./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem01_label41.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91585849-56f8-4882-a995-78d5ad23d029/bin/utaipan-tZwUujhuQw/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91585849-56f8-4882-a995-78d5ad23d029/bin/utaipan-tZwUujhuQw/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91585849-56f8-4882-a995-78d5ad23d029/bin/utaipan-tZwUujhuQw/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91585849-56f8-4882-a995-78d5ad23d029/bin/utaipan-tZwUujhuQw/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem01_label41.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91585849-56f8-4882-a995-78d5ad23d029/bin/utaipan-tZwUujhuQw/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91585849-56f8-4882-a995-78d5ad23d029/bin/utaipan-tZwUujhuQw --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 91ebea43abc6271e81b3eed447826b716b76bbe82349fcd855bbd6d5636a25a9 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-e943c26 [2021-10-20 05:31:03,019 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-20 05:31:03,022 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-20 05:31:03,062 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-20 05:31:03,063 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-20 05:31:03,065 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-20 05:31:03,067 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-20 05:31:03,070 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-20 05:31:03,073 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-20 05:31:03,074 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-20 05:31:03,076 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-20 05:31:03,077 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-20 05:31:03,078 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-20 05:31:03,080 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-20 05:31:03,082 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-20 05:31:03,083 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-20 05:31:03,085 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-20 05:31:03,090 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-20 05:31:03,099 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-20 05:31:03,104 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-20 05:31:03,106 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-20 05:31:03,111 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-20 05:31:03,113 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-20 05:31:03,115 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-20 05:31:03,123 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-20 05:31:03,128 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-20 05:31:03,129 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-20 05:31:03,130 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-20 05:31:03,133 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-20 05:31:03,135 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-20 05:31:03,136 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-20 05:31:03,137 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-20 05:31:03,139 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-20 05:31:03,141 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-20 05:31:03,143 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-20 05:31:03,143 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-20 05:31:03,144 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-20 05:31:03,145 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-20 05:31:03,145 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-20 05:31:03,146 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-20 05:31:03,147 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-20 05:31:03,148 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91585849-56f8-4882-a995-78d5ad23d029/bin/utaipan-tZwUujhuQw/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-20 05:31:03,198 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-20 05:31:03,198 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-20 05:31:03,200 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-20 05:31:03,200 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-20 05:31:03,200 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-20 05:31:03,201 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-20 05:31:03,201 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-20 05:31:03,208 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-20 05:31:03,208 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-20 05:31:03,208 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-20 05:31:03,210 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-20 05:31:03,210 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-20 05:31:03,210 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-20 05:31:03,211 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-20 05:31:03,211 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-20 05:31:03,212 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-20 05:31:03,212 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-20 05:31:03,212 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-20 05:31:03,212 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-20 05:31:03,213 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-20 05:31:03,213 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-20 05:31:03,213 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-20 05:31:03,213 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-20 05:31:03,214 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-20 05:31:03,214 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-20 05:31:03,214 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-20 05:31:03,214 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-20 05:31:03,214 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-20 05:31:03,215 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-20 05:31:03,217 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-20 05:31:03,217 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-20 05:31:03,217 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-20 05:31:03,218 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-20 05:31:03,218 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-20 05:31:03,218 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-20 05:31:03,219 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-20 05:31:03,219 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-20 05:31:03,219 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-20 05:31:03,219 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-20 05:31:03,219 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_worker_vcloud-master_on_vcloud-master/run_dir_91585849-56f8-4882-a995-78d5ad23d029/bin/utaipan-tZwUujhuQw/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91585849-56f8-4882-a995-78d5ad23d029/bin/utaipan-tZwUujhuQw Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 91ebea43abc6271e81b3eed447826b716b76bbe82349fcd855bbd6d5636a25a9 [2021-10-20 05:31:03,601 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-20 05:31:03,642 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-20 05:31:03,646 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-20 05:31:03,647 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-20 05:31:03,648 INFO L275 PluginConnector]: CDTParser initialized [2021-10-20 05:31:03,649 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91585849-56f8-4882-a995-78d5ad23d029/bin/utaipan-tZwUujhuQw/../../sv-benchmarks/c/eca-rers2012/Problem01_label41.c [2021-10-20 05:31:03,732 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91585849-56f8-4882-a995-78d5ad23d029/bin/utaipan-tZwUujhuQw/data/4cd2b49e3/2883de5d3e334e9792d5ef3970d3cb8d/FLAGa78212d7a [2021-10-20 05:31:04,454 INFO L306 CDTParser]: Found 1 translation units. [2021-10-20 05:31:04,455 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91585849-56f8-4882-a995-78d5ad23d029/sv-benchmarks/c/eca-rers2012/Problem01_label41.c [2021-10-20 05:31:04,483 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91585849-56f8-4882-a995-78d5ad23d029/bin/utaipan-tZwUujhuQw/data/4cd2b49e3/2883de5d3e334e9792d5ef3970d3cb8d/FLAGa78212d7a [2021-10-20 05:31:04,624 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91585849-56f8-4882-a995-78d5ad23d029/bin/utaipan-tZwUujhuQw/data/4cd2b49e3/2883de5d3e334e9792d5ef3970d3cb8d [2021-10-20 05:31:04,627 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-20 05:31:04,629 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-20 05:31:04,632 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-20 05:31:04,632 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-20 05:31:04,636 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-20 05:31:04,637 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 05:31:04" (1/1) ... [2021-10-20 05:31:04,639 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25bae0a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:31:04, skipping insertion in model container [2021-10-20 05:31:04,639 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 05:31:04" (1/1) ... [2021-10-20 05:31:04,649 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-20 05:31:04,741 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-20 05:31:05,140 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91585849-56f8-4882-a995-78d5ad23d029/sv-benchmarks/c/eca-rers2012/Problem01_label41.c[16127,16140] [2021-10-20 05:31:05,239 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-20 05:31:05,250 INFO L203 MainTranslator]: Completed pre-run [2021-10-20 05:31:05,386 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91585849-56f8-4882-a995-78d5ad23d029/sv-benchmarks/c/eca-rers2012/Problem01_label41.c[16127,16140] [2021-10-20 05:31:05,416 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-20 05:31:05,434 INFO L208 MainTranslator]: Completed translation [2021-10-20 05:31:05,435 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:31:05 WrapperNode [2021-10-20 05:31:05,435 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-20 05:31:05,436 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-20 05:31:05,437 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-20 05:31:05,437 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-20 05:31:05,446 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:31:05" (1/1) ... [2021-10-20 05:31:05,472 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:31:05" (1/1) ... [2021-10-20 05:31:05,558 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-20 05:31:05,559 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-20 05:31:05,559 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-20 05:31:05,559 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-20 05:31:05,586 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:31:05" (1/1) ... [2021-10-20 05:31:05,586 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:31:05" (1/1) ... [2021-10-20 05:31:05,601 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:31:05" (1/1) ... [2021-10-20 05:31:05,602 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:31:05" (1/1) ... [2021-10-20 05:31:05,658 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:31:05" (1/1) ... [2021-10-20 05:31:05,670 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:31:05" (1/1) ... [2021-10-20 05:31:05,675 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:31:05" (1/1) ... [2021-10-20 05:31:05,683 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-20 05:31:05,684 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-20 05:31:05,684 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-20 05:31:05,685 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-20 05:31:05,688 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:31:05" (1/1) ... [2021-10-20 05:31:05,699 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-20 05:31:05,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91585849-56f8-4882-a995-78d5ad23d029/bin/utaipan-tZwUujhuQw/z3 [2021-10-20 05:31:05,734 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91585849-56f8-4882-a995-78d5ad23d029/bin/utaipan-tZwUujhuQw/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-20 05:31:05,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91585849-56f8-4882-a995-78d5ad23d029/bin/utaipan-tZwUujhuQw/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-20 05:31:05,795 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-20 05:31:05,795 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-20 05:31:05,797 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-20 05:31:05,798 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-20 05:31:08,112 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-20 05:31:08,113 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-20 05:31:08,116 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 05:31:08 BoogieIcfgContainer [2021-10-20 05:31:08,116 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-20 05:31:08,119 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-20 05:31:08,119 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-20 05:31:08,124 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-20 05:31:08,124 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 05:31:04" (1/3) ... [2021-10-20 05:31:08,126 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26364939 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 05:31:08, skipping insertion in model container [2021-10-20 05:31:08,126 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:31:05" (2/3) ... [2021-10-20 05:31:08,127 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26364939 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 05:31:08, skipping insertion in model container [2021-10-20 05:31:08,127 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 05:31:08" (3/3) ... [2021-10-20 05:31:08,130 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem01_label41.c [2021-10-20 05:31:08,137 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-20 05:31:08,137 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-20 05:31:08,217 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-20 05:31:08,226 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-20 05:31:08,227 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-20 05:31:08,247 INFO L276 IsEmpty]: Start isEmpty. Operand has 76 states, 74 states have (on average 1.945945945945946) internal successors, (144), 75 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:31:08,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-10-20 05:31:08,257 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:31:08,258 INFO L512 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] [2021-10-20 05:31:08,259 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-20 05:31:08,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:31:08,266 INFO L82 PathProgramCache]: Analyzing trace with hash 379009470, now seen corresponding path program 1 times [2021-10-20 05:31:08,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:31:08,279 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626955298] [2021-10-20 05:31:08,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:31:08,280 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:31:08,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:31:08,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 05:31:08,860 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 05:31:08,860 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626955298] [2021-10-20 05:31:08,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626955298] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 05:31:08,861 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:31:08,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-20 05:31:08,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515610188] [2021-10-20 05:31:08,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-20 05:31:08,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 05:31:08,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-20 05:31:08,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-20 05:31:08,891 INFO L87 Difference]: Start difference. First operand has 76 states, 74 states have (on average 1.945945945945946) internal successors, (144), 75 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:31:09,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:31:09,337 INFO L93 Difference]: Finished difference Result 224 states and 428 transitions. [2021-10-20 05:31:09,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-20 05:31:09,340 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-10-20 05:31:09,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:31:09,354 INFO L225 Difference]: With dead ends: 224 [2021-10-20 05:31:09,354 INFO L226 Difference]: Without dead ends: 145 [2021-10-20 05:31:09,358 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-20 05:31:09,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-10-20 05:31:09,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-10-20 05:31:09,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.8402777777777777) internal successors, (265), 144 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:31:09,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 265 transitions. [2021-10-20 05:31:09,437 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 265 transitions. Word has length 71 [2021-10-20 05:31:09,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:31:09,441 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 265 transitions. [2021-10-20 05:31:09,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:31:09,442 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 265 transitions. [2021-10-20 05:31:09,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-10-20 05:31:09,451 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:31:09,451 INFO L512 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] [2021-10-20 05:31:09,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-20 05:31:09,452 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-20 05:31:09,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:31:09,453 INFO L82 PathProgramCache]: Analyzing trace with hash -615352239, now seen corresponding path program 1 times [2021-10-20 05:31:09,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:31:09,454 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996805442] [2021-10-20 05:31:09,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:31:09,454 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:31:09,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:31:09,569 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 05:31:09,569 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 05:31:09,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996805442] [2021-10-20 05:31:09,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996805442] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 05:31:09,570 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:31:09,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-20 05:31:09,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285856411] [2021-10-20 05:31:09,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-20 05:31:09,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 05:31:09,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-20 05:31:09,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-20 05:31:09,575 INFO L87 Difference]: Start difference. First operand 145 states and 265 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:31:09,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:31:09,997 INFO L93 Difference]: Finished difference Result 431 states and 792 transitions. [2021-10-20 05:31:09,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-20 05:31:09,998 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-10-20 05:31:09,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:31:10,001 INFO L225 Difference]: With dead ends: 431 [2021-10-20 05:31:10,001 INFO L226 Difference]: Without dead ends: 287 [2021-10-20 05:31:10,003 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-20 05:31:10,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-10-20 05:31:10,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 287. [2021-10-20 05:31:10,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 1.6958041958041958) internal successors, (485), 286 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:31:10,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 485 transitions. [2021-10-20 05:31:10,026 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 485 transitions. Word has length 77 [2021-10-20 05:31:10,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:31:10,026 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 485 transitions. [2021-10-20 05:31:10,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:31:10,027 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 485 transitions. [2021-10-20 05:31:10,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-10-20 05:31:10,031 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:31:10,031 INFO L512 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 05:31:10,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-20 05:31:10,032 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-20 05:31:10,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:31:10,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1344575438, now seen corresponding path program 1 times [2021-10-20 05:31:10,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:31:10,034 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115928422] [2021-10-20 05:31:10,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:31:10,034 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:31:10,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:31:10,150 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 05:31:10,151 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 05:31:10,151 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115928422] [2021-10-20 05:31:10,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115928422] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 05:31:10,152 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:31:10,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-20 05:31:10,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696271064] [2021-10-20 05:31:10,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-20 05:31:10,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 05:31:10,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-20 05:31:10,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-20 05:31:10,165 INFO L87 Difference]: Start difference. First operand 287 states and 485 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:31:10,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:31:10,547 INFO L93 Difference]: Finished difference Result 857 states and 1452 transitions. [2021-10-20 05:31:10,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-20 05:31:10,548 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-10-20 05:31:10,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:31:10,552 INFO L225 Difference]: With dead ends: 857 [2021-10-20 05:31:10,553 INFO L226 Difference]: Without dead ends: 571 [2021-10-20 05:31:10,555 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-20 05:31:10,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-10-20 05:31:10,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 571. [2021-10-20 05:31:10,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 570 states have (on average 1.5701754385964912) internal successors, (895), 570 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:31:10,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 895 transitions. [2021-10-20 05:31:10,587 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 895 transitions. Word has length 92 [2021-10-20 05:31:10,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:31:10,588 INFO L470 AbstractCegarLoop]: Abstraction has 571 states and 895 transitions. [2021-10-20 05:31:10,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:31:10,588 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 895 transitions. [2021-10-20 05:31:10,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-10-20 05:31:10,594 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:31:10,594 INFO L512 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 05:31:10,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-20 05:31:10,595 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-20 05:31:10,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:31:10,595 INFO L82 PathProgramCache]: Analyzing trace with hash -1933841620, now seen corresponding path program 1 times [2021-10-20 05:31:10,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:31:10,596 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928637247] [2021-10-20 05:31:10,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:31:10,596 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:31:10,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:31:10,709 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-20 05:31:10,710 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 05:31:10,710 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928637247] [2021-10-20 05:31:10,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928637247] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 05:31:10,711 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:31:10,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-20 05:31:10,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309025453] [2021-10-20 05:31:10,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-20 05:31:10,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 05:31:10,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-20 05:31:10,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-20 05:31:10,714 INFO L87 Difference]: Start difference. First operand 571 states and 895 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:31:11,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:31:11,189 INFO L93 Difference]: Finished difference Result 1354 states and 2147 transitions. [2021-10-20 05:31:11,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-20 05:31:11,190 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-10-20 05:31:11,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:31:11,195 INFO L225 Difference]: With dead ends: 1354 [2021-10-20 05:31:11,195 INFO L226 Difference]: Without dead ends: 784 [2021-10-20 05:31:11,197 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-20 05:31:11,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 784 states. [2021-10-20 05:31:11,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 784 to 571. [2021-10-20 05:31:11,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 570 states have (on average 1.5614035087719298) internal successors, (890), 570 states have internal predecessors, (890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:31:11,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 890 transitions. [2021-10-20 05:31:11,234 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 890 transitions. Word has length 105 [2021-10-20 05:31:11,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:31:11,235 INFO L470 AbstractCegarLoop]: Abstraction has 571 states and 890 transitions. [2021-10-20 05:31:11,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:31:11,235 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 890 transitions. [2021-10-20 05:31:11,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-10-20 05:31:11,238 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:31:11,238 INFO L512 BasicCegarLoop]: trace histogram [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, 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] [2021-10-20 05:31:11,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-20 05:31:11,239 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-20 05:31:11,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:31:11,240 INFO L82 PathProgramCache]: Analyzing trace with hash 218729974, now seen corresponding path program 1 times [2021-10-20 05:31:11,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:31:11,240 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486219176] [2021-10-20 05:31:11,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:31:11,241 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:31:11,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:31:11,338 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-10-20 05:31:11,339 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 05:31:11,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486219176] [2021-10-20 05:31:11,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486219176] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 05:31:11,339 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:31:11,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-20 05:31:11,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543255283] [2021-10-20 05:31:11,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-20 05:31:11,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 05:31:11,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-20 05:31:11,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-20 05:31:11,341 INFO L87 Difference]: Start difference. First operand 571 states and 890 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:31:11,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:31:11,749 INFO L93 Difference]: Finished difference Result 1425 states and 2189 transitions. [2021-10-20 05:31:11,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-20 05:31:11,750 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2021-10-20 05:31:11,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:31:11,756 INFO L225 Difference]: With dead ends: 1425 [2021-10-20 05:31:11,757 INFO L226 Difference]: Without dead ends: 855 [2021-10-20 05:31:11,758 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-20 05:31:11,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2021-10-20 05:31:11,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 713. [2021-10-20 05:31:11,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 713 states, 712 states have (on average 1.5) internal successors, (1068), 712 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:31:11,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 1068 transitions. [2021-10-20 05:31:11,790 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 1068 transitions. Word has length 109 [2021-10-20 05:31:11,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:31:11,791 INFO L470 AbstractCegarLoop]: Abstraction has 713 states and 1068 transitions. [2021-10-20 05:31:11,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:31:11,792 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 1068 transitions. [2021-10-20 05:31:11,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-10-20 05:31:11,795 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:31:11,795 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 05:31:11,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-20 05:31:11,796 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-20 05:31:11,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:31:11,797 INFO L82 PathProgramCache]: Analyzing trace with hash -692397588, now seen corresponding path program 1 times [2021-10-20 05:31:11,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:31:11,797 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171643448] [2021-10-20 05:31:11,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:31:11,798 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:31:11,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:31:11,888 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-10-20 05:31:11,891 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 05:31:11,892 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171643448] [2021-10-20 05:31:11,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171643448] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 05:31:11,893 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:31:11,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-20 05:31:11,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938283574] [2021-10-20 05:31:11,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-20 05:31:11,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 05:31:11,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-20 05:31:11,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-20 05:31:11,902 INFO L87 Difference]: Start difference. First operand 713 states and 1068 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:31:12,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:31:12,357 INFO L93 Difference]: Finished difference Result 1780 states and 2616 transitions. [2021-10-20 05:31:12,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-20 05:31:12,358 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 122 [2021-10-20 05:31:12,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:31:12,366 INFO L225 Difference]: With dead ends: 1780 [2021-10-20 05:31:12,366 INFO L226 Difference]: Without dead ends: 1068 [2021-10-20 05:31:12,368 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-20 05:31:12,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1068 states. [2021-10-20 05:31:12,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1068 to 855. [2021-10-20 05:31:12,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 855 states, 854 states have (on average 1.4519906323185012) internal successors, (1240), 854 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:31:12,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 855 states to 855 states and 1240 transitions. [2021-10-20 05:31:12,412 INFO L78 Accepts]: Start accepts. Automaton has 855 states and 1240 transitions. Word has length 122 [2021-10-20 05:31:12,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:31:12,412 INFO L470 AbstractCegarLoop]: Abstraction has 855 states and 1240 transitions. [2021-10-20 05:31:12,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:31:12,413 INFO L276 IsEmpty]: Start isEmpty. Operand 855 states and 1240 transitions. [2021-10-20 05:31:12,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-10-20 05:31:12,417 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:31:12,418 INFO L512 BasicCegarLoop]: trace histogram [4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 05:31:12,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-20 05:31:12,418 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-20 05:31:12,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:31:12,419 INFO L82 PathProgramCache]: Analyzing trace with hash 2030922133, now seen corresponding path program 1 times [2021-10-20 05:31:12,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:31:12,420 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803774942] [2021-10-20 05:31:12,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:31:12,421 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:31:12,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:31:12,513 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-10-20 05:31:12,513 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 05:31:12,514 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803774942] [2021-10-20 05:31:12,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803774942] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 05:31:12,515 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:31:12,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-20 05:31:12,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917373377] [2021-10-20 05:31:12,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-20 05:31:12,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 05:31:12,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-20 05:31:12,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-20 05:31:12,518 INFO L87 Difference]: Start difference. First operand 855 states and 1240 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:31:12,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:31:12,921 INFO L93 Difference]: Finished difference Result 1851 states and 2699 transitions. [2021-10-20 05:31:12,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-20 05:31:12,921 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 124 [2021-10-20 05:31:12,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:31:12,929 INFO L225 Difference]: With dead ends: 1851 [2021-10-20 05:31:12,930 INFO L226 Difference]: Without dead ends: 997 [2021-10-20 05:31:12,932 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-20 05:31:12,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2021-10-20 05:31:12,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 926. [2021-10-20 05:31:12,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 926 states, 925 states have (on average 1.4367567567567567) internal successors, (1329), 925 states have internal predecessors, (1329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:31:12,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 1329 transitions. [2021-10-20 05:31:12,970 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 1329 transitions. Word has length 124 [2021-10-20 05:31:12,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:31:12,971 INFO L470 AbstractCegarLoop]: Abstraction has 926 states and 1329 transitions. [2021-10-20 05:31:12,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:31:12,971 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 1329 transitions. [2021-10-20 05:31:12,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-10-20 05:31:12,976 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:31:12,977 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 05:31:12,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-20 05:31:12,979 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-20 05:31:12,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:31:12,980 INFO L82 PathProgramCache]: Analyzing trace with hash -1951034433, now seen corresponding path program 1 times [2021-10-20 05:31:12,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:31:12,981 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573506109] [2021-10-20 05:31:12,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:31:12,981 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:31:13,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:31:13,094 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-10-20 05:31:13,095 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 05:31:13,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573506109] [2021-10-20 05:31:13,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573506109] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 05:31:13,096 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:31:13,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-20 05:31:13,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221101588] [2021-10-20 05:31:13,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-20 05:31:13,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 05:31:13,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-20 05:31:13,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-20 05:31:13,099 INFO L87 Difference]: Start difference. First operand 926 states and 1329 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:31:13,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:31:13,511 INFO L93 Difference]: Finished difference Result 1993 states and 2823 transitions. [2021-10-20 05:31:13,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-20 05:31:13,511 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-10-20 05:31:13,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:31:13,519 INFO L225 Difference]: With dead ends: 1993 [2021-10-20 05:31:13,519 INFO L226 Difference]: Without dead ends: 1068 [2021-10-20 05:31:13,521 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-20 05:31:13,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1068 states. [2021-10-20 05:31:13,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1068 to 997. [2021-10-20 05:31:13,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 997 states, 996 states have (on average 1.4056224899598393) internal successors, (1400), 996 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:31:13,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 997 states to 997 states and 1400 transitions. [2021-10-20 05:31:13,557 INFO L78 Accepts]: Start accepts. Automaton has 997 states and 1400 transitions. Word has length 140 [2021-10-20 05:31:13,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:31:13,557 INFO L470 AbstractCegarLoop]: Abstraction has 997 states and 1400 transitions. [2021-10-20 05:31:13,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:31:13,558 INFO L276 IsEmpty]: Start isEmpty. Operand 997 states and 1400 transitions. [2021-10-20 05:31:13,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-10-20 05:31:13,562 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:31:13,562 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 05:31:13,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-20 05:31:13,563 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-20 05:31:13,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:31:13,563 INFO L82 PathProgramCache]: Analyzing trace with hash 1229069980, now seen corresponding path program 1 times [2021-10-20 05:31:13,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:31:13,564 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449976630] [2021-10-20 05:31:13,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:31:13,564 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:31:13,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:31:13,652 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-10-20 05:31:13,652 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 05:31:13,652 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449976630] [2021-10-20 05:31:13,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449976630] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 05:31:13,653 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:31:13,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-20 05:31:13,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474846324] [2021-10-20 05:31:13,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-20 05:31:13,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 05:31:13,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-20 05:31:13,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-20 05:31:13,655 INFO L87 Difference]: Start difference. First operand 997 states and 1400 transitions. Second operand has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:31:14,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:31:14,242 INFO L93 Difference]: Finished difference Result 2490 states and 3459 transitions. [2021-10-20 05:31:14,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-20 05:31:14,244 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 154 [2021-10-20 05:31:14,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:31:14,261 INFO L225 Difference]: With dead ends: 2490 [2021-10-20 05:31:14,261 INFO L226 Difference]: Without dead ends: 1423 [2021-10-20 05:31:14,270 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.4ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-20 05:31:14,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1423 states. [2021-10-20 05:31:14,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1423 to 1210. [2021-10-20 05:31:14,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1210 states, 1209 states have (on average 1.349875930521092) internal successors, (1632), 1209 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:31:14,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1210 states to 1210 states and 1632 transitions. [2021-10-20 05:31:14,318 INFO L78 Accepts]: Start accepts. Automaton has 1210 states and 1632 transitions. Word has length 154 [2021-10-20 05:31:14,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:31:14,319 INFO L470 AbstractCegarLoop]: Abstraction has 1210 states and 1632 transitions. [2021-10-20 05:31:14,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:31:14,320 INFO L276 IsEmpty]: Start isEmpty. Operand 1210 states and 1632 transitions. [2021-10-20 05:31:14,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-10-20 05:31:14,324 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:31:14,324 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 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, 3, 3, 3, 3, 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] [2021-10-20 05:31:14,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-20 05:31:14,326 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-20 05:31:14,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:31:14,327 INFO L82 PathProgramCache]: Analyzing trace with hash -1229155134, now seen corresponding path program 1 times [2021-10-20 05:31:14,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:31:14,329 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888296069] [2021-10-20 05:31:14,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:31:14,330 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:31:14,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:31:14,449 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 106 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-10-20 05:31:14,449 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 05:31:14,450 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888296069] [2021-10-20 05:31:14,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888296069] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 05:31:14,450 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:31:14,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-20 05:31:14,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669131197] [2021-10-20 05:31:14,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-20 05:31:14,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 05:31:14,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-20 05:31:14,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-20 05:31:14,453 INFO L87 Difference]: Start difference. First operand 1210 states and 1632 transitions. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:31:14,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:31:14,843 INFO L93 Difference]: Finished difference Result 2561 states and 3433 transitions. [2021-10-20 05:31:14,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-20 05:31:14,844 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 157 [2021-10-20 05:31:14,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:31:14,857 INFO L225 Difference]: With dead ends: 2561 [2021-10-20 05:31:14,858 INFO L226 Difference]: Without dead ends: 1352 [2021-10-20 05:31:14,860 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-20 05:31:14,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1352 states. [2021-10-20 05:31:14,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1352 to 1210. [2021-10-20 05:31:14,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1210 states, 1209 states have (on average 1.349875930521092) internal successors, (1632), 1209 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:31:14,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1210 states to 1210 states and 1632 transitions. [2021-10-20 05:31:14,917 INFO L78 Accepts]: Start accepts. Automaton has 1210 states and 1632 transitions. Word has length 157 [2021-10-20 05:31:14,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:31:14,919 INFO L470 AbstractCegarLoop]: Abstraction has 1210 states and 1632 transitions. [2021-10-20 05:31:14,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:31:14,919 INFO L276 IsEmpty]: Start isEmpty. Operand 1210 states and 1632 transitions. [2021-10-20 05:31:14,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-10-20 05:31:14,924 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:31:14,924 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-10-20 05:31:14,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-20 05:31:14,925 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-20 05:31:14,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:31:14,926 INFO L82 PathProgramCache]: Analyzing trace with hash -2145613825, now seen corresponding path program 1 times [2021-10-20 05:31:14,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:31:14,927 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166803364] [2021-10-20 05:31:14,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:31:14,928 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:31:14,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:31:15,049 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 119 proven. 11 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-10-20 05:31:15,049 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 05:31:15,050 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166803364] [2021-10-20 05:31:15,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166803364] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-20 05:31:15,050 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057696912] [2021-10-20 05:31:15,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:31:15,051 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-20 05:31:15,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91585849-56f8-4882-a995-78d5ad23d029/bin/utaipan-tZwUujhuQw/z3 [2021-10-20 05:31:15,053 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91585849-56f8-4882-a995-78d5ad23d029/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-20 05:31:15,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91585849-56f8-4882-a995-78d5ad23d029/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-20 05:31:15,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:31:15,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-20 05:31:15,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-20 05:31:15,917 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-10-20 05:31:15,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-20 05:31:16,464 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-10-20 05:31:16,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057696912] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-20 05:31:16,465 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-20 05:31:16,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 5 [2021-10-20 05:31:16,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400681824] [2021-10-20 05:31:16,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-20 05:31:16,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 05:31:16,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-20 05:31:16,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-20 05:31:16,468 INFO L87 Difference]: Start difference. First operand 1210 states and 1632 transitions. Second operand has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:31:16,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:31:16,810 INFO L93 Difference]: Finished difference Result 1425 states and 1883 transitions. [2021-10-20 05:31:16,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-20 05:31:16,810 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 171 [2021-10-20 05:31:16,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:31:16,820 INFO L225 Difference]: With dead ends: 1425 [2021-10-20 05:31:16,820 INFO L226 Difference]: Without dead ends: 1423 [2021-10-20 05:31:16,821 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 340 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.6ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-20 05:31:16,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1423 states. [2021-10-20 05:31:16,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1423 to 1139. [2021-10-20 05:31:16,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1139 states, 1138 states have (on average 1.334797891036907) internal successors, (1519), 1138 states have internal predecessors, (1519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:31:16,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1139 states to 1139 states and 1519 transitions. [2021-10-20 05:31:16,864 INFO L78 Accepts]: Start accepts. Automaton has 1139 states and 1519 transitions. Word has length 171 [2021-10-20 05:31:16,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:31:16,865 INFO L470 AbstractCegarLoop]: Abstraction has 1139 states and 1519 transitions. [2021-10-20 05:31:16,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:31:16,866 INFO L276 IsEmpty]: Start isEmpty. Operand 1139 states and 1519 transitions. [2021-10-20 05:31:16,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-10-20 05:31:16,870 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:31:16,870 INFO L512 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-10-20 05:31:16,916 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91585849-56f8-4882-a995-78d5ad23d029/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-10-20 05:31:17,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91585849-56f8-4882-a995-78d5ad23d029/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-10-20 05:31:17,085 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-20 05:31:17,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:31:17,086 INFO L82 PathProgramCache]: Analyzing trace with hash 1532612480, now seen corresponding path program 1 times [2021-10-20 05:31:17,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:31:17,086 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401488654] [2021-10-20 05:31:17,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:31:17,087 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:31:17,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:31:17,389 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 63 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 05:31:17,390 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 05:31:17,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401488654] [2021-10-20 05:31:17,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401488654] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-20 05:31:17,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886927219] [2021-10-20 05:31:17,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:31:17,391 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-20 05:31:17,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91585849-56f8-4882-a995-78d5ad23d029/bin/utaipan-tZwUujhuQw/z3 [2021-10-20 05:31:17,395 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91585849-56f8-4882-a995-78d5ad23d029/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-20 05:31:17,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91585849-56f8-4882-a995-78d5ad23d029/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-20 05:31:17,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:31:17,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-20 05:31:17,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-20 05:31:18,290 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 98 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-10-20 05:31:18,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-20 05:31:18,827 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 98 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-10-20 05:31:18,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886927219] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-20 05:31:18,827 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-20 05:31:18,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5] total 7 [2021-10-20 05:31:18,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446569786] [2021-10-20 05:31:18,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-20 05:31:18,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 05:31:18,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-20 05:31:18,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-20 05:31:18,830 INFO L87 Difference]: Start difference. First operand 1139 states and 1519 transitions. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:31:19,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:31:19,237 INFO L93 Difference]: Finished difference Result 2490 states and 3310 transitions. [2021-10-20 05:31:19,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-20 05:31:19,238 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-10-20 05:31:19,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:31:19,248 INFO L225 Difference]: With dead ends: 2490 [2021-10-20 05:31:19,248 INFO L226 Difference]: Without dead ends: 1352 [2021-10-20 05:31:19,250 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 347 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 50.5ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-20 05:31:19,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1352 states. [2021-10-20 05:31:19,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1352 to 1139. [2021-10-20 05:31:19,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1139 states, 1138 states have (on average 1.2926186291739894) internal successors, (1471), 1138 states have internal predecessors, (1471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:31:19,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1139 states to 1139 states and 1471 transitions. [2021-10-20 05:31:19,316 INFO L78 Accepts]: Start accepts. Automaton has 1139 states and 1471 transitions. Word has length 175 [2021-10-20 05:31:19,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:31:19,316 INFO L470 AbstractCegarLoop]: Abstraction has 1139 states and 1471 transitions. [2021-10-20 05:31:19,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:31:19,317 INFO L276 IsEmpty]: Start isEmpty. Operand 1139 states and 1471 transitions. [2021-10-20 05:31:19,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-10-20 05:31:19,320 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:31:19,321 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-10-20 05:31:19,366 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91585849-56f8-4882-a995-78d5ad23d029/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-20 05:31:19,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91585849-56f8-4882-a995-78d5ad23d029/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-20 05:31:19,543 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-20 05:31:19,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:31:19,543 INFO L82 PathProgramCache]: Analyzing trace with hash -937112400, now seen corresponding path program 1 times [2021-10-20 05:31:19,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:31:19,544 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460590016] [2021-10-20 05:31:19,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:31:19,544 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:31:19,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:31:19,641 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 125 proven. 11 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-10-20 05:31:19,641 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 05:31:19,642 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460590016] [2021-10-20 05:31:19,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460590016] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-20 05:31:19,642 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569299292] [2021-10-20 05:31:19,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:31:19,643 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-20 05:31:19,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91585849-56f8-4882-a995-78d5ad23d029/bin/utaipan-tZwUujhuQw/z3 [2021-10-20 05:31:19,644 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91585849-56f8-4882-a995-78d5ad23d029/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-20 05:31:19,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91585849-56f8-4882-a995-78d5ad23d029/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-20 05:31:20,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:31:20,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-20 05:31:20,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-20 05:31:20,587 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-10-20 05:31:20,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-20 05:31:21,046 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-10-20 05:31:21,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569299292] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-20 05:31:21,047 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-20 05:31:21,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 5 [2021-10-20 05:31:21,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274088982] [2021-10-20 05:31:21,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-20 05:31:21,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 05:31:21,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-20 05:31:21,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-20 05:31:21,054 INFO L87 Difference]: Start difference. First operand 1139 states and 1471 transitions. Second operand has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:31:21,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:31:21,451 INFO L93 Difference]: Finished difference Result 2062 states and 2667 transitions. [2021-10-20 05:31:21,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-20 05:31:21,452 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 177 [2021-10-20 05:31:21,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:31:21,453 INFO L225 Difference]: With dead ends: 2062 [2021-10-20 05:31:21,453 INFO L226 Difference]: Without dead ends: 0 [2021-10-20 05:31:21,455 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 352 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.0ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-20 05:31:21,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-20 05:31:21,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-20 05:31:21,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:31:21,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-20 05:31:21,456 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 177 [2021-10-20 05:31:21,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:31:21,457 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-20 05:31:21,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:31:21,457 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-20 05:31:21,457 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-20 05:31:21,460 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-20 05:31:21,506 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91585849-56f8-4882-a995-78d5ad23d029/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-10-20 05:31:21,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91585849-56f8-4882-a995-78d5ad23d029/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-20 05:31:21,685 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-20 05:31:21,690 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 05:31:21,773 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 05:31:21,777 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 05:31:22,296 INFO L857 garLoopResultBuilder]: For program point L102(lines 102 400) no Hoare annotation was computed. [2021-10-20 05:31:22,296 INFO L857 garLoopResultBuilder]: For program point L598(line 598) no Hoare annotation was computed. [2021-10-20 05:31:22,296 INFO L857 garLoopResultBuilder]: For program point L334(lines 334 400) no Hoare annotation was computed. [2021-10-20 05:31:22,296 INFO L857 garLoopResultBuilder]: For program point L302(lines 302 400) no Hoare annotation was computed. [2021-10-20 05:31:22,296 INFO L857 garLoopResultBuilder]: For program point L170(lines 170 400) no Hoare annotation was computed. [2021-10-20 05:31:22,297 INFO L857 garLoopResultBuilder]: For program point L204(lines 204 400) no Hoare annotation was computed. [2021-10-20 05:31:22,297 INFO L857 garLoopResultBuilder]: For program point L72(lines 72 400) no Hoare annotation was computed. [2021-10-20 05:31:22,297 INFO L857 garLoopResultBuilder]: For program point L271(lines 271 400) no Hoare annotation was computed. [2021-10-20 05:31:22,297 INFO L857 garLoopResultBuilder]: For program point L139(lines 139 400) no Hoare annotation was computed. [2021-10-20 05:31:22,297 INFO L857 garLoopResultBuilder]: For program point L437-1(lines 40 585) no Hoare annotation was computed. [2021-10-20 05:31:22,298 INFO L857 garLoopResultBuilder]: For program point L371(lines 371 400) no Hoare annotation was computed. [2021-10-20 05:31:22,298 INFO L857 garLoopResultBuilder]: For program point L107(lines 107 400) no Hoare annotation was computed. [2021-10-20 05:31:22,298 INFO L857 garLoopResultBuilder]: For program point L41(lines 41 400) no Hoare annotation was computed. [2021-10-20 05:31:22,298 INFO L857 garLoopResultBuilder]: For program point L339(lines 339 400) no Hoare annotation was computed. [2021-10-20 05:31:22,298 INFO L857 garLoopResultBuilder]: For program point L207(lines 207 400) no Hoare annotation was computed. [2021-10-20 05:31:22,299 INFO L857 garLoopResultBuilder]: For program point L75(lines 75 400) no Hoare annotation was computed. [2021-10-20 05:31:22,299 INFO L857 garLoopResultBuilder]: For program point L373(lines 373 400) no Hoare annotation was computed. [2021-10-20 05:31:22,299 INFO L857 garLoopResultBuilder]: For program point L241(lines 241 400) no Hoare annotation was computed. [2021-10-20 05:31:22,299 INFO L857 garLoopResultBuilder]: For program point L175(lines 175 400) no Hoare annotation was computed. [2021-10-20 05:31:22,299 INFO L857 garLoopResultBuilder]: For program point L440-1(lines 40 585) no Hoare annotation was computed. [2021-10-20 05:31:22,300 INFO L857 garLoopResultBuilder]: For program point L275(lines 275 400) no Hoare annotation was computed. [2021-10-20 05:31:22,300 INFO L857 garLoopResultBuilder]: For program point L441(line 441) no Hoare annotation was computed. [2021-10-20 05:31:22,300 INFO L857 garLoopResultBuilder]: For program point L375(lines 375 400) no Hoare annotation was computed. [2021-10-20 05:31:22,300 INFO L857 garLoopResultBuilder]: For program point L309(lines 309 400) no Hoare annotation was computed. [2021-10-20 05:31:22,300 INFO L857 garLoopResultBuilder]: For program point L45(lines 45 400) no Hoare annotation was computed. [2021-10-20 05:31:22,301 INFO L857 garLoopResultBuilder]: For program point L343(lines 343 400) no Hoare annotation was computed. [2021-10-20 05:31:22,301 INFO L857 garLoopResultBuilder]: For program point L112(lines 112 400) no Hoare annotation was computed. [2021-10-20 05:31:22,301 INFO L857 garLoopResultBuilder]: For program point L278(lines 278 400) no Hoare annotation was computed. [2021-10-20 05:31:22,301 INFO L857 garLoopResultBuilder]: For program point L146(lines 146 400) no Hoare annotation was computed. [2021-10-20 05:31:22,301 INFO L857 garLoopResultBuilder]: For program point L213(lines 213 400) no Hoare annotation was computed. [2021-10-20 05:31:22,302 INFO L857 garLoopResultBuilder]: For program point L82(lines 82 400) no Hoare annotation was computed. [2021-10-20 05:31:22,302 INFO L857 garLoopResultBuilder]: For program point L347(lines 347 400) no Hoare annotation was computed. [2021-10-20 05:31:22,302 INFO L857 garLoopResultBuilder]: For program point L248(lines 248 400) no Hoare annotation was computed. [2021-10-20 05:31:22,302 INFO L857 garLoopResultBuilder]: For program point L183(lines 183 400) no Hoare annotation was computed. [2021-10-20 05:31:22,302 INFO L857 garLoopResultBuilder]: For program point L150(lines 150 400) no Hoare annotation was computed. [2021-10-20 05:31:22,303 INFO L857 garLoopResultBuilder]: For program point L382(lines 382 400) no Hoare annotation was computed. [2021-10-20 05:31:22,303 INFO L857 garLoopResultBuilder]: For program point L316(lines 316 400) no Hoare annotation was computed. [2021-10-20 05:31:22,303 INFO L857 garLoopResultBuilder]: For program point L283(lines 283 400) no Hoare annotation was computed. [2021-10-20 05:31:22,303 INFO L857 garLoopResultBuilder]: For program point L118(lines 118 400) no Hoare annotation was computed. [2021-10-20 05:31:22,303 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-20 05:31:22,304 INFO L857 garLoopResultBuilder]: For program point L218(lines 218 400) no Hoare annotation was computed. [2021-10-20 05:31:22,304 INFO L857 garLoopResultBuilder]: For program point L53(lines 53 400) no Hoare annotation was computed. [2021-10-20 05:31:22,304 INFO L857 garLoopResultBuilder]: For program point L154(lines 154 400) no Hoare annotation was computed. [2021-10-20 05:31:22,305 INFO L853 garLoopResultBuilder]: At program point L584(lines 40 585) the Hoare annotation is: (let ((.cse0 (not (= ~a7~0 1))) (.cse6 (<= ~a21~0 0)) (.cse5 (= ~a17~0 1)) (.cse4 (= ~a20~0 1)) (.cse1 (<= ~a17~0 0)) (.cse2 (<= 14 ~a8~0)) (.cse3 (= ~a21~0 1)) (.cse7 (<= ~a16~0 5))) (or (and .cse0 .cse1 .cse2 .cse3) (and .cse1 .cse2 .cse3 .cse4) (and .cse3 .cse5 .cse4) (and .cse0 .cse1 .cse3 (<= ~a16~0 4)) (and .cse0 (or (and .cse3 .cse5 (<= 15 ~a8~0)) (and (<= 5 ~a16~0) .cse3 .cse5)) .cse2) (and .cse6 .cse1 .cse4) (and .cse6 .cse7) (and .cse6 .cse5 .cse4) (and .cse1 .cse2 .cse3 .cse7))) [2021-10-20 05:31:22,305 INFO L857 garLoopResultBuilder]: For program point L188(lines 188 400) no Hoare annotation was computed. [2021-10-20 05:31:22,305 INFO L857 garLoopResultBuilder]: For program point L387(lines 387 400) no Hoare annotation was computed. [2021-10-20 05:31:22,305 INFO L857 garLoopResultBuilder]: For program point L288(lines 288 400) no Hoare annotation was computed. [2021-10-20 05:31:22,306 INFO L857 garLoopResultBuilder]: For program point L255(lines 255 400) no Hoare annotation was computed. [2021-10-20 05:31:22,306 INFO L857 garLoopResultBuilder]: For program point L90(lines 90 400) no Hoare annotation was computed. [2021-10-20 05:31:22,306 INFO L857 garLoopResultBuilder]: For program point L355(lines 355 400) no Hoare annotation was computed. [2021-10-20 05:31:22,306 INFO L857 garLoopResultBuilder]: For program point L322(lines 322 400) no Hoare annotation was computed. [2021-10-20 05:31:22,306 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-20 05:31:22,307 INFO L857 garLoopResultBuilder]: For program point L124(lines 124 400) no Hoare annotation was computed. [2021-10-20 05:31:22,307 INFO L860 garLoopResultBuilder]: At program point L587(lines 587 604) the Hoare annotation is: true [2021-10-20 05:31:22,307 INFO L857 garLoopResultBuilder]: For program point L224(lines 224 400) no Hoare annotation was computed. [2021-10-20 05:31:22,307 INFO L857 garLoopResultBuilder]: For program point L158(lines 158 400) no Hoare annotation was computed. [2021-10-20 05:31:22,307 INFO L857 garLoopResultBuilder]: For program point L59(lines 59 400) no Hoare annotation was computed. [2021-10-20 05:31:22,308 INFO L857 garLoopResultBuilder]: For program point L94(lines 94 400) no Hoare annotation was computed. [2021-10-20 05:31:22,308 INFO L857 garLoopResultBuilder]: For program point L392(lines 392 400) no Hoare annotation was computed. [2021-10-20 05:31:22,308 INFO L857 garLoopResultBuilder]: For program point L326(lines 326 400) no Hoare annotation was computed. [2021-10-20 05:31:22,308 INFO L857 garLoopResultBuilder]: For program point L260(lines 260 400) no Hoare annotation was computed. [2021-10-20 05:31:22,308 INFO L857 garLoopResultBuilder]: For program point L228(lines 228 400) no Hoare annotation was computed. [2021-10-20 05:31:22,309 INFO L857 garLoopResultBuilder]: For program point L162(lines 162 400) no Hoare annotation was computed. [2021-10-20 05:31:22,309 INFO L857 garLoopResultBuilder]: For program point L129(lines 129 400) no Hoare annotation was computed. [2021-10-20 05:31:22,309 INFO L857 garLoopResultBuilder]: For program point L328(lines 328 400) no Hoare annotation was computed. [2021-10-20 05:31:22,309 INFO L857 garLoopResultBuilder]: For program point L196(lines 196 400) no Hoare annotation was computed. [2021-10-20 05:31:22,309 INFO L857 garLoopResultBuilder]: For program point L64(lines 64 400) no Hoare annotation was computed. [2021-10-20 05:31:22,310 INFO L853 garLoopResultBuilder]: At program point L593-2(lines 593 603) the Hoare annotation is: (let ((.cse0 (not (= ~a7~0 1))) (.cse6 (<= ~a21~0 0)) (.cse5 (= ~a17~0 1)) (.cse4 (= ~a20~0 1)) (.cse1 (<= ~a17~0 0)) (.cse2 (<= 14 ~a8~0)) (.cse3 (= ~a21~0 1)) (.cse7 (<= ~a16~0 5))) (or (and .cse0 .cse1 .cse2 .cse3) (and .cse1 .cse2 .cse3 .cse4) (and .cse3 .cse5 .cse4) (and .cse0 .cse1 .cse3 (<= ~a16~0 4)) (and .cse0 (or (and .cse3 .cse5 (<= 15 ~a8~0)) (and (<= 5 ~a16~0) .cse3 .cse5)) .cse2) (and .cse6 .cse1 .cse4) (and .cse6 .cse7) (and .cse6 .cse5 .cse4) (and .cse1 .cse2 .cse3 .cse7))) [2021-10-20 05:31:22,310 INFO L857 garLoopResultBuilder]: For program point L296(lines 296 400) no Hoare annotation was computed. [2021-10-20 05:31:22,310 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 441) no Hoare annotation was computed. [2021-10-20 05:31:22,310 INFO L857 garLoopResultBuilder]: For program point L363(lines 363 400) no Hoare annotation was computed. [2021-10-20 05:31:22,311 INFO L857 garLoopResultBuilder]: For program point L199(lines 199 400) no Hoare annotation was computed. [2021-10-20 05:31:22,311 INFO L857 garLoopResultBuilder]: For program point L365(lines 365 400) no Hoare annotation was computed. [2021-10-20 05:31:22,311 INFO L857 garLoopResultBuilder]: For program point L266(lines 266 400) no Hoare annotation was computed. [2021-10-20 05:31:22,311 INFO L857 garLoopResultBuilder]: For program point L233(lines 233 400) no Hoare annotation was computed. [2021-10-20 05:31:22,311 INFO L857 garLoopResultBuilder]: For program point L134(lines 134 400) no Hoare annotation was computed. [2021-10-20 05:31:22,317 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-20 05:31:22,343 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 05:31:22 BoogieIcfgContainer [2021-10-20 05:31:22,343 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-20 05:31:22,344 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-20 05:31:22,344 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-20 05:31:22,344 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-20 05:31:22,345 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 05:31:08" (3/4) ... [2021-10-20 05:31:22,348 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-20 05:31:22,374 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 108 nodes and edges [2021-10-20 05:31:22,377 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 20 nodes and edges [2021-10-20 05:31:22,379 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2021-10-20 05:31:22,381 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-20 05:31:22,553 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91585849-56f8-4882-a995-78d5ad23d029/bin/utaipan-tZwUujhuQw/witness.graphml [2021-10-20 05:31:22,553 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-20 05:31:22,555 INFO L168 Benchmark]: Toolchain (without parser) took 17924.46 ms. Allocated memory was 102.8 MB in the beginning and 211.8 MB in the end (delta: 109.1 MB). Free memory was 63.8 MB in the beginning and 96.2 MB in the end (delta: -32.4 MB). Peak memory consumption was 75.8 MB. Max. memory is 16.1 GB. [2021-10-20 05:31:22,556 INFO L168 Benchmark]: CDTParser took 0.35 ms. Allocated memory is still 102.8 MB. Free memory is still 81.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-20 05:31:22,557 INFO L168 Benchmark]: CACSL2BoogieTranslator took 803.78 ms. Allocated memory is still 102.8 MB. Free memory was 63.6 MB in the beginning and 61.2 MB in the end (delta: 2.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-20 05:31:22,557 INFO L168 Benchmark]: Boogie Procedure Inliner took 121.84 ms. Allocated memory is still 102.8 MB. Free memory was 61.2 MB in the beginning and 55.4 MB in the end (delta: 5.7 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-20 05:31:22,558 INFO L168 Benchmark]: Boogie Preprocessor took 124.22 ms. Allocated memory is still 102.8 MB. Free memory was 55.4 MB in the beginning and 51.2 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-20 05:31:22,558 INFO L168 Benchmark]: RCFGBuilder took 2432.51 ms. Allocated memory was 102.8 MB in the beginning and 146.8 MB in the end (delta: 44.0 MB). Free memory was 51.2 MB in the beginning and 69.3 MB in the end (delta: -18.1 MB). Peak memory consumption was 31.4 MB. Max. memory is 16.1 GB. [2021-10-20 05:31:22,559 INFO L168 Benchmark]: TraceAbstraction took 14223.94 ms. Allocated memory was 146.8 MB in the beginning and 211.8 MB in the end (delta: 65.0 MB). Free memory was 68.4 MB in the beginning and 111.9 MB in the end (delta: -43.5 MB). Peak memory consumption was 21.3 MB. Max. memory is 16.1 GB. [2021-10-20 05:31:22,559 INFO L168 Benchmark]: Witness Printer took 209.53 ms. Allocated memory is still 211.8 MB. Free memory was 111.9 MB in the beginning and 96.2 MB in the end (delta: 15.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-20 05:31:22,562 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35 ms. Allocated memory is still 102.8 MB. Free memory is still 81.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 803.78 ms. Allocated memory is still 102.8 MB. Free memory was 63.6 MB in the beginning and 61.2 MB in the end (delta: 2.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 121.84 ms. Allocated memory is still 102.8 MB. Free memory was 61.2 MB in the beginning and 55.4 MB in the end (delta: 5.7 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 124.22 ms. Allocated memory is still 102.8 MB. Free memory was 55.4 MB in the beginning and 51.2 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 2432.51 ms. Allocated memory was 102.8 MB in the beginning and 146.8 MB in the end (delta: 44.0 MB). Free memory was 51.2 MB in the beginning and 69.3 MB in the end (delta: -18.1 MB). Peak memory consumption was 31.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 14223.94 ms. Allocated memory was 146.8 MB in the beginning and 211.8 MB in the end (delta: 65.0 MB). Free memory was 68.4 MB in the beginning and 111.9 MB in the end (delta: -43.5 MB). Peak memory consumption was 21.3 MB. Max. memory is 16.1 GB. * Witness Printer took 209.53 ms. Allocated memory is still 211.8 MB. Free memory was 111.9 MB in the beginning and 96.2 MB in the end (delta: 15.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 441]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 76 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 14102.2ms, OverallIterations: 13, TraceHistogramMax: 5, EmptinessCheckTime: 69.1ms, AutomataDifference: 5723.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 612.6ms, InitialAbstractionConstructionTime: 14.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 705 SDtfs, 749 SDslu, 52 SDs, 0 SdLazy, 3018 SolverSat, 657 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3956.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1078 GetRequests, 1053 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 129.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1210occurred in iteration=9, InterpolantAutomatonStates: 40, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 515.0ms AutomataMinimizationTime, 13 MinimizatonAttempts, 1562 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 33 NumberOfFragments, 243 HoareAnnotationTreeSize, 3 FomulaSimplifications, 5430 FormulaSimplificationTreeSizeReduction, 186.9ms HoareSimplificationTime, 3 FomulaSimplificationsInter, 410 FormulaSimplificationTreeSizeReductionInter, 415.7ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 234.0ms SsaConstructionTime, 697.8ms SatisfiabilityAnalysisTime, 4600.1ms InterpolantComputationTime, 2197 NumberOfCodeBlocks, 2197 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 2701 ConstructedInterpolants, 0 QuantifiedInterpolants, 8476 SizeOfPredicates, 0 NumberOfNonLiveVariables, 1146 ConjunctsInSsa, 6 ConjunctsInUnsatCore, 19 InterpolantComputations, 16 PerfectInterpolantSequences, 2091/2205 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 593]: Loop Invariant Derived loop invariant: ((((((((((!(a7 == 1) && a17 <= 0) && 14 <= a8) && a21 == 1) || (((a17 <= 0 && 14 <= a8) && a21 == 1) && a20 == 1)) || ((a21 == 1 && a17 == 1) && a20 == 1)) || (((!(a7 == 1) && a17 <= 0) && a21 == 1) && a16 <= 4)) || ((!(a7 == 1) && (((a21 == 1 && a17 == 1) && 15 <= a8) || ((5 <= a16 && a21 == 1) && a17 == 1))) && 14 <= a8)) || ((a21 <= 0 && a17 <= 0) && a20 == 1)) || (a21 <= 0 && a16 <= 5)) || ((a21 <= 0 && a17 == 1) && a20 == 1)) || (((a17 <= 0 && 14 <= a8) && a21 == 1) && a16 <= 5) - InvariantResult [Line: 587]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 40]: Loop Invariant Derived loop invariant: ((((((((((!(a7 == 1) && a17 <= 0) && 14 <= a8) && a21 == 1) || (((a17 <= 0 && 14 <= a8) && a21 == 1) && a20 == 1)) || ((a21 == 1 && a17 == 1) && a20 == 1)) || (((!(a7 == 1) && a17 <= 0) && a21 == 1) && a16 <= 4)) || ((!(a7 == 1) && (((a21 == 1 && a17 == 1) && 15 <= a8) || ((5 <= a16 && a21 == 1) && a17 == 1))) && 14 <= a8)) || ((a21 <= 0 && a17 <= 0) && a20 == 1)) || (a21 <= 0 && a16 <= 5)) || ((a21 <= 0 && a17 == 1) && a20 == 1)) || (((a17 <= 0 && 14 <= a8) && a21 == 1) && a16 <= 5) RESULT: Ultimate proved your program to be correct! [2021-10-20 05:31:22,637 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91585849-56f8-4882-a995-78d5ad23d029/bin/utaipan-tZwUujhuQw/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...