./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/n.c11.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cad46833 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_5ef553bb-f061-4753-ab77-9b034a6b3dea/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_5ef553bb-f061-4753-ab77-9b034a6b3dea/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_5ef553bb-f061-4753-ab77-9b034a6b3dea/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_5ef553bb-f061-4753-ab77-9b034a6b3dea/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops/n.c11.c -s /tmp/vcloud-vcloud-master/worker/run_dir_5ef553bb-f061-4753-ab77-9b034a6b3dea/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_5ef553bb-f061-4753-ab77-9b034a6b3dea/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 f82cf7726c8201fc884c9fdb36548fce0440ab7f .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-cad4683 [2019-11-16 00:37:21,430 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-16 00:37:21,432 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-16 00:37:21,442 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-16 00:37:21,442 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-16 00:37:21,443 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-16 00:37:21,444 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-16 00:37:21,446 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-16 00:37:21,448 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-16 00:37:21,449 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-16 00:37:21,450 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-16 00:37:21,451 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-16 00:37:21,451 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-16 00:37:21,452 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-16 00:37:21,453 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-16 00:37:21,453 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-16 00:37:21,454 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-16 00:37:21,455 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-16 00:37:21,456 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-16 00:37:21,458 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-16 00:37:21,459 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-16 00:37:21,460 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-16 00:37:21,461 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-16 00:37:21,462 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-16 00:37:21,464 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-16 00:37:21,464 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-16 00:37:21,464 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-16 00:37:21,465 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-16 00:37:21,465 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-16 00:37:21,466 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-16 00:37:21,466 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-16 00:37:21,467 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-16 00:37:21,468 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-16 00:37:21,468 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-16 00:37:21,469 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-16 00:37:21,469 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-16 00:37:21,470 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-16 00:37:21,470 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-16 00:37:21,470 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-16 00:37:21,471 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-16 00:37:21,471 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-16 00:37:21,472 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_5ef553bb-f061-4753-ab77-9b034a6b3dea/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-16 00:37:21,484 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-16 00:37:21,484 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-16 00:37:21,486 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-16 00:37:21,486 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-16 00:37:21,486 INFO L138 SettingsManager]: * Use SBE=true [2019-11-16 00:37:21,486 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-16 00:37:21,487 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-16 00:37:21,487 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-16 00:37:21,487 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-16 00:37:21,487 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-16 00:37:21,487 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-16 00:37:21,488 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-16 00:37:21,488 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-16 00:37:21,488 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-16 00:37:21,488 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-16 00:37:21,488 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-16 00:37:21,489 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-16 00:37:21,489 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-16 00:37:21,489 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-16 00:37:21,489 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-16 00:37:21,490 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-16 00:37:21,490 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-16 00:37:21,490 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-16 00:37:21,490 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-16 00:37:21,490 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-16 00:37:21,491 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-16 00:37:21,491 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-16 00:37:21,491 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-16 00:37:21,491 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_5ef553bb-f061-4753-ab77-9b034a6b3dea/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 -> f82cf7726c8201fc884c9fdb36548fce0440ab7f [2019-11-16 00:37:21,517 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-16 00:37:21,526 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-16 00:37:21,529 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-16 00:37:21,530 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-16 00:37:21,531 INFO L275 PluginConnector]: CDTParser initialized [2019-11-16 00:37:21,531 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_5ef553bb-f061-4753-ab77-9b034a6b3dea/bin/uautomizer/../../sv-benchmarks/c/loops/n.c11.c [2019-11-16 00:37:21,583 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_5ef553bb-f061-4753-ab77-9b034a6b3dea/bin/uautomizer/data/34a38d9c3/7105d67058034784b31adc09e3436784/FLAGa8dd86446 [2019-11-16 00:37:21,995 INFO L306 CDTParser]: Found 1 translation units. [2019-11-16 00:37:21,996 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_5ef553bb-f061-4753-ab77-9b034a6b3dea/sv-benchmarks/c/loops/n.c11.c [2019-11-16 00:37:22,001 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_5ef553bb-f061-4753-ab77-9b034a6b3dea/bin/uautomizer/data/34a38d9c3/7105d67058034784b31adc09e3436784/FLAGa8dd86446 [2019-11-16 00:37:22,013 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_5ef553bb-f061-4753-ab77-9b034a6b3dea/bin/uautomizer/data/34a38d9c3/7105d67058034784b31adc09e3436784 [2019-11-16 00:37:22,015 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-16 00:37:22,017 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-16 00:37:22,018 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-16 00:37:22,018 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-16 00:37:22,021 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-16 00:37:22,022 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:37:22" (1/1) ... [2019-11-16 00:37:22,025 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e6d2bfc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:37:22, skipping insertion in model container [2019-11-16 00:37:22,025 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:37:22" (1/1) ... [2019-11-16 00:37:22,032 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-16 00:37:22,047 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-16 00:37:22,285 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-16 00:37:22,289 INFO L188 MainTranslator]: Completed pre-run [2019-11-16 00:37:22,307 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-16 00:37:22,321 INFO L192 MainTranslator]: Completed translation [2019-11-16 00:37:22,322 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:37:22 WrapperNode [2019-11-16 00:37:22,322 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-16 00:37:22,323 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-16 00:37:22,323 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-16 00:37:22,323 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-16 00:37:22,332 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:37:22" (1/1) ... [2019-11-16 00:37:22,337 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:37:22" (1/1) ... [2019-11-16 00:37:22,355 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-16 00:37:22,357 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-16 00:37:22,357 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-16 00:37:22,357 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-16 00:37:22,366 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:37:22" (1/1) ... [2019-11-16 00:37:22,366 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:37:22" (1/1) ... [2019-11-16 00:37:22,367 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:37:22" (1/1) ... [2019-11-16 00:37:22,367 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:37:22" (1/1) ... [2019-11-16 00:37:22,369 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:37:22" (1/1) ... [2019-11-16 00:37:22,374 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:37:22" (1/1) ... [2019-11-16 00:37:22,378 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:37:22" (1/1) ... [2019-11-16 00:37:22,379 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-16 00:37:22,380 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-16 00:37:22,380 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-16 00:37:22,380 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-16 00:37:22,381 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:37:22" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5ef553bb-f061-4753-ab77-9b034a6b3dea/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-16 00:37:22,449 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-16 00:37:22,450 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-16 00:37:22,617 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-16 00:37:22,617 INFO L284 CfgBuilder]: Removed 7 assume(true) statements. [2019-11-16 00:37:22,618 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:37:22 BoogieIcfgContainer [2019-11-16 00:37:22,619 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-16 00:37:22,619 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-16 00:37:22,620 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-16 00:37:22,622 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-16 00:37:22,623 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 12:37:22" (1/3) ... [2019-11-16 00:37:22,624 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1146e7f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:37:22, skipping insertion in model container [2019-11-16 00:37:22,624 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:37:22" (2/3) ... [2019-11-16 00:37:22,624 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1146e7f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:37:22, skipping insertion in model container [2019-11-16 00:37:22,624 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:37:22" (3/3) ... [2019-11-16 00:37:22,626 INFO L109 eAbstractionObserver]: Analyzing ICFG n.c11.c [2019-11-16 00:37:22,635 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-16 00:37:22,640 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-16 00:37:22,649 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-16 00:37:22,670 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-16 00:37:22,671 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-16 00:37:22,671 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-16 00:37:22,671 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-16 00:37:22,679 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-16 00:37:22,680 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-16 00:37:22,680 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-16 00:37:22,681 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-16 00:37:22,695 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2019-11-16 00:37:22,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-11-16 00:37:22,701 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:37:22,702 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-11-16 00:37:22,704 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:37:22,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:37:22,709 INFO L82 PathProgramCache]: Analyzing trace with hash 30139652, now seen corresponding path program 1 times [2019-11-16 00:37:22,717 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:37:22,718 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934643905] [2019-11-16 00:37:22,718 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:37:22,719 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:37:22,719 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:37:22,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:37:22,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:37:22,815 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934643905] [2019-11-16 00:37:22,816 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-16 00:37:22,817 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-16 00:37:22,817 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772922456] [2019-11-16 00:37:22,821 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-16 00:37:22,821 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:37:22,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-16 00:37:22,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-16 00:37:22,837 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 2 states. [2019-11-16 00:37:22,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:37:22,855 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2019-11-16 00:37:22,858 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-16 00:37:22,859 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 5 [2019-11-16 00:37:22,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:37:22,868 INFO L225 Difference]: With dead ends: 20 [2019-11-16 00:37:22,869 INFO L226 Difference]: Without dead ends: 8 [2019-11-16 00:37:22,872 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-16 00:37:22,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2019-11-16 00:37:22,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2019-11-16 00:37:22,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-11-16 00:37:22,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2019-11-16 00:37:22,907 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 5 [2019-11-16 00:37:22,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:37:22,908 INFO L462 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2019-11-16 00:37:22,908 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-16 00:37:22,908 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2019-11-16 00:37:22,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-11-16 00:37:22,909 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:37:22,909 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-11-16 00:37:22,909 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:37:22,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:37:22,910 INFO L82 PathProgramCache]: Analyzing trace with hash 29811951, now seen corresponding path program 1 times [2019-11-16 00:37:22,910 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:37:22,910 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382270655] [2019-11-16 00:37:22,911 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:37:22,911 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:37:22,911 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:37:22,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:37:23,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:37:23,017 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382270655] [2019-11-16 00:37:23,017 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-16 00:37:23,017 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-16 00:37:23,017 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076192226] [2019-11-16 00:37:23,018 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-16 00:37:23,019 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:37:23,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-16 00:37:23,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-16 00:37:23,019 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand 4 states. [2019-11-16 00:37:23,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:37:23,078 INFO L93 Difference]: Finished difference Result 20 states and 24 transitions. [2019-11-16 00:37:23,079 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-16 00:37:23,079 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2019-11-16 00:37:23,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:37:23,080 INFO L225 Difference]: With dead ends: 20 [2019-11-16 00:37:23,080 INFO L226 Difference]: Without dead ends: 11 [2019-11-16 00:37:23,081 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-16 00:37:23,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2019-11-16 00:37:23,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 10. [2019-11-16 00:37:23,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2019-11-16 00:37:23,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2019-11-16 00:37:23,084 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 5 [2019-11-16 00:37:23,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:37:23,084 INFO L462 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2019-11-16 00:37:23,084 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-16 00:37:23,084 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2019-11-16 00:37:23,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-16 00:37:23,085 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:37:23,085 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:37:23,085 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:37:23,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:37:23,085 INFO L82 PathProgramCache]: Analyzing trace with hash 665854491, now seen corresponding path program 1 times [2019-11-16 00:37:23,085 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:37:23,086 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096739671] [2019-11-16 00:37:23,086 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:37:23,086 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:37:23,086 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:37:23,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:37:23,188 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:37:23,188 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096739671] [2019-11-16 00:37:23,188 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121622607] [2019-11-16 00:37:23,189 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5ef553bb-f061-4753-ab77-9b034a6b3dea/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:37:23,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:37:23,224 WARN L254 TraceCheckSpWp]: Trace formula consists of 18 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-16 00:37:23,243 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:37:23,283 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:37:23,299 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:37:23,300 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:37:23,300 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2019-11-16 00:37:23,300 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278587983] [2019-11-16 00:37:23,301 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-16 00:37:23,301 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:37:23,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-16 00:37:23,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-11-16 00:37:23,301 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand 7 states. [2019-11-16 00:37:23,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:37:23,375 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2019-11-16 00:37:23,376 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-16 00:37:23,376 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 8 [2019-11-16 00:37:23,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:37:23,377 INFO L225 Difference]: With dead ends: 23 [2019-11-16 00:37:23,377 INFO L226 Difference]: Without dead ends: 14 [2019-11-16 00:37:23,377 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-16 00:37:23,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-11-16 00:37:23,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2019-11-16 00:37:23,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-11-16 00:37:23,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2019-11-16 00:37:23,381 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 8 [2019-11-16 00:37:23,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:37:23,381 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2019-11-16 00:37:23,381 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-16 00:37:23,382 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2019-11-16 00:37:23,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-16 00:37:23,382 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:37:23,382 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1] [2019-11-16 00:37:23,586 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:37:23,588 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:37:23,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:37:23,588 INFO L82 PathProgramCache]: Analyzing trace with hash -386546321, now seen corresponding path program 2 times [2019-11-16 00:37:23,588 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:37:23,589 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270571738] [2019-11-16 00:37:23,590 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:37:23,590 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:37:23,590 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:37:23,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:37:23,705 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:37:23,705 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270571738] [2019-11-16 00:37:23,705 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938770073] [2019-11-16 00:37:23,705 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5ef553bb-f061-4753-ab77-9b034a6b3dea/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:37:23,740 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-16 00:37:23,740 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-16 00:37:23,741 WARN L254 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-16 00:37:23,742 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:37:23,777 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:37:23,798 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:37:23,798 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:37:23,798 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2019-11-16 00:37:23,798 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520258849] [2019-11-16 00:37:23,799 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-16 00:37:23,799 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:37:23,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-16 00:37:23,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-16 00:37:23,800 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 8 states. [2019-11-16 00:37:23,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:37:23,886 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2019-11-16 00:37:23,886 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-16 00:37:23,886 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2019-11-16 00:37:23,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:37:23,887 INFO L225 Difference]: With dead ends: 29 [2019-11-16 00:37:23,887 INFO L226 Difference]: Without dead ends: 17 [2019-11-16 00:37:23,888 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2019-11-16 00:37:23,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-16 00:37:23,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2019-11-16 00:37:23,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-16 00:37:23,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2019-11-16 00:37:23,892 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 11 [2019-11-16 00:37:23,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:37:23,892 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2019-11-16 00:37:23,892 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-16 00:37:23,892 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2019-11-16 00:37:23,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-16 00:37:23,893 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:37:23,893 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1] [2019-11-16 00:37:24,097 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:37:24,097 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:37:24,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:37:24,097 INFO L82 PathProgramCache]: Analyzing trace with hash 802124187, now seen corresponding path program 3 times [2019-11-16 00:37:24,098 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:37:24,098 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556440585] [2019-11-16 00:37:24,098 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:37:24,098 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:37:24,098 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:37:24,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:37:24,234 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:37:24,234 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556440585] [2019-11-16 00:37:24,234 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987216700] [2019-11-16 00:37:24,234 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5ef553bb-f061-4753-ab77-9b034a6b3dea/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:37:24,279 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-16 00:37:24,280 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-16 00:37:24,281 WARN L254 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-16 00:37:24,282 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:37:24,320 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:37:24,340 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:37:24,340 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:37:24,340 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2019-11-16 00:37:24,340 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592328648] [2019-11-16 00:37:24,341 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-16 00:37:24,341 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:37:24,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-16 00:37:24,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2019-11-16 00:37:24,342 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 9 states. [2019-11-16 00:37:24,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:37:24,454 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2019-11-16 00:37:24,455 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-16 00:37:24,455 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2019-11-16 00:37:24,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:37:24,456 INFO L225 Difference]: With dead ends: 35 [2019-11-16 00:37:24,456 INFO L226 Difference]: Without dead ends: 20 [2019-11-16 00:37:24,456 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-11-16 00:37:24,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-16 00:37:24,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2019-11-16 00:37:24,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-16 00:37:24,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2019-11-16 00:37:24,460 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 14 [2019-11-16 00:37:24,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:37:24,460 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2019-11-16 00:37:24,460 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-16 00:37:24,461 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2019-11-16 00:37:24,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-16 00:37:24,461 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:37:24,461 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1] [2019-11-16 00:37:24,668 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:37:24,668 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:37:24,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:37:24,669 INFO L82 PathProgramCache]: Analyzing trace with hash 479872495, now seen corresponding path program 4 times [2019-11-16 00:37:24,669 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:37:24,669 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625715609] [2019-11-16 00:37:24,669 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:37:24,670 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:37:24,670 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:37:24,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:37:24,864 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:37:24,864 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625715609] [2019-11-16 00:37:24,865 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646046459] [2019-11-16 00:37:24,865 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5ef553bb-f061-4753-ab77-9b034a6b3dea/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:37:24,900 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-16 00:37:24,901 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-16 00:37:24,902 INFO L256 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-16 00:37:24,903 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:37:24,930 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:37:24,947 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:37:24,947 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:37:24,947 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2019-11-16 00:37:24,947 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380089861] [2019-11-16 00:37:24,948 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-16 00:37:24,948 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:37:24,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-16 00:37:24,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-11-16 00:37:24,948 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 10 states. [2019-11-16 00:37:25,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:37:25,022 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2019-11-16 00:37:25,023 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-16 00:37:25,023 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2019-11-16 00:37:25,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:37:25,024 INFO L225 Difference]: With dead ends: 33 [2019-11-16 00:37:25,024 INFO L226 Difference]: Without dead ends: 0 [2019-11-16 00:37:25,024 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2019-11-16 00:37:25,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-16 00:37:25,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-16 00:37:25,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-16 00:37:25,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-16 00:37:25,025 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 17 [2019-11-16 00:37:25,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:37:25,025 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-16 00:37:25,025 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-16 00:37:25,026 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-16 00:37:25,026 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-16 00:37:25,226 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:37:25,230 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-11-16 00:37:25,277 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-11-16 00:37:25,277 INFO L446 ceAbstractionStarter]: At program point L29(lines 12 32) the Hoare annotation is: true [2019-11-16 00:37:25,277 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2019-11-16 00:37:25,278 INFO L443 ceAbstractionStarter]: For program point L21(lines 21 22) no Hoare annotation was computed. [2019-11-16 00:37:25,278 INFO L443 ceAbstractionStarter]: For program point L21-2(lines 21 22) no Hoare annotation was computed. [2019-11-16 00:37:25,278 INFO L439 ceAbstractionStarter]: At program point L19-2(lines 19 27) the Hoare annotation is: (or (and (<= 3 ULTIMATE.start_main_~len~0) (<= ULTIMATE.start_main_~len~0 3)) (and (<= ULTIMATE.start_main_~len~0 4) (<= 4 ULTIMATE.start_main_~len~0)) (and (<= 1 ULTIMATE.start_main_~len~0) (<= ULTIMATE.start_main_~len~0 1)) (and (<= 2 ULTIMATE.start_main_~len~0) (<= ULTIMATE.start_main_~len~0 2)) (and (<= 0 ULTIMATE.start_main_~len~0) (<= ULTIMATE.start_main_~len~0 0))) [2019-11-16 00:37:25,278 INFO L443 ceAbstractionStarter]: For program point L19-3(lines 19 27) no Hoare annotation was computed. [2019-11-16 00:37:25,278 INFO L443 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2019-11-16 00:37:25,278 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-11-16 00:37:25,279 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-11-16 00:37:25,279 INFO L443 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2019-11-16 00:37:25,279 INFO L446 ceAbstractionStarter]: At program point L4-2(lines 3 8) the Hoare annotation is: true [2019-11-16 00:37:25,299 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.11 12:37:25 BoogieIcfgContainer [2019-11-16 00:37:25,299 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-16 00:37:25,302 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-16 00:37:25,302 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-16 00:37:25,302 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-16 00:37:25,303 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:37:22" (3/4) ... [2019-11-16 00:37:25,309 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-11-16 00:37:25,318 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2019-11-16 00:37:25,318 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-11-16 00:37:25,368 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_5ef553bb-f061-4753-ab77-9b034a6b3dea/bin/uautomizer/witness.graphml [2019-11-16 00:37:25,368 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-16 00:37:25,379 INFO L168 Benchmark]: Toolchain (without parser) took 3353.08 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 171.4 MB). Free memory was 950.1 MB in the beginning and 990.9 MB in the end (delta: -40.8 MB). Peak memory consumption was 130.6 MB. Max. memory is 11.5 GB. [2019-11-16 00:37:25,380 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-16 00:37:25,380 INFO L168 Benchmark]: CACSL2BoogieTranslator took 304.49 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 171.4 MB). Free memory was 950.1 MB in the beginning and 1.2 GB in the end (delta: -216.3 MB). Peak memory consumption was 22.9 MB. Max. memory is 11.5 GB. [2019-11-16 00:37:25,381 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.09 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. [2019-11-16 00:37:25,382 INFO L168 Benchmark]: Boogie Preprocessor took 22.52 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. [2019-11-16 00:37:25,382 INFO L168 Benchmark]: RCFGBuilder took 239.07 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 18.3 MB). Peak memory consumption was 18.3 MB. Max. memory is 11.5 GB. [2019-11-16 00:37:25,382 INFO L168 Benchmark]: TraceAbstraction took 2680.03 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 990.9 MB in the end (delta: 157.1 MB). Peak memory consumption was 157.1 MB. Max. memory is 11.5 GB. [2019-11-16 00:37:25,383 INFO L168 Benchmark]: Witness Printer took 66.54 ms. Allocated memory is still 1.2 GB. Free memory is still 990.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-16 00:37:25,384 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 304.49 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 171.4 MB). Free memory was 950.1 MB in the beginning and 1.2 GB in the end (delta: -216.3 MB). Peak memory consumption was 22.9 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 34.09 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 22.52 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 239.07 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 18.3 MB). Peak memory consumption was 18.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 2680.03 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 990.9 MB in the end (delta: 157.1 MB). Peak memory consumption was 157.1 MB. Max. memory is 11.5 GB. * Witness Printer took 66.54 ms. Allocated memory is still 1.2 GB. Free memory is still 990.9 MB. There was no memory consumed. 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: 19]: Loop Invariant Derived loop invariant: ((((3 <= len && len <= 3) || (len <= 4 && 4 <= len)) || (1 <= len && len <= 1)) || (2 <= len && len <= 2)) || (0 <= len && len <= 0) - InvariantResult [Line: 3]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 12]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. Result: SAFE, OverallTime: 2.6s, OverallIterations: 6, TraceHistogramMax: 4, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 50 SDtfs, 37 SDslu, 132 SDs, 0 SdLazy, 207 SolverSat, 20 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 78 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred in iteration=5, 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, 6 MinimizatonAttempts, 4 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 10 NumberOfFragments, 38 HoareAnnotationTreeSize, 3 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 110 NumberOfCodeBlocks, 110 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 100 ConstructedInterpolants, 0 QuantifiedInterpolants, 7622 SizeOfPredicates, 12 NumberOfNonLiveVariables, 102 ConjunctsInSsa, 53 ConjunctsInUnsatCore, 10 InterpolantComputations, 2 PerfectInterpolantSequences, 0/80 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...