./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/id_i20_o20-2.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/working_dir_138ea920-1cf9-406f-806c-a20efe2af162/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_138ea920-1cf9-406f-806c-a20efe2af162/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_138ea920-1cf9-406f-806c-a20efe2af162/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_138ea920-1cf9-406f-806c-a20efe2af162/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/id_i20_o20-2.c -s /tmp/vcloud-vcloud-master/worker/working_dir_138ea920-1cf9-406f-806c-a20efe2af162/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_138ea920-1cf9-406f-806c-a20efe2af162/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 7d05936c4bb1bb97a4b24ebc11d02c0e844c743b ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 [2019-10-22 08:55:33,417 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 08:55:33,419 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 08:55:33,429 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 08:55:33,430 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 08:55:33,431 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 08:55:33,432 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 08:55:33,434 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 08:55:33,437 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 08:55:33,440 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 08:55:33,442 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 08:55:33,443 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 08:55:33,448 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 08:55:33,451 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 08:55:33,452 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 08:55:33,452 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 08:55:33,453 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 08:55:33,454 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 08:55:33,455 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 08:55:33,456 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 08:55:33,457 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 08:55:33,461 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 08:55:33,463 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 08:55:33,465 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 08:55:33,466 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 08:55:33,466 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 08:55:33,467 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 08:55:33,467 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 08:55:33,467 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 08:55:33,468 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 08:55:33,468 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 08:55:33,469 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 08:55:33,472 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 08:55:33,473 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 08:55:33,474 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 08:55:33,475 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 08:55:33,476 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 08:55:33,476 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 08:55:33,477 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 08:55:33,477 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 08:55:33,478 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 08:55:33,478 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_138ea920-1cf9-406f-806c-a20efe2af162/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-22 08:55:33,499 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 08:55:33,500 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 08:55:33,502 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-22 08:55:33,502 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-22 08:55:33,502 INFO L138 SettingsManager]: * Use SBE=true [2019-10-22 08:55:33,502 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 08:55:33,503 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-22 08:55:33,503 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-22 08:55:33,503 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-22 08:55:33,503 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 08:55:33,503 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-22 08:55:33,503 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 08:55:33,504 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-22 08:55:33,504 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-22 08:55:33,504 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-22 08:55:33,504 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-22 08:55:33,504 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-22 08:55:33,504 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 08:55:33,505 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 08:55:33,505 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 08:55:33,505 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-22 08:55:33,506 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 08:55:33,507 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 08:55:33,507 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 08:55:33,507 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-22 08:55:33,507 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-22 08:55:33,508 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-22 08:55:33,508 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-22 08:55:33,508 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/working_dir_138ea920-1cf9-406f-806c-a20efe2af162/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 -> 7d05936c4bb1bb97a4b24ebc11d02c0e844c743b [2019-10-22 08:55:33,546 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 08:55:33,557 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 08:55:33,561 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 08:55:33,562 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 08:55:33,562 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 08:55:33,563 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_138ea920-1cf9-406f-806c-a20efe2af162/bin/uautomizer/../../sv-benchmarks/c/recursive-simple/id_i20_o20-2.c [2019-10-22 08:55:33,613 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_138ea920-1cf9-406f-806c-a20efe2af162/bin/uautomizer/data/826cde0e3/838b970956604bd392a157c1abfb7307/FLAG458e6a4a7 [2019-10-22 08:55:34,005 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 08:55:34,006 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_138ea920-1cf9-406f-806c-a20efe2af162/sv-benchmarks/c/recursive-simple/id_i20_o20-2.c [2019-10-22 08:55:34,010 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_138ea920-1cf9-406f-806c-a20efe2af162/bin/uautomizer/data/826cde0e3/838b970956604bd392a157c1abfb7307/FLAG458e6a4a7 [2019-10-22 08:55:34,020 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_138ea920-1cf9-406f-806c-a20efe2af162/bin/uautomizer/data/826cde0e3/838b970956604bd392a157c1abfb7307 [2019-10-22 08:55:34,022 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 08:55:34,023 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 08:55:34,024 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 08:55:34,024 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 08:55:34,030 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 08:55:34,030 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 08:55:34" (1/1) ... [2019-10-22 08:55:34,032 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3cd3bf3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:55:34, skipping insertion in model container [2019-10-22 08:55:34,032 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 08:55:34" (1/1) ... [2019-10-22 08:55:34,038 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 08:55:34,050 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 08:55:34,164 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 08:55:34,168 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 08:55:34,237 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 08:55:34,250 INFO L192 MainTranslator]: Completed translation [2019-10-22 08:55:34,251 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:55:34 WrapperNode [2019-10-22 08:55:34,251 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 08:55:34,251 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 08:55:34,252 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 08:55:34,252 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 08:55:34,260 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:55:34" (1/1) ... [2019-10-22 08:55:34,265 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:55:34" (1/1) ... [2019-10-22 08:55:34,283 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 08:55:34,283 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 08:55:34,283 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 08:55:34,283 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 08:55:34,290 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:55:34" (1/1) ... [2019-10-22 08:55:34,290 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:55:34" (1/1) ... [2019-10-22 08:55:34,290 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:55:34" (1/1) ... [2019-10-22 08:55:34,290 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:55:34" (1/1) ... [2019-10-22 08:55:34,292 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:55:34" (1/1) ... [2019-10-22 08:55:34,294 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:55:34" (1/1) ... [2019-10-22 08:55:34,294 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:55:34" (1/1) ... [2019-10-22 08:55:34,295 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 08:55:34,296 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 08:55:34,296 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 08:55:34,296 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 08:55:34,297 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:55:34" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_138ea920-1cf9-406f-806c-a20efe2af162/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 [2019-10-22 08:55:34,368 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 08:55:34,369 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 08:55:34,369 INFO L130 BoogieDeclarations]: Found specification of procedure id [2019-10-22 08:55:34,369 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2019-10-22 08:55:34,518 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 08:55:34,518 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-10-22 08:55:34,519 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 08:55:34 BoogieIcfgContainer [2019-10-22 08:55:34,519 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 08:55:34,520 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-22 08:55:34,520 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-22 08:55:34,527 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-22 08:55:34,527 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 08:55:34" (1/3) ... [2019-10-22 08:55:34,528 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45797d80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 08:55:34, skipping insertion in model container [2019-10-22 08:55:34,528 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:55:34" (2/3) ... [2019-10-22 08:55:34,528 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45797d80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 08:55:34, skipping insertion in model container [2019-10-22 08:55:34,528 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 08:55:34" (3/3) ... [2019-10-22 08:55:34,530 INFO L109 eAbstractionObserver]: Analyzing ICFG id_i20_o20-2.c [2019-10-22 08:55:34,541 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-22 08:55:34,547 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-22 08:55:34,559 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-22 08:55:34,582 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-22 08:55:34,583 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-22 08:55:34,583 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-22 08:55:34,583 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 08:55:34,584 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 08:55:34,584 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-22 08:55:34,584 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 08:55:34,584 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-22 08:55:34,599 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2019-10-22 08:55:34,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-10-22 08:55:34,605 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:55:34,605 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:55:34,607 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:55:34,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:55:34,612 INFO L82 PathProgramCache]: Analyzing trace with hash 389977641, now seen corresponding path program 1 times [2019-10-22 08:55:34,620 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:55:34,620 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897921551] [2019-10-22 08:55:34,621 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:55:34,621 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:55:34,621 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:55:34,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:34,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:34,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:55:34,794 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897921551] [2019-10-22 08:55:34,795 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:55:34,795 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-22 08:55:34,796 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102757624] [2019-10-22 08:55:34,800 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-22 08:55:34,800 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:55:34,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-22 08:55:34,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-22 08:55:34,815 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 7 states. [2019-10-22 08:55:34,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:55:34,922 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2019-10-22 08:55:34,923 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-22 08:55:34,924 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 9 [2019-10-22 08:55:34,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:55:34,932 INFO L225 Difference]: With dead ends: 24 [2019-10-22 08:55:34,932 INFO L226 Difference]: Without dead ends: 14 [2019-10-22 08:55:34,935 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-10-22 08:55:34,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-10-22 08:55:34,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-10-22 08:55:34,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-10-22 08:55:34,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2019-10-22 08:55:34,968 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9 [2019-10-22 08:55:34,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:55:34,969 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2019-10-22 08:55:34,969 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-22 08:55:34,969 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2019-10-22 08:55:34,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-22 08:55:34,970 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:55:34,970 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:55:34,971 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:55:34,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:55:34,971 INFO L82 PathProgramCache]: Analyzing trace with hash -881029229, now seen corresponding path program 1 times [2019-10-22 08:55:34,972 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:55:34,972 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217427542] [2019-10-22 08:55:34,972 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:55:34,972 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:55:34,972 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:55:34,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:35,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:35,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:35,103 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-22 08:55:35,103 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217427542] [2019-10-22 08:55:35,104 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642921353] [2019-10-22 08:55:35,104 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_138ea920-1cf9-406f-806c-a20efe2af162/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 [2019-10-22 08:55:35,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:35,134 INFO L256 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-22 08:55:35,138 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:55:35,211 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-22 08:55:35,212 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:55:35,216 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 10 [2019-10-22 08:55:35,216 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496754381] [2019-10-22 08:55:35,218 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-22 08:55:35,218 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:55:35,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-22 08:55:35,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2019-10-22 08:55:35,219 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 10 states. [2019-10-22 08:55:35,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:55:35,326 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2019-10-22 08:55:35,327 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-22 08:55:35,328 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 15 [2019-10-22 08:55:35,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:55:35,328 INFO L225 Difference]: With dead ends: 21 [2019-10-22 08:55:35,328 INFO L226 Difference]: Without dead ends: 17 [2019-10-22 08:55:35,330 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2019-10-22 08:55:35,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-10-22 08:55:35,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-10-22 08:55:35,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-10-22 08:55:35,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2019-10-22 08:55:35,334 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2019-10-22 08:55:35,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:55:35,337 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2019-10-22 08:55:35,337 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-22 08:55:35,337 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2019-10-22 08:55:35,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-22 08:55:35,338 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:55:35,338 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:55:35,538 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:55:35,539 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:55:35,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:55:35,540 INFO L82 PathProgramCache]: Analyzing trace with hash -1824240471, now seen corresponding path program 2 times [2019-10-22 08:55:35,541 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:55:35,542 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210178880] [2019-10-22 08:55:35,542 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:55:35,543 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:55:35,543 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:55:35,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:35,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:35,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:35,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:35,702 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-22 08:55:35,702 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210178880] [2019-10-22 08:55:35,703 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308817287] [2019-10-22 08:55:35,703 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_138ea920-1cf9-406f-806c-a20efe2af162/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 [2019-10-22 08:55:35,741 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 08:55:35,741 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 08:55:35,741 INFO L256 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-22 08:55:35,742 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:55:35,782 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-22 08:55:35,782 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:55:35,782 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 11 [2019-10-22 08:55:35,782 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813737935] [2019-10-22 08:55:35,783 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-22 08:55:35,783 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:55:35,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-22 08:55:35,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2019-10-22 08:55:35,784 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 11 states. [2019-10-22 08:55:35,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:55:35,850 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2019-10-22 08:55:35,851 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-22 08:55:35,851 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 21 [2019-10-22 08:55:35,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:55:35,852 INFO L225 Difference]: With dead ends: 24 [2019-10-22 08:55:35,852 INFO L226 Difference]: Without dead ends: 20 [2019-10-22 08:55:35,852 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2019-10-22 08:55:35,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-10-22 08:55:35,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-10-22 08:55:35,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-10-22 08:55:35,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2019-10-22 08:55:35,857 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 21 [2019-10-22 08:55:35,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:55:35,857 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2019-10-22 08:55:35,857 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-22 08:55:35,857 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2019-10-22 08:55:35,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-10-22 08:55:35,858 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:55:35,858 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:55:36,058 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:55:36,059 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:55:36,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:55:36,059 INFO L82 PathProgramCache]: Analyzing trace with hash -28473709, now seen corresponding path program 3 times [2019-10-22 08:55:36,059 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:55:36,060 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738211148] [2019-10-22 08:55:36,060 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:55:36,060 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:55:36,060 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:55:36,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:36,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:36,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:36,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:36,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:36,221 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-22 08:55:36,221 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738211148] [2019-10-22 08:55:36,221 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431345308] [2019-10-22 08:55:36,221 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_138ea920-1cf9-406f-806c-a20efe2af162/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 [2019-10-22 08:55:36,252 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-22 08:55:36,252 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 08:55:36,253 INFO L256 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-22 08:55:36,254 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:55:36,290 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-22 08:55:36,291 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:55:36,291 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 12 [2019-10-22 08:55:36,291 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991398498] [2019-10-22 08:55:36,291 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-22 08:55:36,291 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:55:36,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-22 08:55:36,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2019-10-22 08:55:36,292 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 12 states. [2019-10-22 08:55:36,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:55:36,378 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2019-10-22 08:55:36,379 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-22 08:55:36,379 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2019-10-22 08:55:36,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:55:36,380 INFO L225 Difference]: With dead ends: 27 [2019-10-22 08:55:36,380 INFO L226 Difference]: Without dead ends: 23 [2019-10-22 08:55:36,380 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2019-10-22 08:55:36,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-10-22 08:55:36,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-10-22 08:55:36,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-10-22 08:55:36,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2019-10-22 08:55:36,384 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 27 [2019-10-22 08:55:36,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:55:36,384 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2019-10-22 08:55:36,385 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-22 08:55:36,385 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2019-10-22 08:55:36,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-10-22 08:55:36,388 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:55:36,388 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:55:36,588 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:55:36,589 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:55:36,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:55:36,589 INFO L82 PathProgramCache]: Analyzing trace with hash -2080894167, now seen corresponding path program 4 times [2019-10-22 08:55:36,589 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:55:36,589 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557678400] [2019-10-22 08:55:36,589 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:55:36,590 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:55:36,590 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:55:36,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:36,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:36,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:36,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:36,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:36,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:36,787 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-10-22 08:55:36,787 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557678400] [2019-10-22 08:55:36,789 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910687419] [2019-10-22 08:55:36,789 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_138ea920-1cf9-406f-806c-a20efe2af162/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 [2019-10-22 08:55:36,821 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-22 08:55:36,821 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 08:55:36,823 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-22 08:55:36,825 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:55:36,861 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-10-22 08:55:36,862 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:55:36,862 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 13 [2019-10-22 08:55:36,862 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268496118] [2019-10-22 08:55:36,863 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-22 08:55:36,863 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:55:36,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-22 08:55:36,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2019-10-22 08:55:36,864 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 13 states. [2019-10-22 08:55:36,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:55:36,951 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2019-10-22 08:55:36,951 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-22 08:55:36,951 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 33 [2019-10-22 08:55:36,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:55:36,952 INFO L225 Difference]: With dead ends: 30 [2019-10-22 08:55:36,952 INFO L226 Difference]: Without dead ends: 26 [2019-10-22 08:55:36,953 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2019-10-22 08:55:36,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-10-22 08:55:36,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-10-22 08:55:36,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-22 08:55:36,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2019-10-22 08:55:36,958 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 33 [2019-10-22 08:55:36,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:55:36,958 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2019-10-22 08:55:36,958 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-22 08:55:36,958 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2019-10-22 08:55:36,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-10-22 08:55:36,959 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:55:36,959 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:55:37,160 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:55:37,160 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:55:37,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:55:37,161 INFO L82 PathProgramCache]: Analyzing trace with hash -687460973, now seen corresponding path program 5 times [2019-10-22 08:55:37,161 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:55:37,161 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240157216] [2019-10-22 08:55:37,161 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:55:37,161 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:55:37,161 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:55:37,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:37,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:37,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:37,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:37,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:37,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:37,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:37,363 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-10-22 08:55:37,363 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240157216] [2019-10-22 08:55:37,364 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966472677] [2019-10-22 08:55:37,364 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_138ea920-1cf9-406f-806c-a20efe2af162/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 [2019-10-22 08:55:37,403 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-10-22 08:55:37,403 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 08:55:37,404 INFO L256 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-22 08:55:37,406 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:55:37,443 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-10-22 08:55:37,443 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:55:37,443 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 14 [2019-10-22 08:55:37,443 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845669508] [2019-10-22 08:55:37,444 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-22 08:55:37,444 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:55:37,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-22 08:55:37,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-10-22 08:55:37,444 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 14 states. [2019-10-22 08:55:37,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:55:37,534 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2019-10-22 08:55:37,535 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-22 08:55:37,535 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 39 [2019-10-22 08:55:37,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:55:37,536 INFO L225 Difference]: With dead ends: 33 [2019-10-22 08:55:37,536 INFO L226 Difference]: Without dead ends: 29 [2019-10-22 08:55:37,536 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2019-10-22 08:55:37,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-10-22 08:55:37,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-10-22 08:55:37,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-22 08:55:37,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2019-10-22 08:55:37,540 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 39 [2019-10-22 08:55:37,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:55:37,541 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2019-10-22 08:55:37,541 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-22 08:55:37,541 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2019-10-22 08:55:37,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-10-22 08:55:37,542 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:55:37,542 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:55:37,743 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:55:37,743 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:55:37,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:55:37,743 INFO L82 PathProgramCache]: Analyzing trace with hash 547744169, now seen corresponding path program 6 times [2019-10-22 08:55:37,744 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:55:37,744 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80197234] [2019-10-22 08:55:37,744 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:55:37,744 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:55:37,744 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:55:37,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:37,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:37,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:37,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:37,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:37,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:37,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:37,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:37,945 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-10-22 08:55:37,945 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80197234] [2019-10-22 08:55:37,947 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644242020] [2019-10-22 08:55:37,947 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_138ea920-1cf9-406f-806c-a20efe2af162/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 [2019-10-22 08:55:37,988 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-10-22 08:55:37,988 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 08:55:37,989 INFO L256 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-22 08:55:37,990 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:55:38,194 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-10-22 08:55:38,194 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:55:38,194 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17] total 28 [2019-10-22 08:55:38,194 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157821181] [2019-10-22 08:55:38,195 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-10-22 08:55:38,195 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:55:38,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-10-22 08:55:38,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2019-10-22 08:55:38,195 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 28 states. [2019-10-22 08:55:38,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:55:38,490 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2019-10-22 08:55:38,490 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-22 08:55:38,490 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 45 [2019-10-22 08:55:38,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:55:38,491 INFO L225 Difference]: With dead ends: 36 [2019-10-22 08:55:38,491 INFO L226 Difference]: Without dead ends: 32 [2019-10-22 08:55:38,492 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=285, Invalid=1355, Unknown=0, NotChecked=0, Total=1640 [2019-10-22 08:55:38,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-10-22 08:55:38,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-10-22 08:55:38,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-22 08:55:38,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2019-10-22 08:55:38,498 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 45 [2019-10-22 08:55:38,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:55:38,499 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2019-10-22 08:55:38,499 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-10-22 08:55:38,499 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2019-10-22 08:55:38,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-10-22 08:55:38,500 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:55:38,500 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:55:38,700 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:55:38,700 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:55:38,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:55:38,701 INFO L82 PathProgramCache]: Analyzing trace with hash -247823213, now seen corresponding path program 7 times [2019-10-22 08:55:38,701 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:55:38,701 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747009008] [2019-10-22 08:55:38,701 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:55:38,701 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:55:38,701 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:55:38,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:38,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:38,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:38,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:38,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:38,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:38,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:38,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:38,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:38,874 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-10-22 08:55:38,874 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747009008] [2019-10-22 08:55:38,874 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229885548] [2019-10-22 08:55:38,874 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_138ea920-1cf9-406f-806c-a20efe2af162/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 [2019-10-22 08:55:38,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:38,905 INFO L256 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-22 08:55:38,906 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:55:38,953 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-10-22 08:55:38,953 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:55:38,954 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 16 [2019-10-22 08:55:38,954 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081860967] [2019-10-22 08:55:38,954 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-22 08:55:38,954 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:55:38,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-22 08:55:38,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2019-10-22 08:55:38,955 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 16 states. [2019-10-22 08:55:39,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:55:39,067 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2019-10-22 08:55:39,067 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-22 08:55:39,068 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 51 [2019-10-22 08:55:39,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:55:39,068 INFO L225 Difference]: With dead ends: 39 [2019-10-22 08:55:39,068 INFO L226 Difference]: Without dead ends: 35 [2019-10-22 08:55:39,069 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2019-10-22 08:55:39,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-10-22 08:55:39,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2019-10-22 08:55:39,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-10-22 08:55:39,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2019-10-22 08:55:39,075 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 51 [2019-10-22 08:55:39,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:55:39,076 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2019-10-22 08:55:39,076 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-22 08:55:39,076 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2019-10-22 08:55:39,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-10-22 08:55:39,077 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:55:39,077 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:55:39,277 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:55:39,278 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:55:39,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:55:39,278 INFO L82 PathProgramCache]: Analyzing trace with hash -1818636247, now seen corresponding path program 8 times [2019-10-22 08:55:39,278 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:55:39,278 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983310452] [2019-10-22 08:55:39,278 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:55:39,279 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:55:39,279 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:55:39,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:39,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:39,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:39,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:39,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:39,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:39,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:39,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:39,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:39,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:39,484 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-10-22 08:55:39,484 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983310452] [2019-10-22 08:55:39,484 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581111321] [2019-10-22 08:55:39,484 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_138ea920-1cf9-406f-806c-a20efe2af162/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 [2019-10-22 08:55:39,512 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 08:55:39,513 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 08:55:39,514 INFO L256 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2019-10-22 08:55:39,515 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:55:39,572 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-10-22 08:55:39,573 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:55:39,573 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 17 [2019-10-22 08:55:39,573 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055509912] [2019-10-22 08:55:39,573 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-22 08:55:39,573 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:55:39,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-22 08:55:39,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2019-10-22 08:55:39,574 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 17 states. [2019-10-22 08:55:39,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:55:39,698 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2019-10-22 08:55:39,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-22 08:55:39,699 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 57 [2019-10-22 08:55:39,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:55:39,700 INFO L225 Difference]: With dead ends: 42 [2019-10-22 08:55:39,700 INFO L226 Difference]: Without dead ends: 38 [2019-10-22 08:55:39,700 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=195, Invalid=455, Unknown=0, NotChecked=0, Total=650 [2019-10-22 08:55:39,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-10-22 08:55:39,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-10-22 08:55:39,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-10-22 08:55:39,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2019-10-22 08:55:39,705 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 57 [2019-10-22 08:55:39,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:55:39,708 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2019-10-22 08:55:39,709 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-22 08:55:39,709 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2019-10-22 08:55:39,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-10-22 08:55:39,710 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:55:39,710 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:55:39,910 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:55:39,911 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:55:39,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:55:39,911 INFO L82 PathProgramCache]: Analyzing trace with hash -2055304301, now seen corresponding path program 9 times [2019-10-22 08:55:39,911 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:55:39,911 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979559158] [2019-10-22 08:55:39,911 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:55:39,911 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:55:39,911 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:55:39,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:39,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:39,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:39,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:40,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:40,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:40,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:40,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:40,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:40,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:40,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:40,167 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2019-10-22 08:55:40,167 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979559158] [2019-10-22 08:55:40,167 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104256192] [2019-10-22 08:55:40,167 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_138ea920-1cf9-406f-806c-a20efe2af162/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 [2019-10-22 08:55:40,206 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-10-22 08:55:40,206 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 08:55:40,207 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-22 08:55:40,209 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:55:40,546 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2019-10-22 08:55:40,547 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:55:40,547 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 23] total 37 [2019-10-22 08:55:40,547 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787429761] [2019-10-22 08:55:40,548 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-10-22 08:55:40,548 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:55:40,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-10-22 08:55:40,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1133, Unknown=0, NotChecked=0, Total=1332 [2019-10-22 08:55:40,548 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 37 states. [2019-10-22 08:55:40,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:55:40,955 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2019-10-22 08:55:40,955 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-22 08:55:40,955 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 63 [2019-10-22 08:55:40,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:55:40,956 INFO L225 Difference]: With dead ends: 45 [2019-10-22 08:55:40,956 INFO L226 Difference]: Without dead ends: 41 [2019-10-22 08:55:40,957 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=537, Invalid=2543, Unknown=0, NotChecked=0, Total=3080 [2019-10-22 08:55:40,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-10-22 08:55:40,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2019-10-22 08:55:40,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-10-22 08:55:40,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2019-10-22 08:55:40,962 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 63 [2019-10-22 08:55:40,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:55:40,963 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2019-10-22 08:55:40,963 INFO L463 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-10-22 08:55:40,963 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2019-10-22 08:55:40,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-10-22 08:55:40,964 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:55:40,964 INFO L380 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:55:41,164 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:55:41,164 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:55:41,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:55:41,165 INFO L82 PathProgramCache]: Analyzing trace with hash -1172322647, now seen corresponding path program 10 times [2019-10-22 08:55:41,165 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:55:41,165 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201219138] [2019-10-22 08:55:41,165 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:55:41,165 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:55:41,165 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:55:41,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:41,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:41,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:41,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:41,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:41,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:41,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:41,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:41,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:41,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:41,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:41,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:41,407 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2019-10-22 08:55:41,407 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201219138] [2019-10-22 08:55:41,407 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661698750] [2019-10-22 08:55:41,408 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_138ea920-1cf9-406f-806c-a20efe2af162/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 [2019-10-22 08:55:41,447 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-22 08:55:41,447 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 08:55:41,448 INFO L256 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-22 08:55:41,450 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:55:41,506 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2019-10-22 08:55:41,506 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:55:41,506 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 19 [2019-10-22 08:55:41,507 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019722659] [2019-10-22 08:55:41,507 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-22 08:55:41,507 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:55:41,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-22 08:55:41,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2019-10-22 08:55:41,508 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 19 states. [2019-10-22 08:55:41,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:55:41,639 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2019-10-22 08:55:41,639 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-22 08:55:41,639 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 69 [2019-10-22 08:55:41,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:55:41,641 INFO L225 Difference]: With dead ends: 48 [2019-10-22 08:55:41,641 INFO L226 Difference]: Without dead ends: 44 [2019-10-22 08:55:41,642 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=268, Invalid=602, Unknown=0, NotChecked=0, Total=870 [2019-10-22 08:55:41,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-10-22 08:55:41,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-10-22 08:55:41,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-10-22 08:55:41,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2019-10-22 08:55:41,647 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 69 [2019-10-22 08:55:41,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:55:41,647 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2019-10-22 08:55:41,647 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-22 08:55:41,647 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2019-10-22 08:55:41,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-10-22 08:55:41,648 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:55:41,648 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:55:41,848 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:55:41,849 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:55:41,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:55:41,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1452916077, now seen corresponding path program 11 times [2019-10-22 08:55:41,849 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:55:41,849 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531125110] [2019-10-22 08:55:41,849 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:55:41,849 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:55:41,850 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:55:41,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:41,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:41,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:41,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:41,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:41,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:42,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:42,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:42,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:42,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:42,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:42,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:42,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:42,178 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-10-22 08:55:42,178 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531125110] [2019-10-22 08:55:42,178 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004367671] [2019-10-22 08:55:42,178 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_138ea920-1cf9-406f-806c-a20efe2af162/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 [2019-10-22 08:55:42,236 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-10-22 08:55:42,237 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 08:55:42,238 INFO L256 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 26 conjunts are in the unsatisfiable core [2019-10-22 08:55:42,240 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:55:42,293 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-10-22 08:55:42,294 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:55:42,294 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 20 [2019-10-22 08:55:42,294 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482756897] [2019-10-22 08:55:42,294 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-22 08:55:42,294 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:55:42,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-22 08:55:42,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=264, Unknown=0, NotChecked=0, Total=380 [2019-10-22 08:55:42,295 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 20 states. [2019-10-22 08:55:42,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:55:42,447 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2019-10-22 08:55:42,447 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-22 08:55:42,447 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 75 [2019-10-22 08:55:42,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:55:42,448 INFO L225 Difference]: With dead ends: 51 [2019-10-22 08:55:42,448 INFO L226 Difference]: Without dead ends: 47 [2019-10-22 08:55:42,449 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=309, Invalid=683, Unknown=0, NotChecked=0, Total=992 [2019-10-22 08:55:42,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-10-22 08:55:42,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2019-10-22 08:55:42,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-10-22 08:55:42,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2019-10-22 08:55:42,453 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 75 [2019-10-22 08:55:42,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:55:42,454 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2019-10-22 08:55:42,454 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-22 08:55:42,454 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2019-10-22 08:55:42,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-10-22 08:55:42,455 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:55:42,455 INFO L380 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:55:42,655 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:55:42,655 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:55:42,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:55:42,656 INFO L82 PathProgramCache]: Analyzing trace with hash -461124311, now seen corresponding path program 12 times [2019-10-22 08:55:42,656 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:55:42,656 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998327801] [2019-10-22 08:55:42,656 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:55:42,656 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:55:42,656 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:55:42,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:42,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:42,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:42,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:42,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:42,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:42,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:42,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:42,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:42,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:42,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:42,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:42,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:42,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:42,953 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2019-10-22 08:55:42,954 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998327801] [2019-10-22 08:55:42,954 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813229111] [2019-10-22 08:55:42,954 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_138ea920-1cf9-406f-806c-a20efe2af162/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 [2019-10-22 08:55:43,003 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-10-22 08:55:43,003 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 08:55:43,004 INFO L256 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 28 conjunts are in the unsatisfiable core [2019-10-22 08:55:43,006 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:55:43,072 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2019-10-22 08:55:43,073 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:55:43,073 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 21 [2019-10-22 08:55:43,073 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005631534] [2019-10-22 08:55:43,073 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-22 08:55:43,074 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:55:43,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-22 08:55:43,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=289, Unknown=0, NotChecked=0, Total=420 [2019-10-22 08:55:43,074 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 21 states. [2019-10-22 08:55:43,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:55:43,236 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2019-10-22 08:55:43,236 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-22 08:55:43,236 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 81 [2019-10-22 08:55:43,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:55:43,237 INFO L225 Difference]: With dead ends: 54 [2019-10-22 08:55:43,237 INFO L226 Difference]: Without dead ends: 50 [2019-10-22 08:55:43,237 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=353, Invalid=769, Unknown=0, NotChecked=0, Total=1122 [2019-10-22 08:55:43,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-10-22 08:55:43,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2019-10-22 08:55:43,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-10-22 08:55:43,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2019-10-22 08:55:43,242 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 81 [2019-10-22 08:55:43,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:55:43,242 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2019-10-22 08:55:43,242 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-22 08:55:43,242 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2019-10-22 08:55:43,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-10-22 08:55:43,243 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:55:43,243 INFO L380 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:55:43,443 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:55:43,444 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:55:43,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:55:43,444 INFO L82 PathProgramCache]: Analyzing trace with hash -1887065709, now seen corresponding path program 13 times [2019-10-22 08:55:43,444 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:55:43,444 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812363902] [2019-10-22 08:55:43,444 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:55:43,444 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:55:43,444 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:55:43,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:43,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:43,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:43,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:43,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:43,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:43,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:43,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:43,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:43,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:43,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:43,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:43,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:43,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:43,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:43,790 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2019-10-22 08:55:43,790 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812363902] [2019-10-22 08:55:43,790 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953195112] [2019-10-22 08:55:43,791 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_138ea920-1cf9-406f-806c-a20efe2af162/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 [2019-10-22 08:55:43,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:43,864 INFO L256 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 30 conjunts are in the unsatisfiable core [2019-10-22 08:55:43,866 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:55:43,912 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2019-10-22 08:55:43,912 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:55:43,912 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 22 [2019-10-22 08:55:43,912 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057069673] [2019-10-22 08:55:43,913 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-22 08:55:43,913 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:55:43,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-22 08:55:43,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=315, Unknown=0, NotChecked=0, Total=462 [2019-10-22 08:55:43,913 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 22 states. [2019-10-22 08:55:44,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:55:44,044 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2019-10-22 08:55:44,044 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-22 08:55:44,044 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 87 [2019-10-22 08:55:44,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:55:44,045 INFO L225 Difference]: With dead ends: 57 [2019-10-22 08:55:44,045 INFO L226 Difference]: Without dead ends: 53 [2019-10-22 08:55:44,045 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=400, Invalid=860, Unknown=0, NotChecked=0, Total=1260 [2019-10-22 08:55:44,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-10-22 08:55:44,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2019-10-22 08:55:44,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-10-22 08:55:44,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2019-10-22 08:55:44,052 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 87 [2019-10-22 08:55:44,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:55:44,052 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2019-10-22 08:55:44,052 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-22 08:55:44,052 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2019-10-22 08:55:44,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-10-22 08:55:44,053 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:55:44,053 INFO L380 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:55:44,253 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:55:44,254 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:55:44,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:55:44,254 INFO L82 PathProgramCache]: Analyzing trace with hash -1777212503, now seen corresponding path program 14 times [2019-10-22 08:55:44,254 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:55:44,254 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715054755] [2019-10-22 08:55:44,254 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:55:44,254 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:55:44,254 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:55:44,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:44,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:44,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:44,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:44,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:44,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:44,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:44,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:44,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:44,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:44,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:44,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:44,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:44,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:44,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:44,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:44,670 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2019-10-22 08:55:44,670 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715054755] [2019-10-22 08:55:44,670 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730596635] [2019-10-22 08:55:44,670 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_138ea920-1cf9-406f-806c-a20efe2af162/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 [2019-10-22 08:55:44,717 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 08:55:44,717 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 08:55:44,718 INFO L256 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 32 conjunts are in the unsatisfiable core [2019-10-22 08:55:44,720 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:55:44,776 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2019-10-22 08:55:44,776 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:55:44,776 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 23 [2019-10-22 08:55:44,776 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018962255] [2019-10-22 08:55:44,777 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-22 08:55:44,778 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:55:44,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-22 08:55:44,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=342, Unknown=0, NotChecked=0, Total=506 [2019-10-22 08:55:44,778 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 23 states. [2019-10-22 08:55:44,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:55:44,955 INFO L93 Difference]: Finished difference Result 60 states and 61 transitions. [2019-10-22 08:55:44,956 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-22 08:55:44,956 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 93 [2019-10-22 08:55:44,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:55:44,957 INFO L225 Difference]: With dead ends: 60 [2019-10-22 08:55:44,957 INFO L226 Difference]: Without dead ends: 56 [2019-10-22 08:55:44,957 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=450, Invalid=956, Unknown=0, NotChecked=0, Total=1406 [2019-10-22 08:55:44,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-10-22 08:55:44,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2019-10-22 08:55:44,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-10-22 08:55:44,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2019-10-22 08:55:44,961 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 93 [2019-10-22 08:55:44,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:55:44,961 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2019-10-22 08:55:44,961 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-10-22 08:55:44,961 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2019-10-22 08:55:44,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-10-22 08:55:44,962 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:55:44,962 INFO L380 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:55:45,163 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:55:45,163 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:55:45,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:55:45,163 INFO L82 PathProgramCache]: Analyzing trace with hash -948911981, now seen corresponding path program 15 times [2019-10-22 08:55:45,163 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:55:45,163 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2384407] [2019-10-22 08:55:45,163 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:55:45,164 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:55:45,164 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:55:45,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:45,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:45,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:45,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:45,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:45,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:45,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:45,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:45,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:45,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:45,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:45,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:45,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:45,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:45,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:45,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:45,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:45,600 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2019-10-22 08:55:45,600 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2384407] [2019-10-22 08:55:45,601 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071747961] [2019-10-22 08:55:45,601 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_138ea920-1cf9-406f-806c-a20efe2af162/bin/uautomizer/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:55:45,664 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2019-10-22 08:55:45,664 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 08:55:45,665 INFO L256 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 34 conjunts are in the unsatisfiable core [2019-10-22 08:55:45,667 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:55:45,726 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2019-10-22 08:55:45,727 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:55:45,727 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 24 [2019-10-22 08:55:45,727 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172226764] [2019-10-22 08:55:45,728 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-22 08:55:45,728 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:55:45,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-22 08:55:45,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=370, Unknown=0, NotChecked=0, Total=552 [2019-10-22 08:55:45,729 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand 24 states. [2019-10-22 08:55:45,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:55:45,937 INFO L93 Difference]: Finished difference Result 63 states and 64 transitions. [2019-10-22 08:55:45,938 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-22 08:55:45,938 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 99 [2019-10-22 08:55:45,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:55:45,938 INFO L225 Difference]: With dead ends: 63 [2019-10-22 08:55:45,938 INFO L226 Difference]: Without dead ends: 59 [2019-10-22 08:55:45,939 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=503, Invalid=1057, Unknown=0, NotChecked=0, Total=1560 [2019-10-22 08:55:45,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-10-22 08:55:45,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2019-10-22 08:55:45,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-10-22 08:55:45,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2019-10-22 08:55:45,947 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 99 [2019-10-22 08:55:45,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:55:45,947 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2019-10-22 08:55:45,947 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-22 08:55:45,947 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2019-10-22 08:55:45,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-10-22 08:55:45,948 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:55:45,948 INFO L380 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:55:46,149 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:55:46,150 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:55:46,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:55:46,150 INFO L82 PathProgramCache]: Analyzing trace with hash 1159072297, now seen corresponding path program 16 times [2019-10-22 08:55:46,150 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:55:46,150 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635036490] [2019-10-22 08:55:46,151 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:55:46,151 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:55:46,151 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:55:46,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:46,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:46,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:46,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:46,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:46,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:46,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:46,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:46,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:46,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:46,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:46,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:46,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:46,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:46,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:46,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:46,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:46,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:46,601 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2019-10-22 08:55:46,601 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635036490] [2019-10-22 08:55:46,602 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552890804] [2019-10-22 08:55:46,602 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_138ea920-1cf9-406f-806c-a20efe2af162/bin/uautomizer/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:55:46,653 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-22 08:55:46,653 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 08:55:46,654 INFO L256 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 36 conjunts are in the unsatisfiable core [2019-10-22 08:55:46,656 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:55:46,729 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2019-10-22 08:55:46,730 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:55:46,730 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 25 [2019-10-22 08:55:46,730 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354848400] [2019-10-22 08:55:46,731 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-10-22 08:55:46,732 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:55:46,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-10-22 08:55:46,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=399, Unknown=0, NotChecked=0, Total=600 [2019-10-22 08:55:46,733 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 25 states. [2019-10-22 08:55:46,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:55:46,941 INFO L93 Difference]: Finished difference Result 66 states and 67 transitions. [2019-10-22 08:55:46,941 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-22 08:55:46,941 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 105 [2019-10-22 08:55:46,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:55:46,942 INFO L225 Difference]: With dead ends: 66 [2019-10-22 08:55:46,942 INFO L226 Difference]: Without dead ends: 62 [2019-10-22 08:55:46,943 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=559, Invalid=1163, Unknown=0, NotChecked=0, Total=1722 [2019-10-22 08:55:46,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-10-22 08:55:46,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2019-10-22 08:55:46,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-10-22 08:55:46,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2019-10-22 08:55:46,955 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 105 [2019-10-22 08:55:46,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:55:46,955 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2019-10-22 08:55:46,955 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-10-22 08:55:46,955 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2019-10-22 08:55:46,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2019-10-22 08:55:46,956 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:55:46,956 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:55:47,158 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:55:47,159 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:55:47,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:55:47,159 INFO L82 PathProgramCache]: Analyzing trace with hash 2109441939, now seen corresponding path program 17 times [2019-10-22 08:55:47,159 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:55:47,160 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842645000] [2019-10-22 08:55:47,160 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:55:47,160 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:55:47,160 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:55:47,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:47,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:47,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:47,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:47,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:47,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:47,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:47,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:47,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:47,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:47,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:47,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:47,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:47,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:47,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:47,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:47,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:47,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:47,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:47,695 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2019-10-22 08:55:47,696 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842645000] [2019-10-22 08:55:47,696 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882964012] [2019-10-22 08:55:47,696 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_138ea920-1cf9-406f-806c-a20efe2af162/bin/uautomizer/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:55:47,768 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2019-10-22 08:55:47,769 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 08:55:47,770 INFO L256 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 38 conjunts are in the unsatisfiable core [2019-10-22 08:55:47,772 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:55:47,835 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2019-10-22 08:55:47,836 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:55:47,836 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 26 [2019-10-22 08:55:47,836 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087193851] [2019-10-22 08:55:47,836 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-10-22 08:55:47,837 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:55:47,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-10-22 08:55:47,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=429, Unknown=0, NotChecked=0, Total=650 [2019-10-22 08:55:47,837 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand 26 states. [2019-10-22 08:55:48,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:55:48,064 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2019-10-22 08:55:48,064 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-22 08:55:48,064 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 111 [2019-10-22 08:55:48,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:55:48,065 INFO L225 Difference]: With dead ends: 69 [2019-10-22 08:55:48,065 INFO L226 Difference]: Without dead ends: 65 [2019-10-22 08:55:48,066 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=618, Invalid=1274, Unknown=0, NotChecked=0, Total=1892 [2019-10-22 08:55:48,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-10-22 08:55:48,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2019-10-22 08:55:48,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-10-22 08:55:48,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2019-10-22 08:55:48,070 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 111 [2019-10-22 08:55:48,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:55:48,071 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2019-10-22 08:55:48,071 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-10-22 08:55:48,071 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2019-10-22 08:55:48,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2019-10-22 08:55:48,072 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:55:48,072 INFO L380 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:55:48,273 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:55:48,273 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:55:48,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:55:48,273 INFO L82 PathProgramCache]: Analyzing trace with hash 450642089, now seen corresponding path program 18 times [2019-10-22 08:55:48,273 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:55:48,273 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308417304] [2019-10-22 08:55:48,273 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:55:48,273 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:55:48,274 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:55:48,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:48,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:48,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:48,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:48,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:48,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:48,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:48,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:48,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:48,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:48,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:48,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:48,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:48,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:48,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:48,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:48,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:48,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:48,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:48,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:48,928 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2019-10-22 08:55:48,928 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308417304] [2019-10-22 08:55:48,928 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348004588] [2019-10-22 08:55:48,928 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_138ea920-1cf9-406f-806c-a20efe2af162/bin/uautomizer/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:55:49,019 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-10-22 08:55:49,019 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 08:55:49,021 INFO L256 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 40 conjunts are in the unsatisfiable core [2019-10-22 08:55:49,023 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:55:49,080 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2019-10-22 08:55:49,080 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:55:49,080 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23] total 27 [2019-10-22 08:55:49,080 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822432366] [2019-10-22 08:55:49,081 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-10-22 08:55:49,081 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:55:49,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-10-22 08:55:49,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=460, Unknown=0, NotChecked=0, Total=702 [2019-10-22 08:55:49,082 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 27 states. [2019-10-22 08:55:49,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:55:49,287 INFO L93 Difference]: Finished difference Result 72 states and 73 transitions. [2019-10-22 08:55:49,287 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-22 08:55:49,287 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 117 [2019-10-22 08:55:49,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:55:49,288 INFO L225 Difference]: With dead ends: 72 [2019-10-22 08:55:49,288 INFO L226 Difference]: Without dead ends: 68 [2019-10-22 08:55:49,289 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=680, Invalid=1390, Unknown=0, NotChecked=0, Total=2070 [2019-10-22 08:55:49,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-10-22 08:55:49,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2019-10-22 08:55:49,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-10-22 08:55:49,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2019-10-22 08:55:49,302 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 117 [2019-10-22 08:55:49,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:55:49,302 INFO L462 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2019-10-22 08:55:49,302 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-10-22 08:55:49,302 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2019-10-22 08:55:49,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-10-22 08:55:49,303 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:55:49,304 INFO L380 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:55:49,504 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:55:49,504 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:55:49,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:55:49,504 INFO L82 PathProgramCache]: Analyzing trace with hash -1141244269, now seen corresponding path program 19 times [2019-10-22 08:55:49,504 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:55:49,505 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782459685] [2019-10-22 08:55:49,505 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:55:49,505 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:55:49,505 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:55:49,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:49,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:49,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:49,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:49,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:49,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:49,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:49,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:49,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:49,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:49,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:49,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:49,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:49,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:49,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:49,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:49,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:49,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:49,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:49,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:50,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:50,078 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2019-10-22 08:55:50,078 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782459685] [2019-10-22 08:55:50,078 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456941723] [2019-10-22 08:55:50,078 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_138ea920-1cf9-406f-806c-a20efe2af162/bin/uautomizer/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:55:50,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:55:50,130 INFO L256 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 42 conjunts are in the unsatisfiable core [2019-10-22 08:55:50,132 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:55:50,208 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2019-10-22 08:55:50,208 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:55:50,208 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 24] total 28 [2019-10-22 08:55:50,208 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097203002] [2019-10-22 08:55:50,209 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-10-22 08:55:50,209 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:55:50,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-10-22 08:55:50,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=492, Unknown=0, NotChecked=0, Total=756 [2019-10-22 08:55:50,210 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand 28 states. [2019-10-22 08:55:50,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:55:50,433 INFO L93 Difference]: Finished difference Result 75 states and 76 transitions. [2019-10-22 08:55:50,433 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-10-22 08:55:50,433 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 123 [2019-10-22 08:55:50,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:55:50,434 INFO L225 Difference]: With dead ends: 75 [2019-10-22 08:55:50,434 INFO L226 Difference]: Without dead ends: 71 [2019-10-22 08:55:50,435 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=745, Invalid=1511, Unknown=0, NotChecked=0, Total=2256 [2019-10-22 08:55:50,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-10-22 08:55:50,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2019-10-22 08:55:50,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-10-22 08:55:50,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2019-10-22 08:55:50,437 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 123 [2019-10-22 08:55:50,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:55:50,437 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2019-10-22 08:55:50,438 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-10-22 08:55:50,438 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2019-10-22 08:55:50,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2019-10-22 08:55:50,439 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:55:50,439 INFO L380 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:55:50,639 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:55:50,640 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:55:50,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:55:50,640 INFO L82 PathProgramCache]: Analyzing trace with hash -1280276695, now seen corresponding path program 20 times [2019-10-22 08:55:50,640 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:55:50,640 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313979077] [2019-10-22 08:55:50,640 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:55:50,640 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:55:50,640 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:55:50,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:55:50,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:55:50,687 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 08:55:50,687 INFO L445 BasicCegarLoop]: Counterexample might be feasible [2019-10-22 08:55:50,723 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 08:55:50 BoogieIcfgContainer [2019-10-22 08:55:50,723 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-22 08:55:50,723 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-10-22 08:55:50,724 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-10-22 08:55:50,724 INFO L275 PluginConnector]: Witness Printer initialized [2019-10-22 08:55:50,724 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 08:55:34" (3/4) ... [2019-10-22 08:55:50,727 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-10-22 08:55:50,783 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_138ea920-1cf9-406f-806c-a20efe2af162/bin/uautomizer/witness.graphml [2019-10-22 08:55:50,785 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-10-22 08:55:50,787 INFO L168 Benchmark]: Toolchain (without parser) took 16764.03 ms. Allocated memory was 1.0 GB in the beginning and 1.6 GB in the end (delta: 531.6 MB). Free memory was 944.5 MB in the beginning and 1.5 GB in the end (delta: -545.2 MB). There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 08:55:50,788 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 1.0 GB. Free memory is still 967.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 08:55:50,788 INFO L168 Benchmark]: CACSL2BoogieTranslator took 227.37 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 191.4 MB). Free memory was 944.5 MB in the beginning and 1.2 GB in the end (delta: -239.0 MB). Peak memory consumption was 22.9 MB. Max. memory is 11.5 GB. [2019-10-22 08:55:50,788 INFO L168 Benchmark]: Boogie Procedure Inliner took 31.33 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 08:55:50,788 INFO L168 Benchmark]: Boogie Preprocessor took 12.51 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 08:55:50,789 INFO L168 Benchmark]: RCFGBuilder took 223.76 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 13.9 MB). Peak memory consumption was 13.9 MB. Max. memory is 11.5 GB. [2019-10-22 08:55:50,789 INFO L168 Benchmark]: TraceAbstraction took 16203.05 ms. Allocated memory was 1.2 GB in the beginning and 1.6 GB in the end (delta: 340.3 MB). Free memory was 1.2 GB in the beginning and 1.5 GB in the end (delta: -324.3 MB). Peak memory consumption was 15.9 MB. Max. memory is 11.5 GB. [2019-10-22 08:55:50,790 INFO L168 Benchmark]: Witness Printer took 62.19 ms. Allocated memory is still 1.6 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 4.3 MB). Peak memory consumption was 4.3 MB. Max. memory is 11.5 GB. [2019-10-22 08:55:50,791 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 1.0 GB. Free memory is still 967.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 227.37 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 191.4 MB). Free memory was 944.5 MB in the beginning and 1.2 GB in the end (delta: -239.0 MB). Peak memory consumption was 22.9 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 31.33 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 12.51 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 223.76 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 13.9 MB). Peak memory consumption was 13.9 MB. Max. memory is 11.5 GB. * TraceAbstraction took 16203.05 ms. Allocated memory was 1.2 GB in the beginning and 1.6 GB in the end (delta: 340.3 MB). Free memory was 1.2 GB in the beginning and 1.5 GB in the end (delta: -324.3 MB). Peak memory consumption was 15.9 MB. Max. memory is 11.5 GB. * Witness Printer took 62.19 ms. Allocated memory is still 1.6 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 4.3 MB). Peak memory consumption was 4.3 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L10] int input = 20; [L11] CALL, EXPR id(input) VAL [\old(x)=20] [L5] COND FALSE !(x==0) VAL [\old(x)=20, x=20] [L6] CALL, EXPR id(x-1) VAL [\old(x)=19] [L5] COND FALSE !(x==0) VAL [\old(x)=19, x=19] [L6] CALL, EXPR id(x-1) VAL [\old(x)=18] [L5] COND FALSE !(x==0) VAL [\old(x)=18, x=18] [L6] CALL, EXPR id(x-1) VAL [\old(x)=17] [L5] COND FALSE !(x==0) VAL [\old(x)=17, x=17] [L6] CALL, EXPR id(x-1) VAL [\old(x)=16] [L5] COND FALSE !(x==0) VAL [\old(x)=16, x=16] [L6] CALL, EXPR id(x-1) VAL [\old(x)=15] [L5] COND FALSE !(x==0) VAL [\old(x)=15, x=15] [L6] CALL, EXPR id(x-1) VAL [\old(x)=14] [L5] COND FALSE !(x==0) VAL [\old(x)=14, x=14] [L6] CALL, EXPR id(x-1) VAL [\old(x)=13] [L5] COND FALSE !(x==0) VAL [\old(x)=13, x=13] [L6] CALL, EXPR id(x-1) VAL [\old(x)=12] [L5] COND FALSE !(x==0) VAL [\old(x)=12, x=12] [L6] CALL, EXPR id(x-1) VAL [\old(x)=11] [L5] COND FALSE !(x==0) VAL [\old(x)=11, x=11] [L6] CALL, EXPR id(x-1) VAL [\old(x)=10] [L5] COND FALSE !(x==0) VAL [\old(x)=10, x=10] [L6] CALL, EXPR id(x-1) VAL [\old(x)=9] [L5] COND FALSE !(x==0) VAL [\old(x)=9, x=9] [L6] CALL, EXPR id(x-1) VAL [\old(x)=8] [L5] COND FALSE !(x==0) VAL [\old(x)=8, x=8] [L6] CALL, EXPR id(x-1) VAL [\old(x)=7] [L5] COND FALSE !(x==0) VAL [\old(x)=7, x=7] [L6] CALL, EXPR id(x-1) VAL [\old(x)=6] [L5] COND FALSE !(x==0) VAL [\old(x)=6, x=6] [L6] CALL, EXPR id(x-1) VAL [\old(x)=5] [L5] COND FALSE !(x==0) VAL [\old(x)=5, x=5] [L6] CALL, EXPR id(x-1) VAL [\old(x)=4] [L5] COND FALSE !(x==0) VAL [\old(x)=4, x=4] [L6] CALL, EXPR id(x-1) VAL [\old(x)=3] [L5] COND FALSE !(x==0) VAL [\old(x)=3, x=3] [L6] CALL, EXPR id(x-1) VAL [\old(x)=2] [L5] COND FALSE !(x==0) VAL [\old(x)=2, x=2] [L6] CALL, EXPR id(x-1) VAL [\old(x)=1] [L5] COND FALSE !(x==0) VAL [\old(x)=1, x=1] [L6] CALL, EXPR id(x-1) VAL [\old(x)=0] [L5] COND TRUE x==0 [L5] return 0; VAL [\old(x)=0, \result=0, x=0] [L6] RET, EXPR id(x-1) VAL [\old(x)=1, id(x-1)=0, x=1] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=2, id(x-1)=1, x=2] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=3, id(x-1)=2, x=3] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=4, id(x-1)=3, x=4] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=5, id(x-1)=4, x=5] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=6, id(x-1)=5, x=6] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=7, id(x-1)=6, x=7] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=8, id(x-1)=7, x=8] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=9, id(x-1)=8, x=9] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=10, id(x-1)=9, x=10] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=11, id(x-1)=10, x=11] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=12, id(x-1)=11, x=12] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=13, id(x-1)=12, x=13] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=14, id(x-1)=13, x=14] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=15, id(x-1)=14, x=15] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=16, id(x-1)=15, x=16] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=17, id(x-1)=16, x=17] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=18, id(x-1)=17, x=18] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=19, id(x-1)=18, x=19] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=20, id(x-1)=19, x=20] [L6] return id(x-1) + 1; [L11] RET, EXPR id(input) [L11] int result = id(input); [L12] COND TRUE result == 20 [L13] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 15 locations, 1 error locations. Result: UNSAFE, OverallTime: 16.1s, OverallIterations: 21, TraceHistogramMax: 21, AutomataDifference: 3.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 181 SDtfs, 715 SDslu, 1213 SDs, 0 SdLazy, 1196 SolverSat, 175 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2227 GetRequests, 1642 SyntacticMatches, 0 SemanticMatches, 585 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3493 ImplicationChecksByTransitivity, 5.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=71occurred in iteration=20, 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, 20 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 7.2s InterpolantComputationTime, 2760 NumberOfCodeBlocks, 2760 NumberOfCodeBlocksAsserted, 142 NumberOfCheckSat, 2592 ConstructedInterpolants, 0 QuantifiedInterpolants, 567664 SizeOfPredicates, 211 NumberOfNonLiveVariables, 3116 ConjunctsInSsa, 456 ConjunctsInUnsatCore, 39 InterpolantComputations, 1 PerfectInterpolantSequences, 7600/15200 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...