,213 INFO L87 Difference]: Start difference. First operand 88 states and 100 transitions. Second operand 50 states. [2019-11-15 20:16:08,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 20:16:08,787 INFO L93 Difference]: Finished difference Result 555 states and 625 transitions. [2019-11-15 20:16:08,788 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2019-11-15 20:16:08,788 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 54 [2019-11-15 20:16:08,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 20:16:08,793 INFO L225 Difference]: With dead ends: 555 [2019-11-15 20:16:08,793 INFO L226 Difference]: Without dead ends: 505 [2019-11-15 20:16:08,798 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1805, Invalid=3597, Unknown=0, NotChecked=0, Total=5402 [2019-11-15 20:16:08,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2019-11-15 20:16:08,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 172. [2019-11-15 20:16:08,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2019-11-15 20:16:08,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 196 transitions. [2019-11-15 20:16:08,819 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 196 transitions. Word has length 54 [2019-11-15 20:16:08,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 20:16:08,820 INFO L462 AbstractCegarLoop]: Abstraction has 172 states and 196 transitions. [2019-11-15 20:16:08,820 INFO L463 AbstractCegarLoop]: Interpolant automaton has 50 states. [2019-11-15 20:16:08,820 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 196 transitions. [2019-11-15 20:16:08,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-11-15 20:16:08,825 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 20:16:08,825 INFO L380 BasicCegarLoop]: trace histogram [47, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 20:16:09,031 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 20:16:09,032 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 20:16:09,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 20:16:09,032 INFO L82 PathProgramCache]: Analyzing trace with hash -2121773071, now seen corresponding path program 5 times [2019-11-15 20:16:09,033 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 20:16:09,033 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190299993] [2019-11-15 20:16:09,033 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:16:09,033 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:16:09,034 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 20:16:09,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:16:10,790 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 20:16:10,791 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190299993] [2019-11-15 20:16:10,791 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473000132] [2019-11-15 20:16:10,791 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b5515e52-b9dd-45db-b853-52b7190a6068/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 [2019-11-15 20:16:10,972 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2019-11-15 20:16:10,972 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 20:16:10,975 INFO L256 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 53 conjunts are in the unsatisfiable core [2019-11-15 20:16:10,981 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 20:16:14,309 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 20:16:14,375 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 20:16:14,375 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 20:16:14,375 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 98 [2019-11-15 20:16:14,376 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867394328] [2019-11-15 20:16:14,376 INFO L442 AbstractCegarLoop]: Interpolant automaton has 98 states [2019-11-15 20:16:14,377 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 20:16:14,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2019-11-15 20:16:14,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4565, Invalid=4941, Unknown=0, NotChecked=0, Total=9506 [2019-11-15 20:16:14,383 INFO L87 Difference]: Start difference. First operand 172 states and 196 transitions. Second operand 98 states. [2019-11-15 20:16:18,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 20:16:18,968 INFO L93 Difference]: Finished difference Result 1683 states and 1825 transitions. [2019-11-15 20:16:18,969 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2019-11-15 20:16:18,969 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 102 [2019-11-15 20:16:18,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 20:16:18,979 INFO L225 Difference]: With dead ends: 1683 [2019-11-15 20:16:18,980 INFO L226 Difference]: Without dead ends: 1585 [2019-11-15 20:16:18,989 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1267 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=7061, Invalid=14109, Unknown=0, NotChecked=0, Total=21170 [2019-11-15 20:16:18,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1585 states. [2019-11-15 20:16:19,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1585 to 340. [2019-11-15 20:16:19,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 340 states. [2019-11-15 20:16:19,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 388 transitions. [2019-11-15 20:16:19,022 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 388 transitions. Word has length 102 [2019-11-15 20:16:19,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 20:16:19,022 INFO L462 AbstractCegarLoop]: Abstraction has 340 states and 388 transitions. [2019-11-15 20:16:19,023 INFO L463 AbstractCegarLoop]: Interpolant automaton has 98 states. [2019-11-15 20:16:19,023 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 388 transitions. [2019-11-15 20:16:19,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2019-11-15 20:16:19,033 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 20:16:19,033 INFO L380 BasicCegarLoop]: trace histogram [95, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 20:16:19,257 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 20:16:19,257 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 20:16:19,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 20:16:19,258 INFO L82 PathProgramCache]: Analyzing trace with hash -1147179775, now seen corresponding path program 6 times [2019-11-15 20:16:19,258 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 20:16:19,258 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871863358] [2019-11-15 20:16:19,258 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:16:19,258 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:16:19,259 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 20:16:19,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:16:23,882 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 20:16:23,882 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871863358] [2019-11-15 20:16:23,882 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204855348] [2019-11-15 20:16:23,882 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b5515e52-b9dd-45db-b853-52b7190a6068/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 [2019-11-15 20:16:24,253 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 95 check-sat command(s) [2019-11-15 20:16:24,254 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 20:16:24,259 INFO L256 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 101 conjunts are in the unsatisfiable core [2019-11-15 20:16:24,271 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 20:16:37,065 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 20:16:37,201 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 20:16:37,201 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 20:16:37,202 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 194 [2019-11-15 20:16:37,202 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082816446] [2019-11-15 20:16:37,203 INFO L442 AbstractCegarLoop]: Interpolant automaton has 194 states [2019-11-15 20:16:37,203 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 20:16:37,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 194 interpolants. [2019-11-15 20:16:37,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18341, Invalid=19101, Unknown=0, NotChecked=0, Total=37442 [2019-11-15 20:16:37,213 INFO L87 Difference]: Start difference. First operand 340 states and 388 transitions. Second operand 194 states. [2019-11-15 20:17:07,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 20:17:07,027 INFO L93 Difference]: Finished difference Result 5667 states and 5953 transitions. [2019-11-15 20:17:07,028 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 288 states. [2019-11-15 20:17:07,028 INFO L78 Accepts]: Start accepts. Automaton has 194 states. Word has length 198 [2019-11-15 20:17:07,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 20:17:07,056 INFO L225 Difference]: With dead ends: 5667 [2019-11-15 20:17:07,057 INFO L226 Difference]: Without dead ends: 5473 [2019-11-15 20:17:07,065 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 288 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4843 ImplicationChecksByTransitivity, 26.7s TimeCoverageRelationStatistics Valid=27941, Invalid=55869, Unknown=0, NotChecked=0, Total=83810 [2019-11-15 20:17:07,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5473 states. [2019-11-15 20:17:07,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5473 to 676. [2019-11-15 20:17:07,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 676 states. [2019-11-15 20:17:07,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 676 states to 676 states and 772 transitions. [2019-11-15 20:17:07,111 INFO L78 Accepts]: Start accepts. Automaton has 676 states and 772 transitions. Word has length 198 [2019-11-15 20:17:07,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 20:17:07,112 INFO L462 AbstractCegarLoop]: Abstraction has 676 states and 772 transitions. [2019-11-15 20:17:07,112 INFO L463 AbstractCegarLoop]: Interpolant automaton has 194 states. [2019-11-15 20:17:07,112 INFO L276 IsEmpty]: Start isEmpty. Operand 676 states and 772 transitions. [2019-11-15 20:17:07,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2019-11-15 20:17:07,122 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 20:17:07,123 INFO L380 BasicCegarLoop]: trace histogram [191, 190, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 20:17:07,333 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 20:17:07,333 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 20:17:07,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 20:17:07,334 INFO L82 PathProgramCache]: Analyzing trace with hash -506239199, now seen corresponding path program 7 times [2019-11-15 20:17:07,334 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 20:17:07,334 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490844403] [2019-11-15 20:17:07,334 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:17:07,334 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:17:07,334 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 20:17:07,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:17:08,314 INFO L134 CoverageAnalysis]: Checked inductivity of 36290 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36290 trivial. 0 not checked. [2019-11-15 20:17:08,314 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490844403] [2019-11-15 20:17:08,314 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 20:17:08,315 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-15 20:17:08,315 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507063794] [2019-11-15 20:17:08,316 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-15 20:17:08,316 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 20:17:08,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-15 20:17:08,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-15 20:17:08,317 INFO L87 Difference]: Start difference. First operand 676 states and 772 transitions. Second operand 5 states. [2019-11-15 20:17:08,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 20:17:08,369 INFO L93 Difference]: Finished difference Result 1060 states and 1156 transitions. [2019-11-15 20:17:08,369 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-15 20:17:08,370 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 390 [2019-11-15 20:17:08,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 20:17:08,374 INFO L225 Difference]: With dead ends: 1060 [2019-11-15 20:17:08,374 INFO L226 Difference]: Without dead ends: 673 [2019-11-15 20:17:08,376 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-15 20:17:08,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2019-11-15 20:17:08,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 673. [2019-11-15 20:17:08,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 673 states. [2019-11-15 20:17:08,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 673 states to 673 states and 768 transitions. [2019-11-15 20:17:08,390 INFO L78 Accepts]: Start accepts. Automaton has 673 states and 768 transitions. Word has length 390 [2019-11-15 20:17:08,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 20:17:08,390 INFO L462 AbstractCegarLoop]: Abstraction has 673 states and 768 transitions. [2019-11-15 20:17:08,391 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-15 20:17:08,391 INFO L276 IsEmpty]: Start isEmpty. Operand 673 states and 768 transitions. [2019-11-15 20:17:08,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2019-11-15 20:17:08,398 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 20:17:08,399 INFO L380 BasicCegarLoop]: trace histogram [190, 189, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 20:17:08,399 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 20:17:08,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 20:17:08,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1057535531, now seen corresponding path program 1 times [2019-11-15 20:17:08,400 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 20:17:08,400 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35554798] [2019-11-15 20:17:08,400 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:17:08,401 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:17:08,401 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 20:17:08,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:17:09,273 INFO L134 CoverageAnalysis]: Checked inductivity of 35912 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 35910 trivial. 0 not checked. [2019-11-15 20:17:09,274 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35554798] [2019-11-15 20:17:09,274 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493848062] [2019-11-15 20:17:09,275 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b5515e52-b9dd-45db-b853-52b7190a6068/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 [2019-11-15 20:17:09,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:17:09,632 INFO L256 TraceCheckSpWp]: Trace formula consists of 1540 conjuncts, 191 conjunts are in the unsatisfiable core [2019-11-15 20:17:09,646 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 20:17:27,585 INFO L134 CoverageAnalysis]: Checked inductivity of 35912 backedges. 35910 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-15 20:17:27,585 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-15 20:17:27,586 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [192] imperfect sequences [6] total 196 [2019-11-15 20:17:27,586 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805198706] [2019-11-15 20:17:27,587 INFO L442 AbstractCegarLoop]: Interpolant automaton has 192 states [2019-11-15 20:17:27,588 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 20:17:27,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 192 interpolants. [2019-11-15 20:17:27,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18345, Invalid=19875, Unknown=0, NotChecked=0, Total=38220 [2019-11-15 20:17:27,594 INFO L87 Difference]: Start difference. First operand 673 states and 768 transitions. Second operand 192 states. [2019-11-15 20:17:30,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 20:17:30,027 INFO L93 Difference]: Finished difference Result 27572 states and 27756 transitions. [2019-11-15 20:17:30,027 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2019-11-15 20:17:30,027 INFO L78 Accepts]: Start accepts. Automaton has 192 states. Word has length 390 [2019-11-15 20:17:30,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 20:17:30,033 INFO L225 Difference]: With dead ends: 27572 [2019-11-15 20:17:30,034 INFO L226 Difference]: Without dead ends: 1199 [2019-11-15 20:17:30,056 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 584 GetRequests, 390 SyntacticMatches, 0 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 17.7s TimeCoverageRelationStatistics Valid=18345, Invalid=19875, Unknown=0, NotChecked=0, Total=38220 [2019-11-15 20:17:30,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1199 states. [2019-11-15 20:17:30,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1199 to 1183. [2019-11-15 20:17:30,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1183 states. [2019-11-15 20:17:30,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1183 states to 1183 states and 1191 transitions. [2019-11-15 20:17:30,081 INFO L78 Accepts]: Start accepts. Automaton has 1183 states and 1191 transitions. Word has length 390 [2019-11-15 20:17:30,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 20:17:30,082 INFO L462 AbstractCegarLoop]: Abstraction has 1183 states and 1191 transitions. [2019-11-15 20:17:30,082 INFO L463 AbstractCegarLoop]: Interpolant automaton has 192 states. [2019-11-15 20:17:30,082 INFO L276 IsEmpty]: Start isEmpty. Operand 1183 states and 1191 transitions. [2019-11-15 20:17:30,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2019-11-15 20:17:30,090 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 20:17:30,091 INFO L380 BasicCegarLoop]: trace histogram [100, 99, 92, 91, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 20:17:30,295 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 20:17:30,295 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 20:17:30,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 20:17:30,296 INFO L82 PathProgramCache]: Analyzing trace with hash 1809212719, now seen corresponding path program 2 times [2019-11-15 20:17:30,297 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 20:17:30,297 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603030919] [2019-11-15 20:17:30,297 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:17:30,297 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:17:30,298 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 20:17:30,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:17:48,638 INFO L134 CoverageAnalysis]: Checked inductivity of 18272 backedges. 0 proven. 18272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 20:17:48,638 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603030919] [2019-11-15 20:17:48,638 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18846548] [2019-11-15 20:17:48,639 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b5515e52-b9dd-45db-b853-52b7190a6068/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 [2019-11-15 20:17:48,950 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-15 20:17:48,950 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 20:17:48,958 INFO L256 TraceCheckSpWp]: Trace formula consists of 1360 conjuncts, 197 conjunts are in the unsatisfiable core [2019-11-15 20:17:48,967 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 20:17:49,028 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 20:17:49,357 INFO L134 CoverageAnalysis]: Checked inductivity of 18272 backedges. 0 proven. 18272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 20:17:49,357 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 20:17:49,358 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [194, 194] total 195 [2019-11-15 20:17:49,358 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817525038] [2019-11-15 20:17:49,359 INFO L442 AbstractCegarLoop]: Interpolant automaton has 195 states [2019-11-15 20:17:49,359 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 20:17:49,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 195 interpolants. [2019-11-15 20:17:49,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18533, Invalid=19297, Unknown=0, NotChecked=0, Total=37830 [2019-11-15 20:17:49,364 INFO L87 Difference]: Start difference. First operand 1183 states and 1191 transitions. Second operand 195 states. [2019-11-15 20:18:02,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 20:18:02,021 INFO L93 Difference]: Finished difference Result 2239 states and 2346 transitions. [2019-11-15 20:18:02,021 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 194 states. [2019-11-15 20:18:02,021 INFO L78 Accepts]: Start accepts. Automaton has 195 states. Word has length 390 [2019-11-15 20:18:02,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 20:18:02,031 INFO L225 Difference]: With dead ends: 2239 [2019-11-15 20:18:02,031 INFO L226 Difference]: Without dead ends: 2034 [2019-11-15 20:18:02,034 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 584 GetRequests, 390 SyntacticMatches, 0 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 17.9s TimeCoverageRelationStatistics Valid=18538, Invalid=19682, Unknown=0, NotChecked=0, Total=38220 [2019-11-15 20:18:02,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2034 states. [2019-11-15 20:18:02,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2034 to 1185. [2019-11-15 20:18:02,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1185 states. [2019-11-15 20:18:02,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1185 states to 1185 states and 1193 transitions. [2019-11-15 20:18:02,064 INFO L78 Accepts]: Start accepts. Automaton has 1185 states and 1193 transitions. Word has length 390 [2019-11-15 20:18:02,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 20:18:02,065 INFO L462 AbstractCegarLoop]: Abstraction has 1185 states and 1193 transitions. [2019-11-15 20:18:02,065 INFO L463 AbstractCegarLoop]: Interpolant automaton has 195 states. [2019-11-15 20:18:02,065 INFO L276 IsEmpty]: Start isEmpty. Operand 1185 states and 1193 transitions. [2019-11-15 20:18:02,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2019-11-15 20:18:02,075 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 20:18:02,076 INFO L380 BasicCegarLoop]: trace histogram [100, 99, 93, 92, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 20:18:02,280 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 20:18:02,281 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 20:18:02,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 20:18:02,281 INFO L82 PathProgramCache]: Analyzing trace with hash 744709876, now seen corresponding path program 3 times [2019-11-15 20:18:02,281 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 20:18:02,281 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326925946] [2019-11-15 20:18:02,282 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:18:02,282 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:18:02,282 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 20:18:02,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:18:20,117 INFO L134 CoverageAnalysis]: Checked inductivity of 18456 backedges. 0 proven. 18456 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 20:18:20,117 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326925946] [2019-11-15 20:18:20,118 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073185071] [2019-11-15 20:18:20,118 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b5515e52-b9dd-45db-b853-52b7190a6068/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 [2019-11-15 20:18:20,744 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 100 check-sat command(s) [2019-11-15 20:18:20,745 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 20:18:20,751 INFO L256 TraceCheckSpWp]: Trace formula consists of 1366 conjuncts, 198 conjunts are in the unsatisfiable core [2019-11-15 20:18:20,760 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 20:18:20,806 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 20:18:21,046 INFO L134 CoverageAnalysis]: Checked inductivity of 18456 backedges. 0 proven. 18456 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 20:18:21,046 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 20:18:21,047 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [195, 195] total 196 [2019-11-15 20:18:21,047 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839350570] [2019-11-15 20:18:21,049 INFO L442 AbstractCegarLoop]: Interpolant automaton has 196 states [2019-11-15 20:18:21,049 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 20:18:21,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 196 interpolants. [2019-11-15 20:18:21,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18726, Invalid=19494, Unknown=0, NotChecked=0, Total=38220 [2019-11-15 20:18:21,055 INFO L87 Difference]: Start difference. First operand 1185 states and 1193 transitions. Second operand 196 states. [2019-11-15 20:18:29,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 20:18:29,894 INFO L93 Difference]: Finished difference Result 2055 states and 2162 transitions. [2019-11-15 20:18:29,895 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 195 states. [2019-11-15 20:18:29,895 INFO L78 Accepts]: Start accepts. Automaton has 196 states. Word has length 392 [2019-11-15 20:18:29,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 20:18:29,905 INFO L225 Difference]: With dead ends: 2055 [2019-11-15 20:18:29,905 INFO L226 Difference]: Without dead ends: 1850 [2019-11-15 20:18:29,907 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 587 GetRequests, 392 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 17.5s TimeCoverageRelationStatistics Valid=18731, Invalid=19881, Unknown=0, NotChecked=0, Total=38612 [2019-11-15 20:18:29,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1850 states. [2019-11-15 20:18:29,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1850 to 1187. [2019-11-15 20:18:29,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1187 states. [2019-11-15 20:18:29,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1187 states to 1187 states and 1195 transitions. [2019-11-15 20:18:29,935 INFO L78 Accepts]: Start accepts. Automaton has 1187 states and 1195 transitions. Word has length 392 [2019-11-15 20:18:29,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 20:18:29,935 INFO L462 AbstractCegarLoop]: Abstraction has 1187 states and 1195 transitions. [2019-11-15 20:18:29,936 INFO L463 AbstractCegarLoop]: Interpolant automaton has 196 states. [2019-11-15 20:18:29,936 INFO L276 IsEmpty]: Start isEmpty. Operand 1187 states and 1195 transitions. [2019-11-15 20:18:29,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 395 [2019-11-15 20:18:29,940 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 20:18:29,940 INFO L380 BasicCegarLoop]: trace histogram [100, 99, 94, 93, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 20:18:30,146 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 20:18:30,146 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 20:18:30,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 20:18:30,147 INFO L82 PathProgramCache]: Analyzing trace with hash -40305799, now seen corresponding path program 4 times [2019-11-15 20:18:30,147 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 20:18:30,147 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614085129] [2019-11-15 20:18:30,147 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:18:30,147 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:18:30,147 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 20:18:30,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:18:48,672 INFO L134 CoverageAnalysis]: Checked inductivity of 18642 backedges. 0 proven. 18642 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 20:18:48,673 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614085129] [2019-11-15 20:18:48,673 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170754949] [2019-11-15 20:18:48,673 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b5515e52-b9dd-45db-b853-52b7190a6068/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 [2019-11-15 20:18:49,004 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-15 20:18:49,005 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 20:18:49,012 INFO L256 TraceCheckSpWp]: Trace formula consists of 1372 conjuncts, 199 conjunts are in the unsatisfiable core [2019-11-15 20:18:49,020 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 20:18:49,067 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 20:18:49,409 INFO L134 CoverageAnalysis]: Checked inductivity of 18642 backedges. 0 proven. 18642 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 20:18:49,410 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 20:18:49,410 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [196, 196] total 197 [2019-11-15 20:18:49,411 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476971529] [2019-11-15 20:18:49,412 INFO L442 AbstractCegarLoop]: Interpolant automaton has 197 states [2019-11-15 20:18:49,412 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 20:18:49,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 197 interpolants. [2019-11-15 20:18:49,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18920, Invalid=19692, Unknown=0, NotChecked=0, Total=38612 [2019-11-15 20:18:49,417 INFO L87 Difference]: Start difference. First operand 1187 states and 1195 transitions. Second operand 197 states. [2019-11-15 20:18:58,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 20:18:58,730 INFO L93 Difference]: Finished difference Result 1869 states and 1976 transitions. [2019-11-15 20:18:58,730 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 196 states. [2019-11-15 20:18:58,731 INFO L78 Accepts]: Start accepts. Automaton has 197 states. Word has length 394 [2019-11-15 20:18:58,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 20:18:58,737 INFO L225 Difference]: With dead ends: 1869 [2019-11-15 20:18:58,738 INFO L226 Difference]: Without dead ends: 1664 [2019-11-15 20:18:58,739 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 590 GetRequests, 394 SyntacticMatches, 0 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 18.1s TimeCoverageRelationStatistics Valid=18925, Invalid=20081, Unknown=0, NotChecked=0, Total=39006 [2019-11-15 20:18:58,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1664 states. [2019-11-15 20:18:58,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1664 to 1189. [2019-11-15 20:18:58,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1189 states. [2019-11-15 20:18:58,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1189 states to 1189 states and 1197 transitions. [2019-11-15 20:18:58,762 INFO L78 Accepts]: Start accepts. Automaton has 1189 states and 1197 transitions. Word has length 394 [2019-11-15 20:18:58,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 20:18:58,763 INFO L462 AbstractCegarLoop]: Abstraction has 1189 states and 1197 transitions. [2019-11-15 20:18:58,763 INFO L463 AbstractCegarLoop]: Interpolant automaton has 197 states. [2019-11-15 20:18:58,764 INFO L276 IsEmpty]: Start isEmpty. Operand 1189 states and 1197 transitions. [2019-11-15 20:18:58,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 397 [2019-11-15 20:18:58,768 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 20:18:58,768 INFO L380 BasicCegarLoop]: trace histogram [100, 99, 95, 94, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 20:18:58,973 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 20:18:58,974 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 20:18:58,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 20:18:58,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1473874622, now seen corresponding path program 5 times [2019-11-15 20:18:58,974 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 20:18:58,974 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211749474] [2019-11-15 20:18:58,975 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:18:58,975 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:18:58,975 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 20:18:59,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:19:17,137 INFO L134 CoverageAnalysis]: Checked inductivity of 18830 backedges. 0 proven. 18830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 20:19:17,138 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211749474] [2019-11-15 20:19:17,138 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141903639] [2019-11-15 20:19:17,138 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b5515e52-b9dd-45db-b853-52b7190a6068/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 [2019-11-15 20:19:17,725 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 100 check-sat command(s) [2019-11-15 20:19:17,726 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 20:19:17,734 INFO L256 TraceCheckSpWp]: Trace formula consists of 1378 conjuncts, 200 conjunts are in the unsatisfiable core [2019-11-15 20:19:17,741 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 20:19:17,786 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 20:19:18,147 INFO L134 CoverageAnalysis]: Checked inductivity of 18830 backedges. 0 proven. 18830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 20:19:18,148 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 20:19:18,148 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [197, 197] total 198 [2019-11-15 20:19:18,148 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933864435] [2019-11-15 20:19:18,150 INFO L442 AbstractCegarLoop]: Interpolant automaton has 198 states [2019-11-15 20:19:18,150 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 20:19:18,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 198 interpolants. [2019-11-15 20:19:18,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19115, Invalid=19891, Unknown=0, NotChecked=0, Total=39006 [2019-11-15 20:19:18,154 INFO L87 Difference]: Start difference. First operand 1189 states and 1197 transitions. Second operand 198 states. [2019-11-15 20:19:30,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 20:19:30,491 INFO L93 Difference]: Finished difference Result 1681 states and 1788 transitions. [2019-11-15 20:19:30,492 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 197 states. [2019-11-15 20:19:30,492 INFO L78 Accepts]: Start accepts. Automaton has 198 states. Word has length 396 [2019-11-15 20:19:30,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 20:19:30,498 INFO L225 Difference]: With dead ends: 1681 [2019-11-15 20:19:30,498 INFO L226 Difference]: Without dead ends: 1476 [2019-11-15 20:19:30,500 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 593 GetRequests, 396 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 17.9s TimeCoverageRelationStatistics Valid=19120, Invalid=20282, Unknown=0, NotChecked=0, Total=39402 [2019-11-15 20:19:30,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1476 states. [2019-11-15 20:19:30,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1476 to 1191. [2019-11-15 20:19:30,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1191 states. [2019-11-15 20:19:30,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1191 states to 1191 states and 1199 transitions. [2019-11-15 20:19:30,521 INFO L78 Accepts]: Start accepts. Automaton has 1191 states and 1199 transitions. Word has length 396 [2019-11-15 20:19:30,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 20:19:30,522 INFO L462 AbstractCegarLoop]: Abstraction has 1191 states and 1199 transitions. [2019-11-15 20:19:30,522 INFO L463 AbstractCegarLoop]: Interpolant automaton has 198 states. [2019-11-15 20:19:30,522 INFO L276 IsEmpty]: Start isEmpty. Operand 1191 states and 1199 transitions. [2019-11-15 20:19:30,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 399 [2019-11-15 20:19:30,526 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 20:19:30,527 INFO L380 BasicCegarLoop]: trace histogram [100, 99, 96, 95, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 20:19:30,733 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 20:19:30,733 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 20:19:30,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 20:19:30,733 INFO L82 PathProgramCache]: Analyzing trace with hash 607345859, now seen corresponding path program 6 times [2019-11-15 20:19:30,734 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 20:19:30,734 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507722240] [2019-11-15 20:19:30,734 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:19:30,734 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:19:30,734 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 20:19:30,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:19:48,695 INFO L134 CoverageAnalysis]: Checked inductivity of 19020 backedges. 0 proven. 19020 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 20:19:48,696 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507722240] [2019-11-15 20:19:48,696 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918389287] [2019-11-15 20:19:48,696 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b5515e52-b9dd-45db-b853-52b7190a6068/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 [2019-11-15 20:19:49,307 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 100 check-sat command(s) [2019-11-15 20:19:49,307 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 20:19:49,317 INFO L256 TraceCheckSpWp]: Trace formula consists of 1384 conjuncts, 201 conjunts are in the unsatisfiable core [2019-11-15 20:19:49,327 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 20:19:49,368 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 20:19:49,656 INFO L134 CoverageAnalysis]: Checked inductivity of 19020 backedges. 0 proven. 19020 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 20:19:49,656 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 20:19:49,656 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [198, 198] total 199 [2019-11-15 20:19:49,657 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939283600] [2019-11-15 20:19:49,658 INFO L442 AbstractCegarLoop]: Interpolant automaton has 199 states [2019-11-15 20:19:49,658 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 20:19:49,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 199 interpolants. [2019-11-15 20:19:49,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19311, Invalid=20091, Unknown=0, NotChecked=0, Total=39402 [2019-11-15 20:19:49,661 INFO L87 Difference]: Start difference. First operand 1191 states and 1199 transitions. Second operand 199 states. [2019-11-15 20:19:58,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 20:19:58,715 INFO L93 Difference]: Finished difference Result 1491 states and 1597 transitions. [2019-11-15 20:19:58,716 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 198 states. [2019-11-15 20:19:58,716 INFO L78 Accepts]: Start accepts. Automaton has 199 states. Word has length 398 [2019-11-15 20:19:58,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 20:19:58,721 INFO L225 Difference]: With dead ends: 1491 [2019-11-15 20:19:58,721 INFO L226 Difference]: Without dead ends: 1286 [2019-11-15 20:19:58,723 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 596 GetRequests, 398 SyntacticMatches, 0 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 17.7s TimeCoverageRelationStatistics Valid=19316, Invalid=20484, Unknown=0, NotChecked=0, Total=39800 [2019-11-15 20:19:58,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1286 states. [2019-11-15 20:19:58,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1286 to 998. [2019-11-15 20:19:58,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 998 states. [2019-11-15 20:19:58,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 998 states to 998 states and 1004 transitions. [2019-11-15 20:19:58,739 INFO L78 Accepts]: Start accepts. Automaton has 998 states and 1004 transitions. Word has length 398 [2019-11-15 20:19:58,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 20:19:58,739 INFO L462 AbstractCegarLoop]: Abstraction has 998 states and 1004 transitions. [2019-11-15 20:19:58,739 INFO L463 AbstractCegarLoop]: Interpolant automaton has 199 states. [2019-11-15 20:19:58,740 INFO L276 IsEmpty]: Start isEmpty. Operand 998 states and 1004 transitions. [2019-11-15 20:19:58,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 401 [2019-11-15 20:19:58,744 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 20:19:58,744 INFO L380 BasicCegarLoop]: trace histogram [100, 99, 97, 96, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 20:19:58,950 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 20:19:58,950 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 20:19:58,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 20:19:58,951 INFO L82 PathProgramCache]: Analyzing trace with hash 1096860040, now seen corresponding path program 7 times [2019-11-15 20:19:58,951 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 20:19:58,951 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689694294] [2019-11-15 20:19:58,951 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:19:58,951 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:19:58,951 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 20:19:59,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:20:17,347 INFO L134 CoverageAnalysis]: Checked inductivity of 19212 backedges. 0 proven. 19212 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 20:20:17,348 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689694294] [2019-11-15 20:20:17,348 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868732000] [2019-11-15 20:20:17,348 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b5515e52-b9dd-45db-b853-52b7190a6068/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 [2019-11-15 20:20:17,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:20:17,681 INFO L256 TraceCheckSpWp]: Trace formula consists of 1390 conjuncts, 202 conjunts are in the unsatisfiable core [2019-11-15 20:20:17,686 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 20:20:17,732 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 20:20:18,038 INFO L134 CoverageAnalysis]: Checked inductivity of 19212 backedges. 0 proven. 19212 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 20:20:18,039 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 20:20:18,039 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [199, 199] total 200 [2019-11-15 20:20:18,039 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486835706] [2019-11-15 20:20:18,040 INFO L442 AbstractCegarLoop]: Interpolant automaton has 200 states [2019-11-15 20:20:18,040 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 20:20:18,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 200 interpolants. [2019-11-15 20:20:18,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19508, Invalid=20292, Unknown=0, NotChecked=0, Total=39800 [2019-11-15 20:20:18,044 INFO L87 Difference]: Start difference. First operand 998 states and 1004 transitions. Second operand 200 states. [2019-11-15 20:20:29,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 20:20:29,119 INFO L93 Difference]: Finished difference Result 1299 states and 1403 transitions. [2019-11-15 20:20:29,119 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 199 states. [2019-11-15 20:20:29,119 INFO L78 Accepts]: Start accepts. Automaton has 200 states. Word has length 400 [2019-11-15 20:20:29,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 20:20:29,126 INFO L225 Difference]: With dead ends: 1299 [2019-11-15 20:20:29,127 INFO L226 Difference]: Without dead ends: 1094 [2019-11-15 20:20:29,128 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 599 GetRequests, 400 SyntacticMatches, 0 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 18.1s TimeCoverageRelationStatistics Valid=19513, Invalid=20687, Unknown=0, NotChecked=0, Total=40200 [2019-11-15 20:20:29,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1094 states. [2019-11-15 20:20:29,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1094 to 803. [2019-11-15 20:20:29,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 803 states. [2019-11-15 20:20:29,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 807 transitions. [2019-11-15 20:20:29,144 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 807 transitions. Word has length 400 [2019-11-15 20:20:29,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 20:20:29,144 INFO L462 AbstractCegarLoop]: Abstraction has 803 states and 807 transitions. [2019-11-15 20:20:29,145 INFO L463 AbstractCegarLoop]: Interpolant automaton has 200 states. [2019-11-15 20:20:29,145 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 807 transitions. [2019-11-15 20:20:29,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 403 [2019-11-15 20:20:29,148 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 20:20:29,149 INFO L380 BasicCegarLoop]: trace histogram [100, 99, 98, 97, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 20:20:29,354 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 20:20:29,354 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 20:20:29,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 20:20:29,355 INFO L82 PathProgramCache]: Analyzing trace with hash -926414579, now seen corresponding path program 8 times [2019-11-15 20:20:29,355 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 20:20:29,355 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465234501] [2019-11-15 20:20:29,356 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:20:29,356 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:20:29,356 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 20:20:29,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:20:47,955 INFO L134 CoverageAnalysis]: Checked inductivity of 19406 backedges. 0 proven. 19406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 20:20:47,955 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465234501] [2019-11-15 20:20:47,955 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448447397] [2019-11-15 20:20:47,956 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b5515e52-b9dd-45db-b853-52b7190a6068/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 [2019-11-15 20:20:48,330 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-15 20:20:48,330 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 20:20:48,337 INFO L256 TraceCheckSpWp]: Trace formula consists of 1396 conjuncts, 203 conjunts are in the unsatisfiable core [2019-11-15 20:20:48,344 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 20:20:48,388 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 20:20:48,756 INFO L134 CoverageAnalysis]: Checked inductivity of 19406 backedges. 0 proven. 19406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 20:20:48,757 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 20:20:48,757 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [200, 200] total 201 [2019-11-15 20:20:48,757 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850191736] [2019-11-15 20:20:48,758 INFO L442 AbstractCegarLoop]: Interpolant automaton has 201 states [2019-11-15 20:20:48,759 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 20:20:48,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 201 interpolants. [2019-11-15 20:20:48,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19706, Invalid=20494, Unknown=0, NotChecked=0, Total=40200 [2019-11-15 20:20:48,762 INFO L87 Difference]: Start difference. First operand 803 states and 807 transitions. Second operand 201 states. [2019-11-15 20:20:56,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 20:20:56,841 INFO L93 Difference]: Finished difference Result 1105 states and 1207 transitions. [2019-11-15 20:20:56,841 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 200 states. [2019-11-15 20:20:56,841 INFO L78 Accepts]: Start accepts. Automaton has 201 states. Word has length 402 [2019-11-15 20:20:56,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 20:20:56,846 INFO L225 Difference]: With dead ends: 1105 [2019-11-15 20:20:56,846 INFO L226 Difference]: Without dead ends: 900 [2019-11-15 20:20:56,847 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 602 GetRequests, 402 SyntacticMatches, 0 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 18.4s TimeCoverageRelationStatistics Valid=19711, Invalid=20891, Unknown=0, NotChecked=0, Total=40602 [2019-11-15 20:20:56,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 900 states. [2019-11-15 20:20:56,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 900 to 606. [2019-11-15 20:20:56,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 606 states. [2019-11-15 20:20:56,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 608 transitions. [2019-11-15 20:20:56,867 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 608 transitions. Word has length 402 [2019-11-15 20:20:56,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 20:20:56,868 INFO L462 AbstractCegarLoop]: Abstraction has 606 states and 608 transitions. [2019-11-15 20:20:56,868 INFO L463 AbstractCegarLoop]: Interpolant automaton has 201 states. [2019-11-15 20:20:56,868 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 608 transitions. [2019-11-15 20:20:56,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 405 [2019-11-15 20:20:56,872 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 20:20:56,872 INFO L380 BasicCegarLoop]: trace histogram [100, 99, 99, 98, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 20:20:57,078 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 20:20:57,081 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 20:20:57,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 20:20:57,081 INFO L82 PathProgramCache]: Analyzing trace with hash 326861650, now seen corresponding path program 9 times [2019-11-15 20:20:57,081 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 20:20:57,081 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139005928] [2019-11-15 20:20:57,082 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:20:57,082 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:20:57,082 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 20:20:57,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:21:16,203 INFO L134 CoverageAnalysis]: Checked inductivity of 19602 backedges. 0 proven. 19602 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 20:21:16,204 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139005928] [2019-11-15 20:21:16,204 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481329148] [2019-11-15 20:21:16,204 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b5515e52-b9dd-45db-b853-52b7190a6068/bin/uautomizer/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 20:21:16,893 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 100 check-sat command(s) [2019-11-15 20:21:16,893 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 20:21:16,901 INFO L256 TraceCheckSpWp]: Trace formula consists of 1402 conjuncts, 204 conjunts are in the unsatisfiable core [2019-11-15 20:21:16,907 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 20:21:16,952 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 20:21:17,327 INFO L134 CoverageAnalysis]: Checked inductivity of 19602 backedges. 0 proven. 19602 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 20:21:17,327 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 20:21:17,327 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [201, 201] total 202 [2019-11-15 20:21:17,327 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107727010] [2019-11-15 20:21:17,328 INFO L442 AbstractCegarLoop]: Interpolant automaton has 202 states [2019-11-15 20:21:17,328 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 20:21:17,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 202 interpolants. [2019-11-15 20:21:17,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19905, Invalid=20697, Unknown=0, NotChecked=0, Total=40602 [2019-11-15 20:21:17,331 INFO L87 Difference]: Start difference. First operand 606 states and 608 transitions. Second operand 202 states. [2019-11-15 20:21:25,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 20:21:25,911 INFO L93 Difference]: Finished difference Result 909 states and 1009 transitions. [2019-11-15 20:21:25,911 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 201 states. [2019-11-15 20:21:25,911 INFO L78 Accepts]: Start accepts. Automaton has 202 states. Word has length 404 [2019-11-15 20:21:25,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 20:21:25,914 INFO L225 Difference]: With dead ends: 909 [2019-11-15 20:21:25,914 INFO L226 Difference]: Without dead ends: 704 [2019-11-15 20:21:25,916 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 605 GetRequests, 404 SyntacticMatches, 0 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 18.8s TimeCoverageRelationStatistics Valid=19910, Invalid=21096, Unknown=0, NotChecked=0, Total=41006 [2019-11-15 20:21:25,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2019-11-15 20:21:25,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 407. [2019-11-15 20:21:25,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 407 states. [2019-11-15 20:21:25,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 407 transitions. [2019-11-15 20:21:25,924 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 407 transitions. Word has length 404 [2019-11-15 20:21:25,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 20:21:25,925 INFO L462 AbstractCegarLoop]: Abstraction has 407 states and 407 transitions. [2019-11-15 20:21:25,925 INFO L463 AbstractCegarLoop]: Interpolant automaton has 202 states. [2019-11-15 20:21:25,925 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 407 transitions. [2019-11-15 20:21:25,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 407 [2019-11-15 20:21:25,928 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 20:21:25,928 INFO L380 BasicCegarLoop]: trace histogram [100, 100, 99, 99, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 20:21:26,135 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 20:21:26,135 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 20:21:26,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 20:21:26,136 INFO L82 PathProgramCache]: Analyzing trace with hash 2134474839, now seen corresponding path program 10 times [2019-11-15 20:21:26,136 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 20:21:26,136 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269554669] [2019-11-15 20:21:26,136 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:21:26,137 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:21:26,137 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 20:21:26,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:21:45,518 INFO L134 CoverageAnalysis]: Checked inductivity of 19800 backedges. 0 proven. 19800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 20:21:45,518 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269554669] [2019-11-15 20:21:45,519 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988557822] [2019-11-15 20:21:45,519 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b5515e52-b9dd-45db-b853-52b7190a6068/bin/uautomizer/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 20:21:45,914 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-15 20:21:45,915 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 20:21:45,928 INFO L256 TraceCheckSpWp]: Trace formula consists of 1408 conjuncts, 205 conjunts are in the unsatisfiable core [2019-11-15 20:21:45,935 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 20:21:45,977 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 20:21:46,364 INFO L134 CoverageAnalysis]: Checked inductivity of 19800 backedges. 0 proven. 19800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 20:21:46,365 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 20:21:46,365 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [202, 202] total 203 [2019-11-15 20:21:46,365 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879067527] [2019-11-15 20:21:46,367 INFO L442 AbstractCegarLoop]: Interpolant automaton has 203 states [2019-11-15 20:21:46,368 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 20:21:46,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2019-11-15 20:21:46,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20105, Invalid=20901, Unknown=0, NotChecked=0, Total=41006 [2019-11-15 20:21:46,372 INFO L87 Difference]: Start difference. First operand 407 states and 407 transitions. Second operand 203 states. [2019-11-15 20:21:55,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 20:21:55,375 INFO L93 Difference]: Finished difference Result 707 states and 807 transitions. [2019-11-15 20:21:55,375 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2019-11-15 20:21:55,375 INFO L78 Accepts]: Start accepts. Automaton has 203 states. Word has length 406 [2019-11-15 20:21:55,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 20:21:55,376 INFO L225 Difference]: With dead ends: 707 [2019-11-15 20:21:55,376 INFO L226 Difference]: Without dead ends: 0 [2019-11-15 20:21:55,377 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 608 GetRequests, 406 SyntacticMatches, 0 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 19.1s TimeCoverageRelationStatistics Valid=20110, Invalid=21302, Unknown=0, NotChecked=0, Total=41412 [2019-11-15 20:21:55,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-15 20:21:55,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-15 20:21:55,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-15 20:21:55,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-15 20:21:55,378 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 406 [2019-11-15 20:21:55,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 20:21:55,378 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-15 20:21:55,378 INFO L463 AbstractCegarLoop]: Interpolant automaton has 203 states. [2019-11-15 20:21:55,378 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-15 20:21:55,378 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-15 20:21:55,579 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 20:21:55,583 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-11-15 20:21:55,596 INFO L446 ceAbstractionStarter]: At program point L27(lines 10 28) the Hoare annotation is: true [2019-11-15 20:21:55,596 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2019-11-15 20:21:55,596 INFO L443 ceAbstractionStarter]: For program point L15(lines 15 17) no Hoare annotation was computed. [2019-11-15 20:21:55,596 INFO L443 ceAbstractionStarter]: For program point L15-2(lines 14 17) no Hoare annotation was computed. [2019-11-15 20:21:55,596 INFO L443 ceAbstractionStarter]: For program point L15-3(lines 10 28) no Hoare annotation was computed. [2019-11-15 20:21:55,596 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-11-15 20:21:55,596 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-11-15 20:21:55,597 INFO L443 ceAbstractionStarter]: For program point L12(lines 12 13) no Hoare annotation was computed. [2019-11-15 20:21:55,597 INFO L443 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2019-11-15 20:21:55,597 INFO L446 ceAbstractionStarter]: At program point L4-2(lines 3 8) the Hoare annotation is: true [2019-11-15 20:21:55,597 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-11-15 20:21:55,597 INFO L446 ceAbstractionStarter]: At program point L25(lines 10 28) the Hoare annotation is: true [2019-11-15 20:21:55,597 INFO L443 ceAbstractionStarter]: For program point L21(lines 21 24) no Hoare annotation was computed. [2019-11-15 20:21:55,597 INFO L443 ceAbstractionStarter]: For program point L21-2(lines 20 24) no Hoare annotation was computed. [2019-11-15 20:21:55,597 INFO L443 ceAbstractionStarter]: For program point L21-3(lines 10 28) no Hoare annotation was computed. [2019-11-15 20:21:55,597 INFO L443 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2019-11-15 20:21:55,605 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.11 08:21:55 BoogieIcfgContainer [2019-11-15 20:21:55,605 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-15 20:21:55,606 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-15 20:21:55,606 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-15 20:21:55,606 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-15 20:21:55,607 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 08:16:01" (3/4) ... [2019-11-15 20:21:55,611 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-11-15 20:21:55,623 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2019-11-15 20:21:55,624 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-11-15 20:21:55,684 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_b5515e52-b9dd-45db-b853-52b7190a6068/bin/uautomizer/witness.graphml [2019-11-15 20:21:55,690 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-15 20:21:55,693 INFO L168 Benchmark]: Toolchain (without parser) took 354774.22 ms. Allocated memory was 1.0 GB in the beginning and 1.5 GB in the end (delta: 497.0 MB). Free memory was 947.5 MB in the beginning and 990.7 MB in the end (delta: -43.2 MB). Peak memory consumption was 453.8 MB. Max. memory is 11.5 GB. [2019-11-15 20:21:55,693 INFO L168 Benchmark]: CDTParser took 0.36 ms. Allocated memory is still 1.0 GB. Free memory is still 967.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-15 20:21:55,694 INFO L168 Benchmark]: CACSL2BoogieTranslator took 434.98 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 138.9 MB). Free memory was 947.5 MB in the beginning and 1.1 GB in the end (delta: -182.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 11.5 GB. [2019-11-15 20:21:55,694 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.96 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. [2019-11-15 20:21:55,695 INFO L168 Benchmark]: Boogie Preprocessor took 33.59 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. [2019-11-15 20:21:55,695 INFO L168 Benchmark]: RCFGBuilder took 322.63 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: 24.0 MB). Peak memory consumption was 24.0 MB. Max. memory is 11.5 GB. [2019-11-15 20:21:55,696 INFO L168 Benchmark]: TraceAbstraction took 353855.29 ms. Allocated memory was 1.2 GB in the beginning and 1.5 GB in the end (delta: 358.1 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 96.5 MB). Peak memory consumption was 454.6 MB. Max. memory is 11.5 GB. [2019-11-15 20:21:55,696 INFO L168 Benchmark]: Witness Printer took 84.64 ms. Allocated memory is still 1.5 GB. Free memory was 1.0 GB in the beginning and 990.7 MB in the end (delta: 18.4 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. [2019-11-15 20:21:55,698 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36 ms. Allocated memory is still 1.0 GB. Free memory is still 967.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 434.98 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 138.9 MB). Free memory was 947.5 MB in the beginning and 1.1 GB in the end (delta: -182.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 37.96 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 33.59 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 322.63 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: 24.0 MB). Peak memory consumption was 24.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 353855.29 ms. Allocated memory was 1.2 GB in the beginning and 1.5 GB in the end (delta: 358.1 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 96.5 MB). Peak memory consumption was 454.6 MB. Max. memory is 11.5 GB. * Witness Printer took 84.64 ms. Allocated memory is still 1.5 GB. Free memory was 1.0 GB in the beginning and 990.7 MB in the end (delta: 18.4 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: 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: 10]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 3]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 10]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 16 locations, 1 error locations. Result: SAFE, OverallTime: 353.7s, OverallIterations: 19, TraceHistogramMax: 191, AutomataDifference: 128.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 318 SDtfs, 8884 SDslu, 7131 SDs, 0 SdLazy, 12246 SolverSat, 4897 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 10.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6950 GetRequests, 4399 SyntacticMatches, 0 SemanticMatches, 2551 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10270 ImplicationChecksByTransitivity, 219.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1191occurred in iteration=14, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 19 MinimizatonAttempts, 9959 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 6 NumberOfFragments, 3 HoareAnnotationTreeSize, 3 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.8s SsaConstructionTime, 6.2s SatisfiabilityAnalysisTime, 210.3s InterpolantComputationTime, 9180 NumberOfCodeBlocks, 9180 NumberOfCodeBlocksAsserted, 587 NumberOfCheckSat, 9145 ConstructedInterpolants, 0 QuantifiedInterpolants, 10450445 SizeOfPredicates, 46 NumberOfNonLiveVariables, 15544 ConjunctsInSsa, 2219 ConjunctsInUnsatCore, 35 InterpolantComputations, 4 PerfectInterpolantSequences, 108112/474054 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...