./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/nested3-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5faf026f-af39-4c78-be55-df6bbcb8d004/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5faf026f-af39-4c78-be55-df6bbcb8d004/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5faf026f-af39-4c78-be55-df6bbcb8d004/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5faf026f-af39-4c78-be55-df6bbcb8d004/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/nested3-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5faf026f-af39-4c78-be55-df6bbcb8d004/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5faf026f-af39-4c78-be55-df6bbcb8d004/bin/utaipan-aC7eJsxGYH --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 ed8e064f31e82b4c33cb383334d25637eef982ae8d5b8603579b97c7fdfe808e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 05:07:31,685 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 05:07:31,696 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 05:07:31,733 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 05:07:31,734 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 05:07:31,736 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 05:07:31,738 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 05:07:31,740 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 05:07:31,743 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 05:07:31,744 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 05:07:31,745 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 05:07:31,747 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 05:07:31,748 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 05:07:31,749 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 05:07:31,751 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 05:07:31,753 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 05:07:31,755 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 05:07:31,760 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 05:07:31,763 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 05:07:31,768 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 05:07:31,775 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 05:07:31,777 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 05:07:31,779 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 05:07:31,780 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 05:07:31,788 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 05:07:31,788 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 05:07:31,789 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 05:07:31,790 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 05:07:31,790 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 05:07:31,792 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 05:07:31,792 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 05:07:31,793 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 05:07:31,794 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 05:07:31,795 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 05:07:31,796 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 05:07:31,797 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 05:07:31,798 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 05:07:31,798 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 05:07:31,798 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 05:07:31,799 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 05:07:31,800 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 05:07:31,801 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5faf026f-af39-4c78-be55-df6bbcb8d004/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-03 05:07:31,857 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 05:07:31,857 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 05:07:31,858 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 05:07:31,858 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 05:07:31,859 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 05:07:31,859 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 05:07:31,859 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 05:07:31,859 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 05:07:31,859 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 05:07:31,860 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 05:07:31,860 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 05:07:31,860 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 05:07:31,860 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 05:07:31,861 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 05:07:31,861 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 05:07:31,861 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 05:07:31,862 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 05:07:31,862 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 05:07:31,862 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 05:07:31,862 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 05:07:31,863 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 05:07:31,863 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 05:07:31,863 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 05:07:31,863 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 05:07:31,863 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 05:07:31,864 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 05:07:31,864 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 05:07:31,864 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 05:07:31,864 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 05:07:31,864 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 05:07:31,865 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:07:31,865 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 05:07:31,865 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 05:07:31,865 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 05:07:31,865 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 05:07:31,866 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 05:07:31,866 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 05:07:31,866 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 05:07:31,866 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 05:07:31,866 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_5faf026f-af39-4c78-be55-df6bbcb8d004/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5faf026f-af39-4c78-be55-df6bbcb8d004/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ed8e064f31e82b4c33cb383334d25637eef982ae8d5b8603579b97c7fdfe808e [2021-11-03 05:07:32,179 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 05:07:32,205 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 05:07:32,208 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 05:07:32,209 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 05:07:32,210 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 05:07:32,211 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5faf026f-af39-4c78-be55-df6bbcb8d004/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/loops-crafted-1/nested3-1.c [2021-11-03 05:07:32,295 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5faf026f-af39-4c78-be55-df6bbcb8d004/bin/utaipan-aC7eJsxGYH/data/c76e5210c/9c5c176120fe4d3395a39a5d0efaf944/FLAG284d83164 [2021-11-03 05:07:32,727 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 05:07:32,727 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5faf026f-af39-4c78-be55-df6bbcb8d004/sv-benchmarks/c/loops-crafted-1/nested3-1.c [2021-11-03 05:07:32,733 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5faf026f-af39-4c78-be55-df6bbcb8d004/bin/utaipan-aC7eJsxGYH/data/c76e5210c/9c5c176120fe4d3395a39a5d0efaf944/FLAG284d83164 [2021-11-03 05:07:32,746 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5faf026f-af39-4c78-be55-df6bbcb8d004/bin/utaipan-aC7eJsxGYH/data/c76e5210c/9c5c176120fe4d3395a39a5d0efaf944 [2021-11-03 05:07:32,749 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 05:07:32,750 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 05:07:32,752 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 05:07:32,752 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 05:07:32,756 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 05:07:32,756 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:07:32" (1/1) ... [2021-11-03 05:07:32,758 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2246aff0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:07:32, skipping insertion in model container [2021-11-03 05:07:32,758 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:07:32" (1/1) ... [2021-11-03 05:07:32,765 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 05:07:32,778 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 05:07:32,928 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_5faf026f-af39-4c78-be55-df6bbcb8d004/sv-benchmarks/c/loops-crafted-1/nested3-1.c[321,334] [2021-11-03 05:07:32,941 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:07:32,949 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 05:07:32,961 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_5faf026f-af39-4c78-be55-df6bbcb8d004/sv-benchmarks/c/loops-crafted-1/nested3-1.c[321,334] [2021-11-03 05:07:32,966 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:07:32,979 INFO L208 MainTranslator]: Completed translation [2021-11-03 05:07:32,979 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:07:32 WrapperNode [2021-11-03 05:07:32,979 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 05:07:32,981 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 05:07:32,981 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 05:07:32,981 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 05:07:32,989 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:07:32" (1/1) ... [2021-11-03 05:07:32,996 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:07:32" (1/1) ... [2021-11-03 05:07:33,017 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 05:07:33,018 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 05:07:33,018 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 05:07:33,018 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 05:07:33,026 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:07:32" (1/1) ... [2021-11-03 05:07:33,026 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:07:32" (1/1) ... [2021-11-03 05:07:33,028 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:07:32" (1/1) ... [2021-11-03 05:07:33,028 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:07:32" (1/1) ... [2021-11-03 05:07:33,032 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:07:32" (1/1) ... [2021-11-03 05:07:33,036 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:07:32" (1/1) ... [2021-11-03 05:07:33,037 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:07:32" (1/1) ... [2021-11-03 05:07:33,040 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 05:07:33,040 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 05:07:33,041 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 05:07:33,041 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 05:07:33,042 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:07:32" (1/1) ... [2021-11-03 05:07:33,056 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:07:33,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5faf026f-af39-4c78-be55-df6bbcb8d004/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:07:33,096 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5faf026f-af39-4c78-be55-df6bbcb8d004/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 05:07:33,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5faf026f-af39-4c78-be55-df6bbcb8d004/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 05:07:33,143 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 05:07:33,143 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 05:07:33,145 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-03 05:07:33,145 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 05:07:33,524 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 05:07:33,524 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-11-03 05:07:33,527 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:07:33 BoogieIcfgContainer [2021-11-03 05:07:33,527 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 05:07:33,529 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 05:07:33,529 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 05:07:33,532 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 05:07:33,532 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 05:07:32" (1/3) ... [2021-11-03 05:07:33,533 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ac749d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:07:33, skipping insertion in model container [2021-11-03 05:07:33,533 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:07:32" (2/3) ... [2021-11-03 05:07:33,534 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ac749d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:07:33, skipping insertion in model container [2021-11-03 05:07:33,534 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:07:33" (3/3) ... [2021-11-03 05:07:33,535 INFO L111 eAbstractionObserver]: Analyzing ICFG nested3-1.c [2021-11-03 05:07:33,540 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 05:07:33,541 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-11-03 05:07:33,591 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 05:07:33,598 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 [2021-11-03 05:07:33,599 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-03 05:07:33,627 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 16 states have internal predecessors, (22), 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) [2021-11-03 05:07:33,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-03 05:07:33,632 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:07:33,633 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-03 05:07:33,647 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:07:33,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:07:33,653 INFO L85 PathProgramCache]: Analyzing trace with hash 3328135, now seen corresponding path program 1 times [2021-11-03 05:07:33,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:07:33,663 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36311594] [2021-11-03 05:07:33,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:07:33,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:07:33,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:07:33,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:07:33,835 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:07:33,837 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36311594] [2021-11-03 05:07:33,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36311594] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:07:33,838 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:07:33,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-03 05:07:33,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563022875] [2021-11-03 05:07:33,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:07:33,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:07:33,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:07:33,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:07:33,877 INFO L87 Difference]: Start difference. First operand has 17 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 16 states have internal predecessors, (22), 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 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 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) [2021-11-03 05:07:33,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:07:33,925 INFO L93 Difference]: Finished difference Result 44 states and 59 transitions. [2021-11-03 05:07:33,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:07:33,927 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 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 4 [2021-11-03 05:07:33,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:07:33,936 INFO L225 Difference]: With dead ends: 44 [2021-11-03 05:07:33,936 INFO L226 Difference]: Without dead ends: 26 [2021-11-03 05:07:33,940 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:07:33,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-11-03 05:07:33,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 16. [2021-11-03 05:07:33,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 15 states have internal predecessors, (18), 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) [2021-11-03 05:07:33,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2021-11-03 05:07:34,000 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 4 [2021-11-03 05:07:34,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:07:34,001 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2021-11-03 05:07:34,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 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) [2021-11-03 05:07:34,001 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2021-11-03 05:07:34,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-03 05:07:34,002 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:07:34,002 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-03 05:07:34,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-03 05:07:34,003 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:07:34,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:07:34,007 INFO L85 PathProgramCache]: Analyzing trace with hash 101075770, now seen corresponding path program 1 times [2021-11-03 05:07:34,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:07:34,007 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780980092] [2021-11-03 05:07:34,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:07:34,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:07:34,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:07:34,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:07:34,091 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:07:34,092 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780980092] [2021-11-03 05:07:34,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780980092] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:07:34,092 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:07:34,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 05:07:34,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114388820] [2021-11-03 05:07:34,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:07:34,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:07:34,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:07:34,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:07:34,098 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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) [2021-11-03 05:07:34,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:07:34,126 INFO L93 Difference]: Finished difference Result 36 states and 42 transitions. [2021-11-03 05:07:34,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:07:34,128 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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 5 [2021-11-03 05:07:34,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:07:34,129 INFO L225 Difference]: With dead ends: 36 [2021-11-03 05:07:34,129 INFO L226 Difference]: Without dead ends: 22 [2021-11-03 05:07:34,131 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:07:34,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-11-03 05:07:34,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 17. [2021-11-03 05:07:34,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 16 states have internal predecessors, (19), 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) [2021-11-03 05:07:34,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-11-03 05:07:34,142 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 5 [2021-11-03 05:07:34,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:07:34,143 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-11-03 05:07:34,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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) [2021-11-03 05:07:34,143 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-11-03 05:07:34,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-03 05:07:34,144 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:07:34,144 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-03 05:07:34,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-03 05:07:34,145 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:07:34,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:07:34,147 INFO L85 PathProgramCache]: Analyzing trace with hash -1163553408, now seen corresponding path program 1 times [2021-11-03 05:07:34,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:07:34,150 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220714091] [2021-11-03 05:07:34,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:07:34,151 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:07:34,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:07:34,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:07:34,222 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:07:34,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220714091] [2021-11-03 05:07:34,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220714091] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:07:34,224 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:07:34,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 05:07:34,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835927136] [2021-11-03 05:07:34,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:07:34,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:07:34,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:07:34,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:07:34,235 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2021-11-03 05:07:34,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:07:34,252 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2021-11-03 05:07:34,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:07:34,253 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 6 [2021-11-03 05:07:34,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:07:34,254 INFO L225 Difference]: With dead ends: 34 [2021-11-03 05:07:34,254 INFO L226 Difference]: Without dead ends: 19 [2021-11-03 05:07:34,255 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:07:34,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-11-03 05:07:34,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2021-11-03 05:07:34,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 17 states have internal predecessors, (20), 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) [2021-11-03 05:07:34,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2021-11-03 05:07:34,262 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 6 [2021-11-03 05:07:34,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:07:34,263 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2021-11-03 05:07:34,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2021-11-03 05:07:34,263 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2021-11-03 05:07:34,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-03 05:07:34,264 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:07:34,264 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:07:34,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-03 05:07:34,264 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:07:34,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:07:34,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1712009681, now seen corresponding path program 1 times [2021-11-03 05:07:34,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:07:34,266 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383290650] [2021-11-03 05:07:34,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:07:34,267 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:07:34,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:07:34,381 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:07:34,382 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:07:34,382 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383290650] [2021-11-03 05:07:34,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383290650] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 05:07:34,382 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23761272] [2021-11-03 05:07:34,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:07:34,383 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:07:34,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5faf026f-af39-4c78-be55-df6bbcb8d004/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:07:34,385 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5faf026f-af39-4c78-be55-df6bbcb8d004/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 05:07:34,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5faf026f-af39-4c78-be55-df6bbcb8d004/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-03 05:07:34,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:07:34,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 05:07:34,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:07:34,508 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:07:34,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:07:34,549 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:07:34,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23761272] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:07:34,550 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [675629364] [2021-11-03 05:07:34,571 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-03 05:07:34,571 INFO L166 IcfgInterpreter]: Building call graph [2021-11-03 05:07:34,576 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-03 05:07:34,582 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-03 05:07:34,583 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-03 05:07:34,614 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:07:34,625 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 05:07:34,627 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:07:34,628 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-03 05:07:34,629 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 05:07:34,630 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:07:34,630 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-03 05:07:34,635 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 131 [2021-11-03 05:07:34,659 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_9|], 21=[|v_#valid_10|]} [2021-11-03 05:07:34,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:07:34,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:07:34,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:07:34,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-03 05:07:34,685 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:07:34,685 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-03 05:07:34,686 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:07:34,687 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-03 05:07:34,688 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-03 05:07:34,689 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:34,710 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:07:34,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:07:34,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:07:34,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:07:34,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:07:34,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:07:34,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:07:34,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:07:34,755 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-03 05:07:34,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 34 [2021-11-03 05:07:34,759 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:07:34,765 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-11-03 05:07:34,768 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:07:34,780 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-11-03 05:07:34,780 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-03 05:07:34,790 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:34,825 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:07:34,830 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:07:34,835 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 107 [2021-11-03 05:07:34,836 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-03 05:07:34,836 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:128, output treesize:107 [2021-11-03 05:07:34,844 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:07:34,849 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 112 [2021-11-03 05:07:34,857 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:07:34,861 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 117 [2021-11-03 05:07:34,866 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:07:34,871 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 126 [2021-11-03 05:07:34,875 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:34,914 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:34,949 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:35,026 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:07:35,050 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 317 [2021-11-03 05:07:35,063 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:35,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:35,162 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:35,167 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:35,170 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:35,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:35,201 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:35,214 INFO L180 QuantifierPusher]: treesize reduction 48, result has 51.5 percent of original size [2021-11-03 05:07:35,225 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 47 [2021-11-03 05:07:35,236 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-03 05:07:35,790 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-03 05:07:35,790 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-03 05:07:35,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-11-03 05:07:35,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662723822] [2021-11-03 05:07:35,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 05:07:35,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:07:35,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 05:07:35,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-03 05:07:35,792 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 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) [2021-11-03 05:07:35,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:07:35,831 INFO L93 Difference]: Finished difference Result 38 states and 45 transitions. [2021-11-03 05:07:35,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 05:07:35,832 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 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 7 [2021-11-03 05:07:35,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:07:35,832 INFO L225 Difference]: With dead ends: 38 [2021-11-03 05:07:35,833 INFO L226 Difference]: Without dead ends: 22 [2021-11-03 05:07:35,833 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-11-03 05:07:35,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-11-03 05:07:35,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2021-11-03 05:07:35,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 20 states have internal predecessors, (23), 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) [2021-11-03 05:07:35,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2021-11-03 05:07:35,837 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 7 [2021-11-03 05:07:35,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:07:35,838 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2021-11-03 05:07:35,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 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) [2021-11-03 05:07:35,838 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2021-11-03 05:07:35,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-03 05:07:35,839 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:07:35,839 INFO L513 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2021-11-03 05:07:35,877 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5faf026f-af39-4c78-be55-df6bbcb8d004/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-03 05:07:36,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5faf026f-af39-4c78-be55-df6bbcb8d004/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:07:36,059 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:07:36,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:07:36,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1325020864, now seen corresponding path program 2 times [2021-11-03 05:07:36,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:07:36,060 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141641938] [2021-11-03 05:07:36,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:07:36,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:07:36,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:07:36,154 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:07:36,154 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:07:36,154 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141641938] [2021-11-03 05:07:36,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141641938] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 05:07:36,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716246889] [2021-11-03 05:07:36,155 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 05:07:36,155 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:07:36,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5faf026f-af39-4c78-be55-df6bbcb8d004/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:07:36,156 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5faf026f-af39-4c78-be55-df6bbcb8d004/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 05:07:36,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5faf026f-af39-4c78-be55-df6bbcb8d004/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-03 05:07:36,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-03 05:07:36,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 05:07:36,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-03 05:07:36,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:07:36,467 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-03 05:07:36,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:07:36,569 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-03 05:07:36,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716246889] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:07:36,569 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-11-03 05:07:36,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [7] total 11 [2021-11-03 05:07:36,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128614370] [2021-11-03 05:07:36,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:07:36,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:07:36,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:07:36,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-11-03 05:07:36,571 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 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) [2021-11-03 05:07:36,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:07:36,779 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2021-11-03 05:07:36,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-03 05:07:36,783 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 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 10 [2021-11-03 05:07:36,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:07:36,783 INFO L225 Difference]: With dead ends: 32 [2021-11-03 05:07:36,783 INFO L226 Difference]: Without dead ends: 30 [2021-11-03 05:07:36,784 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-11-03 05:07:36,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-03 05:07:36,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 19. [2021-11-03 05:07:36,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 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) [2021-11-03 05:07:36,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-11-03 05:07:36,791 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 10 [2021-11-03 05:07:36,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:07:36,791 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-11-03 05:07:36,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 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) [2021-11-03 05:07:36,792 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-11-03 05:07:36,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-03 05:07:36,793 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:07:36,793 INFO L513 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:07:36,799 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5faf026f-af39-4c78-be55-df6bbcb8d004/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-03 05:07:36,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5faf026f-af39-4c78-be55-df6bbcb8d004/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-03 05:07:36,998 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:07:36,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:07:36,998 INFO L85 PathProgramCache]: Analyzing trace with hash 1352738743, now seen corresponding path program 1 times [2021-11-03 05:07:36,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:07:36,998 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654099067] [2021-11-03 05:07:36,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:07:36,999 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:07:37,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:07:37,119 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:07:37,119 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:07:37,119 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654099067] [2021-11-03 05:07:37,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654099067] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 05:07:37,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258497127] [2021-11-03 05:07:37,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:07:37,121 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:07:37,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5faf026f-af39-4c78-be55-df6bbcb8d004/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:07:37,127 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5faf026f-af39-4c78-be55-df6bbcb8d004/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 05:07:37,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5faf026f-af39-4c78-be55-df6bbcb8d004/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-03 05:07:37,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:07:37,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-03 05:07:37,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:07:37,259 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-03 05:07:37,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:07:37,376 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-03 05:07:37,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258497127] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:07:37,377 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [510584925] [2021-11-03 05:07:37,381 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-03 05:07:37,381 INFO L166 IcfgInterpreter]: Building call graph [2021-11-03 05:07:37,381 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-03 05:07:37,381 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-03 05:07:37,381 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-03 05:07:37,395 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:07:37,397 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 05:07:37,397 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:07:37,398 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-03 05:07:37,399 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 05:07:37,400 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:07:37,400 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-03 05:07:37,403 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 131 [2021-11-03 05:07:37,415 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_10|], 21=[|v_#valid_11|]} [2021-11-03 05:07:37,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:07:37,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:07:37,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:07:37,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-03 05:07:37,436 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:07:37,437 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-03 05:07:37,437 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:07:37,438 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-03 05:07:37,438 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-03 05:07:37,438 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:37,443 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:07:37,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:07:37,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:07:37,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:07:37,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:07:37,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:07:37,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:07:37,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:07:37,481 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-03 05:07:37,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 34 [2021-11-03 05:07:37,482 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:07:37,486 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-11-03 05:07:37,487 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:07:37,487 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-11-03 05:07:37,488 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-03 05:07:37,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:37,493 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:07:37,496 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:07:37,500 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 107 [2021-11-03 05:07:37,500 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-03 05:07:37,501 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:128, output treesize:107 [2021-11-03 05:07:37,506 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:07:37,511 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 112 [2021-11-03 05:07:37,516 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:07:37,523 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 117 [2021-11-03 05:07:37,529 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:07:37,534 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 126 [2021-11-03 05:07:37,537 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:37,559 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:37,577 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:37,622 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:07:37,643 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 317 [2021-11-03 05:07:37,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:37,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:37,710 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:37,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:37,714 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:37,715 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:37,723 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:37,733 INFO L180 QuantifierPusher]: treesize reduction 48, result has 51.5 percent of original size [2021-11-03 05:07:37,736 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 47 [2021-11-03 05:07:37,750 INFO L180 QuantifierPusher]: treesize reduction 49, result has 56.3 percent of original size [2021-11-03 05:07:37,753 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 57 [2021-11-03 05:07:37,755 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:37,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:37,786 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:37,808 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:07:37,816 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 05:07:37,819 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:07:37,831 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 162 [2021-11-03 05:07:37,837 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 228 [2021-11-03 05:07:37,843 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:07:37,848 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 228 [2021-11-03 05:07:37,853 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:37,885 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:37,887 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:37,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:37,890 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:37,891 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:37,898 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:37,908 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:07:37,913 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 126 [2021-11-03 05:07:37,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:37,931 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:37,933 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:37,934 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:37,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:37,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:37,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:37,948 INFO L180 QuantifierPusher]: treesize reduction 42, result has 56.3 percent of original size [2021-11-03 05:07:37,950 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 50 [2021-11-03 05:07:37,956 INFO L180 QuantifierPusher]: treesize reduction 43, result has 60.6 percent of original size [2021-11-03 05:07:37,958 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 60 [2021-11-03 05:07:37,961 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:37,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:37,978 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:37,979 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:37,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:37,983 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:37,990 INFO L180 QuantifierPusher]: treesize reduction 42, result has 53.8 percent of original size [2021-11-03 05:07:37,992 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 45 [2021-11-03 05:07:37,993 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:07:37,995 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 45 [2021-11-03 05:07:37,997 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:38,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:38,006 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:38,016 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:07:38,021 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 148 [2021-11-03 05:07:38,024 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:38,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:38,041 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:38,042 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:38,043 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:38,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:38,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:38,055 INFO L180 QuantifierPusher]: treesize reduction 42, result has 54.8 percent of original size [2021-11-03 05:07:38,057 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 47 [2021-11-03 05:07:38,062 INFO L180 QuantifierPusher]: treesize reduction 43, result has 59.4 percent of original size [2021-11-03 05:07:38,064 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 57 [2021-11-03 05:07:38,069 INFO L180 QuantifierPusher]: treesize reduction 42, result has 53.8 percent of original size [2021-11-03 05:07:38,071 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 45 [2021-11-03 05:07:38,073 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:07:38,075 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 54 [2021-11-03 05:07:38,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:38,082 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:38,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:38,108 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:07:38,115 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 155 [2021-11-03 05:07:38,119 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:38,141 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:38,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:38,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:38,151 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:38,154 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:38,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:38,168 INFO L180 QuantifierPusher]: treesize reduction 42, result has 54.8 percent of original size [2021-11-03 05:07:38,170 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 47 [2021-11-03 05:07:38,184 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-03 05:07:38,959 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-03 05:07:38,959 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-03 05:07:38,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 15 [2021-11-03 05:07:38,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956255080] [2021-11-03 05:07:38,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-03 05:07:38,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:07:38,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-03 05:07:38,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-11-03 05:07:38,961 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 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) [2021-11-03 05:07:39,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:07:39,485 INFO L93 Difference]: Finished difference Result 65 states and 79 transitions. [2021-11-03 05:07:39,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-03 05:07:39,489 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 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 13 [2021-11-03 05:07:39,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:07:39,490 INFO L225 Difference]: With dead ends: 65 [2021-11-03 05:07:39,490 INFO L226 Difference]: Without dead ends: 48 [2021-11-03 05:07:39,491 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=330, Invalid=1310, Unknown=0, NotChecked=0, Total=1640 [2021-11-03 05:07:39,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-11-03 05:07:39,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2021-11-03 05:07:39,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 46 states have internal predecessors, (52), 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) [2021-11-03 05:07:39,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 52 transitions. [2021-11-03 05:07:39,506 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 52 transitions. Word has length 13 [2021-11-03 05:07:39,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:07:39,506 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 52 transitions. [2021-11-03 05:07:39,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 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) [2021-11-03 05:07:39,506 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 52 transitions. [2021-11-03 05:07:39,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-03 05:07:39,507 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:07:39,508 INFO L513 BasicCegarLoop]: trace histogram [20, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2021-11-03 05:07:39,545 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5faf026f-af39-4c78-be55-df6bbcb8d004/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-03 05:07:39,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5faf026f-af39-4c78-be55-df6bbcb8d004/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-03 05:07:39,723 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:07:39,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:07:39,723 INFO L85 PathProgramCache]: Analyzing trace with hash -876793158, now seen corresponding path program 2 times [2021-11-03 05:07:39,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:07:39,723 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356740453] [2021-11-03 05:07:39,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:07:39,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:07:39,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:07:39,861 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 112 proven. 15 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2021-11-03 05:07:39,862 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:07:39,862 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356740453] [2021-11-03 05:07:39,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356740453] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 05:07:39,862 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076760194] [2021-11-03 05:07:39,862 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 05:07:39,862 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:07:39,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5faf026f-af39-4c78-be55-df6bbcb8d004/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:07:39,864 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5faf026f-af39-4c78-be55-df6bbcb8d004/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 05:07:39,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5faf026f-af39-4c78-be55-df6bbcb8d004/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-03 05:07:40,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-03 05:07:40,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 05:07:40,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-03 05:07:40,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:07:40,206 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 118 proven. 15 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2021-11-03 05:07:40,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:07:40,531 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 118 proven. 15 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2021-11-03 05:07:40,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076760194] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:07:40,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2137538254] [2021-11-03 05:07:40,533 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-03 05:07:40,533 INFO L166 IcfgInterpreter]: Building call graph [2021-11-03 05:07:40,534 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-03 05:07:40,534 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-03 05:07:40,534 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-03 05:07:40,540 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:07:40,541 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 05:07:40,541 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:07:40,542 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-03 05:07:40,542 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 05:07:40,542 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:07:40,546 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-03 05:07:40,548 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 131 [2021-11-03 05:07:40,554 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_11|], 21=[|v_#valid_12|]} [2021-11-03 05:07:40,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:07:40,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:07:40,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:07:40,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-03 05:07:40,570 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:07:40,572 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-03 05:07:40,573 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:07:40,574 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-03 05:07:40,574 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-03 05:07:40,574 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:40,586 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:07:40,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:07:40,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:07:40,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:07:40,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:07:40,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:07:40,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:07:40,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:07:40,620 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-03 05:07:40,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 34 [2021-11-03 05:07:40,621 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:07:40,624 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-11-03 05:07:40,624 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:07:40,625 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-11-03 05:07:40,625 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-03 05:07:40,626 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:40,638 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:07:40,639 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:07:40,641 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 107 [2021-11-03 05:07:40,641 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-03 05:07:40,642 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:128, output treesize:107 [2021-11-03 05:07:40,645 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:07:40,648 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 112 [2021-11-03 05:07:40,651 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:07:40,653 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 117 [2021-11-03 05:07:40,656 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:07:40,658 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 117 [2021-11-03 05:07:40,661 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:40,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:40,685 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:40,714 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:07:40,725 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 310 [2021-11-03 05:07:40,735 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:40,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:40,774 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:40,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:40,777 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:40,778 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:40,785 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:40,791 INFO L180 QuantifierPusher]: treesize reduction 48, result has 51.5 percent of original size [2021-11-03 05:07:40,793 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 47 [2021-11-03 05:07:40,801 INFO L180 QuantifierPusher]: treesize reduction 49, result has 56.3 percent of original size [2021-11-03 05:07:40,808 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 59 [2021-11-03 05:07:40,810 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:40,817 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:40,829 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:40,843 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:07:40,848 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 05:07:40,851 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:07:40,857 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 05:07:40,857 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:07:40,858 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-11-03 05:07:40,860 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 166 [2021-11-03 05:07:40,862 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 05:07:40,862 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:07:40,863 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-11-03 05:07:40,866 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 232 [2021-11-03 05:07:40,880 INFO L180 QuantifierPusher]: treesize reduction 93, result has 69.7 percent of original size [2021-11-03 05:07:40,885 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 05:07:40,886 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:07:40,886 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-11-03 05:07:40,889 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 215 [2021-11-03 05:07:40,901 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:40,903 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:40,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:40,926 INFO L180 QuantifierPusher]: treesize reduction 97, result has 81.6 percent of original size [2021-11-03 05:07:40,939 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 05:07:40,939 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:07:40,940 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-11-03 05:07:40,946 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 435 [2021-11-03 05:07:40,963 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:40,965 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:40,966 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:40,967 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:07:40,969 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-11-03 05:07:40,970 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:07:40,971 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-11-03 05:07:40,975 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:40,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:40,995 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:40,996 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:40,999 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:41,001 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:07:41,002 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-03 05:07:41,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:41,005 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:41,021 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:41,025 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:07:41,026 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-03 05:07:41,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:41,030 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:41,031 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:41,032 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:07:41,033 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-03 05:07:41,035 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:07:41,036 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-11-03 05:07:41,038 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:07:41,039 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-11-03 05:07:41,041 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:41,042 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:41,043 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:41,046 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:07:41,047 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 41 [2021-11-03 05:07:41,049 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:41,054 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:41,055 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:41,056 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:07:41,057 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-03 05:07:41,062 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-03 05:07:41,491 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-03 05:07:41,491 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-03 05:07:41,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2021-11-03 05:07:41,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193724322] [2021-11-03 05:07:41,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-03 05:07:41,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:07:41,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-03 05:07:41,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2021-11-03 05:07:41,493 INFO L87 Difference]: Start difference. First operand 47 states and 52 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 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) [2021-11-03 05:07:42,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:07:42,818 INFO L93 Difference]: Finished difference Result 121 states and 159 transitions. [2021-11-03 05:07:42,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-03 05:07:42,819 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 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 41 [2021-11-03 05:07:42,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:07:42,820 INFO L225 Difference]: With dead ends: 121 [2021-11-03 05:07:42,820 INFO L226 Difference]: Without dead ends: 76 [2021-11-03 05:07:42,821 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=215, Invalid=487, Unknown=0, NotChecked=0, Total=702 [2021-11-03 05:07:42,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-11-03 05:07:42,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2021-11-03 05:07:42,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 73 states have (on average 1.095890410958904) internal successors, (80), 74 states have internal predecessors, (80), 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) [2021-11-03 05:07:42,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 80 transitions. [2021-11-03 05:07:42,845 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 80 transitions. Word has length 41 [2021-11-03 05:07:42,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:07:42,846 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 80 transitions. [2021-11-03 05:07:42,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 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) [2021-11-03 05:07:42,846 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 80 transitions. [2021-11-03 05:07:42,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-03 05:07:42,849 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:07:42,849 INFO L513 BasicCegarLoop]: trace histogram [48, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2021-11-03 05:07:42,867 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5faf026f-af39-4c78-be55-df6bbcb8d004/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-03 05:07:43,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5faf026f-af39-4c78-be55-df6bbcb8d004/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:07:43,053 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:07:43,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:07:43,054 INFO L85 PathProgramCache]: Analyzing trace with hash 2027176750, now seen corresponding path program 3 times [2021-11-03 05:07:43,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:07:43,054 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744454829] [2021-11-03 05:07:43,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:07:43,055 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:07:43,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:07:43,296 INFO L134 CoverageAnalysis]: Checked inductivity of 1348 backedges. 511 proven. 78 refuted. 0 times theorem prover too weak. 759 trivial. 0 not checked. [2021-11-03 05:07:43,296 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:07:43,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744454829] [2021-11-03 05:07:43,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744454829] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 05:07:43,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942934181] [2021-11-03 05:07:43,297 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-03 05:07:43,297 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:07:43,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5faf026f-af39-4c78-be55-df6bbcb8d004/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:07:43,298 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5faf026f-af39-4c78-be55-df6bbcb8d004/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 05:07:43,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5faf026f-af39-4c78-be55-df6bbcb8d004/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-03 05:07:43,425 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-03 05:07:43,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 05:07:43,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-03 05:07:43,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:07:43,824 INFO L134 CoverageAnalysis]: Checked inductivity of 1348 backedges. 0 proven. 1086 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2021-11-03 05:07:43,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:07:44,447 INFO L134 CoverageAnalysis]: Checked inductivity of 1348 backedges. 40 proven. 1046 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2021-11-03 05:07:44,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942934181] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:07:44,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [989236565] [2021-11-03 05:07:44,449 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-03 05:07:44,449 INFO L166 IcfgInterpreter]: Building call graph [2021-11-03 05:07:44,450 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-03 05:07:44,450 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-03 05:07:44,450 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-03 05:07:44,455 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:07:44,456 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 05:07:44,458 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:07:44,459 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-03 05:07:44,459 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 05:07:44,460 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:07:44,460 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-03 05:07:44,461 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 131 [2021-11-03 05:07:44,464 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_12|], 21=[|v_#valid_13|]} [2021-11-03 05:07:44,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:07:44,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:07:44,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:07:44,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-03 05:07:44,476 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:07:44,477 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-03 05:07:44,477 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:07:44,478 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-03 05:07:44,478 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-03 05:07:44,478 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:44,482 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:07:44,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:07:44,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:07:44,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:07:44,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:07:44,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:07:44,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:07:44,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:07:44,512 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-03 05:07:44,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 34 [2021-11-03 05:07:44,513 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:07:44,516 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-11-03 05:07:44,516 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:07:44,517 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-11-03 05:07:44,517 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-03 05:07:44,518 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:44,521 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:07:44,522 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:07:44,524 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 107 [2021-11-03 05:07:44,524 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-03 05:07:44,525 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:128, output treesize:107 [2021-11-03 05:07:44,528 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:07:44,530 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 112 [2021-11-03 05:07:44,533 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:07:44,537 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 117 [2021-11-03 05:07:44,540 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:07:44,542 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 117 [2021-11-03 05:07:44,545 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:44,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:44,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:44,591 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:07:44,597 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 310 [2021-11-03 05:07:44,602 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:44,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:44,658 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:44,659 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:44,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:44,661 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:44,666 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:44,673 INFO L180 QuantifierPusher]: treesize reduction 48, result has 51.5 percent of original size [2021-11-03 05:07:44,675 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 47 [2021-11-03 05:07:44,679 INFO L180 QuantifierPusher]: treesize reduction 49, result has 56.3 percent of original size [2021-11-03 05:07:44,681 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 57 [2021-11-03 05:07:44,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:44,691 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:44,698 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:44,716 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:07:44,727 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 05:07:44,729 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:07:44,740 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 162 [2021-11-03 05:07:44,743 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 228 [2021-11-03 05:07:44,748 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:07:44,752 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 237 [2021-11-03 05:07:44,757 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:44,792 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:44,794 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:44,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:44,797 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:44,798 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:44,803 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:44,810 INFO L180 QuantifierPusher]: treesize reduction 42, result has 56.3 percent of original size [2021-11-03 05:07:44,811 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 50 [2021-11-03 05:07:44,817 INFO L180 QuantifierPusher]: treesize reduction 43, result has 60.6 percent of original size [2021-11-03 05:07:44,818 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 60 [2021-11-03 05:07:44,822 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:44,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:44,838 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:44,839 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:44,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:44,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:44,850 INFO L180 QuantifierPusher]: treesize reduction 42, result has 53.8 percent of original size [2021-11-03 05:07:44,853 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 45 [2021-11-03 05:07:44,855 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:07:44,859 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 45 [2021-11-03 05:07:44,861 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:44,865 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:44,870 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:44,879 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:07:44,883 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 148 [2021-11-03 05:07:44,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:44,902 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:44,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:44,905 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:44,906 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:44,907 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:44,910 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:44,916 INFO L180 QuantifierPusher]: treesize reduction 42, result has 54.8 percent of original size [2021-11-03 05:07:44,917 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 47 [2021-11-03 05:07:44,924 INFO L180 QuantifierPusher]: treesize reduction 43, result has 59.4 percent of original size [2021-11-03 05:07:44,926 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 57 [2021-11-03 05:07:44,932 INFO L180 QuantifierPusher]: treesize reduction 42, result has 53.8 percent of original size [2021-11-03 05:07:44,935 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 45 [2021-11-03 05:07:44,937 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:07:44,938 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 45 [2021-11-03 05:07:44,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:44,943 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:44,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:44,956 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:07:44,960 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 148 [2021-11-03 05:07:44,963 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:44,977 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:44,979 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:44,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:44,981 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:44,982 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:44,985 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:44,990 INFO L180 QuantifierPusher]: treesize reduction 42, result has 54.8 percent of original size [2021-11-03 05:07:44,991 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 47 [2021-11-03 05:07:45,000 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-03 05:07:45,951 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-03 05:07:45,951 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-03 05:07:45,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 35 [2021-11-03 05:07:45,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117284883] [2021-11-03 05:07:45,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-03 05:07:45,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:07:45,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-03 05:07:45,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=1406, Unknown=0, NotChecked=0, Total=1640 [2021-11-03 05:07:45,954 INFO L87 Difference]: Start difference. First operand 75 states and 80 transitions. Second operand has 35 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 35 states have internal predecessors, (78), 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) [2021-11-03 05:07:55,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:07:55,984 INFO L93 Difference]: Finished difference Result 255 states and 287 transitions. [2021-11-03 05:07:55,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2021-11-03 05:07:55,985 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 35 states have internal predecessors, (78), 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 69 [2021-11-03 05:07:55,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:07:55,987 INFO L225 Difference]: With dead ends: 255 [2021-11-03 05:07:55,987 INFO L226 Difference]: Without dead ends: 182 [2021-11-03 05:07:56,002 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10862 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=3471, Invalid=26631, Unknown=0, NotChecked=0, Total=30102 [2021-11-03 05:07:56,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-11-03 05:07:56,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 181. [2021-11-03 05:07:56,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 179 states have (on average 1.0726256983240223) internal successors, (192), 180 states have internal predecessors, (192), 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) [2021-11-03 05:07:56,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 192 transitions. [2021-11-03 05:07:56,051 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 192 transitions. Word has length 69 [2021-11-03 05:07:56,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:07:56,051 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 192 transitions. [2021-11-03 05:07:56,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 35 states have internal predecessors, (78), 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) [2021-11-03 05:07:56,052 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 192 transitions. [2021-11-03 05:07:56,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-11-03 05:07:56,057 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:07:56,058 INFO L513 BasicCegarLoop]: trace histogram [130, 10, 10, 10, 10, 1, 1, 1, 1, 1] [2021-11-03 05:07:56,083 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5faf026f-af39-4c78-be55-df6bbcb8d004/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-03 05:07:56,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5faf026f-af39-4c78-be55-df6bbcb8d004/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-11-03 05:07:56,267 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:07:56,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:07:56,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1614234630, now seen corresponding path program 4 times [2021-11-03 05:07:56,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:07:56,267 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441115230] [2021-11-03 05:07:56,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:07:56,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:07:56,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:07:56,797 INFO L134 CoverageAnalysis]: Checked inductivity of 9875 backedges. 1774 proven. 91 refuted. 0 times theorem prover too weak. 8010 trivial. 0 not checked. [2021-11-03 05:07:56,797 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:07:56,797 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441115230] [2021-11-03 05:07:56,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441115230] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 05:07:56,798 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382046236] [2021-11-03 05:07:56,798 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-03 05:07:56,798 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:07:56,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5faf026f-af39-4c78-be55-df6bbcb8d004/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:07:56,803 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5faf026f-af39-4c78-be55-df6bbcb8d004/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 05:07:56,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5faf026f-af39-4c78-be55-df6bbcb8d004/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-03 05:07:57,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:07:57,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-03 05:07:57,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:07:57,673 INFO L134 CoverageAnalysis]: Checked inductivity of 9875 backedges. 4574 proven. 91 refuted. 0 times theorem prover too weak. 5210 trivial. 0 not checked. [2021-11-03 05:07:57,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:07:58,436 INFO L134 CoverageAnalysis]: Checked inductivity of 9875 backedges. 4574 proven. 91 refuted. 0 times theorem prover too weak. 5210 trivial. 0 not checked. [2021-11-03 05:07:58,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382046236] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:07:58,436 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1089671072] [2021-11-03 05:07:58,439 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-03 05:07:58,439 INFO L166 IcfgInterpreter]: Building call graph [2021-11-03 05:07:58,439 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-03 05:07:58,439 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-03 05:07:58,440 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-03 05:07:58,444 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:07:58,445 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 05:07:58,446 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:07:58,446 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-03 05:07:58,447 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 05:07:58,447 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:07:58,447 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-03 05:07:58,449 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 131 [2021-11-03 05:07:58,451 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_13|], 21=[|v_#valid_14|]} [2021-11-03 05:07:58,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:07:58,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:07:58,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:07:58,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-03 05:07:58,462 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:07:58,462 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-03 05:07:58,463 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:07:58,463 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-03 05:07:58,464 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-03 05:07:58,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:58,468 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:07:58,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:07:58,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:07:58,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:07:58,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:07:58,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:07:58,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:07:58,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:07:58,493 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-03 05:07:58,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 34 [2021-11-03 05:07:58,494 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:07:58,496 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-11-03 05:07:58,496 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:07:58,497 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-11-03 05:07:58,497 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-03 05:07:58,498 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:58,501 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:07:58,502 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:07:58,504 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 107 [2021-11-03 05:07:58,504 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-03 05:07:58,505 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:128, output treesize:107 [2021-11-03 05:07:58,508 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:07:58,510 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 112 [2021-11-03 05:07:58,513 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:07:58,515 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 117 [2021-11-03 05:07:58,518 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:07:58,520 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 117 [2021-11-03 05:07:58,523 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:58,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:58,558 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:58,582 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:07:58,588 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 310 [2021-11-03 05:07:58,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:58,626 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:58,627 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:58,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:58,629 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:58,630 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:58,634 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:58,640 INFO L180 QuantifierPusher]: treesize reduction 48, result has 51.5 percent of original size [2021-11-03 05:07:58,642 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 47 [2021-11-03 05:07:58,646 INFO L180 QuantifierPusher]: treesize reduction 49, result has 56.3 percent of original size [2021-11-03 05:07:58,655 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 59 [2021-11-03 05:07:58,658 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:58,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:58,670 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:58,682 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:07:58,687 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 05:07:58,689 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:07:58,717 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 05:07:58,717 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:07:58,718 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-11-03 05:07:58,722 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 166 [2021-11-03 05:07:58,724 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 05:07:58,726 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:07:58,727 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-11-03 05:07:58,730 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 232 [2021-11-03 05:07:58,743 INFO L180 QuantifierPusher]: treesize reduction 93, result has 69.7 percent of original size [2021-11-03 05:07:58,748 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 05:07:58,749 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:07:58,754 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-11-03 05:07:58,757 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 215 [2021-11-03 05:07:58,765 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:58,767 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:58,768 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:58,787 INFO L180 QuantifierPusher]: treesize reduction 97, result has 81.6 percent of original size [2021-11-03 05:07:58,793 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 05:07:58,794 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:07:58,794 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-11-03 05:07:58,800 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 435 [2021-11-03 05:07:58,813 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:58,814 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:58,815 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:58,816 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:07:58,817 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-11-03 05:07:58,818 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:07:58,819 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-11-03 05:07:58,822 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:58,833 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:58,834 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:58,835 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:58,838 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:58,839 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:07:58,840 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-03 05:07:58,841 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:58,842 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:58,843 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:58,845 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:07:58,847 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-03 05:07:58,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:58,851 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:58,854 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:58,855 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:07:58,858 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-03 05:07:58,860 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:07:58,861 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-11-03 05:07:58,864 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:07:58,865 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-03 05:07:58,866 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:58,867 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:58,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:58,870 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:07:58,871 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-03 05:07:58,873 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:58,875 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:58,876 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:07:58,877 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:07:58,878 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-03 05:07:58,883 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-03 05:07:59,253 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-03 05:07:59,253 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-03 05:07:59,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 31 [2021-11-03 05:07:59,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798827151] [2021-11-03 05:07:59,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-03 05:07:59,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:07:59,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-03 05:07:59,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=1001, Unknown=0, NotChecked=0, Total=1332 [2021-11-03 05:07:59,256 INFO L87 Difference]: Start difference. First operand 181 states and 192 transitions. Second operand has 31 states, 31 states have (on average 1.5161290322580645) internal successors, (47), 31 states have internal predecessors, (47), 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) [2021-11-03 05:08:13,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:08:13,281 INFO L93 Difference]: Finished difference Result 511 states and 683 transitions. [2021-11-03 05:08:13,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-03 05:08:13,281 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.5161290322580645) internal successors, (47), 31 states have internal predecessors, (47), 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 [2021-11-03 05:08:13,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:08:13,284 INFO L225 Difference]: With dead ends: 511 [2021-11-03 05:08:13,284 INFO L226 Difference]: Without dead ends: 332 [2021-11-03 05:08:13,286 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 552 GetRequests, 503 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=747, Invalid=1703, Unknown=0, NotChecked=0, Total=2450 [2021-11-03 05:08:13,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-11-03 05:08:13,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 331. [2021-11-03 05:08:13,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 329 states have (on average 1.0395136778115501) internal successors, (342), 330 states have internal predecessors, (342), 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) [2021-11-03 05:08:13,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 342 transitions. [2021-11-03 05:08:13,364 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 342 transitions. Word has length 175 [2021-11-03 05:08:13,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:08:13,365 INFO L470 AbstractCegarLoop]: Abstraction has 331 states and 342 transitions. [2021-11-03 05:08:13,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.5161290322580645) internal successors, (47), 31 states have internal predecessors, (47), 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) [2021-11-03 05:08:13,365 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 342 transitions. [2021-11-03 05:08:13,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2021-11-03 05:08:13,372 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:08:13,373 INFO L513 BasicCegarLoop]: trace histogram [280, 10, 10, 10, 10, 1, 1, 1, 1, 1] [2021-11-03 05:08:13,411 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5faf026f-af39-4c78-be55-df6bbcb8d004/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-03 05:08:13,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5faf026f-af39-4c78-be55-df6bbcb8d004/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:08:13,587 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:08:13,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:08:13,587 INFO L85 PathProgramCache]: Analyzing trace with hash 2070463260, now seen corresponding path program 5 times [2021-11-03 05:08:13,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:08:13,587 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149222099] [2021-11-03 05:08:13,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:08:13,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:08:13,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:08:14,680 INFO L134 CoverageAnalysis]: Checked inductivity of 42050 backedges. 7579 proven. 406 refuted. 0 times theorem prover too weak. 34065 trivial. 0 not checked. [2021-11-03 05:08:14,680 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:08:14,680 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149222099] [2021-11-03 05:08:14,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149222099] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 05:08:14,680 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831435113] [2021-11-03 05:08:14,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 05:08:14,681 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:08:14,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5faf026f-af39-4c78-be55-df6bbcb8d004/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:08:14,683 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5faf026f-af39-4c78-be55-df6bbcb8d004/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 05:08:14,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5faf026f-af39-4c78-be55-df6bbcb8d004/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-03 05:08:20,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 31 check-sat command(s) [2021-11-03 05:08:20,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 05:08:20,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 63 conjunts are in the unsatisfiable core [2021-11-03 05:08:20,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:08:21,428 INFO L134 CoverageAnalysis]: Checked inductivity of 42050 backedges. 7597 proven. 406 refuted. 0 times theorem prover too weak. 34047 trivial. 0 not checked. [2021-11-03 05:08:21,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:08:22,294 INFO L134 CoverageAnalysis]: Checked inductivity of 42050 backedges. 7597 proven. 315 refuted. 0 times theorem prover too weak. 34138 trivial. 0 not checked. [2021-11-03 05:08:22,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831435113] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:08:22,295 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1905726539] [2021-11-03 05:08:22,297 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-03 05:08:22,297 INFO L166 IcfgInterpreter]: Building call graph [2021-11-03 05:08:22,297 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-03 05:08:22,297 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-03 05:08:22,298 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-03 05:08:22,301 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:08:22,302 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 05:08:22,303 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:08:22,303 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-03 05:08:22,304 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 05:08:22,304 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:08:22,305 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-03 05:08:22,306 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 131 [2021-11-03 05:08:22,309 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_14|], 21=[|v_#valid_15|]} [2021-11-03 05:08:22,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:08:22,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:08:22,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:08:22,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-03 05:08:22,320 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:08:22,320 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-03 05:08:22,320 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:08:22,321 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-03 05:08:22,321 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-03 05:08:22,322 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:08:22,325 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:08:22,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:08:22,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:08:22,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:08:22,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:08:22,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:08:22,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:08:22,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:08:22,349 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-03 05:08:22,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 34 [2021-11-03 05:08:22,350 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:08:22,352 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-11-03 05:08:22,352 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:08:22,353 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-11-03 05:08:22,353 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-03 05:08:22,353 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:08:22,357 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:08:22,358 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:08:22,359 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 107 [2021-11-03 05:08:22,360 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-03 05:08:22,360 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:128, output treesize:107 [2021-11-03 05:08:22,363 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:08:22,365 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 112 [2021-11-03 05:08:22,368 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:08:22,370 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 117 [2021-11-03 05:08:22,372 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:08:22,375 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 117 [2021-11-03 05:08:22,378 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:08:22,387 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:08:22,397 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:08:22,420 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:08:22,427 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 310 [2021-11-03 05:08:22,431 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:08:22,462 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:08:22,463 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:08:22,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:08:22,465 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:08:22,466 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:08:22,495 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:08:22,501 INFO L180 QuantifierPusher]: treesize reduction 48, result has 51.5 percent of original size [2021-11-03 05:08:22,502 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 47 [2021-11-03 05:08:22,506 INFO L180 QuantifierPusher]: treesize reduction 49, result has 56.3 percent of original size [2021-11-03 05:08:22,507 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 59 [2021-11-03 05:08:22,509 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:08:22,515 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:08:22,521 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:08:22,533 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:08:22,541 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 05:08:22,543 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:08:22,550 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 162 [2021-11-03 05:08:22,553 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 228 [2021-11-03 05:08:22,561 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:08:22,564 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 237 [2021-11-03 05:08:22,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:08:22,589 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:08:22,590 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:08:22,591 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:08:22,593 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:08:22,594 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:08:22,598 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:08:22,603 INFO L180 QuantifierPusher]: treesize reduction 42, result has 56.3 percent of original size [2021-11-03 05:08:22,604 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 50 [2021-11-03 05:08:22,608 INFO L180 QuantifierPusher]: treesize reduction 43, result has 60.6 percent of original size [2021-11-03 05:08:22,610 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 60 [2021-11-03 05:08:22,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:08:22,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:08:22,625 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:08:22,626 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:08:22,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:08:22,630 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:08:22,635 INFO L180 QuantifierPusher]: treesize reduction 42, result has 53.8 percent of original size [2021-11-03 05:08:22,636 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 45 [2021-11-03 05:08:22,638 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:08:22,639 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 45 [2021-11-03 05:08:22,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:08:22,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:08:22,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:08:22,655 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:08:22,659 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 148 [2021-11-03 05:08:22,661 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:08:22,675 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:08:22,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:08:22,677 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:08:22,678 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:08:22,679 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:08:22,682 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:08:22,687 INFO L180 QuantifierPusher]: treesize reduction 42, result has 54.8 percent of original size [2021-11-03 05:08:22,689 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 47 [2021-11-03 05:08:22,693 INFO L180 QuantifierPusher]: treesize reduction 43, result has 59.4 percent of original size [2021-11-03 05:08:22,694 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 57 [2021-11-03 05:08:22,698 INFO L180 QuantifierPusher]: treesize reduction 42, result has 53.8 percent of original size [2021-11-03 05:08:22,700 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 45 [2021-11-03 05:08:22,701 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:08:22,702 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 45 [2021-11-03 05:08:22,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:08:22,707 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:08:22,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:08:22,723 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:08:22,727 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 148 [2021-11-03 05:08:22,731 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:08:22,743 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:08:22,745 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:08:22,746 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:08:22,750 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:08:22,755 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:08:22,761 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:08:22,766 INFO L180 QuantifierPusher]: treesize reduction 42, result has 54.8 percent of original size [2021-11-03 05:08:22,767 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 47 [2021-11-03 05:08:22,774 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-03 05:08:23,902 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-03 05:08:23,902 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-03 05:08:23,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 32, 7] total 37 [2021-11-03 05:08:23,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676758081] [2021-11-03 05:08:23,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-03 05:08:23,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:08:23,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-03 05:08:23,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1654, Unknown=0, NotChecked=0, Total=1806 [2021-11-03 05:08:23,905 INFO L87 Difference]: Start difference. First operand 331 states and 342 transitions. Second operand has 37 states, 37 states have (on average 1.4594594594594594) internal successors, (54), 37 states have internal predecessors, (54), 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) [2021-11-03 05:08:24,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:08:24,795 INFO L93 Difference]: Finished difference Result 789 states and 853 transitions. [2021-11-03 05:08:24,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-03 05:08:24,796 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.4594594594594594) internal successors, (54), 37 states have internal predecessors, (54), 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 325 [2021-11-03 05:08:24,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:08:24,799 INFO L225 Difference]: With dead ends: 789 [2021-11-03 05:08:24,799 INFO L226 Difference]: Without dead ends: 450 [2021-11-03 05:08:24,801 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 1008 GetRequests, 961 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=168, Invalid=1994, Unknown=0, NotChecked=0, Total=2162 [2021-11-03 05:08:24,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-11-03 05:08:24,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 361. [2021-11-03 05:08:24,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 359 states have (on average 1.0919220055710306) internal successors, (392), 360 states have internal predecessors, (392), 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) [2021-11-03 05:08:24,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 392 transitions. [2021-11-03 05:08:24,880 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 392 transitions. Word has length 325 [2021-11-03 05:08:24,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:08:24,881 INFO L470 AbstractCegarLoop]: Abstraction has 361 states and 392 transitions. [2021-11-03 05:08:24,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.4594594594594594) internal successors, (54), 37 states have internal predecessors, (54), 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) [2021-11-03 05:08:24,881 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 392 transitions. [2021-11-03 05:08:24,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2021-11-03 05:08:24,887 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:08:24,887 INFO L513 BasicCegarLoop]: trace histogram [290, 10, 10, 10, 10, 1, 1, 1, 1, 1] [2021-11-03 05:08:24,898 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5faf026f-af39-4c78-be55-df6bbcb8d004/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-03 05:08:25,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable200,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5faf026f-af39-4c78-be55-df6bbcb8d004/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:08:25,098 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:08:25,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:08:25,099 INFO L85 PathProgramCache]: Analyzing trace with hash -118118406, now seen corresponding path program 6 times [2021-11-03 05:08:25,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:08:25,099 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751461768] [2021-11-03 05:08:25,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:08:25,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:08:25,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:08:26,164 INFO L134 CoverageAnalysis]: Checked inductivity of 44995 backedges. 8110 proven. 435 refuted. 0 times theorem prover too weak. 36450 trivial. 0 not checked. [2021-11-03 05:08:26,164 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:08:26,164 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751461768] [2021-11-03 05:08:26,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751461768] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 05:08:26,164 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5647275] [2021-11-03 05:08:26,165 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-03 05:08:26,165 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:08:26,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5faf026f-af39-4c78-be55-df6bbcb8d004/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:08:26,166 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5faf026f-af39-4c78-be55-df6bbcb8d004/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 05:08:26,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5faf026f-af39-4c78-be55-df6bbcb8d004/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-03 05:08:26,897 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-03 05:08:26,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 05:08:26,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 1030 conjuncts, 61 conjunts are in the unsatisfiable core [2021-11-03 05:08:26,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:08:27,804 INFO L134 CoverageAnalysis]: Checked inductivity of 44995 backedges. 20766 proven. 435 refuted. 0 times theorem prover too weak. 23794 trivial. 0 not checked. [2021-11-03 05:08:27,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:08:29,999 INFO L134 CoverageAnalysis]: Checked inductivity of 44995 backedges. 20766 proven. 435 refuted. 0 times theorem prover too weak. 23794 trivial. 0 not checked. [2021-11-03 05:08:29,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5647275] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:08:30,000 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1279977492] [2021-11-03 05:08:30,002 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-03 05:08:30,002 INFO L166 IcfgInterpreter]: Building call graph [2021-11-03 05:08:30,002 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-03 05:08:30,002 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-03 05:08:30,003 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-03 05:08:30,006 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:08:30,007 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 05:08:30,008 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:08:30,008 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-03 05:08:30,008 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 05:08:30,009 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:08:30,009 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-03 05:08:30,010 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 131 [2021-11-03 05:08:30,013 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_15|], 21=[|v_#valid_16|]} [2021-11-03 05:08:30,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:08:30,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:08:30,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:08:30,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-03 05:08:30,023 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:08:30,024 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-03 05:08:30,024 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:08:30,024 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-03 05:08:30,025 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-03 05:08:30,025 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:08:30,028 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:08:30,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:08:30,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:08:30,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:08:30,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:08:30,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:08:30,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:08:30,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:08:30,059 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-03 05:08:30,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 34 [2021-11-03 05:08:30,060 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:08:30,061 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-11-03 05:08:30,062 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:08:30,063 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-11-03 05:08:30,063 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-03 05:08:30,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:08:30,067 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:08:30,068 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:08:30,070 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 107 [2021-11-03 05:08:30,070 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-03 05:08:30,070 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:128, output treesize:107 [2021-11-03 05:08:30,074 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:08:30,080 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 112 [2021-11-03 05:08:30,082 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:08:30,084 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 117 [2021-11-03 05:08:30,087 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:08:30,089 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 126 [2021-11-03 05:08:30,091 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:08:30,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:08:30,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:08:30,137 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:08:30,143 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 317 [2021-11-03 05:08:30,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:08:30,191 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:08:30,194 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:08:30,195 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:08:30,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:08:30,197 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:08:30,201 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:08:30,206 INFO L180 QuantifierPusher]: treesize reduction 48, result has 51.5 percent of original size [2021-11-03 05:08:30,207 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 47 [2021-11-03 05:08:30,213 INFO L180 QuantifierPusher]: treesize reduction 49, result has 56.3 percent of original size [2021-11-03 05:08:30,214 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 57 [2021-11-03 05:08:30,217 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:08:30,223 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:08:30,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:08:30,241 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:08:30,248 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 05:08:30,250 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:08:30,256 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 162 [2021-11-03 05:08:30,259 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 228 [2021-11-03 05:08:30,262 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:08:30,266 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 228 [2021-11-03 05:08:30,271 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:08:30,290 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:08:30,294 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:08:30,295 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:08:30,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:08:30,297 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:08:30,301 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:08:30,308 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:08:30,310 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 126 [2021-11-03 05:08:30,313 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:08:30,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:08:30,325 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:08:30,326 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:08:30,327 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:08:30,327 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:08:30,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:08:30,338 INFO L180 QuantifierPusher]: treesize reduction 42, result has 56.3 percent of original size [2021-11-03 05:08:30,340 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 50 [2021-11-03 05:08:30,343 INFO L180 QuantifierPusher]: treesize reduction 43, result has 60.6 percent of original size [2021-11-03 05:08:30,345 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 60 [2021-11-03 05:08:30,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:08:30,358 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:08:30,359 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:08:30,360 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:08:30,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:08:30,363 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:08:30,369 INFO L180 QuantifierPusher]: treesize reduction 42, result has 53.8 percent of original size [2021-11-03 05:08:30,376 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 45 [2021-11-03 05:08:30,377 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:08:30,378 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 54 [2021-11-03 05:08:30,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:08:30,383 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:08:30,387 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:08:30,394 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:08:30,397 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 155 [2021-11-03 05:08:30,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:08:30,413 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:08:30,414 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:08:30,415 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:08:30,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:08:30,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:08:30,419 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:08:30,423 INFO L180 QuantifierPusher]: treesize reduction 42, result has 54.8 percent of original size [2021-11-03 05:08:30,425 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 47 [2021-11-03 05:08:30,428 INFO L180 QuantifierPusher]: treesize reduction 43, result has 59.4 percent of original size [2021-11-03 05:08:30,429 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 57 [2021-11-03 05:08:30,441 INFO L180 QuantifierPusher]: treesize reduction 42, result has 53.8 percent of original size [2021-11-03 05:08:30,442 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 45 [2021-11-03 05:08:30,443 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:08:30,444 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 45 [2021-11-03 05:08:30,446 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:08:30,449 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:08:30,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:08:30,459 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:08:30,462 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 148 [2021-11-03 05:08:30,466 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:08:30,478 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:08:30,479 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:08:30,479 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:08:30,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:08:30,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:08:30,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:08:30,488 INFO L180 QuantifierPusher]: treesize reduction 42, result has 54.8 percent of original size [2021-11-03 05:08:30,489 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 47 [2021-11-03 05:08:30,500 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-03 05:08:31,636 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-03 05:08:31,637 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-03 05:08:31,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 63 [2021-11-03 05:08:31,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671321135] [2021-11-03 05:08:31,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-11-03 05:08:31,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:08:31,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-11-03 05:08:31,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1134, Invalid=3558, Unknown=0, NotChecked=0, Total=4692 [2021-11-03 05:08:31,641 INFO L87 Difference]: Start difference. First operand 361 states and 392 transitions. Second operand has 63 states, 63 states have (on average 1.253968253968254) internal successors, (79), 63 states have internal predecessors, (79), 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) [2021-11-03 05:09:22,716 WARN L207 SmtUtils]: Spent 6.52 s on a formula simplification. DAG size of input: 118 DAG size of output: 10 [2021-11-03 05:15:51,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:15:51,438 INFO L93 Difference]: Finished difference Result 1041 states and 1343 transitions. [2021-11-03 05:15:51,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-11-03 05:15:51,439 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.253968253968254) internal successors, (79), 63 states have internal predecessors, (79), 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 335 [2021-11-03 05:15:51,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:15:51,443 INFO L225 Difference]: With dead ends: 1041 [2021-11-03 05:15:51,444 INFO L226 Difference]: Without dead ends: 682 [2021-11-03 05:15:51,448 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 1064 GetRequests, 967 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 936 ImplicationChecksByTransitivity, 442.2s TimeCoverageRelationStatistics Valid=2979, Invalid=6516, Unknown=11, NotChecked=0, Total=9506 [2021-11-03 05:15:51,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2021-11-03 05:15:51,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 681. [2021-11-03 05:15:51,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 681 states, 679 states have (on average 1.04860088365243) internal successors, (712), 680 states have internal predecessors, (712), 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) [2021-11-03 05:15:51,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 712 transitions. [2021-11-03 05:15:51,567 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 712 transitions. Word has length 335 [2021-11-03 05:15:51,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:15:51,567 INFO L470 AbstractCegarLoop]: Abstraction has 681 states and 712 transitions. [2021-11-03 05:15:51,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.253968253968254) internal successors, (79), 63 states have internal predecessors, (79), 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) [2021-11-03 05:15:51,568 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 712 transitions. [2021-11-03 05:15:51,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 656 [2021-11-03 05:15:51,585 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:15:51,586 INFO L513 BasicCegarLoop]: trace histogram [610, 10, 10, 10, 10, 1, 1, 1, 1, 1] [2021-11-03 05:15:51,625 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5faf026f-af39-4c78-be55-df6bbcb8d004/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-03 05:15:51,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5faf026f-af39-4c78-be55-df6bbcb8d004/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable249 [2021-11-03 05:15:51,804 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:15:51,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:15:51,804 INFO L85 PathProgramCache]: Analyzing trace with hash 340492282, now seen corresponding path program 7 times [2021-11-03 05:15:51,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:15:51,804 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139746805] [2021-11-03 05:15:51,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:15:51,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:15:52,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:15:54,965 INFO L134 CoverageAnalysis]: Checked inductivity of 192035 backedges. 34606 proven. 1891 refuted. 0 times theorem prover too weak. 155538 trivial. 0 not checked. [2021-11-03 05:15:54,966 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:15:54,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139746805] [2021-11-03 05:15:54,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139746805] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 05:15:54,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274222693] [2021-11-03 05:15:54,966 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-03 05:15:54,966 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:15:54,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5faf026f-af39-4c78-be55-df6bbcb8d004/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:15:54,988 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5faf026f-af39-4c78-be55-df6bbcb8d004/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 05:15:54,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5faf026f-af39-4c78-be55-df6bbcb8d004/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-03 05:15:56,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:15:56,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 1990 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-03 05:15:56,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:15:58,583 INFO L134 CoverageAnalysis]: Checked inductivity of 192035 backedges. 0 proven. 173125 refuted. 0 times theorem prover too weak. 18910 trivial. 0 not checked. [2021-11-03 05:15:58,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:16:01,185 INFO L134 CoverageAnalysis]: Checked inductivity of 192035 backedges. 0 proven. 173125 refuted. 0 times theorem prover too weak. 18910 trivial. 0 not checked. [2021-11-03 05:16:01,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274222693] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:16:01,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1409791593] [2021-11-03 05:16:01,188 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-03 05:16:01,188 INFO L166 IcfgInterpreter]: Building call graph [2021-11-03 05:16:01,188 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-03 05:16:01,188 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-03 05:16:01,189 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-03 05:16:01,194 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:16:01,195 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 05:16:01,196 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:16:01,196 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-03 05:16:01,197 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 05:16:01,197 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:16:01,197 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-03 05:16:01,199 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 131 [2021-11-03 05:16:01,202 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_16|], 21=[|v_#valid_17|]} [2021-11-03 05:16:01,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:16:01,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:16:01,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:16:01,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-03 05:16:01,213 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:16:01,214 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-03 05:16:01,214 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:16:01,215 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-03 05:16:01,215 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-03 05:16:01,215 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:16:01,218 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:16:01,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:16:01,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:16:01,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:16:01,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:16:01,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:16:01,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:16:01,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:16:01,244 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-03 05:16:01,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 34 [2021-11-03 05:16:01,245 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:16:01,247 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-11-03 05:16:01,248 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:16:01,248 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-11-03 05:16:01,249 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-03 05:16:01,249 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:16:01,252 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:16:01,253 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:16:01,255 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 107 [2021-11-03 05:16:01,255 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-03 05:16:01,256 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:128, output treesize:107 [2021-11-03 05:16:01,259 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:16:01,261 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 112 [2021-11-03 05:16:01,264 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:16:01,267 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 117 [2021-11-03 05:16:01,269 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:16:01,271 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 117 [2021-11-03 05:16:01,274 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:16:01,283 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:16:01,293 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:16:01,313 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:16:01,319 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 310 [2021-11-03 05:16:01,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:16:01,353 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:16:01,354 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:16:01,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:16:01,357 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:16:01,358 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:16:01,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:16:01,370 INFO L180 QuantifierPusher]: treesize reduction 48, result has 51.5 percent of original size [2021-11-03 05:16:01,372 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 47 [2021-11-03 05:16:01,377 INFO L180 QuantifierPusher]: treesize reduction 49, result has 56.3 percent of original size [2021-11-03 05:16:01,378 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 57 [2021-11-03 05:16:01,381 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:16:01,387 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:16:01,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:16:01,406 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:16:01,420 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 05:16:01,422 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:16:01,436 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 162 [2021-11-03 05:16:01,439 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 228 [2021-11-03 05:16:01,443 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:16:01,447 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 237 [2021-11-03 05:16:01,451 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:16:01,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:16:01,474 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:16:01,475 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:16:01,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:16:01,477 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:16:01,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:16:01,488 INFO L180 QuantifierPusher]: treesize reduction 42, result has 56.3 percent of original size [2021-11-03 05:16:01,489 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 50 [2021-11-03 05:16:01,493 INFO L180 QuantifierPusher]: treesize reduction 43, result has 60.6 percent of original size [2021-11-03 05:16:01,503 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 60 [2021-11-03 05:16:01,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:16:01,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:16:01,521 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:16:01,522 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:16:01,523 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:16:01,525 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:16:01,530 INFO L180 QuantifierPusher]: treesize reduction 42, result has 53.8 percent of original size [2021-11-03 05:16:01,532 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 45 [2021-11-03 05:16:01,533 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:16:01,534 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 45 [2021-11-03 05:16:01,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:16:01,539 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:16:01,543 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:16:01,551 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:16:01,554 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 148 [2021-11-03 05:16:01,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:16:01,570 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:16:01,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:16:01,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:16:01,573 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:16:01,574 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:16:01,577 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:16:01,582 INFO L180 QuantifierPusher]: treesize reduction 42, result has 54.8 percent of original size [2021-11-03 05:16:01,583 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 47 [2021-11-03 05:16:01,589 INFO L180 QuantifierPusher]: treesize reduction 43, result has 59.4 percent of original size [2021-11-03 05:16:01,591 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 57 [2021-11-03 05:16:01,595 INFO L180 QuantifierPusher]: treesize reduction 42, result has 53.8 percent of original size [2021-11-03 05:16:01,597 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 45 [2021-11-03 05:16:01,598 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:16:01,599 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 45 [2021-11-03 05:16:01,601 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:16:01,604 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:16:01,608 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:16:01,613 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:16:01,618 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 148 [2021-11-03 05:16:01,621 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:16:01,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:16:01,633 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:16:01,634 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:16:01,635 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:16:01,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:16:01,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:16:01,644 INFO L180 QuantifierPusher]: treesize reduction 42, result has 54.8 percent of original size [2021-11-03 05:16:01,646 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 47 [2021-11-03 05:16:01,654 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-03 05:16:03,134 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-03 05:16:03,134 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-03 05:16:03,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 13, 13] total 86 [2021-11-03 05:16:03,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35222509] [2021-11-03 05:16:03,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2021-11-03 05:16:03,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:16:03,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-11-03 05:16:03,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=384, Invalid=7988, Unknown=0, NotChecked=0, Total=8372 [2021-11-03 05:16:03,139 INFO L87 Difference]: Start difference. First operand 681 states and 712 transitions. Second operand has 86 states, 86 states have (on average 2.058139534883721) internal successors, (177), 86 states have internal predecessors, (177), 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)