./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/sum_15x0-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cad46833 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_4255b901-11cf-4cb9-970c-7c50cd0c318c/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_4255b901-11cf-4cb9-970c-7c50cd0c318c/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_4255b901-11cf-4cb9-970c-7c50cd0c318c/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_4255b901-11cf-4cb9-970c-7c50cd0c318c/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/sum_15x0-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_4255b901-11cf-4cb9-970c-7c50cd0c318c/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_4255b901-11cf-4cb9-970c-7c50cd0c318c/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 31319b3dce926b7eddaa50d24c240f6870931f21 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.24-cad4683 [2019-11-15 23:59:30,458 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-15 23:59:30,460 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-15 23:59:30,470 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-15 23:59:30,470 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-15 23:59:30,471 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-15 23:59:30,473 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-15 23:59:30,475 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-15 23:59:30,477 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-15 23:59:30,477 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-15 23:59:30,478 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-15 23:59:30,479 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-15 23:59:30,480 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-15 23:59:30,481 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-15 23:59:30,481 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-15 23:59:30,482 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-15 23:59:30,483 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-15 23:59:30,484 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-15 23:59:30,486 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-15 23:59:30,488 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-15 23:59:30,490 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-15 23:59:30,491 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-15 23:59:30,492 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-15 23:59:30,492 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-15 23:59:30,496 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-15 23:59:30,496 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-15 23:59:30,496 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-15 23:59:30,497 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-15 23:59:30,497 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-15 23:59:30,498 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-15 23:59:30,499 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-15 23:59:30,499 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-15 23:59:30,500 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-15 23:59:30,501 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-15 23:59:30,503 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-15 23:59:30,503 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-15 23:59:30,504 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-15 23:59:30,504 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-15 23:59:30,505 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-15 23:59:30,506 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-15 23:59:30,506 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-15 23:59:30,507 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_4255b901-11cf-4cb9-970c-7c50cd0c318c/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-15 23:59:30,521 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-15 23:59:30,521 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-15 23:59:30,522 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-15 23:59:30,522 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-15 23:59:30,523 INFO L138 SettingsManager]: * Use SBE=true [2019-11-15 23:59:30,523 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-15 23:59:30,523 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-15 23:59:30,523 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-15 23:59:30,524 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-15 23:59:30,524 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-15 23:59:30,524 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-15 23:59:30,524 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-15 23:59:30,524 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-15 23:59:30,525 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-15 23:59:30,525 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-15 23:59:30,525 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-15 23:59:30,525 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-15 23:59:30,526 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-15 23:59:30,526 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-15 23:59:30,526 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-15 23:59:30,526 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-15 23:59:30,526 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-15 23:59:30,527 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-15 23:59:30,527 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-15 23:59:30,527 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-15 23:59:30,527 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-15 23:59:30,528 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-15 23:59:30,528 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-15 23:59:30,528 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_4255b901-11cf-4cb9-970c-7c50cd0c318c/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 31319b3dce926b7eddaa50d24c240f6870931f21 [2019-11-15 23:59:30,564 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-15 23:59:30,580 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-15 23:59:30,584 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-15 23:59:30,585 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-15 23:59:30,586 INFO L275 PluginConnector]: CDTParser initialized [2019-11-15 23:59:30,587 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_4255b901-11cf-4cb9-970c-7c50cd0c318c/bin/uautomizer/../../sv-benchmarks/c/recursive-simple/sum_15x0-2.c [2019-11-15 23:59:30,645 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_4255b901-11cf-4cb9-970c-7c50cd0c318c/bin/uautomizer/data/d3ad2edb2/96a3ed9bfb4b4f9f9a4c03f193561bc5/FLAG8e74d02ac [2019-11-15 23:59:30,974 INFO L306 CDTParser]: Found 1 translation units. [2019-11-15 23:59:30,976 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_4255b901-11cf-4cb9-970c-7c50cd0c318c/sv-benchmarks/c/recursive-simple/sum_15x0-2.c [2019-11-15 23:59:30,981 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_4255b901-11cf-4cb9-970c-7c50cd0c318c/bin/uautomizer/data/d3ad2edb2/96a3ed9bfb4b4f9f9a4c03f193561bc5/FLAG8e74d02ac [2019-11-15 23:59:31,363 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_4255b901-11cf-4cb9-970c-7c50cd0c318c/bin/uautomizer/data/d3ad2edb2/96a3ed9bfb4b4f9f9a4c03f193561bc5 [2019-11-15 23:59:31,365 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-15 23:59:31,367 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-15 23:59:31,368 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-15 23:59:31,368 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-15 23:59:31,373 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-15 23:59:31,374 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.11 11:59:31" (1/1) ... [2019-11-15 23:59:31,376 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@260e0eff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:59:31, skipping insertion in model container [2019-11-15 23:59:31,377 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.11 11:59:31" (1/1) ... [2019-11-15 23:59:31,383 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-15 23:59:31,404 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-15 23:59:31,555 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-15 23:59:31,558 INFO L188 MainTranslator]: Completed pre-run [2019-11-15 23:59:31,639 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-15 23:59:31,653 INFO L192 MainTranslator]: Completed translation [2019-11-15 23:59:31,653 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:59:31 WrapperNode [2019-11-15 23:59:31,654 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-15 23:59:31,654 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-15 23:59:31,655 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-15 23:59:31,655 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-15 23:59:31,664 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:59:31" (1/1) ... [2019-11-15 23:59:31,669 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:59:31" (1/1) ... [2019-11-15 23:59:31,687 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-15 23:59:31,689 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-15 23:59:31,689 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-15 23:59:31,689 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-15 23:59:31,698 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:59:31" (1/1) ... [2019-11-15 23:59:31,704 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:59:31" (1/1) ... [2019-11-15 23:59:31,705 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:59:31" (1/1) ... [2019-11-15 23:59:31,705 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:59:31" (1/1) ... [2019-11-15 23:59:31,707 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:59:31" (1/1) ... [2019-11-15 23:59:31,709 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:59:31" (1/1) ... [2019-11-15 23:59:31,710 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:59:31" (1/1) ... [2019-11-15 23:59:31,711 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-15 23:59:31,711 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-15 23:59:31,712 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-15 23:59:31,712 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-15 23:59:31,712 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:59:31" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4255b901-11cf-4cb9-970c-7c50cd0c318c/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 23:59:31,785 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-15 23:59:31,785 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-15 23:59:31,785 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2019-11-15 23:59:31,786 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2019-11-15 23:59:31,924 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-15 23:59:31,924 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-15 23:59:31,925 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 11:59:31 BoogieIcfgContainer [2019-11-15 23:59:31,926 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-15 23:59:31,926 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-15 23:59:31,927 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-15 23:59:31,929 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-15 23:59:31,929 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.11 11:59:31" (1/3) ... [2019-11-15 23:59:31,930 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cf46e44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.11 11:59:31, skipping insertion in model container [2019-11-15 23:59:31,930 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:59:31" (2/3) ... [2019-11-15 23:59:31,931 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cf46e44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.11 11:59:31, skipping insertion in model container [2019-11-15 23:59:31,931 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 11:59:31" (3/3) ... [2019-11-15 23:59:31,932 INFO L109 eAbstractionObserver]: Analyzing ICFG sum_15x0-2.c [2019-11-15 23:59:31,941 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-15 23:59:31,947 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-15 23:59:31,957 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-15 23:59:31,977 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-15 23:59:31,977 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-15 23:59:31,977 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-15 23:59:31,977 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-15 23:59:31,978 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-15 23:59:31,978 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-15 23:59:31,978 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-15 23:59:31,978 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-15 23:59:31,993 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2019-11-15 23:59:31,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-15 23:59:31,998 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:59:31,999 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:59:32,001 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:59:32,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:59:32,005 INFO L82 PathProgramCache]: Analyzing trace with hash 389977641, now seen corresponding path program 1 times [2019-11-15 23:59:32,013 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:59:32,014 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144995768] [2019-11-15 23:59:32,014 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:59:32,014 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:59:32,014 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:59:32,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:32,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:32,248 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 23:59:32,249 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144995768] [2019-11-15 23:59:32,250 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 23:59:32,250 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-15 23:59:32,250 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190427741] [2019-11-15 23:59:32,254 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-15 23:59:32,254 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:59:32,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-15 23:59:32,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-15 23:59:32,265 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 7 states. [2019-11-15 23:59:32,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:59:32,390 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2019-11-15 23:59:32,391 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-15 23:59:32,392 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 9 [2019-11-15 23:59:32,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:59:32,401 INFO L225 Difference]: With dead ends: 24 [2019-11-15 23:59:32,401 INFO L226 Difference]: Without dead ends: 14 [2019-11-15 23:59:32,404 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-11-15 23:59:32,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-11-15 23:59:32,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-11-15 23:59:32,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-15 23:59:32,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2019-11-15 23:59:32,442 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9 [2019-11-15 23:59:32,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:59:32,442 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2019-11-15 23:59:32,442 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-15 23:59:32,442 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2019-11-15 23:59:32,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-15 23:59:32,444 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:59:32,444 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:59:32,444 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:59:32,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:59:32,444 INFO L82 PathProgramCache]: Analyzing trace with hash -881029229, now seen corresponding path program 1 times [2019-11-15 23:59:32,445 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:59:32,445 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792545049] [2019-11-15 23:59:32,445 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:59:32,445 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:59:32,445 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:59:32,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:32,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:32,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:32,615 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-15 23:59:32,615 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792545049] [2019-11-15 23:59:32,615 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001624753] [2019-11-15 23:59:32,616 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4255b901-11cf-4cb9-970c-7c50cd0c318c/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 23:59:32,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:32,668 INFO L256 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-15 23:59:32,675 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:59:32,722 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-15 23:59:32,723 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:59:32,723 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 9 [2019-11-15 23:59:32,723 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829630431] [2019-11-15 23:59:32,725 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-15 23:59:32,725 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:59:32,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-15 23:59:32,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2019-11-15 23:59:32,726 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 9 states. [2019-11-15 23:59:32,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:59:32,814 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2019-11-15 23:59:32,814 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-15 23:59:32,815 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2019-11-15 23:59:32,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:59:32,815 INFO L225 Difference]: With dead ends: 21 [2019-11-15 23:59:32,816 INFO L226 Difference]: Without dead ends: 17 [2019-11-15 23:59:32,817 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2019-11-15 23:59:32,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-15 23:59:32,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-11-15 23:59:32,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-15 23:59:32,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2019-11-15 23:59:32,821 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2019-11-15 23:59:32,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:59:32,821 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2019-11-15 23:59:32,821 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-15 23:59:32,821 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2019-11-15 23:59:32,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-15 23:59:32,822 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:59:32,822 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:59:33,029 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:59:33,029 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:59:33,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:59:33,030 INFO L82 PathProgramCache]: Analyzing trace with hash -1824240471, now seen corresponding path program 2 times [2019-11-15 23:59:33,030 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:59:33,030 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498431664] [2019-11-15 23:59:33,030 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:59:33,031 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:59:33,031 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:59:33,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:33,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:33,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:33,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:33,241 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-15 23:59:33,242 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498431664] [2019-11-15 23:59:33,242 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74626830] [2019-11-15 23:59:33,242 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4255b901-11cf-4cb9-970c-7c50cd0c318c/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 23:59:33,280 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-15 23:59:33,281 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 23:59:33,282 INFO L256 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-15 23:59:33,284 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:59:33,316 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-15 23:59:33,317 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:59:33,317 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 10 [2019-11-15 23:59:33,317 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360200947] [2019-11-15 23:59:33,318 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-15 23:59:33,318 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:59:33,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-15 23:59:33,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2019-11-15 23:59:33,319 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 10 states. [2019-11-15 23:59:33,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:59:33,412 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2019-11-15 23:59:33,412 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-15 23:59:33,413 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 21 [2019-11-15 23:59:33,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:59:33,414 INFO L225 Difference]: With dead ends: 24 [2019-11-15 23:59:33,414 INFO L226 Difference]: Without dead ends: 20 [2019-11-15 23:59:33,415 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2019-11-15 23:59:33,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-15 23:59:33,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-11-15 23:59:33,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-15 23:59:33,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2019-11-15 23:59:33,420 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 21 [2019-11-15 23:59:33,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:59:33,420 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2019-11-15 23:59:33,420 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-15 23:59:33,421 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2019-11-15 23:59:33,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-15 23:59:33,425 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:59:33,425 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:59:33,629 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:59:33,629 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:59:33,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:59:33,630 INFO L82 PathProgramCache]: Analyzing trace with hash -28473709, now seen corresponding path program 3 times [2019-11-15 23:59:33,630 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:59:33,630 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043612238] [2019-11-15 23:59:33,630 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:59:33,630 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:59:33,630 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:59:33,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:33,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:33,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:33,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:33,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:33,813 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-15 23:59:33,814 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043612238] [2019-11-15 23:59:33,814 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90426224] [2019-11-15 23:59:33,814 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4255b901-11cf-4cb9-970c-7c50cd0c318c/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 23:59:33,862 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-15 23:59:33,862 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 23:59:33,863 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-15 23:59:33,865 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:59:33,891 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-15 23:59:33,891 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:59:33,892 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 11 [2019-11-15 23:59:33,892 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125128095] [2019-11-15 23:59:33,892 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-15 23:59:33,892 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:59:33,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-15 23:59:33,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2019-11-15 23:59:33,893 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 11 states. [2019-11-15 23:59:33,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:59:33,994 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2019-11-15 23:59:33,994 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-15 23:59:33,994 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 27 [2019-11-15 23:59:33,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:59:33,995 INFO L225 Difference]: With dead ends: 27 [2019-11-15 23:59:33,996 INFO L226 Difference]: Without dead ends: 23 [2019-11-15 23:59:33,996 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2019-11-15 23:59:33,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-15 23:59:34,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-11-15 23:59:34,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-15 23:59:34,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2019-11-15 23:59:34,003 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 27 [2019-11-15 23:59:34,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:59:34,003 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2019-11-15 23:59:34,003 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-15 23:59:34,003 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2019-11-15 23:59:34,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-15 23:59:34,005 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:59:34,005 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:59:34,206 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:59:34,206 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:59:34,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:59:34,206 INFO L82 PathProgramCache]: Analyzing trace with hash -2080894167, now seen corresponding path program 4 times [2019-11-15 23:59:34,207 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:59:34,207 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896033669] [2019-11-15 23:59:34,207 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:59:34,207 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:59:34,207 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:59:34,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:34,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:34,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:34,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:34,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:34,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:34,446 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-11-15 23:59:34,446 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896033669] [2019-11-15 23:59:34,446 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379128360] [2019-11-15 23:59:34,447 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4255b901-11cf-4cb9-970c-7c50cd0c318c/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 23:59:34,489 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-15 23:59:34,490 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 23:59:34,491 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-15 23:59:34,493 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:59:34,533 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-11-15 23:59:34,533 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:59:34,534 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 12 [2019-11-15 23:59:34,535 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106882475] [2019-11-15 23:59:34,536 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-15 23:59:34,536 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:59:34,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-15 23:59:34,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2019-11-15 23:59:34,537 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 12 states. [2019-11-15 23:59:34,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:59:34,658 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2019-11-15 23:59:34,659 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-15 23:59:34,659 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 33 [2019-11-15 23:59:34,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:59:34,660 INFO L225 Difference]: With dead ends: 30 [2019-11-15 23:59:34,660 INFO L226 Difference]: Without dead ends: 26 [2019-11-15 23:59:34,660 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2019-11-15 23:59:34,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-15 23:59:34,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-11-15 23:59:34,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-15 23:59:34,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2019-11-15 23:59:34,666 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 33 [2019-11-15 23:59:34,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:59:34,666 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2019-11-15 23:59:34,666 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-15 23:59:34,667 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2019-11-15 23:59:34,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-15 23:59:34,668 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:59:34,668 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:59:34,868 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:59:34,869 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:59:34,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:59:34,869 INFO L82 PathProgramCache]: Analyzing trace with hash -687460973, now seen corresponding path program 5 times [2019-11-15 23:59:34,869 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:59:34,870 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501728553] [2019-11-15 23:59:34,870 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:59:34,870 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:59:34,870 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:59:34,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:34,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:35,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:35,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:35,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:35,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:35,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:35,122 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-11-15 23:59:35,123 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501728553] [2019-11-15 23:59:35,123 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002029567] [2019-11-15 23:59:35,123 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4255b901-11cf-4cb9-970c-7c50cd0c318c/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 23:59:35,167 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-15 23:59:35,167 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 23:59:35,168 INFO L256 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-15 23:59:35,171 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:59:35,217 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-11-15 23:59:35,217 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:59:35,218 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 13 [2019-11-15 23:59:35,218 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227242930] [2019-11-15 23:59:35,222 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-15 23:59:35,222 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:59:35,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-15 23:59:35,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2019-11-15 23:59:35,223 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 13 states. [2019-11-15 23:59:35,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:59:35,374 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2019-11-15 23:59:35,375 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-15 23:59:35,375 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 39 [2019-11-15 23:59:35,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:59:35,376 INFO L225 Difference]: With dead ends: 33 [2019-11-15 23:59:35,376 INFO L226 Difference]: Without dead ends: 29 [2019-11-15 23:59:35,376 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2019-11-15 23:59:35,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-15 23:59:35,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-11-15 23:59:35,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-15 23:59:35,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2019-11-15 23:59:35,382 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 39 [2019-11-15 23:59:35,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:59:35,382 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2019-11-15 23:59:35,382 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-15 23:59:35,382 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2019-11-15 23:59:35,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-15 23:59:35,384 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:59:35,384 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:59:35,586 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:59:35,586 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:59:35,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:59:35,587 INFO L82 PathProgramCache]: Analyzing trace with hash 547744169, now seen corresponding path program 6 times [2019-11-15 23:59:35,587 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:59:35,587 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670655541] [2019-11-15 23:59:35,587 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:59:35,587 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:59:35,587 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:59:35,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:35,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:35,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:35,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:35,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:35,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:35,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:35,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:35,818 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-15 23:59:35,818 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670655541] [2019-11-15 23:59:35,819 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144682571] [2019-11-15 23:59:35,820 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4255b901-11cf-4cb9-970c-7c50cd0c318c/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 23:59:35,865 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-15 23:59:35,865 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 23:59:35,866 INFO L256 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-15 23:59:35,869 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:59:35,914 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-15 23:59:35,914 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:59:35,914 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 14 [2019-11-15 23:59:35,914 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756487286] [2019-11-15 23:59:35,915 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-15 23:59:35,915 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:59:35,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-15 23:59:35,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-11-15 23:59:35,916 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 14 states. [2019-11-15 23:59:36,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:59:36,064 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2019-11-15 23:59:36,064 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-15 23:59:36,064 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 45 [2019-11-15 23:59:36,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:59:36,065 INFO L225 Difference]: With dead ends: 36 [2019-11-15 23:59:36,065 INFO L226 Difference]: Without dead ends: 32 [2019-11-15 23:59:36,066 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2019-11-15 23:59:36,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-15 23:59:36,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-11-15 23:59:36,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-15 23:59:36,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2019-11-15 23:59:36,075 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 45 [2019-11-15 23:59:36,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:59:36,076 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2019-11-15 23:59:36,076 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-15 23:59:36,076 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2019-11-15 23:59:36,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-15 23:59:36,082 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:59:36,082 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:59:36,286 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:59:36,286 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:59:36,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:59:36,286 INFO L82 PathProgramCache]: Analyzing trace with hash -247823213, now seen corresponding path program 7 times [2019-11-15 23:59:36,286 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:59:36,286 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439800763] [2019-11-15 23:59:36,287 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:59:36,287 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:59:36,287 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:59:36,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:36,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:36,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:36,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:36,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:36,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:36,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:36,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:36,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:36,548 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-11-15 23:59:36,549 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439800763] [2019-11-15 23:59:36,550 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676106696] [2019-11-15 23:59:36,550 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4255b901-11cf-4cb9-970c-7c50cd0c318c/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 23:59:36,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:36,599 INFO L256 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-15 23:59:36,603 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:59:36,645 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-11-15 23:59:36,649 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:59:36,649 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 15 [2019-11-15 23:59:36,649 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943196131] [2019-11-15 23:59:36,650 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-15 23:59:36,650 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:59:36,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-15 23:59:36,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2019-11-15 23:59:36,651 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 15 states. [2019-11-15 23:59:36,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:59:36,834 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2019-11-15 23:59:36,835 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-15 23:59:36,835 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 51 [2019-11-15 23:59:36,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:59:36,836 INFO L225 Difference]: With dead ends: 39 [2019-11-15 23:59:36,836 INFO L226 Difference]: Without dead ends: 35 [2019-11-15 23:59:36,837 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=152, Invalid=354, Unknown=0, NotChecked=0, Total=506 [2019-11-15 23:59:36,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-15 23:59:36,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2019-11-15 23:59:36,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-15 23:59:36,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2019-11-15 23:59:36,842 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 51 [2019-11-15 23:59:36,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:59:36,843 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2019-11-15 23:59:36,843 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-15 23:59:36,843 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2019-11-15 23:59:36,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-11-15 23:59:36,844 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:59:36,844 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:59:37,048 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:59:37,049 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:59:37,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:59:37,050 INFO L82 PathProgramCache]: Analyzing trace with hash -1818636247, now seen corresponding path program 8 times [2019-11-15 23:59:37,050 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:59:37,050 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446316735] [2019-11-15 23:59:37,050 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:59:37,051 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:59:37,051 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:59:37,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:37,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:37,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:37,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:37,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:37,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:37,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:37,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:37,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:37,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:37,334 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-15 23:59:37,335 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446316735] [2019-11-15 23:59:37,335 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601345211] [2019-11-15 23:59:37,335 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4255b901-11cf-4cb9-970c-7c50cd0c318c/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 23:59:37,397 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-15 23:59:37,397 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 23:59:37,398 INFO L256 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-15 23:59:37,404 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:59:37,454 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-15 23:59:37,454 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:59:37,454 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 16 [2019-11-15 23:59:37,455 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643813158] [2019-11-15 23:59:37,459 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-15 23:59:37,459 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:59:37,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-15 23:59:37,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2019-11-15 23:59:37,460 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 16 states. [2019-11-15 23:59:37,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:59:37,620 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2019-11-15 23:59:37,622 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-15 23:59:37,622 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 57 [2019-11-15 23:59:37,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:59:37,623 INFO L225 Difference]: With dead ends: 42 [2019-11-15 23:59:37,623 INFO L226 Difference]: Without dead ends: 38 [2019-11-15 23:59:37,624 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=183, Invalid=417, Unknown=0, NotChecked=0, Total=600 [2019-11-15 23:59:37,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-11-15 23:59:37,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-11-15 23:59:37,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-11-15 23:59:37,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2019-11-15 23:59:37,629 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 57 [2019-11-15 23:59:37,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:59:37,629 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2019-11-15 23:59:37,629 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-15 23:59:37,629 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2019-11-15 23:59:37,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-11-15 23:59:37,629 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:59:37,630 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:59:37,832 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:59:37,833 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:59:37,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:59:37,833 INFO L82 PathProgramCache]: Analyzing trace with hash -2055304301, now seen corresponding path program 9 times [2019-11-15 23:59:37,833 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:59:37,833 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261103239] [2019-11-15 23:59:37,833 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:59:37,833 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:59:37,833 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:59:37,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:37,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:37,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:37,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:37,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:38,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:38,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:38,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:38,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:38,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:38,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:38,166 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2019-11-15 23:59:38,166 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261103239] [2019-11-15 23:59:38,166 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101792602] [2019-11-15 23:59:38,167 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4255b901-11cf-4cb9-970c-7c50cd0c318c/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 23:59:38,232 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-11-15 23:59:38,232 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 23:59:38,233 INFO L256 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-15 23:59:38,236 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:59:38,272 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2019-11-15 23:59:38,272 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:59:38,272 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 17 [2019-11-15 23:59:38,273 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833712682] [2019-11-15 23:59:38,273 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-15 23:59:38,273 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:59:38,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-15 23:59:38,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2019-11-15 23:59:38,274 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 17 states. [2019-11-15 23:59:38,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:59:38,434 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2019-11-15 23:59:38,434 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-15 23:59:38,434 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 63 [2019-11-15 23:59:38,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:59:38,436 INFO L225 Difference]: With dead ends: 45 [2019-11-15 23:59:38,436 INFO L226 Difference]: Without dead ends: 41 [2019-11-15 23:59:38,437 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=217, Invalid=485, Unknown=0, NotChecked=0, Total=702 [2019-11-15 23:59:38,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-15 23:59:38,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2019-11-15 23:59:38,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-11-15 23:59:38,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2019-11-15 23:59:38,442 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 63 [2019-11-15 23:59:38,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:59:38,442 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2019-11-15 23:59:38,443 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-15 23:59:38,443 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2019-11-15 23:59:38,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-11-15 23:59:38,444 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:59:38,444 INFO L380 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:59:38,644 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:59:38,645 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:59:38,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:59:38,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1172322647, now seen corresponding path program 10 times [2019-11-15 23:59:38,645 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:59:38,645 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123613010] [2019-11-15 23:59:38,645 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:59:38,645 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:59:38,645 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:59:38,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:38,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:38,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:38,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:38,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:38,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:38,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:38,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:38,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:38,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:38,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:38,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:38,972 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2019-11-15 23:59:38,972 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123613010] [2019-11-15 23:59:38,972 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254086200] [2019-11-15 23:59:38,972 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4255b901-11cf-4cb9-970c-7c50cd0c318c/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 23:59:39,031 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-15 23:59:39,032 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 23:59:39,033 INFO L256 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-15 23:59:39,036 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:59:39,082 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2019-11-15 23:59:39,082 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:59:39,082 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 18 [2019-11-15 23:59:39,083 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665110762] [2019-11-15 23:59:39,084 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-15 23:59:39,084 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:59:39,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-15 23:59:39,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2019-11-15 23:59:39,085 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 18 states. [2019-11-15 23:59:39,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:59:39,269 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2019-11-15 23:59:39,270 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-15 23:59:39,270 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 69 [2019-11-15 23:59:39,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:59:39,271 INFO L225 Difference]: With dead ends: 48 [2019-11-15 23:59:39,271 INFO L226 Difference]: Without dead ends: 44 [2019-11-15 23:59:39,272 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=254, Invalid=558, Unknown=0, NotChecked=0, Total=812 [2019-11-15 23:59:39,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-11-15 23:59:39,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-11-15 23:59:39,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-15 23:59:39,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2019-11-15 23:59:39,277 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 69 [2019-11-15 23:59:39,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:59:39,277 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2019-11-15 23:59:39,278 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-15 23:59:39,281 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2019-11-15 23:59:39,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-11-15 23:59:39,297 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:59:39,302 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:59:39,502 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:59:39,503 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:59:39,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:59:39,503 INFO L82 PathProgramCache]: Analyzing trace with hash -1452916077, now seen corresponding path program 11 times [2019-11-15 23:59:39,503 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:59:39,503 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246994817] [2019-11-15 23:59:39,503 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:59:39,503 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:59:39,504 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:59:39,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:39,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:39,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:39,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:39,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:39,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:39,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:39,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:39,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:39,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:39,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:39,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:39,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:39,895 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-11-15 23:59:39,896 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246994817] [2019-11-15 23:59:39,896 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490633295] [2019-11-15 23:59:39,896 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4255b901-11cf-4cb9-970c-7c50cd0c318c/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 23:59:39,977 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-11-15 23:59:39,978 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 23:59:39,979 INFO L256 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-15 23:59:39,982 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:59:40,024 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-11-15 23:59:40,024 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:59:40,024 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 19 [2019-11-15 23:59:40,024 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523042106] [2019-11-15 23:59:40,025 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-15 23:59:40,025 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:59:40,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-15 23:59:40,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2019-11-15 23:59:40,026 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 19 states. [2019-11-15 23:59:40,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:59:40,231 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2019-11-15 23:59:40,232 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-15 23:59:40,232 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 75 [2019-11-15 23:59:40,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:59:40,233 INFO L225 Difference]: With dead ends: 51 [2019-11-15 23:59:40,233 INFO L226 Difference]: Without dead ends: 47 [2019-11-15 23:59:40,234 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=294, Invalid=636, Unknown=0, NotChecked=0, Total=930 [2019-11-15 23:59:40,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-11-15 23:59:40,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2019-11-15 23:59:40,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-11-15 23:59:40,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2019-11-15 23:59:40,240 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 75 [2019-11-15 23:59:40,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:59:40,240 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2019-11-15 23:59:40,240 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-15 23:59:40,241 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2019-11-15 23:59:40,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-11-15 23:59:40,242 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:59:40,242 INFO L380 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:59:40,442 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:59:40,443 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:59:40,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:59:40,443 INFO L82 PathProgramCache]: Analyzing trace with hash -461124311, now seen corresponding path program 12 times [2019-11-15 23:59:40,443 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:59:40,443 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393678017] [2019-11-15 23:59:40,443 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:59:40,444 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:59:40,444 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:59:40,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:40,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:40,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:40,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:40,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:40,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:40,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:40,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:40,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:40,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:40,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:40,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:40,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:40,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:40,883 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2019-11-15 23:59:40,884 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393678017] [2019-11-15 23:59:40,884 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996760362] [2019-11-15 23:59:40,884 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4255b901-11cf-4cb9-970c-7c50cd0c318c/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 23:59:40,970 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-11-15 23:59:40,971 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 23:59:40,972 INFO L256 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 28 conjunts are in the unsatisfiable core [2019-11-15 23:59:40,974 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:59:41,013 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2019-11-15 23:59:41,013 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:59:41,013 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 20 [2019-11-15 23:59:41,013 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522313220] [2019-11-15 23:59:41,014 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-15 23:59:41,014 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:59:41,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-15 23:59:41,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=264, Unknown=0, NotChecked=0, Total=380 [2019-11-15 23:59:41,015 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 20 states. [2019-11-15 23:59:41,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:59:41,271 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2019-11-15 23:59:41,271 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-15 23:59:41,271 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 81 [2019-11-15 23:59:41,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:59:41,272 INFO L225 Difference]: With dead ends: 54 [2019-11-15 23:59:41,272 INFO L226 Difference]: Without dead ends: 50 [2019-11-15 23:59:41,273 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=337, Invalid=719, Unknown=0, NotChecked=0, Total=1056 [2019-11-15 23:59:41,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-11-15 23:59:41,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2019-11-15 23:59:41,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-15 23:59:41,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2019-11-15 23:59:41,280 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 81 [2019-11-15 23:59:41,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:59:41,280 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2019-11-15 23:59:41,280 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-15 23:59:41,280 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2019-11-15 23:59:41,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-11-15 23:59:41,281 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:59:41,282 INFO L380 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:59:41,491 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:59:41,491 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:59:41,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:59:41,491 INFO L82 PathProgramCache]: Analyzing trace with hash -1887065709, now seen corresponding path program 13 times [2019-11-15 23:59:41,491 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:59:41,491 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795406575] [2019-11-15 23:59:41,491 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:59:41,491 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:59:41,492 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:59:41,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:41,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:41,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:41,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:41,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:41,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:41,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:41,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:41,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:41,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:41,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:41,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:41,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:41,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:41,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:41,956 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2019-11-15 23:59:41,957 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795406575] [2019-11-15 23:59:41,957 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136743167] [2019-11-15 23:59:41,957 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4255b901-11cf-4cb9-970c-7c50cd0c318c/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 23:59:42,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:42,019 INFO L256 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 30 conjunts are in the unsatisfiable core [2019-11-15 23:59:42,021 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:59:42,065 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2019-11-15 23:59:42,066 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:59:42,066 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 21 [2019-11-15 23:59:42,066 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511919693] [2019-11-15 23:59:42,068 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-15 23:59:42,068 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:59:42,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-15 23:59:42,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=289, Unknown=0, NotChecked=0, Total=420 [2019-11-15 23:59:42,069 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 21 states. [2019-11-15 23:59:42,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:59:42,311 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2019-11-15 23:59:42,312 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-15 23:59:42,312 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 87 [2019-11-15 23:59:42,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:59:42,313 INFO L225 Difference]: With dead ends: 57 [2019-11-15 23:59:42,313 INFO L226 Difference]: Without dead ends: 53 [2019-11-15 23:59:42,314 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=383, Invalid=807, Unknown=0, NotChecked=0, Total=1190 [2019-11-15 23:59:42,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-11-15 23:59:42,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2019-11-15 23:59:42,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-11-15 23:59:42,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2019-11-15 23:59:42,322 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 87 [2019-11-15 23:59:42,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:59:42,323 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2019-11-15 23:59:42,323 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-15 23:59:42,323 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2019-11-15 23:59:42,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-11-15 23:59:42,325 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:59:42,325 INFO L380 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:59:42,526 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:59:42,526 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:59:42,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:59:42,526 INFO L82 PathProgramCache]: Analyzing trace with hash -1777212503, now seen corresponding path program 14 times [2019-11-15 23:59:42,526 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:59:42,526 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228941659] [2019-11-15 23:59:42,526 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:59:42,526 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:59:42,527 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:59:42,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:42,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:42,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:42,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:42,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:42,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:42,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:42,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:42,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:42,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:42,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:42,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:42,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:42,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:43,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:43,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:59:43,098 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2019-11-15 23:59:43,098 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228941659] [2019-11-15 23:59:43,099 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312998914] [2019-11-15 23:59:43,099 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4255b901-11cf-4cb9-970c-7c50cd0c318c/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 23:59:43,174 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-15 23:59:43,174 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 23:59:43,176 INFO L256 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 32 conjunts are in the unsatisfiable core [2019-11-15 23:59:43,178 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:59:43,228 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2019-11-15 23:59:43,228 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:59:43,228 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 22 [2019-11-15 23:59:43,228 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945482280] [2019-11-15 23:59:43,229 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-15 23:59:43,229 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:59:43,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-15 23:59:43,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=315, Unknown=0, NotChecked=0, Total=462 [2019-11-15 23:59:43,230 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 22 states. [2019-11-15 23:59:43,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:59:43,502 INFO L93 Difference]: Finished difference Result 60 states and 61 transitions. [2019-11-15 23:59:43,502 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-15 23:59:43,503 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 93 [2019-11-15 23:59:43,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:59:43,503 INFO L225 Difference]: With dead ends: 60 [2019-11-15 23:59:43,504 INFO L226 Difference]: Without dead ends: 56 [2019-11-15 23:59:43,505 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=432, Invalid=900, Unknown=0, NotChecked=0, Total=1332 [2019-11-15 23:59:43,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-11-15 23:59:43,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2019-11-15 23:59:43,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-11-15 23:59:43,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2019-11-15 23:59:43,509 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 93 [2019-11-15 23:59:43,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:59:43,510 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2019-11-15 23:59:43,510 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-15 23:59:43,510 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2019-11-15 23:59:43,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-11-15 23:59:43,511 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:59:43,511 INFO L380 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:59:43,725 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:59:43,725 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:59:43,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:59:43,726 INFO L82 PathProgramCache]: Analyzing trace with hash -948911981, now seen corresponding path program 15 times [2019-11-15 23:59:43,726 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:59:43,726 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966669947] [2019-11-15 23:59:43,726 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:59:43,726 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:59:43,726 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:59:43,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 23:59:43,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 23:59:43,787 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-15 23:59:43,787 INFO L445 BasicCegarLoop]: Counterexample might be feasible [2019-11-15 23:59:43,856 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.11 11:59:43 BoogieIcfgContainer [2019-11-15 23:59:43,857 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-15 23:59:43,857 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-15 23:59:43,857 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-15 23:59:43,857 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-15 23:59:43,858 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 11:59:31" (3/4) ... [2019-11-15 23:59:43,860 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-15 23:59:43,931 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_4255b901-11cf-4cb9-970c-7c50cd0c318c/bin/uautomizer/witness.graphml [2019-11-15 23:59:43,931 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-15 23:59:43,933 INFO L168 Benchmark]: Toolchain (without parser) took 12566.22 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 210.2 MB). Free memory was 950.1 MB in the beginning and 1.0 GB in the end (delta: -58.8 MB). Peak memory consumption was 151.4 MB. Max. memory is 11.5 GB. [2019-11-15 23:59:43,934 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-15 23:59:43,934 INFO L168 Benchmark]: CACSL2BoogieTranslator took 286.25 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 121.6 MB). Free memory was 950.1 MB in the beginning and 1.1 GB in the end (delta: -167.7 MB). Peak memory consumption was 23.1 MB. Max. memory is 11.5 GB. [2019-11-15 23:59:43,935 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.08 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 23:59:43,935 INFO L168 Benchmark]: Boogie Preprocessor took 22.40 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-15 23:59:43,936 INFO L168 Benchmark]: RCFGBuilder took 214.28 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: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 11.5 GB. [2019-11-15 23:59:43,936 INFO L168 Benchmark]: TraceAbstraction took 11930.33 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 88.6 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 79.5 MB). Peak memory consumption was 168.1 MB. Max. memory is 11.5 GB. [2019-11-15 23:59:43,937 INFO L168 Benchmark]: Witness Printer took 74.43 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. [2019-11-15 23:59:43,942 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 286.25 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 121.6 MB). Free memory was 950.1 MB in the beginning and 1.1 GB in the end (delta: -167.7 MB). Peak memory consumption was 23.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 34.08 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 22.40 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 214.28 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: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 11930.33 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 88.6 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 79.5 MB). Peak memory consumption was 168.1 MB. Max. memory is 11.5 GB. * Witness Printer took 74.43 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 16]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int a = 15; [L13] int b = 0; [L14] CALL, EXPR sum(a, b) VAL [\old(m)=0, \old(n)=15] [L4] COND FALSE !(n <= 0) VAL [\old(m)=0, \old(n)=15, m=0, n=15] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=1, \old(n)=14] [L4] COND FALSE !(n <= 0) VAL [\old(m)=1, \old(n)=14, m=1, n=14] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=2, \old(n)=13] [L4] COND FALSE !(n <= 0) VAL [\old(m)=2, \old(n)=13, m=2, n=13] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=3, \old(n)=12] [L4] COND FALSE !(n <= 0) VAL [\old(m)=3, \old(n)=12, m=3, n=12] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=4, \old(n)=11] [L4] COND FALSE !(n <= 0) VAL [\old(m)=4, \old(n)=11, m=4, n=11] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=5, \old(n)=10] [L4] COND FALSE !(n <= 0) VAL [\old(m)=5, \old(n)=10, m=5, n=10] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=6, \old(n)=9] [L4] COND FALSE !(n <= 0) VAL [\old(m)=6, \old(n)=9, m=6, n=9] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=7, \old(n)=8] [L4] COND FALSE !(n <= 0) VAL [\old(m)=7, \old(n)=8, m=7, n=8] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=8, \old(n)=7] [L4] COND FALSE !(n <= 0) VAL [\old(m)=8, \old(n)=7, m=8, n=7] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=9, \old(n)=6] [L4] COND FALSE !(n <= 0) VAL [\old(m)=9, \old(n)=6, m=9, n=6] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=10, \old(n)=5] [L4] COND FALSE !(n <= 0) VAL [\old(m)=10, \old(n)=5, m=10, n=5] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=11, \old(n)=4] [L4] COND FALSE !(n <= 0) VAL [\old(m)=11, \old(n)=4, m=11, n=4] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=12, \old(n)=3] [L4] COND FALSE !(n <= 0) VAL [\old(m)=12, \old(n)=3, m=12, n=3] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=13, \old(n)=2] [L4] COND FALSE !(n <= 0) VAL [\old(m)=13, \old(n)=2, m=13, n=2] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=14, \old(n)=1] [L4] COND FALSE !(n <= 0) VAL [\old(m)=14, \old(n)=1, m=14, n=1] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=15, \old(n)=0] [L4] COND TRUE n <= 0 [L5] return m + n; VAL [\old(m)=15, \old(n)=0, \result=15, m=15, n=0] [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=14, \old(n)=1, m=14, n=1, sum(n - 1, m + 1)=15] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=13, \old(n)=2, m=13, n=2, sum(n - 1, m + 1)=15] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=12, \old(n)=3, m=12, n=3, sum(n - 1, m + 1)=15] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=11, \old(n)=4, m=11, n=4, sum(n - 1, m + 1)=15] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=10, \old(n)=5, m=10, n=5, sum(n - 1, m + 1)=15] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=9, \old(n)=6, m=9, n=6, sum(n - 1, m + 1)=15] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=8, \old(n)=7, m=8, n=7, sum(n - 1, m + 1)=15] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=7, \old(n)=8, m=7, n=8, sum(n - 1, m + 1)=15] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=6, \old(n)=9, m=6, n=9, sum(n - 1, m + 1)=15] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=5, \old(n)=10, m=5, n=10, sum(n - 1, m + 1)=15] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=4, \old(n)=11, m=4, n=11, sum(n - 1, m + 1)=15] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=3, \old(n)=12, m=3, n=12, sum(n - 1, m + 1)=15] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=2, \old(n)=13, m=2, n=13, sum(n - 1, m + 1)=15] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=1, \old(n)=14, m=1, n=14, sum(n - 1, m + 1)=15] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=0, \old(n)=15, m=0, n=15, sum(n - 1, m + 1)=15] [L7] return sum(n - 1, m + 1); [L14] RET, EXPR sum(a, b) [L14] int result = sum(a, b); [L15] COND TRUE result == a + b [L16] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 15 locations, 1 error locations. Result: UNSAFE, OverallTime: 11.8s, OverallIterations: 16, TraceHistogramMax: 16, AutomataDifference: 2.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 122 SDtfs, 447 SDslu, 647 SDs, 0 SdLazy, 830 SolverSat, 96 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1282 GetRequests, 968 SyntacticMatches, 0 SemanticMatches, 314 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1120 ImplicationChecksByTransitivity, 3.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=56occurred in iteration=15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 15 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 4.8s InterpolantComputationTime, 1620 NumberOfCodeBlocks, 1620 NumberOfCodeBlocksAsserted, 81 NumberOfCheckSat, 1492 ConstructedInterpolants, 0 QuantifiedInterpolants, 254632 SizeOfPredicates, 133 NumberOfNonLiveVariables, 2296 ConjunctsInSsa, 266 ConjunctsInUnsatCore, 29 InterpolantComputations, 1 PerfectInterpolantSequences, 3150/6300 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...