./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/openssl/s3_srvr.blast.14.i.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc266d2-d484-4a40-9be4-fb1ee68b8dac/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc266d2-d484-4a40-9be4-fb1ee68b8dac/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc266d2-d484-4a40-9be4-fb1ee68b8dac/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc266d2-d484-4a40-9be4-fb1ee68b8dac/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.14.i.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc266d2-d484-4a40-9be4-fb1ee68b8dac/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc266d2-d484-4a40-9be4-fb1ee68b8dac/bin/utaipan-eEHZpOm5b7 --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 adf973339365dcd50ea4c1729cfdba4f7375ef39da53eb99572e95c3bcdc3498 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 19:09:18,748 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 19:09:18,750 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 19:09:18,781 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 19:09:18,781 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 19:09:18,782 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 19:09:18,784 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 19:09:18,786 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 19:09:18,788 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 19:09:18,789 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 19:09:18,790 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 19:09:18,791 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 19:09:18,792 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 19:09:18,793 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 19:09:18,794 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 19:09:18,796 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 19:09:18,797 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 19:09:18,798 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 19:09:18,800 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 19:09:18,802 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 19:09:18,804 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 19:09:18,805 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 19:09:18,807 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 19:09:18,808 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 19:09:18,811 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 19:09:18,811 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 19:09:18,812 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 19:09:18,813 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 19:09:18,813 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 19:09:18,814 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 19:09:18,815 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 19:09:18,816 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 19:09:18,816 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 19:09:18,817 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 19:09:18,819 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 19:09:18,819 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 19:09:18,820 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 19:09:18,820 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 19:09:18,820 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 19:09:18,821 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 19:09:18,822 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 19:09:18,823 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc266d2-d484-4a40-9be4-fb1ee68b8dac/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 19:09:18,848 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 19:09:18,848 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 19:09:18,849 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 19:09:18,849 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 19:09:18,850 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 19:09:18,850 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 19:09:18,850 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 19:09:18,850 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 19:09:18,850 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 19:09:18,851 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 19:09:18,851 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 19:09:18,851 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 19:09:18,851 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 19:09:18,851 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 19:09:18,851 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 19:09:18,852 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 19:09:18,852 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 19:09:18,852 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 19:09:18,853 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 19:09:18,853 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 19:09:18,853 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 19:09:18,853 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 19:09:18,853 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 19:09:18,854 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 19:09:18,854 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 19:09:18,854 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 19:09:18,854 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 19:09:18,854 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 19:09:18,854 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 19:09:18,855 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 19:09:18,855 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 19:09:18,855 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 19:09:18,855 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:09:18,855 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 19:09:18,856 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 19:09:18,856 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 19:09:18,856 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 19:09:18,856 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 19:09:18,856 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 19:09:18,857 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 19:09:18,857 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 19:09:18,857 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_cfc266d2-d484-4a40-9be4-fb1ee68b8dac/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc266d2-d484-4a40-9be4-fb1ee68b8dac/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> adf973339365dcd50ea4c1729cfdba4f7375ef39da53eb99572e95c3bcdc3498 [2021-11-25 19:09:19,100 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 19:09:19,119 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 19:09:19,121 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 19:09:19,123 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 19:09:19,123 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 19:09:19,125 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc266d2-d484-4a40-9be4-fb1ee68b8dac/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/openssl/s3_srvr.blast.14.i.cil-2.c [2021-11-25 19:09:19,201 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc266d2-d484-4a40-9be4-fb1ee68b8dac/bin/utaipan-eEHZpOm5b7/data/fb6fa94a7/9dc2a8f57ba64a4db7f5786124625e3b/FLAGcaea97455 [2021-11-25 19:09:19,860 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 19:09:19,861 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc266d2-d484-4a40-9be4-fb1ee68b8dac/sv-benchmarks/c/openssl/s3_srvr.blast.14.i.cil-2.c [2021-11-25 19:09:19,883 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc266d2-d484-4a40-9be4-fb1ee68b8dac/bin/utaipan-eEHZpOm5b7/data/fb6fa94a7/9dc2a8f57ba64a4db7f5786124625e3b/FLAGcaea97455 [2021-11-25 19:09:20,159 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc266d2-d484-4a40-9be4-fb1ee68b8dac/bin/utaipan-eEHZpOm5b7/data/fb6fa94a7/9dc2a8f57ba64a4db7f5786124625e3b [2021-11-25 19:09:20,161 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 19:09:20,162 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 19:09:20,164 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 19:09:20,165 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 19:09:20,180 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 19:09:20,180 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:09:20" (1/1) ... [2021-11-25 19:09:20,181 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a3277fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:09:20, skipping insertion in model container [2021-11-25 19:09:20,182 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:09:20" (1/1) ... [2021-11-25 19:09:20,189 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 19:09:20,248 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 19:09:20,667 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_cfc266d2-d484-4a40-9be4-fb1ee68b8dac/sv-benchmarks/c/openssl/s3_srvr.blast.14.i.cil-2.c[76259,76272] [2021-11-25 19:09:20,676 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:09:20,688 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 19:09:20,840 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_cfc266d2-d484-4a40-9be4-fb1ee68b8dac/sv-benchmarks/c/openssl/s3_srvr.blast.14.i.cil-2.c[76259,76272] [2021-11-25 19:09:20,858 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:09:20,874 INFO L208 MainTranslator]: Completed translation [2021-11-25 19:09:20,874 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:09:20 WrapperNode [2021-11-25 19:09:20,874 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 19:09:20,875 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 19:09:20,876 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 19:09:20,876 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 19:09:20,883 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:09:20" (1/1) ... [2021-11-25 19:09:20,906 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:09:20" (1/1) ... [2021-11-25 19:09:20,948 INFO L137 Inliner]: procedures = 31, calls = 223, calls flagged for inlining = 7, calls inlined = 3, statements flattened = 803 [2021-11-25 19:09:20,949 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 19:09:20,949 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 19:09:20,949 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 19:09:20,950 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 19:09:20,966 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:09:20" (1/1) ... [2021-11-25 19:09:20,966 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:09:20" (1/1) ... [2021-11-25 19:09:20,987 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:09:20" (1/1) ... [2021-11-25 19:09:20,988 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:09:20" (1/1) ... [2021-11-25 19:09:21,039 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:09:20" (1/1) ... [2021-11-25 19:09:21,067 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:09:20" (1/1) ... [2021-11-25 19:09:21,070 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:09:20" (1/1) ... [2021-11-25 19:09:21,076 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 19:09:21,084 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 19:09:21,084 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 19:09:21,085 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 19:09:21,086 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:09:20" (1/1) ... [2021-11-25 19:09:21,093 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:09:21,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc266d2-d484-4a40-9be4-fb1ee68b8dac/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:09:21,118 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc266d2-d484-4a40-9be4-fb1ee68b8dac/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 19:09:21,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc266d2-d484-4a40-9be4-fb1ee68b8dac/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 19:09:21,169 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 19:09:21,169 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-25 19:09:21,169 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 19:09:21,169 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 19:09:21,170 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-25 19:09:21,170 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 19:09:21,170 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-25 19:09:21,170 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 19:09:21,170 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 19:09:21,331 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 19:09:21,344 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 19:09:21,379 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-25 19:09:24,184 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2021-11-25 19:09:24,185 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2021-11-25 19:09:24,185 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 19:09:24,557 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 19:09:24,558 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-25 19:09:24,563 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:09:24 BoogieIcfgContainer [2021-11-25 19:09:24,564 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 19:09:24,566 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 19:09:24,566 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 19:09:24,569 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 19:09:24,569 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 07:09:20" (1/3) ... [2021-11-25 19:09:24,570 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66759fd7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:09:24, skipping insertion in model container [2021-11-25 19:09:24,570 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:09:20" (2/3) ... [2021-11-25 19:09:24,570 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66759fd7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:09:24, skipping insertion in model container [2021-11-25 19:09:24,571 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:09:24" (3/3) ... [2021-11-25 19:09:24,572 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.14.i.cil-2.c [2021-11-25 19:09:24,577 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 19:09:24,577 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 19:09:24,639 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 19:09:24,649 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 [2021-11-25 19:09:24,649 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 19:09:24,676 INFO L276 IsEmpty]: Start isEmpty. Operand has 109 states, 107 states have (on average 1.7570093457943925) internal successors, (188), 108 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:09:24,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-25 19:09:24,687 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:09:24,688 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] [2021-11-25 19:09:24,688 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:09:24,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:09:24,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1493167970, now seen corresponding path program 1 times [2021-11-25 19:09:24,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:09:24,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736379659] [2021-11-25 19:09:24,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:09:24,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:09:25,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:09:25,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:09:25,446 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:09:25,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736379659] [2021-11-25 19:09:25,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736379659] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:09:25,448 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:09:25,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:09:25,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404887440] [2021-11-25 19:09:25,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:09:25,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:09:25,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:09:25,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:09:25,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:09:25,482 INFO L87 Difference]: Start difference. First operand has 109 states, 107 states have (on average 1.7570093457943925) internal successors, (188), 108 states have internal predecessors, (188), 0 states have call successors, (0), 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 9.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:09:27,507 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:09:28,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:09:28,437 INFO L93 Difference]: Finished difference Result 320 states and 552 transitions. [2021-11-25 19:09:28,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:09:28,442 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 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 36 [2021-11-25 19:09:28,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:09:28,453 INFO L225 Difference]: With dead ends: 320 [2021-11-25 19:09:28,454 INFO L226 Difference]: Without dead ends: 207 [2021-11-25 19:09:28,457 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 [2021-11-25 19:09:28,460 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 115 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 52 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-11-25 19:09:28,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 279 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 254 Invalid, 1 Unknown, 0 Unchecked, 2.9s Time] [2021-11-25 19:09:28,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-11-25 19:09:28,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 143. [2021-11-25 19:09:28,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.5985915492957747) internal successors, (227), 142 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) [2021-11-25 19:09:28,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 227 transitions. [2021-11-25 19:09:28,508 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 227 transitions. Word has length 36 [2021-11-25 19:09:28,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:09:28,509 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 227 transitions. [2021-11-25 19:09:28,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:09:28,509 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 227 transitions. [2021-11-25 19:09:28,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-25 19:09:28,512 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:09:28,512 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] [2021-11-25 19:09:28,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 19:09:28,512 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:09:28,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:09:28,513 INFO L85 PathProgramCache]: Analyzing trace with hash -1197629481, now seen corresponding path program 1 times [2021-11-25 19:09:28,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:09:28,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230144271] [2021-11-25 19:09:28,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:09:28,514 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:09:28,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:09:28,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:09:28,826 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:09:28,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230144271] [2021-11-25 19:09:28,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230144271] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:09:28,828 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:09:28,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:09:28,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109380265] [2021-11-25 19:09:28,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:09:28,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:09:28,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:09:28,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:09:28,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:09:28,833 INFO L87 Difference]: Start difference. First operand 143 states and 227 transitions. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:09:30,844 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:09:31,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:09:31,219 INFO L93 Difference]: Finished difference Result 306 states and 485 transitions. [2021-11-25 19:09:31,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:09:31,220 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 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 37 [2021-11-25 19:09:31,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:09:31,222 INFO L225 Difference]: With dead ends: 306 [2021-11-25 19:09:31,222 INFO L226 Difference]: Without dead ends: 165 [2021-11-25 19:09:31,223 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 [2021-11-25 19:09:31,225 INFO L933 BasicCegarLoop]: 120 mSDtfsCounter, 11 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-25 19:09:31,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 308 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 165 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-25 19:09:31,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-11-25 19:09:31,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 153. [2021-11-25 19:09:31,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.611842105263158) internal successors, (245), 152 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:09:31,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 245 transitions. [2021-11-25 19:09:31,240 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 245 transitions. Word has length 37 [2021-11-25 19:09:31,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:09:31,240 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 245 transitions. [2021-11-25 19:09:31,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:09:31,241 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 245 transitions. [2021-11-25 19:09:31,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-25 19:09:31,243 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:09:31,244 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] [2021-11-25 19:09:31,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 19:09:31,244 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:09:31,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:09:31,245 INFO L85 PathProgramCache]: Analyzing trace with hash -1944151288, now seen corresponding path program 1 times [2021-11-25 19:09:31,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:09:31,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417710288] [2021-11-25 19:09:31,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:09:31,246 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:09:31,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:09:31,520 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:09:31,521 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:09:31,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417710288] [2021-11-25 19:09:31,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417710288] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:09:31,522 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:09:31,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:09:31,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674220342] [2021-11-25 19:09:31,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:09:31,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:09:31,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:09:31,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:09:31,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:09:31,526 INFO L87 Difference]: Start difference. First operand 153 states and 245 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:09:33,539 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:09:33,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:09:33,864 INFO L93 Difference]: Finished difference Result 306 states and 484 transitions. [2021-11-25 19:09:33,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:09:33,866 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-11-25 19:09:33,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:09:33,867 INFO L225 Difference]: With dead ends: 306 [2021-11-25 19:09:33,868 INFO L226 Difference]: Without dead ends: 165 [2021-11-25 19:09:33,869 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 [2021-11-25 19:09:33,870 INFO L933 BasicCegarLoop]: 121 mSDtfsCounter, 19 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 311 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 [2021-11-25 19:09:33,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 311 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 162 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-25 19:09:33,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-11-25 19:09:33,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 153. [2021-11-25 19:09:33,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.605263157894737) internal successors, (244), 152 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:09:33,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 244 transitions. [2021-11-25 19:09:33,884 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 244 transitions. Word has length 47 [2021-11-25 19:09:33,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:09:33,884 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 244 transitions. [2021-11-25 19:09:33,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:09:33,885 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 244 transitions. [2021-11-25 19:09:33,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-25 19:09:33,886 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:09:33,887 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] [2021-11-25 19:09:33,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 19:09:33,887 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:09:33,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:09:33,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1336824966, now seen corresponding path program 1 times [2021-11-25 19:09:33,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:09:33,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879582559] [2021-11-25 19:09:33,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:09:33,889 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:09:34,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:09:34,103 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:09:34,103 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:09:34,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879582559] [2021-11-25 19:09:34,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879582559] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:09:34,110 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:09:34,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:09:34,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548836859] [2021-11-25 19:09:34,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:09:34,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:09:34,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:09:34,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:09:34,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:09:34,113 INFO L87 Difference]: Start difference. First operand 153 states and 244 transitions. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 3 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) [2021-11-25 19:09:36,127 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:09:36,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:09:36,610 INFO L93 Difference]: Finished difference Result 395 states and 623 transitions. [2021-11-25 19:09:36,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:09:36,611 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 3 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 48 [2021-11-25 19:09:36,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:09:36,613 INFO L225 Difference]: With dead ends: 395 [2021-11-25 19:09:36,613 INFO L226 Difference]: Without dead ends: 254 [2021-11-25 19:09:36,614 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 [2021-11-25 19:09:36,615 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 119 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 52 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-25 19:09:36,616 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 211 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 243 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2021-11-25 19:09:36,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-11-25 19:09:36,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 163. [2021-11-25 19:09:36,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 1.5802469135802468) internal successors, (256), 162 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:09:36,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 256 transitions. [2021-11-25 19:09:36,630 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 256 transitions. Word has length 48 [2021-11-25 19:09:36,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:09:36,631 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 256 transitions. [2021-11-25 19:09:36,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 3 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) [2021-11-25 19:09:36,631 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 256 transitions. [2021-11-25 19:09:36,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-25 19:09:36,638 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:09:36,638 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] [2021-11-25 19:09:36,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 19:09:36,639 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:09:36,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:09:36,643 INFO L85 PathProgramCache]: Analyzing trace with hash -2073019498, now seen corresponding path program 1 times [2021-11-25 19:09:36,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:09:36,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945072466] [2021-11-25 19:09:36,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:09:36,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:09:36,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:09:36,822 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:09:36,823 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:09:36,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945072466] [2021-11-25 19:09:36,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945072466] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:09:36,823 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:09:36,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:09:36,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795909419] [2021-11-25 19:09:36,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:09:36,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:09:36,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:09:36,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:09:36,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:09:36,828 INFO L87 Difference]: Start difference. First operand 163 states and 256 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) [2021-11-25 19:09:38,839 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:09:39,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:09:39,266 INFO L93 Difference]: Finished difference Result 405 states and 633 transitions. [2021-11-25 19:09:39,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:09:39,267 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 [2021-11-25 19:09:39,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:09:39,269 INFO L225 Difference]: With dead ends: 405 [2021-11-25 19:09:39,269 INFO L226 Difference]: Without dead ends: 254 [2021-11-25 19:09:39,270 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 [2021-11-25 19:09:39,271 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 117 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 52 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-25 19:09:39,271 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 211 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 243 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-25 19:09:39,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-11-25 19:09:39,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 164. [2021-11-25 19:09:39,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 1.5644171779141105) internal successors, (255), 163 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:09:39,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 255 transitions. [2021-11-25 19:09:39,292 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 255 transitions. Word has length 49 [2021-11-25 19:09:39,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:09:39,295 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 255 transitions. [2021-11-25 19:09:39,295 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) [2021-11-25 19:09:39,296 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 255 transitions. [2021-11-25 19:09:39,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-25 19:09:39,303 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:09:39,303 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] [2021-11-25 19:09:39,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-25 19:09:39,304 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:09:39,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:09:39,305 INFO L85 PathProgramCache]: Analyzing trace with hash -1896089214, now seen corresponding path program 1 times [2021-11-25 19:09:39,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:09:39,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120651682] [2021-11-25 19:09:39,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:09:39,306 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:09:39,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:09:39,498 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:09:39,499 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:09:39,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120651682] [2021-11-25 19:09:39,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120651682] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:09:39,500 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:09:39,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:09:39,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075993962] [2021-11-25 19:09:39,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:09:39,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:09:39,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:09:39,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:09:39,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:09:39,503 INFO L87 Difference]: Start difference. First operand 164 states and 255 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) [2021-11-25 19:09:41,514 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:09:41,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:09:41,847 INFO L93 Difference]: Finished difference Result 328 states and 507 transitions. [2021-11-25 19:09:41,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:09:41,849 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 [2021-11-25 19:09:41,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:09:41,850 INFO L225 Difference]: With dead ends: 328 [2021-11-25 19:09:41,850 INFO L226 Difference]: Without dead ends: 176 [2021-11-25 19:09:41,851 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 [2021-11-25 19:09:41,851 INFO L933 BasicCegarLoop]: 121 mSDtfsCounter, 11 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 310 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 [2021-11-25 19:09:41,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 310 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 163 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-25 19:09:41,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-11-25 19:09:41,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 164. [2021-11-25 19:09:41,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 1.5582822085889572) internal successors, (254), 163 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:09:41,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 254 transitions. [2021-11-25 19:09:41,878 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 254 transitions. Word has length 49 [2021-11-25 19:09:41,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:09:41,878 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 254 transitions. [2021-11-25 19:09:41,878 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) [2021-11-25 19:09:41,878 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 254 transitions. [2021-11-25 19:09:41,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-25 19:09:41,879 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:09:41,880 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] [2021-11-25 19:09:41,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-25 19:09:41,880 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:09:41,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:09:41,881 INFO L85 PathProgramCache]: Analyzing trace with hash 996223980, now seen corresponding path program 1 times [2021-11-25 19:09:41,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:09:41,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726658507] [2021-11-25 19:09:41,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:09:41,882 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:09:41,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:09:42,054 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:09:42,055 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:09:42,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726658507] [2021-11-25 19:09:42,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726658507] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:09:42,056 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:09:42,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:09:42,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880058966] [2021-11-25 19:09:42,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:09:42,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:09:42,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:09:42,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:09:42,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:09:42,058 INFO L87 Difference]: Start difference. First operand 164 states and 254 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) [2021-11-25 19:09:44,068 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:09:44,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:09:44,496 INFO L93 Difference]: Finished difference Result 406 states and 629 transitions. [2021-11-25 19:09:44,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:09:44,496 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 [2021-11-25 19:09:44,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:09:44,498 INFO L225 Difference]: With dead ends: 406 [2021-11-25 19:09:44,498 INFO L226 Difference]: Without dead ends: 254 [2021-11-25 19:09:44,499 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 [2021-11-25 19:09:44,500 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 112 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 51 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-25 19:09:44,500 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 212 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 242 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-25 19:09:44,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-11-25 19:09:44,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 169. [2021-11-25 19:09:44,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 1.5535714285714286) internal successors, (261), 168 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:09:44,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 261 transitions. [2021-11-25 19:09:44,509 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 261 transitions. Word has length 49 [2021-11-25 19:09:44,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:09:44,510 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 261 transitions. [2021-11-25 19:09:44,510 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) [2021-11-25 19:09:44,510 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 261 transitions. [2021-11-25 19:09:44,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-25 19:09:44,511 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:09:44,511 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] [2021-11-25 19:09:44,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-25 19:09:44,512 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:09:44,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:09:44,512 INFO L85 PathProgramCache]: Analyzing trace with hash 527895986, now seen corresponding path program 1 times [2021-11-25 19:09:44,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:09:44,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786339606] [2021-11-25 19:09:44,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:09:44,513 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:09:44,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:09:44,685 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:09:44,686 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:09:44,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786339606] [2021-11-25 19:09:44,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786339606] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:09:44,689 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:09:44,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:09:44,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902343715] [2021-11-25 19:09:44,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:09:44,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:09:44,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:09:44,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:09:44,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:09:44,691 INFO L87 Difference]: Start difference. First operand 169 states and 261 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) [2021-11-25 19:09:46,701 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:09:47,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:09:47,141 INFO L93 Difference]: Finished difference Result 411 states and 634 transitions. [2021-11-25 19:09:47,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:09:47,142 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 [2021-11-25 19:09:47,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:09:47,144 INFO L225 Difference]: With dead ends: 411 [2021-11-25 19:09:47,144 INFO L226 Difference]: Without dead ends: 254 [2021-11-25 19:09:47,145 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 [2021-11-25 19:09:47,146 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 112 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 51 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-25 19:09:47,146 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 211 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 243 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-25 19:09:47,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-11-25 19:09:47,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 169. [2021-11-25 19:09:47,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 1.5357142857142858) internal successors, (258), 168 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:09:47,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 258 transitions. [2021-11-25 19:09:47,154 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 258 transitions. Word has length 50 [2021-11-25 19:09:47,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:09:47,155 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 258 transitions. [2021-11-25 19:09:47,155 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) [2021-11-25 19:09:47,155 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 258 transitions. [2021-11-25 19:09:47,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-25 19:09:47,156 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:09:47,156 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] [2021-11-25 19:09:47,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-25 19:09:47,157 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:09:47,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:09:47,157 INFO L85 PathProgramCache]: Analyzing trace with hash -1232517791, now seen corresponding path program 1 times [2021-11-25 19:09:47,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:09:47,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663740055] [2021-11-25 19:09:47,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:09:47,158 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:09:47,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:09:47,306 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:09:47,306 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:09:47,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663740055] [2021-11-25 19:09:47,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663740055] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:09:47,306 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:09:47,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:09:47,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260819707] [2021-11-25 19:09:47,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:09:47,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:09:47,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:09:47,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:09:47,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:09:47,308 INFO L87 Difference]: Start difference. First operand 169 states and 258 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) [2021-11-25 19:09:49,319 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:09:49,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:09:49,759 INFO L93 Difference]: Finished difference Result 411 states and 629 transitions. [2021-11-25 19:09:49,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:09:49,760 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 [2021-11-25 19:09:49,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:09:49,762 INFO L225 Difference]: With dead ends: 411 [2021-11-25 19:09:49,762 INFO L226 Difference]: Without dead ends: 254 [2021-11-25 19:09:49,762 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 [2021-11-25 19:09:49,763 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 114 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 51 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-25 19:09:49,763 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 211 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 243 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-25 19:09:49,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-11-25 19:09:49,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 169. [2021-11-25 19:09:49,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 1.5178571428571428) internal successors, (255), 168 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:09:49,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 255 transitions. [2021-11-25 19:09:49,771 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 255 transitions. Word has length 50 [2021-11-25 19:09:49,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:09:49,772 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 255 transitions. [2021-11-25 19:09:49,772 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) [2021-11-25 19:09:49,772 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 255 transitions. [2021-11-25 19:09:49,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-25 19:09:49,773 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:09:49,773 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] [2021-11-25 19:09:49,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-25 19:09:49,773 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:09:49,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:09:49,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1775270959, now seen corresponding path program 1 times [2021-11-25 19:09:49,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:09:49,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977182734] [2021-11-25 19:09:49,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:09:49,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:09:49,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:09:49,934 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:09:49,935 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:09:49,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977182734] [2021-11-25 19:09:49,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977182734] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:09:49,935 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:09:49,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:09:49,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733458373] [2021-11-25 19:09:49,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:09:49,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:09:49,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:09:49,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:09:49,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:09:49,937 INFO L87 Difference]: Start difference. First operand 169 states and 255 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) [2021-11-25 19:09:51,948 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:09:52,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:09:52,392 INFO L93 Difference]: Finished difference Result 411 states and 624 transitions. [2021-11-25 19:09:52,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:09:52,393 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 [2021-11-25 19:09:52,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:09:52,395 INFO L225 Difference]: With dead ends: 411 [2021-11-25 19:09:52,395 INFO L226 Difference]: Without dead ends: 254 [2021-11-25 19:09:52,395 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 [2021-11-25 19:09:52,396 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 112 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 51 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-25 19:09:52,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 211 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 243 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-25 19:09:52,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-11-25 19:09:52,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 169. [2021-11-25 19:09:52,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 1.5) internal successors, (252), 168 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:09:52,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 252 transitions. [2021-11-25 19:09:52,405 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 252 transitions. Word has length 51 [2021-11-25 19:09:52,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:09:52,405 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 252 transitions. [2021-11-25 19:09:52,406 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) [2021-11-25 19:09:52,406 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 252 transitions. [2021-11-25 19:09:52,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-25 19:09:52,407 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:09:52,407 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] [2021-11-25 19:09:52,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-25 19:09:52,407 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:09:52,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:09:52,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1337561730, now seen corresponding path program 1 times [2021-11-25 19:09:52,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:09:52,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396646052] [2021-11-25 19:09:52,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:09:52,408 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:09:52,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:09:52,553 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:09:52,553 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:09:52,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396646052] [2021-11-25 19:09:52,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396646052] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:09:52,554 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:09:52,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:09:52,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624175243] [2021-11-25 19:09:52,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:09:52,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:09:52,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:09:52,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:09:52,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:09:52,558 INFO L87 Difference]: Start difference. First operand 169 states and 252 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 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) [2021-11-25 19:09:54,572 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:09:55,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:09:55,021 INFO L93 Difference]: Finished difference Result 411 states and 619 transitions. [2021-11-25 19:09:55,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:09:55,026 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 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 [2021-11-25 19:09:55,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:09:55,028 INFO L225 Difference]: With dead ends: 411 [2021-11-25 19:09:55,028 INFO L226 Difference]: Without dead ends: 254 [2021-11-25 19:09:55,029 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 [2021-11-25 19:09:55,030 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 83 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 48 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-25 19:09:55,030 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 244 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 249 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-25 19:09:55,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-11-25 19:09:55,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 191. [2021-11-25 19:09:55,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.5526315789473684) internal successors, (295), 190 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:09:55,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 295 transitions. [2021-11-25 19:09:55,041 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 295 transitions. Word has length 52 [2021-11-25 19:09:55,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:09:55,042 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 295 transitions. [2021-11-25 19:09:55,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 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) [2021-11-25 19:09:55,042 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 295 transitions. [2021-11-25 19:09:55,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-25 19:09:55,043 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:09:55,043 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:09:55,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-25 19:09:55,044 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:09:55,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:09:55,044 INFO L85 PathProgramCache]: Analyzing trace with hash -258973653, now seen corresponding path program 1 times [2021-11-25 19:09:55,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:09:55,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205745583] [2021-11-25 19:09:55,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:09:55,045 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:09:55,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:09:55,192 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:09:55,193 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:09:55,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205745583] [2021-11-25 19:09:55,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205745583] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:09:55,193 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:09:55,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:09:55,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525255244] [2021-11-25 19:09:55,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:09:55,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:09:55,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:09:55,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:09:55,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:09:55,195 INFO L87 Difference]: Start difference. First operand 191 states and 295 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:09:57,205 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:09:57,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:09:57,649 INFO L93 Difference]: Finished difference Result 505 states and 783 transitions. [2021-11-25 19:09:57,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:09:57,649 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-25 19:09:57,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:09:57,652 INFO L225 Difference]: With dead ends: 505 [2021-11-25 19:09:57,652 INFO L226 Difference]: Without dead ends: 326 [2021-11-25 19:09:57,652 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 [2021-11-25 19:09:57,653 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 89 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 39 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-25 19:09:57,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 236 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 245 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-25 19:09:57,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-11-25 19:09:57,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 251. [2021-11-25 19:09:57,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 250 states have (on average 1.564) internal successors, (391), 250 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:09:57,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 391 transitions. [2021-11-25 19:09:57,667 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 391 transitions. Word has length 79 [2021-11-25 19:09:57,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:09:57,667 INFO L470 AbstractCegarLoop]: Abstraction has 251 states and 391 transitions. [2021-11-25 19:09:57,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:09:57,667 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 391 transitions. [2021-11-25 19:09:57,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-25 19:09:57,669 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:09:57,669 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:09:57,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-25 19:09:57,669 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:09:57,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:09:57,670 INFO L85 PathProgramCache]: Analyzing trace with hash 2038430939, now seen corresponding path program 1 times [2021-11-25 19:09:57,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:09:57,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684962162] [2021-11-25 19:09:57,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:09:57,670 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:09:57,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:09:57,861 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:09:57,861 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:09:57,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684962162] [2021-11-25 19:09:57,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684962162] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:09:57,862 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:09:57,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:09:57,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149089593] [2021-11-25 19:09:57,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:09:57,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:09:57,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:09:57,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:09:57,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:09:57,864 INFO L87 Difference]: Start difference. First operand 251 states and 391 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:09:59,874 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:10:00,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:10:00,303 INFO L93 Difference]: Finished difference Result 591 states and 915 transitions. [2021-11-25 19:10:00,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:10:00,304 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 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 84 [2021-11-25 19:10:00,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:10:00,306 INFO L225 Difference]: With dead ends: 591 [2021-11-25 19:10:00,306 INFO L226 Difference]: Without dead ends: 352 [2021-11-25 19:10:00,307 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 [2021-11-25 19:10:00,307 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 85 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 47 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-25 19:10:00,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 230 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 248 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-25 19:10:00,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-11-25 19:10:00,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 286. [2021-11-25 19:10:00,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 1.568421052631579) internal successors, (447), 285 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:10:00,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 447 transitions. [2021-11-25 19:10:00,322 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 447 transitions. Word has length 84 [2021-11-25 19:10:00,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:10:00,322 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 447 transitions. [2021-11-25 19:10:00,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:10:00,323 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 447 transitions. [2021-11-25 19:10:00,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-25 19:10:00,324 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:10:00,324 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:10:00,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-25 19:10:00,325 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:10:00,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:10:00,325 INFO L85 PathProgramCache]: Analyzing trace with hash -261595848, now seen corresponding path program 1 times [2021-11-25 19:10:00,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:10:00,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964052725] [2021-11-25 19:10:00,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:10:00,326 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:10:00,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:10:00,477 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:10:00,478 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:10:00,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964052725] [2021-11-25 19:10:00,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964052725] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:10:00,479 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:10:00,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:10:00,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154711942] [2021-11-25 19:10:00,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:10:00,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:10:00,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:10:00,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:10:00,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:10:00,481 INFO L87 Difference]: Start difference. First operand 286 states and 447 transitions. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:10:02,491 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:10:02,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:10:02,986 INFO L93 Difference]: Finished difference Result 623 states and 965 transitions. [2021-11-25 19:10:02,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:10:02,987 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 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 85 [2021-11-25 19:10:02,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:10:02,989 INFO L225 Difference]: With dead ends: 623 [2021-11-25 19:10:02,989 INFO L226 Difference]: Without dead ends: 349 [2021-11-25 19:10:02,990 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 [2021-11-25 19:10:02,991 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 84 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 49 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-25 19:10:02,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 230 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 247 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2021-11-25 19:10:02,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-11-25 19:10:03,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 286. [2021-11-25 19:10:03,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 1.5614035087719298) internal successors, (445), 285 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:10:03,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 445 transitions. [2021-11-25 19:10:03,006 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 445 transitions. Word has length 85 [2021-11-25 19:10:03,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:10:03,007 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 445 transitions. [2021-11-25 19:10:03,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:10:03,007 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 445 transitions. [2021-11-25 19:10:03,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-25 19:10:03,009 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:10:03,009 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:10:03,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-25 19:10:03,009 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:10:03,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:10:03,010 INFO L85 PathProgramCache]: Analyzing trace with hash -2068246035, now seen corresponding path program 1 times [2021-11-25 19:10:03,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:10:03,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823242539] [2021-11-25 19:10:03,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:10:03,011 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:10:03,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:10:03,206 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:10:03,207 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:10:03,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823242539] [2021-11-25 19:10:03,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823242539] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:10:03,207 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:10:03,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:10:03,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593008220] [2021-11-25 19:10:03,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:10:03,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:10:03,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:10:03,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:10:03,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:10:03,209 INFO L87 Difference]: Start difference. First operand 286 states and 445 transitions. 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) [2021-11-25 19:10:05,220 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:10:05,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:10:05,660 INFO L93 Difference]: Finished difference Result 661 states and 1021 transitions. [2021-11-25 19:10:05,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:10:05,661 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 90 [2021-11-25 19:10:05,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:10:05,663 INFO L225 Difference]: With dead ends: 661 [2021-11-25 19:10:05,663 INFO L226 Difference]: Without dead ends: 387 [2021-11-25 19:10:05,664 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 [2021-11-25 19:10:05,665 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 77 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 47 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-25 19:10:05,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 245 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 250 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-25 19:10:05,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-11-25 19:10:05,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 327. [2021-11-25 19:10:05,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 1.5644171779141105) internal successors, (510), 326 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:10:05,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 510 transitions. [2021-11-25 19:10:05,684 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 510 transitions. Word has length 90 [2021-11-25 19:10:05,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:10:05,684 INFO L470 AbstractCegarLoop]: Abstraction has 327 states and 510 transitions. [2021-11-25 19:10:05,685 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) [2021-11-25 19:10:05,685 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 510 transitions. [2021-11-25 19:10:05,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-25 19:10:05,686 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:10:05,686 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:10:05,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-25 19:10:05,687 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:10:05,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:10:05,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1513478624, now seen corresponding path program 1 times [2021-11-25 19:10:05,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:10:05,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130454564] [2021-11-25 19:10:05,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:10:05,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:10:05,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:10:05,872 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-25 19:10:05,872 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:10:05,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130454564] [2021-11-25 19:10:05,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130454564] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:10:05,875 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:10:05,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:10:05,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031372948] [2021-11-25 19:10:05,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:10:05,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:10:05,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:10:05,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:10:05,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:10:05,877 INFO L87 Difference]: Start difference. First operand 327 states and 510 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) [2021-11-25 19:10:07,887 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:10:08,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:10:08,313 INFO L93 Difference]: Finished difference Result 720 states and 1119 transitions. [2021-11-25 19:10:08,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:10:08,314 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 91 [2021-11-25 19:10:08,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:10:08,317 INFO L225 Difference]: With dead ends: 720 [2021-11-25 19:10:08,317 INFO L226 Difference]: Without dead ends: 405 [2021-11-25 19:10:08,318 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 [2021-11-25 19:10:08,318 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 78 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-25 19:10:08,319 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 249 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 247 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-25 19:10:08,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2021-11-25 19:10:08,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 341. [2021-11-25 19:10:08,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 1.5529411764705883) internal successors, (528), 340 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:10:08,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 528 transitions. [2021-11-25 19:10:08,335 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 528 transitions. Word has length 91 [2021-11-25 19:10:08,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:10:08,335 INFO L470 AbstractCegarLoop]: Abstraction has 341 states and 528 transitions. [2021-11-25 19:10:08,335 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) [2021-11-25 19:10:08,335 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 528 transitions. [2021-11-25 19:10:08,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-25 19:10:08,337 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:10:08,337 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:10:08,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-25 19:10:08,337 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:10:08,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:10:08,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1590259030, now seen corresponding path program 1 times [2021-11-25 19:10:08,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:10:08,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130198635] [2021-11-25 19:10:08,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:10:08,339 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:10:08,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:10:08,485 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-25 19:10:08,485 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:10:08,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130198635] [2021-11-25 19:10:08,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130198635] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:10:08,486 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:10:08,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:10:08,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160885592] [2021-11-25 19:10:08,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:10:08,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:10:08,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:10:08,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:10:08,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:10:08,488 INFO L87 Difference]: Start difference. First operand 341 states and 528 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:10:10,498 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:10:10,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:10:10,789 INFO L93 Difference]: Finished difference Result 688 states and 1068 transitions. [2021-11-25 19:10:10,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:10:10,790 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 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 91 [2021-11-25 19:10:10,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:10:10,793 INFO L225 Difference]: With dead ends: 688 [2021-11-25 19:10:10,793 INFO L226 Difference]: Without dead ends: 359 [2021-11-25 19:10:10,793 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 [2021-11-25 19:10:10,794 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 15 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 323 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 [2021-11-25 19:10:10,794 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 323 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 174 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-25 19:10:10,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-11-25 19:10:10,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 347. [2021-11-25 19:10:10,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 1.5520231213872833) internal successors, (537), 346 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:10:10,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 537 transitions. [2021-11-25 19:10:10,809 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 537 transitions. Word has length 91 [2021-11-25 19:10:10,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:10:10,810 INFO L470 AbstractCegarLoop]: Abstraction has 347 states and 537 transitions. [2021-11-25 19:10:10,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:10:10,810 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 537 transitions. [2021-11-25 19:10:10,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-25 19:10:10,811 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:10:10,812 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2021-11-25 19:10:10,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-25 19:10:10,812 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:10:10,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:10:10,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1299669647, now seen corresponding path program 1 times [2021-11-25 19:10:10,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:10:10,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126353145] [2021-11-25 19:10:10,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:10:10,833 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:10:10,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:10:11,021 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-25 19:10:11,021 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:10:11,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126353145] [2021-11-25 19:10:11,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126353145] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:10:11,022 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:10:11,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:10:11,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54681213] [2021-11-25 19:10:11,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:10:11,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:10:11,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:10:11,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:10:11,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:10:11,024 INFO L87 Difference]: Start difference. First operand 347 states and 537 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) [2021-11-25 19:10:13,034 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:10:13,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:10:13,447 INFO L93 Difference]: Finished difference Result 737 states and 1135 transitions. [2021-11-25 19:10:13,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:10:13,447 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 101 [2021-11-25 19:10:13,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:10:13,450 INFO L225 Difference]: With dead ends: 737 [2021-11-25 19:10:13,450 INFO L226 Difference]: Without dead ends: 402 [2021-11-25 19:10:13,451 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 [2021-11-25 19:10:13,452 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 107 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 41 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-25 19:10:13,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 254 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 238 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-25 19:10:13,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-11-25 19:10:13,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 347. [2021-11-25 19:10:13,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 1.5317919075144508) internal successors, (530), 346 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:10:13,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 530 transitions. [2021-11-25 19:10:13,468 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 530 transitions. Word has length 101 [2021-11-25 19:10:13,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:10:13,468 INFO L470 AbstractCegarLoop]: Abstraction has 347 states and 530 transitions. [2021-11-25 19:10:13,469 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) [2021-11-25 19:10:13,469 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 530 transitions. [2021-11-25 19:10:13,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-25 19:10:13,470 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:10:13,471 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:10:13,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-25 19:10:13,471 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:10:13,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:10:13,472 INFO L85 PathProgramCache]: Analyzing trace with hash -2147033548, now seen corresponding path program 1 times [2021-11-25 19:10:13,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:10:13,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134612128] [2021-11-25 19:10:13,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:10:13,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:10:13,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:10:13,787 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-25 19:10:13,787 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:10:13,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134612128] [2021-11-25 19:10:13,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134612128] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:10:13,788 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:10:13,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:10:13,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110329190] [2021-11-25 19:10:13,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:10:13,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:10:13,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:10:13,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:10:13,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:10:13,791 INFO L87 Difference]: Start difference. First operand 347 states and 530 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:10:15,803 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:10:16,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:10:16,175 INFO L93 Difference]: Finished difference Result 776 states and 1183 transitions. [2021-11-25 19:10:16,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:10:16,176 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2021-11-25 19:10:16,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:10:16,179 INFO L225 Difference]: With dead ends: 776 [2021-11-25 19:10:16,179 INFO L226 Difference]: Without dead ends: 441 [2021-11-25 19:10:16,180 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 [2021-11-25 19:10:16,181 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 101 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 38 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-25 19:10:16,181 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 242 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 235 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-25 19:10:16,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2021-11-25 19:10:16,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 361. [2021-11-25 19:10:16,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 360 states have (on average 1.5055555555555555) internal successors, (542), 360 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:10:16,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 542 transitions. [2021-11-25 19:10:16,198 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 542 transitions. Word has length 109 [2021-11-25 19:10:16,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:10:16,199 INFO L470 AbstractCegarLoop]: Abstraction has 361 states and 542 transitions. [2021-11-25 19:10:16,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:10:16,199 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 542 transitions. [2021-11-25 19:10:16,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-25 19:10:16,200 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:10:16,201 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] [2021-11-25 19:10:16,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-25 19:10:16,201 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:10:16,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:10:16,202 INFO L85 PathProgramCache]: Analyzing trace with hash 2071153342, now seen corresponding path program 1 times [2021-11-25 19:10:16,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:10:16,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955904032] [2021-11-25 19:10:16,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:10:16,203 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:10:16,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:10:16,479 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-25 19:10:16,479 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:10:16,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955904032] [2021-11-25 19:10:16,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955904032] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:10:16,479 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:10:16,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 19:10:16,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444072956] [2021-11-25 19:10:16,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:10:16,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 19:10:16,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:10:16,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 19:10:16,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-25 19:10:16,481 INFO L87 Difference]: Start difference. First operand 361 states and 542 transitions. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 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) [2021-11-25 19:10:18,492 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:10:19,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:10:19,067 INFO L93 Difference]: Finished difference Result 779 states and 1170 transitions. [2021-11-25 19:10:19,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 19:10:19,068 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 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 109 [2021-11-25 19:10:19,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:10:19,070 INFO L225 Difference]: With dead ends: 779 [2021-11-25 19:10:19,071 INFO L226 Difference]: Without dead ends: 430 [2021-11-25 19:10:19,071 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 [2021-11-25 19:10:19,072 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 107 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-25 19:10:19,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 377 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 358 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2021-11-25 19:10:19,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2021-11-25 19:10:19,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 400. [2021-11-25 19:10:19,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 1.506265664160401) internal successors, (601), 399 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:10:19,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 601 transitions. [2021-11-25 19:10:19,089 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 601 transitions. Word has length 109 [2021-11-25 19:10:19,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:10:19,090 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 601 transitions. [2021-11-25 19:10:19,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 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) [2021-11-25 19:10:19,090 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 601 transitions. [2021-11-25 19:10:19,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-25 19:10:19,092 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:10:19,092 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, 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] [2021-11-25 19:10:19,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-25 19:10:19,093 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:10:19,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:10:19,093 INFO L85 PathProgramCache]: Analyzing trace with hash -1519458991, now seen corresponding path program 1 times [2021-11-25 19:10:19,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:10:19,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403863719] [2021-11-25 19:10:19,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:10:19,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:10:19,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:10:19,344 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-25 19:10:19,344 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:10:19,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403863719] [2021-11-25 19:10:19,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403863719] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:10:19,344 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:10:19,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:10:19,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238537921] [2021-11-25 19:10:19,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:10:19,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:10:19,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:10:19,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:10:19,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:10:19,347 INFO L87 Difference]: Start difference. First operand 400 states and 601 transitions. Second operand has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:10:21,358 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:10:21,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:10:21,792 INFO L93 Difference]: Finished difference Result 884 states and 1326 transitions. [2021-11-25 19:10:21,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:10:21,793 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 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 [2021-11-25 19:10:21,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:10:21,796 INFO L225 Difference]: With dead ends: 884 [2021-11-25 19:10:21,796 INFO L226 Difference]: Without dead ends: 496 [2021-11-25 19:10:21,797 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 [2021-11-25 19:10:21,797 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 87 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 33 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-25 19:10:21,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 260 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 242 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-25 19:10:21,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2021-11-25 19:10:21,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 428. [2021-11-25 19:10:21,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 427 states have (on average 1.4918032786885247) internal successors, (637), 427 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:10:21,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 637 transitions. [2021-11-25 19:10:21,818 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 637 transitions. Word has length 123 [2021-11-25 19:10:21,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:10:21,818 INFO L470 AbstractCegarLoop]: Abstraction has 428 states and 637 transitions. [2021-11-25 19:10:21,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:10:21,819 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 637 transitions. [2021-11-25 19:10:21,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-25 19:10:21,820 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:10:21,821 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, 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] [2021-11-25 19:10:21,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-25 19:10:21,821 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:10:21,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:10:21,822 INFO L85 PathProgramCache]: Analyzing trace with hash -791640889, now seen corresponding path program 1 times [2021-11-25 19:10:21,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:10:21,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917474029] [2021-11-25 19:10:21,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:10:21,823 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:10:21,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:10:22,097 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 128 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-25 19:10:22,098 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:10:22,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917474029] [2021-11-25 19:10:22,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917474029] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:10:22,098 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:10:22,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 19:10:22,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880938087] [2021-11-25 19:10:22,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:10:22,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 19:10:22,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:10:22,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 19:10:22,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-25 19:10:22,100 INFO L87 Difference]: Start difference. First operand 428 states and 637 transitions. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 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) [2021-11-25 19:10:24,112 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:10:24,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:10:24,654 INFO L93 Difference]: Finished difference Result 872 states and 1298 transitions. [2021-11-25 19:10:24,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 19:10:24,657 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 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 124 [2021-11-25 19:10:24,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:10:24,660 INFO L225 Difference]: With dead ends: 872 [2021-11-25 19:10:24,660 INFO L226 Difference]: Without dead ends: 456 [2021-11-25 19:10:24,661 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 [2021-11-25 19:10:24,662 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 97 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-25 19:10:24,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 395 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 377 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2021-11-25 19:10:24,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-11-25 19:10:24,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 428. [2021-11-25 19:10:24,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 427 states have (on average 1.4894613583138174) internal successors, (636), 427 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:10:24,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 636 transitions. [2021-11-25 19:10:24,680 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 636 transitions. Word has length 124 [2021-11-25 19:10:24,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:10:24,681 INFO L470 AbstractCegarLoop]: Abstraction has 428 states and 636 transitions. [2021-11-25 19:10:24,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 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) [2021-11-25 19:10:24,681 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 636 transitions. [2021-11-25 19:10:24,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-25 19:10:24,683 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:10:24,683 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:10:24,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-25 19:10:24,684 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:10:24,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:10:24,684 INFO L85 PathProgramCache]: Analyzing trace with hash 385360697, now seen corresponding path program 1 times [2021-11-25 19:10:24,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:10:24,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555306768] [2021-11-25 19:10:24,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:10:24,685 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:10:24,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:10:24,909 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 122 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-25 19:10:24,910 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:10:24,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555306768] [2021-11-25 19:10:24,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555306768] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:10:24,910 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:10:24,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 19:10:24,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222324176] [2021-11-25 19:10:24,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:10:24,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:10:24,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:10:24,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:10:24,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:10:24,913 INFO L87 Difference]: Start difference. First operand 428 states and 636 transitions. Second operand has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:10:26,924 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:10:27,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:10:27,387 INFO L93 Difference]: Finished difference Result 940 states and 1395 transitions. [2021-11-25 19:10:27,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:10:27,388 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 126 [2021-11-25 19:10:27,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:10:27,391 INFO L225 Difference]: With dead ends: 940 [2021-11-25 19:10:27,391 INFO L226 Difference]: Without dead ends: 524 [2021-11-25 19:10:27,392 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 [2021-11-25 19:10:27,393 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 198 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 76 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-25 19:10:27,393 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 259 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 241 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-25 19:10:27,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2021-11-25 19:10:27,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 454. [2021-11-25 19:10:27,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 453 states have (on average 1.4724061810154525) internal successors, (667), 453 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:10:27,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 667 transitions. [2021-11-25 19:10:27,412 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 667 transitions. Word has length 126 [2021-11-25 19:10:27,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:10:27,412 INFO L470 AbstractCegarLoop]: Abstraction has 454 states and 667 transitions. [2021-11-25 19:10:27,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:10:27,413 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 667 transitions. [2021-11-25 19:10:27,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-25 19:10:27,415 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:10:27,415 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, 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] [2021-11-25 19:10:27,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-25 19:10:27,415 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:10:27,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:10:27,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1898168163, now seen corresponding path program 1 times [2021-11-25 19:10:27,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:10:27,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839293774] [2021-11-25 19:10:27,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:10:27,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:10:27,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:10:27,653 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 124 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-25 19:10:27,653 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:10:27,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839293774] [2021-11-25 19:10:27,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839293774] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:10:27,654 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:10:27,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:10:27,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304120443] [2021-11-25 19:10:27,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:10:27,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:10:27,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:10:27,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:10:27,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:10:27,656 INFO L87 Difference]: Start difference. First operand 454 states and 667 transitions. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:10:29,666 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:10:30,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:10:30,011 INFO L93 Difference]: Finished difference Result 951 states and 1395 transitions. [2021-11-25 19:10:30,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:10:30,011 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 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 127 [2021-11-25 19:10:30,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:10:30,014 INFO L225 Difference]: With dead ends: 951 [2021-11-25 19:10:30,014 INFO L226 Difference]: Without dead ends: 509 [2021-11-25 19:10:30,015 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 [2021-11-25 19:10:30,016 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 88 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 40 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-25 19:10:30,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 246 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 237 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-25 19:10:30,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-11-25 19:10:30,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 454. [2021-11-25 19:10:30,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 453 states have (on average 1.4547461368653423) internal successors, (659), 453 states have internal predecessors, (659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:10:30,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 659 transitions. [2021-11-25 19:10:30,035 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 659 transitions. Word has length 127 [2021-11-25 19:10:30,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:10:30,035 INFO L470 AbstractCegarLoop]: Abstraction has 454 states and 659 transitions. [2021-11-25 19:10:30,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:10:30,036 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 659 transitions. [2021-11-25 19:10:30,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-25 19:10:30,038 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:10:30,038 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] [2021-11-25 19:10:30,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-25 19:10:30,038 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:10:30,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:10:30,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1838208026, now seen corresponding path program 1 times [2021-11-25 19:10:30,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:10:30,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851393034] [2021-11-25 19:10:30,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:10:30,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:10:30,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:10:30,211 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-25 19:10:30,212 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:10:30,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851393034] [2021-11-25 19:10:30,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851393034] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:10:30,212 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:10:30,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:10:30,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204948712] [2021-11-25 19:10:30,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:10:30,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:10:30,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:10:30,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:10:30,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:10:30,215 INFO L87 Difference]: Start difference. First operand 454 states and 659 transitions. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:10:32,226 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:10:32,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:10:32,524 INFO L93 Difference]: Finished difference Result 929 states and 1351 transitions. [2021-11-25 19:10:32,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:10:32,525 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 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 130 [2021-11-25 19:10:32,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:10:32,528 INFO L225 Difference]: With dead ends: 929 [2021-11-25 19:10:32,528 INFO L226 Difference]: Without dead ends: 487 [2021-11-25 19:10:32,529 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 [2021-11-25 19:10:32,529 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 19 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-25 19:10:32,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 373 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 190 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-25 19:10:32,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2021-11-25 19:10:32,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 478. [2021-11-25 19:10:32,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 477 states have (on average 1.4528301886792452) internal successors, (693), 477 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:10:32,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 693 transitions. [2021-11-25 19:10:32,548 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 693 transitions. Word has length 130 [2021-11-25 19:10:32,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:10:32,548 INFO L470 AbstractCegarLoop]: Abstraction has 478 states and 693 transitions. [2021-11-25 19:10:32,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:10:32,548 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 693 transitions. [2021-11-25 19:10:32,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-25 19:10:32,550 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:10:32,550 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, 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] [2021-11-25 19:10:32,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-25 19:10:32,551 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:10:32,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:10:32,551 INFO L85 PathProgramCache]: Analyzing trace with hash -976405062, now seen corresponding path program 1 times [2021-11-25 19:10:32,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:10:32,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800595771] [2021-11-25 19:10:32,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:10:32,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:10:32,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:10:32,850 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 136 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-25 19:10:32,850 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:10:32,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800595771] [2021-11-25 19:10:32,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800595771] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:10:32,851 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:10:32,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:10:32,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822917246] [2021-11-25 19:10:32,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:10:32,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:10:32,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:10:32,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:10:32,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:10:32,854 INFO L87 Difference]: Start difference. First operand 478 states and 693 transitions. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:10:34,865 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:10:35,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:10:35,283 INFO L93 Difference]: Finished difference Result 1040 states and 1507 transitions. [2021-11-25 19:10:35,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:10:35,283 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 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 [2021-11-25 19:10:35,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:10:35,286 INFO L225 Difference]: With dead ends: 1040 [2021-11-25 19:10:35,286 INFO L226 Difference]: Without dead ends: 574 [2021-11-25 19:10:35,287 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 [2021-11-25 19:10:35,288 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 81 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 38 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-25 19:10:35,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 246 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 238 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-25 19:10:35,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2021-11-25 19:10:35,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 511. [2021-11-25 19:10:35,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 510 states have (on average 1.4450980392156862) internal successors, (737), 510 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:10:35,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 737 transitions. [2021-11-25 19:10:35,310 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 737 transitions. Word has length 133 [2021-11-25 19:10:35,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:10:35,310 INFO L470 AbstractCegarLoop]: Abstraction has 511 states and 737 transitions. [2021-11-25 19:10:35,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:10:35,311 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 737 transitions. [2021-11-25 19:10:35,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-25 19:10:35,313 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:10:35,313 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] [2021-11-25 19:10:35,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-25 19:10:35,314 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:10:35,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:10:35,314 INFO L85 PathProgramCache]: Analyzing trace with hash 566758579, now seen corresponding path program 1 times [2021-11-25 19:10:35,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:10:35,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196771125] [2021-11-25 19:10:35,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:10:35,315 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:10:35,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:10:35,489 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-25 19:10:35,489 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:10:35,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196771125] [2021-11-25 19:10:35,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196771125] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:10:35,490 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:10:35,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:10:35,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961609637] [2021-11-25 19:10:35,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:10:35,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:10:35,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:10:35,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:10:35,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:10:35,492 INFO L87 Difference]: Start difference. First operand 511 states and 737 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) [2021-11-25 19:10:37,502 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:10:37,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:10:37,873 INFO L93 Difference]: Finished difference Result 1065 states and 1535 transitions. [2021-11-25 19:10:37,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:10:37,873 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 134 [2021-11-25 19:10:37,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:10:37,877 INFO L225 Difference]: With dead ends: 1065 [2021-11-25 19:10:37,877 INFO L226 Difference]: Without dead ends: 564 [2021-11-25 19:10:37,878 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 [2021-11-25 19:10:37,879 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 73 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 39 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-25 19:10:37,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 246 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 237 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-25 19:10:37,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2021-11-25 19:10:37,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 513. [2021-11-25 19:10:37,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 513 states, 512 states have (on average 1.4453125) internal successors, (740), 512 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:10:37,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 740 transitions. [2021-11-25 19:10:37,899 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 740 transitions. Word has length 134 [2021-11-25 19:10:37,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:10:37,899 INFO L470 AbstractCegarLoop]: Abstraction has 513 states and 740 transitions. [2021-11-25 19:10:37,899 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) [2021-11-25 19:10:37,899 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 740 transitions. [2021-11-25 19:10:37,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-25 19:10:37,902 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:10:37,902 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, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:10:37,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-25 19:10:37,902 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:10:37,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:10:37,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1353847669, now seen corresponding path program 1 times [2021-11-25 19:10:37,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:10:37,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569070421] [2021-11-25 19:10:37,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:10:37,903 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:10:38,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:10:38,132 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 138 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-25 19:10:38,132 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:10:38,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569070421] [2021-11-25 19:10:38,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569070421] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:10:38,133 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:10:38,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 19:10:38,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122173418] [2021-11-25 19:10:38,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:10:38,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 19:10:38,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:10:38,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 19:10:38,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-25 19:10:38,135 INFO L87 Difference]: Start difference. First operand 513 states and 740 transitions. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:10:40,145 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:10:40,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:10:40,565 INFO L93 Difference]: Finished difference Result 1032 states and 1489 transitions. [2021-11-25 19:10:40,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 19:10:40,566 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 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 134 [2021-11-25 19:10:40,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:10:40,569 INFO L225 Difference]: With dead ends: 1032 [2021-11-25 19:10:40,569 INFO L226 Difference]: Without dead ends: 531 [2021-11-25 19:10:40,570 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 [2021-11-25 19:10:40,570 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 87 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-25 19:10:40,571 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 399 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 336 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-25 19:10:40,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-11-25 19:10:40,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 513. [2021-11-25 19:10:40,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 513 states, 512 states have (on average 1.443359375) internal successors, (739), 512 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:10:40,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 739 transitions. [2021-11-25 19:10:40,590 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 739 transitions. Word has length 134 [2021-11-25 19:10:40,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:10:40,590 INFO L470 AbstractCegarLoop]: Abstraction has 513 states and 739 transitions. [2021-11-25 19:10:40,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:10:40,591 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 739 transitions. [2021-11-25 19:10:40,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-25 19:10:40,593 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:10:40,593 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, 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] [2021-11-25 19:10:40,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-11-25 19:10:40,593 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:10:40,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:10:40,594 INFO L85 PathProgramCache]: Analyzing trace with hash 1222463495, now seen corresponding path program 1 times [2021-11-25 19:10:40,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:10:40,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590837406] [2021-11-25 19:10:40,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:10:40,595 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:10:41,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:10:43,256 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 14 proven. 165 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-25 19:10:43,256 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:10:43,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590837406] [2021-11-25 19:10:43,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590837406] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:10:43,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895672982] [2021-11-25 19:10:43,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:10:43,257 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:10:43,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc266d2-d484-4a40-9be4-fb1ee68b8dac/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:10:43,259 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc266d2-d484-4a40-9be4-fb1ee68b8dac/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:10:43,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc266d2-d484-4a40-9be4-fb1ee68b8dac/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 19:10:44,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:10:44,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 1216 conjuncts, 188 conjunts are in the unsatisfiable core [2021-11-25 19:10:44,392 INFO L286 TraceCheckSpWp]: Computing forward predicates...