./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-lit/ddlm2013.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cad46833 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_c5013309-fd47-4fa8-93cf-7a49476e841c/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_c5013309-fd47-4fa8-93cf-7a49476e841c/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_c5013309-fd47-4fa8-93cf-7a49476e841c/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_c5013309-fd47-4fa8-93cf-7a49476e841c/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-lit/ddlm2013.i -s /tmp/vcloud-vcloud-master/worker/working_dir_c5013309-fd47-4fa8-93cf-7a49476e841c/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_c5013309-fd47-4fa8-93cf-7a49476e841c/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 17744505b3a424a40a1b2449004fea58677c1b94 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-cad4683 [2019-10-22 09:00:40,451 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 09:00:40,453 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 09:00:40,464 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 09:00:40,464 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 09:00:40,465 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 09:00:40,466 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 09:00:40,468 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 09:00:40,469 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 09:00:40,470 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 09:00:40,472 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 09:00:40,473 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 09:00:40,473 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 09:00:40,474 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 09:00:40,474 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 09:00:40,475 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 09:00:40,475 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 09:00:40,476 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 09:00:40,477 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 09:00:40,485 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 09:00:40,486 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 09:00:40,487 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 09:00:40,488 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 09:00:40,488 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 09:00:40,490 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 09:00:40,493 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 09:00:40,493 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 09:00:40,494 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 09:00:40,494 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 09:00:40,495 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 09:00:40,495 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 09:00:40,495 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 09:00:40,496 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 09:00:40,496 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 09:00:40,497 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 09:00:40,497 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 09:00:40,498 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 09:00:40,500 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 09:00:40,500 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 09:00:40,501 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 09:00:40,501 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 09:00:40,502 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_c5013309-fd47-4fa8-93cf-7a49476e841c/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-22 09:00:40,525 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 09:00:40,525 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 09:00:40,526 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-22 09:00:40,527 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-22 09:00:40,527 INFO L138 SettingsManager]: * Use SBE=true [2019-10-22 09:00:40,527 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 09:00:40,527 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-22 09:00:40,527 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-22 09:00:40,527 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-22 09:00:40,528 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 09:00:40,528 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-22 09:00:40,528 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 09:00:40,528 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-22 09:00:40,528 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-22 09:00:40,528 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-22 09:00:40,529 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-22 09:00:40,529 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-22 09:00:40,529 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 09:00:40,529 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 09:00:40,529 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 09:00:40,529 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-22 09:00:40,530 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 09:00:40,530 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 09:00:40,530 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 09:00:40,530 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-22 09:00:40,530 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-22 09:00:40,530 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-22 09:00:40,531 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-22 09:00:40,531 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_c5013309-fd47-4fa8-93cf-7a49476e841c/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 -> 17744505b3a424a40a1b2449004fea58677c1b94 [2019-10-22 09:00:40,562 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 09:00:40,573 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 09:00:40,577 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 09:00:40,578 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 09:00:40,579 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 09:00:40,579 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_c5013309-fd47-4fa8-93cf-7a49476e841c/bin/uautomizer/../../sv-benchmarks/c/loop-lit/ddlm2013.i [2019-10-22 09:00:40,638 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_c5013309-fd47-4fa8-93cf-7a49476e841c/bin/uautomizer/data/ab51c19a1/d50f36a3ec3142dea6b1b9963e50ddde/FLAG9db6de9f0 [2019-10-22 09:00:41,020 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 09:00:41,021 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_c5013309-fd47-4fa8-93cf-7a49476e841c/sv-benchmarks/c/loop-lit/ddlm2013.i [2019-10-22 09:00:41,026 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_c5013309-fd47-4fa8-93cf-7a49476e841c/bin/uautomizer/data/ab51c19a1/d50f36a3ec3142dea6b1b9963e50ddde/FLAG9db6de9f0 [2019-10-22 09:00:41,035 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_c5013309-fd47-4fa8-93cf-7a49476e841c/bin/uautomizer/data/ab51c19a1/d50f36a3ec3142dea6b1b9963e50ddde [2019-10-22 09:00:41,037 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 09:00:41,038 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 09:00:41,041 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 09:00:41,041 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 09:00:41,044 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 09:00:41,045 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 09:00:41" (1/1) ... [2019-10-22 09:00:41,047 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2eaf3415 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:00:41, skipping insertion in model container [2019-10-22 09:00:41,047 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 09:00:41" (1/1) ... [2019-10-22 09:00:41,054 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 09:00:41,072 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 09:00:41,181 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 09:00:41,185 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 09:00:41,258 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 09:00:41,270 INFO L192 MainTranslator]: Completed translation [2019-10-22 09:00:41,270 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:00:41 WrapperNode [2019-10-22 09:00:41,270 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 09:00:41,271 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 09:00:41,271 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 09:00:41,271 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 09:00:41,280 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:00:41" (1/1) ... [2019-10-22 09:00:41,285 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:00:41" (1/1) ... [2019-10-22 09:00:41,305 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 09:00:41,305 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 09:00:41,305 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 09:00:41,305 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 09:00:41,314 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:00:41" (1/1) ... [2019-10-22 09:00:41,315 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:00:41" (1/1) ... [2019-10-22 09:00:41,315 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:00:41" (1/1) ... [2019-10-22 09:00:41,316 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:00:41" (1/1) ... [2019-10-22 09:00:41,318 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:00:41" (1/1) ... [2019-10-22 09:00:41,323 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:00:41" (1/1) ... [2019-10-22 09:00:41,324 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:00:41" (1/1) ... [2019-10-22 09:00:41,325 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 09:00:41,326 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 09:00:41,326 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 09:00:41,326 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 09:00:41,331 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:00:41" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c5013309-fd47-4fa8-93cf-7a49476e841c/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 09:00:41,387 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 09:00:41,387 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 09:00:41,583 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 09:00:41,583 INFO L284 CfgBuilder]: Removed 7 assume(true) statements. [2019-10-22 09:00:41,584 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 09:00:41 BoogieIcfgContainer [2019-10-22 09:00:41,584 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 09:00:41,585 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-22 09:00:41,585 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-22 09:00:41,589 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-22 09:00:41,589 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 09:00:41" (1/3) ... [2019-10-22 09:00:41,592 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c36d74a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 09:00:41, skipping insertion in model container [2019-10-22 09:00:41,592 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:00:41" (2/3) ... [2019-10-22 09:00:41,593 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c36d74a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 09:00:41, skipping insertion in model container [2019-10-22 09:00:41,593 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 09:00:41" (3/3) ... [2019-10-22 09:00:41,595 INFO L109 eAbstractionObserver]: Analyzing ICFG ddlm2013.i [2019-10-22 09:00:41,601 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-22 09:00:41,607 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-22 09:00:41,616 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-22 09:00:41,633 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-22 09:00:41,633 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-22 09:00:41,633 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-22 09:00:41,633 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 09:00:41,633 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 09:00:41,634 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-22 09:00:41,634 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 09:00:41,634 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-22 09:00:41,651 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2019-10-22 09:00:41,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-10-22 09:00:41,658 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:00:41,659 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-10-22 09:00:41,660 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:00:41,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:41,674 INFO L82 PathProgramCache]: Analyzing trace with hash 920569802, now seen corresponding path program 1 times [2019-10-22 09:00:41,683 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:00:41,683 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126535241] [2019-10-22 09:00:41,683 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:41,683 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:41,684 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:00:41,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:41,755 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 09:00:41,756 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126535241] [2019-10-22 09:00:41,757 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 09:00:41,757 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-22 09:00:41,757 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763929956] [2019-10-22 09:00:41,761 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-22 09:00:41,762 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:00:41,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-22 09:00:41,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-22 09:00:41,772 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 2 states. [2019-10-22 09:00:41,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:00:41,784 INFO L93 Difference]: Finished difference Result 21 states and 27 transitions. [2019-10-22 09:00:41,784 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-22 09:00:41,785 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2019-10-22 09:00:41,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:00:41,793 INFO L225 Difference]: With dead ends: 21 [2019-10-22 09:00:41,793 INFO L226 Difference]: Without dead ends: 9 [2019-10-22 09:00:41,795 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-22 09:00:41,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2019-10-22 09:00:41,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2019-10-22 09:00:41,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-10-22 09:00:41,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 11 transitions. [2019-10-22 09:00:41,825 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 11 transitions. Word has length 6 [2019-10-22 09:00:41,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:00:41,825 INFO L462 AbstractCegarLoop]: Abstraction has 9 states and 11 transitions. [2019-10-22 09:00:41,825 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-22 09:00:41,825 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 11 transitions. [2019-10-22 09:00:41,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-10-22 09:00:41,826 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:00:41,826 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:00:41,826 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:00:41,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:41,827 INFO L82 PathProgramCache]: Analyzing trace with hash -1539532969, now seen corresponding path program 1 times [2019-10-22 09:00:41,827 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:00:41,827 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627383736] [2019-10-22 09:00:41,827 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:41,827 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:41,828 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:00:41,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:42,118 WARN L191 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 16 [2019-10-22 09:00:42,133 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 09:00:42,133 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627383736] [2019-10-22 09:00:42,133 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 09:00:42,133 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-22 09:00:42,134 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608049191] [2019-10-22 09:00:42,135 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-22 09:00:42,135 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:00:42,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-22 09:00:42,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-22 09:00:42,136 INFO L87 Difference]: Start difference. First operand 9 states and 11 transitions. Second operand 4 states. [2019-10-22 09:00:42,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:00:42,176 INFO L93 Difference]: Finished difference Result 15 states and 17 transitions. [2019-10-22 09:00:42,176 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-22 09:00:42,176 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-10-22 09:00:42,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:00:42,177 INFO L225 Difference]: With dead ends: 15 [2019-10-22 09:00:42,177 INFO L226 Difference]: Without dead ends: 11 [2019-10-22 09:00:42,178 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-22 09:00:42,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2019-10-22 09:00:42,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2019-10-22 09:00:42,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-10-22 09:00:42,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2019-10-22 09:00:42,181 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 7 [2019-10-22 09:00:42,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:00:42,181 INFO L462 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2019-10-22 09:00:42,181 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-22 09:00:42,181 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2019-10-22 09:00:42,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-22 09:00:42,182 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:00:42,182 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:00:42,183 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:00:42,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:42,183 INFO L82 PathProgramCache]: Analyzing trace with hash -1067556335, now seen corresponding path program 1 times [2019-10-22 09:00:42,183 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:00:42,183 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335995370] [2019-10-22 09:00:42,184 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:42,184 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:42,184 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:00:42,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:44,420 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse5 (div c_ULTIMATE.start_main_~b~0 4294967296)) (.cse3 (div c_ULTIMATE.start_main_~a~0 4294967296))) (let ((.cse6 (* 4294967296 .cse3)) (.cse16 (* 4294967296 .cse5))) (let ((.cse2 (+ c_ULTIMATE.start_main_~a~0 .cse16)) (.cse1 (+ .cse6 c_ULTIMATE.start_main_~b~0))) (let ((.cse0 (= .cse2 .cse1))) (or .cse0 (let ((.cse4 (not .cse0))) (and (or (<= .cse1 .cse2) (and (or (and (or (<= .cse3 0) (<= c_ULTIMATE.start_main_~a~0 1)) (or (and .cse4 (<= 1 c_ULTIMATE.start_main_~b~0)) (and .cse0 (<= 0 c_ULTIMATE.start_main_~b~0)) (< 0 .cse3))) (<= .cse3 .cse5)) (or (and .cse0 (<= (+ c_ULTIMATE.start_main_~b~0 1) c_ULTIMATE.start_main_~a~0)) (and .cse4 (<= c_ULTIMATE.start_main_~b~0 c_ULTIMATE.start_main_~a~0)) (< .cse5 .cse3)))) .cse4 (let ((.cse20 (div c_ULTIMATE.start_main_~i~0 2))) (let ((.cse9 (* 2 .cse20))) (let ((.cse19 (* .cse20 (- 2))) (.cse18 (= .cse9 c_ULTIMATE.start_main_~i~0)) (.cse17 (* 4294967296 (div c_ULTIMATE.start_main_~i~0 4294967296)))) (let ((.cse7 (+ c_ULTIMATE.start_main_~a~0 .cse16 c_ULTIMATE.start_main_~i~0)) (.cse11 (< c_ULTIMATE.start_main_~i~0 .cse17)) (.cse12 (not .cse18)) (.cse13 (* 4294967296 (div (+ c_ULTIMATE.start_main_~i~0 .cse19 (- 2)) 4294967296))) (.cse8 (* 4294967296 (div (+ c_ULTIMATE.start_main_~i~0 .cse19) 4294967296))) (.cse10 (or (<= .cse17 c_ULTIMATE.start_main_~i~0) .cse18))) (or (< .cse2 .cse1) (< .cse2 (+ .cse6 c_ULTIMATE.start_main_~b~0 1)) (and (<= .cse7 (+ .cse6 c_ULTIMATE.start_main_~b~0 .cse8 .cse9)) .cse10) (and .cse11 .cse12 (<= .cse7 (+ .cse6 .cse13 c_ULTIMATE.start_main_~b~0 .cse9))) (let ((.cse14 (+ .cse3 1))) (and (let ((.cse15 (+ .cse16 c_ULTIMATE.start_main_~i~0))) (or (<= .cse14 0) (and .cse11 .cse12 (<= (+ .cse6 .cse13 c_ULTIMATE.start_main_~b~0 .cse9 1) .cse15)) (and (<= (+ .cse6 c_ULTIMATE.start_main_~b~0 .cse8 .cse9 1) .cse15) .cse10))) (or (< 0 .cse14) (<= 1 c_ULTIMATE.start_main_~a~0)))))))))))))))) is different from false [2019-10-22 09:00:46,449 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse5 (div c_ULTIMATE.start_main_~b~0 4294967296)) (.cse3 (div c_ULTIMATE.start_main_~a~0 4294967296))) (let ((.cse6 (* 4294967296 .cse3)) (.cse16 (* 4294967296 .cse5))) (let ((.cse2 (+ c_ULTIMATE.start_main_~a~0 .cse16)) (.cse1 (+ .cse6 c_ULTIMATE.start_main_~b~0))) (let ((.cse0 (= .cse2 .cse1))) (or .cse0 (let ((.cse4 (not .cse0))) (and (or (<= .cse1 .cse2) (and (or (and (or (<= .cse3 0) (<= c_ULTIMATE.start_main_~a~0 1)) (or (and .cse4 (<= 1 c_ULTIMATE.start_main_~b~0)) (and .cse0 (<= 0 c_ULTIMATE.start_main_~b~0)) (< 0 .cse3))) (<= .cse3 .cse5)) (or (and .cse0 (<= (+ c_ULTIMATE.start_main_~b~0 1) c_ULTIMATE.start_main_~a~0)) (and .cse4 (<= c_ULTIMATE.start_main_~b~0 c_ULTIMATE.start_main_~a~0)) (< .cse5 .cse3)))) .cse4 (let ((.cse20 (div c_ULTIMATE.start_main_~i~0 2))) (let ((.cse9 (* 2 .cse20))) (let ((.cse19 (* .cse20 (- 2))) (.cse18 (= .cse9 c_ULTIMATE.start_main_~i~0)) (.cse17 (* 4294967296 (div c_ULTIMATE.start_main_~i~0 4294967296)))) (let ((.cse7 (+ c_ULTIMATE.start_main_~a~0 .cse16 c_ULTIMATE.start_main_~i~0)) (.cse11 (< c_ULTIMATE.start_main_~i~0 .cse17)) (.cse12 (not .cse18)) (.cse13 (* 4294967296 (div (+ c_ULTIMATE.start_main_~i~0 .cse19 (- 2)) 4294967296))) (.cse8 (* 4294967296 (div (+ c_ULTIMATE.start_main_~i~0 .cse19) 4294967296))) (.cse10 (or (<= .cse17 c_ULTIMATE.start_main_~i~0) .cse18))) (or (< .cse2 .cse1) (< .cse2 (+ .cse6 c_ULTIMATE.start_main_~b~0 1)) (and (<= .cse7 (+ .cse6 c_ULTIMATE.start_main_~b~0 .cse8 .cse9)) .cse10) (and .cse11 .cse12 (<= .cse7 (+ .cse6 .cse13 c_ULTIMATE.start_main_~b~0 .cse9))) (let ((.cse14 (+ .cse3 1))) (and (let ((.cse15 (+ .cse16 c_ULTIMATE.start_main_~i~0))) (or (<= .cse14 0) (and .cse11 .cse12 (<= (+ .cse6 .cse13 c_ULTIMATE.start_main_~b~0 .cse9 1) .cse15)) (and (<= (+ .cse6 c_ULTIMATE.start_main_~b~0 .cse8 .cse9 1) .cse15) .cse10))) (or (< 0 .cse14) (<= 1 c_ULTIMATE.start_main_~a~0)))))))))))))))) is different from true [2019-10-22 09:00:46,501 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:00:46,501 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335995370] [2019-10-22 09:00:46,501 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516426232] [2019-10-22 09:00:46,501 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c5013309-fd47-4fa8-93cf-7a49476e841c/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 09:00:46,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:46,547 INFO L256 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-22 09:00:46,552 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:00:46,685 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:00:46,685 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:00:46,685 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2019-10-22 09:00:46,685 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816351573] [2019-10-22 09:00:46,686 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-22 09:00:46,686 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:00:46,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-22 09:00:46,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=64, Unknown=2, NotChecked=16, Total=110 [2019-10-22 09:00:46,687 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand 11 states. [2019-10-22 09:00:46,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:00:46,772 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2019-10-22 09:00:46,773 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-22 09:00:46,774 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2019-10-22 09:00:46,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:00:46,774 INFO L225 Difference]: With dead ends: 20 [2019-10-22 09:00:46,774 INFO L226 Difference]: Without dead ends: 16 [2019-10-22 09:00:46,775 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=34, Invalid=78, Unknown=2, NotChecked=18, Total=132 [2019-10-22 09:00:46,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-10-22 09:00:46,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 14. [2019-10-22 09:00:46,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-10-22 09:00:46,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2019-10-22 09:00:46,776 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 10 [2019-10-22 09:00:46,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:00:46,777 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2019-10-22 09:00:46,777 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-22 09:00:46,777 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2019-10-22 09:00:46,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-22 09:00:46,777 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:00:46,777 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:00:46,978 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:00:46,978 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:00:46,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:46,978 INFO L82 PathProgramCache]: Analyzing trace with hash -387497965, now seen corresponding path program 1 times [2019-10-22 09:00:46,979 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:00:46,979 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543045774] [2019-10-22 09:00:46,979 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:46,979 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:46,979 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:00:46,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:47,033 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-22 09:00:47,033 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543045774] [2019-10-22 09:00:47,033 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 09:00:47,033 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-22 09:00:47,034 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279756646] [2019-10-22 09:00:47,034 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-22 09:00:47,034 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:00:47,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-22 09:00:47,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-22 09:00:47,035 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand 3 states. [2019-10-22 09:00:47,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:00:47,049 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2019-10-22 09:00:47,050 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-22 09:00:47,050 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2019-10-22 09:00:47,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:00:47,051 INFO L225 Difference]: With dead ends: 23 [2019-10-22 09:00:47,051 INFO L226 Difference]: Without dead ends: 14 [2019-10-22 09:00:47,051 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-22 09:00:47,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-10-22 09:00:47,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-10-22 09:00:47,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-10-22 09:00:47,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2019-10-22 09:00:47,054 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 10 [2019-10-22 09:00:47,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:00:47,054 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2019-10-22 09:00:47,054 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-22 09:00:47,054 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2019-10-22 09:00:47,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-22 09:00:47,054 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:00:47,055 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2019-10-22 09:00:47,055 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:00:47,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:47,055 INFO L82 PathProgramCache]: Analyzing trace with hash -2134579945, now seen corresponding path program 2 times [2019-10-22 09:00:47,055 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:00:47,055 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808433975] [2019-10-22 09:00:47,056 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:47,056 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:47,056 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:00:47,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:49,497 WARN L191 SmtUtils]: Spent 2.11 s on a formula simplification. DAG size of input: 79 DAG size of output: 25 [2019-10-22 09:00:49,563 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:00:49,564 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808433975] [2019-10-22 09:00:49,564 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097881106] [2019-10-22 09:00:49,564 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c5013309-fd47-4fa8-93cf-7a49476e841c/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 09:00:49,592 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 09:00:49,592 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:00:49,593 INFO L256 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 26 conjunts are in the unsatisfiable core [2019-10-22 09:00:49,594 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:00:49,701 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:00:49,736 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:00:49,737 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:00:49,737 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2019-10-22 09:00:49,737 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181874203] [2019-10-22 09:00:49,737 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-22 09:00:49,738 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:00:49,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-22 09:00:49,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-10-22 09:00:49,740 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 11 states. [2019-10-22 09:00:49,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:00:49,861 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2019-10-22 09:00:49,861 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-22 09:00:49,861 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 13 [2019-10-22 09:00:49,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:00:49,862 INFO L225 Difference]: With dead ends: 28 [2019-10-22 09:00:49,862 INFO L226 Difference]: Without dead ends: 17 [2019-10-22 09:00:49,862 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2019-10-22 09:00:49,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-10-22 09:00:49,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-10-22 09:00:49,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-10-22 09:00:49,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2019-10-22 09:00:49,865 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 13 [2019-10-22 09:00:49,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:00:49,865 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2019-10-22 09:00:49,865 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-22 09:00:49,865 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2019-10-22 09:00:49,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-22 09:00:49,866 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:00:49,866 INFO L380 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1] [2019-10-22 09:00:50,068 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:00:50,069 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:00:50,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:50,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1512979537, now seen corresponding path program 3 times [2019-10-22 09:00:50,069 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:00:50,069 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653453786] [2019-10-22 09:00:50,070 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:50,070 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:50,070 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:00:50,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:50,460 WARN L191 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 24 [2019-10-22 09:00:50,657 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:00:50,658 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653453786] [2019-10-22 09:00:50,658 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014142151] [2019-10-22 09:00:50,658 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c5013309-fd47-4fa8-93cf-7a49476e841c/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 09:00:50,698 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-22 09:00:50,698 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:00:50,699 WARN L254 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 34 conjunts are in the unsatisfiable core [2019-10-22 09:00:50,701 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:00:50,903 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:00:50,904 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:00:50,904 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2019-10-22 09:00:50,904 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405372914] [2019-10-22 09:00:50,905 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-22 09:00:50,905 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:00:50,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-22 09:00:50,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2019-10-22 09:00:50,905 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 18 states. [2019-10-22 09:00:51,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:00:51,949 INFO L93 Difference]: Finished difference Result 45 states and 55 transitions. [2019-10-22 09:00:51,950 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-22 09:00:51,950 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 16 [2019-10-22 09:00:51,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:00:51,951 INFO L225 Difference]: With dead ends: 45 [2019-10-22 09:00:51,951 INFO L226 Difference]: Without dead ends: 28 [2019-10-22 09:00:51,951 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2019-10-22 09:00:51,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-10-22 09:00:51,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2019-10-22 09:00:51,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-22 09:00:51,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2019-10-22 09:00:51,954 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 16 [2019-10-22 09:00:51,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:00:51,955 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2019-10-22 09:00:51,955 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-22 09:00:51,955 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2019-10-22 09:00:51,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-22 09:00:51,955 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:00:51,955 INFO L380 BasicCegarLoop]: trace histogram [5, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:00:52,156 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:00:52,156 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:00:52,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:52,157 INFO L82 PathProgramCache]: Analyzing trace with hash -329989927, now seen corresponding path program 1 times [2019-10-22 09:00:52,157 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:00:52,157 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7037271] [2019-10-22 09:00:52,157 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:52,157 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:52,157 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:00:52,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:52,378 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:00:52,378 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7037271] [2019-10-22 09:00:52,378 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482166960] [2019-10-22 09:00:52,378 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c5013309-fd47-4fa8-93cf-7a49476e841c/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 09:00:52,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:52,408 INFO L256 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-22 09:00:52,408 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:00:52,433 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-22 09:00:52,433 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:00:52,433 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 9 [2019-10-22 09:00:52,433 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417557845] [2019-10-22 09:00:52,434 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-22 09:00:52,434 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:00:52,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-22 09:00:52,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2019-10-22 09:00:52,434 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 9 states. [2019-10-22 09:00:52,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:00:52,501 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2019-10-22 09:00:52,501 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-22 09:00:52,501 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 19 [2019-10-22 09:00:52,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:00:52,502 INFO L225 Difference]: With dead ends: 35 [2019-10-22 09:00:52,502 INFO L226 Difference]: Without dead ends: 26 [2019-10-22 09:00:52,502 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2019-10-22 09:00:52,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-10-22 09:00:52,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-10-22 09:00:52,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-22 09:00:52,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2019-10-22 09:00:52,508 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 19 [2019-10-22 09:00:52,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:00:52,508 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2019-10-22 09:00:52,508 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-22 09:00:52,508 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2019-10-22 09:00:52,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-22 09:00:52,509 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:00:52,509 INFO L380 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1] [2019-10-22 09:00:52,709 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:00:52,710 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:00:52,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:52,710 INFO L82 PathProgramCache]: Analyzing trace with hash 1603113111, now seen corresponding path program 4 times [2019-10-22 09:00:52,710 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:00:52,710 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135803132] [2019-10-22 09:00:52,710 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:52,710 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:52,710 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:00:52,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:54,943 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:00:54,944 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135803132] [2019-10-22 09:00:54,944 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227117991] [2019-10-22 09:00:54,944 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c5013309-fd47-4fa8-93cf-7a49476e841c/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 09:00:54,971 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-22 09:00:54,972 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:00:54,973 WARN L254 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 58 conjunts are in the unsatisfiable core [2019-10-22 09:00:54,974 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:00:55,831 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:00:55,831 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:00:55,831 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 29 [2019-10-22 09:00:55,831 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758903914] [2019-10-22 09:00:55,832 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-10-22 09:00:55,832 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:00:55,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-10-22 09:00:55,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=735, Unknown=0, NotChecked=0, Total=870 [2019-10-22 09:00:55,833 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 30 states. [2019-10-22 09:01:00,162 WARN L191 SmtUtils]: Spent 4.14 s on a formula simplification. DAG size of input: 64 DAG size of output: 40 [2019-10-22 09:01:04,546 WARN L191 SmtUtils]: Spent 4.34 s on a formula simplification. DAG size of input: 85 DAG size of output: 34 [2019-10-22 09:01:05,126 WARN L191 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 36 [2019-10-22 09:01:05,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:05,278 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2019-10-22 09:01:05,278 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-22 09:01:05,278 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 25 [2019-10-22 09:01:05,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:05,279 INFO L225 Difference]: With dead ends: 31 [2019-10-22 09:01:05,279 INFO L226 Difference]: Without dead ends: 0 [2019-10-22 09:01:05,279 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=206, Invalid=1054, Unknown=0, NotChecked=0, Total=1260 [2019-10-22 09:01:05,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-10-22 09:01:05,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-10-22 09:01:05,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-10-22 09:01:05,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-10-22 09:01:05,280 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 25 [2019-10-22 09:01:05,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:05,280 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-10-22 09:01:05,280 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-10-22 09:01:05,280 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-10-22 09:01:05,281 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-10-22 09:01:05,481 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:05,485 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-10-22 09:01:05,497 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-10-22 09:01:05,497 INFO L446 ceAbstractionStarter]: At program point L31(lines 31 33) the Hoare annotation is: true [2019-10-22 09:01:05,497 INFO L443 ceAbstractionStarter]: For program point L25(lines 25 29) no Hoare annotation was computed. [2019-10-22 09:01:05,497 INFO L443 ceAbstractionStarter]: For program point L25-2(lines 10 35) no Hoare annotation was computed. [2019-10-22 09:01:05,497 INFO L443 ceAbstractionStarter]: For program point L21(lines 21 30) no Hoare annotation was computed. [2019-10-22 09:01:05,497 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2019-10-22 09:01:05,498 INFO L443 ceAbstractionStarter]: For program point L21-2(lines 10 35) no Hoare annotation was computed. [2019-10-22 09:01:05,498 INFO L443 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2019-10-22 09:01:05,498 INFO L446 ceAbstractionStarter]: At program point L34(lines 10 35) the Hoare annotation is: true [2019-10-22 09:01:05,498 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-10-22 09:01:05,498 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-10-22 09:01:05,501 INFO L443 ceAbstractionStarter]: For program point L16(lines 16 20) no Hoare annotation was computed. [2019-10-22 09:01:05,501 INFO L443 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2019-10-22 09:01:05,507 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 09:01:05 BoogieIcfgContainer [2019-10-22 09:01:05,507 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-22 09:01:05,507 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-10-22 09:01:05,507 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-10-22 09:01:05,508 INFO L275 PluginConnector]: Witness Printer initialized [2019-10-22 09:01:05,508 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 09:00:41" (3/4) ... [2019-10-22 09:01:05,511 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-10-22 09:01:05,518 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2019-10-22 09:01:05,518 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-10-22 09:01:05,557 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_c5013309-fd47-4fa8-93cf-7a49476e841c/bin/uautomizer/witness.graphml [2019-10-22 09:01:05,558 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-10-22 09:01:05,559 INFO L168 Benchmark]: Toolchain (without parser) took 24520.53 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 207.1 MB). Free memory was 944.7 MB in the beginning and 919.8 MB in the end (delta: 24.9 MB). Peak memory consumption was 231.9 MB. Max. memory is 11.5 GB. [2019-10-22 09:01:05,559 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 966.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 09:01:05,560 INFO L168 Benchmark]: CACSL2BoogieTranslator took 229.49 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 149.9 MB). Free memory was 943.3 MB in the beginning and 1.1 GB in the end (delta: -206.4 MB). Peak memory consumption was 20.8 MB. Max. memory is 11.5 GB. [2019-10-22 09:01:05,562 INFO L168 Benchmark]: Boogie Procedure Inliner took 33.84 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 11.5 GB. [2019-10-22 09:01:05,563 INFO L168 Benchmark]: Boogie Preprocessor took 20.35 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 11.5 GB. [2019-10-22 09:01:05,563 INFO L168 Benchmark]: RCFGBuilder took 258.85 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 11.5 GB. [2019-10-22 09:01:05,564 INFO L168 Benchmark]: TraceAbstraction took 23921.82 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 57.1 MB). Free memory was 1.1 GB in the beginning and 926.8 MB in the end (delta: 198.6 MB). Peak memory consumption was 255.7 MB. Max. memory is 11.5 GB. [2019-10-22 09:01:05,564 INFO L168 Benchmark]: Witness Printer took 50.51 ms. Allocated memory is still 1.2 GB. Free memory was 926.8 MB in the beginning and 919.8 MB in the end (delta: 7.0 MB). Peak memory consumption was 7.0 MB. Max. memory is 11.5 GB. [2019-10-22 09:01:05,566 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 966.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 229.49 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 149.9 MB). Free memory was 943.3 MB in the beginning and 1.1 GB in the end (delta: -206.4 MB). Peak memory consumption was 20.8 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 33.84 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 20.35 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 258.85 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 11.5 GB. * TraceAbstraction took 23921.82 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 57.1 MB). Free memory was 1.1 GB in the beginning and 926.8 MB in the end (delta: 198.6 MB). Peak memory consumption was 255.7 MB. Max. memory is 11.5 GB. * Witness Printer took 50.51 ms. Allocated memory is still 1.2 GB. Free memory was 926.8 MB in the beginning and 919.8 MB in the end (delta: 7.0 MB). Peak memory consumption was 7.0 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 31]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 10]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 locations, 1 error locations. Result: SAFE, OverallTime: 23.8s, OverallIterations: 8, TraceHistogramMax: 7, AutomataDifference: 10.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 89 SDtfs, 74 SDslu, 329 SDs, 0 SdLazy, 475 SolverSat, 33 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 152 GetRequests, 56 SyntacticMatches, 6 SemanticMatches, 90 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 20.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=26occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 8 MinimizatonAttempts, 4 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 2 LocationsWithAnnotation, 2 PreInvPairs, 4 NumberOfFragments, 2 HoareAnnotationTreeSize, 2 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 2 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 11.3s InterpolantComputationTime, 189 NumberOfCodeBlocks, 189 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 176 ConstructedInterpolants, 4 QuantifiedInterpolants, 50653 SizeOfPredicates, 21 NumberOfNonLiveVariables, 342 ConjunctsInSsa, 145 ConjunctsInUnsatCore, 13 InterpolantComputations, 3 PerfectInterpolantSequences, 25/216 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...