./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem01_label24.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_68823152-52ec-4d1f-89e7-0f4e2805892d/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_68823152-52ec-4d1f-89e7-0f4e2805892d/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_68823152-52ec-4d1f-89e7-0f4e2805892d/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_68823152-52ec-4d1f-89e7-0f4e2805892d/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem01_label24.c -s /tmp/vcloud-vcloud-master/worker/run_dir_68823152-52ec-4d1f-89e7-0f4e2805892d/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_68823152-52ec-4d1f-89e7-0f4e2805892d/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7f5e2cf5778d35276df37ef4653bf7d5a3d1b66b .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 17:25:58,510 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 17:25:58,512 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 17:25:58,547 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 17:25:58,548 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 17:25:58,549 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 17:25:58,550 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 17:25:58,553 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 17:25:58,555 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 17:25:58,556 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 17:25:58,557 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 17:25:58,558 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 17:25:58,559 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 17:25:58,560 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 17:25:58,561 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 17:25:58,562 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 17:25:58,563 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 17:25:58,564 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 17:25:58,566 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 17:25:58,568 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 17:25:58,570 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 17:25:58,571 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 17:25:58,572 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 17:25:58,573 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 17:25:58,575 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 17:25:58,575 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 17:25:58,576 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 17:25:58,576 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 17:25:58,577 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 17:25:58,578 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 17:25:58,578 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 17:25:58,579 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 17:25:58,579 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 17:25:58,580 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 17:25:58,581 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 17:25:58,581 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 17:25:58,581 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 17:25:58,581 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 17:25:58,582 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 17:25:58,582 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 17:25:58,583 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 17:25:58,583 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_68823152-52ec-4d1f-89e7-0f4e2805892d/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-09 17:25:58,600 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 17:25:58,600 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 17:25:58,600 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 17:25:58,600 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 17:25:58,601 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 17:25:58,601 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 17:25:58,601 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 17:25:58,601 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 17:25:58,601 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 17:25:58,601 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 17:25:58,601 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 17:25:58,601 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 17:25:58,602 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 17:25:58,602 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 17:25:58,602 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 17:25:58,602 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 17:25:58,602 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 17:25:58,603 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 17:25:58,603 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 17:25:58,603 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 17:25:58,603 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 17:25:58,603 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 17:25:58,603 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 17:25:58,603 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 17:25:58,603 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 17:25:58,604 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 17:25:58,604 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 17:25:58,604 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 17:25:58,604 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 17:25:58,604 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 17:25:58,604 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 17:25:58,604 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 17:25:58,604 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 17:25:58,605 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 17:25:58,605 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 17:25:58,605 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 17:25:58,605 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 17:25:58,605 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 17:25:58,605 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 17:25:58,605 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_68823152-52ec-4d1f-89e7-0f4e2805892d/bin/utaipan/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_68823152-52ec-4d1f-89e7-0f4e2805892d/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7f5e2cf5778d35276df37ef4653bf7d5a3d1b66b [2020-12-09 17:25:58,767 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 17:25:58,784 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 17:25:58,789 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 17:25:58,790 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 17:25:58,790 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 17:25:58,791 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_68823152-52ec-4d1f-89e7-0f4e2805892d/bin/utaipan/../../sv-benchmarks/c/eca-rers2012/Problem01_label24.c [2020-12-09 17:25:58,831 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_68823152-52ec-4d1f-89e7-0f4e2805892d/bin/utaipan/data/2f769435c/a2f1b81a64f240a991cbd606a13da5a0/FLAG45f2e1a5f [2020-12-09 17:25:59,289 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 17:25:59,290 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_68823152-52ec-4d1f-89e7-0f4e2805892d/sv-benchmarks/c/eca-rers2012/Problem01_label24.c [2020-12-09 17:25:59,302 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_68823152-52ec-4d1f-89e7-0f4e2805892d/bin/utaipan/data/2f769435c/a2f1b81a64f240a991cbd606a13da5a0/FLAG45f2e1a5f [2020-12-09 17:25:59,818 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_68823152-52ec-4d1f-89e7-0f4e2805892d/bin/utaipan/data/2f769435c/a2f1b81a64f240a991cbd606a13da5a0 [2020-12-09 17:25:59,820 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 17:25:59,822 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 17:25:59,823 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 17:25:59,823 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 17:25:59,825 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 17:25:59,826 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 05:25:59" (1/1) ... [2020-12-09 17:25:59,827 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29a26e4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:25:59, skipping insertion in model container [2020-12-09 17:25:59,828 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 05:25:59" (1/1) ... [2020-12-09 17:25:59,833 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 17:25:59,862 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 17:26:00,063 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_68823152-52ec-4d1f-89e7-0f4e2805892d/sv-benchmarks/c/eca-rers2012/Problem01_label24.c[17735,17748] [2020-12-09 17:26:00,087 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 17:26:00,094 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 17:26:00,161 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_68823152-52ec-4d1f-89e7-0f4e2805892d/sv-benchmarks/c/eca-rers2012/Problem01_label24.c[17735,17748] [2020-12-09 17:26:00,171 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 17:26:00,182 INFO L208 MainTranslator]: Completed translation [2020-12-09 17:26:00,183 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:26:00 WrapperNode [2020-12-09 17:26:00,183 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 17:26:00,183 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 17:26:00,184 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 17:26:00,184 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 17:26:00,190 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:26:00" (1/1) ... [2020-12-09 17:26:00,209 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:26:00" (1/1) ... [2020-12-09 17:26:00,245 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 17:26:00,246 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 17:26:00,246 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 17:26:00,246 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 17:26:00,252 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:26:00" (1/1) ... [2020-12-09 17:26:00,253 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:26:00" (1/1) ... [2020-12-09 17:26:00,256 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:26:00" (1/1) ... [2020-12-09 17:26:00,256 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:26:00" (1/1) ... [2020-12-09 17:26:00,271 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:26:00" (1/1) ... [2020-12-09 17:26:00,278 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:26:00" (1/1) ... [2020-12-09 17:26:00,283 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:26:00" (1/1) ... [2020-12-09 17:26:00,290 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 17:26:00,291 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 17:26:00,291 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 17:26:00,292 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 17:26:00,292 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:26:00" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_68823152-52ec-4d1f-89e7-0f4e2805892d/bin/utaipan/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 [2020-12-09 17:26:00,350 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 17:26:00,351 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 17:26:00,351 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 17:26:00,351 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 17:26:01,505 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 17:26:01,506 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2020-12-09 17:26:01,508 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 05:26:01 BoogieIcfgContainer [2020-12-09 17:26:01,508 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 17:26:01,510 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 17:26:01,510 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 17:26:01,513 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 17:26:01,513 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 05:25:59" (1/3) ... [2020-12-09 17:26:01,514 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38cd4844 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 05:26:01, skipping insertion in model container [2020-12-09 17:26:01,514 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:26:00" (2/3) ... [2020-12-09 17:26:01,515 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38cd4844 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 05:26:01, skipping insertion in model container [2020-12-09 17:26:01,515 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 05:26:01" (3/3) ... [2020-12-09 17:26:01,516 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem01_label24.c [2020-12-09 17:26:01,529 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 17:26:01,532 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-09 17:26:01,539 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-09 17:26:01,556 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 17:26:01,556 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 17:26:01,556 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 17:26:01,556 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 17:26:01,556 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 17:26:01,556 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 17:26:01,556 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 17:26:01,556 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 17:26:01,567 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states. [2020-12-09 17:26:01,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-09 17:26:01,572 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:26:01,573 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 17:26:01,573 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 17:26:01,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:26:01,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1806912600, now seen corresponding path program 1 times [2020-12-09 17:26:01,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:26:01,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125193033] [2020-12-09 17:26:01,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:26:01,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:26:01,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:26:01,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125193033] [2020-12-09 17:26:01,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:26:01,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 17:26:01,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582247705] [2020-12-09 17:26:01,823 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 17:26:01,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:26:01,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 17:26:01,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 17:26:01,834 INFO L87 Difference]: Start difference. First operand 76 states. Second operand 3 states. [2020-12-09 17:26:02,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:26:02,137 INFO L93 Difference]: Finished difference Result 224 states and 428 transitions. [2020-12-09 17:26:02,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 17:26:02,138 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 71 [2020-12-09 17:26:02,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:26:02,149 INFO L225 Difference]: With dead ends: 224 [2020-12-09 17:26:02,149 INFO L226 Difference]: Without dead ends: 145 [2020-12-09 17:26:02,152 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 17:26:02,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-12-09 17:26:02,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2020-12-09 17:26:02,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-12-09 17:26:02,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 259 transitions. [2020-12-09 17:26:02,191 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 259 transitions. Word has length 71 [2020-12-09 17:26:02,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:26:02,192 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 259 transitions. [2020-12-09 17:26:02,192 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 17:26:02,192 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 259 transitions. [2020-12-09 17:26:02,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-09 17:26:02,196 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:26:02,196 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 17:26:02,196 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 17:26:02,196 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 17:26:02,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:26:02,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1034857093, now seen corresponding path program 1 times [2020-12-09 17:26:02,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:26:02,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077896079] [2020-12-09 17:26:02,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:26:02,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:26:02,255 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:26:02,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077896079] [2020-12-09 17:26:02,255 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:26:02,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 17:26:02,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79758867] [2020-12-09 17:26:02,257 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 17:26:02,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:26:02,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 17:26:02,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 17:26:02,258 INFO L87 Difference]: Start difference. First operand 145 states and 259 transitions. Second operand 3 states. [2020-12-09 17:26:02,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:26:02,513 INFO L93 Difference]: Finished difference Result 431 states and 774 transitions. [2020-12-09 17:26:02,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 17:26:02,513 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 77 [2020-12-09 17:26:02,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:26:02,516 INFO L225 Difference]: With dead ends: 431 [2020-12-09 17:26:02,516 INFO L226 Difference]: Without dead ends: 287 [2020-12-09 17:26:02,517 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 17:26:02,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2020-12-09 17:26:02,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 287. [2020-12-09 17:26:02,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2020-12-09 17:26:02,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 468 transitions. [2020-12-09 17:26:02,537 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 468 transitions. Word has length 77 [2020-12-09 17:26:02,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:26:02,537 INFO L481 AbstractCegarLoop]: Abstraction has 287 states and 468 transitions. [2020-12-09 17:26:02,537 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 17:26:02,537 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 468 transitions. [2020-12-09 17:26:02,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-09 17:26:02,540 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:26:02,540 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 17:26:02,540 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-09 17:26:02,540 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 17:26:02,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:26:02,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1703777735, now seen corresponding path program 1 times [2020-12-09 17:26:02,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:26:02,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543411201] [2020-12-09 17:26:02,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:26:02,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:26:02,734 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:26:02,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543411201] [2020-12-09 17:26:02,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:26:02,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 17:26:02,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079165149] [2020-12-09 17:26:02,736 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 17:26:02,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:26:02,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 17:26:02,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 17:26:02,737 INFO L87 Difference]: Start difference. First operand 287 states and 468 transitions. Second operand 4 states. [2020-12-09 17:26:03,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:26:03,092 INFO L93 Difference]: Finished difference Result 713 states and 1141 transitions. [2020-12-09 17:26:03,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 17:26:03,092 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 78 [2020-12-09 17:26:03,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:26:03,094 INFO L225 Difference]: With dead ends: 713 [2020-12-09 17:26:03,094 INFO L226 Difference]: Without dead ends: 358 [2020-12-09 17:26:03,095 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 17:26:03,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2020-12-09 17:26:03,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 358. [2020-12-09 17:26:03,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 358 states. [2020-12-09 17:26:03,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 482 transitions. [2020-12-09 17:26:03,110 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 482 transitions. Word has length 78 [2020-12-09 17:26:03,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:26:03,110 INFO L481 AbstractCegarLoop]: Abstraction has 358 states and 482 transitions. [2020-12-09 17:26:03,110 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 17:26:03,110 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 482 transitions. [2020-12-09 17:26:03,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-09 17:26:03,111 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:26:03,111 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 17:26:03,112 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-09 17:26:03,112 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 17:26:03,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:26:03,112 INFO L82 PathProgramCache]: Analyzing trace with hash 350098807, now seen corresponding path program 1 times [2020-12-09 17:26:03,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:26:03,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182144793] [2020-12-09 17:26:03,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:26:03,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:26:03,152 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-09 17:26:03,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182144793] [2020-12-09 17:26:03,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:26:03,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 17:26:03,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075284219] [2020-12-09 17:26:03,153 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 17:26:03,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:26:03,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 17:26:03,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 17:26:03,153 INFO L87 Difference]: Start difference. First operand 358 states and 482 transitions. Second operand 3 states. [2020-12-09 17:26:03,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:26:03,389 INFO L93 Difference]: Finished difference Result 857 states and 1180 transitions. [2020-12-09 17:26:03,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 17:26:03,389 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 86 [2020-12-09 17:26:03,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:26:03,391 INFO L225 Difference]: With dead ends: 857 [2020-12-09 17:26:03,391 INFO L226 Difference]: Without dead ends: 500 [2020-12-09 17:26:03,392 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 17:26:03,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2020-12-09 17:26:03,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 500. [2020-12-09 17:26:03,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 500 states. [2020-12-09 17:26:03,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 649 transitions. [2020-12-09 17:26:03,405 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 649 transitions. Word has length 86 [2020-12-09 17:26:03,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:26:03,405 INFO L481 AbstractCegarLoop]: Abstraction has 500 states and 649 transitions. [2020-12-09 17:26:03,405 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 17:26:03,405 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 649 transitions. [2020-12-09 17:26:03,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-09 17:26:03,406 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:26:03,406 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 17:26:03,406 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-09 17:26:03,406 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 17:26:03,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:26:03,407 INFO L82 PathProgramCache]: Analyzing trace with hash -1470706213, now seen corresponding path program 1 times [2020-12-09 17:26:03,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:26:03,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251285312] [2020-12-09 17:26:03,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:26:03,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:26:03,436 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-09 17:26:03,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251285312] [2020-12-09 17:26:03,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:26:03,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 17:26:03,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918589845] [2020-12-09 17:26:03,437 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 17:26:03,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:26:03,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 17:26:03,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 17:26:03,437 INFO L87 Difference]: Start difference. First operand 500 states and 649 transitions. Second operand 3 states. [2020-12-09 17:26:03,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:26:03,656 INFO L93 Difference]: Finished difference Result 1496 states and 1944 transitions. [2020-12-09 17:26:03,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 17:26:03,656 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 95 [2020-12-09 17:26:03,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:26:03,660 INFO L225 Difference]: With dead ends: 1496 [2020-12-09 17:26:03,660 INFO L226 Difference]: Without dead ends: 997 [2020-12-09 17:26:03,661 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 17:26:03,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2020-12-09 17:26:03,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 784. [2020-12-09 17:26:03,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 784 states. [2020-12-09 17:26:03,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 1029 transitions. [2020-12-09 17:26:03,681 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 1029 transitions. Word has length 95 [2020-12-09 17:26:03,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:26:03,681 INFO L481 AbstractCegarLoop]: Abstraction has 784 states and 1029 transitions. [2020-12-09 17:26:03,681 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 17:26:03,681 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 1029 transitions. [2020-12-09 17:26:03,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-12-09 17:26:03,682 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:26:03,682 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 17:26:03,682 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-09 17:26:03,682 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 17:26:03,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:26:03,683 INFO L82 PathProgramCache]: Analyzing trace with hash 1745911626, now seen corresponding path program 1 times [2020-12-09 17:26:03,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:26:03,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278410800] [2020-12-09 17:26:03,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:26:03,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:26:03,729 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-09 17:26:03,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278410800] [2020-12-09 17:26:03,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:26:03,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 17:26:03,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775091335] [2020-12-09 17:26:03,730 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 17:26:03,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:26:03,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 17:26:03,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 17:26:03,730 INFO L87 Difference]: Start difference. First operand 784 states and 1029 transitions. Second operand 4 states. [2020-12-09 17:26:04,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:26:04,050 INFO L93 Difference]: Finished difference Result 1709 states and 2278 transitions. [2020-12-09 17:26:04,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 17:26:04,050 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 101 [2020-12-09 17:26:04,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:26:04,054 INFO L225 Difference]: With dead ends: 1709 [2020-12-09 17:26:04,054 INFO L226 Difference]: Without dead ends: 926 [2020-12-09 17:26:04,055 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 17:26:04,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 926 states. [2020-12-09 17:26:04,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 926 to 926. [2020-12-09 17:26:04,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 926 states. [2020-12-09 17:26:04,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 1184 transitions. [2020-12-09 17:26:04,072 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 1184 transitions. Word has length 101 [2020-12-09 17:26:04,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:26:04,072 INFO L481 AbstractCegarLoop]: Abstraction has 926 states and 1184 transitions. [2020-12-09 17:26:04,072 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 17:26:04,072 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 1184 transitions. [2020-12-09 17:26:04,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-12-09 17:26:04,074 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:26:04,074 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 17:26:04,074 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-09 17:26:04,074 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 17:26:04,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:26:04,074 INFO L82 PathProgramCache]: Analyzing trace with hash -656961203, now seen corresponding path program 1 times [2020-12-09 17:26:04,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:26:04,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694904822] [2020-12-09 17:26:04,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:26:04,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:26:04,131 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-09 17:26:04,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694904822] [2020-12-09 17:26:04,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:26:04,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 17:26:04,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920127682] [2020-12-09 17:26:04,132 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 17:26:04,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:26:04,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 17:26:04,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 17:26:04,133 INFO L87 Difference]: Start difference. First operand 926 states and 1184 transitions. Second operand 4 states. [2020-12-09 17:26:04,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:26:04,478 INFO L93 Difference]: Finished difference Result 2206 states and 2814 transitions. [2020-12-09 17:26:04,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 17:26:04,479 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 115 [2020-12-09 17:26:04,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:26:04,485 INFO L225 Difference]: With dead ends: 2206 [2020-12-09 17:26:04,485 INFO L226 Difference]: Without dead ends: 1281 [2020-12-09 17:26:04,487 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 17:26:04,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1281 states. [2020-12-09 17:26:04,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1281 to 1210. [2020-12-09 17:26:04,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1210 states. [2020-12-09 17:26:04,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1210 states to 1210 states and 1513 transitions. [2020-12-09 17:26:04,512 INFO L78 Accepts]: Start accepts. Automaton has 1210 states and 1513 transitions. Word has length 115 [2020-12-09 17:26:04,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:26:04,512 INFO L481 AbstractCegarLoop]: Abstraction has 1210 states and 1513 transitions. [2020-12-09 17:26:04,512 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 17:26:04,512 INFO L276 IsEmpty]: Start isEmpty. Operand 1210 states and 1513 transitions. [2020-12-09 17:26:04,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-12-09 17:26:04,514 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:26:04,514 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 17:26:04,514 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-09 17:26:04,514 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 17:26:04,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:26:04,514 INFO L82 PathProgramCache]: Analyzing trace with hash 905965608, now seen corresponding path program 1 times [2020-12-09 17:26:04,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:26:04,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251907391] [2020-12-09 17:26:04,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:26:04,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:26:04,604 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 66 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:26:04,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251907391] [2020-12-09 17:26:04,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772815766] [2020-12-09 17:26:04,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_68823152-52ec-4d1f-89e7-0f4e2805892d/bin/utaipan/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 [2020-12-09 17:26:04,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:26:04,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-09 17:26:04,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 17:26:04,809 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-12-09 17:26:04,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 17:26:04,897 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-12-09 17:26:04,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-12-09 17:26:04,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 5 [2020-12-09 17:26:04,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3003261] [2020-12-09 17:26:04,898 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 17:26:04,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:26:04,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 17:26:04,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 17:26:04,898 INFO L87 Difference]: Start difference. First operand 1210 states and 1513 transitions. Second operand 3 states. [2020-12-09 17:26:05,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:26:05,113 INFO L93 Difference]: Finished difference Result 2419 states and 3025 transitions. [2020-12-09 17:26:05,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 17:26:05,113 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 132 [2020-12-09 17:26:05,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:26:05,118 INFO L225 Difference]: With dead ends: 2419 [2020-12-09 17:26:05,118 INFO L226 Difference]: Without dead ends: 1210 [2020-12-09 17:26:05,119 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 262 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 17:26:05,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1210 states. [2020-12-09 17:26:05,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1210 to 1068. [2020-12-09 17:26:05,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1068 states. [2020-12-09 17:26:05,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1068 states to 1068 states and 1290 transitions. [2020-12-09 17:26:05,137 INFO L78 Accepts]: Start accepts. Automaton has 1068 states and 1290 transitions. Word has length 132 [2020-12-09 17:26:05,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:26:05,138 INFO L481 AbstractCegarLoop]: Abstraction has 1068 states and 1290 transitions. [2020-12-09 17:26:05,138 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 17:26:05,138 INFO L276 IsEmpty]: Start isEmpty. Operand 1068 states and 1290 transitions. [2020-12-09 17:26:05,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-12-09 17:26:05,140 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:26:05,140 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 17:26:05,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2020-12-09 17:26:05,341 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 17:26:05,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:26:05,342 INFO L82 PathProgramCache]: Analyzing trace with hash -1083766142, now seen corresponding path program 1 times [2020-12-09 17:26:05,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:26:05,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001984407] [2020-12-09 17:26:05,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:26:05,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:26:05,554 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 96 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-09 17:26:05,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001984407] [2020-12-09 17:26:05,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611937104] [2020-12-09 17:26:05,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_68823152-52ec-4d1f-89e7-0f4e2805892d/bin/utaipan/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 [2020-12-09 17:26:05,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:26:05,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-09 17:26:05,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 17:26:05,730 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2020-12-09 17:26:05,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 17:26:05,835 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2020-12-09 17:26:05,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-12-09 17:26:05,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 5 [2020-12-09 17:26:05,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400136689] [2020-12-09 17:26:05,836 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 17:26:05,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:26:05,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 17:26:05,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-09 17:26:05,837 INFO L87 Difference]: Start difference. First operand 1068 states and 1290 transitions. Second operand 3 states. [2020-12-09 17:26:06,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:26:06,040 INFO L93 Difference]: Finished difference Result 2206 states and 2674 transitions. [2020-12-09 17:26:06,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 17:26:06,040 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 148 [2020-12-09 17:26:06,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:26:06,045 INFO L225 Difference]: With dead ends: 2206 [2020-12-09 17:26:06,045 INFO L226 Difference]: Without dead ends: 1139 [2020-12-09 17:26:06,047 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 294 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-09 17:26:06,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1139 states. [2020-12-09 17:26:06,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1139 to 1139. [2020-12-09 17:26:06,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1139 states. [2020-12-09 17:26:06,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1139 states to 1139 states and 1334 transitions. [2020-12-09 17:26:06,073 INFO L78 Accepts]: Start accepts. Automaton has 1139 states and 1334 transitions. Word has length 148 [2020-12-09 17:26:06,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:26:06,073 INFO L481 AbstractCegarLoop]: Abstraction has 1139 states and 1334 transitions. [2020-12-09 17:26:06,073 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 17:26:06,074 INFO L276 IsEmpty]: Start isEmpty. Operand 1139 states and 1334 transitions. [2020-12-09 17:26:06,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-12-09 17:26:06,077 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:26:06,077 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 17:26:06,277 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 17:26:06,278 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 17:26:06,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:26:06,278 INFO L82 PathProgramCache]: Analyzing trace with hash -1216276442, now seen corresponding path program 1 times [2020-12-09 17:26:06,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:26:06,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846215470] [2020-12-09 17:26:06,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:26:06,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:26:06,362 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-12-09 17:26:06,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846215470] [2020-12-09 17:26:06,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:26:06,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 17:26:06,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581328487] [2020-12-09 17:26:06,363 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 17:26:06,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:26:06,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 17:26:06,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 17:26:06,364 INFO L87 Difference]: Start difference. First operand 1139 states and 1334 transitions. Second operand 4 states. [2020-12-09 17:26:06,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:26:06,702 INFO L93 Difference]: Finished difference Result 2490 states and 2900 transitions. [2020-12-09 17:26:06,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 17:26:06,702 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 151 [2020-12-09 17:26:06,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:26:06,707 INFO L225 Difference]: With dead ends: 2490 [2020-12-09 17:26:06,707 INFO L226 Difference]: Without dead ends: 1352 [2020-12-09 17:26:06,708 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 17:26:06,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1352 states. [2020-12-09 17:26:06,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1352 to 1139. [2020-12-09 17:26:06,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1139 states. [2020-12-09 17:26:06,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1139 states to 1139 states and 1322 transitions. [2020-12-09 17:26:06,736 INFO L78 Accepts]: Start accepts. Automaton has 1139 states and 1322 transitions. Word has length 151 [2020-12-09 17:26:06,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:26:06,736 INFO L481 AbstractCegarLoop]: Abstraction has 1139 states and 1322 transitions. [2020-12-09 17:26:06,736 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 17:26:06,736 INFO L276 IsEmpty]: Start isEmpty. Operand 1139 states and 1322 transitions. [2020-12-09 17:26:06,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2020-12-09 17:26:06,740 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:26:06,740 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 17:26:06,740 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-09 17:26:06,740 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 17:26:06,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:26:06,741 INFO L82 PathProgramCache]: Analyzing trace with hash 2109682500, now seen corresponding path program 1 times [2020-12-09 17:26:06,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:26:06,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246160212] [2020-12-09 17:26:06,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:26:06,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:26:06,813 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 195 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-12-09 17:26:06,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246160212] [2020-12-09 17:26:06,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:26:06,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 17:26:06,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641688357] [2020-12-09 17:26:06,814 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 17:26:06,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:26:06,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 17:26:06,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 17:26:06,815 INFO L87 Difference]: Start difference. First operand 1139 states and 1322 transitions. Second operand 3 states. [2020-12-09 17:26:07,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:26:07,045 INFO L93 Difference]: Finished difference Result 2561 states and 2971 transitions. [2020-12-09 17:26:07,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 17:26:07,046 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 194 [2020-12-09 17:26:07,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:26:07,051 INFO L225 Difference]: With dead ends: 2561 [2020-12-09 17:26:07,051 INFO L226 Difference]: Without dead ends: 1423 [2020-12-09 17:26:07,052 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 17:26:07,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1423 states. [2020-12-09 17:26:07,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1423 to 1352. [2020-12-09 17:26:07,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1352 states. [2020-12-09 17:26:07,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1352 states to 1352 states and 1533 transitions. [2020-12-09 17:26:07,072 INFO L78 Accepts]: Start accepts. Automaton has 1352 states and 1533 transitions. Word has length 194 [2020-12-09 17:26:07,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:26:07,072 INFO L481 AbstractCegarLoop]: Abstraction has 1352 states and 1533 transitions. [2020-12-09 17:26:07,072 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 17:26:07,072 INFO L276 IsEmpty]: Start isEmpty. Operand 1352 states and 1533 transitions. [2020-12-09 17:26:07,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2020-12-09 17:26:07,074 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:26:07,075 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 17:26:07,075 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-09 17:26:07,075 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 17:26:07,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:26:07,075 INFO L82 PathProgramCache]: Analyzing trace with hash 236743245, now seen corresponding path program 1 times [2020-12-09 17:26:07,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:26:07,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605598341] [2020-12-09 17:26:07,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:26:07,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:26:07,287 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 143 proven. 86 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-12-09 17:26:07,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605598341] [2020-12-09 17:26:07,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458116909] [2020-12-09 17:26:07,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_68823152-52ec-4d1f-89e7-0f4e2805892d/bin/utaipan/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 [2020-12-09 17:26:07,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:26:07,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-09 17:26:07,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 17:26:07,518 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 144 proven. 0 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2020-12-09 17:26:07,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 17:26:07,633 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 144 proven. 0 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2020-12-09 17:26:07,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-12-09 17:26:07,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 6 [2020-12-09 17:26:07,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000525803] [2020-12-09 17:26:07,634 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 17:26:07,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:26:07,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 17:26:07,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-09 17:26:07,635 INFO L87 Difference]: Start difference. First operand 1352 states and 1533 transitions. Second operand 3 states. [2020-12-09 17:26:07,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:26:07,836 INFO L93 Difference]: Finished difference Result 3058 states and 3474 transitions. [2020-12-09 17:26:07,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 17:26:07,836 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 216 [2020-12-09 17:26:07,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:26:07,841 INFO L225 Difference]: With dead ends: 3058 [2020-12-09 17:26:07,841 INFO L226 Difference]: Without dead ends: 1352 [2020-12-09 17:26:07,842 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 430 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-09 17:26:07,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1352 states. [2020-12-09 17:26:07,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1352 to 1352. [2020-12-09 17:26:07,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1352 states. [2020-12-09 17:26:07,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1352 states to 1352 states and 1494 transitions. [2020-12-09 17:26:07,870 INFO L78 Accepts]: Start accepts. Automaton has 1352 states and 1494 transitions. Word has length 216 [2020-12-09 17:26:07,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:26:07,871 INFO L481 AbstractCegarLoop]: Abstraction has 1352 states and 1494 transitions. [2020-12-09 17:26:07,871 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 17:26:07,871 INFO L276 IsEmpty]: Start isEmpty. Operand 1352 states and 1494 transitions. [2020-12-09 17:26:07,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2020-12-09 17:26:07,876 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:26:07,877 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 17:26:08,078 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-09 17:26:08,078 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 17:26:08,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:26:08,080 INFO L82 PathProgramCache]: Analyzing trace with hash -706789139, now seen corresponding path program 1 times [2020-12-09 17:26:08,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:26:08,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336275309] [2020-12-09 17:26:08,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:26:08,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:26:08,241 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 307 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2020-12-09 17:26:08,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336275309] [2020-12-09 17:26:08,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:26:08,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 17:26:08,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387172660] [2020-12-09 17:26:08,242 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 17:26:08,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:26:08,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 17:26:08,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 17:26:08,242 INFO L87 Difference]: Start difference. First operand 1352 states and 1494 transitions. Second operand 3 states. [2020-12-09 17:26:08,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:26:08,419 INFO L93 Difference]: Finished difference Result 2204 states and 2451 transitions. [2020-12-09 17:26:08,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 17:26:08,419 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 245 [2020-12-09 17:26:08,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:26:08,419 INFO L225 Difference]: With dead ends: 2204 [2020-12-09 17:26:08,419 INFO L226 Difference]: Without dead ends: 0 [2020-12-09 17:26:08,420 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 17:26:08,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-09 17:26:08,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-09 17:26:08,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-09 17:26:08,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-09 17:26:08,421 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 245 [2020-12-09 17:26:08,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:26:08,421 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-09 17:26:08,421 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 17:26:08,421 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-09 17:26:08,421 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-09 17:26:08,421 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-09 17:26:08,422 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-12-09 17:26:08,619 WARN L197 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 32 [2020-12-09 17:26:08,748 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 32 [2020-12-09 17:26:08,750 INFO L262 CegarLoopResult]: For program point L102(lines 102 400) no Hoare annotation was computed. [2020-12-09 17:26:08,750 INFO L262 CegarLoopResult]: For program point L598(line 598) no Hoare annotation was computed. [2020-12-09 17:26:08,750 INFO L262 CegarLoopResult]: For program point L334(lines 334 400) no Hoare annotation was computed. [2020-12-09 17:26:08,750 INFO L262 CegarLoopResult]: For program point L302(lines 302 400) no Hoare annotation was computed. [2020-12-09 17:26:08,750 INFO L262 CegarLoopResult]: For program point L170(lines 170 400) no Hoare annotation was computed. [2020-12-09 17:26:08,750 INFO L262 CegarLoopResult]: For program point L204(lines 204 400) no Hoare annotation was computed. [2020-12-09 17:26:08,751 INFO L262 CegarLoopResult]: For program point L72(lines 72 400) no Hoare annotation was computed. [2020-12-09 17:26:08,751 INFO L262 CegarLoopResult]: For program point L271(lines 271 400) no Hoare annotation was computed. [2020-12-09 17:26:08,751 INFO L262 CegarLoopResult]: For program point L139(lines 139 400) no Hoare annotation was computed. [2020-12-09 17:26:08,751 INFO L262 CegarLoopResult]: For program point L371(lines 371 400) no Hoare annotation was computed. [2020-12-09 17:26:08,751 INFO L262 CegarLoopResult]: For program point L107(lines 107 400) no Hoare annotation was computed. [2020-12-09 17:26:08,751 INFO L262 CegarLoopResult]: For program point L41(lines 41 400) no Hoare annotation was computed. [2020-12-09 17:26:08,751 INFO L262 CegarLoopResult]: For program point L339(lines 339 400) no Hoare annotation was computed. [2020-12-09 17:26:08,751 INFO L262 CegarLoopResult]: For program point L207(lines 207 400) no Hoare annotation was computed. [2020-12-09 17:26:08,751 INFO L262 CegarLoopResult]: For program point L75(lines 75 400) no Hoare annotation was computed. [2020-12-09 17:26:08,751 INFO L262 CegarLoopResult]: For program point L373(lines 373 400) no Hoare annotation was computed. [2020-12-09 17:26:08,751 INFO L262 CegarLoopResult]: For program point L241(lines 241 400) no Hoare annotation was computed. [2020-12-09 17:26:08,751 INFO L262 CegarLoopResult]: For program point L175(lines 175 400) no Hoare annotation was computed. [2020-12-09 17:26:08,751 INFO L262 CegarLoopResult]: For program point L275(lines 275 400) no Hoare annotation was computed. [2020-12-09 17:26:08,751 INFO L262 CegarLoopResult]: For program point L375(lines 375 400) no Hoare annotation was computed. [2020-12-09 17:26:08,751 INFO L262 CegarLoopResult]: For program point L309(lines 309 400) no Hoare annotation was computed. [2020-12-09 17:26:08,751 INFO L262 CegarLoopResult]: For program point L45(lines 45 400) no Hoare annotation was computed. [2020-12-09 17:26:08,751 INFO L262 CegarLoopResult]: For program point L343(lines 343 400) no Hoare annotation was computed. [2020-12-09 17:26:08,751 INFO L262 CegarLoopResult]: For program point L112(lines 112 400) no Hoare annotation was computed. [2020-12-09 17:26:08,752 INFO L262 CegarLoopResult]: For program point L476-1(lines 40 585) no Hoare annotation was computed. [2020-12-09 17:26:08,752 INFO L262 CegarLoopResult]: For program point L278(lines 278 400) no Hoare annotation was computed. [2020-12-09 17:26:08,752 INFO L262 CegarLoopResult]: For program point L146(lines 146 400) no Hoare annotation was computed. [2020-12-09 17:26:08,752 INFO L262 CegarLoopResult]: For program point L213(lines 213 400) no Hoare annotation was computed. [2020-12-09 17:26:08,752 INFO L262 CegarLoopResult]: For program point L82(lines 82 400) no Hoare annotation was computed. [2020-12-09 17:26:08,752 INFO L262 CegarLoopResult]: For program point L479-1(lines 40 585) no Hoare annotation was computed. [2020-12-09 17:26:08,752 INFO L262 CegarLoopResult]: For program point L347(lines 347 400) no Hoare annotation was computed. [2020-12-09 17:26:08,752 INFO L262 CegarLoopResult]: For program point L248(lines 248 400) no Hoare annotation was computed. [2020-12-09 17:26:08,752 INFO L262 CegarLoopResult]: For program point L480(line 480) no Hoare annotation was computed. [2020-12-09 17:26:08,752 INFO L262 CegarLoopResult]: For program point L183(lines 183 400) no Hoare annotation was computed. [2020-12-09 17:26:08,752 INFO L262 CegarLoopResult]: For program point L150(lines 150 400) no Hoare annotation was computed. [2020-12-09 17:26:08,752 INFO L262 CegarLoopResult]: For program point L382(lines 382 400) no Hoare annotation was computed. [2020-12-09 17:26:08,752 INFO L262 CegarLoopResult]: For program point L316(lines 316 400) no Hoare annotation was computed. [2020-12-09 17:26:08,752 INFO L262 CegarLoopResult]: For program point L283(lines 283 400) no Hoare annotation was computed. [2020-12-09 17:26:08,752 INFO L262 CegarLoopResult]: For program point L118(lines 118 400) no Hoare annotation was computed. [2020-12-09 17:26:08,752 INFO L262 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-12-09 17:26:08,753 INFO L262 CegarLoopResult]: For program point L218(lines 218 400) no Hoare annotation was computed. [2020-12-09 17:26:08,753 INFO L262 CegarLoopResult]: For program point L53(lines 53 400) no Hoare annotation was computed. [2020-12-09 17:26:08,753 INFO L262 CegarLoopResult]: For program point L154(lines 154 400) no Hoare annotation was computed. [2020-12-09 17:26:08,753 INFO L258 CegarLoopResult]: At program point L584(lines 40 585) the Hoare annotation is: (let ((.cse6 (<= ~a7~0 0)) (.cse2 (= ~a20~0 1)) (.cse3 (<= ~a8~0 14)) (.cse5 (= ~a21~0 1)) (.cse4 (= ~a7~0 1)) (.cse0 (<= ~a16~0 5)) (.cse7 (<= ~a20~0 0))) (or (and (let ((.cse1 (<= ~a21~0 0))) (or (and .cse0 .cse1 (= ~a17~0 1)) (and .cse2 .cse1))) .cse3 .cse4) (and .cse5 (= ~a16~0 6) .cse6 .cse7) (and .cse3 .cse5 .cse2) (and .cse5 .cse0 .cse6 .cse7) (and .cse5 .cse6 .cse2) (and .cse3 .cse5 .cse0 .cse7) (and .cse5 .cse4 .cse0 .cse7))) [2020-12-09 17:26:08,753 INFO L262 CegarLoopResult]: For program point L188(lines 188 400) no Hoare annotation was computed. [2020-12-09 17:26:08,753 INFO L262 CegarLoopResult]: For program point L387(lines 387 400) no Hoare annotation was computed. [2020-12-09 17:26:08,753 INFO L262 CegarLoopResult]: For program point L288(lines 288 400) no Hoare annotation was computed. [2020-12-09 17:26:08,753 INFO L262 CegarLoopResult]: For program point L255(lines 255 400) no Hoare annotation was computed. [2020-12-09 17:26:08,753 INFO L262 CegarLoopResult]: For program point L90(lines 90 400) no Hoare annotation was computed. [2020-12-09 17:26:08,754 INFO L262 CegarLoopResult]: For program point L355(lines 355 400) no Hoare annotation was computed. [2020-12-09 17:26:08,754 INFO L262 CegarLoopResult]: For program point L322(lines 322 400) no Hoare annotation was computed. [2020-12-09 17:26:08,754 INFO L262 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-12-09 17:26:08,754 INFO L262 CegarLoopResult]: For program point L124(lines 124 400) no Hoare annotation was computed. [2020-12-09 17:26:08,754 INFO L265 CegarLoopResult]: At program point L587(lines 587 604) the Hoare annotation is: true [2020-12-09 17:26:08,754 INFO L262 CegarLoopResult]: For program point L224(lines 224 400) no Hoare annotation was computed. [2020-12-09 17:26:08,754 INFO L262 CegarLoopResult]: For program point L158(lines 158 400) no Hoare annotation was computed. [2020-12-09 17:26:08,754 INFO L262 CegarLoopResult]: For program point L59(lines 59 400) no Hoare annotation was computed. [2020-12-09 17:26:08,754 INFO L262 CegarLoopResult]: For program point L94(lines 94 400) no Hoare annotation was computed. [2020-12-09 17:26:08,754 INFO L262 CegarLoopResult]: For program point L392(lines 392 400) no Hoare annotation was computed. [2020-12-09 17:26:08,754 INFO L262 CegarLoopResult]: For program point L326(lines 326 400) no Hoare annotation was computed. [2020-12-09 17:26:08,754 INFO L262 CegarLoopResult]: For program point L260(lines 260 400) no Hoare annotation was computed. [2020-12-09 17:26:08,754 INFO L262 CegarLoopResult]: For program point L228(lines 228 400) no Hoare annotation was computed. [2020-12-09 17:26:08,754 INFO L262 CegarLoopResult]: For program point L162(lines 162 400) no Hoare annotation was computed. [2020-12-09 17:26:08,754 INFO L262 CegarLoopResult]: For program point L129(lines 129 400) no Hoare annotation was computed. [2020-12-09 17:26:08,755 INFO L262 CegarLoopResult]: For program point L328(lines 328 400) no Hoare annotation was computed. [2020-12-09 17:26:08,755 INFO L262 CegarLoopResult]: For program point L196(lines 196 400) no Hoare annotation was computed. [2020-12-09 17:26:08,755 INFO L262 CegarLoopResult]: For program point L64(lines 64 400) no Hoare annotation was computed. [2020-12-09 17:26:08,755 INFO L258 CegarLoopResult]: At program point L593-2(lines 593 603) the Hoare annotation is: (let ((.cse6 (<= ~a7~0 0)) (.cse2 (= ~a20~0 1)) (.cse3 (<= ~a8~0 14)) (.cse5 (= ~a21~0 1)) (.cse4 (= ~a7~0 1)) (.cse0 (<= ~a16~0 5)) (.cse7 (<= ~a20~0 0))) (or (and (let ((.cse1 (<= ~a21~0 0))) (or (and .cse0 .cse1 (= ~a17~0 1)) (and .cse2 .cse1))) .cse3 .cse4) (and .cse5 (= ~a16~0 6) .cse6 .cse7) (and .cse3 .cse5 .cse2) (and .cse5 .cse0 .cse6 .cse7) (and .cse5 .cse6 .cse2) (and .cse3 .cse5 .cse0 .cse7) (and .cse5 .cse4 .cse0 .cse7))) [2020-12-09 17:26:08,755 INFO L262 CegarLoopResult]: For program point L296(lines 296 400) no Hoare annotation was computed. [2020-12-09 17:26:08,755 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 480) no Hoare annotation was computed. [2020-12-09 17:26:08,755 INFO L262 CegarLoopResult]: For program point L363(lines 363 400) no Hoare annotation was computed. [2020-12-09 17:26:08,755 INFO L262 CegarLoopResult]: For program point L199(lines 199 400) no Hoare annotation was computed. [2020-12-09 17:26:08,755 INFO L262 CegarLoopResult]: For program point L365(lines 365 400) no Hoare annotation was computed. [2020-12-09 17:26:08,755 INFO L262 CegarLoopResult]: For program point L266(lines 266 400) no Hoare annotation was computed. [2020-12-09 17:26:08,755 INFO L262 CegarLoopResult]: For program point L233(lines 233 400) no Hoare annotation was computed. [2020-12-09 17:26:08,755 INFO L262 CegarLoopResult]: For program point L134(lines 134 400) no Hoare annotation was computed. [2020-12-09 17:26:08,775 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 05:26:08 BoogieIcfgContainer [2020-12-09 17:26:08,775 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 17:26:08,775 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 17:26:08,775 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 17:26:08,775 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 17:26:08,776 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 05:26:01" (3/4) ... [2020-12-09 17:26:08,779 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-09 17:26:08,799 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 103 nodes and edges [2020-12-09 17:26:08,800 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 19 nodes and edges [2020-12-09 17:26:08,801 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2020-12-09 17:26:08,803 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-12-09 17:26:08,892 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_68823152-52ec-4d1f-89e7-0f4e2805892d/bin/utaipan/witness.graphml [2020-12-09 17:26:08,892 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 17:26:08,893 INFO L168 Benchmark]: Toolchain (without parser) took 9071.35 ms. Allocated memory was 127.9 MB in the beginning and 325.1 MB in the end (delta: 197.1 MB). Free memory was 89.9 MB in the beginning and 212.7 MB in the end (delta: -122.8 MB). Peak memory consumption was 74.9 MB. Max. memory is 16.1 GB. [2020-12-09 17:26:08,894 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 127.9 MB. Free memory is still 108.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 17:26:08,894 INFO L168 Benchmark]: CACSL2BoogieTranslator took 360.11 ms. Allocated memory is still 127.9 MB. Free memory was 89.6 MB in the beginning and 86.4 MB in the end (delta: 3.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-12-09 17:26:08,894 INFO L168 Benchmark]: Boogie Procedure Inliner took 62.11 ms. Allocated memory is still 127.9 MB. Free memory was 86.4 MB in the beginning and 80.6 MB in the end (delta: 5.8 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2020-12-09 17:26:08,894 INFO L168 Benchmark]: Boogie Preprocessor took 44.53 ms. Allocated memory is still 127.9 MB. Free memory was 80.6 MB in the beginning and 76.4 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-12-09 17:26:08,895 INFO L168 Benchmark]: RCFGBuilder took 1217.07 ms. Allocated memory was 127.9 MB in the beginning and 155.2 MB in the end (delta: 27.3 MB). Free memory was 75.8 MB in the beginning and 115.4 MB in the end (delta: -39.5 MB). Peak memory consumption was 56.0 MB. Max. memory is 16.1 GB. [2020-12-09 17:26:08,895 INFO L168 Benchmark]: TraceAbstraction took 7264.85 ms. Allocated memory was 155.2 MB in the beginning and 325.1 MB in the end (delta: 169.9 MB). Free memory was 114.3 MB in the beginning and 228.6 MB in the end (delta: -114.3 MB). Peak memory consumption was 186.7 MB. Max. memory is 16.1 GB. [2020-12-09 17:26:08,895 INFO L168 Benchmark]: Witness Printer took 117.32 ms. Allocated memory is still 325.1 MB. Free memory was 228.6 MB in the beginning and 212.7 MB in the end (delta: 15.9 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2020-12-09 17:26:08,896 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 127.9 MB. Free memory is still 108.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 360.11 ms. Allocated memory is still 127.9 MB. Free memory was 89.6 MB in the beginning and 86.4 MB in the end (delta: 3.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 62.11 ms. Allocated memory is still 127.9 MB. Free memory was 86.4 MB in the beginning and 80.6 MB in the end (delta: 5.8 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 44.53 ms. Allocated memory is still 127.9 MB. Free memory was 80.6 MB in the beginning and 76.4 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1217.07 ms. Allocated memory was 127.9 MB in the beginning and 155.2 MB in the end (delta: 27.3 MB). Free memory was 75.8 MB in the beginning and 115.4 MB in the end (delta: -39.5 MB). Peak memory consumption was 56.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 7264.85 ms. Allocated memory was 155.2 MB in the beginning and 325.1 MB in the end (delta: 169.9 MB). Free memory was 114.3 MB in the beginning and 228.6 MB in the end (delta: -114.3 MB). Peak memory consumption was 186.7 MB. Max. memory is 16.1 GB. * Witness Printer took 117.32 ms. Allocated memory is still 325.1 MB. Free memory was 228.6 MB in the beginning and 212.7 MB in the end (delta: 15.9 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 480]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 40]: Loop Invariant Derived loop invariant: ((((((((((a16 <= 5 && a21 <= 0) && a17 == 1) || (a20 == 1 && a21 <= 0)) && a8 <= 14) && a7 == 1) || (((a21 == 1 && a16 == 6) && a7 <= 0) && a20 <= 0)) || ((a8 <= 14 && a21 == 1) && a20 == 1)) || (((a21 == 1 && a16 <= 5) && a7 <= 0) && a20 <= 0)) || ((a21 == 1 && a7 <= 0) && a20 == 1)) || (((a8 <= 14 && a21 == 1) && a16 <= 5) && a20 <= 0)) || (((a21 == 1 && a7 == 1) && a16 <= 5) && a20 <= 0) - InvariantResult [Line: 587]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 593]: Loop Invariant Derived loop invariant: ((((((((((a16 <= 5 && a21 <= 0) && a17 == 1) || (a20 == 1 && a21 <= 0)) && a8 <= 14) && a7 == 1) || (((a21 == 1 && a16 == 6) && a7 <= 0) && a20 <= 0)) || ((a8 <= 14 && a21 == 1) && a20 == 1)) || (((a21 == 1 && a16 <= 5) && a7 <= 0) && a20 <= 0)) || ((a21 == 1 && a7 <= 0) && a20 == 1)) || (((a8 <= 14 && a21 == 1) && a16 <= 5) && a20 <= 0)) || (((a21 == 1 && a7 == 1) && a16 <= 5) && a20 <= 0) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 76 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 6.8s, OverallIterations: 13, TraceHistogramMax: 7, AutomataDifference: 3.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 779 SDtfs, 1020 SDslu, 59 SDs, 0 SdLazy, 2935 SolverSat, 673 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1026 GetRequests, 999 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1352occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 13 MinimizatonAttempts, 710 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 43 NumberOfFragments, 197 HoareAnnotationTreeSize, 3 FomulaSimplifications, 2140 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 604 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 2205 NumberOfCodeBlocks, 2205 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 2682 ConstructedInterpolants, 0 QuantifiedInterpolants, 1372771 SizeOfPredicates, 0 NumberOfNonLiveVariables, 1161 ConjunctsInSsa, 6 ConjunctsInUnsatCore, 19 InterpolantComputations, 16 PerfectInterpolantSequences, 2263/2371 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...