./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive/Ackermann01_true-unreach-call_true-no-overflow.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0cd3be1d Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_c0fb7a7b-cef8-48c6-929b-12699f6ca024/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_c0fb7a7b-cef8-48c6-929b-12699f6ca024/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_c0fb7a7b-cef8-48c6-929b-12699f6ca024/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_c0fb7a7b-cef8-48c6-929b-12699f6ca024/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive/Ackermann01_true-unreach-call_true-no-overflow.c -s /tmp/vcloud-vcloud-master/worker/working_dir_c0fb7a7b-cef8-48c6-929b-12699f6ca024/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_c0fb7a7b-cef8-48c6-929b-12699f6ca024/bin-2019/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 c2f1e635c5c806286d01eb0b8ff07448b8253a7a ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-0cd3be1 [2018-11-28 10:33:37,452 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-28 10:33:37,453 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-28 10:33:37,460 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-28 10:33:37,461 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-28 10:33:37,461 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-28 10:33:37,462 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-28 10:33:37,463 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-28 10:33:37,464 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-28 10:33:37,465 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-28 10:33:37,465 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-28 10:33:37,465 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-28 10:33:37,466 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-28 10:33:37,466 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-28 10:33:37,467 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-28 10:33:37,467 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-28 10:33:37,468 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-28 10:33:37,469 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-28 10:33:37,470 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-28 10:33:37,471 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-28 10:33:37,471 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-28 10:33:37,472 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-28 10:33:37,474 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-28 10:33:37,474 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-28 10:33:37,474 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-28 10:33:37,475 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-28 10:33:37,475 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-28 10:33:37,476 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-28 10:33:37,476 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-28 10:33:37,477 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-28 10:33:37,477 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-28 10:33:37,477 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-28 10:33:37,478 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-28 10:33:37,478 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-28 10:33:37,478 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-28 10:33:37,479 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-28 10:33:37,479 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_c0fb7a7b-cef8-48c6-929b-12699f6ca024/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-11-28 10:33:37,489 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-28 10:33:37,489 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-28 10:33:37,490 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-28 10:33:37,490 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-11-28 10:33:37,491 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-28 10:33:37,491 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-28 10:33:37,491 INFO L133 SettingsManager]: * Use SBE=true [2018-11-28 10:33:37,491 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-28 10:33:37,492 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-28 10:33:37,492 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-28 10:33:37,492 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-28 10:33:37,492 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-28 10:33:37,492 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-28 10:33:37,492 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-28 10:33:37,492 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-28 10:33:37,493 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-28 10:33:37,493 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-28 10:33:37,493 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-28 10:33:37,493 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-28 10:33:37,493 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-28 10:33:37,493 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-28 10:33:37,493 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-28 10:33:37,494 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-28 10:33:37,494 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-28 10:33:37,494 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-28 10:33:37,494 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-28 10:33:37,494 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-28 10:33:37,494 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-28 10:33:37,495 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-28 10:33:37,495 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-28 10:33:37,495 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true 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_c0fb7a7b-cef8-48c6-929b-12699f6ca024/bin-2019/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 -> c2f1e635c5c806286d01eb0b8ff07448b8253a7a [2018-11-28 10:33:37,519 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-28 10:33:37,528 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-28 10:33:37,531 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-28 10:33:37,532 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-28 10:33:37,532 INFO L276 PluginConnector]: CDTParser initialized [2018-11-28 10:33:37,533 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_c0fb7a7b-cef8-48c6-929b-12699f6ca024/bin-2019/uautomizer/../../sv-benchmarks/c/recursive/Ackermann01_true-unreach-call_true-no-overflow.c [2018-11-28 10:33:37,580 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_c0fb7a7b-cef8-48c6-929b-12699f6ca024/bin-2019/uautomizer/data/43096c046/0453353eafb1467d803015b65a0e5049/FLAG569073cc5 [2018-11-28 10:33:37,880 INFO L307 CDTParser]: Found 1 translation units. [2018-11-28 10:33:37,880 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_c0fb7a7b-cef8-48c6-929b-12699f6ca024/sv-benchmarks/c/recursive/Ackermann01_true-unreach-call_true-no-overflow.c [2018-11-28 10:33:37,885 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_c0fb7a7b-cef8-48c6-929b-12699f6ca024/bin-2019/uautomizer/data/43096c046/0453353eafb1467d803015b65a0e5049/FLAG569073cc5 [2018-11-28 10:33:37,895 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_c0fb7a7b-cef8-48c6-929b-12699f6ca024/bin-2019/uautomizer/data/43096c046/0453353eafb1467d803015b65a0e5049 [2018-11-28 10:33:37,898 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-28 10:33:37,899 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-28 10:33:37,899 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-28 10:33:37,900 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-28 10:33:37,902 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-28 10:33:37,903 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 10:33:37" (1/1) ... [2018-11-28 10:33:37,905 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5274901a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 10:33:37, skipping insertion in model container [2018-11-28 10:33:37,905 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 10:33:37" (1/1) ... [2018-11-28 10:33:37,911 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-28 10:33:37,922 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-28 10:33:38,047 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 10:33:38,051 INFO L191 MainTranslator]: Completed pre-run [2018-11-28 10:33:38,061 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 10:33:38,069 INFO L195 MainTranslator]: Completed translation [2018-11-28 10:33:38,069 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 10:33:38 WrapperNode [2018-11-28 10:33:38,069 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-28 10:33:38,069 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-28 10:33:38,070 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-28 10:33:38,070 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-28 10:33:38,075 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 10:33:38" (1/1) ... [2018-11-28 10:33:38,079 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 10:33:38" (1/1) ... [2018-11-28 10:33:38,083 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-28 10:33:38,083 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-28 10:33:38,083 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-28 10:33:38,083 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-28 10:33:38,089 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 10:33:38" (1/1) ... [2018-11-28 10:33:38,089 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 10:33:38" (1/1) ... [2018-11-28 10:33:38,089 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 10:33:38" (1/1) ... [2018-11-28 10:33:38,090 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 10:33:38" (1/1) ... [2018-11-28 10:33:38,092 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 10:33:38" (1/1) ... [2018-11-28 10:33:38,094 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 10:33:38" (1/1) ... [2018-11-28 10:33:38,094 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 10:33:38" (1/1) ... [2018-11-28 10:33:38,095 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-28 10:33:38,096 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-28 10:33:38,096 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-28 10:33:38,096 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-28 10:33:38,096 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 10:33:38" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c0fb7a7b-cef8-48c6-929b-12699f6ca024/bin-2019/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 [2018-11-28 10:33:38,166 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-28 10:33:38,166 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-28 10:33:38,167 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-28 10:33:38,167 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-28 10:33:38,167 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2018-11-28 10:33:38,167 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2018-11-28 10:33:38,167 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-28 10:33:38,167 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-28 10:33:38,281 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-28 10:33:38,281 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-11-28 10:33:38,281 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 10:33:38 BoogieIcfgContainer [2018-11-28 10:33:38,281 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-28 10:33:38,282 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-28 10:33:38,282 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-28 10:33:38,283 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-28 10:33:38,284 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 10:33:37" (1/3) ... [2018-11-28 10:33:38,284 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fa8d40d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 10:33:38, skipping insertion in model container [2018-11-28 10:33:38,284 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 10:33:38" (2/3) ... [2018-11-28 10:33:38,284 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fa8d40d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 10:33:38, skipping insertion in model container [2018-11-28 10:33:38,284 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 10:33:38" (3/3) ... [2018-11-28 10:33:38,285 INFO L112 eAbstractionObserver]: Analyzing ICFG Ackermann01_true-unreach-call_true-no-overflow.c [2018-11-28 10:33:38,292 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-28 10:33:38,297 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-28 10:33:38,306 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-28 10:33:38,325 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-28 10:33:38,325 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-28 10:33:38,325 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-28 10:33:38,325 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-28 10:33:38,326 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-28 10:33:38,326 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-28 10:33:38,326 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-28 10:33:38,326 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-28 10:33:38,326 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-28 10:33:38,341 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2018-11-28 10:33:38,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-11-28 10:33:38,346 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 10:33:38,347 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 10:33:38,348 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 10:33:38,351 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 10:33:38,351 INFO L82 PathProgramCache]: Analyzing trace with hash -1796234678, now seen corresponding path program 1 times [2018-11-28 10:33:38,352 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 10:33:38,353 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 10:33:38,383 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 10:33:38,383 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 10:33:38,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 10:33:38,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 10:33:38,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 10:33:38,498 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 10:33:38,498 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-11-28 10:33:38,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-28 10:33:38,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-28 10:33:38,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-11-28 10:33:38,510 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 7 states. [2018-11-28 10:33:38,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 10:33:38,682 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2018-11-28 10:33:38,683 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-28 10:33:38,684 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2018-11-28 10:33:38,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 10:33:38,694 INFO L225 Difference]: With dead ends: 41 [2018-11-28 10:33:38,695 INFO L226 Difference]: Without dead ends: 25 [2018-11-28 10:33:38,697 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2018-11-28 10:33:38,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-11-28 10:33:38,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-11-28 10:33:38,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-11-28 10:33:38,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2018-11-28 10:33:38,723 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 15 [2018-11-28 10:33:38,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 10:33:38,724 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2018-11-28 10:33:38,724 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-28 10:33:38,724 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2018-11-28 10:33:38,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-11-28 10:33:38,725 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 10:33:38,725 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 10:33:38,726 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 10:33:38,726 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 10:33:38,726 INFO L82 PathProgramCache]: Analyzing trace with hash -895156504, now seen corresponding path program 1 times [2018-11-28 10:33:38,726 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 10:33:38,726 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 10:33:38,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 10:33:38,727 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 10:33:38,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 10:33:38,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 10:33:38,800 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-28 10:33:38,800 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 10:33:38,800 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c0fb7a7b-cef8-48c6-929b-12699f6ca024/bin-2019/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 10:33:38,812 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 10:33:38,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 10:33:38,829 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 10:33:38,846 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-28 10:33:38,863 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 10:33:38,863 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-11-28 10:33:38,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-28 10:33:38,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-28 10:33:38,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-11-28 10:33:38,864 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand 8 states. [2018-11-28 10:33:38,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 10:33:38,984 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2018-11-28 10:33:38,985 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-28 10:33:38,985 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2018-11-28 10:33:38,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 10:33:38,986 INFO L225 Difference]: With dead ends: 32 [2018-11-28 10:33:38,986 INFO L226 Difference]: Without dead ends: 28 [2018-11-28 10:33:38,987 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2018-11-28 10:33:38,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-11-28 10:33:38,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2018-11-28 10:33:38,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-11-28 10:33:38,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2018-11-28 10:33:38,994 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 22 [2018-11-28 10:33:38,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 10:33:38,994 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2018-11-28 10:33:38,994 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-28 10:33:38,994 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2018-11-28 10:33:38,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-11-28 10:33:38,995 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 10:33:38,996 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 10:33:38,996 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 10:33:38,996 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 10:33:38,996 INFO L82 PathProgramCache]: Analyzing trace with hash 408363011, now seen corresponding path program 1 times [2018-11-28 10:33:38,996 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 10:33:38,996 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 10:33:38,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 10:33:38,997 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 10:33:38,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 10:33:39,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 10:33:39,033 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-28 10:33:39,033 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 10:33:39,033 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c0fb7a7b-cef8-48c6-929b-12699f6ca024/bin-2019/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 10:33:39,042 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 10:33:39,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 10:33:39,052 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 10:33:39,099 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-11-28 10:33:39,122 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 10:33:39,122 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 10 [2018-11-28 10:33:39,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-28 10:33:39,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-28 10:33:39,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2018-11-28 10:33:39,123 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand 10 states. [2018-11-28 10:33:39,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 10:33:39,230 INFO L93 Difference]: Finished difference Result 51 states and 78 transitions. [2018-11-28 10:33:39,230 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-28 10:33:39,230 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2018-11-28 10:33:39,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 10:33:39,231 INFO L225 Difference]: With dead ends: 51 [2018-11-28 10:33:39,232 INFO L226 Difference]: Without dead ends: 33 [2018-11-28 10:33:39,232 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2018-11-28 10:33:39,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-11-28 10:33:39,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2018-11-28 10:33:39,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-11-28 10:33:39,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2018-11-28 10:33:39,240 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 28 [2018-11-28 10:33:39,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 10:33:39,240 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2018-11-28 10:33:39,240 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-28 10:33:39,240 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2018-11-28 10:33:39,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-11-28 10:33:39,242 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 10:33:39,243 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 10:33:39,243 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 10:33:39,243 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 10:33:39,243 INFO L82 PathProgramCache]: Analyzing trace with hash 718507263, now seen corresponding path program 1 times [2018-11-28 10:33:39,243 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 10:33:39,243 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 10:33:39,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 10:33:39,244 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 10:33:39,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 10:33:39,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 10:33:39,348 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-11-28 10:33:39,348 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 10:33:39,348 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c0fb7a7b-cef8-48c6-929b-12699f6ca024/bin-2019/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 10:33:39,360 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 10:33:39,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 10:33:39,380 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 10:33:39,395 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-11-28 10:33:39,410 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 10:33:39,410 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-11-28 10:33:39,411 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-28 10:33:39,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-28 10:33:39,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2018-11-28 10:33:39,411 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand 11 states. [2018-11-28 10:33:39,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 10:33:39,590 INFO L93 Difference]: Finished difference Result 42 states and 59 transitions. [2018-11-28 10:33:39,590 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-28 10:33:39,590 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 35 [2018-11-28 10:33:39,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 10:33:39,591 INFO L225 Difference]: With dead ends: 42 [2018-11-28 10:33:39,591 INFO L226 Difference]: Without dead ends: 38 [2018-11-28 10:33:39,592 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2018-11-28 10:33:39,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-11-28 10:33:39,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2018-11-28 10:33:39,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-11-28 10:33:39,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 53 transitions. [2018-11-28 10:33:39,598 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 53 transitions. Word has length 35 [2018-11-28 10:33:39,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 10:33:39,599 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 53 transitions. [2018-11-28 10:33:39,599 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-28 10:33:39,599 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 53 transitions. [2018-11-28 10:33:39,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-11-28 10:33:39,600 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 10:33:39,600 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 10:33:39,600 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 10:33:39,601 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 10:33:39,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1711672813, now seen corresponding path program 2 times [2018-11-28 10:33:39,601 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 10:33:39,601 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 10:33:39,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 10:33:39,602 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 10:33:39,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 10:33:39,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 10:33:39,693 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 11 proven. 12 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2018-11-28 10:33:39,693 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 10:33:39,693 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c0fb7a7b-cef8-48c6-929b-12699f6ca024/bin-2019/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 10:33:39,700 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 10:33:39,715 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 10:33:39,715 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 10:33:39,717 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 10:33:39,729 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 11 proven. 12 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2018-11-28 10:33:39,743 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 10:33:39,743 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-11-28 10:33:39,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-28 10:33:39,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-28 10:33:39,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2018-11-28 10:33:39,744 INFO L87 Difference]: Start difference. First operand 36 states and 53 transitions. Second operand 12 states. [2018-11-28 10:33:39,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 10:33:39,900 INFO L93 Difference]: Finished difference Result 49 states and 75 transitions. [2018-11-28 10:33:39,900 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-28 10:33:39,900 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 42 [2018-11-28 10:33:39,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 10:33:39,901 INFO L225 Difference]: With dead ends: 49 [2018-11-28 10:33:39,901 INFO L226 Difference]: Without dead ends: 45 [2018-11-28 10:33:39,901 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2018-11-28 10:33:39,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-11-28 10:33:39,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 34. [2018-11-28 10:33:39,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-11-28 10:33:39,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 47 transitions. [2018-11-28 10:33:39,906 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 47 transitions. Word has length 42 [2018-11-28 10:33:39,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 10:33:39,907 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 47 transitions. [2018-11-28 10:33:39,907 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-28 10:33:39,907 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 47 transitions. [2018-11-28 10:33:39,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-11-28 10:33:39,908 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 10:33:39,908 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 10:33:39,908 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 10:33:39,908 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 10:33:39,908 INFO L82 PathProgramCache]: Analyzing trace with hash -1051926487, now seen corresponding path program 3 times [2018-11-28 10:33:39,908 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 10:33:39,908 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 10:33:39,909 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 10:33:39,909 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 10:33:39,909 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 10:33:39,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 10:33:39,963 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 17 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2018-11-28 10:33:39,963 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 10:33:39,963 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c0fb7a7b-cef8-48c6-929b-12699f6ca024/bin-2019/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 10:33:39,975 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-28 10:33:39,985 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-11-28 10:33:39,985 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 10:33:39,987 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 10:33:39,995 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 17 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2018-11-28 10:33:40,010 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 10:33:40,010 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-11-28 10:33:40,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-28 10:33:40,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-28 10:33:40,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-11-28 10:33:40,011 INFO L87 Difference]: Start difference. First operand 34 states and 47 transitions. Second operand 9 states. [2018-11-28 10:33:40,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 10:33:40,084 INFO L93 Difference]: Finished difference Result 42 states and 58 transitions. [2018-11-28 10:33:40,085 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-28 10:33:40,085 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 42 [2018-11-28 10:33:40,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 10:33:40,086 INFO L225 Difference]: With dead ends: 42 [2018-11-28 10:33:40,086 INFO L226 Difference]: Without dead ends: 38 [2018-11-28 10:33:40,087 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2018-11-28 10:33:40,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-11-28 10:33:40,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-11-28 10:33:40,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-11-28 10:33:40,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 54 transitions. [2018-11-28 10:33:40,092 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 54 transitions. Word has length 42 [2018-11-28 10:33:40,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 10:33:40,092 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 54 transitions. [2018-11-28 10:33:40,092 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-28 10:33:40,093 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 54 transitions. [2018-11-28 10:33:40,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-11-28 10:33:40,094 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 10:33:40,094 INFO L402 BasicCegarLoop]: trace histogram [7, 7, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 10:33:40,094 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 10:33:40,095 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 10:33:40,095 INFO L82 PathProgramCache]: Analyzing trace with hash -1758821282, now seen corresponding path program 4 times [2018-11-28 10:33:40,095 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 10:33:40,095 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 10:33:40,096 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 10:33:40,096 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 10:33:40,096 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 10:33:40,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 10:33:40,147 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 32 proven. 23 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2018-11-28 10:33:40,147 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 10:33:40,148 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c0fb7a7b-cef8-48c6-929b-12699f6ca024/bin-2019/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 10:33:40,165 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-28 10:33:40,181 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-28 10:33:40,181 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 10:33:40,183 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 10:33:40,251 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 52 proven. 17 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2018-11-28 10:33:40,266 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 10:33:40,267 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2018-11-28 10:33:40,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-28 10:33:40,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-28 10:33:40,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2018-11-28 10:33:40,267 INFO L87 Difference]: Start difference. First operand 38 states and 54 transitions. Second operand 15 states. [2018-11-28 10:33:40,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 10:33:40,589 INFO L93 Difference]: Finished difference Result 96 states and 207 transitions. [2018-11-28 10:33:40,590 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-28 10:33:40,590 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 55 [2018-11-28 10:33:40,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 10:33:40,592 INFO L225 Difference]: With dead ends: 96 [2018-11-28 10:33:40,592 INFO L226 Difference]: Without dead ends: 66 [2018-11-28 10:33:40,593 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=541, Unknown=0, NotChecked=0, Total=702 [2018-11-28 10:33:40,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-11-28 10:33:40,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 63. [2018-11-28 10:33:40,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-11-28 10:33:40,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 111 transitions. [2018-11-28 10:33:40,607 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 111 transitions. Word has length 55 [2018-11-28 10:33:40,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 10:33:40,607 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 111 transitions. [2018-11-28 10:33:40,607 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-28 10:33:40,607 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 111 transitions. [2018-11-28 10:33:40,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-11-28 10:33:40,609 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 10:33:40,609 INFO L402 BasicCegarLoop]: trace histogram [10, 10, 6, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 10:33:40,609 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 10:33:40,609 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 10:33:40,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1483482771, now seen corresponding path program 5 times [2018-11-28 10:33:40,609 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 10:33:40,610 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 10:33:40,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 10:33:40,610 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 10:33:40,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 10:33:40,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 10:33:40,703 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 63 proven. 81 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2018-11-28 10:33:40,703 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 10:33:40,703 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c0fb7a7b-cef8-48c6-929b-12699f6ca024/bin-2019/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 10:33:40,719 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-28 10:33:40,757 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-11-28 10:33:40,757 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 10:33:40,760 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 10:33:40,889 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 97 proven. 37 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2018-11-28 10:33:40,904 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 10:33:40,905 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2018-11-28 10:33:40,905 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-28 10:33:40,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-28 10:33:40,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2018-11-28 10:33:40,905 INFO L87 Difference]: Start difference. First operand 63 states and 111 transitions. Second operand 20 states. [2018-11-28 10:33:41,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 10:33:41,266 INFO L93 Difference]: Finished difference Result 95 states and 181 transitions. [2018-11-28 10:33:41,267 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-11-28 10:33:41,267 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 75 [2018-11-28 10:33:41,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 10:33:41,267 INFO L225 Difference]: With dead ends: 95 [2018-11-28 10:33:41,268 INFO L226 Difference]: Without dead ends: 0 [2018-11-28 10:33:41,269 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=303, Invalid=1103, Unknown=0, NotChecked=0, Total=1406 [2018-11-28 10:33:41,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-28 10:33:41,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-28 10:33:41,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-28 10:33:41,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-28 10:33:41,269 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 75 [2018-11-28 10:33:41,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 10:33:41,270 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-28 10:33:41,270 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-28 10:33:41,270 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-28 10:33:41,270 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-28 10:33:41,273 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-28 10:33:41,482 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-11-28 10:33:41,482 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-28 10:33:41,482 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-28 10:33:41,482 INFO L451 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-28 10:33:41,482 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-28 10:33:41,482 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-28 10:33:41,482 INFO L448 ceAbstractionStarter]: For program point ackermannEXIT(lines 15 23) no Hoare annotation was computed. [2018-11-28 10:33:41,482 INFO L444 ceAbstractionStarter]: At program point L22(line 22) the Hoare annotation is: (and (= ackermann_~m |ackermann_#in~m|) (<= |ackermann_#in~n| ackermann_~n) (or (< |ackermann_#in~m| 0) (< 0 |ackermann_#in~m|))) [2018-11-28 10:33:41,482 INFO L451 ceAbstractionStarter]: At program point ackermannENTRY(lines 15 23) the Hoare annotation is: true [2018-11-28 10:33:41,482 INFO L448 ceAbstractionStarter]: For program point L22-1(line 22) no Hoare annotation was computed. [2018-11-28 10:33:41,482 INFO L444 ceAbstractionStarter]: At program point L20(line 20) the Hoare annotation is: (and (<= |ackermann_#in~n| 0) (= ackermann_~m |ackermann_#in~m|) (<= |ackermann_#in~n| ackermann_~n) (or (< |ackermann_#in~m| 0) (< 0 |ackermann_#in~m|))) [2018-11-28 10:33:41,483 INFO L444 ceAbstractionStarter]: At program point L22-2(line 22) the Hoare annotation is: (and (< 0 |ackermann_#in~m|) (let ((.cse0 (= ackermann_~m |ackermann_#in~m|)) (.cse1 (<= |ackermann_#in~n| ackermann_~n))) (or (and (<= 3 |ackermann_#t~ret1|) .cse0 .cse1) (and .cse0 .cse1 (<= |ackermann_#in~m| 1) (<= 2 |ackermann_#t~ret1|))))) [2018-11-28 10:33:41,483 INFO L448 ceAbstractionStarter]: For program point L19(lines 19 21) no Hoare annotation was computed. [2018-11-28 10:33:41,483 INFO L448 ceAbstractionStarter]: For program point L20-1(line 20) no Hoare annotation was computed. [2018-11-28 10:33:41,483 INFO L448 ceAbstractionStarter]: For program point L22-3(line 22) no Hoare annotation was computed. [2018-11-28 10:33:41,483 INFO L448 ceAbstractionStarter]: For program point L16(lines 16 18) no Hoare annotation was computed. [2018-11-28 10:33:41,483 INFO L448 ceAbstractionStarter]: For program point ackermannFINAL(lines 15 23) no Hoare annotation was computed. [2018-11-28 10:33:41,483 INFO L451 ceAbstractionStarter]: At program point mainENTRY(lines 26 46) the Hoare annotation is: true [2018-11-28 10:33:41,483 INFO L448 ceAbstractionStarter]: For program point L28(lines 28 32) no Hoare annotation was computed. [2018-11-28 10:33:41,483 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 26 46) no Hoare annotation was computed. [2018-11-28 10:33:41,483 INFO L448 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 44) no Hoare annotation was computed. [2018-11-28 10:33:41,483 INFO L448 ceAbstractionStarter]: For program point mainFINAL(lines 26 46) no Hoare annotation was computed. [2018-11-28 10:33:41,483 INFO L448 ceAbstractionStarter]: For program point L44(line 44) no Hoare annotation was computed. [2018-11-28 10:33:41,484 INFO L448 ceAbstractionStarter]: For program point L41(lines 41 45) no Hoare annotation was computed. [2018-11-28 10:33:41,484 INFO L444 ceAbstractionStarter]: At program point L40(line 40) the Hoare annotation is: (<= 0 main_~n~0) [2018-11-28 10:33:41,484 INFO L448 ceAbstractionStarter]: For program point L40-1(line 40) no Hoare annotation was computed. [2018-11-28 10:33:41,484 INFO L448 ceAbstractionStarter]: For program point L34(lines 34 39) no Hoare annotation was computed. [2018-11-28 10:33:41,487 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 10:33:41 BoogieIcfgContainer [2018-11-28 10:33:41,487 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-28 10:33:41,487 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-28 10:33:41,487 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-28 10:33:41,488 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-28 10:33:41,488 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 10:33:38" (3/4) ... [2018-11-28 10:33:41,491 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-28 10:33:41,497 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-28 10:33:41,498 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ackermann [2018-11-28 10:33:41,498 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-28 10:33:41,500 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-11-28 10:33:41,501 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2018-11-28 10:33:41,501 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-28 10:33:41,535 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_c0fb7a7b-cef8-48c6-929b-12699f6ca024/bin-2019/uautomizer/witness.graphml [2018-11-28 10:33:41,535 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-28 10:33:41,536 INFO L168 Benchmark]: Toolchain (without parser) took 3638.08 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 221.8 MB). Free memory was 952.2 MB in the beginning and 899.7 MB in the end (delta: 52.6 MB). Peak memory consumption was 274.3 MB. Max. memory is 11.5 GB. [2018-11-28 10:33:41,537 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 979.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 10:33:41,538 INFO L168 Benchmark]: CACSL2BoogieTranslator took 169.77 ms. Allocated memory is still 1.0 GB. Free memory was 952.2 MB in the beginning and 941.5 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 11.5 GB. [2018-11-28 10:33:41,538 INFO L168 Benchmark]: Boogie Procedure Inliner took 13.37 ms. Allocated memory is still 1.0 GB. Free memory is still 941.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 10:33:41,538 INFO L168 Benchmark]: Boogie Preprocessor took 12.54 ms. Allocated memory is still 1.0 GB. Free memory is still 941.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 10:33:41,538 INFO L168 Benchmark]: RCFGBuilder took 185.43 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 158.9 MB). Free memory was 941.5 MB in the beginning and 1.1 GB in the end (delta: -201.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 11.5 GB. [2018-11-28 10:33:41,539 INFO L168 Benchmark]: TraceAbstraction took 3205.54 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 62.9 MB). Free memory was 1.1 GB in the beginning and 904.6 MB in the end (delta: 238.6 MB). Peak memory consumption was 301.5 MB. Max. memory is 11.5 GB. [2018-11-28 10:33:41,539 INFO L168 Benchmark]: Witness Printer took 48.12 ms. Allocated memory is still 1.3 GB. Free memory was 904.6 MB in the beginning and 899.7 MB in the end (delta: 4.9 MB). Peak memory consumption was 4.9 MB. Max. memory is 11.5 GB. [2018-11-28 10:33:41,541 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 979.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 169.77 ms. Allocated memory is still 1.0 GB. Free memory was 952.2 MB in the beginning and 941.5 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 13.37 ms. Allocated memory is still 1.0 GB. Free memory is still 941.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 12.54 ms. Allocated memory is still 1.0 GB. Free memory is still 941.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 185.43 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 158.9 MB). Free memory was 941.5 MB in the beginning and 1.1 GB in the end (delta: -201.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 3205.54 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 62.9 MB). Free memory was 1.1 GB in the beginning and 904.6 MB in the end (delta: 238.6 MB). Peak memory consumption was 301.5 MB. Max. memory is 11.5 GB. * Witness Printer took 48.12 ms. Allocated memory is still 1.3 GB. Free memory was 904.6 MB in the beginning and 899.7 MB in the end (delta: 4.9 MB). Peak memory consumption was 4.9 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 44]: 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 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 27 locations, 1 error locations. SAFE Result, 3.1s OverallTime, 8 OverallIterations, 10 TraceHistogramMax, 1.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.2s HoareAnnotationTime, HoareTripleCheckerStatistics: 165 SDtfs, 203 SDslu, 850 SDs, 0 SdLazy, 1382 SolverSat, 274 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 444 GetRequests, 309 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 1.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=63occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 8 MinimizatonAttempts, 23 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 89 PreInvPairs, 110 NumberOfFragments, 72 HoareAnnotationTreeSize, 89 FomulaSimplifications, 555 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 9 FomulaSimplificationsInter, 432 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 613 NumberOfCodeBlocks, 566 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 598 ConstructedInterpolants, 0 QuantifiedInterpolants, 53344 SizeOfPredicates, 25 NumberOfNonLiveVariables, 746 ConjunctsInSsa, 81 ConjunctsInUnsatCore, 15 InterpolantComputations, 1 PerfectInterpolantSequences, 664/880 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...