./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/openssl/s3_srvr.blast.06.i.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.06.i.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P --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 61a0aa66b71092ec74a73b9f534556f5bbb6f25851e8b5ad307fc7dd7f051667 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 23:12:42,778 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 23:12:42,780 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 23:12:42,812 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 23:12:42,813 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 23:12:42,816 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 23:12:42,821 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 23:12:42,825 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 23:12:42,832 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 23:12:42,833 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 23:12:42,834 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 23:12:42,835 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 23:12:42,836 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 23:12:42,837 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 23:12:42,838 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 23:12:42,840 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 23:12:42,841 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 23:12:42,842 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 23:12:42,844 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 23:12:42,847 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 23:12:42,848 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 23:12:42,850 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 23:12:42,851 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 23:12:42,852 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 23:12:42,856 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 23:12:42,856 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 23:12:42,857 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 23:12:42,858 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 23:12:42,858 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 23:12:42,859 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 23:12:42,860 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 23:12:42,861 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 23:12:42,861 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 23:12:42,862 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 23:12:42,864 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 23:12:42,864 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 23:12:42,865 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 23:12:42,865 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 23:12:42,865 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 23:12:42,866 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 23:12:42,867 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 23:12:42,868 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-20 23:12:42,893 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 23:12:42,894 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 23:12:42,894 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 23:12:42,897 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 23:12:42,901 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 23:12:42,901 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 23:12:42,901 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-20 23:12:42,901 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-20 23:12:42,901 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-20 23:12:42,902 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-20 23:12:42,902 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-20 23:12:42,902 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-20 23:12:42,902 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-20 23:12:42,902 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-20 23:12:42,902 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-20 23:12:42,903 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-20 23:12:42,903 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-20 23:12:42,903 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-20 23:12:42,904 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 23:12:42,904 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 23:12:42,904 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 23:12:42,904 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 23:12:42,905 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 23:12:42,905 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 23:12:42,905 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 23:12:42,905 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 23:12:42,905 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 23:12:42,905 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 23:12:42,906 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 23:12:42,906 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 23:12:42,906 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 23:12:42,906 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 23:12:42,906 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:12:42,907 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 23:12:42,907 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 23:12:42,907 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 23:12:42,907 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-20 23:12:42,907 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 23:12:42,908 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 23:12:42,908 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 23:12:42,908 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 23:12:42,908 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_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 61a0aa66b71092ec74a73b9f534556f5bbb6f25851e8b5ad307fc7dd7f051667 [2021-11-20 23:12:43,200 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 23:12:43,224 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 23:12:43,226 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 23:12:43,227 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 23:12:43,228 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 23:12:43,229 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/openssl/s3_srvr.blast.06.i.cil-2.c [2021-11-20 23:12:43,300 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/data/a2e680aa8/5ad303ec551147278ed07dae85b6727a/FLAGa5ff77447 [2021-11-20 23:12:43,876 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 23:12:43,877 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/sv-benchmarks/c/openssl/s3_srvr.blast.06.i.cil-2.c [2021-11-20 23:12:43,907 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/data/a2e680aa8/5ad303ec551147278ed07dae85b6727a/FLAGa5ff77447 [2021-11-20 23:12:44,101 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/data/a2e680aa8/5ad303ec551147278ed07dae85b6727a [2021-11-20 23:12:44,103 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 23:12:44,105 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 23:12:44,106 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 23:12:44,107 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 23:12:44,110 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 23:12:44,111 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:12:44" (1/1) ... [2021-11-20 23:12:44,112 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25546805 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:12:44, skipping insertion in model container [2021-11-20 23:12:44,112 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:12:44" (1/1) ... [2021-11-20 23:12:44,119 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 23:12:44,193 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 23:12:44,637 WARN L230 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_6fabedbc-0513-4804-bc37-4a4ef542450f/sv-benchmarks/c/openssl/s3_srvr.blast.06.i.cil-2.c[78808,78821] [2021-11-20 23:12:44,661 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:12:44,674 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 23:12:44,858 WARN L230 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_6fabedbc-0513-4804-bc37-4a4ef542450f/sv-benchmarks/c/openssl/s3_srvr.blast.06.i.cil-2.c[78808,78821] [2021-11-20 23:12:44,861 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:12:44,882 INFO L208 MainTranslator]: Completed translation [2021-11-20 23:12:44,882 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:12:44 WrapperNode [2021-11-20 23:12:44,882 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 23:12:44,884 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 23:12:44,884 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 23:12:44,884 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 23:12:44,891 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:12:44" (1/1) ... [2021-11-20 23:12:44,931 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:12:44" (1/1) ... [2021-11-20 23:12:44,994 INFO L137 Inliner]: procedures = 31, calls = 223, calls flagged for inlining = 7, calls inlined = 3, statements flattened = 816 [2021-11-20 23:12:44,994 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 23:12:44,995 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 23:12:44,995 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 23:12:44,996 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 23:12:45,004 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:12:44" (1/1) ... [2021-11-20 23:12:45,004 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:12:44" (1/1) ... [2021-11-20 23:12:45,013 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:12:44" (1/1) ... [2021-11-20 23:12:45,014 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:12:44" (1/1) ... [2021-11-20 23:12:45,085 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:12:44" (1/1) ... [2021-11-20 23:12:45,107 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:12:44" (1/1) ... [2021-11-20 23:12:45,110 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:12:44" (1/1) ... [2021-11-20 23:12:45,125 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 23:12:45,126 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 23:12:45,126 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 23:12:45,126 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 23:12:45,128 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:12:44" (1/1) ... [2021-11-20 23:12:45,136 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:12:45,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:12:45,163 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 23:12:45,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 23:12:45,214 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 23:12:45,215 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-20 23:12:45,215 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 23:12:45,215 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 23:12:45,215 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-20 23:12:45,216 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 23:12:45,216 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 23:12:45,216 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 23:12:45,216 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 23:12:45,446 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 23:12:45,447 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 23:12:45,464 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-20 23:12:48,439 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2021-11-20 23:12:48,440 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2021-11-20 23:12:48,440 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 23:12:48,928 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 23:12:48,928 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-20 23:12:48,935 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:12:48 BoogieIcfgContainer [2021-11-20 23:12:48,935 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 23:12:48,939 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 23:12:48,939 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 23:12:48,943 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 23:12:48,943 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:12:44" (1/3) ... [2021-11-20 23:12:48,944 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ff34cb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:12:48, skipping insertion in model container [2021-11-20 23:12:48,944 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:12:44" (2/3) ... [2021-11-20 23:12:48,945 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ff34cb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:12:48, skipping insertion in model container [2021-11-20 23:12:48,945 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:12:48" (3/3) ... [2021-11-20 23:12:48,946 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.06.i.cil-2.c [2021-11-20 23:12:48,952 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 23:12:48,952 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 23:12:49,020 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 23:12:49,032 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 [2021-11-20 23:12:49,032 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 23:12:49,060 INFO L276 IsEmpty]: Start isEmpty. Operand has 112 states, 110 states have (on average 1.7636363636363637) internal successors, (194), 111 states have internal predecessors, (194), 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) [2021-11-20 23:12:49,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-20 23:12:49,070 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:12:49,071 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:12:49,071 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:12:49,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:12:49,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1918518117, now seen corresponding path program 1 times [2021-11-20 23:12:49,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:12:49,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095642225] [2021-11-20 23:12:49,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:12:49,087 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:12:49,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:12:49,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:12:49,554 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:12:49,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095642225] [2021-11-20 23:12:49,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095642225] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:12:49,556 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:12:49,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:12:49,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266003530] [2021-11-20 23:12:49,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:12:49,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:12:49,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:12:49,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:12:49,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:12:49,637 INFO L87 Difference]: Start difference. First operand has 112 states, 110 states have (on average 1.7636363636363637) internal successors, (194), 111 states have internal predecessors, (194), 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 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 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) [2021-11-20 23:12:51,663 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:12:52,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:12:52,211 INFO L93 Difference]: Finished difference Result 247 states and 428 transitions. [2021-11-20 23:12:52,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:12:52,215 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 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 39 [2021-11-20 23:12:52,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:12:52,224 INFO L225 Difference]: With dead ends: 247 [2021-11-20 23:12:52,224 INFO L226 Difference]: Without dead ends: 131 [2021-11-20 23:12:52,227 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:12:52,229 INFO L933 BasicCegarLoop]: 150 mSDtfsCounter, 20 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 11 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-20 23:12:52,230 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 397 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 174 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2021-11-20 23:12:52,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-11-20 23:12:52,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 119. [2021-11-20 23:12:52,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 1.5508474576271187) internal successors, (183), 118 states have internal predecessors, (183), 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) [2021-11-20 23:12:52,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 183 transitions. [2021-11-20 23:12:52,276 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 183 transitions. Word has length 39 [2021-11-20 23:12:52,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:12:52,276 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 183 transitions. [2021-11-20 23:12:52,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 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) [2021-11-20 23:12:52,277 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 183 transitions. [2021-11-20 23:12:52,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-20 23:12:52,279 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:12:52,280 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:12:52,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 23:12:52,280 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:12:52,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:12:52,281 INFO L85 PathProgramCache]: Analyzing trace with hash -737680906, now seen corresponding path program 1 times [2021-11-20 23:12:52,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:12:52,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214386415] [2021-11-20 23:12:52,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:12:52,282 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:12:52,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:12:52,432 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:12:52,432 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:12:52,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214386415] [2021-11-20 23:12:52,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214386415] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:12:52,433 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:12:52,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:12:52,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909222251] [2021-11-20 23:12:52,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:12:52,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:12:52,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:12:52,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:12:52,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:12:52,436 INFO L87 Difference]: Start difference. First operand 119 states and 183 transitions. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 3 states have internal predecessors, (49), 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) [2021-11-20 23:12:54,448 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:12:54,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:12:54,833 INFO L93 Difference]: Finished difference Result 238 states and 360 transitions. [2021-11-20 23:12:54,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:12:54,835 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 3 states have internal predecessors, (49), 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 49 [2021-11-20 23:12:54,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:12:54,837 INFO L225 Difference]: With dead ends: 238 [2021-11-20 23:12:54,837 INFO L226 Difference]: Without dead ends: 131 [2021-11-20 23:12:54,838 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:12:54,839 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 19 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 23:12:54,840 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 329 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 162 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-20 23:12:54,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-11-20 23:12:54,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 119. [2021-11-20 23:12:54,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 1.5423728813559323) internal successors, (182), 118 states have internal predecessors, (182), 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) [2021-11-20 23:12:54,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 182 transitions. [2021-11-20 23:12:54,869 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 182 transitions. Word has length 49 [2021-11-20 23:12:54,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:12:54,870 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 182 transitions. [2021-11-20 23:12:54,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 3 states have internal predecessors, (49), 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) [2021-11-20 23:12:54,870 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 182 transitions. [2021-11-20 23:12:54,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-20 23:12:54,874 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:12:54,874 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:12:54,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 23:12:54,875 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:12:54,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:12:54,876 INFO L85 PathProgramCache]: Analyzing trace with hash 429508315, now seen corresponding path program 1 times [2021-11-20 23:12:54,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:12:54,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517133672] [2021-11-20 23:12:54,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:12:54,877 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:12:54,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:12:55,007 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:12:55,008 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:12:55,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517133672] [2021-11-20 23:12:55,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517133672] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:12:55,008 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:12:55,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:12:55,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100926222] [2021-11-20 23:12:55,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:12:55,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:12:55,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:12:55,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:12:55,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:12:55,011 INFO L87 Difference]: Start difference. First operand 119 states and 182 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 3 states have internal predecessors, (50), 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) [2021-11-20 23:12:57,044 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:12:57,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:12:57,394 INFO L93 Difference]: Finished difference Result 238 states and 359 transitions. [2021-11-20 23:12:57,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:12:57,395 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 3 states have internal predecessors, (50), 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 50 [2021-11-20 23:12:57,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:12:57,397 INFO L225 Difference]: With dead ends: 238 [2021-11-20 23:12:57,397 INFO L226 Difference]: Without dead ends: 131 [2021-11-20 23:12:57,398 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:12:57,399 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 17 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 23:12:57,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 328 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 163 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-20 23:12:57,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-11-20 23:12:57,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 119. [2021-11-20 23:12:57,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 1.5338983050847457) internal successors, (181), 118 states have internal predecessors, (181), 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) [2021-11-20 23:12:57,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 181 transitions. [2021-11-20 23:12:57,410 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 181 transitions. Word has length 50 [2021-11-20 23:12:57,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:12:57,410 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 181 transitions. [2021-11-20 23:12:57,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 3 states have internal predecessors, (50), 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) [2021-11-20 23:12:57,414 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 181 transitions. [2021-11-20 23:12:57,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-20 23:12:57,424 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:12:57,424 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:12:57,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 23:12:57,425 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:12:57,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:12:57,425 INFO L85 PathProgramCache]: Analyzing trace with hash -277270841, now seen corresponding path program 1 times [2021-11-20 23:12:57,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:12:57,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216488920] [2021-11-20 23:12:57,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:12:57,427 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:12:57,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:12:57,547 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:12:57,547 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:12:57,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216488920] [2021-11-20 23:12:57,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216488920] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:12:57,551 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:12:57,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:12:57,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700037007] [2021-11-20 23:12:57,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:12:57,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:12:57,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:12:57,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:12:57,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:12:57,553 INFO L87 Difference]: Start difference. First operand 119 states and 181 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 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) [2021-11-20 23:12:59,565 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:12:59,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:12:59,892 INFO L93 Difference]: Finished difference Result 238 states and 358 transitions. [2021-11-20 23:12:59,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:12:59,893 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 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 51 [2021-11-20 23:12:59,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:12:59,894 INFO L225 Difference]: With dead ends: 238 [2021-11-20 23:12:59,894 INFO L226 Difference]: Without dead ends: 131 [2021-11-20 23:12:59,895 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:12:59,897 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 15 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 23:12:59,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 328 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 163 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 23:12:59,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-11-20 23:12:59,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 119. [2021-11-20 23:12:59,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 1.5254237288135593) internal successors, (180), 118 states have internal predecessors, (180), 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) [2021-11-20 23:12:59,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 180 transitions. [2021-11-20 23:12:59,908 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 180 transitions. Word has length 51 [2021-11-20 23:12:59,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:12:59,908 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 180 transitions. [2021-11-20 23:12:59,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 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) [2021-11-20 23:12:59,908 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 180 transitions. [2021-11-20 23:12:59,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-20 23:12:59,909 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:12:59,909 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:12:59,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 23:12:59,910 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:12:59,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:12:59,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1645382160, now seen corresponding path program 1 times [2021-11-20 23:12:59,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:12:59,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142497044] [2021-11-20 23:12:59,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:12:59,911 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:12:59,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:12:59,979 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:12:59,979 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:12:59,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142497044] [2021-11-20 23:12:59,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142497044] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:12:59,979 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:12:59,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:12:59,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510872304] [2021-11-20 23:12:59,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:12:59,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:12:59,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:12:59,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:12:59,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:12:59,981 INFO L87 Difference]: Start difference. First operand 119 states and 180 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 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) [2021-11-20 23:13:01,992 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:13:02,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:13:02,307 INFO L93 Difference]: Finished difference Result 238 states and 357 transitions. [2021-11-20 23:13:02,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:13:02,308 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 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 51 [2021-11-20 23:13:02,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:13:02,309 INFO L225 Difference]: With dead ends: 238 [2021-11-20 23:13:02,309 INFO L226 Difference]: Without dead ends: 131 [2021-11-20 23:13:02,310 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:13:02,311 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 11 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 23:13:02,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 328 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 163 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 23:13:02,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-11-20 23:13:02,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 119. [2021-11-20 23:13:02,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 1.5169491525423728) internal successors, (179), 118 states have internal predecessors, (179), 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) [2021-11-20 23:13:02,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 179 transitions. [2021-11-20 23:13:02,324 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 179 transitions. Word has length 51 [2021-11-20 23:13:02,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:13:02,325 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 179 transitions. [2021-11-20 23:13:02,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 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) [2021-11-20 23:13:02,325 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 179 transitions. [2021-11-20 23:13:02,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-20 23:13:02,326 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:13:02,326 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:13:02,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 23:13:02,326 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:13:02,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:13:02,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1009079523, now seen corresponding path program 1 times [2021-11-20 23:13:02,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:13:02,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140056141] [2021-11-20 23:13:02,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:13:02,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:13:02,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:13:02,397 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:13:02,397 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:13:02,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140056141] [2021-11-20 23:13:02,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140056141] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:13:02,398 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:13:02,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:13:02,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71529743] [2021-11-20 23:13:02,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:13:02,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:13:02,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:13:02,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:13:02,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:13:02,400 INFO L87 Difference]: Start difference. First operand 119 states and 179 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 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) [2021-11-20 23:13:04,411 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:13:04,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:13:04,756 INFO L93 Difference]: Finished difference Result 238 states and 356 transitions. [2021-11-20 23:13:04,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:13:04,757 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 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 51 [2021-11-20 23:13:04,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:13:04,759 INFO L225 Difference]: With dead ends: 238 [2021-11-20 23:13:04,759 INFO L226 Difference]: Without dead ends: 131 [2021-11-20 23:13:04,759 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:13:04,760 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 9 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 23:13:04,761 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 329 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 162 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 23:13:04,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-11-20 23:13:04,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 119. [2021-11-20 23:13:04,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 1.5084745762711864) internal successors, (178), 118 states have internal predecessors, (178), 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) [2021-11-20 23:13:04,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 178 transitions. [2021-11-20 23:13:04,768 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 178 transitions. Word has length 51 [2021-11-20 23:13:04,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:13:04,769 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 178 transitions. [2021-11-20 23:13:04,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 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) [2021-11-20 23:13:04,769 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 178 transitions. [2021-11-20 23:13:04,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-20 23:13:04,770 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:13:04,771 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:13:04,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-20 23:13:04,771 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:13:04,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:13:04,772 INFO L85 PathProgramCache]: Analyzing trace with hash 897509604, now seen corresponding path program 1 times [2021-11-20 23:13:04,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:13:04,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222587213] [2021-11-20 23:13:04,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:13:04,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:13:04,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:13:04,833 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:13:04,834 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:13:04,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222587213] [2021-11-20 23:13:04,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222587213] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:13:04,834 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:13:04,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:13:04,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140002709] [2021-11-20 23:13:04,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:13:04,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:13:04,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:13:04,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:13:04,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:13:04,836 INFO L87 Difference]: Start difference. First operand 119 states and 178 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 3 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) [2021-11-20 23:13:06,850 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:13:07,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:13:07,148 INFO L93 Difference]: Finished difference Result 236 states and 353 transitions. [2021-11-20 23:13:07,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:13:07,149 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 3 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) Word has length 52 [2021-11-20 23:13:07,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:13:07,150 INFO L225 Difference]: With dead ends: 236 [2021-11-20 23:13:07,150 INFO L226 Difference]: Without dead ends: 129 [2021-11-20 23:13:07,151 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:13:07,151 INFO L933 BasicCegarLoop]: 129 mSDtfsCounter, 9 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 23:13:07,152 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 332 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 159 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 23:13:07,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-11-20 23:13:07,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 119. [2021-11-20 23:13:07,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 1.5) internal successors, (177), 118 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) [2021-11-20 23:13:07,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 177 transitions. [2021-11-20 23:13:07,159 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 177 transitions. Word has length 52 [2021-11-20 23:13:07,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:13:07,159 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 177 transitions. [2021-11-20 23:13:07,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 3 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) [2021-11-20 23:13:07,159 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 177 transitions. [2021-11-20 23:13:07,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-20 23:13:07,160 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:13:07,160 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:13:07,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-20 23:13:07,161 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:13:07,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:13:07,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1960609910, now seen corresponding path program 1 times [2021-11-20 23:13:07,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:13:07,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196574194] [2021-11-20 23:13:07,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:13:07,162 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:13:07,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:13:07,220 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:13:07,220 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:13:07,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196574194] [2021-11-20 23:13:07,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196574194] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:13:07,221 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:13:07,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:13:07,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437807381] [2021-11-20 23:13:07,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:13:07,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:13:07,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:13:07,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:13:07,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:13:07,222 INFO L87 Difference]: Start difference. First operand 119 states and 177 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 3 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) [2021-11-20 23:13:09,233 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:13:09,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:13:09,540 INFO L93 Difference]: Finished difference Result 236 states and 352 transitions. [2021-11-20 23:13:09,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:13:09,542 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 3 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) Word has length 52 [2021-11-20 23:13:09,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:13:09,542 INFO L225 Difference]: With dead ends: 236 [2021-11-20 23:13:09,543 INFO L226 Difference]: Without dead ends: 129 [2021-11-20 23:13:09,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:13:09,544 INFO L933 BasicCegarLoop]: 129 mSDtfsCounter, 11 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 23:13:09,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 332 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 159 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 23:13:09,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-11-20 23:13:09,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 119. [2021-11-20 23:13:09,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 1.4915254237288136) internal successors, (176), 118 states have internal predecessors, (176), 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) [2021-11-20 23:13:09,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 176 transitions. [2021-11-20 23:13:09,550 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 176 transitions. Word has length 52 [2021-11-20 23:13:09,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:13:09,550 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 176 transitions. [2021-11-20 23:13:09,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 3 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) [2021-11-20 23:13:09,550 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 176 transitions. [2021-11-20 23:13:09,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-20 23:13:09,551 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:13:09,551 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:13:09,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-20 23:13:09,552 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:13:09,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:13:09,552 INFO L85 PathProgramCache]: Analyzing trace with hash 993667266, now seen corresponding path program 1 times [2021-11-20 23:13:09,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:13:09,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687840577] [2021-11-20 23:13:09,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:13:09,553 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:13:09,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:13:09,643 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:13:09,643 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:13:09,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687840577] [2021-11-20 23:13:09,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687840577] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:13:09,644 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:13:09,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:13:09,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594520076] [2021-11-20 23:13:09,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:13:09,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:13:09,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:13:09,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:13:09,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:13:09,646 INFO L87 Difference]: Start difference. First operand 119 states and 176 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 3 states have internal predecessors, (53), 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) [2021-11-20 23:13:11,659 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:13:11,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:13:11,911 INFO L93 Difference]: Finished difference Result 228 states and 341 transitions. [2021-11-20 23:13:11,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:13:11,912 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 3 states have internal predecessors, (53), 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 53 [2021-11-20 23:13:11,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:13:11,913 INFO L225 Difference]: With dead ends: 228 [2021-11-20 23:13:11,914 INFO L226 Difference]: Without dead ends: 121 [2021-11-20 23:13:11,914 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:13:11,915 INFO L933 BasicCegarLoop]: 134 mSDtfsCounter, 5 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 23:13:11,915 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 342 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 149 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 23:13:11,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-11-20 23:13:11,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 119. [2021-11-20 23:13:11,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 1.4830508474576272) internal successors, (175), 118 states have internal predecessors, (175), 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) [2021-11-20 23:13:11,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 175 transitions. [2021-11-20 23:13:11,922 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 175 transitions. Word has length 53 [2021-11-20 23:13:11,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:13:11,923 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 175 transitions. [2021-11-20 23:13:11,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 3 states have internal predecessors, (53), 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) [2021-11-20 23:13:11,923 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 175 transitions. [2021-11-20 23:13:11,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-20 23:13:11,924 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:13:11,924 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:13:11,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-20 23:13:11,925 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:13:11,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:13:11,925 INFO L85 PathProgramCache]: Analyzing trace with hash -885133653, now seen corresponding path program 1 times [2021-11-20 23:13:11,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:13:11,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449982681] [2021-11-20 23:13:11,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:13:11,926 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:13:11,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:13:12,002 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:13:12,002 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:13:12,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449982681] [2021-11-20 23:13:12,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449982681] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:13:12,003 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:13:12,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 23:13:12,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017654189] [2021-11-20 23:13:12,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:13:12,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:13:12,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:13:12,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:13:12,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:13:12,005 INFO L87 Difference]: Start difference. First operand 119 states and 175 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 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) [2021-11-20 23:13:14,018 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:13:14,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:13:14,350 INFO L93 Difference]: Finished difference Result 260 states and 389 transitions. [2021-11-20 23:13:14,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:13:14,352 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 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 54 [2021-11-20 23:13:14,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:13:14,353 INFO L225 Difference]: With dead ends: 260 [2021-11-20 23:13:14,353 INFO L226 Difference]: Without dead ends: 153 [2021-11-20 23:13:14,354 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:13:14,354 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 21 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 23:13:14,355 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 337 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 178 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 23:13:14,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-11-20 23:13:14,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 139. [2021-11-20 23:13:14,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 1.5144927536231885) internal successors, (209), 138 states have internal predecessors, (209), 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) [2021-11-20 23:13:14,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 209 transitions. [2021-11-20 23:13:14,361 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 209 transitions. Word has length 54 [2021-11-20 23:13:14,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:13:14,361 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 209 transitions. [2021-11-20 23:13:14,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 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) [2021-11-20 23:13:14,361 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 209 transitions. [2021-11-20 23:13:14,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-20 23:13:14,362 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:13:14,362 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:13:14,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-20 23:13:14,363 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:13:14,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:13:14,364 INFO L85 PathProgramCache]: Analyzing trace with hash 656059836, now seen corresponding path program 1 times [2021-11-20 23:13:14,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:13:14,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601111778] [2021-11-20 23:13:14,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:13:14,365 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:13:14,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:13:14,427 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:13:14,427 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:13:14,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601111778] [2021-11-20 23:13:14,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601111778] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:13:14,427 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:13:14,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 23:13:14,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817101726] [2021-11-20 23:13:14,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:13:14,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:13:14,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:13:14,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:13:14,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:13:14,429 INFO L87 Difference]: Start difference. First operand 139 states and 209 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 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) [2021-11-20 23:13:16,440 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:13:16,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:13:16,795 INFO L93 Difference]: Finished difference Result 280 states and 422 transitions. [2021-11-20 23:13:16,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:13:16,797 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 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 64 [2021-11-20 23:13:16,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:13:16,798 INFO L225 Difference]: With dead ends: 280 [2021-11-20 23:13:16,798 INFO L226 Difference]: Without dead ends: 153 [2021-11-20 23:13:16,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:13:16,799 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 32 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 23:13:16,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 339 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 175 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 23:13:16,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-11-20 23:13:16,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 139. [2021-11-20 23:13:16,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 1.5072463768115942) internal successors, (208), 138 states have internal predecessors, (208), 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) [2021-11-20 23:13:16,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 208 transitions. [2021-11-20 23:13:16,805 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 208 transitions. Word has length 64 [2021-11-20 23:13:16,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:13:16,805 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 208 transitions. [2021-11-20 23:13:16,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 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) [2021-11-20 23:13:16,806 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 208 transitions. [2021-11-20 23:13:16,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-20 23:13:16,807 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:13:16,807 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:13:16,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-20 23:13:16,808 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:13:16,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:13:16,808 INFO L85 PathProgramCache]: Analyzing trace with hash 685798357, now seen corresponding path program 1 times [2021-11-20 23:13:16,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:13:16,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212547018] [2021-11-20 23:13:16,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:13:16,809 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:13:16,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:13:16,898 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 23:13:16,898 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:13:16,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212547018] [2021-11-20 23:13:16,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212547018] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:13:16,899 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:13:16,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:13:16,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476628447] [2021-11-20 23:13:16,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:13:16,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:13:16,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:13:16,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:13:16,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:13:16,901 INFO L87 Difference]: Start difference. First operand 139 states and 208 transitions. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 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) [2021-11-20 23:13:18,916 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:13:19,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:13:19,343 INFO L93 Difference]: Finished difference Result 283 states and 427 transitions. [2021-11-20 23:13:19,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:13:19,343 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 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 65 [2021-11-20 23:13:19,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:13:19,345 INFO L225 Difference]: With dead ends: 283 [2021-11-20 23:13:19,345 INFO L226 Difference]: Without dead ends: 156 [2021-11-20 23:13:19,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-20 23:13:19,346 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 124 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 32 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 23:13:19,346 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 240 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 280 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-20 23:13:19,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-11-20 23:13:19,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 155. [2021-11-20 23:13:19,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.4805194805194806) internal successors, (228), 154 states have internal predecessors, (228), 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) [2021-11-20 23:13:19,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 228 transitions. [2021-11-20 23:13:19,353 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 228 transitions. Word has length 65 [2021-11-20 23:13:19,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:13:19,354 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 228 transitions. [2021-11-20 23:13:19,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 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) [2021-11-20 23:13:19,354 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 228 transitions. [2021-11-20 23:13:19,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-20 23:13:19,355 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:13:19,355 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:13:19,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-20 23:13:19,356 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:13:19,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:13:19,356 INFO L85 PathProgramCache]: Analyzing trace with hash 199085114, now seen corresponding path program 1 times [2021-11-20 23:13:19,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:13:19,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151472113] [2021-11-20 23:13:19,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:13:19,357 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:13:19,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:13:19,419 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:13:19,419 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:13:19,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151472113] [2021-11-20 23:13:19,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151472113] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:13:19,420 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:13:19,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 23:13:19,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729113] [2021-11-20 23:13:19,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:13:19,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:13:19,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:13:19,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:13:19,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:13:19,422 INFO L87 Difference]: Start difference. First operand 155 states and 228 transitions. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 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) [2021-11-20 23:13:21,433 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:13:21,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:13:21,805 INFO L93 Difference]: Finished difference Result 312 states and 459 transitions. [2021-11-20 23:13:21,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:13:21,807 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 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 66 [2021-11-20 23:13:21,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:13:21,809 INFO L225 Difference]: With dead ends: 312 [2021-11-20 23:13:21,809 INFO L226 Difference]: Without dead ends: 169 [2021-11-20 23:13:21,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:13:21,810 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 30 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 23:13:21,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 339 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 175 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-20 23:13:21,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-11-20 23:13:21,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 155. [2021-11-20 23:13:21,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.474025974025974) internal successors, (227), 154 states have internal predecessors, (227), 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) [2021-11-20 23:13:21,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 227 transitions. [2021-11-20 23:13:21,817 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 227 transitions. Word has length 66 [2021-11-20 23:13:21,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:13:21,817 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 227 transitions. [2021-11-20 23:13:21,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 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) [2021-11-20 23:13:21,818 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 227 transitions. [2021-11-20 23:13:21,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-20 23:13:21,819 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:13:21,819 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:13:21,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-20 23:13:21,820 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:13:21,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:13:21,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1000438870, now seen corresponding path program 1 times [2021-11-20 23:13:21,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:13:21,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162893216] [2021-11-20 23:13:21,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:13:21,821 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:13:21,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:13:21,885 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:13:21,886 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:13:21,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162893216] [2021-11-20 23:13:21,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162893216] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:13:21,886 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:13:21,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 23:13:21,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183131103] [2021-11-20 23:13:21,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:13:21,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:13:21,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:13:21,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:13:21,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:13:21,888 INFO L87 Difference]: Start difference. First operand 155 states and 227 transitions. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 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) [2021-11-20 23:13:23,898 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:13:24,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:13:24,229 INFO L93 Difference]: Finished difference Result 312 states and 457 transitions. [2021-11-20 23:13:24,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:13:24,231 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 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 66 [2021-11-20 23:13:24,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:13:24,232 INFO L225 Difference]: With dead ends: 312 [2021-11-20 23:13:24,232 INFO L226 Difference]: Without dead ends: 169 [2021-11-20 23:13:24,233 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:13:24,234 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 25 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 23:13:24,234 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 339 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 175 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 23:13:24,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-11-20 23:13:24,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 155. [2021-11-20 23:13:24,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.4675324675324675) internal successors, (226), 154 states have internal predecessors, (226), 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) [2021-11-20 23:13:24,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 226 transitions. [2021-11-20 23:13:24,243 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 226 transitions. Word has length 66 [2021-11-20 23:13:24,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:13:24,243 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 226 transitions. [2021-11-20 23:13:24,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 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) [2021-11-20 23:13:24,243 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 226 transitions. [2021-11-20 23:13:24,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-20 23:13:24,244 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:13:24,245 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:13:24,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-20 23:13:24,245 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:13:24,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:13:24,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1654022813, now seen corresponding path program 1 times [2021-11-20 23:13:24,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:13:24,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899094146] [2021-11-20 23:13:24,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:13:24,246 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:13:24,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:13:24,316 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:13:24,316 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:13:24,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899094146] [2021-11-20 23:13:24,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899094146] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:13:24,317 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:13:24,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 23:13:24,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011697540] [2021-11-20 23:13:24,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:13:24,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:13:24,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:13:24,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:13:24,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:13:24,319 INFO L87 Difference]: Start difference. First operand 155 states and 226 transitions. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 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) [2021-11-20 23:13:26,330 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:13:26,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:13:26,615 INFO L93 Difference]: Finished difference Result 312 states and 455 transitions. [2021-11-20 23:13:26,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:13:26,616 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 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 66 [2021-11-20 23:13:26,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:13:26,617 INFO L225 Difference]: With dead ends: 312 [2021-11-20 23:13:26,617 INFO L226 Difference]: Without dead ends: 169 [2021-11-20 23:13:26,618 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:13:26,619 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 23 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 23:13:26,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 340 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 174 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 23:13:26,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-11-20 23:13:26,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 155. [2021-11-20 23:13:26,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.4610389610389611) internal successors, (225), 154 states have internal predecessors, (225), 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) [2021-11-20 23:13:26,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 225 transitions. [2021-11-20 23:13:26,626 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 225 transitions. Word has length 66 [2021-11-20 23:13:26,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:13:26,626 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 225 transitions. [2021-11-20 23:13:26,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 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) [2021-11-20 23:13:26,626 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 225 transitions. [2021-11-20 23:13:26,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-20 23:13:26,627 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:13:26,627 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:13:26,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-20 23:13:26,627 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:13:26,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:13:26,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1890305538, now seen corresponding path program 1 times [2021-11-20 23:13:26,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:13:26,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780935904] [2021-11-20 23:13:26,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:13:26,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:13:26,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:13:26,688 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:13:26,688 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:13:26,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780935904] [2021-11-20 23:13:26,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780935904] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:13:26,688 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:13:26,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 23:13:26,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684567944] [2021-11-20 23:13:26,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:13:26,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:13:26,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:13:26,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:13:26,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:13:26,690 INFO L87 Difference]: Start difference. First operand 155 states and 225 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 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) [2021-11-20 23:13:28,701 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:13:29,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:13:29,011 INFO L93 Difference]: Finished difference Result 312 states and 453 transitions. [2021-11-20 23:13:29,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:13:29,012 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 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 67 [2021-11-20 23:13:29,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:13:29,015 INFO L225 Difference]: With dead ends: 312 [2021-11-20 23:13:29,015 INFO L226 Difference]: Without dead ends: 169 [2021-11-20 23:13:29,016 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:13:29,016 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 27 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 23:13:29,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 339 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 175 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 23:13:29,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-11-20 23:13:29,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 155. [2021-11-20 23:13:29,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.4545454545454546) internal successors, (224), 154 states have internal predecessors, (224), 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) [2021-11-20 23:13:29,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 224 transitions. [2021-11-20 23:13:29,024 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 224 transitions. Word has length 67 [2021-11-20 23:13:29,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:13:29,025 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 224 transitions. [2021-11-20 23:13:29,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 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) [2021-11-20 23:13:29,025 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 224 transitions. [2021-11-20 23:13:29,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-20 23:13:29,026 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:13:29,026 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:13:29,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-20 23:13:29,027 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:13:29,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:13:29,027 INFO L85 PathProgramCache]: Analyzing trace with hash -1915863202, now seen corresponding path program 1 times [2021-11-20 23:13:29,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:13:29,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255071611] [2021-11-20 23:13:29,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:13:29,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:13:29,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:13:29,119 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:13:29,120 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:13:29,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255071611] [2021-11-20 23:13:29,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255071611] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:13:29,120 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:13:29,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 23:13:29,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126405918] [2021-11-20 23:13:29,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:13:29,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:13:29,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:13:29,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:13:29,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:13:29,122 INFO L87 Difference]: Start difference. First operand 155 states and 224 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 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) [2021-11-20 23:13:31,136 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:13:31,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:13:31,405 INFO L93 Difference]: Finished difference Result 310 states and 449 transitions. [2021-11-20 23:13:31,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:13:31,406 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 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 67 [2021-11-20 23:13:31,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:13:31,408 INFO L225 Difference]: With dead ends: 310 [2021-11-20 23:13:31,408 INFO L226 Difference]: Without dead ends: 167 [2021-11-20 23:13:31,408 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:13:31,409 INFO L933 BasicCegarLoop]: 135 mSDtfsCounter, 22 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 23:13:31,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 343 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 171 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 23:13:31,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-11-20 23:13:31,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 155. [2021-11-20 23:13:31,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.448051948051948) internal successors, (223), 154 states have internal predecessors, (223), 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) [2021-11-20 23:13:31,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 223 transitions. [2021-11-20 23:13:31,416 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 223 transitions. Word has length 67 [2021-11-20 23:13:31,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:13:31,417 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 223 transitions. [2021-11-20 23:13:31,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 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) [2021-11-20 23:13:31,417 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 223 transitions. [2021-11-20 23:13:31,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-20 23:13:31,418 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:13:31,418 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:13:31,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-20 23:13:31,418 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:13:31,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:13:31,419 INFO L85 PathProgramCache]: Analyzing trace with hash -251673473, now seen corresponding path program 1 times [2021-11-20 23:13:31,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:13:31,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727369279] [2021-11-20 23:13:31,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:13:31,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:13:31,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:13:31,474 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:13:31,475 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:13:31,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727369279] [2021-11-20 23:13:31,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727369279] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:13:31,475 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:13:31,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 23:13:31,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637369376] [2021-11-20 23:13:31,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:13:31,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:13:31,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:13:31,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:13:31,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:13:31,477 INFO L87 Difference]: Start difference. First operand 155 states and 223 transitions. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 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) [2021-11-20 23:13:33,488 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:13:33,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:13:33,800 INFO L93 Difference]: Finished difference Result 310 states and 447 transitions. [2021-11-20 23:13:33,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:13:33,802 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 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 68 [2021-11-20 23:13:33,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:13:33,803 INFO L225 Difference]: With dead ends: 310 [2021-11-20 23:13:33,803 INFO L226 Difference]: Without dead ends: 167 [2021-11-20 23:13:33,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:13:33,804 INFO L933 BasicCegarLoop]: 135 mSDtfsCounter, 24 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 23:13:33,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 343 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 171 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 23:13:33,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-11-20 23:13:33,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 155. [2021-11-20 23:13:33,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.4415584415584415) internal successors, (222), 154 states have internal predecessors, (222), 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) [2021-11-20 23:13:33,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 222 transitions. [2021-11-20 23:13:33,812 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 222 transitions. Word has length 68 [2021-11-20 23:13:33,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:13:33,812 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 222 transitions. [2021-11-20 23:13:33,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 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) [2021-11-20 23:13:33,813 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 222 transitions. [2021-11-20 23:13:33,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-20 23:13:33,814 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:13:33,814 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:13:33,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-20 23:13:33,815 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:13:33,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:13:33,815 INFO L85 PathProgramCache]: Analyzing trace with hash -963750681, now seen corresponding path program 1 times [2021-11-20 23:13:33,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:13:33,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893746347] [2021-11-20 23:13:33,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:13:33,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:13:33,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:13:33,870 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:13:33,870 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:13:33,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893746347] [2021-11-20 23:13:33,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893746347] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:13:33,870 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:13:33,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 23:13:33,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057906472] [2021-11-20 23:13:33,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:13:33,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:13:33,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:13:33,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:13:33,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:13:33,872 INFO L87 Difference]: Start difference. First operand 155 states and 222 transitions. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 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) [2021-11-20 23:13:35,883 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:13:36,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:13:36,115 INFO L93 Difference]: Finished difference Result 302 states and 436 transitions. [2021-11-20 23:13:36,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:13:36,117 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 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 [2021-11-20 23:13:36,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:13:36,118 INFO L225 Difference]: With dead ends: 302 [2021-11-20 23:13:36,118 INFO L226 Difference]: Without dead ends: 159 [2021-11-20 23:13:36,118 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:13:36,119 INFO L933 BasicCegarLoop]: 139 mSDtfsCounter, 18 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:13:36,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 351 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 163 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-11-20 23:13:36,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-11-20 23:13:36,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 155. [2021-11-20 23:13:36,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.4350649350649352) internal successors, (221), 154 states have internal predecessors, (221), 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) [2021-11-20 23:13:36,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 221 transitions. [2021-11-20 23:13:36,125 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 221 transitions. Word has length 69 [2021-11-20 23:13:36,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:13:36,125 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 221 transitions. [2021-11-20 23:13:36,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 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) [2021-11-20 23:13:36,126 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 221 transitions. [2021-11-20 23:13:36,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-20 23:13:36,126 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:13:36,127 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:13:36,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-20 23:13:36,127 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:13:36,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:13:36,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1155512593, now seen corresponding path program 1 times [2021-11-20 23:13:36,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:13:36,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858181821] [2021-11-20 23:13:36,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:13:36,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:13:36,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:13:36,229 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:13:36,229 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:13:36,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858181821] [2021-11-20 23:13:36,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858181821] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:13:36,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532262317] [2021-11-20 23:13:36,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:13:36,230 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:13:36,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:13:36,241 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:13:36,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 23:13:36,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:13:36,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 23:13:36,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:13:36,736 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:13:36,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:13:36,968 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-20 23:13:36,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532262317] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 23:13:36,969 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-20 23:13:36,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4, 4] total 5 [2021-11-20 23:13:36,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49819996] [2021-11-20 23:13:36,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:13:36,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:13:36,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:13:36,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:13:36,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:13:36,971 INFO L87 Difference]: Start difference. First operand 155 states and 221 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 2 states have internal predecessors, (48), 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) [2021-11-20 23:13:38,982 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:13:39,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:13:39,156 INFO L93 Difference]: Finished difference Result 297 states and 429 transitions. [2021-11-20 23:13:39,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:13:39,157 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 2 states have internal predecessors, (48), 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 72 [2021-11-20 23:13:39,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:13:39,159 INFO L225 Difference]: With dead ends: 297 [2021-11-20 23:13:39,159 INFO L226 Difference]: Without dead ends: 295 [2021-11-20 23:13:39,159 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:13:39,160 INFO L933 BasicCegarLoop]: 134 mSDtfsCounter, 103 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 16 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:13:39,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 266 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 57 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-11-20 23:13:39,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2021-11-20 23:13:39,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 292. [2021-11-20 23:13:39,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 1.4536082474226804) internal successors, (423), 291 states have internal predecessors, (423), 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) [2021-11-20 23:13:39,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 423 transitions. [2021-11-20 23:13:39,173 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 423 transitions. Word has length 72 [2021-11-20 23:13:39,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:13:39,174 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 423 transitions. [2021-11-20 23:13:39,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 2 states have internal predecessors, (48), 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) [2021-11-20 23:13:39,174 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 423 transitions. [2021-11-20 23:13:39,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-20 23:13:39,176 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:13:39,176 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:13:39,242 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 23:13:39,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:13:39,391 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:13:39,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:13:39,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1685993115, now seen corresponding path program 1 times [2021-11-20 23:13:39,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:13:39,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556845812] [2021-11-20 23:13:39,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:13:39,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:13:39,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:13:39,565 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 23:13:39,565 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:13:39,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556845812] [2021-11-20 23:13:39,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556845812] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:13:39,566 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:13:39,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 23:13:39,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959456099] [2021-11-20 23:13:39,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:13:39,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 23:13:39,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:13:39,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 23:13:39,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:13:39,570 INFO L87 Difference]: Start difference. First operand 292 states and 423 transitions. Second operand has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 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) [2021-11-20 23:13:41,580 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:13:42,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:13:42,367 INFO L93 Difference]: Finished difference Result 756 states and 1112 transitions. [2021-11-20 23:13:42,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:13:42,369 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 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 111 [2021-11-20 23:13:42,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:13:42,373 INFO L225 Difference]: With dead ends: 756 [2021-11-20 23:13:42,373 INFO L226 Difference]: Without dead ends: 476 [2021-11-20 23:13:42,374 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:13:42,374 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 106 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 486 mSolverCounterSat, 13 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 486 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-20 23:13:42,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 471 Invalid, 500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 486 Invalid, 1 Unknown, 0 Unchecked, 2.7s Time] [2021-11-20 23:13:42,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-11-20 23:13:42,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 370. [2021-11-20 23:13:42,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 369 states have (on average 1.5311653116531165) internal successors, (565), 369 states have internal predecessors, (565), 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) [2021-11-20 23:13:42,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 565 transitions. [2021-11-20 23:13:42,393 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 565 transitions. Word has length 111 [2021-11-20 23:13:42,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:13:42,394 INFO L470 AbstractCegarLoop]: Abstraction has 370 states and 565 transitions. [2021-11-20 23:13:42,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 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) [2021-11-20 23:13:42,395 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 565 transitions. [2021-11-20 23:13:42,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-20 23:13:42,397 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:13:42,397 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:13:42,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-20 23:13:42,397 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:13:42,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:13:42,398 INFO L85 PathProgramCache]: Analyzing trace with hash -813310218, now seen corresponding path program 1 times [2021-11-20 23:13:42,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:13:42,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363111131] [2021-11-20 23:13:42,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:13:42,401 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:13:42,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:13:42,555 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 97 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-20 23:13:42,555 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:13:42,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363111131] [2021-11-20 23:13:42,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363111131] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:13:42,556 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:13:42,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:13:42,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451865031] [2021-11-20 23:13:42,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:13:42,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:13:42,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:13:42,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:13:42,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:13:42,558 INFO L87 Difference]: Start difference. First operand 370 states and 565 transitions. Second operand has 5 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 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) [2021-11-20 23:13:44,569 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:13:45,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:13:45,123 INFO L93 Difference]: Finished difference Result 930 states and 1427 transitions. [2021-11-20 23:13:45,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:13:45,125 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 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 123 [2021-11-20 23:13:45,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:13:45,129 INFO L225 Difference]: With dead ends: 930 [2021-11-20 23:13:45,129 INFO L226 Difference]: Without dead ends: 572 [2021-11-20 23:13:45,130 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:13:45,131 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 125 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 48 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-20 23:13:45,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 326 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 316 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2021-11-20 23:13:45,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2021-11-20 23:13:45,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 451. [2021-11-20 23:13:45,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 450 states have (on average 1.5866666666666667) internal successors, (714), 450 states have internal predecessors, (714), 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) [2021-11-20 23:13:45,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 714 transitions. [2021-11-20 23:13:45,153 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 714 transitions. Word has length 123 [2021-11-20 23:13:45,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:13:45,153 INFO L470 AbstractCegarLoop]: Abstraction has 451 states and 714 transitions. [2021-11-20 23:13:45,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 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) [2021-11-20 23:13:45,154 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 714 transitions. [2021-11-20 23:13:45,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-20 23:13:45,155 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:13:45,156 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:13:45,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-20 23:13:45,156 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:13:45,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:13:45,157 INFO L85 PathProgramCache]: Analyzing trace with hash 481008793, now seen corresponding path program 1 times [2021-11-20 23:13:45,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:13:45,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698199058] [2021-11-20 23:13:45,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:13:45,158 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:13:45,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:13:45,337 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 23:13:45,337 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:13:45,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698199058] [2021-11-20 23:13:45,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698199058] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:13:45,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819686855] [2021-11-20 23:13:45,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:13:45,338 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:13:45,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:13:45,339 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:13:45,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 23:13:45,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:13:45,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 23:13:45,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:13:45,692 INFO L354 Elim1Store]: treesize reduction 74, result has 46.0 percent of original size [2021-11-20 23:13:45,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 172 treesize of output 163 [2021-11-20 23:13:45,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 140 treesize of output 110 [2021-11-20 23:13:45,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 80 [2021-11-20 23:13:45,770 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 23:13:45,813 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-11-20 23:13:45,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 7 [2021-11-20 23:13:45,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-11-20 23:13:46,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 11 [2021-11-20 23:13:46,335 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 97 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-20 23:13:46,336 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 23:13:46,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819686855] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:13:46,336 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 23:13:46,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2021-11-20 23:13:46,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41127233] [2021-11-20 23:13:46,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:13:46,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:13:46,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:13:46,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:13:46,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-20 23:13:46,338 INFO L87 Difference]: Start difference. First operand 451 states and 714 transitions. Second operand has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 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) [2021-11-20 23:13:48,349 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:13:48,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:13:48,886 INFO L93 Difference]: Finished difference Result 1070 states and 1690 transitions. [2021-11-20 23:13:48,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:13:48,888 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 124 [2021-11-20 23:13:48,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:13:48,893 INFO L225 Difference]: With dead ends: 1070 [2021-11-20 23:13:48,893 INFO L226 Difference]: Without dead ends: 629 [2021-11-20 23:13:48,894 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-20 23:13:48,895 INFO L933 BasicCegarLoop]: 201 mSDtfsCounter, 74 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-20 23:13:48,895 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 477 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 300 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2021-11-20 23:13:48,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2021-11-20 23:13:48,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 531. [2021-11-20 23:13:48,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 530 states have (on average 1.6226415094339623) internal successors, (860), 530 states have internal predecessors, (860), 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) [2021-11-20 23:13:48,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 860 transitions. [2021-11-20 23:13:48,919 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 860 transitions. Word has length 124 [2021-11-20 23:13:48,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:13:48,919 INFO L470 AbstractCegarLoop]: Abstraction has 531 states and 860 transitions. [2021-11-20 23:13:48,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 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) [2021-11-20 23:13:48,920 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 860 transitions. [2021-11-20 23:13:48,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-20 23:13:48,922 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:13:48,922 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:13:48,957 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 23:13:49,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-20 23:13:49,139 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:13:49,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:13:49,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1937506123, now seen corresponding path program 1 times [2021-11-20 23:13:49,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:13:49,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829496830] [2021-11-20 23:13:49,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:13:49,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:13:49,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:13:49,219 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 98 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-20 23:13:49,219 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:13:49,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829496830] [2021-11-20 23:13:49,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829496830] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:13:49,220 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:13:49,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 23:13:49,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629644603] [2021-11-20 23:13:49,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:13:49,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:13:49,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:13:49,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:13:49,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:13:49,222 INFO L87 Difference]: Start difference. First operand 531 states and 860 transitions. Second operand has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:13:51,233 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:13:51,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:13:51,753 INFO L93 Difference]: Finished difference Result 1174 states and 1896 transitions. [2021-11-20 23:13:51,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:13:51,755 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 124 [2021-11-20 23:13:51,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:13:51,760 INFO L225 Difference]: With dead ends: 1174 [2021-11-20 23:13:51,760 INFO L226 Difference]: Without dead ends: 655 [2021-11-20 23:13:51,761 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:13:51,761 INFO L933 BasicCegarLoop]: 181 mSDtfsCounter, 46 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 11 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-20 23:13:51,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 435 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 251 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2021-11-20 23:13:51,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2021-11-20 23:13:51,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 591. [2021-11-20 23:13:51,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 590 states have (on average 1.6372881355932203) internal successors, (966), 590 states have internal predecessors, (966), 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) [2021-11-20 23:13:51,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 966 transitions. [2021-11-20 23:13:51,785 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 966 transitions. Word has length 124 [2021-11-20 23:13:51,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:13:51,785 INFO L470 AbstractCegarLoop]: Abstraction has 591 states and 966 transitions. [2021-11-20 23:13:51,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:13:51,786 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 966 transitions. [2021-11-20 23:13:51,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-20 23:13:51,788 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:13:51,788 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:13:51,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-20 23:13:51,788 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:13:51,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:13:51,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1341739202, now seen corresponding path program 1 times [2021-11-20 23:13:51,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:13:51,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871937400] [2021-11-20 23:13:51,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:13:51,790 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:13:51,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:13:51,871 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 109 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-20 23:13:51,872 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:13:51,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871937400] [2021-11-20 23:13:51,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871937400] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:13:51,872 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:13:51,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 23:13:51,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138228108] [2021-11-20 23:13:51,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:13:51,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:13:51,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:13:51,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:13:51,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:13:51,874 INFO L87 Difference]: Start difference. First operand 591 states and 966 transitions. Second operand has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 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) [2021-11-20 23:13:53,885 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:13:54,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:13:54,486 INFO L93 Difference]: Finished difference Result 1350 states and 2194 transitions. [2021-11-20 23:13:54,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:13:54,488 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 124 [2021-11-20 23:13:54,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:13:54,493 INFO L225 Difference]: With dead ends: 1350 [2021-11-20 23:13:54,493 INFO L226 Difference]: Without dead ends: 769 [2021-11-20 23:13:54,494 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:13:54,494 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 74 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-11-20 23:13:54,495 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 481 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 300 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2021-11-20 23:13:54,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 769 states. [2021-11-20 23:13:54,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 769 to 591. [2021-11-20 23:13:54,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 590 states have (on average 1.6372881355932203) internal successors, (966), 590 states have internal predecessors, (966), 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) [2021-11-20 23:13:54,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 966 transitions. [2021-11-20 23:13:54,525 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 966 transitions. Word has length 124 [2021-11-20 23:13:54,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:13:54,526 INFO L470 AbstractCegarLoop]: Abstraction has 591 states and 966 transitions. [2021-11-20 23:13:54,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 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) [2021-11-20 23:13:54,527 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 966 transitions. [2021-11-20 23:13:54,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-20 23:13:54,529 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:13:54,529 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:13:54,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-20 23:13:54,530 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:13:54,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:13:54,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1244371000, now seen corresponding path program 1 times [2021-11-20 23:13:54,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:13:54,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963591180] [2021-11-20 23:13:54,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:13:54,532 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:13:54,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:13:54,661 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-20 23:13:54,662 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:13:54,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963591180] [2021-11-20 23:13:54,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963591180] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:13:54,662 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:13:54,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 23:13:54,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756906819] [2021-11-20 23:13:54,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:13:54,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:13:54,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:13:54,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:13:54,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:13:54,665 INFO L87 Difference]: Start difference. First operand 591 states and 966 transitions. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 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) [2021-11-20 23:13:56,676 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:13:57,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:13:57,047 INFO L93 Difference]: Finished difference Result 1256 states and 2046 transitions. [2021-11-20 23:13:57,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:13:57,050 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 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 133 [2021-11-20 23:13:57,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:13:57,054 INFO L225 Difference]: With dead ends: 1256 [2021-11-20 23:13:57,054 INFO L226 Difference]: Without dead ends: 677 [2021-11-20 23:13:57,056 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:13:57,056 INFO L933 BasicCegarLoop]: 169 mSDtfsCounter, 29 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 23:13:57,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 411 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 209 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-20 23:13:57,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2021-11-20 23:13:57,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 639. [2021-11-20 23:13:57,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639 states, 638 states have (on average 1.6426332288401253) internal successors, (1048), 638 states have internal predecessors, (1048), 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) [2021-11-20 23:13:57,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 1048 transitions. [2021-11-20 23:13:57,082 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 1048 transitions. Word has length 133 [2021-11-20 23:13:57,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:13:57,082 INFO L470 AbstractCegarLoop]: Abstraction has 639 states and 1048 transitions. [2021-11-20 23:13:57,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 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) [2021-11-20 23:13:57,083 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 1048 transitions. [2021-11-20 23:13:57,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-20 23:13:57,085 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:13:57,085 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:13:57,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-20 23:13:57,086 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:13:57,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:13:57,086 INFO L85 PathProgramCache]: Analyzing trace with hash -281710856, now seen corresponding path program 1 times [2021-11-20 23:13:57,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:13:57,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132634409] [2021-11-20 23:13:57,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:13:57,087 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:13:57,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:13:57,177 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 120 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-20 23:13:57,177 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:13:57,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132634409] [2021-11-20 23:13:57,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132634409] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:13:57,178 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:13:57,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 23:13:57,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399934171] [2021-11-20 23:13:57,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:13:57,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:13:57,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:13:57,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:13:57,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:13:57,180 INFO L87 Difference]: Start difference. First operand 639 states and 1048 transitions. Second operand has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 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) [2021-11-20 23:13:59,192 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:13:59,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:13:59,672 INFO L93 Difference]: Finished difference Result 1380 states and 2256 transitions. [2021-11-20 23:13:59,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:13:59,674 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 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 136 [2021-11-20 23:13:59,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:13:59,679 INFO L225 Difference]: With dead ends: 1380 [2021-11-20 23:13:59,679 INFO L226 Difference]: Without dead ends: 753 [2021-11-20 23:13:59,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:13:59,681 INFO L933 BasicCegarLoop]: 178 mSDtfsCounter, 43 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 10 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-20 23:13:59,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 429 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 238 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2021-11-20 23:13:59,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2021-11-20 23:13:59,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 695. [2021-11-20 23:13:59,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 695 states, 694 states have (on average 1.6512968299711817) internal successors, (1146), 694 states have internal predecessors, (1146), 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) [2021-11-20 23:13:59,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 1146 transitions. [2021-11-20 23:13:59,722 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 1146 transitions. Word has length 136 [2021-11-20 23:13:59,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:13:59,722 INFO L470 AbstractCegarLoop]: Abstraction has 695 states and 1146 transitions. [2021-11-20 23:13:59,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 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) [2021-11-20 23:13:59,722 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 1146 transitions. [2021-11-20 23:13:59,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-20 23:13:59,725 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:13:59,725 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:13:59,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-20 23:13:59,726 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:13:59,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:13:59,726 INFO L85 PathProgramCache]: Analyzing trace with hash 789919822, now seen corresponding path program 1 times [2021-11-20 23:13:59,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:13:59,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284589303] [2021-11-20 23:13:59,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:13:59,727 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:13:59,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:13:59,808 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 114 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-20 23:13:59,808 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:13:59,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284589303] [2021-11-20 23:13:59,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284589303] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:13:59,809 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:13:59,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 23:13:59,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439114055] [2021-11-20 23:13:59,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:13:59,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:13:59,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:13:59,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:13:59,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:13:59,811 INFO L87 Difference]: Start difference. First operand 695 states and 1146 transitions. Second operand has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 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) [2021-11-20 23:14:01,821 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:14:02,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:14:02,253 INFO L93 Difference]: Finished difference Result 1484 states and 2440 transitions. [2021-11-20 23:14:02,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:14:02,255 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 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 137 [2021-11-20 23:14:02,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:14:02,260 INFO L225 Difference]: With dead ends: 1484 [2021-11-20 23:14:02,260 INFO L226 Difference]: Without dead ends: 801 [2021-11-20 23:14:02,262 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:14:02,262 INFO L933 BasicCegarLoop]: 175 mSDtfsCounter, 40 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 23:14:02,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 423 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 236 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-20 23:14:02,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 801 states. [2021-11-20 23:14:02,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 801 to 747. [2021-11-20 23:14:02,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 747 states, 746 states have (on average 1.6568364611260054) internal successors, (1236), 746 states have internal predecessors, (1236), 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) [2021-11-20 23:14:02,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 747 states to 747 states and 1236 transitions. [2021-11-20 23:14:02,291 INFO L78 Accepts]: Start accepts. Automaton has 747 states and 1236 transitions. Word has length 137 [2021-11-20 23:14:02,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:14:02,291 INFO L470 AbstractCegarLoop]: Abstraction has 747 states and 1236 transitions. [2021-11-20 23:14:02,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 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) [2021-11-20 23:14:02,291 INFO L276 IsEmpty]: Start isEmpty. Operand 747 states and 1236 transitions. [2021-11-20 23:14:02,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-20 23:14:02,294 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:14:02,294 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:14:02,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-11-20 23:14:02,295 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:14:02,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:14:02,295 INFO L85 PathProgramCache]: Analyzing trace with hash 1380548469, now seen corresponding path program 1 times [2021-11-20 23:14:02,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:14:02,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727895883] [2021-11-20 23:14:02,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:14:02,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:14:02,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:14:02,439 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 130 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-20 23:14:02,440 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:14:02,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727895883] [2021-11-20 23:14:02,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727895883] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:14:02,440 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:14:02,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 23:14:02,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175821726] [2021-11-20 23:14:02,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:14:02,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 23:14:02,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:14:02,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 23:14:02,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:14:02,444 INFO L87 Difference]: Start difference. First operand 747 states and 1236 transitions. Second operand has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 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) [2021-11-20 23:14:04,453 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:14:05,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:14:05,011 INFO L93 Difference]: Finished difference Result 1582 states and 2586 transitions. [2021-11-20 23:14:05,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:14:05,013 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 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 139 [2021-11-20 23:14:05,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:14:05,018 INFO L225 Difference]: With dead ends: 1582 [2021-11-20 23:14:05,018 INFO L226 Difference]: Without dead ends: 847 [2021-11-20 23:14:05,019 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:14:05,020 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 147 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 12 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-20 23:14:05,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 417 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 398 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2021-11-20 23:14:05,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2021-11-20 23:14:05,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 747. [2021-11-20 23:14:05,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 747 states, 746 states have (on average 1.6541554959785523) internal successors, (1234), 746 states have internal predecessors, (1234), 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) [2021-11-20 23:14:05,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 747 states to 747 states and 1234 transitions. [2021-11-20 23:14:05,049 INFO L78 Accepts]: Start accepts. Automaton has 747 states and 1234 transitions. Word has length 139 [2021-11-20 23:14:05,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:14:05,050 INFO L470 AbstractCegarLoop]: Abstraction has 747 states and 1234 transitions. [2021-11-20 23:14:05,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 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) [2021-11-20 23:14:05,050 INFO L276 IsEmpty]: Start isEmpty. Operand 747 states and 1234 transitions. [2021-11-20 23:14:05,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-20 23:14:05,053 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:14:05,053 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:14:05,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-11-20 23:14:05,054 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:14:05,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:14:05,054 INFO L85 PathProgramCache]: Analyzing trace with hash -515091039, now seen corresponding path program 1 times [2021-11-20 23:14:05,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:14:05,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315953992] [2021-11-20 23:14:05,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:14:05,055 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:14:05,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:14:05,247 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:14:05,247 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:14:05,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315953992] [2021-11-20 23:14:05,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315953992] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:14:05,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468501311] [2021-11-20 23:14:05,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:14:05,248 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:14:05,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:14:05,249 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:14:05,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 23:14:05,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:14:05,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 582 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-20 23:14:05,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:14:05,850 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-11-20 23:14:05,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:14:06,652 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-20 23:14:06,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468501311] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:14:06,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [245185889] [2021-11-20 23:14:06,674 INFO L159 IcfgInterpreter]: Started Sifa with 61 locations of interest [2021-11-20 23:14:06,674 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:14:06,678 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:14:06,682 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:14:06,683 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:14:07,166 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 23:14:07,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:14:07,339 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: Some non-self update cases but no top-level DER relation at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.DerPreprocessor.(DerPreprocessor.java:146) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.ElimStorePlain.applyComplexEliminationRules(ElimStorePlain.java:340) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:140) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne(DualJunctionSaa.java:115) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryExhaustivelyToEliminate(DualJunctionSaa.java:93) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:88) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToEliminateOne(QuantifierPusher.java:903) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyNewEliminationTechniquesExhaustively(QuantifierPusher.java:865) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyDualJunctionEliminationTechniques(QuantifierPusher.java:783) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective2(QuantifierPusher.java:425) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:355) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:162) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:243) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:233) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminate(PartialQuantifierElimination.java:92) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.newQuantifier(SymbolicTools.java:278) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.projectExistentially(SymbolicTools.java:264) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateTransformer.strongestPostcondition(PredicateTransformer.java:131) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:116) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-20 23:14:07,342 INFO L158 Benchmark]: Toolchain (without parser) took 83237.10ms. Allocated memory was 109.1MB in the beginning and 163.6MB in the end (delta: 54.5MB). Free memory was 66.3MB in the beginning and 71.3MB in the end (delta: -5.0MB). Peak memory consumption was 88.9MB. Max. memory is 16.1GB. [2021-11-20 23:14:07,342 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 109.1MB. Free memory is still 85.3MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 23:14:07,342 INFO L158 Benchmark]: CACSL2BoogieTranslator took 776.33ms. Allocated memory is still 109.1MB. Free memory was 66.1MB in the beginning and 63.0MB in the end (delta: 3.0MB). Peak memory consumption was 7.0MB. Max. memory is 16.1GB. [2021-11-20 23:14:07,343 INFO L158 Benchmark]: Boogie Procedure Inliner took 110.84ms. Allocated memory is still 109.1MB. Free memory was 63.0MB in the beginning and 58.0MB in the end (delta: 5.0MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-20 23:14:07,343 INFO L158 Benchmark]: Boogie Preprocessor took 130.04ms. Allocated memory is still 109.1MB. Free memory was 58.0MB in the beginning and 51.0MB in the end (delta: 7.1MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-11-20 23:14:07,343 INFO L158 Benchmark]: RCFGBuilder took 3809.31ms. Allocated memory was 109.1MB in the beginning and 132.1MB in the end (delta: 23.1MB). Free memory was 50.7MB in the beginning and 73.3MB in the end (delta: -22.5MB). Peak memory consumption was 31.1MB. Max. memory is 16.1GB. [2021-11-20 23:14:07,343 INFO L158 Benchmark]: TraceAbstraction took 78402.24ms. Allocated memory was 132.1MB in the beginning and 163.6MB in the end (delta: 31.5MB). Free memory was 72.4MB in the beginning and 71.3MB in the end (delta: 1.1MB). Peak memory consumption was 70.8MB. Max. memory is 16.1GB. [2021-11-20 23:14:07,345 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 109.1MB. Free memory is still 85.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 776.33ms. Allocated memory is still 109.1MB. Free memory was 66.1MB in the beginning and 63.0MB in the end (delta: 3.0MB). Peak memory consumption was 7.0MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 110.84ms. Allocated memory is still 109.1MB. Free memory was 63.0MB in the beginning and 58.0MB in the end (delta: 5.0MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 130.04ms. Allocated memory is still 109.1MB. Free memory was 58.0MB in the beginning and 51.0MB in the end (delta: 7.1MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * RCFGBuilder took 3809.31ms. Allocated memory was 109.1MB in the beginning and 132.1MB in the end (delta: 23.1MB). Free memory was 50.7MB in the beginning and 73.3MB in the end (delta: -22.5MB). Peak memory consumption was 31.1MB. Max. memory is 16.1GB. * TraceAbstraction took 78402.24ms. Allocated memory was 132.1MB in the beginning and 163.6MB in the end (delta: 31.5MB). Free memory was 72.4MB in the beginning and 71.3MB in the end (delta: 1.1MB). Peak memory consumption was 70.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: Some non-self update cases but no top-level DER relation de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: Some non-self update cases but no top-level DER relation: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.DerPreprocessor.(DerPreprocessor.java:146) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-20 23:14:07,382 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.06.i.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P --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 61a0aa66b71092ec74a73b9f534556f5bbb6f25851e8b5ad307fc7dd7f051667 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 23:14:09,708 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 23:14:09,711 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 23:14:09,762 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 23:14:09,763 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 23:14:09,768 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 23:14:09,769 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 23:14:09,778 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 23:14:09,781 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 23:14:09,792 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 23:14:09,793 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 23:14:09,794 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 23:14:09,795 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 23:14:09,798 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 23:14:09,799 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 23:14:09,801 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 23:14:09,802 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 23:14:09,803 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 23:14:09,805 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 23:14:09,807 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 23:14:09,809 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 23:14:09,810 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 23:14:09,812 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 23:14:09,813 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 23:14:09,816 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 23:14:09,817 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 23:14:09,817 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 23:14:09,818 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 23:14:09,819 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 23:14:09,820 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 23:14:09,821 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 23:14:09,822 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 23:14:09,823 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 23:14:09,824 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 23:14:09,825 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 23:14:09,825 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 23:14:09,842 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 23:14:09,843 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 23:14:09,843 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 23:14:09,844 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 23:14:09,845 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 23:14:09,846 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-20 23:14:09,870 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 23:14:09,871 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 23:14:09,871 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 23:14:09,871 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 23:14:09,872 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 23:14:09,872 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 23:14:09,872 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-20 23:14:09,873 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-20 23:14:09,873 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-20 23:14:09,873 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-20 23:14:09,873 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-20 23:14:09,874 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-20 23:14:09,874 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 23:14:09,875 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 23:14:09,875 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 23:14:09,875 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 23:14:09,875 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 23:14:09,875 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 23:14:09,876 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 23:14:09,876 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-20 23:14:09,876 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-20 23:14:09,876 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 23:14:09,877 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 23:14:09,877 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 23:14:09,877 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 23:14:09,877 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 23:14:09,878 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 23:14:09,878 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 23:14:09,878 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:14:09,878 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 23:14:09,878 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 23:14:09,879 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 23:14:09,879 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-20 23:14:09,879 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-20 23:14:09,879 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 23:14:09,880 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 23:14:09,880 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 23:14:09,880 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 61a0aa66b71092ec74a73b9f534556f5bbb6f25851e8b5ad307fc7dd7f051667 [2021-11-20 23:14:10,261 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 23:14:10,295 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 23:14:10,298 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 23:14:10,299 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 23:14:10,300 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 23:14:10,301 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/openssl/s3_srvr.blast.06.i.cil-2.c [2021-11-20 23:14:10,377 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/data/3b15fb46a/87d75e1fa67f489ab636fff6bf779285/FLAG150b56499 [2021-11-20 23:14:11,012 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 23:14:11,012 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/sv-benchmarks/c/openssl/s3_srvr.blast.06.i.cil-2.c [2021-11-20 23:14:11,036 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/data/3b15fb46a/87d75e1fa67f489ab636fff6bf779285/FLAG150b56499 [2021-11-20 23:14:11,305 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/data/3b15fb46a/87d75e1fa67f489ab636fff6bf779285 [2021-11-20 23:14:11,308 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 23:14:11,313 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 23:14:11,314 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 23:14:11,315 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 23:14:11,329 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 23:14:11,329 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:14:11" (1/1) ... [2021-11-20 23:14:11,330 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56ec722a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:14:11, skipping insertion in model container [2021-11-20 23:14:11,331 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:14:11" (1/1) ... [2021-11-20 23:14:11,338 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 23:14:11,400 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 23:14:11,818 WARN L230 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_6fabedbc-0513-4804-bc37-4a4ef542450f/sv-benchmarks/c/openssl/s3_srvr.blast.06.i.cil-2.c[78808,78821] [2021-11-20 23:14:11,830 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:14:11,850 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 23:14:12,037 WARN L230 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_6fabedbc-0513-4804-bc37-4a4ef542450f/sv-benchmarks/c/openssl/s3_srvr.blast.06.i.cil-2.c[78808,78821] [2021-11-20 23:14:12,041 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:14:12,059 INFO L208 MainTranslator]: Completed translation [2021-11-20 23:14:12,060 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:14:12 WrapperNode [2021-11-20 23:14:12,060 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 23:14:12,061 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 23:14:12,062 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 23:14:12,062 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 23:14:12,069 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:14:12" (1/1) ... [2021-11-20 23:14:12,096 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:14:12" (1/1) ... [2021-11-20 23:14:12,146 INFO L137 Inliner]: procedures = 35, calls = 223, calls flagged for inlining = 7, calls inlined = 3, statements flattened = 786 [2021-11-20 23:14:12,147 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 23:14:12,148 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 23:14:12,148 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 23:14:12,148 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 23:14:12,157 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:14:12" (1/1) ... [2021-11-20 23:14:12,170 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:14:12" (1/1) ... [2021-11-20 23:14:12,180 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:14:12" (1/1) ... [2021-11-20 23:14:12,180 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:14:12" (1/1) ... [2021-11-20 23:14:12,239 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:14:12" (1/1) ... [2021-11-20 23:14:12,250 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:14:12" (1/1) ... [2021-11-20 23:14:12,253 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:14:12" (1/1) ... [2021-11-20 23:14:12,273 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 23:14:12,274 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 23:14:12,274 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 23:14:12,274 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 23:14:12,275 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:14:12" (1/1) ... [2021-11-20 23:14:12,286 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:14:12,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:14:12,315 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 23:14:12,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 23:14:12,365 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 23:14:12,366 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-20 23:14:12,366 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-20 23:14:12,367 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-20 23:14:12,368 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-20 23:14:12,368 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 23:14:12,369 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 23:14:12,369 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 23:14:12,369 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-20 23:14:12,629 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 23:14:12,630 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 23:14:12,650 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-20 23:14:16,894 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2021-11-20 23:14:16,894 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2021-11-20 23:14:16,894 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 23:14:16,910 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 23:14:16,910 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-20 23:14:16,912 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:14:16 BoogieIcfgContainer [2021-11-20 23:14:16,913 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 23:14:16,916 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 23:14:16,916 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 23:14:16,919 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 23:14:16,919 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:14:11" (1/3) ... [2021-11-20 23:14:16,920 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f984180 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:14:16, skipping insertion in model container [2021-11-20 23:14:16,920 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:14:12" (2/3) ... [2021-11-20 23:14:16,921 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f984180 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:14:16, skipping insertion in model container [2021-11-20 23:14:16,921 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:14:16" (3/3) ... [2021-11-20 23:14:16,922 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.06.i.cil-2.c [2021-11-20 23:14:16,935 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 23:14:16,936 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 23:14:17,008 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 23:14:17,030 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 [2021-11-20 23:14:17,038 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 23:14:17,062 INFO L276 IsEmpty]: Start isEmpty. Operand has 162 states, 160 states have (on average 1.7375) internal successors, (278), 161 states have internal predecessors, (278), 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) [2021-11-20 23:14:17,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-20 23:14:17,079 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:14:17,079 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:14:17,080 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:14:17,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:14:17,087 INFO L85 PathProgramCache]: Analyzing trace with hash 271453869, now seen corresponding path program 1 times [2021-11-20 23:14:17,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:14:17,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2054936857] [2021-11-20 23:14:17,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:14:17,108 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:14:17,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:14:17,114 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:14:17,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-20 23:14:17,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:14:17,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 23:14:17,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:14:17,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:14:17,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:14:18,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:14:18,127 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:14:18,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2054936857] [2021-11-20 23:14:18,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2054936857] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:14:18,130 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:14:18,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-20 23:14:18,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998953046] [2021-11-20 23:14:18,133 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:14:18,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:14:18,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:14:18,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:14:18,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:14:18,177 INFO L87 Difference]: Start difference. First operand has 162 states, 160 states have (on average 1.7375) internal successors, (278), 161 states have internal predecessors, (278), 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 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 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) [2021-11-20 23:14:18,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:14:18,713 INFO L93 Difference]: Finished difference Result 610 states and 1056 transitions. [2021-11-20 23:14:18,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:14:18,716 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 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 47 [2021-11-20 23:14:18,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:14:18,735 INFO L225 Difference]: With dead ends: 610 [2021-11-20 23:14:18,736 INFO L226 Difference]: Without dead ends: 419 [2021-11-20 23:14:18,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:14:18,751 INFO L933 BasicCegarLoop]: 232 mSDtfsCounter, 404 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 404 SdHoareTripleChecker+Valid, 667 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 23:14:18,752 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [404 Valid, 667 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 23:14:18,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2021-11-20 23:14:18,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 419. [2021-11-20 23:14:18,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 418 states have (on average 1.5406698564593302) internal successors, (644), 418 states have internal predecessors, (644), 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) [2021-11-20 23:14:18,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 644 transitions. [2021-11-20 23:14:18,837 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 644 transitions. Word has length 47 [2021-11-20 23:14:18,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:14:18,838 INFO L470 AbstractCegarLoop]: Abstraction has 419 states and 644 transitions. [2021-11-20 23:14:18,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 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) [2021-11-20 23:14:18,839 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 644 transitions. [2021-11-20 23:14:18,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-20 23:14:18,847 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:14:18,847 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:14:18,868 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-20 23:14:19,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:14:19,062 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:14:19,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:14:19,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1390827129, now seen corresponding path program 1 times [2021-11-20 23:14:19,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:14:19,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [437159386] [2021-11-20 23:14:19,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:14:19,066 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:14:19,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:14:19,067 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:14:19,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-20 23:14:19,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:14:19,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 23:14:19,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:14:19,743 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:14:19,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:14:20,213 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:14:20,213 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:14:20,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [437159386] [2021-11-20 23:14:20,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [437159386] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:14:20,213 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:14:20,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-20 23:14:20,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048882902] [2021-11-20 23:14:20,214 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:14:20,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:14:20,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:14:20,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:14:20,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:14:20,217 INFO L87 Difference]: Start difference. First operand 419 states and 644 transitions. Second operand has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 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) [2021-11-20 23:14:20,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:14:20,697 INFO L93 Difference]: Finished difference Result 960 states and 1506 transitions. [2021-11-20 23:14:20,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:14:20,699 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 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 110 [2021-11-20 23:14:20,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:14:20,704 INFO L225 Difference]: With dead ends: 960 [2021-11-20 23:14:20,705 INFO L226 Difference]: Without dead ends: 687 [2021-11-20 23:14:20,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:14:20,708 INFO L933 BasicCegarLoop]: 361 mSDtfsCounter, 315 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 721 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 23:14:20,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [315 Valid, 721 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 23:14:20,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2021-11-20 23:14:20,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 687. [2021-11-20 23:14:20,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 687 states, 686 states have (on average 1.5291545189504374) internal successors, (1049), 686 states have internal predecessors, (1049), 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) [2021-11-20 23:14:20,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 1049 transitions. [2021-11-20 23:14:20,796 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 1049 transitions. Word has length 110 [2021-11-20 23:14:20,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:14:20,797 INFO L470 AbstractCegarLoop]: Abstraction has 687 states and 1049 transitions. [2021-11-20 23:14:20,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 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) [2021-11-20 23:14:20,797 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 1049 transitions. [2021-11-20 23:14:20,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-11-20 23:14:20,817 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:14:20,817 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:14:20,835 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-20 23:14:21,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:14:21,022 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:14:21,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:14:21,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1114584605, now seen corresponding path program 1 times [2021-11-20 23:14:21,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:14:21,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1493310102] [2021-11-20 23:14:21,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:14:21,024 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:14:21,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:14:21,025 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:14:21,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-20 23:14:21,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:14:21,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 23:14:21,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:14:21,964 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 154 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-20 23:14:21,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:14:22,612 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 154 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-20 23:14:22,613 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:14:22,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1493310102] [2021-11-20 23:14:22,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1493310102] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:14:22,613 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:14:22,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-20 23:14:22,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772274984] [2021-11-20 23:14:22,614 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:14:22,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:14:22,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:14:22,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:14:22,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:14:22,616 INFO L87 Difference]: Start difference. First operand 687 states and 1049 transitions. Second operand has 4 states, 4 states have (on average 44.75) internal successors, (179), 4 states have internal predecessors, (179), 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) [2021-11-20 23:14:23,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:14:23,073 INFO L93 Difference]: Finished difference Result 1499 states and 2319 transitions. [2021-11-20 23:14:23,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:14:23,074 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 44.75) internal successors, (179), 4 states have internal predecessors, (179), 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 176 [2021-11-20 23:14:23,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:14:23,081 INFO L225 Difference]: With dead ends: 1499 [2021-11-20 23:14:23,081 INFO L226 Difference]: Without dead ends: 958 [2021-11-20 23:14:23,082 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 348 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:14:23,084 INFO L933 BasicCegarLoop]: 365 mSDtfsCounter, 315 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 731 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 23:14:23,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [315 Valid, 731 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 23:14:23,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 958 states. [2021-11-20 23:14:23,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 958 to 958. [2021-11-20 23:14:23,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 958 states, 957 states have (on average 1.522466039707419) internal successors, (1457), 957 states have internal predecessors, (1457), 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) [2021-11-20 23:14:23,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 958 states to 958 states and 1457 transitions. [2021-11-20 23:14:23,143 INFO L78 Accepts]: Start accepts. Automaton has 958 states and 1457 transitions. Word has length 176 [2021-11-20 23:14:23,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:14:23,146 INFO L470 AbstractCegarLoop]: Abstraction has 958 states and 1457 transitions. [2021-11-20 23:14:23,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 44.75) internal successors, (179), 4 states have internal predecessors, (179), 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) [2021-11-20 23:14:23,148 INFO L276 IsEmpty]: Start isEmpty. Operand 958 states and 1457 transitions. [2021-11-20 23:14:23,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2021-11-20 23:14:23,155 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:14:23,155 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:14:23,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-20 23:14:23,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:14:23,369 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:14:23,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:14:23,370 INFO L85 PathProgramCache]: Analyzing trace with hash 824529479, now seen corresponding path program 1 times [2021-11-20 23:14:23,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:14:23,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1443828270] [2021-11-20 23:14:23,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:14:23,372 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:14:23,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:14:23,373 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:14:23,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-20 23:14:23,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:14:23,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 23:14:23,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:14:24,500 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 295 proven. 0 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2021-11-20 23:14:24,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:14:25,262 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 295 proven. 0 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2021-11-20 23:14:25,262 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:14:25,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1443828270] [2021-11-20 23:14:25,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1443828270] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:14:25,263 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:14:25,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-20 23:14:25,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965557212] [2021-11-20 23:14:25,263 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:14:25,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:14:25,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:14:25,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:14:25,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:14:25,265 INFO L87 Difference]: Start difference. First operand 958 states and 1457 transitions. Second operand has 4 states, 4 states have (on average 47.5) internal successors, (190), 4 states have internal predecessors, (190), 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) [2021-11-20 23:14:25,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:14:25,688 INFO L93 Difference]: Finished difference Result 2039 states and 3130 transitions. [2021-11-20 23:14:25,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:14:25,689 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 47.5) internal successors, (190), 4 states have internal predecessors, (190), 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 242 [2021-11-20 23:14:25,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:14:25,697 INFO L225 Difference]: With dead ends: 2039 [2021-11-20 23:14:25,697 INFO L226 Difference]: Without dead ends: 1227 [2021-11-20 23:14:25,699 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 482 GetRequests, 480 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:14:25,700 INFO L933 BasicCegarLoop]: 365 mSDtfsCounter, 323 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 729 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 23:14:25,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [323 Valid, 729 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 23:14:25,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1227 states. [2021-11-20 23:14:25,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1227 to 1227. [2021-11-20 23:14:25,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1227 states, 1226 states have (on average 1.5171288743882545) internal successors, (1860), 1226 states have internal predecessors, (1860), 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) [2021-11-20 23:14:25,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1227 states to 1227 states and 1860 transitions. [2021-11-20 23:14:25,756 INFO L78 Accepts]: Start accepts. Automaton has 1227 states and 1860 transitions. Word has length 242 [2021-11-20 23:14:25,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:14:25,757 INFO L470 AbstractCegarLoop]: Abstraction has 1227 states and 1860 transitions. [2021-11-20 23:14:25,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 47.5) internal successors, (190), 4 states have internal predecessors, (190), 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) [2021-11-20 23:14:25,757 INFO L276 IsEmpty]: Start isEmpty. Operand 1227 states and 1860 transitions. [2021-11-20 23:14:25,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2021-11-20 23:14:25,764 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:14:25,764 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 7, 7, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:14:25,790 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-20 23:14:25,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:14:25,979 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:14:25,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:14:25,980 INFO L85 PathProgramCache]: Analyzing trace with hash 220345402, now seen corresponding path program 1 times [2021-11-20 23:14:25,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:14:25,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [585048363] [2021-11-20 23:14:25,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:14:25,982 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:14:25,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:14:25,983 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:14:25,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-20 23:14:26,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:14:26,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 694 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 23:14:26,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:14:27,267 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 486 proven. 0 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2021-11-20 23:14:27,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:14:28,182 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 486 proven. 0 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2021-11-20 23:14:28,182 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:14:28,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [585048363] [2021-11-20 23:14:28,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [585048363] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:14:28,183 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:14:28,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-20 23:14:28,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704303036] [2021-11-20 23:14:28,183 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:14:28,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:14:28,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:14:28,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:14:28,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:14:28,185 INFO L87 Difference]: Start difference. First operand 1227 states and 1860 transitions. Second operand has 4 states, 4 states have (on average 52.0) internal successors, (208), 4 states have internal predecessors, (208), 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) [2021-11-20 23:14:28,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:14:28,598 INFO L93 Difference]: Finished difference Result 2577 states and 3934 transitions. [2021-11-20 23:14:28,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:14:28,599 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 52.0) internal successors, (208), 4 states have internal predecessors, (208), 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 316 [2021-11-20 23:14:28,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:14:28,610 INFO L225 Difference]: With dead ends: 2577 [2021-11-20 23:14:28,610 INFO L226 Difference]: Without dead ends: 1496 [2021-11-20 23:14:28,612 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 630 GetRequests, 628 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:14:28,615 INFO L933 BasicCegarLoop]: 365 mSDtfsCounter, 317 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 729 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 23:14:28,616 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [317 Valid, 729 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 23:14:28,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1496 states. [2021-11-20 23:14:28,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1496 to 1496. [2021-11-20 23:14:28,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1496 states, 1495 states have (on average 1.5123745819397993) internal successors, (2261), 1495 states have internal predecessors, (2261), 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) [2021-11-20 23:14:28,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1496 states to 1496 states and 2261 transitions. [2021-11-20 23:14:28,699 INFO L78 Accepts]: Start accepts. Automaton has 1496 states and 2261 transitions. Word has length 316 [2021-11-20 23:14:28,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:14:28,699 INFO L470 AbstractCegarLoop]: Abstraction has 1496 states and 2261 transitions. [2021-11-20 23:14:28,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 52.0) internal successors, (208), 4 states have internal predecessors, (208), 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) [2021-11-20 23:14:28,700 INFO L276 IsEmpty]: Start isEmpty. Operand 1496 states and 2261 transitions. [2021-11-20 23:14:28,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2021-11-20 23:14:28,709 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:14:28,709 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 9, 9, 8, 8, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:14:28,728 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-20 23:14:28,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:14:28,924 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:14:28,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:14:28,925 INFO L85 PathProgramCache]: Analyzing trace with hash -99567682, now seen corresponding path program 1 times [2021-11-20 23:14:28,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:14:28,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1377162596] [2021-11-20 23:14:28,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:14:28,926 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:14:28,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:14:28,927 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:14:28,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-20 23:14:29,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:14:29,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 849 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 23:14:29,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:14:30,284 INFO L134 CoverageAnalysis]: Checked inductivity of 1243 backedges. 727 proven. 0 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2021-11-20 23:14:30,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:14:31,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1243 backedges. 727 proven. 0 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2021-11-20 23:14:31,260 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:14:31,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1377162596] [2021-11-20 23:14:31,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1377162596] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:14:31,261 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:14:31,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-20 23:14:31,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89077919] [2021-11-20 23:14:31,261 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:14:31,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:14:31,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:14:31,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:14:31,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:14:31,263 INFO L87 Difference]: Start difference. First operand 1496 states and 2261 transitions. Second operand has 4 states, 4 states have (on average 54.25) internal successors, (217), 4 states have internal predecessors, (217), 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) [2021-11-20 23:14:31,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:14:31,691 INFO L93 Difference]: Finished difference Result 3113 states and 4731 transitions. [2021-11-20 23:14:31,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:14:31,692 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 54.25) internal successors, (217), 4 states have internal predecessors, (217), 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 390 [2021-11-20 23:14:31,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:14:31,703 INFO L225 Difference]: With dead ends: 3113 [2021-11-20 23:14:31,704 INFO L226 Difference]: Without dead ends: 1763 [2021-11-20 23:14:31,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 778 GetRequests, 776 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:14:31,707 INFO L933 BasicCegarLoop]: 362 mSDtfsCounter, 317 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 728 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 23:14:31,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [317 Valid, 728 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 23:14:31,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1763 states. [2021-11-20 23:14:31,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1763 to 1763. [2021-11-20 23:14:31,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1763 states, 1762 states have (on average 1.5085130533484676) internal successors, (2658), 1762 states have internal predecessors, (2658), 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) [2021-11-20 23:14:31,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1763 states to 1763 states and 2658 transitions. [2021-11-20 23:14:31,793 INFO L78 Accepts]: Start accepts. Automaton has 1763 states and 2658 transitions. Word has length 390 [2021-11-20 23:14:31,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:14:31,794 INFO L470 AbstractCegarLoop]: Abstraction has 1763 states and 2658 transitions. [2021-11-20 23:14:31,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 54.25) internal successors, (217), 4 states have internal predecessors, (217), 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) [2021-11-20 23:14:31,794 INFO L276 IsEmpty]: Start isEmpty. Operand 1763 states and 2658 transitions. [2021-11-20 23:14:31,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 464 [2021-11-20 23:14:31,806 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:14:31,806 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 11, 11, 10, 10, 9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:14:31,830 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-20 23:14:32,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:14:32,025 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:14:32,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:14:32,025 INFO L85 PathProgramCache]: Analyzing trace with hash -1436869466, now seen corresponding path program 1 times [2021-11-20 23:14:32,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:14:32,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [80414627] [2021-11-20 23:14:32,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:14:32,026 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:14:32,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:14:32,027 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:14:32,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-20 23:14:32,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:14:32,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 989 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 23:14:32,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:14:32,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-20 23:14:32,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-20 23:14:33,811 INFO L134 CoverageAnalysis]: Checked inductivity of 1836 backedges. 929 proven. 0 refuted. 0 times theorem prover too weak. 907 trivial. 0 not checked. [2021-11-20 23:14:33,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:14:35,019 INFO L134 CoverageAnalysis]: Checked inductivity of 1836 backedges. 929 proven. 0 refuted. 0 times theorem prover too weak. 907 trivial. 0 not checked. [2021-11-20 23:14:35,019 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:14:35,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [80414627] [2021-11-20 23:14:35,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [80414627] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:14:35,020 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:14:35,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-20 23:14:35,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659104850] [2021-11-20 23:14:35,021 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:14:35,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:14:35,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:14:35,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:14:35,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:14:35,022 INFO L87 Difference]: Start difference. First operand 1763 states and 2658 transitions. Second operand has 4 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 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) [2021-11-20 23:14:37,038 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:14:39,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:14:39,120 INFO L93 Difference]: Finished difference Result 3971 states and 5992 transitions. [2021-11-20 23:14:39,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:14:39,123 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 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 463 [2021-11-20 23:14:39,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:14:39,136 INFO L225 Difference]: With dead ends: 3971 [2021-11-20 23:14:39,136 INFO L226 Difference]: Without dead ends: 2218 [2021-11-20 23:14:39,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 925 GetRequests, 922 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:14:39,140 INFO L933 BasicCegarLoop]: 262 mSDtfsCounter, 29 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 653 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:14:39,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 653 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 165 Invalid, 1 Unknown, 0 Unchecked, 4.0s Time] [2021-11-20 23:14:39,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2218 states. [2021-11-20 23:14:39,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2218 to 2015. [2021-11-20 23:14:39,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2015 states, 2014 states have (on average 1.5342601787487586) internal successors, (3090), 2014 states have internal predecessors, (3090), 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) [2021-11-20 23:14:39,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2015 states to 2015 states and 3090 transitions. [2021-11-20 23:14:39,222 INFO L78 Accepts]: Start accepts. Automaton has 2015 states and 3090 transitions. Word has length 463 [2021-11-20 23:14:39,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:14:39,223 INFO L470 AbstractCegarLoop]: Abstraction has 2015 states and 3090 transitions. [2021-11-20 23:14:39,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 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) [2021-11-20 23:14:39,223 INFO L276 IsEmpty]: Start isEmpty. Operand 2015 states and 3090 transitions. [2021-11-20 23:14:39,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 466 [2021-11-20 23:14:39,237 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:14:39,237 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 11, 11, 10, 10, 9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:14:39,259 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-20 23:14:39,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:14:39,460 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:14:39,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:14:39,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1634161294, now seen corresponding path program 1 times [2021-11-20 23:14:39,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:14:39,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [179598144] [2021-11-20 23:14:39,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:14:39,462 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:14:39,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:14:39,463 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:14:39,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-20 23:14:39,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:14:39,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 994 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 23:14:40,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:14:41,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1836 backedges. 833 proven. 0 refuted. 0 times theorem prover too weak. 1003 trivial. 0 not checked. [2021-11-20 23:14:41,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:14:42,226 INFO L134 CoverageAnalysis]: Checked inductivity of 1836 backedges. 833 proven. 0 refuted. 0 times theorem prover too weak. 1003 trivial. 0 not checked. [2021-11-20 23:14:42,226 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:14:42,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [179598144] [2021-11-20 23:14:42,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [179598144] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:14:42,226 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:14:42,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-20 23:14:42,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213492957] [2021-11-20 23:14:42,227 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:14:42,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:14:42,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:14:42,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:14:42,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:14:42,229 INFO L87 Difference]: Start difference. First operand 2015 states and 3090 transitions. Second operand has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 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) [2021-11-20 23:14:42,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:14:42,509 INFO L93 Difference]: Finished difference Result 4020 states and 6182 transitions. [2021-11-20 23:14:42,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:14:42,509 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 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 465 [2021-11-20 23:14:42,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:14:42,523 INFO L225 Difference]: With dead ends: 4020 [2021-11-20 23:14:42,523 INFO L226 Difference]: Without dead ends: 2172 [2021-11-20 23:14:42,526 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 928 GetRequests, 927 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:14:42,527 INFO L933 BasicCegarLoop]: 407 mSDtfsCounter, 193 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:14:42,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 596 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 23:14:42,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2172 states. [2021-11-20 23:14:42,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2172 to 2172. [2021-11-20 23:14:42,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2172 states, 2171 states have (on average 1.5301704283740212) internal successors, (3322), 2171 states have internal predecessors, (3322), 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) [2021-11-20 23:14:42,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2172 states to 2172 states and 3322 transitions. [2021-11-20 23:14:42,613 INFO L78 Accepts]: Start accepts. Automaton has 2172 states and 3322 transitions. Word has length 465 [2021-11-20 23:14:42,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:14:42,613 INFO L470 AbstractCegarLoop]: Abstraction has 2172 states and 3322 transitions. [2021-11-20 23:14:42,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 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) [2021-11-20 23:14:42,614 INFO L276 IsEmpty]: Start isEmpty. Operand 2172 states and 3322 transitions. [2021-11-20 23:14:42,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 466 [2021-11-20 23:14:42,626 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:14:42,627 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 11, 11, 10, 10, 9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:14:42,651 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-20 23:14:42,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:14:42,851 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:14:42,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:14:42,851 INFO L85 PathProgramCache]: Analyzing trace with hash 247844560, now seen corresponding path program 1 times [2021-11-20 23:14:42,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:14:42,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1014508159] [2021-11-20 23:14:42,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:14:42,853 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:14:42,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:14:42,853 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:14:42,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-20 23:14:43,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:14:43,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 995 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 23:14:43,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:14:43,540 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-20 23:14:43,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-20 23:14:44,035 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 23:14:44,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-20 23:14:44,773 INFO L134 CoverageAnalysis]: Checked inductivity of 1836 backedges. 1013 proven. 0 refuted. 0 times theorem prover too weak. 823 trivial. 0 not checked. [2021-11-20 23:14:44,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:14:45,940 INFO L134 CoverageAnalysis]: Checked inductivity of 1836 backedges. 1013 proven. 0 refuted. 0 times theorem prover too weak. 823 trivial. 0 not checked. [2021-11-20 23:14:45,940 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:14:45,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1014508159] [2021-11-20 23:14:45,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1014508159] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:14:45,941 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:14:45,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-20 23:14:45,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778372629] [2021-11-20 23:14:45,941 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:14:45,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:14:45,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:14:45,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:14:45,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:14:45,945 INFO L87 Difference]: Start difference. First operand 2172 states and 3322 transitions. Second operand has 5 states, 5 states have (on average 41.4) internal successors, (207), 5 states have internal predecessors, (207), 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) [2021-11-20 23:14:47,968 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:14:52,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:14:52,373 INFO L93 Difference]: Finished difference Result 5353 states and 8207 transitions. [2021-11-20 23:14:52,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:14:52,376 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 41.4) internal successors, (207), 5 states have internal predecessors, (207), 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 465 [2021-11-20 23:14:52,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:14:52,407 INFO L225 Difference]: With dead ends: 5353 [2021-11-20 23:14:52,407 INFO L226 Difference]: Without dead ends: 3191 [2021-11-20 23:14:52,410 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 929 GetRequests, 925 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:14:52,411 INFO L933 BasicCegarLoop]: 299 mSDtfsCounter, 75 mSDsluCounter, 561 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 11 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 860 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2021-11-20 23:14:52,411 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 860 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 371 Invalid, 1 Unknown, 0 Unchecked, 6.3s Time] [2021-11-20 23:14:52,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3191 states. [2021-11-20 23:14:52,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3191 to 2592. [2021-11-20 23:14:52,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2592 states, 2591 states have (on average 1.5785411038209185) internal successors, (4090), 2591 states have internal predecessors, (4090), 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) [2021-11-20 23:14:52,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2592 states to 2592 states and 4090 transitions. [2021-11-20 23:14:52,515 INFO L78 Accepts]: Start accepts. Automaton has 2592 states and 4090 transitions. Word has length 465 [2021-11-20 23:14:52,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:14:52,516 INFO L470 AbstractCegarLoop]: Abstraction has 2592 states and 4090 transitions. [2021-11-20 23:14:52,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 41.4) internal successors, (207), 5 states have internal predecessors, (207), 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) [2021-11-20 23:14:52,516 INFO L276 IsEmpty]: Start isEmpty. Operand 2592 states and 4090 transitions. [2021-11-20 23:14:52,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2021-11-20 23:14:52,524 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:14:52,525 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 12, 12, 12, 11, 11, 10, 10, 9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:14:52,548 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-20 23:14:52,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:14:52,744 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:14:52,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:14:52,745 INFO L85 PathProgramCache]: Analyzing trace with hash 52631452, now seen corresponding path program 1 times [2021-11-20 23:14:52,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:14:52,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [622762779] [2021-11-20 23:14:52,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:14:52,747 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:14:52,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:14:52,748 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:14:52,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-20 23:14:53,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:14:53,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 1026 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 23:14:53,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:14:53,484 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-20 23:14:53,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-20 23:14:53,665 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 23:14:53,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-20 23:14:54,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1976 backedges. 973 proven. 0 refuted. 0 times theorem prover too weak. 1003 trivial. 0 not checked. [2021-11-20 23:14:54,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:14:55,449 INFO L134 CoverageAnalysis]: Checked inductivity of 1976 backedges. 973 proven. 0 refuted. 0 times theorem prover too weak. 1003 trivial. 0 not checked. [2021-11-20 23:14:55,449 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:14:55,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [622762779] [2021-11-20 23:14:55,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [622762779] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:14:55,450 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:14:55,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-20 23:14:55,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555300295] [2021-11-20 23:14:55,450 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:14:55,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 23:14:55,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:14:55,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 23:14:55,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:14:55,452 INFO L87 Difference]: Start difference. First operand 2592 states and 4090 transitions. Second operand has 6 states, 6 states have (on average 28.666666666666668) internal successors, (172), 6 states have internal predecessors, (172), 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) [2021-11-20 23:14:57,494 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:15:04,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:15:04,583 INFO L93 Difference]: Finished difference Result 7520 states and 11633 transitions. [2021-11-20 23:15:04,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:15:04,585 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 28.666666666666668) internal successors, (172), 6 states have internal predecessors, (172), 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 478 [2021-11-20 23:15:04,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:15:04,612 INFO L225 Difference]: With dead ends: 7520 [2021-11-20 23:15:04,613 INFO L226 Difference]: Without dead ends: 4938 [2021-11-20 23:15:04,617 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 956 GetRequests, 950 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:15:04,618 INFO L933 BasicCegarLoop]: 223 mSDtfsCounter, 259 mSDsluCounter, 717 mSDsCounter, 0 mSdLazyCounter, 678 mSolverCounterSat, 71 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 940 SdHoareTripleChecker+Invalid, 750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 678 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.9s IncrementalHoareTripleChecker+Time [2021-11-20 23:15:04,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 940 Invalid, 750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 678 Invalid, 1 Unknown, 0 Unchecked, 8.9s Time] [2021-11-20 23:15:04,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4938 states. [2021-11-20 23:15:04,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4938 to 2816. [2021-11-20 23:15:04,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2816 states, 2815 states have (on average 1.5733570159857904) internal successors, (4429), 2815 states have internal predecessors, (4429), 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) [2021-11-20 23:15:04,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2816 states to 2816 states and 4429 transitions. [2021-11-20 23:15:04,768 INFO L78 Accepts]: Start accepts. Automaton has 2816 states and 4429 transitions. Word has length 478 [2021-11-20 23:15:04,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:15:04,768 INFO L470 AbstractCegarLoop]: Abstraction has 2816 states and 4429 transitions. [2021-11-20 23:15:04,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 28.666666666666668) internal successors, (172), 6 states have internal predecessors, (172), 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) [2021-11-20 23:15:04,769 INFO L276 IsEmpty]: Start isEmpty. Operand 2816 states and 4429 transitions. [2021-11-20 23:15:04,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2021-11-20 23:15:04,777 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:15:04,778 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 11, 11, 10, 10, 9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:15:04,802 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-20 23:15:04,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:15:04,998 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:15:04,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:15:04,999 INFO L85 PathProgramCache]: Analyzing trace with hash 46802419, now seen corresponding path program 1 times [2021-11-20 23:15:05,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:15:05,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [627691528] [2021-11-20 23:15:05,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:15:05,001 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:15:05,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:15:05,002 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:15:05,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-20 23:15:05,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:15:05,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 1030 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 23:15:05,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:15:05,712 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-20 23:15:05,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-20 23:15:05,804 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 23:15:05,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-20 23:15:06,635 INFO L134 CoverageAnalysis]: Checked inductivity of 1911 backedges. 908 proven. 0 refuted. 0 times theorem prover too weak. 1003 trivial. 0 not checked. [2021-11-20 23:15:06,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:15:07,857 INFO L134 CoverageAnalysis]: Checked inductivity of 1911 backedges. 908 proven. 0 refuted. 0 times theorem prover too weak. 1003 trivial. 0 not checked. [2021-11-20 23:15:07,857 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:15:07,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [627691528] [2021-11-20 23:15:07,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [627691528] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:15:07,858 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:15:07,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-20 23:15:07,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012604671] [2021-11-20 23:15:07,858 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:15:07,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 23:15:07,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:15:07,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 23:15:07,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:15:07,860 INFO L87 Difference]: Start difference. First operand 2816 states and 4429 transitions. Second operand has 6 states, 6 states have (on average 28.0) internal successors, (168), 6 states have internal predecessors, (168), 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) [2021-11-20 23:15:09,874 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:15:16,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:15:16,518 INFO L93 Difference]: Finished difference Result 7942 states and 12285 transitions. [2021-11-20 23:15:16,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:15:16,519 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 28.0) internal successors, (168), 6 states have internal predecessors, (168), 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 479 [2021-11-20 23:15:16,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:15:16,545 INFO L225 Difference]: With dead ends: 7942 [2021-11-20 23:15:16,545 INFO L226 Difference]: Without dead ends: 5136 [2021-11-20 23:15:16,550 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 958 GetRequests, 952 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:15:16,551 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 268 mSDsluCounter, 663 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 71 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 867 SdHoareTripleChecker+Invalid, 738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.5s IncrementalHoareTripleChecker+Time [2021-11-20 23:15:16,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [268 Valid, 867 Invalid, 738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 666 Invalid, 1 Unknown, 0 Unchecked, 8.5s Time] [2021-11-20 23:15:16,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5136 states. [2021-11-20 23:15:16,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5136 to 2970. [2021-11-20 23:15:16,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2970 states, 2969 states have (on average 1.554058605591108) internal successors, (4614), 2969 states have internal predecessors, (4614), 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) [2021-11-20 23:15:16,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2970 states to 2970 states and 4614 transitions. [2021-11-20 23:15:16,725 INFO L78 Accepts]: Start accepts. Automaton has 2970 states and 4614 transitions. Word has length 479 [2021-11-20 23:15:16,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:15:16,726 INFO L470 AbstractCegarLoop]: Abstraction has 2970 states and 4614 transitions. [2021-11-20 23:15:16,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 28.0) internal successors, (168), 6 states have internal predecessors, (168), 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) [2021-11-20 23:15:16,727 INFO L276 IsEmpty]: Start isEmpty. Operand 2970 states and 4614 transitions. [2021-11-20 23:15:16,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2021-11-20 23:15:16,735 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:15:16,736 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 11, 11, 10, 10, 9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:15:16,757 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-20 23:15:16,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:15:16,950 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:15:16,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:15:16,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1488665311, now seen corresponding path program 1 times [2021-11-20 23:15:16,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:15:16,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [436040941] [2021-11-20 23:15:16,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:15:16,953 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:15:16,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:15:16,954 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:15:16,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-20 23:15:17,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:15:17,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 1029 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 23:15:17,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:15:17,696 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-20 23:15:17,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-20 23:15:17,823 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 23:15:17,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-20 23:15:18,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1924 backedges. 921 proven. 0 refuted. 0 times theorem prover too weak. 1003 trivial. 0 not checked. [2021-11-20 23:15:18,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:15:19,652 INFO L134 CoverageAnalysis]: Checked inductivity of 1924 backedges. 921 proven. 0 refuted. 0 times theorem prover too weak. 1003 trivial. 0 not checked. [2021-11-20 23:15:19,652 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:15:19,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [436040941] [2021-11-20 23:15:19,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [436040941] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:15:19,653 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:15:19,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-20 23:15:19,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158203637] [2021-11-20 23:15:19,653 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:15:19,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 23:15:19,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:15:19,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 23:15:19,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:15:19,655 INFO L87 Difference]: Start difference. First operand 2970 states and 4614 transitions. Second operand has 6 states, 6 states have (on average 28.166666666666668) internal successors, (169), 6 states have internal predecessors, (169), 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) [2021-11-20 23:15:21,670 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:15:28,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:15:28,361 INFO L93 Difference]: Finished difference Result 8096 states and 12417 transitions. [2021-11-20 23:15:28,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:15:28,361 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 28.166666666666668) internal successors, (169), 6 states have internal predecessors, (169), 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 479 [2021-11-20 23:15:28,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:15:28,373 INFO L225 Difference]: With dead ends: 8096 [2021-11-20 23:15:28,373 INFO L226 Difference]: Without dead ends: 5136 [2021-11-20 23:15:28,377 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 958 GetRequests, 952 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:15:28,378 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 265 mSDsluCounter, 650 mSDsCounter, 0 mSdLazyCounter, 659 mSolverCounterSat, 71 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 853 SdHoareTripleChecker+Invalid, 731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 659 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.5s IncrementalHoareTripleChecker+Time [2021-11-20 23:15:28,378 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [265 Valid, 853 Invalid, 731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 659 Invalid, 1 Unknown, 0 Unchecked, 8.5s Time] [2021-11-20 23:15:28,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5136 states. [2021-11-20 23:15:28,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5136 to 2984. [2021-11-20 23:15:28,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2984 states, 2983 states have (on average 1.538384177003017) internal successors, (4589), 2983 states have internal predecessors, (4589), 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) [2021-11-20 23:15:28,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2984 states to 2984 states and 4589 transitions. [2021-11-20 23:15:28,533 INFO L78 Accepts]: Start accepts. Automaton has 2984 states and 4589 transitions. Word has length 479 [2021-11-20 23:15:28,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:15:28,534 INFO L470 AbstractCegarLoop]: Abstraction has 2984 states and 4589 transitions. [2021-11-20 23:15:28,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 28.166666666666668) internal successors, (169), 6 states have internal predecessors, (169), 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) [2021-11-20 23:15:28,534 INFO L276 IsEmpty]: Start isEmpty. Operand 2984 states and 4589 transitions. [2021-11-20 23:15:28,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2021-11-20 23:15:28,580 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:15:28,580 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 12, 12, 12, 11, 11, 10, 10, 9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:15:28,613 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-20 23:15:28,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:15:28,791 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:15:28,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:15:28,791 INFO L85 PathProgramCache]: Analyzing trace with hash 971100200, now seen corresponding path program 1 times [2021-11-20 23:15:28,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:15:28,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [93466000] [2021-11-20 23:15:28,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:15:28,793 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:15:28,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:15:28,795 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:15:28,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-20 23:15:29,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:15:29,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 1021 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 23:15:29,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:15:29,569 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-20 23:15:29,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-20 23:15:29,753 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 23:15:29,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-20 23:15:30,435 INFO L134 CoverageAnalysis]: Checked inductivity of 2002 backedges. 999 proven. 0 refuted. 0 times theorem prover too weak. 1003 trivial. 0 not checked. [2021-11-20 23:15:30,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:15:31,464 INFO L134 CoverageAnalysis]: Checked inductivity of 2002 backedges. 999 proven. 0 refuted. 0 times theorem prover too weak. 1003 trivial. 0 not checked. [2021-11-20 23:15:31,464 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:15:31,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [93466000] [2021-11-20 23:15:31,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [93466000] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:15:31,465 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:15:31,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-20 23:15:31,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695992586] [2021-11-20 23:15:31,465 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:15:31,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 23:15:31,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:15:31,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 23:15:31,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:15:31,466 INFO L87 Difference]: Start difference. First operand 2984 states and 4589 transitions. Second operand has 6 states, 6 states have (on average 29.166666666666668) internal successors, (175), 6 states have internal predecessors, (175), 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) [2021-11-20 23:15:33,479 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:15:35,496 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:15:42,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:15:42,027 INFO L93 Difference]: Finished difference Result 8084 states and 12313 transitions. [2021-11-20 23:15:42,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:15:42,030 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 29.166666666666668) internal successors, (175), 6 states have internal predecessors, (175), 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 479 [2021-11-20 23:15:42,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:15:42,040 INFO L225 Difference]: With dead ends: 8084 [2021-11-20 23:15:42,041 INFO L226 Difference]: Without dead ends: 5110 [2021-11-20 23:15:42,044 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 958 GetRequests, 952 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:15:42,045 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 250 mSDsluCounter, 661 mSDsCounter, 0 mSdLazyCounter, 659 mSolverCounterSat, 70 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 864 SdHoareTripleChecker+Invalid, 731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 659 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.4s IncrementalHoareTripleChecker+Time [2021-11-20 23:15:42,045 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 864 Invalid, 731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 659 Invalid, 2 Unknown, 0 Unchecked, 10.4s Time] [2021-11-20 23:15:42,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5110 states. [2021-11-20 23:15:42,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5110 to 3068. [2021-11-20 23:15:42,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3068 states, 3067 states have (on average 1.538311053146397) internal successors, (4718), 3067 states have internal predecessors, (4718), 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) [2021-11-20 23:15:42,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3068 states to 3068 states and 4718 transitions. [2021-11-20 23:15:42,204 INFO L78 Accepts]: Start accepts. Automaton has 3068 states and 4718 transitions. Word has length 479 [2021-11-20 23:15:42,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:15:42,204 INFO L470 AbstractCegarLoop]: Abstraction has 3068 states and 4718 transitions. [2021-11-20 23:15:42,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 29.166666666666668) internal successors, (175), 6 states have internal predecessors, (175), 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) [2021-11-20 23:15:42,205 INFO L276 IsEmpty]: Start isEmpty. Operand 3068 states and 4718 transitions. [2021-11-20 23:15:42,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2021-11-20 23:15:42,214 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:15:42,214 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 11, 11, 10, 10, 9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:15:42,242 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-20 23:15:42,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:15:42,442 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:15:42,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:15:42,442 INFO L85 PathProgramCache]: Analyzing trace with hash -1237242008, now seen corresponding path program 1 times [2021-11-20 23:15:42,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:15:42,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [444512304] [2021-11-20 23:15:42,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:15:42,443 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:15:42,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:15:42,444 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:15:42,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-20 23:15:42,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:15:42,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 1028 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 23:15:42,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:15:43,140 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-20 23:15:43,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-20 23:15:43,295 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 23:15:43,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-20 23:15:44,040 INFO L134 CoverageAnalysis]: Checked inductivity of 1989 backedges. 986 proven. 0 refuted. 0 times theorem prover too weak. 1003 trivial. 0 not checked. [2021-11-20 23:15:44,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:15:45,110 INFO L134 CoverageAnalysis]: Checked inductivity of 1989 backedges. 986 proven. 0 refuted. 0 times theorem prover too weak. 1003 trivial. 0 not checked. [2021-11-20 23:15:45,110 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:15:45,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [444512304] [2021-11-20 23:15:45,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [444512304] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:15:45,111 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:15:45,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-20 23:15:45,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563163381] [2021-11-20 23:15:45,112 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:15:45,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 23:15:45,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:15:45,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 23:15:45,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:15:45,114 INFO L87 Difference]: Start difference. First operand 3068 states and 4718 transitions. Second operand has 6 states, 6 states have (on average 29.0) internal successors, (174), 6 states have internal predecessors, (174), 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) [2021-11-20 23:15:47,130 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:15:49,143 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:15:55,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:15:55,383 INFO L93 Difference]: Finished difference Result 8144 states and 12379 transitions. [2021-11-20 23:15:55,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:15:55,384 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 29.0) internal successors, (174), 6 states have internal predecessors, (174), 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 479 [2021-11-20 23:15:55,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:15:55,394 INFO L225 Difference]: With dead ends: 8144 [2021-11-20 23:15:55,395 INFO L226 Difference]: Without dead ends: 5086 [2021-11-20 23:15:55,398 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 958 GetRequests, 952 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:15:55,399 INFO L933 BasicCegarLoop]: 202 mSDtfsCounter, 250 mSDsluCounter, 659 mSDsCounter, 0 mSdLazyCounter, 652 mSolverCounterSat, 69 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 861 SdHoareTripleChecker+Invalid, 723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 652 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:15:55,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 861 Invalid, 723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 652 Invalid, 2 Unknown, 0 Unchecked, 10.1s Time] [2021-11-20 23:15:55,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5086 states. [2021-11-20 23:15:55,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5086 to 3068. [2021-11-20 23:15:55,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3068 states, 3067 states have (on average 1.5255950440169548) internal successors, (4679), 3067 states have internal predecessors, (4679), 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) [2021-11-20 23:15:55,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3068 states to 3068 states and 4679 transitions. [2021-11-20 23:15:55,564 INFO L78 Accepts]: Start accepts. Automaton has 3068 states and 4679 transitions. Word has length 479 [2021-11-20 23:15:55,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:15:55,565 INFO L470 AbstractCegarLoop]: Abstraction has 3068 states and 4679 transitions. [2021-11-20 23:15:55,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 29.0) internal successors, (174), 6 states have internal predecessors, (174), 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) [2021-11-20 23:15:55,565 INFO L276 IsEmpty]: Start isEmpty. Operand 3068 states and 4679 transitions. [2021-11-20 23:15:55,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 481 [2021-11-20 23:15:55,574 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:15:55,575 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 11, 11, 10, 10, 9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:15:55,602 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-20 23:15:55,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:15:55,793 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:15:55,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:15:55,793 INFO L85 PathProgramCache]: Analyzing trace with hash -1622159917, now seen corresponding path program 1 times [2021-11-20 23:15:55,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:15:55,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [965682605] [2021-11-20 23:15:55,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:15:55,795 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:15:55,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:15:55,797 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:15:55,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-20 23:15:56,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:15:56,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 1031 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 23:15:56,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:15:56,508 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-20 23:15:56,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-20 23:15:56,628 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 23:15:56,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-20 23:15:57,450 INFO L134 CoverageAnalysis]: Checked inductivity of 1937 backedges. 934 proven. 0 refuted. 0 times theorem prover too weak. 1003 trivial. 0 not checked. [2021-11-20 23:15:57,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:15:58,549 INFO L134 CoverageAnalysis]: Checked inductivity of 1937 backedges. 934 proven. 0 refuted. 0 times theorem prover too weak. 1003 trivial. 0 not checked. [2021-11-20 23:15:58,549 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:15:58,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [965682605] [2021-11-20 23:15:58,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [965682605] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:15:58,549 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:15:58,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-20 23:15:58,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216722973] [2021-11-20 23:15:58,550 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:15:58,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 23:15:58,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:15:58,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 23:15:58,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:15:58,555 INFO L87 Difference]: Start difference. First operand 3068 states and 4679 transitions. Second operand has 6 states, 6 states have (on average 28.5) internal successors, (171), 6 states have internal predecessors, (171), 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) [2021-11-20 23:16:00,569 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:16:02,577 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:16:07,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:16:07,094 INFO L93 Difference]: Finished difference Result 8144 states and 12301 transitions. [2021-11-20 23:16:07,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:16:07,095 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 28.5) internal successors, (171), 6 states have internal predecessors, (171), 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 480 [2021-11-20 23:16:07,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:16:07,106 INFO L225 Difference]: With dead ends: 8144 [2021-11-20 23:16:07,106 INFO L226 Difference]: Without dead ends: 5086 [2021-11-20 23:16:07,112 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 960 GetRequests, 954 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:16:07,112 INFO L933 BasicCegarLoop]: 201 mSDtfsCounter, 256 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 69 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 659 SdHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2021-11-20 23:16:07,113 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 659 Invalid, 568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 497 Invalid, 2 Unknown, 0 Unchecked, 8.3s Time] [2021-11-20 23:16:07,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5086 states. [2021-11-20 23:16:07,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5086 to 3068. [2021-11-20 23:16:07,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3068 states, 3067 states have (on average 1.5083143136615584) internal successors, (4626), 3067 states have internal predecessors, (4626), 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) [2021-11-20 23:16:07,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3068 states to 3068 states and 4626 transitions. [2021-11-20 23:16:07,268 INFO L78 Accepts]: Start accepts. Automaton has 3068 states and 4626 transitions. Word has length 480 [2021-11-20 23:16:07,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:16:07,269 INFO L470 AbstractCegarLoop]: Abstraction has 3068 states and 4626 transitions. [2021-11-20 23:16:07,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 28.5) internal successors, (171), 6 states have internal predecessors, (171), 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) [2021-11-20 23:16:07,269 INFO L276 IsEmpty]: Start isEmpty. Operand 3068 states and 4626 transitions. [2021-11-20 23:16:07,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 482 [2021-11-20 23:16:07,278 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:16:07,278 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 11, 11, 10, 10, 9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:16:07,298 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-20 23:16:07,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:16:07,495 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:16:07,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:16:07,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1845644678, now seen corresponding path program 1 times [2021-11-20 23:16:07,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:16:07,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [600715571] [2021-11-20 23:16:07,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:16:07,496 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:16:07,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:16:07,497 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:16:07,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-20 23:16:07,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:16:07,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 1033 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 23:16:07,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:16:08,194 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-20 23:16:08,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-20 23:16:08,308 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 23:16:08,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-20 23:16:09,015 INFO L134 CoverageAnalysis]: Checked inductivity of 1950 backedges. 947 proven. 0 refuted. 0 times theorem prover too weak. 1003 trivial. 0 not checked. [2021-11-20 23:16:09,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:16:10,003 INFO L134 CoverageAnalysis]: Checked inductivity of 1950 backedges. 947 proven. 0 refuted. 0 times theorem prover too weak. 1003 trivial. 0 not checked. [2021-11-20 23:16:10,003 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:16:10,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [600715571] [2021-11-20 23:16:10,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [600715571] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:16:10,003 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:16:10,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-20 23:16:10,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835981721] [2021-11-20 23:16:10,004 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:16:10,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 23:16:10,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:16:10,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 23:16:10,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:16:10,005 INFO L87 Difference]: Start difference. First operand 3068 states and 4626 transitions. Second operand has 6 states, 6 states have (on average 28.833333333333332) internal successors, (173), 6 states have internal predecessors, (173), 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) [2021-11-20 23:16:12,018 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:16:14,035 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:16:18,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:16:18,906 INFO L93 Difference]: Finished difference Result 8144 states and 12195 transitions. [2021-11-20 23:16:18,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:16:18,907 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 28.833333333333332) internal successors, (173), 6 states have internal predecessors, (173), 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 481 [2021-11-20 23:16:18,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:16:18,913 INFO L225 Difference]: With dead ends: 8144 [2021-11-20 23:16:18,913 INFO L226 Difference]: Without dead ends: 5086 [2021-11-20 23:16:18,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 962 GetRequests, 956 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:16:18,917 INFO L933 BasicCegarLoop]: 200 mSDtfsCounter, 252 mSDsluCounter, 457 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 69 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 657 SdHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.7s IncrementalHoareTripleChecker+Time [2021-11-20 23:16:18,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 657 Invalid, 568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 497 Invalid, 2 Unknown, 0 Unchecked, 8.7s Time] [2021-11-20 23:16:18,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5086 states. [2021-11-20 23:16:19,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5086 to 3068. [2021-11-20 23:16:19,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3068 states, 3067 states have (on average 1.4910335833061623) internal successors, (4573), 3067 states have internal predecessors, (4573), 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) [2021-11-20 23:16:19,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3068 states to 3068 states and 4573 transitions. [2021-11-20 23:16:19,083 INFO L78 Accepts]: Start accepts. Automaton has 3068 states and 4573 transitions. Word has length 481 [2021-11-20 23:16:19,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:16:19,084 INFO L470 AbstractCegarLoop]: Abstraction has 3068 states and 4573 transitions. [2021-11-20 23:16:19,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 28.833333333333332) internal successors, (173), 6 states have internal predecessors, (173), 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) [2021-11-20 23:16:19,084 INFO L276 IsEmpty]: Start isEmpty. Operand 3068 states and 4573 transitions. [2021-11-20 23:16:19,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2021-11-20 23:16:19,092 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:16:19,092 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 11, 11, 10, 10, 9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:16:19,113 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-20 23:16:19,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:16:19,313 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:16:19,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:16:19,313 INFO L85 PathProgramCache]: Analyzing trace with hash 1539079118, now seen corresponding path program 1 times [2021-11-20 23:16:19,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:16:19,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1639966200] [2021-11-20 23:16:19,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:16:19,314 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:16:19,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:16:19,315 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:16:19,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-20 23:16:19,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:16:19,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 1035 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 23:16:19,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:16:19,991 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-20 23:16:19,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-20 23:16:20,120 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 23:16:20,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-20 23:16:20,818 INFO L134 CoverageAnalysis]: Checked inductivity of 1963 backedges. 960 proven. 0 refuted. 0 times theorem prover too weak. 1003 trivial. 0 not checked. [2021-11-20 23:16:20,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:16:21,851 INFO L134 CoverageAnalysis]: Checked inductivity of 1963 backedges. 960 proven. 0 refuted. 0 times theorem prover too weak. 1003 trivial. 0 not checked. [2021-11-20 23:16:21,852 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:16:21,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1639966200] [2021-11-20 23:16:21,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1639966200] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:16:21,852 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:16:21,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-20 23:16:21,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464914718] [2021-11-20 23:16:21,853 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:16:21,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 23:16:21,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:16:21,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 23:16:21,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:16:21,855 INFO L87 Difference]: Start difference. First operand 3068 states and 4573 transitions. Second operand has 6 states, 6 states have (on average 29.166666666666668) internal successors, (175), 6 states have internal predecessors, (175), 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) [2021-11-20 23:16:23,866 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:16:29,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:16:29,412 INFO L93 Difference]: Finished difference Result 7884 states and 11751 transitions. [2021-11-20 23:16:29,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:16:29,413 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 29.166666666666668) internal successors, (175), 6 states have internal predecessors, (175), 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 482 [2021-11-20 23:16:29,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:16:29,418 INFO L225 Difference]: With dead ends: 7884 [2021-11-20 23:16:29,418 INFO L226 Difference]: Without dead ends: 4826 [2021-11-20 23:16:29,422 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 964 GetRequests, 958 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:16:29,422 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 235 mSDsluCounter, 639 mSDsCounter, 0 mSdLazyCounter, 597 mSolverCounterSat, 58 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 842 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 597 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2021-11-20 23:16:29,423 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 842 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 597 Invalid, 1 Unknown, 0 Unchecked, 7.3s Time] [2021-11-20 23:16:29,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4826 states. [2021-11-20 23:16:29,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4826 to 3068. [2021-11-20 23:16:29,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3068 states, 3067 states have (on average 1.4737528529507662) internal successors, (4520), 3067 states have internal predecessors, (4520), 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) [2021-11-20 23:16:29,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3068 states to 3068 states and 4520 transitions. [2021-11-20 23:16:29,608 INFO L78 Accepts]: Start accepts. Automaton has 3068 states and 4520 transitions. Word has length 482 [2021-11-20 23:16:29,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:16:29,609 INFO L470 AbstractCegarLoop]: Abstraction has 3068 states and 4520 transitions. [2021-11-20 23:16:29,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 29.166666666666668) internal successors, (175), 6 states have internal predecessors, (175), 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) [2021-11-20 23:16:29,609 INFO L276 IsEmpty]: Start isEmpty. Operand 3068 states and 4520 transitions. [2021-11-20 23:16:29,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2021-11-20 23:16:29,616 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:16:29,616 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 12, 12, 12, 11, 11, 10, 10, 9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:16:29,639 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-20 23:16:29,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:16:29,837 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:16:29,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:16:29,837 INFO L85 PathProgramCache]: Analyzing trace with hash -2059072220, now seen corresponding path program 1 times [2021-11-20 23:16:29,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:16:29,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1821283225] [2021-11-20 23:16:29,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:16:29,838 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:16:29,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:16:29,839 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:16:29,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-20 23:16:30,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:16:30,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 1032 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 23:16:30,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:16:30,517 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-20 23:16:30,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-20 23:16:30,729 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 23:16:30,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-20 23:16:31,427 INFO L134 CoverageAnalysis]: Checked inductivity of 2018 backedges. 1015 proven. 0 refuted. 0 times theorem prover too weak. 1003 trivial. 0 not checked. [2021-11-20 23:16:31,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:16:32,497 INFO L134 CoverageAnalysis]: Checked inductivity of 2018 backedges. 1015 proven. 0 refuted. 0 times theorem prover too weak. 1003 trivial. 0 not checked. [2021-11-20 23:16:32,497 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:16:32,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1821283225] [2021-11-20 23:16:32,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1821283225] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:16:32,498 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:16:32,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-20 23:16:32,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965442379] [2021-11-20 23:16:32,499 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:16:32,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 23:16:32,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:16:32,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 23:16:32,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:16:32,500 INFO L87 Difference]: Start difference. First operand 3068 states and 4520 transitions. Second operand has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 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) [2021-11-20 23:16:34,523 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:16:36,534 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:16:43,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:16:43,399 INFO L93 Difference]: Finished difference Result 7912 states and 11644 transitions. [2021-11-20 23:16:43,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:16:43,401 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 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 482 [2021-11-20 23:16:43,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:16:43,404 INFO L225 Difference]: With dead ends: 7912 [2021-11-20 23:16:43,404 INFO L226 Difference]: Without dead ends: 5078 [2021-11-20 23:16:43,407 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 964 GetRequests, 958 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:16:43,407 INFO L933 BasicCegarLoop]: 351 mSDtfsCounter, 216 mSDsluCounter, 1034 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 39 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 1385 SdHoareTripleChecker+Invalid, 723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 682 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.6s IncrementalHoareTripleChecker+Time [2021-11-20 23:16:43,407 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 1385 Invalid, 723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 682 Invalid, 2 Unknown, 0 Unchecked, 10.6s Time] [2021-11-20 23:16:43,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5078 states. [2021-11-20 23:16:43,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5078 to 3334. [2021-11-20 23:16:43,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3334 states, 3333 states have (on average 1.4494449444944495) internal successors, (4831), 3333 states have internal predecessors, (4831), 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) [2021-11-20 23:16:43,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3334 states to 3334 states and 4831 transitions. [2021-11-20 23:16:43,585 INFO L78 Accepts]: Start accepts. Automaton has 3334 states and 4831 transitions. Word has length 482 [2021-11-20 23:16:43,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:16:43,585 INFO L470 AbstractCegarLoop]: Abstraction has 3334 states and 4831 transitions. [2021-11-20 23:16:43,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 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) [2021-11-20 23:16:43,586 INFO L276 IsEmpty]: Start isEmpty. Operand 3334 states and 4831 transitions. [2021-11-20 23:16:43,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 484 [2021-11-20 23:16:43,593 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:16:43,593 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 12, 12, 11, 11, 10, 10, 9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:16:43,614 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-20 23:16:43,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:16:43,814 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:16:43,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:16:43,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1004546517, now seen corresponding path program 1 times [2021-11-20 23:16:43,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:16:43,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [589632596] [2021-11-20 23:16:43,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:16:43,815 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:16:43,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:16:43,816 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:16:43,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-20 23:16:44,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:16:44,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 1034 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 23:16:44,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:16:44,515 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-20 23:16:44,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-20 23:16:44,721 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 23:16:44,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-20 23:16:45,582 INFO L134 CoverageAnalysis]: Checked inductivity of 2030 backedges. 1027 proven. 0 refuted. 0 times theorem prover too weak. 1003 trivial. 0 not checked. [2021-11-20 23:16:45,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:16:46,759 INFO L134 CoverageAnalysis]: Checked inductivity of 2030 backedges. 1027 proven. 0 refuted. 0 times theorem prover too weak. 1003 trivial. 0 not checked. [2021-11-20 23:16:46,760 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:16:46,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [589632596] [2021-11-20 23:16:46,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [589632596] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:16:46,760 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:16:46,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-20 23:16:46,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762579929] [2021-11-20 23:16:46,760 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:16:46,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 23:16:46,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:16:46,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 23:16:46,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:16:46,762 INFO L87 Difference]: Start difference. First operand 3334 states and 4831 transitions. Second operand has 6 states, 6 states have (on average 30.166666666666668) internal successors, (181), 6 states have internal predecessors, (181), 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) [2021-11-20 23:16:48,773 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:16:52,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:16:52,970 INFO L93 Difference]: Finished difference Result 8170 states and 11906 transitions. [2021-11-20 23:16:52,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:16:52,971 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 30.166666666666668) internal successors, (181), 6 states have internal predecessors, (181), 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 483 [2021-11-20 23:16:52,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:16:52,974 INFO L225 Difference]: With dead ends: 8170 [2021-11-20 23:16:52,974 INFO L226 Difference]: Without dead ends: 5089 [2021-11-20 23:16:52,976 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 966 GetRequests, 960 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:16:52,977 INFO L933 BasicCegarLoop]: 201 mSDtfsCounter, 222 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 57 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 636 SdHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:16:52,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 636 Invalid, 514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 456 Invalid, 1 Unknown, 0 Unchecked, 6.0s Time] [2021-11-20 23:16:52,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5089 states. [2021-11-20 23:16:53,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5089 to 3359. [2021-11-20 23:16:53,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3359 states, 3358 states have (on average 1.4389517569982133) internal successors, (4832), 3358 states have internal predecessors, (4832), 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) [2021-11-20 23:16:53,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3359 states to 3359 states and 4832 transitions. [2021-11-20 23:16:53,159 INFO L78 Accepts]: Start accepts. Automaton has 3359 states and 4832 transitions. Word has length 483 [2021-11-20 23:16:53,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:16:53,159 INFO L470 AbstractCegarLoop]: Abstraction has 3359 states and 4832 transitions. [2021-11-20 23:16:53,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 30.166666666666668) internal successors, (181), 6 states have internal predecessors, (181), 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) [2021-11-20 23:16:53,160 INFO L276 IsEmpty]: Start isEmpty. Operand 3359 states and 4832 transitions. [2021-11-20 23:16:53,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 485 [2021-11-20 23:16:53,167 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:16:53,168 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 12, 11, 11, 10, 10, 9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:16:53,190 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-20 23:16:53,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:16:53,386 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:16:53,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:16:53,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1499794591, now seen corresponding path program 1 times [2021-11-20 23:16:53,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:16:53,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [127644559] [2021-11-20 23:16:53,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:16:53,387 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:16:53,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:16:53,388 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:16:53,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-20 23:16:53,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:16:53,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 1036 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 23:16:53,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:16:54,040 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-20 23:16:54,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-20 23:16:54,228 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 23:16:54,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-20 23:16:54,916 INFO L134 CoverageAnalysis]: Checked inductivity of 2042 backedges. 1039 proven. 0 refuted. 0 times theorem prover too weak. 1003 trivial. 0 not checked. [2021-11-20 23:16:54,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:16:55,946 INFO L134 CoverageAnalysis]: Checked inductivity of 2042 backedges. 1039 proven. 0 refuted. 0 times theorem prover too weak. 1003 trivial. 0 not checked. [2021-11-20 23:16:55,946 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:16:55,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [127644559] [2021-11-20 23:16:55,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [127644559] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:16:55,946 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:16:55,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-20 23:16:55,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389468792] [2021-11-20 23:16:55,947 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:16:55,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 23:16:55,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:16:55,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 23:16:55,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:16:55,948 INFO L87 Difference]: Start difference. First operand 3359 states and 4832 transitions. Second operand has 6 states, 6 states have (on average 30.5) internal successors, (183), 6 states have internal predecessors, (183), 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) [2021-11-20 23:16:57,963 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:17:02,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:17:02,527 INFO L93 Difference]: Finished difference Result 8176 states and 11871 transitions. [2021-11-20 23:17:02,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:17:02,528 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 30.5) internal successors, (183), 6 states have internal predecessors, (183), 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 484 [2021-11-20 23:17:02,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:17:02,531 INFO L225 Difference]: With dead ends: 8176 [2021-11-20 23:17:02,531 INFO L226 Difference]: Without dead ends: 5082 [2021-11-20 23:17:02,533 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 968 GetRequests, 962 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:17:02,534 INFO L933 BasicCegarLoop]: 200 mSDtfsCounter, 216 mSDsluCounter, 460 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 55 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 660 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2021-11-20 23:17:02,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 660 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 466 Invalid, 1 Unknown, 0 Unchecked, 6.3s Time] [2021-11-20 23:17:02,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5082 states. [2021-11-20 23:17:02,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5082 to 3401. [2021-11-20 23:17:02,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3401 states, 3400 states have (on average 1.438235294117647) internal successors, (4890), 3400 states have internal predecessors, (4890), 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) [2021-11-20 23:17:02,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3401 states to 3401 states and 4890 transitions. [2021-11-20 23:17:02,724 INFO L78 Accepts]: Start accepts. Automaton has 3401 states and 4890 transitions. Word has length 484 [2021-11-20 23:17:02,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:17:02,724 INFO L470 AbstractCegarLoop]: Abstraction has 3401 states and 4890 transitions. [2021-11-20 23:17:02,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 30.5) internal successors, (183), 6 states have internal predecessors, (183), 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) [2021-11-20 23:17:02,724 INFO L276 IsEmpty]: Start isEmpty. Operand 3401 states and 4890 transitions. [2021-11-20 23:17:02,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2021-11-20 23:17:02,732 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:17:02,732 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 11, 11, 10, 10, 9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:17:02,749 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-20 23:17:02,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:17:02,939 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:17:02,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:17:02,939 INFO L85 PathProgramCache]: Analyzing trace with hash 350662487, now seen corresponding path program 1 times [2021-11-20 23:17:02,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:17:02,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1332455233] [2021-11-20 23:17:02,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:17:02,940 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:17:02,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:17:02,942 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:17:02,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-20 23:17:03,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:17:03,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 1037 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 23:17:03,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:17:03,576 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-20 23:17:03,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-20 23:17:03,776 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 23:17:03,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-20 23:17:04,501 INFO L134 CoverageAnalysis]: Checked inductivity of 2056 backedges. 1053 proven. 0 refuted. 0 times theorem prover too weak. 1003 trivial. 0 not checked. [2021-11-20 23:17:04,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:17:05,626 INFO L134 CoverageAnalysis]: Checked inductivity of 2056 backedges. 1053 proven. 0 refuted. 0 times theorem prover too weak. 1003 trivial. 0 not checked. [2021-11-20 23:17:05,626 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:17:05,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1332455233] [2021-11-20 23:17:05,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1332455233] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:17:05,626 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:17:05,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-20 23:17:05,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640312869] [2021-11-20 23:17:05,627 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:17:05,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 23:17:05,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:17:05,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 23:17:05,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:17:05,628 INFO L87 Difference]: Start difference. First operand 3401 states and 4890 transitions. Second operand has 6 states, 6 states have (on average 31.166666666666668) internal successors, (187), 6 states have internal predecessors, (187), 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) [2021-11-20 23:17:07,640 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:17:13,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:17:13,615 INFO L93 Difference]: Finished difference Result 8735 states and 12585 transitions. [2021-11-20 23:17:13,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:17:13,618 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 31.166666666666668) internal successors, (187), 6 states have internal predecessors, (187), 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 487 [2021-11-20 23:17:13,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:17:13,622 INFO L225 Difference]: With dead ends: 8735 [2021-11-20 23:17:13,622 INFO L226 Difference]: Without dead ends: 5355 [2021-11-20 23:17:13,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 974 GetRequests, 968 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:17:13,626 INFO L933 BasicCegarLoop]: 214 mSDtfsCounter, 213 mSDsluCounter, 697 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 55 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 911 SdHoareTripleChecker+Invalid, 664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2021-11-20 23:17:13,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 911 Invalid, 664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 608 Invalid, 1 Unknown, 0 Unchecked, 7.7s Time] [2021-11-20 23:17:13,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5355 states. [2021-11-20 23:17:13,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5355 to 3688. [2021-11-20 23:17:13,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3688 states, 3687 states have (on average 1.4184974233794412) internal successors, (5230), 3687 states have internal predecessors, (5230), 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) [2021-11-20 23:17:13,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3688 states to 3688 states and 5230 transitions. [2021-11-20 23:17:13,805 INFO L78 Accepts]: Start accepts. Automaton has 3688 states and 5230 transitions. Word has length 487 [2021-11-20 23:17:13,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:17:13,805 INFO L470 AbstractCegarLoop]: Abstraction has 3688 states and 5230 transitions. [2021-11-20 23:17:13,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 31.166666666666668) internal successors, (187), 6 states have internal predecessors, (187), 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) [2021-11-20 23:17:13,805 INFO L276 IsEmpty]: Start isEmpty. Operand 3688 states and 5230 transitions. [2021-11-20 23:17:13,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2021-11-20 23:17:13,810 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:17:13,811 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 12, 12, 10, 10, 9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:17:13,824 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-20 23:17:14,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:17:14,011 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:17:14,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:17:14,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1443157333, now seen corresponding path program 1 times [2021-11-20 23:17:14,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:17:14,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1888501139] [2021-11-20 23:17:14,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:17:14,014 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:17:14,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:17:14,015 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:17:14,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-20 23:17:14,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:17:14,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 1042 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 23:17:14,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:17:14,650 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-20 23:17:14,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-20 23:17:14,873 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 23:17:14,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-20 23:17:15,582 INFO L134 CoverageAnalysis]: Checked inductivity of 2076 backedges. 1073 proven. 0 refuted. 0 times theorem prover too weak. 1003 trivial. 0 not checked. [2021-11-20 23:17:15,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:17:16,612 INFO L134 CoverageAnalysis]: Checked inductivity of 2076 backedges. 1073 proven. 0 refuted. 0 times theorem prover too weak. 1003 trivial. 0 not checked. [2021-11-20 23:17:16,613 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:17:16,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1888501139] [2021-11-20 23:17:16,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1888501139] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:17:16,613 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:17:16,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-20 23:17:16,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761447052] [2021-11-20 23:17:16,613 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:17:16,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 23:17:16,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:17:16,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 23:17:16,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:17:16,614 INFO L87 Difference]: Start difference. First operand 3688 states and 5230 transitions. Second operand has 6 states, 6 states have (on average 31.5) internal successors, (189), 6 states have internal predecessors, (189), 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) [2021-11-20 23:17:18,625 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:17:22,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:17:22,862 INFO L93 Difference]: Finished difference Result 9334 states and 13289 transitions. [2021-11-20 23:17:22,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:17:22,865 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 31.5) internal successors, (189), 6 states have internal predecessors, (189), 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 487 [2021-11-20 23:17:22,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:17:22,868 INFO L225 Difference]: With dead ends: 9334 [2021-11-20 23:17:22,868 INFO L226 Difference]: Without dead ends: 5667 [2021-11-20 23:17:22,870 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 974 GetRequests, 968 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:17:22,871 INFO L933 BasicCegarLoop]: 200 mSDtfsCounter, 209 mSDsluCounter, 434 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 55 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 634 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:17:22,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 634 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 452 Invalid, 1 Unknown, 0 Unchecked, 6.0s Time] [2021-11-20 23:17:22,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5667 states. [2021-11-20 23:17:23,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5667 to 4028. [2021-11-20 23:17:23,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4028 states, 4027 states have (on average 1.403029550533896) internal successors, (5650), 4027 states have internal predecessors, (5650), 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) [2021-11-20 23:17:23,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4028 states to 4028 states and 5650 transitions. [2021-11-20 23:17:23,033 INFO L78 Accepts]: Start accepts. Automaton has 4028 states and 5650 transitions. Word has length 487 [2021-11-20 23:17:23,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:17:23,033 INFO L470 AbstractCegarLoop]: Abstraction has 4028 states and 5650 transitions. [2021-11-20 23:17:23,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 31.5) internal successors, (189), 6 states have internal predecessors, (189), 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) [2021-11-20 23:17:23,033 INFO L276 IsEmpty]: Start isEmpty. Operand 4028 states and 5650 transitions. [2021-11-20 23:17:23,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2021-11-20 23:17:23,039 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:17:23,040 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 12, 11, 10, 10, 9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:17:23,053 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-20 23:17:23,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:17:23,240 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:17:23,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:17:23,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1033050067, now seen corresponding path program 1 times [2021-11-20 23:17:23,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:17:23,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [627071624] [2021-11-20 23:17:23,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:17:23,242 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:17:23,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:17:23,243 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:17:23,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-20 23:17:23,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:17:23,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 1039 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 23:17:23,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:17:23,899 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-20 23:17:23,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-20 23:17:24,145 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 23:17:24,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-20 23:17:24,959 INFO L134 CoverageAnalysis]: Checked inductivity of 2067 backedges. 1064 proven. 0 refuted. 0 times theorem prover too weak. 1003 trivial. 0 not checked. [2021-11-20 23:17:24,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:17:26,117 INFO L134 CoverageAnalysis]: Checked inductivity of 2067 backedges. 1064 proven. 0 refuted. 0 times theorem prover too weak. 1003 trivial. 0 not checked. [2021-11-20 23:17:26,117 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:17:26,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [627071624] [2021-11-20 23:17:26,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [627071624] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:17:26,117 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:17:26,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-20 23:17:26,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848553208] [2021-11-20 23:17:26,118 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:17:26,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 23:17:26,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:17:26,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 23:17:26,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:17:26,119 INFO L87 Difference]: Start difference. First operand 4028 states and 5650 transitions. Second operand has 6 states, 6 states have (on average 31.5) internal successors, (189), 6 states have internal predecessors, (189), 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) [2021-11-20 23:17:28,130 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:17:32,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:17:32,466 INFO L93 Difference]: Finished difference Result 9650 states and 13666 transitions. [2021-11-20 23:17:32,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:17:32,467 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 31.5) internal successors, (189), 6 states have internal predecessors, (189), 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 488 [2021-11-20 23:17:32,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:17:32,471 INFO L225 Difference]: With dead ends: 9650 [2021-11-20 23:17:32,471 INFO L226 Difference]: Without dead ends: 5643 [2021-11-20 23:17:32,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 976 GetRequests, 970 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:17:32,475 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 206 mSDsluCounter, 431 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 57 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 628 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:17:32,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 628 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 443 Invalid, 1 Unknown, 0 Unchecked, 6.0s Time] [2021-11-20 23:17:32,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5643 states. [2021-11-20 23:17:32,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5643 to 4041. [2021-11-20 23:17:32,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4041 states, 4040 states have (on average 1.3952970297029703) internal successors, (5637), 4040 states have internal predecessors, (5637), 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) [2021-11-20 23:17:32,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4041 states to 4041 states and 5637 transitions. [2021-11-20 23:17:32,648 INFO L78 Accepts]: Start accepts. Automaton has 4041 states and 5637 transitions. Word has length 488 [2021-11-20 23:17:32,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:17:32,649 INFO L470 AbstractCegarLoop]: Abstraction has 4041 states and 5637 transitions. [2021-11-20 23:17:32,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 31.5) internal successors, (189), 6 states have internal predecessors, (189), 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) [2021-11-20 23:17:32,649 INFO L276 IsEmpty]: Start isEmpty. Operand 4041 states and 5637 transitions. [2021-11-20 23:17:32,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2021-11-20 23:17:32,655 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:17:32,655 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 12, 12, 11, 10, 9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:17:32,669 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-20 23:17:32,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:17:32,856 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:17:32,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:17:32,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1885157089, now seen corresponding path program 1 times [2021-11-20 23:17:32,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:17:32,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1663468760] [2021-11-20 23:17:32,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:17:32,857 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:17:32,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:17:32,858 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:17:32,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-20 23:17:33,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:17:33,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 1044 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 23:17:33,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:17:33,499 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-20 23:17:33,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-20 23:17:33,763 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 23:17:33,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-20 23:17:34,605 INFO L134 CoverageAnalysis]: Checked inductivity of 2086 backedges. 1083 proven. 0 refuted. 0 times theorem prover too weak. 1003 trivial. 0 not checked. [2021-11-20 23:17:34,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:17:35,775 INFO L134 CoverageAnalysis]: Checked inductivity of 2086 backedges. 1083 proven. 0 refuted. 0 times theorem prover too weak. 1003 trivial. 0 not checked. [2021-11-20 23:17:35,775 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:17:35,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1663468760] [2021-11-20 23:17:35,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1663468760] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:17:35,776 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:17:35,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-20 23:17:35,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924719583] [2021-11-20 23:17:35,776 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:17:35,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 23:17:35,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:17:35,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 23:17:35,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:17:35,777 INFO L87 Difference]: Start difference. First operand 4041 states and 5637 transitions. Second operand has 6 states, 6 states have (on average 31.833333333333332) internal successors, (191), 6 states have internal predecessors, (191), 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) [2021-11-20 23:17:37,790 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:17:39,800 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:17:43,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:17:43,760 INFO L93 Difference]: Finished difference Result 9599 states and 13530 transitions. [2021-11-20 23:17:43,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:17:43,761 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 31.833333333333332) internal successors, (191), 6 states have internal predecessors, (191), 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 488 [2021-11-20 23:17:43,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:17:43,765 INFO L225 Difference]: With dead ends: 9599 [2021-11-20 23:17:43,765 INFO L226 Difference]: Without dead ends: 5579 [2021-11-20 23:17:43,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 976 GetRequests, 970 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:17:43,769 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 193 mSDsluCounter, 464 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 56 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 661 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2021-11-20 23:17:43,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 661 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 453 Invalid, 2 Unknown, 0 Unchecked, 7.7s Time] [2021-11-20 23:17:43,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5579 states. [2021-11-20 23:17:43,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5579 to 4068. [2021-11-20 23:17:43,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4068 states, 4067 states have (on average 1.392918613228424) internal successors, (5665), 4067 states have internal predecessors, (5665), 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) [2021-11-20 23:17:43,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4068 states to 4068 states and 5665 transitions. [2021-11-20 23:17:43,974 INFO L78 Accepts]: Start accepts. Automaton has 4068 states and 5665 transitions. Word has length 488 [2021-11-20 23:17:43,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:17:43,974 INFO L470 AbstractCegarLoop]: Abstraction has 4068 states and 5665 transitions. [2021-11-20 23:17:43,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 31.833333333333332) internal successors, (191), 6 states have internal predecessors, (191), 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) [2021-11-20 23:17:43,974 INFO L276 IsEmpty]: Start isEmpty. Operand 4068 states and 5665 transitions. [2021-11-20 23:17:43,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 491 [2021-11-20 23:17:43,980 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:17:43,981 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 12, 12, 11, 11, 10, 10, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:17:43,995 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-20 23:17:44,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:17:44,183 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:17:44,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:17:44,183 INFO L85 PathProgramCache]: Analyzing trace with hash -600881119, now seen corresponding path program 1 times [2021-11-20 23:17:44,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:17:44,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [206969193] [2021-11-20 23:17:44,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:17:44,185 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:17:44,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:17:44,185 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:17:44,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-20 23:17:44,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:17:44,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 1046 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 23:17:44,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:17:44,814 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-20 23:17:44,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-20 23:17:45,076 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 23:17:45,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-20 23:17:45,799 INFO L134 CoverageAnalysis]: Checked inductivity of 2113 backedges. 1110 proven. 0 refuted. 0 times theorem prover too weak. 1003 trivial. 0 not checked. [2021-11-20 23:17:45,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:17:46,860 INFO L134 CoverageAnalysis]: Checked inductivity of 2113 backedges. 1110 proven. 0 refuted. 0 times theorem prover too weak. 1003 trivial. 0 not checked. [2021-11-20 23:17:46,860 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:17:46,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [206969193] [2021-11-20 23:17:46,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [206969193] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:17:46,861 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:17:46,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-20 23:17:46,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47806251] [2021-11-20 23:17:46,862 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:17:46,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 23:17:46,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:17:46,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 23:17:46,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:17:46,864 INFO L87 Difference]: Start difference. First operand 4068 states and 5665 transitions. Second operand has 6 states, 6 states have (on average 32.666666666666664) internal successors, (196), 6 states have internal predecessors, (196), 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) [2021-11-20 23:17:48,901 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:17:50,912 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:17:56,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:17:56,167 INFO L93 Difference]: Finished difference Result 9976 states and 13952 transitions. [2021-11-20 23:17:56,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:17:56,168 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 32.666666666666664) internal successors, (196), 6 states have internal predecessors, (196), 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 490 [2021-11-20 23:17:56,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:17:56,172 INFO L225 Difference]: With dead ends: 9976 [2021-11-20 23:17:56,172 INFO L226 Difference]: Without dead ends: 5929 [2021-11-20 23:17:56,174 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 980 GetRequests, 974 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:17:56,175 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 185 mSDsluCounter, 660 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 54 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 857 SdHoareTripleChecker+Invalid, 644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:17:56,175 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 857 Invalid, 644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 588 Invalid, 2 Unknown, 0 Unchecked, 9.0s Time] [2021-11-20 23:17:56,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5929 states. [2021-11-20 23:17:56,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5929 to 4460. [2021-11-20 23:17:56,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4460 states, 4459 states have (on average 1.3776631531733572) internal successors, (6143), 4459 states have internal predecessors, (6143), 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) [2021-11-20 23:17:56,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4460 states to 4460 states and 6143 transitions. [2021-11-20 23:17:56,404 INFO L78 Accepts]: Start accepts. Automaton has 4460 states and 6143 transitions. Word has length 490 [2021-11-20 23:17:56,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:17:56,404 INFO L470 AbstractCegarLoop]: Abstraction has 4460 states and 6143 transitions. [2021-11-20 23:17:56,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 32.666666666666664) internal successors, (196), 6 states have internal predecessors, (196), 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) [2021-11-20 23:17:56,404 INFO L276 IsEmpty]: Start isEmpty. Operand 4460 states and 6143 transitions. [2021-11-20 23:17:56,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 492 [2021-11-20 23:17:56,409 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:17:56,409 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 12, 12, 11, 11, 10, 10, 9, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:17:56,425 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (26)] Ended with exit code 0 [2021-11-20 23:17:56,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:17:56,610 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:17:56,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:17:56,610 INFO L85 PathProgramCache]: Analyzing trace with hash 786725097, now seen corresponding path program 1 times [2021-11-20 23:17:56,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:17:56,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [224418707] [2021-11-20 23:17:56,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:17:56,612 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:17:56,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:17:56,612 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:17:56,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-20 23:17:56,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:17:57,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 1048 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 23:17:57,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:17:57,267 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-20 23:17:57,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-20 23:17:57,547 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 23:17:57,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-20 23:17:58,251 INFO L134 CoverageAnalysis]: Checked inductivity of 2121 backedges. 1118 proven. 0 refuted. 0 times theorem prover too weak. 1003 trivial. 0 not checked. [2021-11-20 23:17:58,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:17:59,317 INFO L134 CoverageAnalysis]: Checked inductivity of 2121 backedges. 1118 proven. 0 refuted. 0 times theorem prover too weak. 1003 trivial. 0 not checked. [2021-11-20 23:17:59,317 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:17:59,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [224418707] [2021-11-20 23:17:59,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [224418707] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:17:59,318 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:17:59,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-20 23:17:59,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508477540] [2021-11-20 23:17:59,318 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:17:59,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 23:17:59,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:17:59,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 23:17:59,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:17:59,319 INFO L87 Difference]: Start difference. First operand 4460 states and 6143 transitions. Second operand has 6 states, 6 states have (on average 33.0) internal successors, (198), 6 states have internal predecessors, (198), 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) [2021-11-20 23:18:01,332 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:18:03,342 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:18:08,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:18:08,704 INFO L93 Difference]: Finished difference Result 10314 states and 14332 transitions. [2021-11-20 23:18:08,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:18:08,705 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 33.0) internal successors, (198), 6 states have internal predecessors, (198), 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 491 [2021-11-20 23:18:08,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:18:08,711 INFO L225 Difference]: With dead ends: 10314 [2021-11-20 23:18:08,711 INFO L226 Difference]: Without dead ends: 5875 [2021-11-20 23:18:08,714 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 982 GetRequests, 976 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:18:08,715 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 173 mSDsluCounter, 647 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 56 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 838 SdHoareTripleChecker+Invalid, 614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:18:08,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 838 Invalid, 614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 556 Invalid, 2 Unknown, 0 Unchecked, 9.0s Time] [2021-11-20 23:18:08,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5875 states. [2021-11-20 23:18:09,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5875 to 4516. [2021-11-20 23:18:09,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4516 states, 4515 states have (on average 1.379623477297896) internal successors, (6229), 4515 states have internal predecessors, (6229), 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) [2021-11-20 23:18:09,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4516 states to 4516 states and 6229 transitions. [2021-11-20 23:18:09,025 INFO L78 Accepts]: Start accepts. Automaton has 4516 states and 6229 transitions. Word has length 491 [2021-11-20 23:18:09,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:18:09,025 INFO L470 AbstractCegarLoop]: Abstraction has 4516 states and 6229 transitions. [2021-11-20 23:18:09,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 33.0) internal successors, (198), 6 states have internal predecessors, (198), 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) [2021-11-20 23:18:09,026 INFO L276 IsEmpty]: Start isEmpty. Operand 4516 states and 6229 transitions. [2021-11-20 23:18:09,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 493 [2021-11-20 23:18:09,032 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:18:09,032 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 12, 12, 11, 11, 10, 10, 9, 9, 8, 8, 8, 7, 7, 7, 7, 7, 7, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:18:09,058 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-20 23:18:09,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:18:09,245 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:18:09,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:18:09,246 INFO L85 PathProgramCache]: Analyzing trace with hash -546502303, now seen corresponding path program 1 times [2021-11-20 23:18:09,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:18:09,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1558824174] [2021-11-20 23:18:09,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:18:09,247 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:18:09,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:18:09,248 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:18:09,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-20 23:18:09,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:18:09,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 1051 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 23:18:09,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:18:09,885 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-20 23:18:09,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-20 23:18:10,214 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 23:18:10,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-20 23:18:10,974 INFO L134 CoverageAnalysis]: Checked inductivity of 2127 backedges. 1124 proven. 0 refuted. 0 times theorem prover too weak. 1003 trivial. 0 not checked. [2021-11-20 23:18:10,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:18:12,130 INFO L134 CoverageAnalysis]: Checked inductivity of 2127 backedges. 1124 proven. 0 refuted. 0 times theorem prover too weak. 1003 trivial. 0 not checked. [2021-11-20 23:18:12,130 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:18:12,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1558824174] [2021-11-20 23:18:12,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1558824174] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:18:12,130 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:18:12,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-20 23:18:12,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519564427] [2021-11-20 23:18:12,131 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:18:12,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 23:18:12,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:18:12,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 23:18:12,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:18:12,133 INFO L87 Difference]: Start difference. First operand 4516 states and 6229 transitions. Second operand has 6 states, 6 states have (on average 33.333333333333336) internal successors, (200), 6 states have internal predecessors, (200), 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) [2021-11-20 23:18:14,164 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:18:19,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:18:19,347 INFO L93 Difference]: Finished difference Result 10776 states and 14896 transitions. [2021-11-20 23:18:19,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:18:19,348 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 33.333333333333336) internal successors, (200), 6 states have internal predecessors, (200), 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 492 [2021-11-20 23:18:19,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:18:19,354 INFO L225 Difference]: With dead ends: 10776 [2021-11-20 23:18:19,355 INFO L226 Difference]: Without dead ends: 6281 [2021-11-20 23:18:19,358 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 984 GetRequests, 978 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:18:19,358 INFO L933 BasicCegarLoop]: 190 mSDtfsCounter, 170 mSDsluCounter, 609 mSDsCounter, 0 mSdLazyCounter, 542 mSolverCounterSat, 50 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 799 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 542 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2021-11-20 23:18:19,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 799 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 542 Invalid, 1 Unknown, 0 Unchecked, 6.7s Time] [2021-11-20 23:18:19,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6281 states. [2021-11-20 23:18:19,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6281 to 4936. [2021-11-20 23:18:19,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4936 states, 4935 states have (on average 1.364741641337386) internal successors, (6735), 4935 states have internal predecessors, (6735), 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) [2021-11-20 23:18:19,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4936 states to 4936 states and 6735 transitions. [2021-11-20 23:18:19,635 INFO L78 Accepts]: Start accepts. Automaton has 4936 states and 6735 transitions. Word has length 492 [2021-11-20 23:18:19,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:18:19,636 INFO L470 AbstractCegarLoop]: Abstraction has 4936 states and 6735 transitions. [2021-11-20 23:18:19,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 33.333333333333336) internal successors, (200), 6 states have internal predecessors, (200), 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) [2021-11-20 23:18:19,636 INFO L276 IsEmpty]: Start isEmpty. Operand 4936 states and 6735 transitions. [2021-11-20 23:18:19,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2021-11-20 23:18:19,642 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:18:19,643 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 12, 12, 11, 11, 9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:18:19,667 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-20 23:18:19,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:18:19,861 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:18:19,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:18:19,862 INFO L85 PathProgramCache]: Analyzing trace with hash 64408660, now seen corresponding path program 1 times [2021-11-20 23:18:19,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:18:19,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1922906744] [2021-11-20 23:18:19,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:18:19,863 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:18:19,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:18:19,864 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:18:19,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-20 23:18:20,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:18:20,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 1052 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 23:18:20,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:18:20,534 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-20 23:18:20,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-20 23:18:20,789 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 23:18:20,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-20 23:18:21,562 INFO L134 CoverageAnalysis]: Checked inductivity of 2098 backedges. 1095 proven. 0 refuted. 0 times theorem prover too weak. 1003 trivial. 0 not checked. [2021-11-20 23:18:21,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:18:22,674 INFO L134 CoverageAnalysis]: Checked inductivity of 2098 backedges. 1095 proven. 0 refuted. 0 times theorem prover too weak. 1003 trivial. 0 not checked. [2021-11-20 23:18:22,674 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:18:22,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1922906744] [2021-11-20 23:18:22,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1922906744] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:18:22,674 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:18:22,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-20 23:18:22,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381073026] [2021-11-20 23:18:22,675 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:18:22,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 23:18:22,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:18:22,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 23:18:22,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:18:22,676 INFO L87 Difference]: Start difference. First operand 4936 states and 6735 transitions. Second operand has 6 states, 6 states have (on average 32.833333333333336) internal successors, (197), 6 states have internal predecessors, (197), 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) [2021-11-20 23:18:24,687 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:18:28,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:18:28,774 INFO L93 Difference]: Finished difference Result 11630 states and 15922 transitions. [2021-11-20 23:18:28,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:18:28,775 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 32.833333333333336) internal successors, (197), 6 states have internal predecessors, (197), 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 493 [2021-11-20 23:18:28,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:18:28,782 INFO L225 Difference]: With dead ends: 11630 [2021-11-20 23:18:28,782 INFO L226 Difference]: Without dead ends: 6715 [2021-11-20 23:18:28,785 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 986 GetRequests, 980 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:18:28,786 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 177 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 55 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 613 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2021-11-20 23:18:28,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 613 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 417 Invalid, 1 Unknown, 0 Unchecked, 5.7s Time] [2021-11-20 23:18:28,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6715 states. [2021-11-20 23:18:29,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6715 to 5300. [2021-11-20 23:18:29,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5300 states, 5299 states have (on average 1.3453481789016795) internal successors, (7129), 5299 states have internal predecessors, (7129), 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) [2021-11-20 23:18:29,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5300 states to 5300 states and 7129 transitions. [2021-11-20 23:18:29,051 INFO L78 Accepts]: Start accepts. Automaton has 5300 states and 7129 transitions. Word has length 493 [2021-11-20 23:18:29,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:18:29,052 INFO L470 AbstractCegarLoop]: Abstraction has 5300 states and 7129 transitions. [2021-11-20 23:18:29,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 32.833333333333336) internal successors, (197), 6 states have internal predecessors, (197), 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) [2021-11-20 23:18:29,052 INFO L276 IsEmpty]: Start isEmpty. Operand 5300 states and 7129 transitions. [2021-11-20 23:18:29,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2021-11-20 23:18:29,059 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:18:29,060 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 12, 12, 11, 11, 10, 10, 9, 9, 9, 8, 8, 7, 7, 7, 7, 7, 7, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:18:29,082 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-20 23:18:29,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:18:29,275 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:18:29,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:18:29,275 INFO L85 PathProgramCache]: Analyzing trace with hash -700094263, now seen corresponding path program 1 times [2021-11-20 23:18:29,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:18:29,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [296915571] [2021-11-20 23:18:29,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:18:29,277 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:18:29,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:18:29,278 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:18:29,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-20 23:18:29,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:18:29,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 1053 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 23:18:29,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:18:29,931 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-20 23:18:29,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-20 23:18:30,236 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 23:18:30,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-20 23:18:30,987 INFO L134 CoverageAnalysis]: Checked inductivity of 2135 backedges. 1132 proven. 0 refuted. 0 times theorem prover too weak. 1003 trivial. 0 not checked. [2021-11-20 23:18:30,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:18:32,127 INFO L134 CoverageAnalysis]: Checked inductivity of 2135 backedges. 1132 proven. 0 refuted. 0 times theorem prover too weak. 1003 trivial. 0 not checked. [2021-11-20 23:18:32,127 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:18:32,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [296915571] [2021-11-20 23:18:32,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [296915571] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:18:32,127 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:18:32,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-20 23:18:32,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389968411] [2021-11-20 23:18:32,128 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:18:32,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 23:18:32,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:18:32,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 23:18:32,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:18:32,129 INFO L87 Difference]: Start difference. First operand 5300 states and 7129 transitions. Second operand has 6 states, 6 states have (on average 33.666666666666664) internal successors, (202), 6 states have internal predecessors, (202), 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) [2021-11-20 23:18:34,139 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:18:38,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:18:38,963 INFO L93 Difference]: Finished difference Result 11914 states and 16168 transitions. [2021-11-20 23:18:38,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:18:38,969 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 33.666666666666664) internal successors, (202), 6 states have internal predecessors, (202), 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 493 [2021-11-20 23:18:38,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:18:38,976 INFO L225 Difference]: With dead ends: 11914 [2021-11-20 23:18:38,976 INFO L226 Difference]: Without dead ends: 6635 [2021-11-20 23:18:38,978 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 986 GetRequests, 980 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:18:38,979 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 165 mSDsluCounter, 611 mSDsCounter, 0 mSdLazyCounter, 539 mSolverCounterSat, 55 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 802 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 539 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2021-11-20 23:18:38,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 802 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 539 Invalid, 1 Unknown, 0 Unchecked, 6.5s Time] [2021-11-20 23:18:38,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6635 states. [2021-11-20 23:18:39,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6635 to 5328. [2021-11-20 23:18:39,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5328 states, 5327 states have (on average 1.3439083912145673) internal successors, (7159), 5327 states have internal predecessors, (7159), 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) [2021-11-20 23:18:39,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5328 states to 5328 states and 7159 transitions. [2021-11-20 23:18:39,249 INFO L78 Accepts]: Start accepts. Automaton has 5328 states and 7159 transitions. Word has length 493 [2021-11-20 23:18:39,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:18:39,250 INFO L470 AbstractCegarLoop]: Abstraction has 5328 states and 7159 transitions. [2021-11-20 23:18:39,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 33.666666666666664) internal successors, (202), 6 states have internal predecessors, (202), 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) [2021-11-20 23:18:39,250 INFO L276 IsEmpty]: Start isEmpty. Operand 5328 states and 7159 transitions. [2021-11-20 23:18:39,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 495 [2021-11-20 23:18:39,254 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:18:39,255 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 12, 12, 11, 11, 10, 9, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:18:39,268 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-20 23:18:39,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:18:39,455 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:18:39,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:18:39,456 INFO L85 PathProgramCache]: Analyzing trace with hash 2113538860, now seen corresponding path program 1 times [2021-11-20 23:18:39,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:18:39,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [380278844] [2021-11-20 23:18:39,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:18:39,457 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:18:39,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:18:39,458 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:18:39,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-20 23:18:39,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:18:39,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 1054 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 23:18:39,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:18:40,088 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-20 23:18:40,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-20 23:18:40,378 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 23:18:40,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-20 23:18:41,159 INFO L134 CoverageAnalysis]: Checked inductivity of 2107 backedges. 1104 proven. 0 refuted. 0 times theorem prover too weak. 1003 trivial. 0 not checked. [2021-11-20 23:18:41,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:18:42,329 INFO L134 CoverageAnalysis]: Checked inductivity of 2107 backedges. 1104 proven. 0 refuted. 0 times theorem prover too weak. 1003 trivial. 0 not checked. [2021-11-20 23:18:42,329 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:18:42,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [380278844] [2021-11-20 23:18:42,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [380278844] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:18:42,329 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:18:42,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-20 23:18:42,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865225700] [2021-11-20 23:18:42,330 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:18:42,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 23:18:42,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:18:42,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 23:18:42,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:18:42,331 INFO L87 Difference]: Start difference. First operand 5328 states and 7159 transitions. Second operand has 6 states, 6 states have (on average 33.166666666666664) internal successors, (199), 6 states have internal predecessors, (199), 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) [2021-11-20 23:18:44,341 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:18:47,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:18:47,881 INFO L93 Difference]: Finished difference Result 11918 states and 16136 transitions. [2021-11-20 23:18:47,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:18:47,888 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 33.166666666666664) internal successors, (199), 6 states have internal predecessors, (199), 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 494 [2021-11-20 23:18:47,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:18:47,892 INFO L225 Difference]: With dead ends: 11918 [2021-11-20 23:18:47,892 INFO L226 Difference]: Without dead ends: 6611 [2021-11-20 23:18:47,894 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 988 GetRequests, 982 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:18:47,895 INFO L933 BasicCegarLoop]: 234 mSDtfsCounter, 170 mSDsluCounter, 464 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 50 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 698 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:18:47,895 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 698 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 412 Invalid, 1 Unknown, 0 Unchecked, 5.1s Time] [2021-11-20 23:18:47,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6611 states. [2021-11-20 23:18:48,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6611 to 5328. [2021-11-20 23:18:48,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5328 states, 5327 states have (on average 1.3337713534822602) internal successors, (7105), 5327 states have internal predecessors, (7105), 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) [2021-11-20 23:18:48,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5328 states to 5328 states and 7105 transitions. [2021-11-20 23:18:48,133 INFO L78 Accepts]: Start accepts. Automaton has 5328 states and 7105 transitions. Word has length 494 [2021-11-20 23:18:48,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:18:48,133 INFO L470 AbstractCegarLoop]: Abstraction has 5328 states and 7105 transitions. [2021-11-20 23:18:48,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 33.166666666666664) internal successors, (199), 6 states have internal predecessors, (199), 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) [2021-11-20 23:18:48,133 INFO L276 IsEmpty]: Start isEmpty. Operand 5328 states and 7105 transitions. [2021-11-20 23:18:48,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 495 [2021-11-20 23:18:48,138 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:18:48,138 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 12, 12, 11, 11, 10, 10, 9, 9, 9, 9, 8, 7, 7, 7, 7, 7, 7, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:18:48,152 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-20 23:18:48,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:18:48,339 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:18:48,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:18:48,339 INFO L85 PathProgramCache]: Analyzing trace with hash -665139293, now seen corresponding path program 1 times [2021-11-20 23:18:48,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:18:48,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [373871051] [2021-11-20 23:18:48,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:18:48,340 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:18:48,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:18:48,341 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:18:48,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-20 23:18:48,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:18:48,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 1050 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 23:18:48,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:18:49,006 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-20 23:18:49,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-20 23:18:49,352 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 23:18:49,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-20 23:18:50,173 INFO L134 CoverageAnalysis]: Checked inductivity of 2143 backedges. 1140 proven. 0 refuted. 0 times theorem prover too weak. 1003 trivial. 0 not checked. [2021-11-20 23:18:50,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:18:51,316 INFO L134 CoverageAnalysis]: Checked inductivity of 2143 backedges. 1140 proven. 0 refuted. 0 times theorem prover too weak. 1003 trivial. 0 not checked. [2021-11-20 23:18:51,317 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:18:51,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [373871051] [2021-11-20 23:18:51,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [373871051] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:18:51,317 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:18:51,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-20 23:18:51,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253782226] [2021-11-20 23:18:51,317 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:18:51,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 23:18:51,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:18:51,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 23:18:51,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:18:51,318 INFO L87 Difference]: Start difference. First operand 5328 states and 7105 transitions. Second operand has 6 states, 6 states have (on average 34.0) internal successors, (204), 6 states have internal predecessors, (204), 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) [2021-11-20 23:18:53,329 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:18:57,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:18:57,712 INFO L93 Difference]: Finished difference Result 12274 states and 16428 transitions. [2021-11-20 23:18:57,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:18:57,716 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 34.0) internal successors, (204), 6 states have internal predecessors, (204), 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 494 [2021-11-20 23:18:57,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:18:57,721 INFO L225 Difference]: With dead ends: 12274 [2021-11-20 23:18:57,721 INFO L226 Difference]: Without dead ends: 6967 [2021-11-20 23:18:57,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 988 GetRequests, 982 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:18:57,723 INFO L933 BasicCegarLoop]: 206 mSDtfsCounter, 156 mSDsluCounter, 638 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 40 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 844 SdHoareTripleChecker+Invalid, 542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:18:57,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 844 Invalid, 542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 501 Invalid, 1 Unknown, 0 Unchecked, 6.0s Time] [2021-11-20 23:18:57,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6967 states. [2021-11-20 23:18:57,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6967 to 5776. [2021-11-20 23:18:57,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5776 states, 5775 states have (on average 1.317922077922078) internal successors, (7611), 5775 states have internal predecessors, (7611), 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) [2021-11-20 23:18:57,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5776 states to 5776 states and 7611 transitions. [2021-11-20 23:18:57,976 INFO L78 Accepts]: Start accepts. Automaton has 5776 states and 7611 transitions. Word has length 494 [2021-11-20 23:18:57,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:18:57,977 INFO L470 AbstractCegarLoop]: Abstraction has 5776 states and 7611 transitions. [2021-11-20 23:18:57,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 34.0) internal successors, (204), 6 states have internal predecessors, (204), 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) [2021-11-20 23:18:57,977 INFO L276 IsEmpty]: Start isEmpty. Operand 5776 states and 7611 transitions. [2021-11-20 23:18:57,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 499 [2021-11-20 23:18:57,981 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:18:57,982 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 12, 12, 11, 11, 10, 10, 9, 9, 9, 9, 9, 8, 8, 7, 7, 7, 7, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:18:57,995 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-11-20 23:18:58,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:18:58,187 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:18:58,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:18:58,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1861584174, now seen corresponding path program 1 times [2021-11-20 23:18:58,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:18:58,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [193072916] [2021-11-20 23:18:58,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:18:58,188 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:18:58,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:18:58,190 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:18:58,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-20 23:18:58,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:18:58,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 1061 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 23:18:58,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:18:59,752 INFO L134 CoverageAnalysis]: Checked inductivity of 2165 backedges. 1255 proven. 0 refuted. 0 times theorem prover too weak. 910 trivial. 0 not checked. [2021-11-20 23:18:59,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:19:00,904 INFO L134 CoverageAnalysis]: Checked inductivity of 2165 backedges. 1255 proven. 0 refuted. 0 times theorem prover too weak. 910 trivial. 0 not checked. [2021-11-20 23:19:00,904 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:19:00,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [193072916] [2021-11-20 23:19:00,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [193072916] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:19:00,905 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:19:00,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-20 23:19:00,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673979588] [2021-11-20 23:19:00,905 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:19:00,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:19:00,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:19:00,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:19:00,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:19:00,906 INFO L87 Difference]: Start difference. First operand 5776 states and 7611 transitions. Second operand has 4 states, 4 states have (on average 57.5) internal successors, (230), 4 states have internal predecessors, (230), 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) [2021-11-20 23:19:01,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:19:01,442 INFO L93 Difference]: Finished difference Result 11971 states and 15798 transitions. [2021-11-20 23:19:01,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:19:01,442 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 57.5) internal successors, (230), 4 states have internal predecessors, (230), 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 498 [2021-11-20 23:19:01,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:19:01,447 INFO L225 Difference]: With dead ends: 11971 [2021-11-20 23:19:01,447 INFO L226 Difference]: Without dead ends: 6616 [2021-11-20 23:19:01,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 994 GetRequests, 992 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:19:01,451 INFO L933 BasicCegarLoop]: 365 mSDtfsCounter, 327 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 725 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 23:19:01,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [327 Valid, 725 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 23:19:01,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6616 states. [2021-11-20 23:19:01,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6616 to 6616. [2021-11-20 23:19:01,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6616 states, 6615 states have (on average 1.3165532879818593) internal successors, (8709), 6615 states have internal predecessors, (8709), 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) [2021-11-20 23:19:01,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6616 states to 6616 states and 8709 transitions. [2021-11-20 23:19:01,787 INFO L78 Accepts]: Start accepts. Automaton has 6616 states and 8709 transitions. Word has length 498 [2021-11-20 23:19:01,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:19:01,787 INFO L470 AbstractCegarLoop]: Abstraction has 6616 states and 8709 transitions. [2021-11-20 23:19:01,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 57.5) internal successors, (230), 4 states have internal predecessors, (230), 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) [2021-11-20 23:19:01,787 INFO L276 IsEmpty]: Start isEmpty. Operand 6616 states and 8709 transitions. [2021-11-20 23:19:01,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 543 [2021-11-20 23:19:01,794 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:19:01,794 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 13, 13, 12, 12, 11, 11, 10, 10, 10, 10, 10, 9, 9, 8, 8, 8, 8, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:19:01,816 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-11-20 23:19:02,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:19:02,014 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:19:02,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:19:02,015 INFO L85 PathProgramCache]: Analyzing trace with hash -570304675, now seen corresponding path program 1 times [2021-11-20 23:19:02,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:19:02,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1268565184] [2021-11-20 23:19:02,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:19:02,016 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:19:02,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:19:02,017 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:19:02,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-20 23:19:02,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:19:02,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 1149 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 23:19:02,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:19:03,712 INFO L134 CoverageAnalysis]: Checked inductivity of 2576 backedges. 1311 proven. 0 refuted. 0 times theorem prover too weak. 1265 trivial. 0 not checked. [2021-11-20 23:19:03,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:19:04,975 INFO L134 CoverageAnalysis]: Checked inductivity of 2576 backedges. 1311 proven. 0 refuted. 0 times theorem prover too weak. 1265 trivial. 0 not checked. [2021-11-20 23:19:04,975 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:19:04,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1268565184] [2021-11-20 23:19:04,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1268565184] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:19:04,976 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:19:04,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-20 23:19:04,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934954757] [2021-11-20 23:19:04,976 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:19:04,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:19:04,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:19:04,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:19:04,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:19:04,978 INFO L87 Difference]: Start difference. First operand 6616 states and 8709 transitions. Second operand has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 states have internal predecessors, (181), 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) [2021-11-20 23:19:05,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:19:05,459 INFO L93 Difference]: Finished difference Result 13233 states and 17435 transitions. [2021-11-20 23:19:05,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:19:05,459 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 states have internal predecessors, (181), 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 542 [2021-11-20 23:19:05,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:19:05,467 INFO L225 Difference]: With dead ends: 13233 [2021-11-20 23:19:05,467 INFO L226 Difference]: Without dead ends: 7038 [2021-11-20 23:19:05,471 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1082 GetRequests, 1081 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:19:05,472 INFO L933 BasicCegarLoop]: 407 mSDtfsCounter, 163 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:19:05,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 596 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 23:19:05,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7038 states. [2021-11-20 23:19:05,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7038 to 7038. [2021-11-20 23:19:05,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7038 states, 7037 states have (on average 1.3153332385959926) internal successors, (9256), 7037 states have internal predecessors, (9256), 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) [2021-11-20 23:19:05,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7038 states to 7038 states and 9256 transitions. [2021-11-20 23:19:05,802 INFO L78 Accepts]: Start accepts. Automaton has 7038 states and 9256 transitions. Word has length 542 [2021-11-20 23:19:05,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:19:05,803 INFO L470 AbstractCegarLoop]: Abstraction has 7038 states and 9256 transitions. [2021-11-20 23:19:05,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 states have internal predecessors, (181), 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) [2021-11-20 23:19:05,803 INFO L276 IsEmpty]: Start isEmpty. Operand 7038 states and 9256 transitions. [2021-11-20 23:19:05,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 578 [2021-11-20 23:19:05,830 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:19:05,830 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 14, 14, 13, 13, 12, 12, 11, 11, 11, 11, 11, 10, 10, 9, 9, 8, 8, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:19:05,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-11-20 23:19:06,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:19:06,031 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:19:06,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:19:06,031 INFO L85 PathProgramCache]: Analyzing trace with hash 2071014403, now seen corresponding path program 1 times [2021-11-20 23:19:06,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:19:06,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1319720026] [2021-11-20 23:19:06,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:19:06,033 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:19:06,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:19:06,033 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:19:06,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-11-20 23:19:06,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:19:06,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 1220 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 23:19:06,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:19:07,669 INFO L134 CoverageAnalysis]: Checked inductivity of 2981 backedges. 1704 proven. 0 refuted. 0 times theorem prover too weak. 1277 trivial. 0 not checked. [2021-11-20 23:19:07,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:19:08,920 INFO L134 CoverageAnalysis]: Checked inductivity of 2981 backedges. 1704 proven. 0 refuted. 0 times theorem prover too weak. 1277 trivial. 0 not checked. [2021-11-20 23:19:08,920 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:19:08,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1319720026] [2021-11-20 23:19:08,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1319720026] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:19:08,921 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:19:08,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-20 23:19:08,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519071048] [2021-11-20 23:19:08,921 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:19:08,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:19:08,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:19:08,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:19:08,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:19:08,923 INFO L87 Difference]: Start difference. First operand 7038 states and 9256 transitions. Second operand has 4 states, 4 states have (on average 60.75) internal successors, (243), 4 states have internal predecessors, (243), 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) [2021-11-20 23:19:09,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:19:09,565 INFO L93 Difference]: Finished difference Result 14489 states and 19078 transitions. [2021-11-20 23:19:09,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:19:09,565 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 60.75) internal successors, (243), 4 states have internal predecessors, (243), 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 577 [2021-11-20 23:19:09,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:19:09,570 INFO L225 Difference]: With dead ends: 14489 [2021-11-20 23:19:09,571 INFO L226 Difference]: Without dead ends: 7872 [2021-11-20 23:19:09,574 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1152 GetRequests, 1150 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:19:09,574 INFO L933 BasicCegarLoop]: 362 mSDtfsCounter, 314 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 726 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 23:19:09,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [314 Valid, 726 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 23:19:09,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7872 states. [2021-11-20 23:19:09,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7872 to 7872. [2021-11-20 23:19:09,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7872 states, 7871 states have (on average 1.3143183839410495) internal successors, (10345), 7871 states have internal predecessors, (10345), 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) [2021-11-20 23:19:09,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7872 states to 7872 states and 10345 transitions. [2021-11-20 23:19:09,945 INFO L78 Accepts]: Start accepts. Automaton has 7872 states and 10345 transitions. Word has length 577 [2021-11-20 23:19:09,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:19:09,945 INFO L470 AbstractCegarLoop]: Abstraction has 7872 states and 10345 transitions. [2021-11-20 23:19:09,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 60.75) internal successors, (243), 4 states have internal predecessors, (243), 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) [2021-11-20 23:19:09,946 INFO L276 IsEmpty]: Start isEmpty. Operand 7872 states and 10345 transitions. [2021-11-20 23:19:09,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 659 [2021-11-20 23:19:09,956 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:19:09,957 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 16, 16, 15, 15, 14, 14, 13, 13, 13, 13, 13, 12, 12, 11, 11, 10, 10, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:19:09,978 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2021-11-20 23:19:10,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:19:10,178 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:19:10,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:19:10,178 INFO L85 PathProgramCache]: Analyzing trace with hash -1815444421, now seen corresponding path program 1 times [2021-11-20 23:19:10,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:19:10,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2020527087] [2021-11-20 23:19:10,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:19:10,181 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:19:10,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:19:10,182 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:19:10,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-11-20 23:19:10,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:19:10,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 1381 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 23:19:10,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:19:12,182 INFO L134 CoverageAnalysis]: Checked inductivity of 3955 backedges. 2235 proven. 0 refuted. 0 times theorem prover too weak. 1720 trivial. 0 not checked. [2021-11-20 23:19:12,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:19:13,587 INFO L134 CoverageAnalysis]: Checked inductivity of 3955 backedges. 2235 proven. 0 refuted. 0 times theorem prover too weak. 1720 trivial. 0 not checked. [2021-11-20 23:19:13,587 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:19:13,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2020527087] [2021-11-20 23:19:13,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2020527087] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:19:13,588 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:19:13,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-20 23:19:13,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476527347] [2021-11-20 23:19:13,588 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:19:13,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:19:13,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:19:13,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:19:13,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:19:13,589 INFO L87 Difference]: Start difference. First operand 7872 states and 10345 transitions. Second operand has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 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) [2021-11-20 23:19:14,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:19:14,087 INFO L93 Difference]: Finished difference Result 15741 states and 20701 transitions. [2021-11-20 23:19:14,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:19:14,088 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 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 658 [2021-11-20 23:19:14,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:19:14,093 INFO L225 Difference]: With dead ends: 15741 [2021-11-20 23:19:14,093 INFO L226 Difference]: Without dead ends: 8290 [2021-11-20 23:19:14,098 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1314 GetRequests, 1313 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:19:14,099 INFO L933 BasicCegarLoop]: 406 mSDtfsCounter, 150 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:19:14,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 595 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 23:19:14,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8290 states. [2021-11-20 23:19:14,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8290 to 8290. [2021-11-20 23:19:14,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8290 states, 8289 states have (on average 1.3135480757630595) internal successors, (10888), 8289 states have internal predecessors, (10888), 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) [2021-11-20 23:19:14,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8290 states to 8290 states and 10888 transitions. [2021-11-20 23:19:14,471 INFO L78 Accepts]: Start accepts. Automaton has 8290 states and 10888 transitions. Word has length 658 [2021-11-20 23:19:14,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:19:14,472 INFO L470 AbstractCegarLoop]: Abstraction has 8290 states and 10888 transitions. [2021-11-20 23:19:14,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 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) [2021-11-20 23:19:14,472 INFO L276 IsEmpty]: Start isEmpty. Operand 8290 states and 10888 transitions. [2021-11-20 23:19:14,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 700 [2021-11-20 23:19:14,480 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:19:14,480 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 18, 18, 18, 18, 18, 18, 17, 17, 16, 16, 15, 15, 14, 14, 14, 14, 14, 13, 13, 12, 12, 11, 11, 7, 7, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:19:14,495 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2021-11-20 23:19:14,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:19:14,681 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:19:14,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:19:14,681 INFO L85 PathProgramCache]: Analyzing trace with hash 521769738, now seen corresponding path program 1 times [2021-11-20 23:19:14,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:19:14,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2750720] [2021-11-20 23:19:14,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:19:14,683 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:19:14,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:19:14,683 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:19:14,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-11-20 23:19:15,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:19:15,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 1464 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 23:19:15,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:19:16,626 INFO L134 CoverageAnalysis]: Checked inductivity of 4503 backedges. 2570 proven. 0 refuted. 0 times theorem prover too weak. 1933 trivial. 0 not checked. [2021-11-20 23:19:16,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:19:18,038 INFO L134 CoverageAnalysis]: Checked inductivity of 4503 backedges. 2570 proven. 0 refuted. 0 times theorem prover too weak. 1933 trivial. 0 not checked. [2021-11-20 23:19:18,038 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:19:18,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2750720] [2021-11-20 23:19:18,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2750720] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:19:18,039 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:19:18,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-20 23:19:18,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779074325] [2021-11-20 23:19:18,040 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:19:18,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:19:18,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:19:18,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:19:18,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:19:18,041 INFO L87 Difference]: Start difference. First operand 8290 states and 10888 transitions. Second operand has 4 states, 4 states have (on average 64.75) internal successors, (259), 4 states have internal predecessors, (259), 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) [2021-11-20 23:19:18,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:19:18,714 INFO L93 Difference]: Finished difference Result 16995 states and 22344 transitions. [2021-11-20 23:19:18,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:19:18,715 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 64.75) internal successors, (259), 4 states have internal predecessors, (259), 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 699 [2021-11-20 23:19:18,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:19:18,721 INFO L225 Difference]: With dead ends: 16995 [2021-11-20 23:19:18,722 INFO L226 Difference]: Without dead ends: 9126 [2021-11-20 23:19:18,724 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1396 GetRequests, 1394 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:19:18,725 INFO L933 BasicCegarLoop]: 362 mSDtfsCounter, 315 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 728 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 23:19:18,725 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [315 Valid, 728 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 23:19:18,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9126 states. [2021-11-20 23:19:19,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9126 to 9126. [2021-11-20 23:19:19,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9126 states, 9125 states have (on average 1.3126575342465754) internal successors, (11978), 9125 states have internal predecessors, (11978), 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) [2021-11-20 23:19:19,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9126 states to 9126 states and 11978 transitions. [2021-11-20 23:19:19,144 INFO L78 Accepts]: Start accepts. Automaton has 9126 states and 11978 transitions. Word has length 699 [2021-11-20 23:19:19,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:19:19,145 INFO L470 AbstractCegarLoop]: Abstraction has 9126 states and 11978 transitions. [2021-11-20 23:19:19,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 64.75) internal successors, (259), 4 states have internal predecessors, (259), 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) [2021-11-20 23:19:19,145 INFO L276 IsEmpty]: Start isEmpty. Operand 9126 states and 11978 transitions. [2021-11-20 23:19:19,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 783 [2021-11-20 23:19:19,154 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:19:19,154 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 20, 20, 20, 20, 20, 20, 19, 19, 18, 18, 17, 17, 16, 16, 16, 16, 16, 15, 15, 14, 14, 13, 13, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:19:19,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2021-11-20 23:19:19,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:19:19,363 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:19:19,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:19:19,363 INFO L85 PathProgramCache]: Analyzing trace with hash -327285897, now seen corresponding path program 1 times [2021-11-20 23:19:19,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:19:19,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1990209115] [2021-11-20 23:19:19,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:19:19,365 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:19:19,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:19:19,365 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:19:19,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-11-20 23:19:20,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:19:20,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 1630 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-20 23:19:20,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:19:20,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-20 23:19:20,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-20 23:19:20,909 INFO L354 Elim1Store]: treesize reduction 96, result has 16.5 percent of original size [2021-11-20 23:19:20,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 53 treesize of output 41 [2021-11-20 23:19:20,935 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-11-20 23:19:20,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-11-20 23:19:20,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:19:20,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:19:20,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:19:20,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 22 [2021-11-20 23:19:21,060 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-11-20 23:19:21,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-11-20 23:19:21,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:19:21,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-11-20 23:19:21,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-11-20 23:19:21,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2021-11-20 23:19:23,214 INFO L134 CoverageAnalysis]: Checked inductivity of 5702 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5702 trivial. 0 not checked. [2021-11-20 23:19:23,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:19:25,555 INFO L134 CoverageAnalysis]: Checked inductivity of 5702 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5702 trivial. 0 not checked. [2021-11-20 23:19:25,555 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:19:25,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1990209115] [2021-11-20 23:19:25,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1990209115] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:19:25,556 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:19:25,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-20 23:19:25,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285128231] [2021-11-20 23:19:25,557 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:19:25,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 23:19:25,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:19:25,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 23:19:25,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:19:25,559 INFO L87 Difference]: Start difference. First operand 9126 states and 11978 transitions. Second operand has 8 states, 8 states have (on average 17.625) internal successors, (141), 8 states have internal predecessors, (141), 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) [2021-11-20 23:19:27,583 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:19:29,590 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:19:31,607 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:19:35,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:19:35,139 INFO L93 Difference]: Finished difference Result 18249 states and 23952 transitions. [2021-11-20 23:19:35,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:19:35,145 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 17.625) internal successors, (141), 8 states have internal predecessors, (141), 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 782 [2021-11-20 23:19:35,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:19:35,152 INFO L225 Difference]: With dead ends: 18249 [2021-11-20 23:19:35,152 INFO L226 Difference]: Without dead ends: 9126 [2021-11-20 23:19:35,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1564 GetRequests, 1555 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-20 23:19:35,156 INFO L933 BasicCegarLoop]: 230 mSDtfsCounter, 7 mSDsluCounter, 845 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 1075 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 9.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:19:35,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 1075 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 266 Invalid, 3 Unknown, 59 Unchecked, 9.0s Time] [2021-11-20 23:19:35,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9126 states. [2021-11-20 23:19:35,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9126 to 9126. [2021-11-20 23:19:35,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9126 states, 9125 states have (on average 1.3125479452054793) internal successors, (11977), 9125 states have internal predecessors, (11977), 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) [2021-11-20 23:19:35,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9126 states to 9126 states and 11977 transitions. [2021-11-20 23:19:35,601 INFO L78 Accepts]: Start accepts. Automaton has 9126 states and 11977 transitions. Word has length 782 [2021-11-20 23:19:35,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:19:35,601 INFO L470 AbstractCegarLoop]: Abstraction has 9126 states and 11977 transitions. [2021-11-20 23:19:35,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.625) internal successors, (141), 8 states have internal predecessors, (141), 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) [2021-11-20 23:19:35,602 INFO L276 IsEmpty]: Start isEmpty. Operand 9126 states and 11977 transitions. [2021-11-20 23:19:35,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 783 [2021-11-20 23:19:35,610 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:19:35,611 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 20, 20, 20, 20, 20, 20, 19, 19, 18, 18, 17, 17, 16, 16, 16, 16, 16, 15, 15, 14, 14, 13, 13, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:19:35,632 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2021-11-20 23:19:35,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:19:35,812 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:19:35,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:19:35,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1805251019, now seen corresponding path program 1 times [2021-11-20 23:19:35,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:19:35,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1341730841] [2021-11-20 23:19:35,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:19:35,814 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:19:35,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:19:35,815 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:19:35,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2021-11-20 23:19:37,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:19:37,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 1636 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 23:19:37,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:19:37,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-20 23:19:37,713 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-20 23:19:37,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-11-20 23:19:38,254 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 23:19:38,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-20 23:19:39,417 INFO L134 CoverageAnalysis]: Checked inductivity of 5702 backedges. 2985 proven. 0 refuted. 0 times theorem prover too weak. 2717 trivial. 0 not checked. [2021-11-20 23:19:39,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:19:41,396 INFO L134 CoverageAnalysis]: Checked inductivity of 5702 backedges. 2985 proven. 0 refuted. 0 times theorem prover too weak. 2717 trivial. 0 not checked. [2021-11-20 23:19:41,396 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:19:41,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1341730841] [2021-11-20 23:19:41,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1341730841] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:19:41,397 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:19:41,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-20 23:19:41,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052960259] [2021-11-20 23:19:41,397 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:19:41,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 23:19:41,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:19:41,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 23:19:41,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-20 23:19:41,399 INFO L87 Difference]: Start difference. First operand 9126 states and 11977 transitions. Second operand has 7 states, 7 states have (on average 35.142857142857146) internal successors, (246), 7 states have internal predecessors, (246), 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) [2021-11-20 23:19:43,410 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:19:49,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:19:49,925 INFO L93 Difference]: Finished difference Result 23549 states and 30975 transitions. [2021-11-20 23:19:49,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 23:19:49,927 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 35.142857142857146) internal successors, (246), 7 states have internal predecessors, (246), 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 782 [2021-11-20 23:19:49,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:19:49,937 INFO L225 Difference]: With dead ends: 23549 [2021-11-20 23:19:49,937 INFO L226 Difference]: Without dead ends: 14444 [2021-11-20 23:19:49,940 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1565 GetRequests, 1556 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-11-20 23:19:49,940 INFO L933 BasicCegarLoop]: 231 mSDtfsCounter, 302 mSDsluCounter, 849 mSDsCounter, 0 mSdLazyCounter, 710 mSolverCounterSat, 51 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 1080 SdHoareTripleChecker+Invalid, 762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 710 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2021-11-20 23:19:49,941 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [302 Valid, 1080 Invalid, 762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 710 Invalid, 1 Unknown, 0 Unchecked, 7.6s Time] [2021-11-20 23:19:49,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14444 states. [2021-11-20 23:19:50,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14444 to 10068. [2021-11-20 23:19:50,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10068 states, 10067 states have (on average 1.3138968908314295) internal successors, (13227), 10067 states have internal predecessors, (13227), 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) [2021-11-20 23:19:50,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10068 states to 10068 states and 13227 transitions. [2021-11-20 23:19:50,425 INFO L78 Accepts]: Start accepts. Automaton has 10068 states and 13227 transitions. Word has length 782 [2021-11-20 23:19:50,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:19:50,425 INFO L470 AbstractCegarLoop]: Abstraction has 10068 states and 13227 transitions. [2021-11-20 23:19:50,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 35.142857142857146) internal successors, (246), 7 states have internal predecessors, (246), 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) [2021-11-20 23:19:50,426 INFO L276 IsEmpty]: Start isEmpty. Operand 10068 states and 13227 transitions. [2021-11-20 23:19:50,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 783 [2021-11-20 23:19:50,435 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:19:50,435 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 20, 20, 20, 20, 20, 20, 19, 19, 18, 18, 17, 17, 16, 16, 16, 16, 16, 15, 15, 14, 14, 13, 13, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:19:50,458 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2021-11-20 23:19:50,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:19:50,636 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:19:50,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:19:50,636 INFO L85 PathProgramCache]: Analyzing trace with hash 267707701, now seen corresponding path program 1 times [2021-11-20 23:19:50,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:19:50,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1429311885] [2021-11-20 23:19:50,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:19:50,638 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:19:50,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:19:50,639 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:19:50,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2021-11-20 23:19:55,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:19:55,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 1636 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 23:19:55,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:19:57,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-20 23:19:57,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 29 [2021-11-20 23:19:57,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-11-20 23:19:57,225 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-20 23:19:57,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 32 [2021-11-20 23:19:57,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:19:57,399 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-20 23:19:57,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 54 [2021-11-20 23:19:58,478 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 23:19:58,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 10 [2021-11-20 23:19:59,601 INFO L134 CoverageAnalysis]: Checked inductivity of 5702 backedges. 3210 proven. 3 refuted. 0 times theorem prover too weak. 2489 trivial. 0 not checked. [2021-11-20 23:19:59,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:20:00,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 26 [2021-11-20 23:20:01,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-11-20 23:20:03,014 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_arrayElimCell_65 (_ BitVec 32)) (v_arrayElimCell_66 (_ BitVec 32))) (not (= (select (select (store |c_#memory_int| v_arrayElimCell_65 (store (select |c_#memory_int| v_arrayElimCell_65) (bvadd v_arrayElimCell_66 (_ bv844 32)) (_ bv3 32))) |c_ULTIMATE.start_ssl3_accept_~s#1.base|) (bvadd |c_ULTIMATE.start_ssl3_accept_~s#1.offset| (_ bv52 32))) (_ bv8640 32)))) is different from false [2021-11-20 23:20:03,425 INFO L134 CoverageAnalysis]: Checked inductivity of 5702 backedges. 3213 proven. 0 refuted. 0 times theorem prover too weak. 2489 trivial. 0 not checked. [2021-11-20 23:20:03,425 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:20:03,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1429311885] [2021-11-20 23:20:03,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1429311885] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 23:20:03,426 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 23:20:03,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2021-11-20 23:20:03,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048818965] [2021-11-20 23:20:03,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:20:03,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 23:20:03,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:20:03,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 23:20:03,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=114, Unknown=1, NotChecked=22, Total=182 [2021-11-20 23:20:03,427 INFO L87 Difference]: Start difference. First operand 10068 states and 13227 transitions. Second operand has 6 states, 6 states have (on average 36.666666666666664) internal successors, (220), 6 states have internal predecessors, (220), 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) [2021-11-20 23:20:05,441 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:20:07,449 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:20:10,247 WARN L838 $PredicateComparison]: unable to prove that (and (not (= (select (select |c_#memory_int| |c_ULTIMATE.start_ssl3_accept_~s#1.base|) (bvadd |c_ULTIMATE.start_ssl3_accept_~s#1.offset| (_ bv52 32))) (_ bv8640 32))) (forall ((v_arrayElimCell_65 (_ BitVec 32)) (v_arrayElimCell_66 (_ BitVec 32))) (not (= (select (select (store |c_#memory_int| v_arrayElimCell_65 (store (select |c_#memory_int| v_arrayElimCell_65) (bvadd v_arrayElimCell_66 (_ bv844 32)) (_ bv3 32))) |c_ULTIMATE.start_ssl3_accept_~s#1.base|) (bvadd |c_ULTIMATE.start_ssl3_accept_~s#1.offset| (_ bv52 32))) (_ bv8640 32))))) is different from false [2021-11-20 23:20:12,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:20:12,192 INFO L93 Difference]: Finished difference Result 23338 states and 30796 transitions. [2021-11-20 23:20:12,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 23:20:12,197 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 36.666666666666664) internal successors, (220), 6 states have internal predecessors, (220), 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 782 [2021-11-20 23:20:12,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:20:12,207 INFO L225 Difference]: With dead ends: 23338 [2021-11-20 23:20:12,208 INFO L226 Difference]: Without dead ends: 13291 [2021-11-20 23:20:12,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1564 GetRequests, 1549 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=52, Invalid=136, Unknown=2, NotChecked=50, Total=240 [2021-11-20 23:20:12,213 INFO L933 BasicCegarLoop]: 178 mSDtfsCounter, 156 mSDsluCounter, 553 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 46 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 731 SdHoareTripleChecker+Invalid, 641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 282 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:20:12,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 731 Invalid, 641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 311 Invalid, 2 Unknown, 282 Unchecked, 6.1s Time] [2021-11-20 23:20:12,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13291 states. [2021-11-20 23:20:12,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13291 to 11642. [2021-11-20 23:20:12,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11642 states, 11641 states have (on average 1.312430203590757) internal successors, (15278), 11641 states have internal predecessors, (15278), 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) [2021-11-20 23:20:12,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11642 states to 11642 states and 15278 transitions. [2021-11-20 23:20:12,722 INFO L78 Accepts]: Start accepts. Automaton has 11642 states and 15278 transitions. Word has length 782 [2021-11-20 23:20:12,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:20:12,723 INFO L470 AbstractCegarLoop]: Abstraction has 11642 states and 15278 transitions. [2021-11-20 23:20:12,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 36.666666666666664) internal successors, (220), 6 states have internal predecessors, (220), 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) [2021-11-20 23:20:12,723 INFO L276 IsEmpty]: Start isEmpty. Operand 11642 states and 15278 transitions. [2021-11-20 23:20:12,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 783 [2021-11-20 23:20:12,733 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:20:12,733 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 20, 20, 20, 20, 20, 20, 19, 19, 18, 18, 17, 17, 16, 16, 16, 16, 16, 15, 15, 14, 14, 13, 13, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:20:12,763 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2021-11-20 23:20:12,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:20:12,934 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:20:12,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:20:12,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1913445429, now seen corresponding path program 1 times [2021-11-20 23:20:12,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:20:12,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1655101007] [2021-11-20 23:20:12,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:20:12,937 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:20:12,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:20:12,937 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:20:12,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2021-11-20 23:20:16,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:20:16,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 1636 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-20 23:20:16,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:20:17,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-20 23:20:17,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 39 [2021-11-20 23:20:17,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2021-11-20 23:20:17,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:20:17,963 INFO L354 Elim1Store]: treesize reduction 48, result has 44.8 percent of original size [2021-11-20 23:20:17,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 55 [2021-11-20 23:20:18,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:20:18,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:20:18,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:20:18,374 INFO L354 Elim1Store]: treesize reduction 57, result has 25.0 percent of original size [2021-11-20 23:20:18,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 52 treesize of output 67 [2021-11-20 23:20:19,680 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 23:20:19,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 14 [2021-11-20 23:20:20,681 INFO L134 CoverageAnalysis]: Checked inductivity of 5702 backedges. 3225 proven. 1 refuted. 0 times theorem prover too weak. 2476 trivial. 0 not checked. [2021-11-20 23:20:20,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:20:22,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 52 [2021-11-20 23:20:22,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 40 [2021-11-20 23:20:24,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 92 [2021-11-20 23:20:24,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 35 [2021-11-20 23:20:25,002 INFO L134 CoverageAnalysis]: Checked inductivity of 5702 backedges. 3226 proven. 0 refuted. 0 times theorem prover too weak. 2476 trivial. 0 not checked. [2021-11-20 23:20:25,002 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:20:25,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1655101007] [2021-11-20 23:20:25,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1655101007] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 23:20:25,003 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 23:20:25,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 14 [2021-11-20 23:20:25,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072638211] [2021-11-20 23:20:25,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:20:25,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 23:20:25,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:20:25,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 23:20:25,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-11-20 23:20:25,005 INFO L87 Difference]: Start difference. First operand 11642 states and 15278 transitions. Second operand has 7 states, 7 states have (on average 32.0) internal successors, (224), 7 states have internal predecessors, (224), 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) [2021-11-20 23:20:27,018 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:20:29,028 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:20:36,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:20:36,687 INFO L93 Difference]: Finished difference Result 32877 states and 43168 transitions. [2021-11-20 23:20:36,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 23:20:36,693 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 32.0) internal successors, (224), 7 states have internal predecessors, (224), 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 782 [2021-11-20 23:20:36,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:20:36,714 INFO L225 Difference]: With dead ends: 32877 [2021-11-20 23:20:36,714 INFO L226 Difference]: Without dead ends: 21256 [2021-11-20 23:20:36,719 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1565 GetRequests, 1549 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-11-20 23:20:36,720 INFO L933 BasicCegarLoop]: 354 mSDtfsCounter, 468 mSDsluCounter, 770 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 93 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 468 SdHoareTripleChecker+Valid, 1124 SdHoareTripleChecker+Invalid, 675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 99 IncrementalHoareTripleChecker+Unchecked, 8.5s IncrementalHoareTripleChecker+Time [2021-11-20 23:20:36,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [468 Valid, 1124 Invalid, 675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 481 Invalid, 2 Unknown, 99 Unchecked, 8.5s Time] [2021-11-20 23:20:36,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21256 states. [2021-11-20 23:20:37,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21256 to 20709. [2021-11-20 23:20:37,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20709 states, 20708 states have (on average 1.3123913463395789) internal successors, (27177), 20708 states have internal predecessors, (27177), 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) [2021-11-20 23:20:37,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20709 states to 20709 states and 27177 transitions. [2021-11-20 23:20:37,613 INFO L78 Accepts]: Start accepts. Automaton has 20709 states and 27177 transitions. Word has length 782 [2021-11-20 23:20:37,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:20:37,613 INFO L470 AbstractCegarLoop]: Abstraction has 20709 states and 27177 transitions. [2021-11-20 23:20:37,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 32.0) internal successors, (224), 7 states have internal predecessors, (224), 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) [2021-11-20 23:20:37,614 INFO L276 IsEmpty]: Start isEmpty. Operand 20709 states and 27177 transitions. [2021-11-20 23:20:37,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 786 [2021-11-20 23:20:37,630 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:20:37,630 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 20, 20, 20, 20, 20, 20, 19, 19, 18, 18, 17, 17, 16, 16, 16, 16, 16, 15, 15, 14, 14, 13, 13, 11, 8, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:20:37,656 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2021-11-20 23:20:37,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:20:37,831 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:20:37,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:20:37,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1300589460, now seen corresponding path program 1 times [2021-11-20 23:20:37,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:20:37,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1820322615] [2021-11-20 23:20:37,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:20:37,833 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:20:37,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:20:37,834 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:20:37,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2021-11-20 23:20:41,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:20:41,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 1642 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 23:20:41,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:20:43,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-20 23:20:43,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 29 [2021-11-20 23:20:43,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-11-20 23:20:43,806 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-20 23:20:43,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 32 [2021-11-20 23:20:43,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:20:43,958 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-20 23:20:43,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 54 [2021-11-20 23:20:44,872 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 23:20:44,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 10 [2021-11-20 23:20:45,904 INFO L134 CoverageAnalysis]: Checked inductivity of 5729 backedges. 3225 proven. 2 refuted. 0 times theorem prover too weak. 2502 trivial. 0 not checked. [2021-11-20 23:20:45,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:20:47,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 26 [2021-11-20 23:20:47,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-11-20 23:20:49,396 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_arrayElimCell_89 (_ BitVec 32)) (v_arrayElimCell_88 (_ BitVec 32))) (not (= (_ bv8641 32) (select (select (store |c_#memory_int| v_arrayElimCell_88 (store (select |c_#memory_int| v_arrayElimCell_88) (bvadd v_arrayElimCell_89 (_ bv844 32)) (_ bv3 32))) |c_ULTIMATE.start_ssl3_accept_~s#1.base|) (bvadd |c_ULTIMATE.start_ssl3_accept_~s#1.offset| (_ bv52 32)))))) is different from false [2021-11-20 23:20:49,815 INFO L134 CoverageAnalysis]: Checked inductivity of 5729 backedges. 3227 proven. 0 refuted. 0 times theorem prover too weak. 2502 trivial. 0 not checked. [2021-11-20 23:20:49,815 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:20:49,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1820322615] [2021-11-20 23:20:49,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1820322615] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 23:20:49,816 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 23:20:49,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2021-11-20 23:20:49,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224986703] [2021-11-20 23:20:49,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:20:49,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 23:20:49,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:20:49,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 23:20:49,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=114, Unknown=1, NotChecked=22, Total=182 [2021-11-20 23:20:49,818 INFO L87 Difference]: Start difference. First operand 20709 states and 27177 transitions. Second operand has 6 states, 6 states have (on average 37.166666666666664) internal successors, (223), 6 states have internal predecessors, (223), 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) [2021-11-20 23:20:51,831 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:20:54,429 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_arrayElimCell_89 (_ BitVec 32)) (v_arrayElimCell_88 (_ BitVec 32))) (not (= (_ bv8641 32) (select (select (store |c_#memory_int| v_arrayElimCell_88 (store (select |c_#memory_int| v_arrayElimCell_88) (bvadd v_arrayElimCell_89 (_ bv844 32)) (_ bv3 32))) |c_ULTIMATE.start_ssl3_accept_~s#1.base|) (bvadd |c_ULTIMATE.start_ssl3_accept_~s#1.offset| (_ bv52 32)))))) (not (= (_ bv8641 32) (select (select |c_#memory_int| |c_ULTIMATE.start_ssl3_accept_~s#1.base|) (bvadd |c_ULTIMATE.start_ssl3_accept_~s#1.offset| (_ bv52 32)))))) is different from false [2021-11-20 23:20:57,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:20:57,009 INFO L93 Difference]: Finished difference Result 44317 states and 58443 transitions. [2021-11-20 23:20:57,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 23:20:57,014 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 37.166666666666664) internal successors, (223), 6 states have internal predecessors, (223), 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 785 [2021-11-20 23:20:57,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:20:57,032 INFO L225 Difference]: With dead ends: 44317 [2021-11-20 23:20:57,032 INFO L226 Difference]: Without dead ends: 23629 [2021-11-20 23:20:57,038 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1570 GetRequests, 1555 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=52, Invalid=136, Unknown=2, NotChecked=50, Total=240 [2021-11-20 23:20:57,039 INFO L933 BasicCegarLoop]: 177 mSDtfsCounter, 279 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 95 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 522 SdHoareTripleChecker+Invalid, 553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 217 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2021-11-20 23:20:57,039 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [279 Valid, 522 Invalid, 553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 240 Invalid, 1 Unknown, 217 Unchecked, 3.9s Time] [2021-11-20 23:20:57,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23629 states. [2021-11-20 23:20:58,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23629 to 20803. [2021-11-20 23:20:58,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20803 states, 20802 states have (on average 1.3154023651571964) internal successors, (27363), 20802 states have internal predecessors, (27363), 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) [2021-11-20 23:20:58,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20803 states to 20803 states and 27363 transitions. [2021-11-20 23:20:58,117 INFO L78 Accepts]: Start accepts. Automaton has 20803 states and 27363 transitions. Word has length 785 [2021-11-20 23:20:58,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:20:58,117 INFO L470 AbstractCegarLoop]: Abstraction has 20803 states and 27363 transitions. [2021-11-20 23:20:58,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 37.166666666666664) internal successors, (223), 6 states have internal predecessors, (223), 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) [2021-11-20 23:20:58,118 INFO L276 IsEmpty]: Start isEmpty. Operand 20803 states and 27363 transitions. [2021-11-20 23:20:58,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 786 [2021-11-20 23:20:58,132 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:20:58,132 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 20, 20, 20, 20, 20, 20, 19, 19, 18, 18, 17, 17, 16, 16, 16, 16, 16, 15, 15, 14, 14, 13, 13, 8, 8, 7, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:20:58,158 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2021-11-20 23:20:58,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:20:58,333 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:20:58,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:20:58,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1196163438, now seen corresponding path program 1 times [2021-11-20 23:20:58,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:20:58,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1074676339] [2021-11-20 23:20:58,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:20:58,335 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:20:58,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:20:58,336 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:20:58,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2021-11-20 23:20:59,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:20:59,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 1642 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 23:20:59,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:21:00,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-20 23:21:00,177 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-20 23:21:00,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-11-20 23:21:00,662 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 23:21:00,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-20 23:21:01,552 INFO L134 CoverageAnalysis]: Checked inductivity of 5717 backedges. 3231 proven. 0 refuted. 0 times theorem prover too weak. 2486 trivial. 0 not checked. [2021-11-20 23:21:01,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:21:03,239 INFO L134 CoverageAnalysis]: Checked inductivity of 5717 backedges. 3231 proven. 0 refuted. 0 times theorem prover too weak. 2486 trivial. 0 not checked. [2021-11-20 23:21:03,239 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:21:03,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1074676339] [2021-11-20 23:21:03,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1074676339] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:21:03,239 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:21:03,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-20 23:21:03,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721458253] [2021-11-20 23:21:03,240 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:21:03,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 23:21:03,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:21:03,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 23:21:03,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-20 23:21:03,241 INFO L87 Difference]: Start difference. First operand 20803 states and 27363 transitions. Second operand has 7 states, 7 states have (on average 37.857142857142854) internal successors, (265), 7 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:21:05,264 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:21:07,273 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:21:09,282 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:21:16,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:21:16,336 INFO L93 Difference]: Finished difference Result 48522 states and 63805 transitions. [2021-11-20 23:21:16,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 23:21:16,341 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 37.857142857142854) internal successors, (265), 7 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 785 [2021-11-20 23:21:16,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:21:16,362 INFO L225 Difference]: With dead ends: 48522 [2021-11-20 23:21:16,363 INFO L226 Difference]: Without dead ends: 27740 [2021-11-20 23:21:16,370 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1571 GetRequests, 1562 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-11-20 23:21:16,370 INFO L933 BasicCegarLoop]: 215 mSDtfsCounter, 273 mSDsluCounter, 669 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 53 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 884 SdHoareTripleChecker+Invalid, 654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.5s IncrementalHoareTripleChecker+Time [2021-11-20 23:21:16,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [273 Valid, 884 Invalid, 654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 598 Invalid, 3 Unknown, 0 Unchecked, 11.5s Time] [2021-11-20 23:21:16,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27740 states. [2021-11-20 23:21:17,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27740 to 20847. [2021-11-20 23:21:17,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20847 states, 20846 states have (on average 1.3157919984649333) internal successors, (27429), 20846 states have internal predecessors, (27429), 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) [2021-11-20 23:21:17,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20847 states to 20847 states and 27429 transitions. [2021-11-20 23:21:17,519 INFO L78 Accepts]: Start accepts. Automaton has 20847 states and 27429 transitions. Word has length 785 [2021-11-20 23:21:17,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:21:17,519 INFO L470 AbstractCegarLoop]: Abstraction has 20847 states and 27429 transitions. [2021-11-20 23:21:17,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 37.857142857142854) internal successors, (265), 7 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:21:17,520 INFO L276 IsEmpty]: Start isEmpty. Operand 20847 states and 27429 transitions. [2021-11-20 23:21:17,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 870 [2021-11-20 23:21:17,543 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:21:17,543 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 23, 23, 23, 23, 23, 23, 22, 22, 21, 21, 20, 20, 19, 19, 19, 19, 16, 15, 15, 14, 14, 13, 13, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:21:17,564 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2021-11-20 23:21:17,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:21:17,744 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:21:17,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:21:17,744 INFO L85 PathProgramCache]: Analyzing trace with hash 279065460, now seen corresponding path program 1 times [2021-11-20 23:21:17,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:21:17,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1062735319] [2021-11-20 23:21:17,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:21:17,747 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:21:17,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:21:17,747 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:21:17,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabedbc-0513-4804-bc37-4a4ef542450f/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2021-11-20 23:21:23,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:21:23,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 1801 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-20 23:21:23,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:21:24,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:21:24,670 INFO L354 Elim1Store]: treesize reduction 84, result has 47.2 percent of original size [2021-11-20 23:21:24,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 109 treesize of output 84 [2021-11-20 23:21:24,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 66 [2021-11-20 23:21:24,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 48 [2021-11-20 23:21:25,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:21:25,395 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 23:21:25,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 14 [2021-11-20 23:21:27,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-11-20 23:21:27,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-20 23:21:27,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-20 23:21:28,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:21:28,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 63 [2021-11-20 23:21:28,200 INFO L354 Elim1Store]: treesize reduction 72, result has 40.0 percent of original size [2021-11-20 23:21:28,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 60 treesize of output 79 [2021-11-20 23:21:28,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:21:28,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 57 [2021-11-20 23:21:29,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:21:29,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 98 [2021-11-20 23:21:29,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:21:30,003 INFO L354 Elim1Store]: treesize reduction 127, result has 14.2 percent of original size [2021-11-20 23:21:30,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 101 treesize of output 91 [2021-11-20 23:21:30,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:21:30,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 60 [2021-11-20 23:21:30,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:21:30,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 75 [2021-11-20 23:21:30,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:21:30,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:21:30,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:21:30,193 INFO L354 Elim1Store]: treesize reduction 105, result has 29.1 percent of original size [2021-11-20 23:21:30,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 72 treesize of output 99 [2021-11-20 23:21:30,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:21:30,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 68 [2021-11-20 23:21:32,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:21:35,273 INFO L354 Elim1Store]: treesize reduction 148, result has 36.8 percent of original size [2021-11-20 23:21:35,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 218 treesize of output 227 [2021-11-20 23:21:35,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:21:35,718 INFO L354 Elim1Store]: treesize reduction 78, result has 43.5 percent of original size [2021-11-20 23:21:35,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 230 treesize of output 215 [2021-11-20 23:21:35,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:21:35,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:21:35,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:21:37,380 INFO L354 Elim1Store]: treesize reduction 108, result has 51.1 percent of original size [2021-11-20 23:21:37,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 204 treesize of output 277 [2021-11-20 23:22:34,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:22:34,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:22:34,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:22:37,166 INFO L354 Elim1Store]: treesize reduction 138, result has 33.3 percent of original size [2021-11-20 23:22:37,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 479 treesize of output 463 [2021-11-20 23:22:37,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:22:37,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:22:37,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:22:37,728 INFO L354 Elim1Store]: treesize reduction 158, result has 23.7 percent of original size [2021-11-20 23:22:37,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 520 treesize of output 476 [2021-11-20 23:22:37,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:22:37,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:22:37,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:22:38,384 INFO L354 Elim1Store]: treesize reduction 128, result has 33.7 percent of original size [2021-11-20 23:22:38,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 539 treesize of output 503 [2021-11-20 23:22:38,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:22:38,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:22:38,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:22:38,873 INFO L354 Elim1Store]: treesize reduction 146, result has 24.4 percent of original size [2021-11-20 23:22:38,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 582 treesize of output 520 [2021-11-20 23:22:38,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:22:38,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:22:38,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:22:39,055 INFO L354 Elim1Store]: treesize reduction 102, result has 25.0 percent of original size [2021-11-20 23:22:39,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 603 treesize of output 597