./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive/Ackermann04.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f470102c Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_3f7d333c-6f2a-4326-9dcf-334f0bfa8035/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_3f7d333c-6f2a-4326-9dcf-334f0bfa8035/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_3f7d333c-6f2a-4326-9dcf-334f0bfa8035/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_3f7d333c-6f2a-4326-9dcf-334f0bfa8035/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive/Ackermann04.c -s /tmp/vcloud-vcloud-master/worker/run_dir_3f7d333c-6f2a-4326-9dcf-334f0bfa8035/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_3f7d333c-6f2a-4326-9dcf-334f0bfa8035/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 307542ef0214b83df72c59e51df6e57e6557ac8b ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-12-07 10:44:57,681 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 10:44:57,683 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 10:44:57,690 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 10:44:57,690 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 10:44:57,691 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 10:44:57,692 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 10:44:57,693 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 10:44:57,694 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 10:44:57,695 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 10:44:57,696 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 10:44:57,696 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 10:44:57,697 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 10:44:57,697 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 10:44:57,698 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 10:44:57,699 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 10:44:57,699 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 10:44:57,700 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 10:44:57,701 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 10:44:57,703 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 10:44:57,704 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 10:44:57,704 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 10:44:57,705 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 10:44:57,705 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 10:44:57,707 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 10:44:57,707 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 10:44:57,708 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 10:44:57,708 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 10:44:57,708 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 10:44:57,709 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 10:44:57,709 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 10:44:57,709 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 10:44:57,710 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 10:44:57,710 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 10:44:57,711 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 10:44:57,711 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 10:44:57,711 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 10:44:57,711 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 10:44:57,712 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 10:44:57,712 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 10:44:57,712 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 10:44:57,713 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_3f7d333c-6f2a-4326-9dcf-334f0bfa8035/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-12-07 10:44:57,722 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 10:44:57,723 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 10:44:57,723 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-07 10:44:57,723 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-07 10:44:57,724 INFO L138 SettingsManager]: * Use SBE=true [2019-12-07 10:44:57,724 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 10:44:57,724 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 10:44:57,724 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 10:44:57,724 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 10:44:57,724 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 10:44:57,724 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 10:44:57,724 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 10:44:57,725 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 10:44:57,725 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 10:44:57,725 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 10:44:57,725 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 10:44:57,725 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 10:44:57,725 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 10:44:57,725 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-07 10:44:57,725 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 10:44:57,726 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 10:44:57,726 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 10:44:57,726 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 10:44:57,726 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 10:44:57,726 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 10:44:57,726 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-07 10:44:57,726 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 10:44:57,726 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 10:44:57,727 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 10:44:57,727 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_3f7d333c-6f2a-4326-9dcf-334f0bfa8035/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 -> 307542ef0214b83df72c59e51df6e57e6557ac8b [2019-12-07 10:44:57,823 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 10:44:57,834 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 10:44:57,837 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 10:44:57,838 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 10:44:57,839 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 10:44:57,839 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_3f7d333c-6f2a-4326-9dcf-334f0bfa8035/bin/uautomizer/../../sv-benchmarks/c/recursive/Ackermann04.c [2019-12-07 10:44:57,883 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_3f7d333c-6f2a-4326-9dcf-334f0bfa8035/bin/uautomizer/data/0cbec28fd/e08d24da9109433e9a01d8436cac370f/FLAG1d3df859a [2019-12-07 10:44:58,309 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 10:44:58,309 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_3f7d333c-6f2a-4326-9dcf-334f0bfa8035/sv-benchmarks/c/recursive/Ackermann04.c [2019-12-07 10:44:58,313 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_3f7d333c-6f2a-4326-9dcf-334f0bfa8035/bin/uautomizer/data/0cbec28fd/e08d24da9109433e9a01d8436cac370f/FLAG1d3df859a [2019-12-07 10:44:58,321 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_3f7d333c-6f2a-4326-9dcf-334f0bfa8035/bin/uautomizer/data/0cbec28fd/e08d24da9109433e9a01d8436cac370f [2019-12-07 10:44:58,323 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 10:44:58,324 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 10:44:58,324 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 10:44:58,324 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 10:44:58,327 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 10:44:58,327 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 10:44:58" (1/1) ... [2019-12-07 10:44:58,329 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20cc73ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:44:58, skipping insertion in model container [2019-12-07 10:44:58,329 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 10:44:58" (1/1) ... [2019-12-07 10:44:58,334 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 10:44:58,346 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 10:44:58,450 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 10:44:58,487 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 10:44:58,499 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 10:44:58,508 INFO L208 MainTranslator]: Completed translation [2019-12-07 10:44:58,508 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:44:58 WrapperNode [2019-12-07 10:44:58,509 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 10:44:58,509 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 10:44:58,509 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 10:44:58,509 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 10:44:58,515 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:44:58" (1/1) ... [2019-12-07 10:44:58,519 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:44:58" (1/1) ... [2019-12-07 10:44:58,531 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 10:44:58,531 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 10:44:58,531 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 10:44:58,531 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 10:44:58,537 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:44:58" (1/1) ... [2019-12-07 10:44:58,537 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:44:58" (1/1) ... [2019-12-07 10:44:58,538 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:44:58" (1/1) ... [2019-12-07 10:44:58,538 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:44:58" (1/1) ... [2019-12-07 10:44:58,540 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:44:58" (1/1) ... [2019-12-07 10:44:58,542 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:44:58" (1/1) ... [2019-12-07 10:44:58,542 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:44:58" (1/1) ... [2019-12-07 10:44:58,544 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 10:44:58,544 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 10:44:58,544 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 10:44:58,544 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 10:44:58,545 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:44:58" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3f7d333c-6f2a-4326-9dcf-334f0bfa8035/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 [2019-12-07 10:44:58,583 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 10:44:58,583 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 10:44:58,583 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2019-12-07 10:44:58,583 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2019-12-07 10:44:58,687 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 10:44:58,688 INFO L287 CfgBuilder]: Removed 4 assume(true) statements. [2019-12-07 10:44:58,688 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 10:44:58 BoogieIcfgContainer [2019-12-07 10:44:58,689 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 10:44:58,689 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 10:44:58,689 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 10:44:58,691 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 10:44:58,691 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 10:44:58" (1/3) ... [2019-12-07 10:44:58,692 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5551f1e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 10:44:58, skipping insertion in model container [2019-12-07 10:44:58,692 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:44:58" (2/3) ... [2019-12-07 10:44:58,692 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5551f1e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 10:44:58, skipping insertion in model container [2019-12-07 10:44:58,692 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 10:44:58" (3/3) ... [2019-12-07 10:44:58,693 INFO L109 eAbstractionObserver]: Analyzing ICFG Ackermann04.c [2019-12-07 10:44:58,700 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 10:44:58,704 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-07 10:44:58,711 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-12-07 10:44:58,725 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 10:44:58,725 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 10:44:58,726 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 10:44:58,726 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 10:44:58,726 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 10:44:58,726 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 10:44:58,726 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 10:44:58,726 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 10:44:58,736 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2019-12-07 10:44:58,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-07 10:44:58,740 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 10:44:58,740 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 10:44:58,741 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 10:44:58,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 10:44:58,744 INFO L82 PathProgramCache]: Analyzing trace with hash -1260755674, now seen corresponding path program 1 times [2019-12-07 10:44:58,750 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 10:44:58,750 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281085520] [2019-12-07 10:44:58,750 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 10:44:58,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:44:58,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:44:58,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 10:44:58,875 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281085520] [2019-12-07 10:44:58,876 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 10:44:58,876 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-12-07 10:44:58,877 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388903464] [2019-12-07 10:44:58,880 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 10:44:58,880 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 10:44:58,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 10:44:58,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-12-07 10:44:58,890 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 5 states. [2019-12-07 10:44:58,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 10:44:58,967 INFO L93 Difference]: Finished difference Result 50 states and 71 transitions. [2019-12-07 10:44:58,967 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 10:44:58,968 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2019-12-07 10:44:58,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 10:44:58,974 INFO L225 Difference]: With dead ends: 50 [2019-12-07 10:44:58,974 INFO L226 Difference]: Without dead ends: 24 [2019-12-07 10:44:58,977 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-12-07 10:44:58,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-12-07 10:44:59,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-12-07 10:44:59,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-12-07 10:44:59,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2019-12-07 10:44:59,005 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 11 [2019-12-07 10:44:59,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 10:44:59,005 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2019-12-07 10:44:59,006 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 10:44:59,006 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2019-12-07 10:44:59,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-07 10:44:59,007 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 10:44:59,007 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 10:44:59,008 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 10:44:59,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 10:44:59,008 INFO L82 PathProgramCache]: Analyzing trace with hash 963920485, now seen corresponding path program 1 times [2019-12-07 10:44:59,008 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 10:44:59,008 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409304100] [2019-12-07 10:44:59,008 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 10:44:59,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:44:59,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:44:59,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:44:59,100 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 10:44:59,100 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409304100] [2019-12-07 10:44:59,100 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509287791] [2019-12-07 10:44:59,100 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3f7d333c-6f2a-4326-9dcf-334f0bfa8035/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 [2019-12-07 10:44:59,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:44:59,126 INFO L264 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-07 10:44:59,129 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 10:44:59,169 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 10:44:59,169 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 10:44:59,169 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-12-07 10:44:59,170 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734406950] [2019-12-07 10:44:59,171 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-07 10:44:59,171 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 10:44:59,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-07 10:44:59,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2019-12-07 10:44:59,172 INFO L87 Difference]: Start difference. First operand 24 states and 31 transitions. Second operand 11 states. [2019-12-07 10:44:59,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 10:44:59,309 INFO L93 Difference]: Finished difference Result 53 states and 82 transitions. [2019-12-07 10:44:59,310 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-07 10:44:59,310 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 18 [2019-12-07 10:44:59,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 10:44:59,311 INFO L225 Difference]: With dead ends: 53 [2019-12-07 10:44:59,311 INFO L226 Difference]: Without dead ends: 29 [2019-12-07 10:44:59,313 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2019-12-07 10:44:59,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-12-07 10:44:59,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2019-12-07 10:44:59,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-12-07 10:44:59,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 35 transitions. [2019-12-07 10:44:59,319 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 35 transitions. Word has length 18 [2019-12-07 10:44:59,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 10:44:59,319 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 35 transitions. [2019-12-07 10:44:59,319 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-07 10:44:59,319 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 35 transitions. [2019-12-07 10:44:59,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-12-07 10:44:59,321 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 10:44:59,321 INFO L410 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] [2019-12-07 10:44:59,521 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 10:44:59,521 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 10:44:59,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 10:44:59,522 INFO L82 PathProgramCache]: Analyzing trace with hash 416247163, now seen corresponding path program 1 times [2019-12-07 10:44:59,522 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 10:44:59,522 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250732256] [2019-12-07 10:44:59,522 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 10:44:59,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:44:59,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:44:59,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:44:59,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:44:59,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:44:59,640 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-12-07 10:44:59,640 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250732256] [2019-12-07 10:44:59,640 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983580942] [2019-12-07 10:44:59,641 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3f7d333c-6f2a-4326-9dcf-334f0bfa8035/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 [2019-12-07 10:44:59,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:44:59,666 INFO L264 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-07 10:44:59,668 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 10:44:59,710 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-12-07 10:44:59,710 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 10:44:59,710 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 14 [2019-12-07 10:44:59,711 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764519759] [2019-12-07 10:44:59,711 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-07 10:44:59,711 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 10:44:59,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-07 10:44:59,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2019-12-07 10:44:59,712 INFO L87 Difference]: Start difference. First operand 26 states and 35 transitions. Second operand 14 states. [2019-12-07 10:45:00,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 10:45:00,046 INFO L93 Difference]: Finished difference Result 83 states and 166 transitions. [2019-12-07 10:45:00,046 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-07 10:45:00,047 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 31 [2019-12-07 10:45:00,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 10:45:00,049 INFO L225 Difference]: With dead ends: 83 [2019-12-07 10:45:00,049 INFO L226 Difference]: Without dead ends: 57 [2019-12-07 10:45:00,051 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=385, Unknown=0, NotChecked=0, Total=506 [2019-12-07 10:45:00,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-12-07 10:45:00,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 49. [2019-12-07 10:45:00,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-12-07 10:45:00,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 75 transitions. [2019-12-07 10:45:00,064 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 75 transitions. Word has length 31 [2019-12-07 10:45:00,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 10:45:00,065 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 75 transitions. [2019-12-07 10:45:00,065 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-07 10:45:00,065 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 75 transitions. [2019-12-07 10:45:00,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-07 10:45:00,067 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 10:45:00,067 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 10:45:00,268 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 10:45:00,268 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 10:45:00,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 10:45:00,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1827824897, now seen corresponding path program 2 times [2019-12-07 10:45:00,269 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 10:45:00,269 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316857825] [2019-12-07 10:45:00,270 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 10:45:00,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:00,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:00,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:00,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:00,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:00,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:00,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:00,436 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-12-07 10:45:00,436 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316857825] [2019-12-07 10:45:00,436 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336077215] [2019-12-07 10:45:00,436 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3f7d333c-6f2a-4326-9dcf-334f0bfa8035/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 [2019-12-07 10:45:00,464 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 10:45:00,464 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 10:45:00,465 INFO L264 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-07 10:45:00,467 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 10:45:00,490 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-12-07 10:45:00,490 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 10:45:00,490 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2019-12-07 10:45:00,491 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974597493] [2019-12-07 10:45:00,491 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-07 10:45:00,491 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 10:45:00,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-07 10:45:00,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-12-07 10:45:00,492 INFO L87 Difference]: Start difference. First operand 49 states and 75 transitions. Second operand 9 states. [2019-12-07 10:45:00,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 10:45:00,570 INFO L93 Difference]: Finished difference Result 119 states and 226 transitions. [2019-12-07 10:45:00,570 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-07 10:45:00,570 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 44 [2019-12-07 10:45:00,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 10:45:00,572 INFO L225 Difference]: With dead ends: 119 [2019-12-07 10:45:00,572 INFO L226 Difference]: Without dead ends: 52 [2019-12-07 10:45:00,573 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2019-12-07 10:45:00,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-12-07 10:45:00,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2019-12-07 10:45:00,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-12-07 10:45:00,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 75 transitions. [2019-12-07 10:45:00,581 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 75 transitions. Word has length 44 [2019-12-07 10:45:00,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 10:45:00,582 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 75 transitions. [2019-12-07 10:45:00,582 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-07 10:45:00,582 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 75 transitions. [2019-12-07 10:45:00,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-12-07 10:45:00,584 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 10:45:00,584 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 7, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 10:45:00,785 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 10:45:00,786 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 10:45:00,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 10:45:00,786 INFO L82 PathProgramCache]: Analyzing trace with hash -1207723706, now seen corresponding path program 3 times [2019-12-07 10:45:00,787 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 10:45:00,787 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6747750] [2019-12-07 10:45:00,787 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 10:45:00,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:00,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:00,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:00,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:00,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:00,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:00,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:01,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:01,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:01,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:01,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:01,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:01,061 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 101 proven. 59 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2019-12-07 10:45:01,062 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6747750] [2019-12-07 10:45:01,062 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066628022] [2019-12-07 10:45:01,062 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3f7d333c-6f2a-4326-9dcf-334f0bfa8035/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 [2019-12-07 10:45:01,096 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-12-07 10:45:01,097 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 10:45:01,097 INFO L264 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-07 10:45:01,100 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 10:45:01,140 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 98 proven. 19 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2019-12-07 10:45:01,140 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 10:45:01,140 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9] total 18 [2019-12-07 10:45:01,141 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451952771] [2019-12-07 10:45:01,141 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-07 10:45:01,142 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 10:45:01,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-07 10:45:01,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2019-12-07 10:45:01,142 INFO L87 Difference]: Start difference. First operand 52 states and 75 transitions. Second operand 18 states. [2019-12-07 10:45:01,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 10:45:01,458 INFO L93 Difference]: Finished difference Result 118 states and 221 transitions. [2019-12-07 10:45:01,458 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-07 10:45:01,458 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 78 [2019-12-07 10:45:01,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 10:45:01,461 INFO L225 Difference]: With dead ends: 118 [2019-12-07 10:45:01,461 INFO L226 Difference]: Without dead ends: 70 [2019-12-07 10:45:01,462 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=261, Invalid=999, Unknown=0, NotChecked=0, Total=1260 [2019-12-07 10:45:01,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-12-07 10:45:01,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 52. [2019-12-07 10:45:01,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-12-07 10:45:01,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 71 transitions. [2019-12-07 10:45:01,471 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 71 transitions. Word has length 78 [2019-12-07 10:45:01,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 10:45:01,471 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 71 transitions. [2019-12-07 10:45:01,471 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-07 10:45:01,471 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 71 transitions. [2019-12-07 10:45:01,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2019-12-07 10:45:01,477 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 10:45:01,477 INFO L410 BasicCegarLoop]: trace histogram [23, 23, 14, 9, 8, 8, 8, 8, 8, 8, 8, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 10:45:01,677 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 10:45:01,678 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 10:45:01,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 10:45:01,679 INFO L82 PathProgramCache]: Analyzing trace with hash -554167378, now seen corresponding path program 4 times [2019-12-07 10:45:01,679 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 10:45:01,679 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876514976] [2019-12-07 10:45:01,679 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 10:45:01,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:01,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:01,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:01,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:01,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:01,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:01,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:01,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:01,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:01,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:01,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:01,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:01,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:02,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:02,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:02,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:02,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:02,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:02,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:02,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:02,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:02,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:02,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:02,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:02,164 INFO L134 CoverageAnalysis]: Checked inductivity of 1245 backedges. 364 proven. 420 refuted. 0 times theorem prover too weak. 461 trivial. 0 not checked. [2019-12-07 10:45:02,164 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876514976] [2019-12-07 10:45:02,165 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17310423] [2019-12-07 10:45:02,165 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3f7d333c-6f2a-4326-9dcf-334f0bfa8035/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 10:45:02,212 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 10:45:02,212 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 10:45:02,214 INFO L264 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 24 conjunts are in the unsatisfiable core [2019-12-07 10:45:02,220 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 10:45:02,392 INFO L134 CoverageAnalysis]: Checked inductivity of 1245 backedges. 268 proven. 468 refuted. 0 times theorem prover too weak. 509 trivial. 0 not checked. [2019-12-07 10:45:02,393 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 10:45:02,393 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 11] total 30 [2019-12-07 10:45:02,393 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320795466] [2019-12-07 10:45:02,394 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-12-07 10:45:02,394 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 10:45:02,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-12-07 10:45:02,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=784, Unknown=0, NotChecked=0, Total=870 [2019-12-07 10:45:02,394 INFO L87 Difference]: Start difference. First operand 52 states and 71 transitions. Second operand 30 states. [2019-12-07 10:45:04,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 10:45:04,811 INFO L93 Difference]: Finished difference Result 183 states and 444 transitions. [2019-12-07 10:45:04,812 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2019-12-07 10:45:04,812 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 157 [2019-12-07 10:45:04,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 10:45:04,814 INFO L225 Difference]: With dead ends: 183 [2019-12-07 10:45:04,814 INFO L226 Difference]: Without dead ends: 122 [2019-12-07 10:45:04,818 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2752 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1848, Invalid=8658, Unknown=0, NotChecked=0, Total=10506 [2019-12-07 10:45:04,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2019-12-07 10:45:04,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 101. [2019-12-07 10:45:04,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-12-07 10:45:04,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 156 transitions. [2019-12-07 10:45:04,833 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 156 transitions. Word has length 157 [2019-12-07 10:45:04,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 10:45:04,834 INFO L462 AbstractCegarLoop]: Abstraction has 101 states and 156 transitions. [2019-12-07 10:45:04,834 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-12-07 10:45:04,834 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 156 transitions. [2019-12-07 10:45:04,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-12-07 10:45:04,835 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 10:45:04,835 INFO L410 BasicCegarLoop]: trace histogram [19, 19, 11, 8, 7, 7, 7, 7, 7, 7, 7, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 10:45:05,035 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 10:45:05,036 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 10:45:05,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 10:45:05,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1646083662, now seen corresponding path program 5 times [2019-12-07 10:45:05,037 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 10:45:05,037 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301791771] [2019-12-07 10:45:05,037 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 10:45:05,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:05,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:05,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:05,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:05,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:05,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:05,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:05,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:05,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:05,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:05,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:05,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:05,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:05,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:05,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:05,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:05,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:05,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:05,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:05,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:05,289 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 240 proven. 264 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2019-12-07 10:45:05,289 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301791771] [2019-12-07 10:45:05,289 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221464987] [2019-12-07 10:45:05,289 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3f7d333c-6f2a-4326-9dcf-334f0bfa8035/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 10:45:05,336 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2019-12-07 10:45:05,336 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 10:45:05,337 INFO L264 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 21 conjunts are in the unsatisfiable core [2019-12-07 10:45:05,342 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 10:45:05,401 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 475 proven. 114 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2019-12-07 10:45:05,402 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 10:45:05,402 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 19 [2019-12-07 10:45:05,402 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785502270] [2019-12-07 10:45:05,402 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-12-07 10:45:05,402 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 10:45:05,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-12-07 10:45:05,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2019-12-07 10:45:05,403 INFO L87 Difference]: Start difference. First operand 101 states and 156 transitions. Second operand 19 states. [2019-12-07 10:45:05,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 10:45:05,852 INFO L93 Difference]: Finished difference Result 223 states and 395 transitions. [2019-12-07 10:45:05,852 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-12-07 10:45:05,852 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 130 [2019-12-07 10:45:05,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 10:45:05,854 INFO L225 Difference]: With dead ends: 223 [2019-12-07 10:45:05,855 INFO L226 Difference]: Without dead ends: 121 [2019-12-07 10:45:05,856 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=364, Invalid=1528, Unknown=0, NotChecked=0, Total=1892 [2019-12-07 10:45:05,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2019-12-07 10:45:05,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 107. [2019-12-07 10:45:05,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2019-12-07 10:45:05,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 163 transitions. [2019-12-07 10:45:05,872 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 163 transitions. Word has length 130 [2019-12-07 10:45:05,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 10:45:05,873 INFO L462 AbstractCegarLoop]: Abstraction has 107 states and 163 transitions. [2019-12-07 10:45:05,873 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-12-07 10:45:05,873 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 163 transitions. [2019-12-07 10:45:05,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2019-12-07 10:45:05,875 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 10:45:05,875 INFO L410 BasicCegarLoop]: trace histogram [23, 23, 13, 10, 9, 9, 9, 9, 9, 9, 9, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 10:45:06,075 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 10:45:06,076 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 10:45:06,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 10:45:06,076 INFO L82 PathProgramCache]: Analyzing trace with hash -437561620, now seen corresponding path program 6 times [2019-12-07 10:45:06,076 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 10:45:06,077 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655068136] [2019-12-07 10:45:06,077 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 10:45:06,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:06,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:06,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:06,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:06,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:06,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:06,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:06,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:06,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:06,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:06,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:06,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:06,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:06,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:06,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:06,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:06,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:06,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:06,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:06,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:06,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:06,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:06,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:06,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:06,420 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 446 proven. 274 refuted. 0 times theorem prover too weak. 526 trivial. 0 not checked. [2019-12-07 10:45:06,420 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655068136] [2019-12-07 10:45:06,421 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062227247] [2019-12-07 10:45:06,421 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3f7d333c-6f2a-4326-9dcf-334f0bfa8035/bin/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 10:45:06,485 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2019-12-07 10:45:06,485 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 10:45:06,486 INFO L264 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 35 conjunts are in the unsatisfiable core [2019-12-07 10:45:06,490 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 10:45:06,559 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 421 proven. 286 refuted. 0 times theorem prover too weak. 539 trivial. 0 not checked. [2019-12-07 10:45:06,560 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 10:45:06,560 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 24 [2019-12-07 10:45:06,560 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154064393] [2019-12-07 10:45:06,561 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-12-07 10:45:06,561 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 10:45:06,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-12-07 10:45:06,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2019-12-07 10:45:06,561 INFO L87 Difference]: Start difference. First operand 107 states and 163 transitions. Second operand 24 states. [2019-12-07 10:45:07,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 10:45:07,130 INFO L93 Difference]: Finished difference Result 244 states and 432 transitions. [2019-12-07 10:45:07,130 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-12-07 10:45:07,130 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 156 [2019-12-07 10:45:07,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 10:45:07,132 INFO L225 Difference]: With dead ends: 244 [2019-12-07 10:45:07,132 INFO L226 Difference]: Without dead ends: 145 [2019-12-07 10:45:07,134 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 684 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=543, Invalid=2649, Unknown=0, NotChecked=0, Total=3192 [2019-12-07 10:45:07,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2019-12-07 10:45:07,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 127. [2019-12-07 10:45:07,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2019-12-07 10:45:07,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 205 transitions. [2019-12-07 10:45:07,147 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 205 transitions. Word has length 156 [2019-12-07 10:45:07,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 10:45:07,148 INFO L462 AbstractCegarLoop]: Abstraction has 127 states and 205 transitions. [2019-12-07 10:45:07,148 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-12-07 10:45:07,148 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 205 transitions. [2019-12-07 10:45:07,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2019-12-07 10:45:07,149 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 10:45:07,149 INFO L410 BasicCegarLoop]: trace histogram [25, 25, 14, 11, 10, 10, 10, 10, 10, 10, 10, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 10:45:07,349 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 10:45:07,350 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 10:45:07,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 10:45:07,350 INFO L82 PathProgramCache]: Analyzing trace with hash -1768194034, now seen corresponding path program 7 times [2019-12-07 10:45:07,350 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 10:45:07,350 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474898836] [2019-12-07 10:45:07,350 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 10:45:07,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:07,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:07,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:07,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:07,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:07,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:07,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:07,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:07,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:07,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:07,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:07,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:07,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:07,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:07,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:07,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:07,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:07,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:07,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:07,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:07,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:07,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:07,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:07,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:07,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:07,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:07,696 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 503 proven. 360 refuted. 0 times theorem prover too weak. 620 trivial. 0 not checked. [2019-12-07 10:45:07,696 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474898836] [2019-12-07 10:45:07,697 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635157751] [2019-12-07 10:45:07,697 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3f7d333c-6f2a-4326-9dcf-334f0bfa8035/bin/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 10:45:07,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:07,761 INFO L264 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 37 conjunts are in the unsatisfiable core [2019-12-07 10:45:07,763 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 10:45:07,835 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 477 proven. 372 refuted. 0 times theorem prover too weak. 634 trivial. 0 not checked. [2019-12-07 10:45:07,836 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 10:45:07,836 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 25 [2019-12-07 10:45:07,836 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244993079] [2019-12-07 10:45:07,837 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-12-07 10:45:07,837 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 10:45:07,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-12-07 10:45:07,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2019-12-07 10:45:07,837 INFO L87 Difference]: Start difference. First operand 127 states and 205 transitions. Second operand 25 states. [2019-12-07 10:45:08,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 10:45:08,484 INFO L93 Difference]: Finished difference Result 288 states and 541 transitions. [2019-12-07 10:45:08,484 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-12-07 10:45:08,485 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 169 [2019-12-07 10:45:08,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 10:45:08,488 INFO L225 Difference]: With dead ends: 288 [2019-12-07 10:45:08,489 INFO L226 Difference]: Without dead ends: 169 [2019-12-07 10:45:08,491 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 221 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 896 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=670, Invalid=3236, Unknown=0, NotChecked=0, Total=3906 [2019-12-07 10:45:08,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2019-12-07 10:45:08,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 142. [2019-12-07 10:45:08,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2019-12-07 10:45:08,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 238 transitions. [2019-12-07 10:45:08,508 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 238 transitions. Word has length 169 [2019-12-07 10:45:08,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 10:45:08,508 INFO L462 AbstractCegarLoop]: Abstraction has 142 states and 238 transitions. [2019-12-07 10:45:08,509 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-12-07 10:45:08,509 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 238 transitions. [2019-12-07 10:45:08,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2019-12-07 10:45:08,511 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 10:45:08,511 INFO L410 BasicCegarLoop]: trace histogram [27, 27, 15, 12, 11, 11, 11, 11, 11, 11, 11, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 10:45:08,711 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 10:45:08,712 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 10:45:08,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 10:45:08,712 INFO L82 PathProgramCache]: Analyzing trace with hash -728546296, now seen corresponding path program 8 times [2019-12-07 10:45:08,712 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 10:45:08,712 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744437801] [2019-12-07 10:45:08,712 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 10:45:08,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:08,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:08,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:08,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:08,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:08,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:08,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:08,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:08,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:08,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:08,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:08,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:08,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:08,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:08,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:08,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:08,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:08,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:08,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:08,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:08,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:08,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:08,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:08,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:09,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:09,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:09,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:09,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:45:09,058 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 686 proven. 70 refuted. 0 times theorem prover too weak. 985 trivial. 0 not checked. [2019-12-07 10:45:09,059 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744437801] [2019-12-07 10:45:09,059 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963953798] [2019-12-07 10:45:09,059 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3f7d333c-6f2a-4326-9dcf-334f0bfa8035/bin/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 10:45:09,119 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 10:45:09,119 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 10:45:09,121 INFO L264 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 40 conjunts are in the unsatisfiable core [2019-12-07 10:45:09,123 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 10:45:09,162 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 657 proven. 84 refuted. 0 times theorem prover too weak. 1000 trivial. 0 not checked. [2019-12-07 10:45:09,163 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 10:45:09,163 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23] total 26 [2019-12-07 10:45:09,163 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956265384] [2019-12-07 10:45:09,163 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-12-07 10:45:09,163 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 10:45:09,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-12-07 10:45:09,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2019-12-07 10:45:09,164 INFO L87 Difference]: Start difference. First operand 142 states and 238 transitions. Second operand 26 states. [2019-12-07 10:45:09,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 10:45:09,705 INFO L93 Difference]: Finished difference Result 187 states and 306 transitions. [2019-12-07 10:45:09,705 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-12-07 10:45:09,705 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 182 [2019-12-07 10:45:09,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 10:45:09,706 INFO L225 Difference]: With dead ends: 187 [2019-12-07 10:45:09,706 INFO L226 Difference]: Without dead ends: 0 [2019-12-07 10:45:09,708 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=527, Invalid=2443, Unknown=0, NotChecked=0, Total=2970 [2019-12-07 10:45:09,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-12-07 10:45:09,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-12-07 10:45:09,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-12-07 10:45:09,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-12-07 10:45:09,709 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 182 [2019-12-07 10:45:09,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 10:45:09,709 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-12-07 10:45:09,709 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-12-07 10:45:09,709 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-12-07 10:45:09,709 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-12-07 10:45:09,910 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 10:45:09,913 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-12-07 10:45:11,837 WARN L192 SmtUtils]: Spent 926.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 46 [2019-12-07 10:45:11,905 INFO L246 CegarLoopResult]: For program point L33(lines 33 38) no Hoare annotation was computed. [2019-12-07 10:45:11,905 INFO L246 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-12-07 10:45:11,905 INFO L246 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-12-07 10:45:11,905 INFO L246 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-12-07 10:45:11,905 INFO L246 CegarLoopResult]: For program point L27(lines 27 31) no Hoare annotation was computed. [2019-12-07 10:45:11,905 INFO L249 CegarLoopResult]: At program point L25(lines 25 45) the Hoare annotation is: true [2019-12-07 10:45:11,905 INFO L246 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 43) no Hoare annotation was computed. [2019-12-07 10:45:11,905 INFO L246 CegarLoopResult]: For program point L43(line 43) no Hoare annotation was computed. [2019-12-07 10:45:11,905 INFO L246 CegarLoopResult]: For program point L40(lines 40 44) no Hoare annotation was computed. [2019-12-07 10:45:11,905 INFO L249 CegarLoopResult]: At program point L39(line 39) the Hoare annotation is: true [2019-12-07 10:45:11,905 INFO L246 CegarLoopResult]: For program point L39-1(line 39) no Hoare annotation was computed. [2019-12-07 10:45:11,905 INFO L246 CegarLoopResult]: For program point ackermannEXIT(lines 14 22) no Hoare annotation was computed. [2019-12-07 10:45:11,905 INFO L249 CegarLoopResult]: At program point ackermannENTRY(lines 14 22) the Hoare annotation is: true [2019-12-07 10:45:11,906 INFO L242 CegarLoopResult]: At program point L21(line 21) the Hoare annotation is: (and (or (not (<= |ackermann_#in~n| 1)) (not (= |ackermann_#in~m| 0))) (= ackermann_~m |ackermann_#in~m|) (= ackermann_~n |ackermann_#in~n|)) [2019-12-07 10:45:11,906 INFO L246 CegarLoopResult]: For program point L21-1(line 21) no Hoare annotation was computed. [2019-12-07 10:45:11,906 INFO L242 CegarLoopResult]: At program point L19(line 19) the Hoare annotation is: (and (= |ackermann_#in~n| 0) (= ackermann_~m |ackermann_#in~m|) (= ackermann_~n |ackermann_#in~n|)) [2019-12-07 10:45:11,906 INFO L242 CegarLoopResult]: At program point L21-2(line 21) the Hoare annotation is: (let ((.cse0 (<= 3 |ackermann_#t~ret1|)) (.cse3 (not (<= 1 |ackermann_#in~m|))) (.cse5 (= |ackermann_#in~m| 0))) (and (let ((.cse1 (<= |ackermann_#in~n| 2)) (.cse4 (<= 5 |ackermann_#t~ret1|)) (.cse2 (<= |ackermann_#in~m| 1))) (or (and .cse0 (<= |ackermann_#in~n| 1)) (and .cse1 .cse2) .cse3 (<= 6 |ackermann_#t~ret1|) (and .cse4 .cse1 (<= |ackermann_#in~m| 2)) (and (<= 4 |ackermann_#t~ret1|) (<= |ackermann_#in~n| 3) .cse2) (and .cse4 (<= |ackermann_#in~n| 4) .cse2))) (= ackermann_~m |ackermann_#in~m|) (or (not (<= |ackermann_#in~m| 0)) .cse5) (= ackermann_~n |ackermann_#in~n|) (or .cse5 (not (<= |ackermann_#in~n| 0))) (or .cse0 .cse3 (= |ackermann_#in~n| 1)) (or .cse5 (<= 2 |ackermann_#t~ret1|)))) [2019-12-07 10:45:11,906 INFO L246 CegarLoopResult]: For program point L18(lines 18 20) no Hoare annotation was computed. [2019-12-07 10:45:11,906 INFO L246 CegarLoopResult]: For program point L19-1(line 19) no Hoare annotation was computed. [2019-12-07 10:45:11,906 INFO L246 CegarLoopResult]: For program point L21-3(line 21) no Hoare annotation was computed. [2019-12-07 10:45:11,906 INFO L246 CegarLoopResult]: For program point L15(lines 15 17) no Hoare annotation was computed. [2019-12-07 10:45:11,906 INFO L246 CegarLoopResult]: For program point ackermannFINAL(lines 14 22) no Hoare annotation was computed. [2019-12-07 10:45:11,912 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 10:45:11 BoogieIcfgContainer [2019-12-07 10:45:11,912 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 10:45:11,913 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 10:45:11,913 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 10:45:11,913 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 10:45:11,913 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 10:44:58" (3/4) ... [2019-12-07 10:45:11,915 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-12-07 10:45:11,920 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ackermann [2019-12-07 10:45:11,923 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2019-12-07 10:45:11,923 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2019-12-07 10:45:11,953 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_3f7d333c-6f2a-4326-9dcf-334f0bfa8035/bin/uautomizer/witness.graphml [2019-12-07 10:45:11,953 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 10:45:11,954 INFO L168 Benchmark]: Toolchain (without parser) took 13630.85 ms. Allocated memory was 1.0 GB in the beginning and 1.4 GB in the end (delta: 321.4 MB). Free memory was 946.2 MB in the beginning and 1.1 GB in the end (delta: -187.0 MB). Peak memory consumption was 134.4 MB. Max. memory is 11.5 GB. [2019-12-07 10:45:11,955 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 1.0 GB. Free memory is still 961.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 10:45:11,955 INFO L168 Benchmark]: CACSL2BoogieTranslator took 184.61 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 117.4 MB). Free memory was 946.2 MB in the beginning and 1.1 GB in the end (delta: -166.2 MB). Peak memory consumption was 24.0 MB. Max. memory is 11.5 GB. [2019-12-07 10:45:11,955 INFO L168 Benchmark]: Boogie Procedure Inliner took 21.85 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 10:45:11,956 INFO L168 Benchmark]: Boogie Preprocessor took 12.87 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 10:45:11,956 INFO L168 Benchmark]: RCFGBuilder took 144.42 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 16.6 MB). Peak memory consumption was 16.6 MB. Max. memory is 11.5 GB. [2019-12-07 10:45:11,957 INFO L168 Benchmark]: TraceAbstraction took 13223.02 ms. Allocated memory was 1.1 GB in the beginning and 1.4 GB in the end (delta: 203.9 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -50.5 MB). Peak memory consumption was 432.2 MB. Max. memory is 11.5 GB. [2019-12-07 10:45:11,957 INFO L168 Benchmark]: Witness Printer took 41.03 ms. Allocated memory is still 1.4 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 13.1 MB). Peak memory consumption was 13.1 MB. Max. memory is 11.5 GB. [2019-12-07 10:45:11,959 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 1.0 GB. Free memory is still 961.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 184.61 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 117.4 MB). Free memory was 946.2 MB in the beginning and 1.1 GB in the end (delta: -166.2 MB). Peak memory consumption was 24.0 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 21.85 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 12.87 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 144.42 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 16.6 MB). Peak memory consumption was 16.6 MB. Max. memory is 11.5 GB. * TraceAbstraction took 13223.02 ms. Allocated memory was 1.1 GB in the beginning and 1.4 GB in the end (delta: 203.9 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -50.5 MB). Peak memory consumption was 432.2 MB. Max. memory is 11.5 GB. * Witness Printer took 41.03 ms. Allocated memory is still 1.4 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 13.1 MB). Peak memory consumption was 13.1 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 43]: 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: 25]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 22 locations, 1 error locations. Result: SAFE, OverallTime: 11.1s, OverallIterations: 10, TraceHistogramMax: 27, AutomataDifference: 5.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.9s, HoareTripleCheckerStatistics: 237 SDtfs, 399 SDslu, 1205 SDs, 0 SdLazy, 4667 SolverSat, 1171 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1666 GetRequests, 1273 SyntacticMatches, 0 SemanticMatches, 393 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5425 ImplicationChecksByTransitivity, 4.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=142occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 10 MinimizatonAttempts, 109 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 6 LocationsWithAnnotation, 566 PreInvPairs, 1398 NumberOfFragments, 122 HoareAnnotationTreeSize, 566 FomulaSimplifications, 204196 FormulaSimplificationTreeSizeReduction, 0.9s HoareSimplificationTime, 6 FomulaSimplificationsInter, 4649 FormulaSimplificationTreeSizeReductionInter, 1.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 2.7s InterpolantComputationTime, 1941 NumberOfCodeBlocks, 1848 NumberOfCodeBlocksAsserted, 47 NumberOfCheckSat, 1922 ConstructedInterpolants, 0 QuantifiedInterpolants, 532102 SizeOfPredicates, 68 NumberOfNonLiveVariables, 2584 ConjunctsInSsa, 188 ConjunctsInUnsatCore, 19 InterpolantComputations, 1 PerfectInterpolantSequences, 10957/13822 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...