./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/openssl/s3_srvr.blast.10.i.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.10.i.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 06e766f2b0fb57f78717a4ab927a7f5c398a4eef6e5769d710eaeddfb253f7dd --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 22:51:38,083 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 22:51:38,086 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 22:51:38,124 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 22:51:38,124 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 22:51:38,126 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 22:51:38,128 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 22:51:38,130 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 22:51:38,133 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 22:51:38,134 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 22:51:38,135 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 22:51:38,137 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 22:51:38,137 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 22:51:38,139 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 22:51:38,140 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 22:51:38,142 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 22:51:38,143 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 22:51:38,144 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 22:51:38,147 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 22:51:38,149 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 22:51:38,151 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 22:51:38,153 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 22:51:38,155 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 22:51:38,156 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 22:51:38,160 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 22:51:38,160 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 22:51:38,161 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 22:51:38,162 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 22:51:38,163 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 22:51:38,164 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 22:51:38,164 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 22:51:38,165 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 22:51:38,166 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 22:51:38,167 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 22:51:38,168 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 22:51:38,169 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 22:51:38,170 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 22:51:38,170 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 22:51:38,171 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 22:51:38,172 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 22:51:38,173 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 22:51:38,174 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-20 22:51:38,200 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 22:51:38,201 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 22:51:38,201 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 22:51:38,201 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 22:51:38,202 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 22:51:38,202 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 22:51:38,203 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-20 22:51:38,203 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-20 22:51:38,203 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-20 22:51:38,204 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-20 22:51:38,204 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-20 22:51:38,204 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-20 22:51:38,204 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-20 22:51:38,205 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-20 22:51:38,205 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-20 22:51:38,205 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-20 22:51:38,206 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-20 22:51:38,206 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-20 22:51:38,207 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 22:51:38,207 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 22:51:38,207 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 22:51:38,207 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 22:51:38,208 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 22:51:38,208 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 22:51:38,208 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 22:51:38,208 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 22:51:38,209 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 22:51:38,209 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 22:51:38,209 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 22:51:38,209 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 22:51:38,210 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 22:51:38,210 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 22:51:38,210 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 22:51:38,210 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 22:51:38,211 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 22:51:38,211 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 22:51:38,211 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-20 22:51:38,211 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 22:51:38,212 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 22:51:38,212 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 22:51:38,212 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 22:51:38,212 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_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 06e766f2b0fb57f78717a4ab927a7f5c398a4eef6e5769d710eaeddfb253f7dd [2021-11-20 22:51:38,493 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 22:51:38,515 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 22:51:38,517 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 22:51:38,519 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 22:51:38,519 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 22:51:38,521 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/openssl/s3_srvr.blast.10.i.cil-2.c [2021-11-20 22:51:38,585 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/data/ac20724b8/1e0dbf976ed445219bef08c0755db088/FLAG7f5556188 [2021-11-20 22:51:39,221 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 22:51:39,221 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/sv-benchmarks/c/openssl/s3_srvr.blast.10.i.cil-2.c [2021-11-20 22:51:39,255 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/data/ac20724b8/1e0dbf976ed445219bef08c0755db088/FLAG7f5556188 [2021-11-20 22:51:39,390 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/data/ac20724b8/1e0dbf976ed445219bef08c0755db088 [2021-11-20 22:51:39,394 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 22:51:39,396 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 22:51:39,400 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 22:51:39,400 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 22:51:39,403 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 22:51:39,404 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:51:39" (1/1) ... [2021-11-20 22:51:39,407 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75d25bd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:51:39, skipping insertion in model container [2021-11-20 22:51:39,408 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:51:39" (1/1) ... [2021-11-20 22:51:39,415 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 22:51:39,496 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 22:51:39,997 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_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/sv-benchmarks/c/openssl/s3_srvr.blast.10.i.cil-2.c[73311,73324] [2021-11-20 22:51:40,006 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 22:51:40,020 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 22:51:40,141 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_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/sv-benchmarks/c/openssl/s3_srvr.blast.10.i.cil-2.c[73311,73324] [2021-11-20 22:51:40,144 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 22:51:40,161 INFO L208 MainTranslator]: Completed translation [2021-11-20 22:51:40,162 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:51:40 WrapperNode [2021-11-20 22:51:40,162 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 22:51:40,163 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 22:51:40,171 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 22:51:40,172 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 22:51:40,180 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:51:40" (1/1) ... [2021-11-20 22:51:40,223 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:51:40" (1/1) ... [2021-11-20 22:51:40,305 INFO L137 Inliner]: procedures = 31, calls = 223, calls flagged for inlining = 7, calls inlined = 3, statements flattened = 787 [2021-11-20 22:51:40,307 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 22:51:40,308 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 22:51:40,308 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 22:51:40,309 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 22:51:40,318 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:51:40" (1/1) ... [2021-11-20 22:51:40,319 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:51:40" (1/1) ... [2021-11-20 22:51:40,347 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:51:40" (1/1) ... [2021-11-20 22:51:40,347 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:51:40" (1/1) ... [2021-11-20 22:51:40,389 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:51:40" (1/1) ... [2021-11-20 22:51:40,396 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:51:40" (1/1) ... [2021-11-20 22:51:40,400 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:51:40" (1/1) ... [2021-11-20 22:51:40,406 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 22:51:40,407 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 22:51:40,407 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 22:51:40,408 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 22:51:40,409 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:51:40" (1/1) ... [2021-11-20 22:51:40,416 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 22:51:40,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:51:40,455 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 22:51:40,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 22:51:40,503 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 22:51:40,504 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-20 22:51:40,504 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 22:51:40,504 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 22:51:40,504 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-20 22:51:40,504 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 22:51:40,505 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 22:51:40,505 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 22:51:40,505 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 22:51:40,704 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 22:51:40,706 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 22:51:40,742 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-20 22:51:43,816 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2021-11-20 22:51:43,816 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2021-11-20 22:51:43,817 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 22:51:44,300 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 22:51:44,300 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-20 22:51:44,306 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:51:44 BoogieIcfgContainer [2021-11-20 22:51:44,306 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 22:51:44,310 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 22:51:44,310 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 22:51:44,314 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 22:51:44,314 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 10:51:39" (1/3) ... [2021-11-20 22:51:44,315 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f4c096b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:51:44, skipping insertion in model container [2021-11-20 22:51:44,316 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:51:40" (2/3) ... [2021-11-20 22:51:44,316 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f4c096b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:51:44, skipping insertion in model container [2021-11-20 22:51:44,317 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:51:44" (3/3) ... [2021-11-20 22:51:44,318 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.10.i.cil-2.c [2021-11-20 22:51:44,324 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 22:51:44,325 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 22:51:44,397 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 22:51:44,417 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 22:51:44,417 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 22:51:44,442 INFO L276 IsEmpty]: Start isEmpty. Operand has 108 states, 106 states have (on average 1.7547169811320755) internal successors, (186), 107 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:51:44,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-20 22:51:44,454 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:51:44,455 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] [2021-11-20 22:51:44,455 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:51:44,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:51:44,462 INFO L85 PathProgramCache]: Analyzing trace with hash 1570304419, now seen corresponding path program 1 times [2021-11-20 22:51:44,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:51:44,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790399145] [2021-11-20 22:51:44,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:51:44,474 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:51:44,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:51:44,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:51:44,926 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:51:44,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790399145] [2021-11-20 22:51:44,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790399145] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:51:44,927 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:51:44,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 22:51:44,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51819704] [2021-11-20 22:51:44,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:51:44,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:51:44,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:51:44,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:51:44,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:51:44,964 INFO L87 Difference]: Start difference. First operand has 108 states, 106 states have (on average 1.7547169811320755) internal successors, (186), 107 states have internal predecessors, (186), 0 states have call successors, (0), 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 8.75) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:51:46,991 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:51:47,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:51:47,536 INFO L93 Difference]: Finished difference Result 239 states and 412 transitions. [2021-11-20 22:51:47,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:51:47,539 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 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 35 [2021-11-20 22:51:47,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:51:47,548 INFO L225 Difference]: With dead ends: 239 [2021-11-20 22:51:47,549 INFO L226 Difference]: Without dead ends: 127 [2021-11-20 22:51:47,551 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:51:47,554 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 20 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 11 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-20 22:51:47,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 393 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 154 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2021-11-20 22:51:47,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-11-20 22:51:47,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 115. [2021-11-20 22:51:47,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.5350877192982457) internal successors, (175), 114 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:51:47,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 175 transitions. [2021-11-20 22:51:47,599 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 175 transitions. Word has length 35 [2021-11-20 22:51:47,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:51:47,599 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 175 transitions. [2021-11-20 22:51:47,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:51:47,600 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 175 transitions. [2021-11-20 22:51:47,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-20 22:51:47,602 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:51:47,603 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] [2021-11-20 22:51:47,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 22:51:47,603 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:51:47,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:51:47,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1380198930, now seen corresponding path program 1 times [2021-11-20 22:51:47,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:51:47,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795139471] [2021-11-20 22:51:47,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:51:47,605 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:51:47,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:51:47,706 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:51:47,706 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:51:47,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795139471] [2021-11-20 22:51:47,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795139471] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:51:47,707 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:51:47,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 22:51:47,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051174500] [2021-11-20 22:51:47,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:51:47,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:51:47,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:51:47,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:51:47,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:51:47,710 INFO L87 Difference]: Start difference. First operand 115 states and 175 transitions. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:51:49,723 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:51:50,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:51:50,195 INFO L93 Difference]: Finished difference Result 230 states and 344 transitions. [2021-11-20 22:51:50,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:51:50,196 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 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 45 [2021-11-20 22:51:50,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:51:50,198 INFO L225 Difference]: With dead ends: 230 [2021-11-20 22:51:50,198 INFO L226 Difference]: Without dead ends: 127 [2021-11-20 22:51:50,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:51:50,201 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 19 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-20 22:51:50,201 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 325 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 142 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2021-11-20 22:51:50,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-11-20 22:51:50,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 115. [2021-11-20 22:51:50,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.5263157894736843) internal successors, (174), 114 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:51:50,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 174 transitions. [2021-11-20 22:51:50,213 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 174 transitions. Word has length 45 [2021-11-20 22:51:50,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:51:50,214 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 174 transitions. [2021-11-20 22:51:50,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:51:50,214 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 174 transitions. [2021-11-20 22:51:50,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-20 22:51:50,221 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:51:50,222 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] [2021-11-20 22:51:50,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 22:51:50,223 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:51:50,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:51:50,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1912063153, now seen corresponding path program 1 times [2021-11-20 22:51:50,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:51:50,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845001745] [2021-11-20 22:51:50,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:51:50,225 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:51:50,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:51:50,386 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:51:50,387 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:51:50,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845001745] [2021-11-20 22:51:50,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845001745] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:51:50,388 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:51:50,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 22:51:50,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830531352] [2021-11-20 22:51:50,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:51:50,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:51:50,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:51:50,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:51:50,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:51:50,390 INFO L87 Difference]: Start difference. First operand 115 states and 174 transitions. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:51:52,402 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:51:52,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:51:52,766 INFO L93 Difference]: Finished difference Result 230 states and 343 transitions. [2021-11-20 22:51:52,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:51:52,767 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 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 46 [2021-11-20 22:51:52,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:51:52,770 INFO L225 Difference]: With dead ends: 230 [2021-11-20 22:51:52,770 INFO L226 Difference]: Without dead ends: 127 [2021-11-20 22:51:52,771 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:51:52,773 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 17 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 22:51:52,773 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 324 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 143 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-20 22:51:52,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-11-20 22:51:52,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 115. [2021-11-20 22:51:52,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.5175438596491229) internal successors, (173), 114 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:51:52,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 173 transitions. [2021-11-20 22:51:52,786 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 173 transitions. Word has length 46 [2021-11-20 22:51:52,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:51:52,787 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 173 transitions. [2021-11-20 22:51:52,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:51:52,787 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 173 transitions. [2021-11-20 22:51:52,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-20 22:51:52,788 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:51:52,789 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] [2021-11-20 22:51:52,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 22:51:52,789 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:51:52,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:51:52,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1032674003, now seen corresponding path program 1 times [2021-11-20 22:51:52,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:51:52,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703928279] [2021-11-20 22:51:52,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:51:52,790 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:51:52,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:51:52,900 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:51:52,901 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:51:52,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703928279] [2021-11-20 22:51:52,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703928279] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:51:52,903 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:51:52,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 22:51:52,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344887513] [2021-11-20 22:51:52,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:51:52,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:51:52,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:51:52,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:51:52,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:51:52,908 INFO L87 Difference]: Start difference. First operand 115 states and 173 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) [2021-11-20 22:51:54,927 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:51:55,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:51:55,255 INFO L93 Difference]: Finished difference Result 230 states and 342 transitions. [2021-11-20 22:51:55,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:51:55,256 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 [2021-11-20 22:51:55,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:51:55,258 INFO L225 Difference]: With dead ends: 230 [2021-11-20 22:51:55,258 INFO L226 Difference]: Without dead ends: 127 [2021-11-20 22:51:55,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:51:55,260 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 15 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 22:51:55,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 324 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 143 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 22:51:55,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-11-20 22:51:55,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 115. [2021-11-20 22:51:55,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.5087719298245614) internal successors, (172), 114 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:51:55,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 172 transitions. [2021-11-20 22:51:55,270 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 172 transitions. Word has length 47 [2021-11-20 22:51:55,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:51:55,271 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 172 transitions. [2021-11-20 22:51:55,271 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) [2021-11-20 22:51:55,271 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 172 transitions. [2021-11-20 22:51:55,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-20 22:51:55,273 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:51:55,273 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] [2021-11-20 22:51:55,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 22:51:55,274 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:51:55,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:51:55,275 INFO L85 PathProgramCache]: Analyzing trace with hash -6957746, now seen corresponding path program 1 times [2021-11-20 22:51:55,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:51:55,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238872544] [2021-11-20 22:51:55,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:51:55,275 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:51:55,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:51:55,371 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:51:55,372 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:51:55,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238872544] [2021-11-20 22:51:55,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238872544] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:51:55,372 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:51:55,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 22:51:55,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178827992] [2021-11-20 22:51:55,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:51:55,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:51:55,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:51:55,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:51:55,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:51:55,375 INFO L87 Difference]: Start difference. First operand 115 states and 172 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) [2021-11-20 22:51:57,387 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:51:57,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:51:57,748 INFO L93 Difference]: Finished difference Result 230 states and 341 transitions. [2021-11-20 22:51:57,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:51:57,750 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 [2021-11-20 22:51:57,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:51:57,751 INFO L225 Difference]: With dead ends: 230 [2021-11-20 22:51:57,752 INFO L226 Difference]: Without dead ends: 127 [2021-11-20 22:51:57,752 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:51:57,754 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 11 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 22:51:57,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 324 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 143 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-20 22:51:57,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-11-20 22:51:57,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 115. [2021-11-20 22:51:57,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.5) internal successors, (171), 114 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:51:57,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 171 transitions. [2021-11-20 22:51:57,764 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 171 transitions. Word has length 47 [2021-11-20 22:51:57,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:51:57,765 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 171 transitions. [2021-11-20 22:51:57,765 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) [2021-11-20 22:51:57,765 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 171 transitions. [2021-11-20 22:51:57,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-20 22:51:57,767 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:51:57,767 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] [2021-11-20 22:51:57,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 22:51:57,768 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:51:57,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:51:57,769 INFO L85 PathProgramCache]: Analyzing trace with hash -2050439799, now seen corresponding path program 1 times [2021-11-20 22:51:57,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:51:57,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966150934] [2021-11-20 22:51:57,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:51:57,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:51:57,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:51:57,839 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:51:57,840 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:51:57,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966150934] [2021-11-20 22:51:57,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966150934] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:51:57,840 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:51:57,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 22:51:57,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584768731] [2021-11-20 22:51:57,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:51:57,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:51:57,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:51:57,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:51:57,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:51:57,842 INFO L87 Difference]: Start difference. First operand 115 states and 171 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) [2021-11-20 22:51:59,859 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:52:00,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:52:00,168 INFO L93 Difference]: Finished difference Result 230 states and 340 transitions. [2021-11-20 22:52:00,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:52:00,169 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 [2021-11-20 22:52:00,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:52:00,171 INFO L225 Difference]: With dead ends: 230 [2021-11-20 22:52:00,171 INFO L226 Difference]: Without dead ends: 127 [2021-11-20 22:52:00,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:52:00,173 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 9 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 22:52:00,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 325 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 142 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 22:52:00,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-11-20 22:52:00,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 115. [2021-11-20 22:52:00,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.4912280701754386) internal successors, (170), 114 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:52:00,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 170 transitions. [2021-11-20 22:52:00,182 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 170 transitions. Word has length 47 [2021-11-20 22:52:00,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:52:00,182 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 170 transitions. [2021-11-20 22:52:00,182 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) [2021-11-20 22:52:00,183 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 170 transitions. [2021-11-20 22:52:00,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-20 22:52:00,184 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:52:00,184 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] [2021-11-20 22:52:00,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-20 22:52:00,185 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:52:00,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:52:00,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1126985106, now seen corresponding path program 1 times [2021-11-20 22:52:00,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:52:00,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574477687] [2021-11-20 22:52:00,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:52:00,186 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:52:00,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:52:00,250 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:52:00,251 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:52:00,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574477687] [2021-11-20 22:52:00,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574477687] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:52:00,251 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:52:00,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 22:52:00,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569897841] [2021-11-20 22:52:00,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:52:00,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:52:00,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:52:00,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:52:00,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:52:00,253 INFO L87 Difference]: Start difference. First operand 115 states and 170 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) [2021-11-20 22:52:02,269 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:52:02,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:52:02,585 INFO L93 Difference]: Finished difference Result 228 states and 337 transitions. [2021-11-20 22:52:02,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:52:02,586 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 [2021-11-20 22:52:02,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:52:02,592 INFO L225 Difference]: With dead ends: 228 [2021-11-20 22:52:02,592 INFO L226 Difference]: Without dead ends: 125 [2021-11-20 22:52:02,592 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:52:02,593 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 9 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 22:52:02,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 328 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 139 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 22:52:02,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-11-20 22:52:02,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 115. [2021-11-20 22:52:02,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.4824561403508771) internal successors, (169), 114 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:52:02,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 169 transitions. [2021-11-20 22:52:02,610 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 169 transitions. Word has length 48 [2021-11-20 22:52:02,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:52:02,610 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 169 transitions. [2021-11-20 22:52:02,611 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) [2021-11-20 22:52:02,611 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 169 transitions. [2021-11-20 22:52:02,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-20 22:52:02,612 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:52:02,612 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] [2021-11-20 22:52:02,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-20 22:52:02,613 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:52:02,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:52:02,613 INFO L85 PathProgramCache]: Analyzing trace with hash -1504846388, now seen corresponding path program 1 times [2021-11-20 22:52:02,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:52:02,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888955792] [2021-11-20 22:52:02,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:52:02,614 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:52:02,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:52:02,726 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:52:02,727 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:52:02,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888955792] [2021-11-20 22:52:02,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888955792] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:52:02,727 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:52:02,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 22:52:02,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126216522] [2021-11-20 22:52:02,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:52:02,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:52:02,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:52:02,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:52:02,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:52:02,730 INFO L87 Difference]: Start difference. First operand 115 states and 169 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) [2021-11-20 22:52:04,748 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:52:05,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:52:05,064 INFO L93 Difference]: Finished difference Result 228 states and 336 transitions. [2021-11-20 22:52:05,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:52:05,066 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 [2021-11-20 22:52:05,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:52:05,067 INFO L225 Difference]: With dead ends: 228 [2021-11-20 22:52:05,067 INFO L226 Difference]: Without dead ends: 125 [2021-11-20 22:52:05,067 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:52:05,068 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 11 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 22:52:05,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 328 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 139 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 22:52:05,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-11-20 22:52:05,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 115. [2021-11-20 22:52:05,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.4736842105263157) internal successors, (168), 114 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:52:05,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 168 transitions. [2021-11-20 22:52:05,077 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 168 transitions. Word has length 48 [2021-11-20 22:52:05,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:52:05,077 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 168 transitions. [2021-11-20 22:52:05,078 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) [2021-11-20 22:52:05,078 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 168 transitions. [2021-11-20 22:52:05,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-20 22:52:05,079 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:52:05,079 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] [2021-11-20 22:52:05,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-20 22:52:05,079 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:52:05,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:52:05,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1658045096, now seen corresponding path program 1 times [2021-11-20 22:52:05,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:52:05,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379956969] [2021-11-20 22:52:05,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:52:05,081 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:52:05,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:52:05,143 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:52:05,143 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:52:05,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379956969] [2021-11-20 22:52:05,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379956969] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:52:05,144 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:52:05,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 22:52:05,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794880521] [2021-11-20 22:52:05,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:52:05,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:52:05,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:52:05,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:52:05,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:52:05,146 INFO L87 Difference]: Start difference. First operand 115 states and 168 transitions. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:52:06,798 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:52:08,821 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:52:09,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:52:09,115 INFO L93 Difference]: Finished difference Result 220 states and 325 transitions. [2021-11-20 22:52:09,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:52:09,116 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-11-20 22:52:09,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:52:09,117 INFO L225 Difference]: With dead ends: 220 [2021-11-20 22:52:09,118 INFO L226 Difference]: Without dead ends: 117 [2021-11-20 22:52:09,118 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:52:09,119 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 5 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2021-11-20 22:52:09,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 338 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 130 Invalid, 1 Unknown, 0 Unchecked, 3.9s Time] [2021-11-20 22:52:09,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-11-20 22:52:09,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 115. [2021-11-20 22:52:09,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.4649122807017543) internal successors, (167), 114 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:52:09,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 167 transitions. [2021-11-20 22:52:09,125 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 167 transitions. Word has length 49 [2021-11-20 22:52:09,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:52:09,126 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 167 transitions. [2021-11-20 22:52:09,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:52:09,126 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 167 transitions. [2021-11-20 22:52:09,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-20 22:52:09,127 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:52:09,127 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] [2021-11-20 22:52:09,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-20 22:52:09,127 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:52:09,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:52:09,128 INFO L85 PathProgramCache]: Analyzing trace with hash -974103786, now seen corresponding path program 1 times [2021-11-20 22:52:09,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:52:09,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889171201] [2021-11-20 22:52:09,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:52:09,129 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:52:09,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:52:09,195 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:52:09,196 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:52:09,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889171201] [2021-11-20 22:52:09,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889171201] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:52:09,196 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:52:09,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 22:52:09,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888895314] [2021-11-20 22:52:09,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:52:09,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:52:09,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:52:09,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:52:09,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:52:09,199 INFO L87 Difference]: Start difference. First operand 115 states and 167 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:52:11,212 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:52:11,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:52:11,565 INFO L93 Difference]: Finished difference Result 252 states and 373 transitions. [2021-11-20 22:52:11,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:52:11,566 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-11-20 22:52:11,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:52:11,568 INFO L225 Difference]: With dead ends: 252 [2021-11-20 22:52:11,568 INFO L226 Difference]: Without dead ends: 149 [2021-11-20 22:52:11,568 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:52:11,569 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 21 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 22:52:11,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 333 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 158 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 22:52:11,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-11-20 22:52:11,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 135. [2021-11-20 22:52:11,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 1.5) internal successors, (201), 134 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:52:11,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 201 transitions. [2021-11-20 22:52:11,578 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 201 transitions. Word has length 50 [2021-11-20 22:52:11,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:52:11,578 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 201 transitions. [2021-11-20 22:52:11,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:52:11,579 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 201 transitions. [2021-11-20 22:52:11,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-20 22:52:11,581 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:52:11,581 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:52:11,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-20 22:52:11,582 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:52:11,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:52:11,583 INFO L85 PathProgramCache]: Analyzing trace with hash -2057286751, now seen corresponding path program 1 times [2021-11-20 22:52:11,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:52:11,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972455372] [2021-11-20 22:52:11,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:52:11,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:52:11,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:52:11,689 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:52:11,689 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:52:11,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972455372] [2021-11-20 22:52:11,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972455372] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:52:11,690 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:52:11,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 22:52:11,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839849608] [2021-11-20 22:52:11,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:52:11,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:52:11,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:52:11,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:52:11,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:52:11,692 INFO L87 Difference]: Start difference. First operand 135 states and 201 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:52:13,703 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:52:14,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:52:14,107 INFO L93 Difference]: Finished difference Result 272 states and 406 transitions. [2021-11-20 22:52:14,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:52:14,109 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 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 60 [2021-11-20 22:52:14,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:52:14,110 INFO L225 Difference]: With dead ends: 272 [2021-11-20 22:52:14,111 INFO L226 Difference]: Without dead ends: 149 [2021-11-20 22:52:14,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:52:14,112 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 32 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 22:52:14,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 335 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 155 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-20 22:52:14,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-11-20 22:52:14,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 135. [2021-11-20 22:52:14,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 1.492537313432836) internal successors, (200), 134 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:52:14,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 200 transitions. [2021-11-20 22:52:14,119 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 200 transitions. Word has length 60 [2021-11-20 22:52:14,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:52:14,120 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 200 transitions. [2021-11-20 22:52:14,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:52:14,120 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 200 transitions. [2021-11-20 22:52:14,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-20 22:52:14,121 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:52:14,122 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:52:14,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-20 22:52:14,122 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:52:14,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:52:14,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1897790114, now seen corresponding path program 1 times [2021-11-20 22:52:14,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:52:14,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146609805] [2021-11-20 22:52:14,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:52:14,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:52:14,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:52:14,227 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 22:52:14,227 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:52:14,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146609805] [2021-11-20 22:52:14,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146609805] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:52:14,227 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:52:14,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 22:52:14,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535168263] [2021-11-20 22:52:14,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:52:14,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 22:52:14,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:52:14,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 22:52:14,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:52:14,230 INFO L87 Difference]: Start difference. First operand 135 states and 200 transitions. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:52:16,242 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:52:16,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:52:16,694 INFO L93 Difference]: Finished difference Result 275 states and 411 transitions. [2021-11-20 22:52:16,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 22:52:16,695 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 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 61 [2021-11-20 22:52:16,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:52:16,696 INFO L225 Difference]: With dead ends: 275 [2021-11-20 22:52:16,697 INFO L226 Difference]: Without dead ends: 152 [2021-11-20 22:52:16,697 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-20 22:52:16,698 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 116 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 32 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 22:52:16,698 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 234 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 262 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-20 22:52:16,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-11-20 22:52:16,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 151. [2021-11-20 22:52:16,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.4666666666666666) internal successors, (220), 150 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:52:16,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 220 transitions. [2021-11-20 22:52:16,706 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 220 transitions. Word has length 61 [2021-11-20 22:52:16,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:52:16,706 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 220 transitions. [2021-11-20 22:52:16,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:52:16,706 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 220 transitions. [2021-11-20 22:52:16,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-20 22:52:16,707 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:52:16,708 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:52:16,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-20 22:52:16,708 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:52:16,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:52:16,709 INFO L85 PathProgramCache]: Analyzing trace with hash -240039555, now seen corresponding path program 1 times [2021-11-20 22:52:16,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:52:16,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230449986] [2021-11-20 22:52:16,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:52:16,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:52:16,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:52:16,773 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:52:16,773 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:52:16,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230449986] [2021-11-20 22:52:16,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230449986] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:52:16,774 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:52:16,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 22:52:16,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99750899] [2021-11-20 22:52:16,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:52:16,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:52:16,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:52:16,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:52:16,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:52:16,776 INFO L87 Difference]: Start difference. First operand 151 states and 220 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:52:18,788 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:52:19,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:52:19,122 INFO L93 Difference]: Finished difference Result 304 states and 443 transitions. [2021-11-20 22:52:19,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:52:19,124 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 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 62 [2021-11-20 22:52:19,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:52:19,125 INFO L225 Difference]: With dead ends: 304 [2021-11-20 22:52:19,125 INFO L226 Difference]: Without dead ends: 165 [2021-11-20 22:52:19,126 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:52:19,126 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 30 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 22:52:19,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 335 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 155 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 22:52:19,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-11-20 22:52:19,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 151. [2021-11-20 22:52:19,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.46) internal successors, (219), 150 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:52:19,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 219 transitions. [2021-11-20 22:52:19,135 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 219 transitions. Word has length 62 [2021-11-20 22:52:19,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:52:19,136 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 219 transitions. [2021-11-20 22:52:19,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:52:19,136 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 219 transitions. [2021-11-20 22:52:19,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-20 22:52:19,137 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:52:19,137 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:52:19,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-20 22:52:19,138 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:52:19,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:52:19,138 INFO L85 PathProgramCache]: Analyzing trace with hash 2146675265, now seen corresponding path program 1 times [2021-11-20 22:52:19,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:52:19,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568446566] [2021-11-20 22:52:19,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:52:19,139 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:52:19,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:52:19,224 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:52:19,224 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:52:19,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568446566] [2021-11-20 22:52:19,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568446566] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:52:19,225 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:52:19,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 22:52:19,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925539418] [2021-11-20 22:52:19,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:52:19,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:52:19,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:52:19,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:52:19,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:52:19,227 INFO L87 Difference]: Start difference. First operand 151 states and 219 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:52:21,239 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:52:21,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:52:21,563 INFO L93 Difference]: Finished difference Result 304 states and 441 transitions. [2021-11-20 22:52:21,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:52:21,565 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 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 62 [2021-11-20 22:52:21,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:52:21,567 INFO L225 Difference]: With dead ends: 304 [2021-11-20 22:52:21,567 INFO L226 Difference]: Without dead ends: 165 [2021-11-20 22:52:21,567 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:52:21,568 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 25 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 22:52:21,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 335 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 155 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 22:52:21,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-11-20 22:52:21,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 151. [2021-11-20 22:52:21,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.4533333333333334) internal successors, (218), 150 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:52:21,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 218 transitions. [2021-11-20 22:52:21,577 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 218 transitions. Word has length 62 [2021-11-20 22:52:21,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:52:21,577 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 218 transitions. [2021-11-20 22:52:21,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:52:21,578 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 218 transitions. [2021-11-20 22:52:21,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-20 22:52:21,579 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:52:21,579 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:52:21,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-20 22:52:21,579 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:52:21,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:52:21,580 INFO L85 PathProgramCache]: Analyzing trace with hash 103193212, now seen corresponding path program 1 times [2021-11-20 22:52:21,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:52:21,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820074355] [2021-11-20 22:52:21,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:52:21,581 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:52:21,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:52:21,646 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:52:21,646 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:52:21,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820074355] [2021-11-20 22:52:21,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820074355] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:52:21,646 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:52:21,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 22:52:21,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346502877] [2021-11-20 22:52:21,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:52:21,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:52:21,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:52:21,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:52:21,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:52:21,649 INFO L87 Difference]: Start difference. First operand 151 states and 218 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:52:23,661 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:52:24,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:52:24,003 INFO L93 Difference]: Finished difference Result 304 states and 439 transitions. [2021-11-20 22:52:24,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:52:24,004 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 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 62 [2021-11-20 22:52:24,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:52:24,006 INFO L225 Difference]: With dead ends: 304 [2021-11-20 22:52:24,006 INFO L226 Difference]: Without dead ends: 165 [2021-11-20 22:52:24,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:52:24,007 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 23 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 22:52:24,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 336 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 154 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 22:52:24,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-11-20 22:52:24,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 151. [2021-11-20 22:52:24,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.4466666666666668) internal successors, (217), 150 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:52:24,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 217 transitions. [2021-11-20 22:52:24,016 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 217 transitions. Word has length 62 [2021-11-20 22:52:24,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:52:24,016 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 217 transitions. [2021-11-20 22:52:24,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:52:24,016 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 217 transitions. [2021-11-20 22:52:24,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-20 22:52:24,017 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:52:24,018 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:52:24,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-20 22:52:24,018 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:52:24,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:52:24,019 INFO L85 PathProgramCache]: Analyzing trace with hash -1148097285, now seen corresponding path program 1 times [2021-11-20 22:52:24,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:52:24,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580937800] [2021-11-20 22:52:24,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:52:24,020 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:52:24,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:52:24,083 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:52:24,083 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:52:24,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580937800] [2021-11-20 22:52:24,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580937800] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:52:24,084 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:52:24,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 22:52:24,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043895036] [2021-11-20 22:52:24,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:52:24,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:52:24,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:52:24,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:52:24,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:52:24,086 INFO L87 Difference]: Start difference. First operand 151 states and 217 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:52:26,099 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:52:26,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:52:26,436 INFO L93 Difference]: Finished difference Result 304 states and 437 transitions. [2021-11-20 22:52:26,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:52:26,437 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 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 63 [2021-11-20 22:52:26,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:52:26,439 INFO L225 Difference]: With dead ends: 304 [2021-11-20 22:52:26,439 INFO L226 Difference]: Without dead ends: 165 [2021-11-20 22:52:26,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:52:26,440 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 27 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 22:52:26,441 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 335 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 155 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 22:52:26,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-11-20 22:52:26,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 151. [2021-11-20 22:52:26,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.44) internal successors, (216), 150 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:52:26,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 216 transitions. [2021-11-20 22:52:26,449 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 216 transitions. Word has length 63 [2021-11-20 22:52:26,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:52:26,449 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 216 transitions. [2021-11-20 22:52:26,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:52:26,450 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 216 transitions. [2021-11-20 22:52:26,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-20 22:52:26,451 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:52:26,451 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:52:26,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-20 22:52:26,451 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:52:26,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:52:26,452 INFO L85 PathProgramCache]: Analyzing trace with hash -829868289, now seen corresponding path program 1 times [2021-11-20 22:52:26,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:52:26,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657847861] [2021-11-20 22:52:26,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:52:26,453 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:52:26,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:52:26,539 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:52:26,539 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:52:26,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657847861] [2021-11-20 22:52:26,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657847861] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:52:26,540 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:52:26,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 22:52:26,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763803232] [2021-11-20 22:52:26,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:52:26,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:52:26,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:52:26,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:52:26,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:52:26,542 INFO L87 Difference]: Start difference. First operand 151 states and 216 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:52:28,482 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.94s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:52:30,504 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:52:32,524 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:52:32,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:52:32,832 INFO L93 Difference]: Finished difference Result 302 states and 433 transitions. [2021-11-20 22:52:32,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:52:32,833 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 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 63 [2021-11-20 22:52:32,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:52:32,835 INFO L225 Difference]: With dead ends: 302 [2021-11-20 22:52:32,835 INFO L226 Difference]: Without dead ends: 163 [2021-11-20 22:52:32,835 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:52:32,836 INFO L933 BasicCegarLoop]: 134 mSDtfsCounter, 22 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 7 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2021-11-20 22:52:32,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 339 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 152 Invalid, 2 Unknown, 0 Unchecked, 6.3s Time] [2021-11-20 22:52:32,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-11-20 22:52:32,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 151. [2021-11-20 22:52:32,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.4333333333333333) internal successors, (215), 150 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:52:32,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 215 transitions. [2021-11-20 22:52:32,845 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 215 transitions. Word has length 63 [2021-11-20 22:52:32,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:52:32,845 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 215 transitions. [2021-11-20 22:52:32,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:52:32,845 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 215 transitions. [2021-11-20 22:52:32,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-20 22:52:32,846 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:52:32,847 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:52:32,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-20 22:52:32,847 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:52:32,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:52:32,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1476599038, now seen corresponding path program 1 times [2021-11-20 22:52:32,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:52:32,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807488119] [2021-11-20 22:52:32,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:52:32,849 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:52:32,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:52:32,925 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:52:32,926 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:52:32,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807488119] [2021-11-20 22:52:32,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807488119] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:52:32,926 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:52:32,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 22:52:32,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332365108] [2021-11-20 22:52:32,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:52:32,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:52:32,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:52:32,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:52:32,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:52:32,929 INFO L87 Difference]: Start difference. First operand 151 states and 215 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:52:34,942 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:52:35,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:52:35,258 INFO L93 Difference]: Finished difference Result 302 states and 431 transitions. [2021-11-20 22:52:35,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:52:35,259 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-20 22:52:35,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:52:35,260 INFO L225 Difference]: With dead ends: 302 [2021-11-20 22:52:35,261 INFO L226 Difference]: Without dead ends: 163 [2021-11-20 22:52:35,261 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:52:35,262 INFO L933 BasicCegarLoop]: 134 mSDtfsCounter, 24 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 22:52:35,262 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 339 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 151 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 22:52:35,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-11-20 22:52:35,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 151. [2021-11-20 22:52:35,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.4266666666666667) internal successors, (214), 150 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:52:35,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 214 transitions. [2021-11-20 22:52:35,269 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 214 transitions. Word has length 64 [2021-11-20 22:52:35,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:52:35,269 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 214 transitions. [2021-11-20 22:52:35,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:52:35,269 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 214 transitions. [2021-11-20 22:52:35,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-20 22:52:35,270 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:52:35,270 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:52:35,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-20 22:52:35,271 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:52:35,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:52:35,271 INFO L85 PathProgramCache]: Analyzing trace with hash -1018734688, now seen corresponding path program 1 times [2021-11-20 22:52:35,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:52:35,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479851515] [2021-11-20 22:52:35,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:52:35,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:52:35,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:52:35,330 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:52:35,330 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:52:35,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479851515] [2021-11-20 22:52:35,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479851515] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:52:35,331 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:52:35,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 22:52:35,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727499588] [2021-11-20 22:52:35,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:52:35,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:52:35,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:52:35,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:52:35,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:52:35,333 INFO L87 Difference]: Start difference. First operand 151 states and 214 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:52:37,345 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:52:37,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:52:37,701 INFO L93 Difference]: Finished difference Result 294 states and 420 transitions. [2021-11-20 22:52:37,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:52:37,703 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-20 22:52:37,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:52:37,704 INFO L225 Difference]: With dead ends: 294 [2021-11-20 22:52:37,704 INFO L226 Difference]: Without dead ends: 155 [2021-11-20 22:52:37,705 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:52:37,705 INFO L933 BasicCegarLoop]: 138 mSDtfsCounter, 18 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 22:52:37,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 347 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 143 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 22:52:37,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-11-20 22:52:37,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 151. [2021-11-20 22:52:37,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.42) internal successors, (213), 150 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:52:37,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 213 transitions. [2021-11-20 22:52:37,713 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 213 transitions. Word has length 65 [2021-11-20 22:52:37,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:52:37,713 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 213 transitions. [2021-11-20 22:52:37,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:52:37,714 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 213 transitions. [2021-11-20 22:52:37,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-20 22:52:37,714 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:52:37,715 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:52:37,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-20 22:52:37,715 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:52:37,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:52:37,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1964992682, now seen corresponding path program 1 times [2021-11-20 22:52:37,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:52:37,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411664449] [2021-11-20 22:52:37,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:52:37,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:52:37,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:52:37,888 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 22:52:37,888 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:52:37,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411664449] [2021-11-20 22:52:37,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411664449] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:52:37,889 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:52:37,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 22:52:37,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861948904] [2021-11-20 22:52:37,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:52:37,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 22:52:37,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:52:37,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 22:52:37,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 22:52:37,891 INFO L87 Difference]: Start difference. First operand 151 states and 213 transitions. Second operand has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:52:39,904 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:52:40,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:52:40,476 INFO L93 Difference]: Finished difference Result 384 states and 553 transitions. [2021-11-20 22:52:40,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 22:52:40,484 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-20 22:52:40,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:52:40,486 INFO L225 Difference]: With dead ends: 384 [2021-11-20 22:52:40,486 INFO L226 Difference]: Without dead ends: 245 [2021-11-20 22:52:40,486 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-20 22:52:40,487 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 196 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 19 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-20 22:52:40,487 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 371 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 356 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2021-11-20 22:52:40,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-11-20 22:52:40,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 188. [2021-11-20 22:52:40,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 1.4973262032085561) internal successors, (280), 187 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:52:40,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 280 transitions. [2021-11-20 22:52:40,497 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 280 transitions. Word has length 68 [2021-11-20 22:52:40,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:52:40,498 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 280 transitions. [2021-11-20 22:52:40,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:52:40,498 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 280 transitions. [2021-11-20 22:52:40,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-20 22:52:40,499 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:52:40,500 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:52:40,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-20 22:52:40,500 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:52:40,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:52:40,501 INFO L85 PathProgramCache]: Analyzing trace with hash 778698363, now seen corresponding path program 1 times [2021-11-20 22:52:40,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:52:40,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260989458] [2021-11-20 22:52:40,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:52:40,502 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:52:40,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:52:40,619 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 22:52:40,619 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:52:40,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260989458] [2021-11-20 22:52:40,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260989458] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:52:40,620 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:52:40,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 22:52:40,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824111395] [2021-11-20 22:52:40,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:52:40,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 22:52:40,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:52:40,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 22:52:40,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 22:52:40,622 INFO L87 Difference]: Start difference. First operand 188 states and 280 transitions. Second operand has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:52:42,637 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:52:43,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:52:43,326 INFO L93 Difference]: Finished difference Result 416 states and 614 transitions. [2021-11-20 22:52:43,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 22:52:43,327 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-20 22:52:43,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:52:43,329 INFO L225 Difference]: With dead ends: 416 [2021-11-20 22:52:43,329 INFO L226 Difference]: Without dead ends: 240 [2021-11-20 22:52:43,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-20 22:52:43,331 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 141 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 16 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-20 22:52:43,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 371 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 356 Invalid, 1 Unknown, 0 Unchecked, 2.7s Time] [2021-11-20 22:52:43,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-11-20 22:52:43,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 189. [2021-11-20 22:52:43,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 1.4946808510638299) internal successors, (281), 188 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:52:43,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 281 transitions. [2021-11-20 22:52:43,342 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 281 transitions. Word has length 69 [2021-11-20 22:52:43,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:52:43,343 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 281 transitions. [2021-11-20 22:52:43,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:52:43,343 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 281 transitions. [2021-11-20 22:52:43,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-20 22:52:43,344 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:52:43,344 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:52:43,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-20 22:52:43,345 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:52:43,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:52:43,346 INFO L85 PathProgramCache]: Analyzing trace with hash -579561199, now seen corresponding path program 1 times [2021-11-20 22:52:43,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:52:43,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127946151] [2021-11-20 22:52:43,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:52:43,346 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:52:43,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:52:43,495 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-20 22:52:43,495 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:52:43,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127946151] [2021-11-20 22:52:43,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127946151] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:52:43,496 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:52:43,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 22:52:43,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254644547] [2021-11-20 22:52:43,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:52:43,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 22:52:43,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:52:43,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 22:52:43,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:52:43,498 INFO L87 Difference]: Start difference. First operand 189 states and 281 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:52:45,513 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:52:46,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:52:46,020 INFO L93 Difference]: Finished difference Result 466 states and 700 transitions. [2021-11-20 22:52:46,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:52:46,024 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 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 80 [2021-11-20 22:52:46,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:52:46,026 INFO L225 Difference]: With dead ends: 466 [2021-11-20 22:52:46,026 INFO L226 Difference]: Without dead ends: 289 [2021-11-20 22:52:46,027 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-20 22:52:46,028 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 205 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 88 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-20 22:52:46,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 243 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 230 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2021-11-20 22:52:46,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2021-11-20 22:52:46,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 226. [2021-11-20 22:52:46,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 1.5466666666666666) internal successors, (348), 225 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:52:46,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 348 transitions. [2021-11-20 22:52:46,042 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 348 transitions. Word has length 80 [2021-11-20 22:52:46,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:52:46,043 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 348 transitions. [2021-11-20 22:52:46,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:52:46,043 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 348 transitions. [2021-11-20 22:52:46,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-20 22:52:46,045 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:52:46,045 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:52:46,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-20 22:52:46,045 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:52:46,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:52:46,046 INFO L85 PathProgramCache]: Analyzing trace with hash -793060620, now seen corresponding path program 1 times [2021-11-20 22:52:46,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:52:46,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411223573] [2021-11-20 22:52:46,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:52:46,047 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:52:46,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:52:46,184 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-20 22:52:46,184 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:52:46,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411223573] [2021-11-20 22:52:46,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411223573] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:52:46,185 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:52:46,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 22:52:46,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817723927] [2021-11-20 22:52:46,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:52:46,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 22:52:46,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:52:46,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 22:52:46,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:52:46,187 INFO L87 Difference]: Start difference. First operand 226 states and 348 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:52:48,200 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:52:48,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:52:48,704 INFO L93 Difference]: Finished difference Result 531 states and 822 transitions. [2021-11-20 22:52:48,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:52:48,706 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 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 81 [2021-11-20 22:52:48,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:52:48,708 INFO L225 Difference]: With dead ends: 531 [2021-11-20 22:52:48,708 INFO L226 Difference]: Without dead ends: 317 [2021-11-20 22:52:48,709 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-20 22:52:48,709 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 118 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 48 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-20 22:52:48,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 326 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 292 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2021-11-20 22:52:48,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-11-20 22:52:48,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 217. [2021-11-20 22:52:48,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 1.5601851851851851) internal successors, (337), 216 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:52:48,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 337 transitions. [2021-11-20 22:52:48,728 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 337 transitions. Word has length 81 [2021-11-20 22:52:48,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:52:48,729 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 337 transitions. [2021-11-20 22:52:48,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:52:48,729 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 337 transitions. [2021-11-20 22:52:48,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-20 22:52:48,731 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:52:48,731 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:52:48,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-20 22:52:48,731 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:52:48,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:52:48,732 INFO L85 PathProgramCache]: Analyzing trace with hash 413944922, now seen corresponding path program 1 times [2021-11-20 22:52:48,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:52:48,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972648440] [2021-11-20 22:52:48,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:52:48,733 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:52:48,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:52:48,870 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 22:52:48,870 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:52:48,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972648440] [2021-11-20 22:52:48,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972648440] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:52:48,871 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:52:48,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 22:52:48,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515907982] [2021-11-20 22:52:48,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:52:48,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 22:52:48,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:52:48,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 22:52:48,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 22:52:48,873 INFO L87 Difference]: Start difference. First operand 217 states and 337 transitions. Second operand has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:52:50,887 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:52:51,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:52:51,548 INFO L93 Difference]: Finished difference Result 508 states and 790 transitions. [2021-11-20 22:52:51,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 22:52:51,548 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 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 96 [2021-11-20 22:52:51,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:52:51,550 INFO L225 Difference]: With dead ends: 508 [2021-11-20 22:52:51,551 INFO L226 Difference]: Without dead ends: 303 [2021-11-20 22:52:51,551 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-20 22:52:51,552 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 88 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 11 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-11-20 22:52:51,552 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 461 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 452 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2021-11-20 22:52:51,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-11-20 22:52:51,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 247. [2021-11-20 22:52:51,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 1.5853658536585367) internal successors, (390), 246 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:52:51,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 390 transitions. [2021-11-20 22:52:51,565 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 390 transitions. Word has length 96 [2021-11-20 22:52:51,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:52:51,565 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 390 transitions. [2021-11-20 22:52:51,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:52:51,566 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 390 transitions. [2021-11-20 22:52:51,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-20 22:52:51,567 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:52:51,567 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:52:51,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-20 22:52:51,568 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:52:51,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:52:51,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1473024989, now seen corresponding path program 1 times [2021-11-20 22:52:51,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:52:51,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694268064] [2021-11-20 22:52:51,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:52:51,569 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:52:51,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:52:51,679 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 22:52:51,680 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:52:51,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694268064] [2021-11-20 22:52:51,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694268064] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:52:51,680 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:52:51,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 22:52:51,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060943337] [2021-11-20 22:52:51,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:52:51,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 22:52:51,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:52:51,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 22:52:51,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 22:52:51,682 INFO L87 Difference]: Start difference. First operand 247 states and 390 transitions. Second operand has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 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) [2021-11-20 22:52:53,694 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:52:54,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:52:54,326 INFO L93 Difference]: Finished difference Result 538 states and 842 transitions. [2021-11-20 22:52:54,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 22:52:54,327 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 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 101 [2021-11-20 22:52:54,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:52:54,329 INFO L225 Difference]: With dead ends: 538 [2021-11-20 22:52:54,329 INFO L226 Difference]: Without dead ends: 303 [2021-11-20 22:52:54,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-20 22:52:54,331 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 131 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 12 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-11-20 22:52:54,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 402 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 377 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2021-11-20 22:52:54,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-11-20 22:52:54,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 252. [2021-11-20 22:52:54,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 1.5896414342629481) internal successors, (399), 251 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:52:54,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 399 transitions. [2021-11-20 22:52:54,344 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 399 transitions. Word has length 101 [2021-11-20 22:52:54,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:52:54,344 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 399 transitions. [2021-11-20 22:52:54,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 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) [2021-11-20 22:52:54,345 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 399 transitions. [2021-11-20 22:52:54,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-20 22:52:54,346 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:52:54,347 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:52:54,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-20 22:52:54,347 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:52:54,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:52:54,348 INFO L85 PathProgramCache]: Analyzing trace with hash -1963750516, now seen corresponding path program 1 times [2021-11-20 22:52:54,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:52:54,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395525584] [2021-11-20 22:52:54,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:52:54,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:52:54,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:52:54,461 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 22:52:54,461 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:52:54,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395525584] [2021-11-20 22:52:54,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395525584] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:52:54,461 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:52:54,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 22:52:54,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966007412] [2021-11-20 22:52:54,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:52:54,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 22:52:54,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:52:54,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 22:52:54,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 22:52:54,463 INFO L87 Difference]: Start difference. First operand 252 states and 399 transitions. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 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) [2021-11-20 22:52:56,476 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:52:57,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:52:57,179 INFO L93 Difference]: Finished difference Result 541 states and 848 transitions. [2021-11-20 22:52:57,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 22:52:57,180 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 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 102 [2021-11-20 22:52:57,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:52:57,183 INFO L225 Difference]: With dead ends: 541 [2021-11-20 22:52:57,183 INFO L226 Difference]: Without dead ends: 301 [2021-11-20 22:52:57,183 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-20 22:52:57,184 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 131 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 12 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-20 22:52:57,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 379 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 348 Invalid, 1 Unknown, 0 Unchecked, 2.7s Time] [2021-11-20 22:52:57,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2021-11-20 22:52:57,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 253. [2021-11-20 22:52:57,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 1.5873015873015872) internal successors, (400), 252 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:52:57,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 400 transitions. [2021-11-20 22:52:57,200 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 400 transitions. Word has length 102 [2021-11-20 22:52:57,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:52:57,201 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 400 transitions. [2021-11-20 22:52:57,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 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) [2021-11-20 22:52:57,201 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 400 transitions. [2021-11-20 22:52:57,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-20 22:52:57,202 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:52:57,202 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] [2021-11-20 22:52:57,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-20 22:52:57,203 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:52:57,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:52:57,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1201356581, now seen corresponding path program 1 times [2021-11-20 22:52:57,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:52:57,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092252030] [2021-11-20 22:52:57,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:52:57,205 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:52:57,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:52:57,318 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 22:52:57,319 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:52:57,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092252030] [2021-11-20 22:52:57,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092252030] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:52:57,319 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:52:57,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 22:52:57,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684796272] [2021-11-20 22:52:57,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:52:57,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 22:52:57,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:52:57,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 22:52:57,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 22:52:57,321 INFO L87 Difference]: Start difference. First operand 253 states and 400 transitions. Second operand has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:52:59,333 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:52:59,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:52:59,926 INFO L93 Difference]: Finished difference Result 537 states and 841 transitions. [2021-11-20 22:52:59,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 22:52:59,927 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 107 [2021-11-20 22:52:59,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:52:59,929 INFO L225 Difference]: With dead ends: 537 [2021-11-20 22:52:59,929 INFO L226 Difference]: Without dead ends: 296 [2021-11-20 22:52:59,930 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-20 22:52:59,931 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 113 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 12 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-11-20 22:52:59,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 408 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 371 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2021-11-20 22:52:59,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-11-20 22:52:59,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 256. [2021-11-20 22:52:59,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 1.580392156862745) internal successors, (403), 255 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:52:59,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 403 transitions. [2021-11-20 22:52:59,944 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 403 transitions. Word has length 107 [2021-11-20 22:52:59,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:52:59,944 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 403 transitions. [2021-11-20 22:52:59,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:52:59,944 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 403 transitions. [2021-11-20 22:52:59,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-20 22:52:59,945 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:52:59,946 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:52:59,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-20 22:52:59,946 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:52:59,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:52:59,947 INFO L85 PathProgramCache]: Analyzing trace with hash -109155263, now seen corresponding path program 1 times [2021-11-20 22:52:59,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:52:59,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565157689] [2021-11-20 22:52:59,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:52:59,947 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:52:59,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:53:00,050 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-20 22:53:00,051 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:53:00,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565157689] [2021-11-20 22:53:00,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565157689] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:53:00,051 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:53:00,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 22:53:00,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987813394] [2021-11-20 22:53:00,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:53:00,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 22:53:00,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:53:00,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 22:53:00,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:53:00,054 INFO L87 Difference]: Start difference. First operand 256 states and 403 transitions. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 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) [2021-11-20 22:53:02,066 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:53:02,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:53:02,436 INFO L93 Difference]: Finished difference Result 634 states and 1006 transitions. [2021-11-20 22:53:02,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:53:02,437 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 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 108 [2021-11-20 22:53:02,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:53:02,439 INFO L225 Difference]: With dead ends: 634 [2021-11-20 22:53:02,439 INFO L226 Difference]: Without dead ends: 390 [2021-11-20 22:53:02,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-20 22:53:02,440 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 208 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 74 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 22:53:02,441 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 259 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 228 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-20 22:53:02,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-11-20 22:53:02,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 316. [2021-11-20 22:53:02,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 1.615873015873016) internal successors, (509), 315 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:53:02,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 509 transitions. [2021-11-20 22:53:02,456 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 509 transitions. Word has length 108 [2021-11-20 22:53:02,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:53:02,456 INFO L470 AbstractCegarLoop]: Abstraction has 316 states and 509 transitions. [2021-11-20 22:53:02,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 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) [2021-11-20 22:53:02,457 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 509 transitions. [2021-11-20 22:53:02,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-20 22:53:02,458 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:53:02,458 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] [2021-11-20 22:53:02,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-11-20 22:53:02,458 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:53:02,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:53:02,459 INFO L85 PathProgramCache]: Analyzing trace with hash 127647493, now seen corresponding path program 1 times [2021-11-20 22:53:02,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:53:02,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232563404] [2021-11-20 22:53:02,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:53:02,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:53:02,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:53:02,584 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-20 22:53:02,584 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:53:02,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232563404] [2021-11-20 22:53:02,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232563404] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:53:02,585 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:53:02,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 22:53:02,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228376284] [2021-11-20 22:53:02,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:53:02,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:53:02,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:53:02,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:53:02,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:53:02,587 INFO L87 Difference]: Start difference. First operand 316 states and 509 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:53:04,599 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:53:04,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:53:04,987 INFO L93 Difference]: Finished difference Result 656 states and 1050 transitions. [2021-11-20 22:53:04,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:53:04,988 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 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 108 [2021-11-20 22:53:04,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:53:04,990 INFO L225 Difference]: With dead ends: 656 [2021-11-20 22:53:04,990 INFO L226 Difference]: Without dead ends: 352 [2021-11-20 22:53:04,991 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:53:04,991 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 77 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 22:53:04,991 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 295 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 232 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-20 22:53:04,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-11-20 22:53:05,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 316. [2021-11-20 22:53:05,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 1.6126984126984127) internal successors, (508), 315 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:53:05,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 508 transitions. [2021-11-20 22:53:05,005 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 508 transitions. Word has length 108 [2021-11-20 22:53:05,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:53:05,005 INFO L470 AbstractCegarLoop]: Abstraction has 316 states and 508 transitions. [2021-11-20 22:53:05,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:53:05,006 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 508 transitions. [2021-11-20 22:53:05,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-20 22:53:05,007 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:53:05,007 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 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] [2021-11-20 22:53:05,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-11-20 22:53:05,008 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:53:05,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:53:05,008 INFO L85 PathProgramCache]: Analyzing trace with hash 132268571, now seen corresponding path program 1 times [2021-11-20 22:53:05,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:53:05,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979947316] [2021-11-20 22:53:05,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:53:05,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:53:05,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:53:05,107 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-20 22:53:05,107 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:53:05,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979947316] [2021-11-20 22:53:05,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979947316] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:53:05,108 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:53:05,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 22:53:05,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290725239] [2021-11-20 22:53:05,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:53:05,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:53:05,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:53:05,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:53:05,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:53:05,110 INFO L87 Difference]: Start difference. First operand 316 states and 508 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) [2021-11-20 22:53:07,122 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:53:07,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:53:07,536 INFO L93 Difference]: Finished difference Result 654 states and 1046 transitions. [2021-11-20 22:53:07,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:53:07,537 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 [2021-11-20 22:53:07,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:53:07,539 INFO L225 Difference]: With dead ends: 654 [2021-11-20 22:53:07,539 INFO L226 Difference]: Without dead ends: 350 [2021-11-20 22:53:07,540 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:53:07,541 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 75 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 22:53:07,541 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 299 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 228 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-20 22:53:07,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2021-11-20 22:53:07,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 316. [2021-11-20 22:53:07,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 1.6095238095238096) internal successors, (507), 315 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:53:07,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 507 transitions. [2021-11-20 22:53:07,579 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 507 transitions. Word has length 109 [2021-11-20 22:53:07,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:53:07,580 INFO L470 AbstractCegarLoop]: Abstraction has 316 states and 507 transitions. [2021-11-20 22:53:07,580 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) [2021-11-20 22:53:07,580 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 507 transitions. [2021-11-20 22:53:07,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-20 22:53:07,582 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:53:07,582 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:53:07,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-11-20 22:53:07,582 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:53:07,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:53:07,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1700443050, now seen corresponding path program 1 times [2021-11-20 22:53:07,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:53:07,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725225761] [2021-11-20 22:53:07,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:53:07,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:53:07,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:53:07,688 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-20 22:53:07,688 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:53:07,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725225761] [2021-11-20 22:53:07,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725225761] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:53:07,689 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:53:07,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 22:53:07,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326735313] [2021-11-20 22:53:07,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:53:07,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 22:53:07,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:53:07,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 22:53:07,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:53:07,691 INFO L87 Difference]: Start difference. First operand 316 states and 507 transitions. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:53:09,702 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:53:10,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:53:10,208 INFO L93 Difference]: Finished difference Result 720 states and 1149 transitions. [2021-11-20 22:53:10,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:53:10,208 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 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 113 [2021-11-20 22:53:10,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:53:10,211 INFO L225 Difference]: With dead ends: 720 [2021-11-20 22:53:10,211 INFO L226 Difference]: Without dead ends: 416 [2021-11-20 22:53:10,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-20 22:53:10,212 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 205 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 92 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-20 22:53:10,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 243 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 229 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2021-11-20 22:53:10,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2021-11-20 22:53:10,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 351. [2021-11-20 22:53:10,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 1.6228571428571428) internal successors, (568), 350 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:53:10,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 568 transitions. [2021-11-20 22:53:10,227 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 568 transitions. Word has length 113 [2021-11-20 22:53:10,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:53:10,228 INFO L470 AbstractCegarLoop]: Abstraction has 351 states and 568 transitions. [2021-11-20 22:53:10,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:53:10,228 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 568 transitions. [2021-11-20 22:53:10,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-20 22:53:10,229 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:53:10,229 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:53:10,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-11-20 22:53:10,230 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:53:10,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:53:10,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1557011917, now seen corresponding path program 1 times [2021-11-20 22:53:10,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:53:10,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805505603] [2021-11-20 22:53:10,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:53:10,231 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:53:10,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:53:10,353 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 96 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-20 22:53:10,354 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:53:10,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805505603] [2021-11-20 22:53:10,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805505603] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:53:10,354 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:53:10,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 22:53:10,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812806912] [2021-11-20 22:53:10,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:53:10,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 22:53:10,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:53:10,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 22:53:10,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:53:10,357 INFO L87 Difference]: Start difference. First operand 351 states and 568 transitions. Second operand has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:53:12,371 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:53:12,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:53:12,816 INFO L93 Difference]: Finished difference Result 752 states and 1204 transitions. [2021-11-20 22:53:12,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:53:12,817 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 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 114 [2021-11-20 22:53:12,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:53:12,819 INFO L225 Difference]: With dead ends: 752 [2021-11-20 22:53:12,819 INFO L226 Difference]: Without dead ends: 413 [2021-11-20 22:53:12,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-20 22:53:12,821 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 117 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 49 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 22:53:12,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 316 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 290 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-20 22:53:12,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2021-11-20 22:53:12,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 351. [2021-11-20 22:53:12,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 1.6171428571428572) internal successors, (566), 350 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:53:12,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 566 transitions. [2021-11-20 22:53:12,838 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 566 transitions. Word has length 114 [2021-11-20 22:53:12,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:53:12,838 INFO L470 AbstractCegarLoop]: Abstraction has 351 states and 566 transitions. [2021-11-20 22:53:12,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:53:12,839 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 566 transitions. [2021-11-20 22:53:12,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-20 22:53:12,840 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:53:12,840 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:53:12,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-11-20 22:53:12,841 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:53:12,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:53:12,841 INFO L85 PathProgramCache]: Analyzing trace with hash -190481772, now seen corresponding path program 1 times [2021-11-20 22:53:12,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:53:12,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2724808] [2021-11-20 22:53:12,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:53:12,842 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:53:12,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:53:12,945 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-20 22:53:12,946 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:53:12,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2724808] [2021-11-20 22:53:12,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2724808] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:53:12,946 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:53:12,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 22:53:12,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392442338] [2021-11-20 22:53:12,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:53:12,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:53:12,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:53:12,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:53:12,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:53:12,948 INFO L87 Difference]: Start difference. First operand 351 states and 566 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:53:14,963 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:53:15,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:53:15,390 INFO L93 Difference]: Finished difference Result 724 states and 1162 transitions. [2021-11-20 22:53:15,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:53:15,391 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 119 [2021-11-20 22:53:15,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:53:15,393 INFO L225 Difference]: With dead ends: 724 [2021-11-20 22:53:15,393 INFO L226 Difference]: Without dead ends: 385 [2021-11-20 22:53:15,394 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:53:15,395 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 79 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 22:53:15,395 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 299 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 228 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-20 22:53:15,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2021-11-20 22:53:15,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 351. [2021-11-20 22:53:15,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 1.6142857142857143) internal successors, (565), 350 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:53:15,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 565 transitions. [2021-11-20 22:53:15,411 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 565 transitions. Word has length 119 [2021-11-20 22:53:15,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:53:15,411 INFO L470 AbstractCegarLoop]: Abstraction has 351 states and 565 transitions. [2021-11-20 22:53:15,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:53:15,412 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 565 transitions. [2021-11-20 22:53:15,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-20 22:53:15,413 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:53:15,413 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:53:15,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-11-20 22:53:15,414 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:53:15,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:53:15,414 INFO L85 PathProgramCache]: Analyzing trace with hash -1733748555, now seen corresponding path program 1 times [2021-11-20 22:53:15,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:53:15,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695900032] [2021-11-20 22:53:15,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:53:15,415 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:53:15,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:53:15,516 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 109 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-20 22:53:15,516 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:53:15,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695900032] [2021-11-20 22:53:15,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695900032] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:53:15,517 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:53:15,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 22:53:15,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592689343] [2021-11-20 22:53:15,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:53:15,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:53:15,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:53:15,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:53:15,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:53:15,519 INFO L87 Difference]: Start difference. First operand 351 states and 565 transitions. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:53:17,531 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:53:17,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:53:17,952 INFO L93 Difference]: Finished difference Result 770 states and 1236 transitions. [2021-11-20 22:53:17,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:53:17,960 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 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 119 [2021-11-20 22:53:17,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:53:17,963 INFO L225 Difference]: With dead ends: 770 [2021-11-20 22:53:17,963 INFO L226 Difference]: Without dead ends: 431 [2021-11-20 22:53:17,964 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:53:17,965 INFO L933 BasicCegarLoop]: 181 mSDtfsCounter, 57 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 22:53:17,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 435 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 261 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-20 22:53:17,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2021-11-20 22:53:17,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 392. [2021-11-20 22:53:17,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 1.6240409207161126) internal successors, (635), 391 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:53:17,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 635 transitions. [2021-11-20 22:53:17,982 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 635 transitions. Word has length 119 [2021-11-20 22:53:17,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:53:17,983 INFO L470 AbstractCegarLoop]: Abstraction has 392 states and 635 transitions. [2021-11-20 22:53:17,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:53:17,983 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 635 transitions. [2021-11-20 22:53:17,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-20 22:53:17,984 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:53:17,985 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:53:17,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-11-20 22:53:17,985 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:53:17,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:53:17,986 INFO L85 PathProgramCache]: Analyzing trace with hash 1687199486, now seen corresponding path program 1 times [2021-11-20 22:53:17,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:53:17,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004152210] [2021-11-20 22:53:17,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:53:17,986 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:53:18,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:53:18,105 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-20 22:53:18,105 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:53:18,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004152210] [2021-11-20 22:53:18,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004152210] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:53:18,106 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:53:18,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 22:53:18,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855968150] [2021-11-20 22:53:18,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:53:18,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 22:53:18,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:53:18,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 22:53:18,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:53:18,108 INFO L87 Difference]: Start difference. First operand 392 states and 635 transitions. Second operand has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:53:20,124 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:53:20,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:53:20,575 INFO L93 Difference]: Finished difference Result 872 states and 1403 transitions. [2021-11-20 22:53:20,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:53:20,576 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 states have internal predecessors, (105), 0 states have call successors, (0), 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 120 [2021-11-20 22:53:20,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:53:20,578 INFO L225 Difference]: With dead ends: 872 [2021-11-20 22:53:20,578 INFO L226 Difference]: Without dead ends: 492 [2021-11-20 22:53:20,580 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-20 22:53:20,582 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 195 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 92 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 22:53:20,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 254 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 231 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-20 22:53:20,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2021-11-20 22:53:20,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 392. [2021-11-20 22:53:20,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 1.6240409207161126) internal successors, (635), 391 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:53:20,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 635 transitions. [2021-11-20 22:53:20,609 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 635 transitions. Word has length 120 [2021-11-20 22:53:20,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:53:20,609 INFO L470 AbstractCegarLoop]: Abstraction has 392 states and 635 transitions. [2021-11-20 22:53:20,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:53:20,610 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 635 transitions. [2021-11-20 22:53:20,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-20 22:53:20,612 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:53:20,612 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 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] [2021-11-20 22:53:20,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-11-20 22:53:20,612 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:53:20,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:53:20,613 INFO L85 PathProgramCache]: Analyzing trace with hash 803365483, now seen corresponding path program 1 times [2021-11-20 22:53:20,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:53:20,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801512226] [2021-11-20 22:53:20,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:53:20,614 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:53:20,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:53:20,689 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 123 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-20 22:53:20,689 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:53:20,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801512226] [2021-11-20 22:53:20,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801512226] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:53:20,690 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:53:20,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 22:53:20,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881278338] [2021-11-20 22:53:20,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:53:20,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:53:20,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:53:20,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:53:20,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:53:20,692 INFO L87 Difference]: Start difference. First operand 392 states and 635 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) [2021-11-20 22:53:22,709 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:53:23,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:53:23,162 INFO L93 Difference]: Finished difference Result 852 states and 1375 transitions. [2021-11-20 22:53:23,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:53:23,163 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 120 [2021-11-20 22:53:23,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:53:23,165 INFO L225 Difference]: With dead ends: 852 [2021-11-20 22:53:23,166 INFO L226 Difference]: Without dead ends: 472 [2021-11-20 22:53:23,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:53:23,167 INFO L933 BasicCegarLoop]: 183 mSDtfsCounter, 83 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 22:53:23,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 437 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 258 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-20 22:53:23,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-11-20 22:53:23,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 406. [2021-11-20 22:53:23,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 1.6197530864197531) internal successors, (656), 405 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:53:23,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 656 transitions. [2021-11-20 22:53:23,186 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 656 transitions. Word has length 120 [2021-11-20 22:53:23,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:53:23,186 INFO L470 AbstractCegarLoop]: Abstraction has 406 states and 656 transitions. [2021-11-20 22:53:23,186 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) [2021-11-20 22:53:23,187 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 656 transitions. [2021-11-20 22:53:23,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-20 22:53:23,188 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:53:23,188 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:53:23,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-11-20 22:53:23,189 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:53:23,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:53:23,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1183170928, now seen corresponding path program 1 times [2021-11-20 22:53:23,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:53:23,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957608777] [2021-11-20 22:53:23,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:53:23,190 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:53:23,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:53:23,263 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 109 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-20 22:53:23,263 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:53:23,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957608777] [2021-11-20 22:53:23,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957608777] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:53:23,264 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:53:23,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 22:53:23,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895252088] [2021-11-20 22:53:23,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:53:23,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:53:23,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:53:23,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:53:23,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:53:23,266 INFO L87 Difference]: Start difference. First operand 406 states and 656 transitions. Second operand has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:53:25,286 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:53:25,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:53:25,773 INFO L93 Difference]: Finished difference Result 864 states and 1393 transitions. [2021-11-20 22:53:25,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:53:25,774 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-11-20 22:53:25,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:53:25,776 INFO L225 Difference]: With dead ends: 864 [2021-11-20 22:53:25,776 INFO L226 Difference]: Without dead ends: 468 [2021-11-20 22:53:25,777 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:53:25,778 INFO L933 BasicCegarLoop]: 183 mSDtfsCounter, 54 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-20 22:53:25,778 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 439 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 257 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2021-11-20 22:53:25,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-11-20 22:53:25,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 432. [2021-11-20 22:53:25,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 1.62877030162413) internal successors, (702), 431 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:53:25,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 702 transitions. [2021-11-20 22:53:25,798 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 702 transitions. Word has length 120 [2021-11-20 22:53:25,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:53:25,799 INFO L470 AbstractCegarLoop]: Abstraction has 432 states and 702 transitions. [2021-11-20 22:53:25,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:53:25,799 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 702 transitions. [2021-11-20 22:53:25,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-20 22:53:25,801 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:53:25,801 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1] [2021-11-20 22:53:25,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-11-20 22:53:25,802 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:53:25,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:53:25,802 INFO L85 PathProgramCache]: Analyzing trace with hash -521427646, now seen corresponding path program 1 times [2021-11-20 22:53:25,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:53:25,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712476633] [2021-11-20 22:53:25,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:53:25,803 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:53:25,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:53:25,899 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-20 22:53:25,899 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:53:25,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712476633] [2021-11-20 22:53:25,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712476633] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:53:25,900 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:53:25,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 22:53:25,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015635809] [2021-11-20 22:53:25,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:53:25,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:53:25,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:53:25,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:53:25,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:53:25,902 INFO L87 Difference]: Start difference. First operand 432 states and 702 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:53:27,917 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:53:28,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:53:28,299 INFO L93 Difference]: Finished difference Result 886 states and 1434 transitions. [2021-11-20 22:53:28,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:53:28,300 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2021-11-20 22:53:28,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:53:28,302 INFO L225 Difference]: With dead ends: 886 [2021-11-20 22:53:28,302 INFO L226 Difference]: Without dead ends: 466 [2021-11-20 22:53:28,303 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:53:28,304 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 77 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 22:53:28,304 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 299 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 228 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-20 22:53:28,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2021-11-20 22:53:28,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 432. [2021-11-20 22:53:28,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 1.6264501160092808) internal successors, (701), 431 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:53:28,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 701 transitions. [2021-11-20 22:53:28,326 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 701 transitions. Word has length 121 [2021-11-20 22:53:28,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:53:28,326 INFO L470 AbstractCegarLoop]: Abstraction has 432 states and 701 transitions. [2021-11-20 22:53:28,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:53:28,327 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 701 transitions. [2021-11-20 22:53:28,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-20 22:53:28,329 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:53:28,329 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 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] [2021-11-20 22:53:28,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-11-20 22:53:28,329 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:53:28,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:53:28,330 INFO L85 PathProgramCache]: Analyzing trace with hash -395310219, now seen corresponding path program 1 times [2021-11-20 22:53:28,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:53:28,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145093957] [2021-11-20 22:53:28,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:53:28,331 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:53:28,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:53:28,406 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 128 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-20 22:53:28,406 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:53:28,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145093957] [2021-11-20 22:53:28,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145093957] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:53:28,407 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:53:28,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 22:53:28,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861692336] [2021-11-20 22:53:28,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:53:28,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:53:28,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:53:28,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:53:28,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:53:28,410 INFO L87 Difference]: Start difference. First operand 432 states and 701 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:53:30,424 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:53:30,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:53:30,823 INFO L93 Difference]: Finished difference Result 886 states and 1432 transitions. [2021-11-20 22:53:30,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:53:30,829 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 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 121 [2021-11-20 22:53:30,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:53:30,832 INFO L225 Difference]: With dead ends: 886 [2021-11-20 22:53:30,832 INFO L226 Difference]: Without dead ends: 466 [2021-11-20 22:53:30,833 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:53:30,833 INFO L933 BasicCegarLoop]: 184 mSDtfsCounter, 77 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 22:53:30,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 439 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 249 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-20 22:53:30,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2021-11-20 22:53:30,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 432. [2021-11-20 22:53:30,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 1.6241299303944317) internal successors, (700), 431 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:53:30,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 700 transitions. [2021-11-20 22:53:30,856 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 700 transitions. Word has length 121 [2021-11-20 22:53:30,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:53:30,857 INFO L470 AbstractCegarLoop]: Abstraction has 432 states and 700 transitions. [2021-11-20 22:53:30,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:53:30,858 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 700 transitions. [2021-11-20 22:53:30,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-20 22:53:30,859 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:53:30,860 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] [2021-11-20 22:53:30,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-11-20 22:53:30,860 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:53:30,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:53:30,861 INFO L85 PathProgramCache]: Analyzing trace with hash 208249992, now seen corresponding path program 1 times [2021-11-20 22:53:30,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:53:30,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306976736] [2021-11-20 22:53:30,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:53:30,862 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:53:30,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:53:30,997 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-20 22:53:30,998 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:53:30,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306976736] [2021-11-20 22:53:30,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306976736] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:53:30,998 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:53:30,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 22:53:30,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709249272] [2021-11-20 22:53:30,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:53:30,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 22:53:31,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:53:31,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 22:53:31,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 22:53:31,001 INFO L87 Difference]: Start difference. First operand 432 states and 700 transitions. Second operand has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:53:33,014 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:53:33,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:53:33,576 INFO L93 Difference]: Finished difference Result 890 states and 1435 transitions. [2021-11-20 22:53:33,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 22:53:33,577 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 122 [2021-11-20 22:53:33,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:53:33,580 INFO L225 Difference]: With dead ends: 890 [2021-11-20 22:53:33,580 INFO L226 Difference]: Without dead ends: 470 [2021-11-20 22:53:33,580 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-20 22:53:33,581 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 147 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 12 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-20 22:53:33,581 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 389 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 338 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2021-11-20 22:53:33,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2021-11-20 22:53:33,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 432. [2021-11-20 22:53:33,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 1.6218097447795823) internal successors, (699), 431 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:53:33,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 699 transitions. [2021-11-20 22:53:33,603 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 699 transitions. Word has length 122 [2021-11-20 22:53:33,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:53:33,603 INFO L470 AbstractCegarLoop]: Abstraction has 432 states and 699 transitions. [2021-11-20 22:53:33,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:53:33,604 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 699 transitions. [2021-11-20 22:53:33,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-20 22:53:33,605 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:53:33,606 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1] [2021-11-20 22:53:33,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-11-20 22:53:33,606 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:53:33,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:53:33,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1208653809, now seen corresponding path program 1 times [2021-11-20 22:53:33,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:53:33,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897147864] [2021-11-20 22:53:33,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:53:33,608 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:53:33,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:53:33,728 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 106 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-20 22:53:33,728 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:53:33,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897147864] [2021-11-20 22:53:33,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897147864] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:53:33,729 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:53:33,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 22:53:33,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613141399] [2021-11-20 22:53:33,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:53:33,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:53:33,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:53:33,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:53:33,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:53:33,733 INFO L87 Difference]: Start difference. First operand 432 states and 699 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) [2021-11-20 22:53:35,746 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:53:36,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:53:36,095 INFO L93 Difference]: Finished difference Result 886 states and 1428 transitions. [2021-11-20 22:53:36,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:53:36,095 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 122 [2021-11-20 22:53:36,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:53:36,098 INFO L225 Difference]: With dead ends: 886 [2021-11-20 22:53:36,098 INFO L226 Difference]: Without dead ends: 466 [2021-11-20 22:53:36,098 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:53:36,099 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 74 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 22:53:36,099 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 299 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 228 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 22:53:36,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2021-11-20 22:53:36,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 432. [2021-11-20 22:53:36,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 1.6194895591647331) internal successors, (698), 431 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:53:36,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 698 transitions. [2021-11-20 22:53:36,119 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 698 transitions. Word has length 122 [2021-11-20 22:53:36,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:53:36,119 INFO L470 AbstractCegarLoop]: Abstraction has 432 states and 698 transitions. [2021-11-20 22:53:36,119 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) [2021-11-20 22:53:36,119 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 698 transitions. [2021-11-20 22:53:36,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-20 22:53:36,121 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:53:36,121 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1] [2021-11-20 22:53:36,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-11-20 22:53:36,122 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:53:36,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:53:36,122 INFO L85 PathProgramCache]: Analyzing trace with hash 171260903, now seen corresponding path program 1 times [2021-11-20 22:53:36,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:53:36,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773037925] [2021-11-20 22:53:36,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:53:36,123 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:53:36,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:53:36,245 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 111 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-20 22:53:36,246 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:53:36,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773037925] [2021-11-20 22:53:36,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773037925] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:53:36,246 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:53:36,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 22:53:36,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612625574] [2021-11-20 22:53:36,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:53:36,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:53:36,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:53:36,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:53:36,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:53:36,248 INFO L87 Difference]: Start difference. First operand 432 states and 698 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:53:38,261 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:53:38,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:53:38,650 INFO L93 Difference]: Finished difference Result 878 states and 1417 transitions. [2021-11-20 22:53:38,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:53:38,651 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 123 [2021-11-20 22:53:38,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:53:38,658 INFO L225 Difference]: With dead ends: 878 [2021-11-20 22:53:38,659 INFO L226 Difference]: Without dead ends: 458 [2021-11-20 22:53:38,659 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:53:38,660 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 68 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 22:53:38,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 307 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 220 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-20 22:53:38,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-11-20 22:53:38,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 432. [2021-11-20 22:53:38,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 1.617169373549884) internal successors, (697), 431 states have internal predecessors, (697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:53:38,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 697 transitions. [2021-11-20 22:53:38,681 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 697 transitions. Word has length 123 [2021-11-20 22:53:38,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:53:38,682 INFO L470 AbstractCegarLoop]: Abstraction has 432 states and 697 transitions. [2021-11-20 22:53:38,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:53:38,682 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 697 transitions. [2021-11-20 22:53:38,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-20 22:53:38,683 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:53:38,684 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] [2021-11-20 22:53:38,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-11-20 22:53:38,684 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:53:38,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:53:38,685 INFO L85 PathProgramCache]: Analyzing trace with hash -259478146, now seen corresponding path program 1 times [2021-11-20 22:53:38,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:53:38,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246337533] [2021-11-20 22:53:38,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:53:38,686 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:53:38,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:53:38,806 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 128 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-20 22:53:38,806 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:53:38,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246337533] [2021-11-20 22:53:38,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246337533] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:53:38,807 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:53:38,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 22:53:38,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654333839] [2021-11-20 22:53:38,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:53:38,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 22:53:38,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:53:38,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 22:53:38,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 22:53:38,810 INFO L87 Difference]: Start difference. First operand 432 states and 697 transitions. Second operand has 6 states, 6 states have (on average 14.833333333333334) internal successors, (89), 6 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) [2021-11-20 22:53:40,823 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:53:41,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:53:41,387 INFO L93 Difference]: Finished difference Result 880 states and 1418 transitions. [2021-11-20 22:53:41,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 22:53:41,388 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.833333333333334) internal successors, (89), 6 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 [2021-11-20 22:53:41,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:53:41,390 INFO L225 Difference]: With dead ends: 880 [2021-11-20 22:53:41,390 INFO L226 Difference]: Without dead ends: 460 [2021-11-20 22:53:41,391 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-20 22:53:41,391 INFO L933 BasicCegarLoop]: 121 mSDtfsCounter, 64 mSDsluCounter, 389 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 483 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-20 22:53:41,391 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 483 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 430 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2021-11-20 22:53:41,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-11-20 22:53:41,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 432. [2021-11-20 22:53:41,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 1.6148491879350348) internal successors, (696), 431 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:53:41,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 696 transitions. [2021-11-20 22:53:41,413 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 696 transitions. Word has length 123 [2021-11-20 22:53:41,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:53:41,414 INFO L470 AbstractCegarLoop]: Abstraction has 432 states and 696 transitions. [2021-11-20 22:53:41,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.833333333333334) internal successors, (89), 6 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) [2021-11-20 22:53:41,414 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 696 transitions. [2021-11-20 22:53:41,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-20 22:53:41,416 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:53:41,416 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] [2021-11-20 22:53:41,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-11-20 22:53:41,417 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:53:41,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:53:41,417 INFO L85 PathProgramCache]: Analyzing trace with hash 865481125, now seen corresponding path program 1 times [2021-11-20 22:53:41,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:53:41,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342245779] [2021-11-20 22:53:41,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:53:41,418 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:53:41,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:53:41,529 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 122 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-20 22:53:41,531 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:53:41,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342245779] [2021-11-20 22:53:41,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342245779] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:53:41,532 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:53:41,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 22:53:41,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544386759] [2021-11-20 22:53:41,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:53:41,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 22:53:41,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:53:41,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 22:53:41,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 22:53:41,534 INFO L87 Difference]: Start difference. First operand 432 states and 696 transitions. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:53:43,546 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:53:44,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:53:44,108 INFO L93 Difference]: Finished difference Result 880 states and 1416 transitions. [2021-11-20 22:53:44,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 22:53:44,108 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 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 125 [2021-11-20 22:53:44,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:53:44,111 INFO L225 Difference]: With dead ends: 880 [2021-11-20 22:53:44,111 INFO L226 Difference]: Without dead ends: 460 [2021-11-20 22:53:44,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-20 22:53:44,114 INFO L933 BasicCegarLoop]: 121 mSDtfsCounter, 60 mSDsluCounter, 389 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 483 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-20 22:53:44,114 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 483 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 430 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2021-11-20 22:53:44,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-11-20 22:53:44,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 432. [2021-11-20 22:53:44,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 1.6125290023201857) internal successors, (695), 431 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:53:44,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 695 transitions. [2021-11-20 22:53:44,134 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 695 transitions. Word has length 125 [2021-11-20 22:53:44,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:53:44,134 INFO L470 AbstractCegarLoop]: Abstraction has 432 states and 695 transitions. [2021-11-20 22:53:44,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:53:44,135 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 695 transitions. [2021-11-20 22:53:44,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-20 22:53:44,136 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:53:44,137 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] [2021-11-20 22:53:44,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-11-20 22:53:44,137 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:53:44,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:53:44,138 INFO L85 PathProgramCache]: Analyzing trace with hash 1592629647, now seen corresponding path program 1 times [2021-11-20 22:53:44,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:53:44,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637223069] [2021-11-20 22:53:44,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:53:44,139 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:53:44,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:53:44,264 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 124 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-20 22:53:44,264 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:53:44,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637223069] [2021-11-20 22:53:44,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637223069] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:53:44,265 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:53:44,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 22:53:44,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716558362] [2021-11-20 22:53:44,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:53:44,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 22:53:44,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:53:44,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 22:53:44,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 22:53:44,267 INFO L87 Difference]: Start difference. First operand 432 states and 695 transitions. Second operand has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 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) [2021-11-20 22:53:46,278 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:53:46,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:53:46,862 INFO L93 Difference]: Finished difference Result 872 states and 1401 transitions. [2021-11-20 22:53:46,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 22:53:46,863 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 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 [2021-11-20 22:53:46,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:53:46,865 INFO L225 Difference]: With dead ends: 872 [2021-11-20 22:53:46,865 INFO L226 Difference]: Without dead ends: 452 [2021-11-20 22:53:46,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-20 22:53:46,866 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 51 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-20 22:53:46,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 501 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 412 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2021-11-20 22:53:46,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2021-11-20 22:53:46,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 432. [2021-11-20 22:53:46,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 1.6102088167053363) internal successors, (694), 431 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:53:46,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 694 transitions. [2021-11-20 22:53:46,887 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 694 transitions. Word has length 126 [2021-11-20 22:53:46,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:53:46,888 INFO L470 AbstractCegarLoop]: Abstraction has 432 states and 694 transitions. [2021-11-20 22:53:46,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 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) [2021-11-20 22:53:46,888 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 694 transitions. [2021-11-20 22:53:46,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-20 22:53:46,890 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:53:46,890 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:53:46,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-11-20 22:53:46,891 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:53:46,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:53:46,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1718385853, now seen corresponding path program 1 times [2021-11-20 22:53:46,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:53:46,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345561331] [2021-11-20 22:53:46,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:53:46,892 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:53:46,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:53:46,967 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 135 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-20 22:53:46,967 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:53:46,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345561331] [2021-11-20 22:53:46,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345561331] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:53:46,968 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:53:46,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 22:53:46,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284915375] [2021-11-20 22:53:46,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:53:46,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:53:46,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:53:46,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:53:46,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:53:46,970 INFO L87 Difference]: Start difference. First operand 432 states and 694 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:53:48,983 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:53:49,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:53:49,456 INFO L93 Difference]: Finished difference Result 932 states and 1493 transitions. [2021-11-20 22:53:49,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:53:49,458 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 129 [2021-11-20 22:53:49,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:53:49,460 INFO L225 Difference]: With dead ends: 932 [2021-11-20 22:53:49,460 INFO L226 Difference]: Without dead ends: 512 [2021-11-20 22:53:49,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:53:49,461 INFO L933 BasicCegarLoop]: 184 mSDtfsCounter, 83 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-20 22:53:49,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 439 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 257 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2021-11-20 22:53:49,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2021-11-20 22:53:49,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 446. [2021-11-20 22:53:49,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 445 states have (on average 1.6067415730337078) internal successors, (715), 445 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:53:49,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 715 transitions. [2021-11-20 22:53:49,479 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 715 transitions. Word has length 129 [2021-11-20 22:53:49,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:53:49,479 INFO L470 AbstractCegarLoop]: Abstraction has 446 states and 715 transitions. [2021-11-20 22:53:49,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:53:49,480 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 715 transitions. [2021-11-20 22:53:49,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-20 22:53:49,481 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:53:49,482 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] [2021-11-20 22:53:49,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-11-20 22:53:49,482 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:53:49,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:53:49,483 INFO L85 PathProgramCache]: Analyzing trace with hash 590045032, now seen corresponding path program 1 times [2021-11-20 22:53:49,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:53:49,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243275759] [2021-11-20 22:53:49,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:53:49,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:53:49,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:53:49,561 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-20 22:53:49,561 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:53:49,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243275759] [2021-11-20 22:53:49,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243275759] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:53:49,562 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:53:49,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 22:53:49,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328528456] [2021-11-20 22:53:49,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:53:49,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:53:49,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:53:49,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:53:49,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:53:49,564 INFO L87 Difference]: Start difference. First operand 446 states and 715 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) [2021-11-20 22:53:51,577 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:53:51,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:53:51,909 INFO L93 Difference]: Finished difference Result 909 states and 1459 transitions. [2021-11-20 22:53:51,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:53:51,910 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 129 [2021-11-20 22:53:51,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:53:51,912 INFO L225 Difference]: With dead ends: 909 [2021-11-20 22:53:51,912 INFO L226 Difference]: Without dead ends: 475 [2021-11-20 22:53:51,913 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:53:51,913 INFO L933 BasicCegarLoop]: 165 mSDtfsCounter, 28 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 22:53:51,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 401 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 186 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 22:53:51,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-11-20 22:53:51,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 456. [2021-11-20 22:53:51,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 455 states have (on average 1.6131868131868132) internal successors, (734), 455 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:53:51,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 734 transitions. [2021-11-20 22:53:51,936 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 734 transitions. Word has length 129 [2021-11-20 22:53:51,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:53:51,936 INFO L470 AbstractCegarLoop]: Abstraction has 456 states and 734 transitions. [2021-11-20 22:53:51,937 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) [2021-11-20 22:53:51,937 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 734 transitions. [2021-11-20 22:53:51,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-20 22:53:51,938 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:53:51,939 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:53:51,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-11-20 22:53:51,939 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:53:51,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:53:51,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1260190307, now seen corresponding path program 1 times [2021-11-20 22:53:51,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:53:51,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834971529] [2021-11-20 22:53:51,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:53:51,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:53:51,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:53:52,012 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 140 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-20 22:53:52,013 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:53:52,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834971529] [2021-11-20 22:53:52,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834971529] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:53:52,013 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:53:52,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 22:53:52,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814189916] [2021-11-20 22:53:52,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:53:52,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:53:52,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:53:52,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:53:52,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:53:52,015 INFO L87 Difference]: Start difference. First operand 456 states and 734 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:53:54,028 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:53:54,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:53:54,364 INFO L93 Difference]: Finished difference Result 917 states and 1475 transitions. [2021-11-20 22:53:54,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:53:54,365 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 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 [2021-11-20 22:53:54,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:53:54,367 INFO L225 Difference]: With dead ends: 917 [2021-11-20 22:53:54,367 INFO L226 Difference]: Without dead ends: 473 [2021-11-20 22:53:54,368 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:53:54,368 INFO L933 BasicCegarLoop]: 168 mSDtfsCounter, 36 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 22:53:54,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 407 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 180 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 22:53:54,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2021-11-20 22:53:54,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 456. [2021-11-20 22:53:54,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 455 states have (on average 1.610989010989011) internal successors, (733), 455 states have internal predecessors, (733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:53:54,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 733 transitions. [2021-11-20 22:53:54,382 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 733 transitions. Word has length 130 [2021-11-20 22:53:54,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:53:54,383 INFO L470 AbstractCegarLoop]: Abstraction has 456 states and 733 transitions. [2021-11-20 22:53:54,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:53:54,383 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 733 transitions. [2021-11-20 22:53:54,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-20 22:53:54,384 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:53:54,384 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] [2021-11-20 22:53:54,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-11-20 22:53:54,384 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:53:54,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:53:54,385 INFO L85 PathProgramCache]: Analyzing trace with hash 588047727, now seen corresponding path program 1 times [2021-11-20 22:53:54,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:53:54,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308832576] [2021-11-20 22:53:54,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:53:54,385 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:53:54,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:53:54,503 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 136 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-20 22:53:54,503 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:53:54,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308832576] [2021-11-20 22:53:54,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308832576] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:53:54,504 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:53:54,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 22:53:54,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953735994] [2021-11-20 22:53:54,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:53:54,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 22:53:54,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:53:54,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 22:53:54,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 22:53:54,506 INFO L87 Difference]: Start difference. First operand 456 states and 733 transitions. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 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) [2021-11-20 22:53:56,518 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:53:56,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:53:56,985 INFO L93 Difference]: Finished difference Result 920 states and 1477 transitions. [2021-11-20 22:53:56,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 22:53:56,986 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 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 132 [2021-11-20 22:53:56,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:53:56,988 INFO L225 Difference]: With dead ends: 920 [2021-11-20 22:53:56,988 INFO L226 Difference]: Without dead ends: 476 [2021-11-20 22:53:56,989 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-20 22:53:56,989 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 73 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 22:53:56,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 432 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 332 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-20 22:53:56,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-11-20 22:53:57,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 456. [2021-11-20 22:53:57,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 455 states have (on average 1.6087912087912088) internal successors, (732), 455 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:53:57,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 732 transitions. [2021-11-20 22:53:57,011 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 732 transitions. Word has length 132 [2021-11-20 22:53:57,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:53:57,011 INFO L470 AbstractCegarLoop]: Abstraction has 456 states and 732 transitions. [2021-11-20 22:53:57,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 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) [2021-11-20 22:53:57,012 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 732 transitions. [2021-11-20 22:53:57,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-20 22:53:57,013 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:53:57,014 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:53:57,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-11-20 22:53:57,014 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:53:57,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:53:57,015 INFO L85 PathProgramCache]: Analyzing trace with hash -1206847790, now seen corresponding path program 1 times [2021-11-20 22:53:57,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:53:57,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361468526] [2021-11-20 22:53:57,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:53:57,015 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:53:57,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:53:57,102 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 136 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-11-20 22:53:57,102 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:53:57,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361468526] [2021-11-20 22:53:57,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361468526] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:53:57,103 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:53:57,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 22:53:57,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800770270] [2021-11-20 22:53:57,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:53:57,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:53:57,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:53:57,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:53:57,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:53:57,105 INFO L87 Difference]: Start difference. First operand 456 states and 732 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:53:59,118 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:53:59,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:53:59,505 INFO L93 Difference]: Finished difference Result 934 states and 1494 transitions. [2021-11-20 22:53:59,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:53:59,506 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 132 [2021-11-20 22:53:59,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:53:59,508 INFO L225 Difference]: With dead ends: 934 [2021-11-20 22:53:59,508 INFO L226 Difference]: Without dead ends: 490 [2021-11-20 22:53:59,509 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:53:59,509 INFO L933 BasicCegarLoop]: 154 mSDtfsCounter, 81 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 22:53:59,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 379 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 241 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-20 22:53:59,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-11-20 22:53:59,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 456. [2021-11-20 22:53:59,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 455 states have (on average 1.6065934065934067) internal successors, (731), 455 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:53:59,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 731 transitions. [2021-11-20 22:53:59,533 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 731 transitions. Word has length 132 [2021-11-20 22:53:59,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:53:59,533 INFO L470 AbstractCegarLoop]: Abstraction has 456 states and 731 transitions. [2021-11-20 22:53:59,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:53:59,533 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 731 transitions. [2021-11-20 22:53:59,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-20 22:53:59,535 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:53:59,535 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:53:59,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2021-11-20 22:53:59,536 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:53:59,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:53:59,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1414250707, now seen corresponding path program 1 times [2021-11-20 22:53:59,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:53:59,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82510261] [2021-11-20 22:53:59,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:53:59,537 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:53:59,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:53:59,613 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 139 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-20 22:53:59,613 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:53:59,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82510261] [2021-11-20 22:53:59,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82510261] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:53:59,613 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:53:59,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 22:53:59,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430437554] [2021-11-20 22:53:59,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:53:59,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:53:59,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:53:59,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:53:59,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:53:59,615 INFO L87 Difference]: Start difference. First operand 456 states and 731 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) [2021-11-20 22:54:01,628 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:54:02,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:54:02,066 INFO L93 Difference]: Finished difference Result 980 states and 1567 transitions. [2021-11-20 22:54:02,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:54:02,067 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 133 [2021-11-20 22:54:02,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:54:02,070 INFO L225 Difference]: With dead ends: 980 [2021-11-20 22:54:02,070 INFO L226 Difference]: Without dead ends: 536 [2021-11-20 22:54:02,070 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:54:02,071 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 83 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 22:54:02,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 443 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 259 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-20 22:54:02,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2021-11-20 22:54:02,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 470. [2021-11-20 22:54:02,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 469 states have (on average 1.603411513859275) internal successors, (752), 469 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:54:02,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 752 transitions. [2021-11-20 22:54:02,086 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 752 transitions. Word has length 133 [2021-11-20 22:54:02,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:54:02,087 INFO L470 AbstractCegarLoop]: Abstraction has 470 states and 752 transitions. [2021-11-20 22:54:02,087 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) [2021-11-20 22:54:02,087 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 752 transitions. [2021-11-20 22:54:02,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-20 22:54:02,088 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:54:02,089 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] [2021-11-20 22:54:02,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2021-11-20 22:54:02,089 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:54:02,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:54:02,089 INFO L85 PathProgramCache]: Analyzing trace with hash -572285704, now seen corresponding path program 1 times [2021-11-20 22:54:02,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:54:02,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528819354] [2021-11-20 22:54:02,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:54:02,090 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:54:02,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:54:02,164 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 114 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-20 22:54:02,164 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:54:02,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528819354] [2021-11-20 22:54:02,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528819354] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:54:02,165 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:54:02,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 22:54:02,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963509677] [2021-11-20 22:54:02,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:54:02,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:54:02,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:54:02,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:54:02,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:54:02,167 INFO L87 Difference]: Start difference. First operand 470 states and 752 transitions. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:54:04,182 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:54:04,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:54:04,543 INFO L93 Difference]: Finished difference Result 967 states and 1550 transitions. [2021-11-20 22:54:04,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:54:04,544 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 133 [2021-11-20 22:54:04,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:54:04,546 INFO L225 Difference]: With dead ends: 967 [2021-11-20 22:54:04,547 INFO L226 Difference]: Without dead ends: 509 [2021-11-20 22:54:04,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:54:04,548 INFO L933 BasicCegarLoop]: 173 mSDtfsCounter, 39 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 22:54:04,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 417 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 214 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 22:54:04,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-11-20 22:54:04,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 482. [2021-11-20 22:54:04,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 1.6112266112266111) internal successors, (775), 481 states have internal predecessors, (775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:54:04,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 775 transitions. [2021-11-20 22:54:04,563 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 775 transitions. Word has length 133 [2021-11-20 22:54:04,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:54:04,563 INFO L470 AbstractCegarLoop]: Abstraction has 482 states and 775 transitions. [2021-11-20 22:54:04,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:54:04,563 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 775 transitions. [2021-11-20 22:54:04,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-20 22:54:04,564 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:54:04,564 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] [2021-11-20 22:54:04,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2021-11-20 22:54:04,565 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:54:04,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:54:04,565 INFO L85 PathProgramCache]: Analyzing trace with hash 629560448, now seen corresponding path program 1 times [2021-11-20 22:54:04,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:54:04,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137954690] [2021-11-20 22:54:04,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:54:04,565 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:54:04,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:54:04,675 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 138 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-20 22:54:04,676 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:54:04,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137954690] [2021-11-20 22:54:04,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137954690] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:54:04,676 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:54:04,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 22:54:04,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676813116] [2021-11-20 22:54:04,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:54:04,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 22:54:04,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:54:04,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 22:54:04,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 22:54:04,678 INFO L87 Difference]: Start difference. First operand 482 states and 775 transitions. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 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) [2021-11-20 22:54:06,695 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:54:07,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:54:07,135 INFO L93 Difference]: Finished difference Result 970 states and 1559 transitions. [2021-11-20 22:54:07,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 22:54:07,136 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 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 [2021-11-20 22:54:07,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:54:07,138 INFO L225 Difference]: With dead ends: 970 [2021-11-20 22:54:07,138 INFO L226 Difference]: Without dead ends: 500 [2021-11-20 22:54:07,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-20 22:54:07,139 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 69 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 22:54:07,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 434 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 330 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-20 22:54:07,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2021-11-20 22:54:07,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 482. [2021-11-20 22:54:07,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 1.6091476091476091) internal successors, (774), 481 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:54:07,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 774 transitions. [2021-11-20 22:54:07,154 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 774 transitions. Word has length 133 [2021-11-20 22:54:07,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:54:07,154 INFO L470 AbstractCegarLoop]: Abstraction has 482 states and 774 transitions. [2021-11-20 22:54:07,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 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) [2021-11-20 22:54:07,155 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 774 transitions. [2021-11-20 22:54:07,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-20 22:54:07,155 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:54:07,155 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:54:07,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2021-11-20 22:54:07,156 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:54:07,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:54:07,156 INFO L85 PathProgramCache]: Analyzing trace with hash 270808988, now seen corresponding path program 1 times [2021-11-20 22:54:07,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:54:07,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080951070] [2021-11-20 22:54:07,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:54:07,157 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:54:07,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:54:07,222 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 142 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-11-20 22:54:07,223 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:54:07,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080951070] [2021-11-20 22:54:07,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080951070] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:54:07,223 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:54:07,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 22:54:07,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038518392] [2021-11-20 22:54:07,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:54:07,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:54:07,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:54:07,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:54:07,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:54:07,225 INFO L87 Difference]: Start difference. First operand 482 states and 774 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) [2021-11-20 22:54:09,237 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:54:09,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:54:09,628 INFO L93 Difference]: Finished difference Result 986 states and 1578 transitions. [2021-11-20 22:54:09,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:54:09,629 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 133 [2021-11-20 22:54:09,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:54:09,631 INFO L225 Difference]: With dead ends: 986 [2021-11-20 22:54:09,631 INFO L226 Difference]: Without dead ends: 516 [2021-11-20 22:54:09,632 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:54:09,632 INFO L933 BasicCegarLoop]: 151 mSDtfsCounter, 79 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 22:54:09,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 373 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 240 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-20 22:54:09,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2021-11-20 22:54:09,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 482. [2021-11-20 22:54:09,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 1.607068607068607) internal successors, (773), 481 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:54:09,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 773 transitions. [2021-11-20 22:54:09,667 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 773 transitions. Word has length 133 [2021-11-20 22:54:09,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:54:09,668 INFO L470 AbstractCegarLoop]: Abstraction has 482 states and 773 transitions. [2021-11-20 22:54:09,668 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) [2021-11-20 22:54:09,668 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 773 transitions. [2021-11-20 22:54:09,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-20 22:54:09,669 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:54:09,670 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:54:09,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2021-11-20 22:54:09,670 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:54:09,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:54:09,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1362262541, now seen corresponding path program 1 times [2021-11-20 22:54:09,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:54:09,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110954573] [2021-11-20 22:54:09,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:54:09,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:54:09,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:54:09,745 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 144 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-20 22:54:09,746 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:54:09,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110954573] [2021-11-20 22:54:09,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110954573] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:54:09,746 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:54:09,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 22:54:09,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097348653] [2021-11-20 22:54:09,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:54:09,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:54:09,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:54:09,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:54:09,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:54:09,748 INFO L87 Difference]: Start difference. First operand 482 states and 773 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) [2021-11-20 22:54:11,764 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:54:12,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:54:12,108 INFO L93 Difference]: Finished difference Result 977 states and 1566 transitions. [2021-11-20 22:54:12,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:54:12,109 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 134 [2021-11-20 22:54:12,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:54:12,112 INFO L225 Difference]: With dead ends: 977 [2021-11-20 22:54:12,112 INFO L226 Difference]: Without dead ends: 507 [2021-11-20 22:54:12,113 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:54:12,113 INFO L933 BasicCegarLoop]: 174 mSDtfsCounter, 49 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 22:54:12,113 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 419 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 207 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 22:54:12,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2021-11-20 22:54:12,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 482. [2021-11-20 22:54:12,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 1.604989604989605) internal successors, (772), 481 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:54:12,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 772 transitions. [2021-11-20 22:54:12,133 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 772 transitions. Word has length 134 [2021-11-20 22:54:12,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:54:12,134 INFO L470 AbstractCegarLoop]: Abstraction has 482 states and 772 transitions. [2021-11-20 22:54:12,134 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) [2021-11-20 22:54:12,134 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 772 transitions. [2021-11-20 22:54:12,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-20 22:54:12,135 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:54:12,136 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 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] [2021-11-20 22:54:12,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2021-11-20 22:54:12,136 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:54:12,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:54:12,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1002218130, now seen corresponding path program 1 times [2021-11-20 22:54:12,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:54:12,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819562121] [2021-11-20 22:54:12,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:54:12,138 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:54:12,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:54:12,210 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 162 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-20 22:54:12,210 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:54:12,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819562121] [2021-11-20 22:54:12,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819562121] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:54:12,211 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:54:12,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 22:54:12,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792704742] [2021-11-20 22:54:12,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:54:12,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:54:12,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:54:12,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:54:12,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:54:12,213 INFO L87 Difference]: Start difference. First operand 482 states and 772 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) [2021-11-20 22:54:14,225 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:54:14,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:54:14,607 INFO L93 Difference]: Finished difference Result 986 states and 1574 transitions. [2021-11-20 22:54:14,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:54:14,608 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 134 [2021-11-20 22:54:14,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:54:14,610 INFO L225 Difference]: With dead ends: 986 [2021-11-20 22:54:14,610 INFO L226 Difference]: Without dead ends: 516 [2021-11-20 22:54:14,611 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:54:14,616 INFO L933 BasicCegarLoop]: 151 mSDtfsCounter, 61 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 22:54:14,616 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 373 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 240 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-20 22:54:14,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2021-11-20 22:54:14,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 482. [2021-11-20 22:54:14,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 1.6029106029106028) internal successors, (771), 481 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:54:14,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 771 transitions. [2021-11-20 22:54:14,631 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 771 transitions. Word has length 134 [2021-11-20 22:54:14,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:54:14,631 INFO L470 AbstractCegarLoop]: Abstraction has 482 states and 771 transitions. [2021-11-20 22:54:14,631 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) [2021-11-20 22:54:14,632 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 771 transitions. [2021-11-20 22:54:14,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-20 22:54:14,632 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:54:14,632 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:54:14,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2021-11-20 22:54:14,633 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:54:14,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:54:14,633 INFO L85 PathProgramCache]: Analyzing trace with hash -1814313, now seen corresponding path program 1 times [2021-11-20 22:54:14,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:54:14,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955518897] [2021-11-20 22:54:14,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:54:14,633 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:54:14,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:54:14,712 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 148 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-11-20 22:54:14,712 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:54:14,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955518897] [2021-11-20 22:54:14,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955518897] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:54:14,713 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:54:14,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 22:54:14,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479290769] [2021-11-20 22:54:14,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:54:14,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:54:14,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:54:14,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:54:14,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:54:14,716 INFO L87 Difference]: Start difference. First operand 482 states and 771 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:54:16,729 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:54:17,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:54:17,128 INFO L93 Difference]: Finished difference Result 986 states and 1572 transitions. [2021-11-20 22:54:17,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:54:17,129 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 134 [2021-11-20 22:54:17,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:54:17,131 INFO L225 Difference]: With dead ends: 986 [2021-11-20 22:54:17,131 INFO L226 Difference]: Without dead ends: 516 [2021-11-20 22:54:17,136 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:54:17,137 INFO L933 BasicCegarLoop]: 151 mSDtfsCounter, 76 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 22:54:17,137 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 373 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 240 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-20 22:54:17,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2021-11-20 22:54:17,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 482. [2021-11-20 22:54:17,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 1.6008316008316008) internal successors, (770), 481 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:54:17,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 770 transitions. [2021-11-20 22:54:17,162 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 770 transitions. Word has length 134 [2021-11-20 22:54:17,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:54:17,162 INFO L470 AbstractCegarLoop]: Abstraction has 482 states and 770 transitions. [2021-11-20 22:54:17,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:54:17,162 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 770 transitions. [2021-11-20 22:54:17,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-20 22:54:17,164 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:54:17,164 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:54:17,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2021-11-20 22:54:17,164 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:54:17,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:54:17,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1301454785, now seen corresponding path program 1 times [2021-11-20 22:54:17,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:54:17,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588678918] [2021-11-20 22:54:17,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:54:17,165 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:54:17,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:54:17,249 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 154 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-11-20 22:54:17,250 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:54:17,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588678918] [2021-11-20 22:54:17,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588678918] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:54:17,250 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:54:17,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 22:54:17,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293394024] [2021-11-20 22:54:17,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:54:17,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:54:17,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:54:17,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:54:17,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:54:17,252 INFO L87 Difference]: Start difference. First operand 482 states and 770 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:54:19,263 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:54:19,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:54:19,674 INFO L93 Difference]: Finished difference Result 978 states and 1561 transitions. [2021-11-20 22:54:19,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:54:19,675 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 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 135 [2021-11-20 22:54:19,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:54:19,677 INFO L225 Difference]: With dead ends: 978 [2021-11-20 22:54:19,677 INFO L226 Difference]: Without dead ends: 508 [2021-11-20 22:54:19,678 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:54:19,678 INFO L933 BasicCegarLoop]: 155 mSDtfsCounter, 70 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 22:54:19,678 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 381 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 232 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-20 22:54:19,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2021-11-20 22:54:19,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 482. [2021-11-20 22:54:19,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 1.5987525987525988) internal successors, (769), 481 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:54:19,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 769 transitions. [2021-11-20 22:54:19,703 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 769 transitions. Word has length 135 [2021-11-20 22:54:19,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:54:19,703 INFO L470 AbstractCegarLoop]: Abstraction has 482 states and 769 transitions. [2021-11-20 22:54:19,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:54:19,703 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 769 transitions. [2021-11-20 22:54:19,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-20 22:54:19,705 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:54:19,705 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 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] [2021-11-20 22:54:19,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2021-11-20 22:54:19,705 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:54:19,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:54:19,706 INFO L85 PathProgramCache]: Analyzing trace with hash 870715736, now seen corresponding path program 1 times [2021-11-20 22:54:19,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:54:19,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122162740] [2021-11-20 22:54:19,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:54:19,707 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:54:19,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:54:19,770 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 164 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-20 22:54:19,770 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:54:19,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122162740] [2021-11-20 22:54:19,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122162740] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:54:19,771 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:54:19,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 22:54:19,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264913924] [2021-11-20 22:54:19,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:54:19,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:54:19,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:54:19,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:54:19,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:54:19,772 INFO L87 Difference]: Start difference. First operand 482 states and 769 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) [2021-11-20 22:54:21,784 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:54:22,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:54:22,182 INFO L93 Difference]: Finished difference Result 976 states and 1557 transitions. [2021-11-20 22:54:22,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:54:22,183 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 135 [2021-11-20 22:54:22,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:54:22,185 INFO L225 Difference]: With dead ends: 976 [2021-11-20 22:54:22,185 INFO L226 Difference]: Without dead ends: 506 [2021-11-20 22:54:22,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:54:22,186 INFO L933 BasicCegarLoop]: 156 mSDtfsCounter, 52 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 22:54:22,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 383 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 230 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-20 22:54:22,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-11-20 22:54:22,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 482. [2021-11-20 22:54:22,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 1.5966735966735968) internal successors, (768), 481 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:54:22,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 768 transitions. [2021-11-20 22:54:22,216 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 768 transitions. Word has length 135 [2021-11-20 22:54:22,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:54:22,217 INFO L470 AbstractCegarLoop]: Abstraction has 482 states and 768 transitions. [2021-11-20 22:54:22,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:54:22,217 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 768 transitions. [2021-11-20 22:54:22,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-20 22:54:22,218 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:54:22,218 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 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] [2021-11-20 22:54:22,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2021-11-20 22:54:22,219 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:54:22,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:54:22,219 INFO L85 PathProgramCache]: Analyzing trace with hash 355075839, now seen corresponding path program 1 times [2021-11-20 22:54:22,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:54:22,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041718713] [2021-11-20 22:54:22,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:54:22,220 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:54:22,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:54:22,284 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 158 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-20 22:54:22,285 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:54:22,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041718713] [2021-11-20 22:54:22,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041718713] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:54:22,285 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:54:22,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 22:54:22,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291491429] [2021-11-20 22:54:22,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:54:22,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:54:22,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:54:22,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:54:22,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:54:22,287 INFO L87 Difference]: Start difference. First operand 482 states and 768 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 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) [2021-11-20 22:54:24,300 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:54:24,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:54:24,633 INFO L93 Difference]: Finished difference Result 976 states and 1555 transitions. [2021-11-20 22:54:24,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:54:24,633 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 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 137 [2021-11-20 22:54:24,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:54:24,636 INFO L225 Difference]: With dead ends: 976 [2021-11-20 22:54:24,636 INFO L226 Difference]: Without dead ends: 506 [2021-11-20 22:54:24,636 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:54:24,636 INFO L933 BasicCegarLoop]: 156 mSDtfsCounter, 54 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 22:54:24,637 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 383 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 230 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 22:54:24,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-11-20 22:54:24,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 482. [2021-11-20 22:54:24,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 1.5945945945945945) internal successors, (767), 481 states have internal predecessors, (767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:54:24,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 767 transitions. [2021-11-20 22:54:24,663 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 767 transitions. Word has length 137 [2021-11-20 22:54:24,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:54:24,663 INFO L470 AbstractCegarLoop]: Abstraction has 482 states and 767 transitions. [2021-11-20 22:54:24,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 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) [2021-11-20 22:54:24,664 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 767 transitions. [2021-11-20 22:54:24,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-11-20 22:54:24,665 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:54:24,665 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:54:24,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2021-11-20 22:54:24,665 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:54:24,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:54:24,666 INFO L85 PathProgramCache]: Analyzing trace with hash -188114572, now seen corresponding path program 1 times [2021-11-20 22:54:24,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:54:24,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405092004] [2021-11-20 22:54:24,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:54:24,667 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:54:24,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:54:24,742 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 152 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-20 22:54:24,742 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:54:24,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405092004] [2021-11-20 22:54:24,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405092004] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:54:24,743 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:54:24,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 22:54:24,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701812039] [2021-11-20 22:54:24,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:54:24,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:54:24,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:54:24,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:54:24,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:54:24,745 INFO L87 Difference]: Start difference. First operand 482 states and 767 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) [2021-11-20 22:54:26,756 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:54:27,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:54:27,205 INFO L93 Difference]: Finished difference Result 1032 states and 1639 transitions. [2021-11-20 22:54:27,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:54:27,206 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 138 [2021-11-20 22:54:27,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:54:27,209 INFO L225 Difference]: With dead ends: 1032 [2021-11-20 22:54:27,209 INFO L226 Difference]: Without dead ends: 562 [2021-11-20 22:54:27,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:54:27,211 INFO L933 BasicCegarLoop]: 180 mSDtfsCounter, 83 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 22:54:27,211 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 431 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 256 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-20 22:54:27,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-11-20 22:54:27,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 496. [2021-11-20 22:54:27,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 496 states, 495 states have (on average 1.591919191919192) internal successors, (788), 495 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:54:27,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 788 transitions. [2021-11-20 22:54:27,238 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 788 transitions. Word has length 138 [2021-11-20 22:54:27,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:54:27,239 INFO L470 AbstractCegarLoop]: Abstraction has 496 states and 788 transitions. [2021-11-20 22:54:27,239 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) [2021-11-20 22:54:27,239 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 788 transitions. [2021-11-20 22:54:27,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-11-20 22:54:27,240 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:54:27,241 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, 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] [2021-11-20 22:54:27,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2021-11-20 22:54:27,241 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:54:27,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:54:27,241 INFO L85 PathProgramCache]: Analyzing trace with hash 2120316313, now seen corresponding path program 1 times [2021-11-20 22:54:27,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:54:27,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898347402] [2021-11-20 22:54:27,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:54:27,242 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:54:27,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:54:27,307 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 121 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-11-20 22:54:27,308 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:54:27,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898347402] [2021-11-20 22:54:27,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898347402] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:54:27,308 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:54:27,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 22:54:27,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157835287] [2021-11-20 22:54:27,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:54:27,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:54:27,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:54:27,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:54:27,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:54:27,310 INFO L87 Difference]: Start difference. First operand 496 states and 788 transitions. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:54:29,324 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:54:29,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:54:29,631 INFO L93 Difference]: Finished difference Result 997 states and 1587 transitions. [2021-11-20 22:54:29,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:54:29,631 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 138 [2021-11-20 22:54:29,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:54:29,633 INFO L225 Difference]: With dead ends: 997 [2021-11-20 22:54:29,634 INFO L226 Difference]: Without dead ends: 513 [2021-11-20 22:54:29,634 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:54:29,634 INFO L933 BasicCegarLoop]: 157 mSDtfsCounter, 18 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 22:54:29,634 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 385 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 164 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 22:54:29,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2021-11-20 22:54:29,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 501. [2021-11-20 22:54:29,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 500 states have (on average 1.594) internal successors, (797), 500 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:54:29,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 797 transitions. [2021-11-20 22:54:29,658 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 797 transitions. Word has length 138 [2021-11-20 22:54:29,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:54:29,658 INFO L470 AbstractCegarLoop]: Abstraction has 501 states and 797 transitions. [2021-11-20 22:54:29,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:54:29,658 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 797 transitions. [2021-11-20 22:54:29,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-11-20 22:54:29,660 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:54:29,660 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 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] [2021-11-20 22:54:29,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2021-11-20 22:54:29,660 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:54:29,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:54:29,661 INFO L85 PathProgramCache]: Analyzing trace with hash -1345032331, now seen corresponding path program 1 times [2021-11-20 22:54:29,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:54:29,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856682152] [2021-11-20 22:54:29,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:54:29,662 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:54:29,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:54:29,739 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 160 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-20 22:54:29,739 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:54:29,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856682152] [2021-11-20 22:54:29,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856682152] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:54:29,740 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:54:29,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 22:54:29,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582301987] [2021-11-20 22:54:29,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:54:29,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:54:29,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:54:29,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:54:29,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:54:29,742 INFO L87 Difference]: Start difference. First operand 501 states and 797 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) [2021-11-20 22:54:31,754 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:54:32,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:54:32,103 INFO L93 Difference]: Finished difference Result 1006 states and 1600 transitions. [2021-11-20 22:54:32,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:54:32,103 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 138 [2021-11-20 22:54:32,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:54:32,109 INFO L225 Difference]: With dead ends: 1006 [2021-11-20 22:54:32,110 INFO L226 Difference]: Without dead ends: 517 [2021-11-20 22:54:32,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:54:32,110 INFO L933 BasicCegarLoop]: 165 mSDtfsCounter, 43 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 22:54:32,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 401 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 212 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 22:54:32,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2021-11-20 22:54:32,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 501. [2021-11-20 22:54:32,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 500 states have (on average 1.592) internal successors, (796), 500 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:54:32,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 796 transitions. [2021-11-20 22:54:32,128 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 796 transitions. Word has length 138 [2021-11-20 22:54:32,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:54:32,128 INFO L470 AbstractCegarLoop]: Abstraction has 501 states and 796 transitions. [2021-11-20 22:54:32,128 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) [2021-11-20 22:54:32,128 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 796 transitions. [2021-11-20 22:54:32,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-20 22:54:32,129 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:54:32,129 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:54:32,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2021-11-20 22:54:32,130 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:54:32,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:54:32,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1066420852, now seen corresponding path program 1 times [2021-11-20 22:54:32,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:54:32,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280514964] [2021-11-20 22:54:32,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:54:32,131 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:54:32,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:54:32,190 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 157 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-20 22:54:32,190 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:54:32,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280514964] [2021-11-20 22:54:32,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280514964] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:54:32,190 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:54:32,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 22:54:32,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940532320] [2021-11-20 22:54:32,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:54:32,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:54:32,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:54:32,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:54:32,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:54:32,192 INFO L87 Difference]: Start difference. First operand 501 states and 796 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) [2021-11-20 22:54:34,184 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.99s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:54:36,210 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:54:38,239 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:54:38,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:54:38,518 INFO L93 Difference]: Finished difference Result 1000 states and 1591 transitions. [2021-11-20 22:54:38,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:54:38,519 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 139 [2021-11-20 22:54:38,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:54:38,522 INFO L225 Difference]: With dead ends: 1000 [2021-11-20 22:54:38,522 INFO L226 Difference]: Without dead ends: 511 [2021-11-20 22:54:38,522 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:54:38,523 INFO L933 BasicCegarLoop]: 160 mSDtfsCounter, 21 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 7 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2021-11-20 22:54:38,523 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 391 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 159 Invalid, 2 Unknown, 0 Unchecked, 6.3s Time] [2021-11-20 22:54:38,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2021-11-20 22:54:38,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 501. [2021-11-20 22:54:38,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 500 states have (on average 1.59) internal successors, (795), 500 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:54:38,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 795 transitions. [2021-11-20 22:54:38,546 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 795 transitions. Word has length 139 [2021-11-20 22:54:38,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:54:38,546 INFO L470 AbstractCegarLoop]: Abstraction has 501 states and 795 transitions. [2021-11-20 22:54:38,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:54:38,546 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 795 transitions. [2021-11-20 22:54:38,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-20 22:54:38,547 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:54:38,548 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:54:38,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2021-11-20 22:54:38,548 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:54:38,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:54:38,548 INFO L85 PathProgramCache]: Analyzing trace with hash -126580909, now seen corresponding path program 1 times [2021-11-20 22:54:38,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:54:38,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684982106] [2021-11-20 22:54:38,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:54:38,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:54:38,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:54:38,613 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 152 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-20 22:54:38,613 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:54:38,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684982106] [2021-11-20 22:54:38,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684982106] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:54:38,613 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:54:38,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 22:54:38,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105265615] [2021-11-20 22:54:38,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:54:38,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:54:38,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:54:38,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:54:38,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:54:38,615 INFO L87 Difference]: Start difference. First operand 501 states and 795 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) [2021-11-20 22:54:40,627 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:54:41,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:54:41,007 INFO L93 Difference]: Finished difference Result 1070 states and 1695 transitions. [2021-11-20 22:54:41,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:54:41,008 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 139 [2021-11-20 22:54:41,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:54:41,010 INFO L225 Difference]: With dead ends: 1070 [2021-11-20 22:54:41,010 INFO L226 Difference]: Without dead ends: 581 [2021-11-20 22:54:41,010 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:54:41,011 INFO L933 BasicCegarLoop]: 179 mSDtfsCounter, 83 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 22:54:41,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 429 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 256 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-20 22:54:41,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2021-11-20 22:54:41,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 515. [2021-11-20 22:54:41,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 1.5875486381322956) internal successors, (816), 514 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:54:41,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 816 transitions. [2021-11-20 22:54:41,028 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 816 transitions. Word has length 139 [2021-11-20 22:54:41,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:54:41,028 INFO L470 AbstractCegarLoop]: Abstraction has 515 states and 816 transitions. [2021-11-20 22:54:41,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:54:41,028 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 816 transitions. [2021-11-20 22:54:41,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-20 22:54:41,029 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:54:41,030 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, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:54:41,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2021-11-20 22:54:41,030 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:54:41,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:54:41,031 INFO L85 PathProgramCache]: Analyzing trace with hash -2113117320, now seen corresponding path program 1 times [2021-11-20 22:54:41,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:54:41,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532645502] [2021-11-20 22:54:41,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:54:41,031 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:54:41,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:54:41,127 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 135 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-20 22:54:41,127 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:54:41,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532645502] [2021-11-20 22:54:41,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532645502] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:54:41,128 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:54:41,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 22:54:41,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822917046] [2021-11-20 22:54:41,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:54:41,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:54:41,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:54:41,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:54:41,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:54:41,129 INFO L87 Difference]: Start difference. First operand 515 states and 816 transitions. Second operand has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:54:43,142 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:54:43,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:54:43,560 INFO L93 Difference]: Finished difference Result 1072 states and 1700 transitions. [2021-11-20 22:54:43,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:54:43,561 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 139 [2021-11-20 22:54:43,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:54:43,564 INFO L225 Difference]: With dead ends: 1072 [2021-11-20 22:54:43,564 INFO L226 Difference]: Without dead ends: 569 [2021-11-20 22:54:43,565 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:54:43,565 INFO L933 BasicCegarLoop]: 177 mSDtfsCounter, 50 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 22:54:43,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 425 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 237 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-20 22:54:43,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2021-11-20 22:54:43,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 534. [2021-11-20 22:54:43,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 534 states, 533 states have (on average 1.598499061913696) internal successors, (852), 533 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:54:43,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 852 transitions. [2021-11-20 22:54:43,583 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 852 transitions. Word has length 139 [2021-11-20 22:54:43,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:54:43,584 INFO L470 AbstractCegarLoop]: Abstraction has 534 states and 852 transitions. [2021-11-20 22:54:43,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:54:43,584 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 852 transitions. [2021-11-20 22:54:43,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-11-20 22:54:43,585 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:54:43,586 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:54:43,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2021-11-20 22:54:43,586 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:54:43,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:54:43,587 INFO L85 PathProgramCache]: Analyzing trace with hash 841122701, now seen corresponding path program 1 times [2021-11-20 22:54:43,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:54:43,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309835688] [2021-11-20 22:54:43,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:54:43,587 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:54:43,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:54:43,652 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 157 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-20 22:54:43,652 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:54:43,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309835688] [2021-11-20 22:54:43,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309835688] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:54:43,653 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:54:43,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 22:54:43,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024521468] [2021-11-20 22:54:43,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:54:43,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:54:43,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:54:43,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:54:43,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:54:43,655 INFO L87 Difference]: Start difference. First operand 534 states and 852 transitions. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:54:45,667 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:54:46,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:54:46,043 INFO L93 Difference]: Finished difference Result 1089 states and 1733 transitions. [2021-11-20 22:54:46,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:54:46,043 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-11-20 22:54:46,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:54:46,046 INFO L225 Difference]: With dead ends: 1089 [2021-11-20 22:54:46,046 INFO L226 Difference]: Without dead ends: 567 [2021-11-20 22:54:46,047 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:54:46,048 INFO L933 BasicCegarLoop]: 180 mSDtfsCounter, 67 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 22:54:46,048 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 431 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 231 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-20 22:54:46,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2021-11-20 22:54:46,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 534. [2021-11-20 22:54:46,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 534 states, 533 states have (on average 1.596622889305816) internal successors, (851), 533 states have internal predecessors, (851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:54:46,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 851 transitions. [2021-11-20 22:54:46,070 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 851 transitions. Word has length 140 [2021-11-20 22:54:46,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:54:46,071 INFO L470 AbstractCegarLoop]: Abstraction has 534 states and 851 transitions. [2021-11-20 22:54:46,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:54:46,071 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 851 transitions. [2021-11-20 22:54:46,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-20 22:54:46,072 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:54:46,073 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:54:46,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2021-11-20 22:54:46,073 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:54:46,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:54:46,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1080061014, now seen corresponding path program 1 times [2021-11-20 22:54:46,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:54:46,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306328024] [2021-11-20 22:54:46,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:54:46,074 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:54:46,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:54:46,136 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 148 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-20 22:54:46,136 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:54:46,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306328024] [2021-11-20 22:54:46,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306328024] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:54:46,137 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:54:46,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 22:54:46,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036312446] [2021-11-20 22:54:46,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:54:46,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:54:46,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:54:46,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:54:46,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:54:46,139 INFO L87 Difference]: Start difference. First operand 534 states and 851 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:54:48,150 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:54:48,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:54:48,460 INFO L93 Difference]: Finished difference Result 1073 states and 1709 transitions. [2021-11-20 22:54:48,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:54:48,461 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2021-11-20 22:54:48,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:54:48,463 INFO L225 Difference]: With dead ends: 1073 [2021-11-20 22:54:48,463 INFO L226 Difference]: Without dead ends: 551 [2021-11-20 22:54:48,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:54:48,464 INFO L933 BasicCegarLoop]: 156 mSDtfsCounter, 40 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 22:54:48,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 383 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 177 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 22:54:48,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2021-11-20 22:54:48,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 534. [2021-11-20 22:54:48,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 534 states, 533 states have (on average 1.594746716697936) internal successors, (850), 533 states have internal predecessors, (850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:54:48,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 850 transitions. [2021-11-20 22:54:48,484 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 850 transitions. Word has length 141 [2021-11-20 22:54:48,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:54:48,484 INFO L470 AbstractCegarLoop]: Abstraction has 534 states and 850 transitions. [2021-11-20 22:54:48,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:54:48,484 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 850 transitions. [2021-11-20 22:54:48,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-20 22:54:48,485 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:54:48,485 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:54:48,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2021-11-20 22:54:48,485 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:54:48,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:54:48,486 INFO L85 PathProgramCache]: Analyzing trace with hash -93768252, now seen corresponding path program 1 times [2021-11-20 22:54:48,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:54:48,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770418911] [2021-11-20 22:54:48,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:54:48,486 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:54:48,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:54:48,546 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 154 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-20 22:54:48,546 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:54:48,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770418911] [2021-11-20 22:54:48,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770418911] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:54:48,547 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:54:48,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 22:54:48,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860883189] [2021-11-20 22:54:48,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:54:48,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:54:48,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:54:48,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:54:48,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:54:48,548 INFO L87 Difference]: Start difference. First operand 534 states and 850 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) [2021-11-20 22:54:50,557 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:54:50,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:54:50,867 INFO L93 Difference]: Finished difference Result 1073 states and 1707 transitions. [2021-11-20 22:54:50,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:54:50,868 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 142 [2021-11-20 22:54:50,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:54:50,869 INFO L225 Difference]: With dead ends: 1073 [2021-11-20 22:54:50,870 INFO L226 Difference]: Without dead ends: 551 [2021-11-20 22:54:50,870 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:54:50,871 INFO L933 BasicCegarLoop]: 156 mSDtfsCounter, 38 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 22:54:50,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 383 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 177 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 22:54:50,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2021-11-20 22:54:50,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 534. [2021-11-20 22:54:50,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 534 states, 533 states have (on average 1.5928705440900564) internal successors, (849), 533 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:54:50,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 849 transitions. [2021-11-20 22:54:50,892 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 849 transitions. Word has length 142 [2021-11-20 22:54:50,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:54:50,892 INFO L470 AbstractCegarLoop]: Abstraction has 534 states and 849 transitions. [2021-11-20 22:54:50,892 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) [2021-11-20 22:54:50,892 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 849 transitions. [2021-11-20 22:54:50,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-20 22:54:50,893 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:54:50,893 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:54:50,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2021-11-20 22:54:50,893 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:54:50,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:54:50,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1581193135, now seen corresponding path program 1 times [2021-11-20 22:54:50,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:54:50,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293976845] [2021-11-20 22:54:50,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:54:50,894 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:54:50,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:54:50,954 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 160 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-20 22:54:50,954 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:54:50,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293976845] [2021-11-20 22:54:50,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293976845] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:54:50,954 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:54:50,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 22:54:50,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119625828] [2021-11-20 22:54:50,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:54:50,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:54:50,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:54:50,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:54:50,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:54:50,956 INFO L87 Difference]: Start difference. First operand 534 states and 849 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) [2021-11-20 22:54:52,968 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:54:53,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:54:53,301 INFO L93 Difference]: Finished difference Result 1073 states and 1705 transitions. [2021-11-20 22:54:53,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:54:53,302 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 143 [2021-11-20 22:54:53,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:54:53,306 INFO L225 Difference]: With dead ends: 1073 [2021-11-20 22:54:53,306 INFO L226 Difference]: Without dead ends: 551 [2021-11-20 22:54:53,307 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 [2021-11-20 22:54:53,307 INFO L933 BasicCegarLoop]: 156 mSDtfsCounter, 36 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 22:54:53,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 383 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 177 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 22:54:53,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2021-11-20 22:54:53,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 534. [2021-11-20 22:54:53,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 534 states, 533 states have (on average 1.5909943714821764) internal successors, (848), 533 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:54:53,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 848 transitions. [2021-11-20 22:54:53,336 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 848 transitions. Word has length 143 [2021-11-20 22:54:53,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:54:53,336 INFO L470 AbstractCegarLoop]: Abstraction has 534 states and 848 transitions. [2021-11-20 22:54:53,336 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) [2021-11-20 22:54:53,337 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 848 transitions. [2021-11-20 22:54:53,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-20 22:54:53,337 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:54:53,338 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:54:53,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2021-11-20 22:54:53,338 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:54:53,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:54:53,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1164921879, now seen corresponding path program 1 times [2021-11-20 22:54:53,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:54:53,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627597025] [2021-11-20 22:54:53,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:54:53,339 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:54:53,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:54:53,396 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 166 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-20 22:54:53,396 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:54:53,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627597025] [2021-11-20 22:54:53,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627597025] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:54:53,397 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:54:53,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 22:54:53,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300599635] [2021-11-20 22:54:53,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:54:53,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:54:53,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:54:53,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:54:53,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:54:53,398 INFO L87 Difference]: Start difference. First operand 534 states and 848 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:54:55,412 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:54:55,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:54:55,705 INFO L93 Difference]: Finished difference Result 1065 states and 1694 transitions. [2021-11-20 22:54:55,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:54:55,705 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 144 [2021-11-20 22:54:55,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:54:55,706 INFO L225 Difference]: With dead ends: 1065 [2021-11-20 22:54:55,706 INFO L226 Difference]: Without dead ends: 543 [2021-11-20 22:54:55,707 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:54:55,707 INFO L933 BasicCegarLoop]: 160 mSDtfsCounter, 30 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 22:54:55,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 391 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 169 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 22:54:55,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2021-11-20 22:54:55,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 534. [2021-11-20 22:54:55,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 534 states, 533 states have (on average 1.5891181988742964) internal successors, (847), 533 states have internal predecessors, (847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:54:55,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 847 transitions. [2021-11-20 22:54:55,726 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 847 transitions. Word has length 144 [2021-11-20 22:54:55,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:54:55,726 INFO L470 AbstractCegarLoop]: Abstraction has 534 states and 847 transitions. [2021-11-20 22:54:55,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:54:55,726 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 847 transitions. [2021-11-20 22:54:55,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-20 22:54:55,727 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:54:55,727 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 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] [2021-11-20 22:54:55,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2021-11-20 22:54:55,727 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:54:55,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:54:55,728 INFO L85 PathProgramCache]: Analyzing trace with hash -979814699, now seen corresponding path program 1 times [2021-11-20 22:54:55,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:54:55,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25264811] [2021-11-20 22:54:55,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:54:55,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:54:55,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:54:55,787 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 172 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-20 22:54:55,787 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:54:55,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25264811] [2021-11-20 22:54:55,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25264811] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:54:55,787 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:54:55,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 22:54:55,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793239550] [2021-11-20 22:54:55,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:54:55,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:54:55,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:54:55,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:54:55,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:54:55,789 INFO L87 Difference]: Start difference. First operand 534 states and 847 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) [2021-11-20 22:54:57,803 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:54:58,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:54:58,112 INFO L93 Difference]: Finished difference Result 1072 states and 1700 transitions. [2021-11-20 22:54:58,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:54:58,113 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 144 [2021-11-20 22:54:58,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:54:58,114 INFO L225 Difference]: With dead ends: 1072 [2021-11-20 22:54:58,114 INFO L226 Difference]: Without dead ends: 550 [2021-11-20 22:54:58,115 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:54:58,115 INFO L933 BasicCegarLoop]: 165 mSDtfsCounter, 36 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 22:54:58,115 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 401 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 212 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 22:54:58,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-11-20 22:54:58,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 534. [2021-11-20 22:54:58,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 534 states, 533 states have (on average 1.5872420262664164) internal successors, (846), 533 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:54:58,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 846 transitions. [2021-11-20 22:54:58,134 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 846 transitions. Word has length 144 [2021-11-20 22:54:58,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:54:58,134 INFO L470 AbstractCegarLoop]: Abstraction has 534 states and 846 transitions. [2021-11-20 22:54:58,134 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) [2021-11-20 22:54:58,134 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 846 transitions. [2021-11-20 22:54:58,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-20 22:54:58,135 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:54:58,135 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:54:58,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2021-11-20 22:54:58,136 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:54:58,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:54:58,136 INFO L85 PathProgramCache]: Analyzing trace with hash -2003306182, now seen corresponding path program 1 times [2021-11-20 22:54:58,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:54:58,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423978022] [2021-11-20 22:54:58,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:54:58,137 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:54:58,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:54:58,204 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 152 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-20 22:54:58,204 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:54:58,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423978022] [2021-11-20 22:54:58,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423978022] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:54:58,204 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:54:58,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 22:54:58,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107869065] [2021-11-20 22:54:58,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:54:58,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:54:58,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:54:58,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:54:58,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:54:58,206 INFO L87 Difference]: Start difference. First operand 534 states and 846 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:55:00,218 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:55:00,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:55:00,534 INFO L93 Difference]: Finished difference Result 1081 states and 1712 transitions. [2021-11-20 22:55:00,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:55:00,535 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 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 145 [2021-11-20 22:55:00,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:55:00,536 INFO L225 Difference]: With dead ends: 1081 [2021-11-20 22:55:00,536 INFO L226 Difference]: Without dead ends: 559 [2021-11-20 22:55:00,537 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:55:00,537 INFO L933 BasicCegarLoop]: 148 mSDtfsCounter, 53 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 22:55:00,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 367 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 200 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 22:55:00,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-11-20 22:55:00,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 534. [2021-11-20 22:55:00,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 534 states, 533 states have (on average 1.5853658536585367) internal successors, (845), 533 states have internal predecessors, (845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:55:00,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 845 transitions. [2021-11-20 22:55:00,570 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 845 transitions. Word has length 145 [2021-11-20 22:55:00,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:55:00,570 INFO L470 AbstractCegarLoop]: Abstraction has 534 states and 845 transitions. [2021-11-20 22:55:00,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:55:00,570 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 845 transitions. [2021-11-20 22:55:00,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-20 22:55:00,572 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:55:00,572 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 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] [2021-11-20 22:55:00,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2021-11-20 22:55:00,573 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:55:00,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:55:00,573 INFO L85 PathProgramCache]: Analyzing trace with hash -729534502, now seen corresponding path program 1 times [2021-11-20 22:55:00,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:55:00,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793267574] [2021-11-20 22:55:00,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:55:00,574 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:55:00,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:55:00,639 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 174 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-20 22:55:00,639 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:55:00,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793267574] [2021-11-20 22:55:00,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793267574] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:55:00,640 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:55:00,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 22:55:00,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052198063] [2021-11-20 22:55:00,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:55:00,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:55:00,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:55:00,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:55:00,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:55:00,641 INFO L87 Difference]: Start difference. First operand 534 states and 845 transitions. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 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) [2021-11-20 22:55:02,653 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:55:02,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:55:02,961 INFO L93 Difference]: Finished difference Result 1070 states and 1694 transitions. [2021-11-20 22:55:02,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:55:02,962 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 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 145 [2021-11-20 22:55:02,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:55:02,963 INFO L225 Difference]: With dead ends: 1070 [2021-11-20 22:55:02,963 INFO L226 Difference]: Without dead ends: 548 [2021-11-20 22:55:02,964 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:55:02,964 INFO L933 BasicCegarLoop]: 166 mSDtfsCounter, 33 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 22:55:02,964 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 403 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 210 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 22:55:02,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2021-11-20 22:55:02,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 534. [2021-11-20 22:55:02,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 534 states, 533 states have (on average 1.5834896810506567) internal successors, (844), 533 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:55:02,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 844 transitions. [2021-11-20 22:55:02,987 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 844 transitions. Word has length 145 [2021-11-20 22:55:02,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:55:02,988 INFO L470 AbstractCegarLoop]: Abstraction has 534 states and 844 transitions. [2021-11-20 22:55:02,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 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) [2021-11-20 22:55:02,988 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 844 transitions. [2021-11-20 22:55:02,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-20 22:55:02,989 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:55:02,989 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:55:02,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2021-11-20 22:55:02,989 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:55:02,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:55:02,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1350402612, now seen corresponding path program 1 times [2021-11-20 22:55:02,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:55:02,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400765336] [2021-11-20 22:55:02,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:55:02,990 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:55:03,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:55:03,066 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 158 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-20 22:55:03,067 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:55:03,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400765336] [2021-11-20 22:55:03,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400765336] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:55:03,067 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:55:03,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 22:55:03,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060095887] [2021-11-20 22:55:03,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:55:03,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:55:03,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:55:03,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:55:03,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:55:03,070 INFO L87 Difference]: Start difference. First operand 534 states and 844 transitions. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:55:05,083 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:55:05,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:55:05,392 INFO L93 Difference]: Finished difference Result 1081 states and 1708 transitions. [2021-11-20 22:55:05,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:55:05,393 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 146 [2021-11-20 22:55:05,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:55:05,394 INFO L225 Difference]: With dead ends: 1081 [2021-11-20 22:55:05,394 INFO L226 Difference]: Without dead ends: 559 [2021-11-20 22:55:05,395 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:55:05,395 INFO L933 BasicCegarLoop]: 148 mSDtfsCounter, 51 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 22:55:05,395 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 367 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 200 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 22:55:05,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-11-20 22:55:05,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 534. [2021-11-20 22:55:05,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 534 states, 533 states have (on average 1.5816135084427767) internal successors, (843), 533 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:55:05,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 843 transitions. [2021-11-20 22:55:05,417 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 843 transitions. Word has length 146 [2021-11-20 22:55:05,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:55:05,417 INFO L470 AbstractCegarLoop]: Abstraction has 534 states and 843 transitions. [2021-11-20 22:55:05,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:55:05,417 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 843 transitions. [2021-11-20 22:55:05,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-20 22:55:05,418 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:55:05,418 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] [2021-11-20 22:55:05,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2021-11-20 22:55:05,418 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:55:05,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:55:05,419 INFO L85 PathProgramCache]: Analyzing trace with hash -1552859277, now seen corresponding path program 1 times [2021-11-20 22:55:05,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:55:05,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928795114] [2021-11-20 22:55:05,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:55:05,419 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:55:05,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:55:05,514 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:55:05,514 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:55:05,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928795114] [2021-11-20 22:55:05,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928795114] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 22:55:05,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960522217] [2021-11-20 22:55:05,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:55:05,515 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:55:05,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:55:05,524 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:55:05,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 22:55:05,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:55:05,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 588 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 22:55:05,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:55:06,396 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:55:06,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:55:07,740 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 189 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:55:07,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960522217] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 22:55:07,741 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-20 22:55:07,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 10 [2021-11-20 22:55:07,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767983194] [2021-11-20 22:55:07,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:55:07,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 22:55:07,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:55:07,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 22:55:07,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-11-20 22:55:07,745 INFO L87 Difference]: Start difference. First operand 534 states and 843 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 6 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:55:09,757 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:55:10,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:55:10,151 INFO L93 Difference]: Finished difference Result 2050 states and 3241 transitions. [2021-11-20 22:55:10,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 22:55:10,151 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 6 states have internal predecessors, (146), 0 states have call successors, (0), 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 146 [2021-11-20 22:55:10,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:55:10,154 INFO L225 Difference]: With dead ends: 2050 [2021-11-20 22:55:10,154 INFO L226 Difference]: Without dead ends: 2048 [2021-11-20 22:55:10,154 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 287 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-11-20 22:55:10,155 INFO L933 BasicCegarLoop]: 444 mSDtfsCounter, 484 mSDsluCounter, 764 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 15 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 484 SdHoareTripleChecker+Valid, 1160 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 22:55:10,155 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [484 Valid, 1160 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 123 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 22:55:10,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2048 states. [2021-11-20 22:55:10,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2048 to 1995. [2021-11-20 22:55:10,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1995 states, 1994 states have (on average 1.5937813440320963) internal successors, (3178), 1994 states have internal predecessors, (3178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:55:10,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1995 states to 1995 states and 3178 transitions. [2021-11-20 22:55:10,272 INFO L78 Accepts]: Start accepts. Automaton has 1995 states and 3178 transitions. Word has length 146 [2021-11-20 22:55:10,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:55:10,272 INFO L470 AbstractCegarLoop]: Abstraction has 1995 states and 3178 transitions. [2021-11-20 22:55:10,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 6 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:55:10,273 INFO L276 IsEmpty]: Start isEmpty. Operand 1995 states and 3178 transitions. [2021-11-20 22:55:10,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-20 22:55:10,275 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:55:10,275 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:55:10,314 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 22:55:10,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:55:10,492 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:55:10,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:55:10,500 INFO L85 PathProgramCache]: Analyzing trace with hash -894150337, now seen corresponding path program 1 times [2021-11-20 22:55:10,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:55:10,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304857951] [2021-11-20 22:55:10,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:55:10,501 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:55:10,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:55:10,576 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 164 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-20 22:55:10,576 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:55:10,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304857951] [2021-11-20 22:55:10,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304857951] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:55:10,577 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:55:10,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 22:55:10,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819055236] [2021-11-20 22:55:10,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:55:10,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:55:10,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:55:10,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:55:10,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:55:10,580 INFO L87 Difference]: Start difference. First operand 1995 states and 3178 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) [2021-11-20 22:55:12,595 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:55:13,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:55:13,034 INFO L93 Difference]: Finished difference Result 4078 states and 6472 transitions. [2021-11-20 22:55:13,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:55:13,035 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 147 [2021-11-20 22:55:13,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:55:13,037 INFO L225 Difference]: With dead ends: 4078 [2021-11-20 22:55:13,037 INFO L226 Difference]: Without dead ends: 2095 [2021-11-20 22:55:13,038 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:55:13,039 INFO L933 BasicCegarLoop]: 148 mSDtfsCounter, 49 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 22:55:13,039 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 367 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 200 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 22:55:13,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2095 states. [2021-11-20 22:55:13,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2095 to 1995. [2021-11-20 22:55:13,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1995 states, 1994 states have (on average 1.5917753259779337) internal successors, (3174), 1994 states have internal predecessors, (3174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:55:13,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1995 states to 1995 states and 3174 transitions. [2021-11-20 22:55:13,157 INFO L78 Accepts]: Start accepts. Automaton has 1995 states and 3174 transitions. Word has length 147 [2021-11-20 22:55:13,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:55:13,157 INFO L470 AbstractCegarLoop]: Abstraction has 1995 states and 3174 transitions. [2021-11-20 22:55:13,157 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) [2021-11-20 22:55:13,157 INFO L276 IsEmpty]: Start isEmpty. Operand 1995 states and 3174 transitions. [2021-11-20 22:55:13,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-20 22:55:13,160 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:55:13,160 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:55:13,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2021-11-20 22:55:13,160 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:55:13,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:55:13,161 INFO L85 PathProgramCache]: Analyzing trace with hash 2115965805, now seen corresponding path program 1 times [2021-11-20 22:55:13,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:55:13,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973813365] [2021-11-20 22:55:13,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:55:13,162 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:55:13,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:55:13,225 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 158 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-20 22:55:13,225 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:55:13,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973813365] [2021-11-20 22:55:13,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973813365] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:55:13,226 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:55:13,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 22:55:13,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437385653] [2021-11-20 22:55:13,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:55:13,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:55:13,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:55:13,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:55:13,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:55:13,228 INFO L87 Difference]: Start difference. First operand 1995 states and 3174 transitions. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:55:15,239 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:55:15,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:55:15,738 INFO L93 Difference]: Finished difference Result 3640 states and 5750 transitions. [2021-11-20 22:55:15,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:55:15,739 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 147 [2021-11-20 22:55:15,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:55:15,742 INFO L225 Difference]: With dead ends: 3640 [2021-11-20 22:55:15,742 INFO L226 Difference]: Without dead ends: 2117 [2021-11-20 22:55:15,743 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:55:15,744 INFO L933 BasicCegarLoop]: 185 mSDtfsCounter, 84 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 22:55:15,744 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 440 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 259 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-20 22:55:15,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2117 states. [2021-11-20 22:55:15,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2117 to 1995. [2021-11-20 22:55:15,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1995 states, 1994 states have (on average 1.590270812437312) internal successors, (3171), 1994 states have internal predecessors, (3171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:55:15,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1995 states to 1995 states and 3171 transitions. [2021-11-20 22:55:15,860 INFO L78 Accepts]: Start accepts. Automaton has 1995 states and 3171 transitions. Word has length 147 [2021-11-20 22:55:15,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:55:15,861 INFO L470 AbstractCegarLoop]: Abstraction has 1995 states and 3171 transitions. [2021-11-20 22:55:15,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:55:15,861 INFO L276 IsEmpty]: Start isEmpty. Operand 1995 states and 3171 transitions. [2021-11-20 22:55:15,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-20 22:55:15,862 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:55:15,863 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:55:15,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2021-11-20 22:55:15,863 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:55:15,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:55:15,863 INFO L85 PathProgramCache]: Analyzing trace with hash -591158183, now seen corresponding path program 1 times [2021-11-20 22:55:15,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:55:15,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803614885] [2021-11-20 22:55:15,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:55:15,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:55:15,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:55:15,924 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 170 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-20 22:55:15,924 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:55:15,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803614885] [2021-11-20 22:55:15,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803614885] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:55:15,924 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:55:15,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 22:55:15,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439043114] [2021-11-20 22:55:15,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:55:15,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:55:15,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:55:15,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:55:15,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:55:15,926 INFO L87 Difference]: Start difference. First operand 1995 states and 3171 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) [2021-11-20 22:55:17,942 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:55:18,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:55:18,334 INFO L93 Difference]: Finished difference Result 4046 states and 6422 transitions. [2021-11-20 22:55:18,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:55:18,335 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 148 [2021-11-20 22:55:18,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:55:18,339 INFO L225 Difference]: With dead ends: 4046 [2021-11-20 22:55:18,339 INFO L226 Difference]: Without dead ends: 2063 [2021-11-20 22:55:18,341 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:55:18,342 INFO L933 BasicCegarLoop]: 152 mSDtfsCounter, 43 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 22:55:18,342 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 375 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 192 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 22:55:18,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2063 states. [2021-11-20 22:55:18,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2063 to 1995. [2021-11-20 22:55:18,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1995 states, 1994 states have (on average 1.5882647943831494) internal successors, (3167), 1994 states have internal predecessors, (3167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:55:18,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1995 states to 1995 states and 3167 transitions. [2021-11-20 22:55:18,437 INFO L78 Accepts]: Start accepts. Automaton has 1995 states and 3167 transitions. Word has length 148 [2021-11-20 22:55:18,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:55:18,437 INFO L470 AbstractCegarLoop]: Abstraction has 1995 states and 3167 transitions. [2021-11-20 22:55:18,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:55:18,437 INFO L276 IsEmpty]: Start isEmpty. Operand 1995 states and 3167 transitions. [2021-11-20 22:55:18,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-20 22:55:18,439 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:55:18,439 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:55:18,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2021-11-20 22:55:18,439 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:55:18,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:55:18,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1640594099, now seen corresponding path program 1 times [2021-11-20 22:55:18,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:55:18,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669212278] [2021-11-20 22:55:18,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:55:18,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:55:18,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:55:18,504 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 163 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-20 22:55:18,504 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:55:18,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669212278] [2021-11-20 22:55:18,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669212278] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:55:18,505 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:55:18,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 22:55:18,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779025418] [2021-11-20 22:55:18,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:55:18,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:55:18,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:55:18,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:55:18,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:55:18,507 INFO L87 Difference]: Start difference. First operand 1995 states and 3167 transitions. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:55:20,518 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:55:21,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:55:21,005 INFO L93 Difference]: Finished difference Result 3634 states and 5731 transitions. [2021-11-20 22:55:21,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:55:21,007 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 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 148 [2021-11-20 22:55:21,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:55:21,011 INFO L225 Difference]: With dead ends: 3634 [2021-11-20 22:55:21,011 INFO L226 Difference]: Without dead ends: 2111 [2021-11-20 22:55:21,013 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:55:21,013 INFO L933 BasicCegarLoop]: 185 mSDtfsCounter, 82 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 22:55:21,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 440 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 254 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-20 22:55:21,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2111 states. [2021-11-20 22:55:21,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2111 to 1995. [2021-11-20 22:55:21,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1995 states, 1994 states have (on average 1.5867602808425276) internal successors, (3164), 1994 states have internal predecessors, (3164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:55:21,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1995 states to 1995 states and 3164 transitions. [2021-11-20 22:55:21,092 INFO L78 Accepts]: Start accepts. Automaton has 1995 states and 3164 transitions. Word has length 148 [2021-11-20 22:55:21,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:55:21,092 INFO L470 AbstractCegarLoop]: Abstraction has 1995 states and 3164 transitions. [2021-11-20 22:55:21,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:55:21,093 INFO L276 IsEmpty]: Start isEmpty. Operand 1995 states and 3164 transitions. [2021-11-20 22:55:21,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-20 22:55:21,094 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:55:21,094 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:55:21,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2021-11-20 22:55:21,095 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:55:21,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:55:21,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1674820201, now seen corresponding path program 1 times [2021-11-20 22:55:21,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:55:21,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212795492] [2021-11-20 22:55:21,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:55:21,095 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:55:21,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:55:21,201 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 164 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-11-20 22:55:21,202 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:55:21,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212795492] [2021-11-20 22:55:21,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212795492] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:55:21,202 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:55:21,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 22:55:21,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976658643] [2021-11-20 22:55:21,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:55:21,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 22:55:21,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:55:21,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 22:55:21,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 22:55:21,204 INFO L87 Difference]: Start difference. First operand 1995 states and 3164 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) [2021-11-20 22:55:23,213 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:55:23,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:55:23,724 INFO L93 Difference]: Finished difference Result 4049 states and 6399 transitions. [2021-11-20 22:55:23,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 22:55:23,725 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 150 [2021-11-20 22:55:23,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:55:23,729 INFO L225 Difference]: With dead ends: 4049 [2021-11-20 22:55:23,729 INFO L226 Difference]: Without dead ends: 2066 [2021-11-20 22:55:23,731 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-20 22:55:23,731 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 94 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 22:55:23,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 419 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 308 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-20 22:55:23,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2066 states. [2021-11-20 22:55:23,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2066 to 1995. [2021-11-20 22:55:23,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1995 states, 1994 states have (on average 1.584754262788365) internal successors, (3160), 1994 states have internal predecessors, (3160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:55:23,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1995 states to 1995 states and 3160 transitions. [2021-11-20 22:55:23,853 INFO L78 Accepts]: Start accepts. Automaton has 1995 states and 3160 transitions. Word has length 150 [2021-11-20 22:55:23,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:55:23,854 INFO L470 AbstractCegarLoop]: Abstraction has 1995 states and 3160 transitions. [2021-11-20 22:55:23,854 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) [2021-11-20 22:55:23,854 INFO L276 IsEmpty]: Start isEmpty. Operand 1995 states and 3160 transitions. [2021-11-20 22:55:23,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-20 22:55:23,857 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:55:23,857 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:55:23,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2021-11-20 22:55:23,857 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:55:23,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:55:23,858 INFO L85 PathProgramCache]: Analyzing trace with hash -478615461, now seen corresponding path program 1 times [2021-11-20 22:55:23,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:55:23,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144439932] [2021-11-20 22:55:23,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:55:23,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:55:23,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:55:23,939 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 165 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-20 22:55:23,939 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:55:23,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144439932] [2021-11-20 22:55:23,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144439932] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:55:23,939 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:55:23,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 22:55:23,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49768973] [2021-11-20 22:55:23,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:55:23,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:55:23,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:55:23,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:55:23,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:55:23,941 INFO L87 Difference]: Start difference. First operand 1995 states and 3160 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 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) [2021-11-20 22:55:25,952 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:55:26,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:55:26,272 INFO L93 Difference]: Finished difference Result 4018 states and 6352 transitions. [2021-11-20 22:55:26,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:55:26,273 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 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 150 [2021-11-20 22:55:26,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:55:26,277 INFO L225 Difference]: With dead ends: 4018 [2021-11-20 22:55:26,277 INFO L226 Difference]: Without dead ends: 2035 [2021-11-20 22:55:26,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:55:26,280 INFO L933 BasicCegarLoop]: 148 mSDtfsCounter, 25 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-20 22:55:26,280 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 367 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 155 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-11-20 22:55:26,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2035 states. [2021-11-20 22:55:26,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2035 to 1995. [2021-11-20 22:55:26,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1995 states, 1994 states have (on average 1.5827482447342025) internal successors, (3156), 1994 states have internal predecessors, (3156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:55:26,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1995 states to 1995 states and 3156 transitions. [2021-11-20 22:55:26,426 INFO L78 Accepts]: Start accepts. Automaton has 1995 states and 3156 transitions. Word has length 150 [2021-11-20 22:55:26,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:55:26,426 INFO L470 AbstractCegarLoop]: Abstraction has 1995 states and 3156 transitions. [2021-11-20 22:55:26,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 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) [2021-11-20 22:55:26,427 INFO L276 IsEmpty]: Start isEmpty. Operand 1995 states and 3156 transitions. [2021-11-20 22:55:26,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-20 22:55:26,429 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:55:26,429 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:55:26,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2021-11-20 22:55:26,430 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:55:26,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:55:26,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1598830669, now seen corresponding path program 1 times [2021-11-20 22:55:26,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:55:26,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516415884] [2021-11-20 22:55:26,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:55:26,431 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:55:26,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:55:26,535 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 167 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-11-20 22:55:26,535 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:55:26,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516415884] [2021-11-20 22:55:26,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516415884] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:55:26,536 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:55:26,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 22:55:26,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975530985] [2021-11-20 22:55:26,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:55:26,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 22:55:26,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:55:26,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 22:55:26,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 22:55:26,537 INFO L87 Difference]: Start difference. First operand 1995 states and 3156 transitions. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:55:28,549 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:55:29,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:55:29,157 INFO L93 Difference]: Finished difference Result 4045 states and 6379 transitions. [2021-11-20 22:55:29,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 22:55:29,158 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 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 151 [2021-11-20 22:55:29,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:55:29,160 INFO L225 Difference]: With dead ends: 4045 [2021-11-20 22:55:29,160 INFO L226 Difference]: Without dead ends: 2062 [2021-11-20 22:55:29,162 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-20 22:55:29,162 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 44 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-20 22:55:29,162 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 503 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 410 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2021-11-20 22:55:29,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2062 states. [2021-11-20 22:55:29,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2062 to 1995. [2021-11-20 22:55:29,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1995 states, 1994 states have (on average 1.5807422266800402) internal successors, (3152), 1994 states have internal predecessors, (3152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:55:29,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1995 states to 1995 states and 3152 transitions. [2021-11-20 22:55:29,255 INFO L78 Accepts]: Start accepts. Automaton has 1995 states and 3152 transitions. Word has length 151 [2021-11-20 22:55:29,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:55:29,255 INFO L470 AbstractCegarLoop]: Abstraction has 1995 states and 3152 transitions. [2021-11-20 22:55:29,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:55:29,256 INFO L276 IsEmpty]: Start isEmpty. Operand 1995 states and 3152 transitions. [2021-11-20 22:55:29,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-20 22:55:29,257 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:55:29,257 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:55:29,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2021-11-20 22:55:29,258 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:55:29,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:55:29,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1371174707, now seen corresponding path program 1 times [2021-11-20 22:55:29,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:55:29,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153552105] [2021-11-20 22:55:29,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:55:29,259 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:55:29,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:55:29,309 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 171 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-20 22:55:29,309 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:55:29,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153552105] [2021-11-20 22:55:29,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153552105] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:55:29,310 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:55:29,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 22:55:29,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976411587] [2021-11-20 22:55:29,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:55:29,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:55:29,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:55:29,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:55:29,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:55:29,311 INFO L87 Difference]: Start difference. First operand 1995 states and 3152 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) [2021-11-20 22:55:31,320 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:55:31,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:55:31,662 INFO L93 Difference]: Finished difference Result 4018 states and 6336 transitions. [2021-11-20 22:55:31,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:55:31,663 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 151 [2021-11-20 22:55:31,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:55:31,669 INFO L225 Difference]: With dead ends: 4018 [2021-11-20 22:55:31,669 INFO L226 Difference]: Without dead ends: 2035 [2021-11-20 22:55:31,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:55:31,671 INFO L933 BasicCegarLoop]: 156 mSDtfsCounter, 23 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 22:55:31,672 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 383 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 158 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 22:55:31,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2035 states. [2021-11-20 22:55:31,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2035 to 1995. [2021-11-20 22:55:31,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1995 states, 1994 states have (on average 1.5787362086258776) internal successors, (3148), 1994 states have internal predecessors, (3148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:55:31,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1995 states to 1995 states and 3148 transitions. [2021-11-20 22:55:31,788 INFO L78 Accepts]: Start accepts. Automaton has 1995 states and 3148 transitions. Word has length 151 [2021-11-20 22:55:31,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:55:31,788 INFO L470 AbstractCegarLoop]: Abstraction has 1995 states and 3148 transitions. [2021-11-20 22:55:31,788 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) [2021-11-20 22:55:31,788 INFO L276 IsEmpty]: Start isEmpty. Operand 1995 states and 3148 transitions. [2021-11-20 22:55:31,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-20 22:55:31,790 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:55:31,790 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:55:31,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2021-11-20 22:55:31,791 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:55:31,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:55:31,791 INFO L85 PathProgramCache]: Analyzing trace with hash -917831750, now seen corresponding path program 1 times [2021-11-20 22:55:31,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:55:31,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630876434] [2021-11-20 22:55:31,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:55:31,792 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:55:31,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:55:31,841 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 165 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-20 22:55:31,841 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:55:31,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630876434] [2021-11-20 22:55:31,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630876434] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:55:31,842 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:55:31,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 22:55:31,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977764909] [2021-11-20 22:55:31,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:55:31,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:55:31,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:55:31,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:55:31,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:55:31,843 INFO L87 Difference]: Start difference. First operand 1995 states and 3148 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) [2021-11-20 22:55:33,863 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:55:34,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:55:34,300 INFO L93 Difference]: Finished difference Result 4110 states and 6448 transitions. [2021-11-20 22:55:34,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:55:34,300 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 151 [2021-11-20 22:55:34,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:55:34,302 INFO L225 Difference]: With dead ends: 4110 [2021-11-20 22:55:34,303 INFO L226 Difference]: Without dead ends: 2127 [2021-11-20 22:55:34,304 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:55:34,304 INFO L933 BasicCegarLoop]: 161 mSDtfsCounter, 71 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 22:55:34,305 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 393 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 226 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 22:55:34,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2127 states. [2021-11-20 22:55:34,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2127 to 1995. [2021-11-20 22:55:34,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1995 states, 1994 states have (on average 1.576730190571715) internal successors, (3144), 1994 states have internal predecessors, (3144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:55:34,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1995 states to 1995 states and 3144 transitions. [2021-11-20 22:55:34,449 INFO L78 Accepts]: Start accepts. Automaton has 1995 states and 3144 transitions. Word has length 151 [2021-11-20 22:55:34,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:55:34,450 INFO L470 AbstractCegarLoop]: Abstraction has 1995 states and 3144 transitions. [2021-11-20 22:55:34,450 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) [2021-11-20 22:55:34,450 INFO L276 IsEmpty]: Start isEmpty. Operand 1995 states and 3144 transitions. [2021-11-20 22:55:34,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-11-20 22:55:34,453 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:55:34,453 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:55:34,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2021-11-20 22:55:34,453 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:55:34,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:55:34,454 INFO L85 PathProgramCache]: Analyzing trace with hash -250215392, now seen corresponding path program 1 times [2021-11-20 22:55:34,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:55:34,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161568973] [2021-11-20 22:55:34,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:55:34,454 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:55:34,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:55:34,519 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 177 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-20 22:55:34,519 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:55:34,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161568973] [2021-11-20 22:55:34,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161568973] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:55:34,520 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:55:34,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 22:55:34,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40495705] [2021-11-20 22:55:34,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:55:34,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:55:34,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:55:34,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:55:34,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:55:34,523 INFO L87 Difference]: Start difference. First operand 1995 states and 3144 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) [2021-11-20 22:55:36,537 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:55:36,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:55:36,856 INFO L93 Difference]: Finished difference Result 4018 states and 6320 transitions. [2021-11-20 22:55:36,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:55:36,857 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 152 [2021-11-20 22:55:36,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:55:36,859 INFO L225 Difference]: With dead ends: 4018 [2021-11-20 22:55:36,859 INFO L226 Difference]: Without dead ends: 2035 [2021-11-20 22:55:36,861 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:55:36,861 INFO L933 BasicCegarLoop]: 156 mSDtfsCounter, 21 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-20 22:55:36,861 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 383 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 158 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-11-20 22:55:36,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2035 states. [2021-11-20 22:55:36,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2035 to 1995. [2021-11-20 22:55:36,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1995 states, 1994 states have (on average 1.5747241725175527) internal successors, (3140), 1994 states have internal predecessors, (3140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:55:36,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1995 states to 1995 states and 3140 transitions. [2021-11-20 22:55:36,957 INFO L78 Accepts]: Start accepts. Automaton has 1995 states and 3140 transitions. Word has length 152 [2021-11-20 22:55:36,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:55:36,957 INFO L470 AbstractCegarLoop]: Abstraction has 1995 states and 3140 transitions. [2021-11-20 22:55:36,957 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) [2021-11-20 22:55:36,957 INFO L276 IsEmpty]: Start isEmpty. Operand 1995 states and 3140 transitions. [2021-11-20 22:55:36,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-11-20 22:55:36,959 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:55:36,959 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:55:36,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2021-11-20 22:55:36,959 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:55:36,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:55:36,960 INFO L85 PathProgramCache]: Analyzing trace with hash 640371636, now seen corresponding path program 1 times [2021-11-20 22:55:36,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:55:36,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229646575] [2021-11-20 22:55:36,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:55:36,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:55:36,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:55:37,023 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 171 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-20 22:55:37,024 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:55:37,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229646575] [2021-11-20 22:55:37,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229646575] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:55:37,024 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:55:37,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 22:55:37,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446577177] [2021-11-20 22:55:37,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:55:37,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:55:37,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:55:37,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:55:37,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:55:37,026 INFO L87 Difference]: Start difference. First operand 1995 states and 3140 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) [2021-11-20 22:55:39,035 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:55:39,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:55:39,488 INFO L93 Difference]: Finished difference Result 4110 states and 6432 transitions. [2021-11-20 22:55:39,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:55:39,489 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 152 [2021-11-20 22:55:39,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:55:39,490 INFO L225 Difference]: With dead ends: 4110 [2021-11-20 22:55:39,491 INFO L226 Difference]: Without dead ends: 2127 [2021-11-20 22:55:39,492 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:55:39,493 INFO L933 BasicCegarLoop]: 160 mSDtfsCounter, 69 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 22:55:39,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 391 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 226 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 22:55:39,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2127 states. [2021-11-20 22:55:39,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2127 to 1995. [2021-11-20 22:55:39,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1995 states, 1994 states have (on average 1.5727181544633901) internal successors, (3136), 1994 states have internal predecessors, (3136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:55:39,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1995 states to 1995 states and 3136 transitions. [2021-11-20 22:55:39,612 INFO L78 Accepts]: Start accepts. Automaton has 1995 states and 3136 transitions. Word has length 152 [2021-11-20 22:55:39,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:55:39,613 INFO L470 AbstractCegarLoop]: Abstraction has 1995 states and 3136 transitions. [2021-11-20 22:55:39,613 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) [2021-11-20 22:55:39,613 INFO L276 IsEmpty]: Start isEmpty. Operand 1995 states and 3136 transitions. [2021-11-20 22:55:39,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-11-20 22:55:39,616 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:55:39,616 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:55:39,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2021-11-20 22:55:39,616 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:55:39,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:55:39,617 INFO L85 PathProgramCache]: Analyzing trace with hash -2104011368, now seen corresponding path program 1 times [2021-11-20 22:55:39,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:55:39,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171187291] [2021-11-20 22:55:39,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:55:39,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:55:39,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:55:39,683 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 183 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-20 22:55:39,683 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:55:39,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171187291] [2021-11-20 22:55:39,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171187291] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:55:39,683 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:55:39,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 22:55:39,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795130158] [2021-11-20 22:55:39,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:55:39,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:55:39,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:55:39,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:55:39,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:55:39,684 INFO L87 Difference]: Start difference. First operand 1995 states and 3136 transitions. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 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) [2021-11-20 22:55:41,692 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:55:42,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:55:42,003 INFO L93 Difference]: Finished difference Result 3986 states and 6268 transitions. [2021-11-20 22:55:42,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:55:42,004 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 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 153 [2021-11-20 22:55:42,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:55:42,005 INFO L225 Difference]: With dead ends: 3986 [2021-11-20 22:55:42,006 INFO L226 Difference]: Without dead ends: 2003 [2021-11-20 22:55:42,007 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:55:42,007 INFO L933 BasicCegarLoop]: 152 mSDtfsCounter, 15 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-20 22:55:42,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 375 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 147 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-11-20 22:55:42,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2003 states. [2021-11-20 22:55:42,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2003 to 1995. [2021-11-20 22:55:42,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1995 states, 1994 states have (on average 1.5707121364092276) internal successors, (3132), 1994 states have internal predecessors, (3132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:55:42,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1995 states to 1995 states and 3132 transitions. [2021-11-20 22:55:42,094 INFO L78 Accepts]: Start accepts. Automaton has 1995 states and 3132 transitions. Word has length 153 [2021-11-20 22:55:42,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:55:42,095 INFO L470 AbstractCegarLoop]: Abstraction has 1995 states and 3132 transitions. [2021-11-20 22:55:42,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 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) [2021-11-20 22:55:42,095 INFO L276 IsEmpty]: Start isEmpty. Operand 1995 states and 3132 transitions. [2021-11-20 22:55:42,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-11-20 22:55:42,096 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:55:42,097 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:55:42,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2021-11-20 22:55:42,097 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:55:42,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:55:42,097 INFO L85 PathProgramCache]: Analyzing trace with hash 1864289366, now seen corresponding path program 1 times [2021-11-20 22:55:42,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:55:42,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867426210] [2021-11-20 22:55:42,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:55:42,097 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:55:42,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:55:42,150 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 203 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-20 22:55:42,150 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:55:42,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867426210] [2021-11-20 22:55:42,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867426210] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:55:42,151 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:55:42,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 22:55:42,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942626788] [2021-11-20 22:55:42,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:55:42,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:55:42,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:55:42,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:55:42,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:55:42,152 INFO L87 Difference]: Start difference. First operand 1995 states and 3132 transitions. Second operand has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:55:44,161 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:55:44,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:55:44,610 INFO L93 Difference]: Finished difference Result 4110 states and 6416 transitions. [2021-11-20 22:55:44,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:55:44,611 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 153 [2021-11-20 22:55:44,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:55:44,613 INFO L225 Difference]: With dead ends: 4110 [2021-11-20 22:55:44,613 INFO L226 Difference]: Without dead ends: 2127 [2021-11-20 22:55:44,614 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:55:44,614 INFO L933 BasicCegarLoop]: 151 mSDtfsCounter, 51 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 22:55:44,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 373 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 223 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 22:55:44,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2127 states. [2021-11-20 22:55:44,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2127 to 1995. [2021-11-20 22:55:44,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1995 states, 1994 states have (on average 1.5687061183550652) internal successors, (3128), 1994 states have internal predecessors, (3128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:55:44,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1995 states to 1995 states and 3128 transitions. [2021-11-20 22:55:44,688 INFO L78 Accepts]: Start accepts. Automaton has 1995 states and 3128 transitions. Word has length 153 [2021-11-20 22:55:44,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:55:44,688 INFO L470 AbstractCegarLoop]: Abstraction has 1995 states and 3128 transitions. [2021-11-20 22:55:44,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:55:44,688 INFO L276 IsEmpty]: Start isEmpty. Operand 1995 states and 3128 transitions. [2021-11-20 22:55:44,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-11-20 22:55:44,690 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:55:44,690 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:55:44,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2021-11-20 22:55:44,690 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:55:44,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:55:44,691 INFO L85 PathProgramCache]: Analyzing trace with hash -1430274113, now seen corresponding path program 1 times [2021-11-20 22:55:44,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:55:44,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499107609] [2021-11-20 22:55:44,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:55:44,691 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:55:44,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:55:44,755 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 177 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-20 22:55:44,755 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:55:44,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499107609] [2021-11-20 22:55:44,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499107609] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:55:44,756 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:55:44,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 22:55:44,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914802403] [2021-11-20 22:55:44,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:55:44,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:55:44,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:55:44,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:55:44,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:55:44,757 INFO L87 Difference]: Start difference. First operand 1995 states and 3128 transitions. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 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) [2021-11-20 22:55:46,769 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:55:47,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:55:47,323 INFO L93 Difference]: Finished difference Result 4110 states and 6408 transitions. [2021-11-20 22:55:47,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:55:47,324 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 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 153 [2021-11-20 22:55:47,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:55:47,326 INFO L225 Difference]: With dead ends: 4110 [2021-11-20 22:55:47,326 INFO L226 Difference]: Without dead ends: 2127 [2021-11-20 22:55:47,327 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:55:47,328 INFO L933 BasicCegarLoop]: 151 mSDtfsCounter, 66 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 22:55:47,328 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 373 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 223 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-20 22:55:47,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2127 states. [2021-11-20 22:55:47,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2127 to 1995. [2021-11-20 22:55:47,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1995 states, 1994 states have (on average 1.5667001003009027) internal successors, (3124), 1994 states have internal predecessors, (3124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:55:47,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1995 states to 1995 states and 3124 transitions. [2021-11-20 22:55:47,418 INFO L78 Accepts]: Start accepts. Automaton has 1995 states and 3124 transitions. Word has length 153 [2021-11-20 22:55:47,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:55:47,418 INFO L470 AbstractCegarLoop]: Abstraction has 1995 states and 3124 transitions. [2021-11-20 22:55:47,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 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) [2021-11-20 22:55:47,418 INFO L276 IsEmpty]: Start isEmpty. Operand 1995 states and 3124 transitions. [2021-11-20 22:55:47,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-20 22:55:47,420 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:55:47,420 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:55:47,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2021-11-20 22:55:47,420 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:55:47,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:55:47,420 INFO L85 PathProgramCache]: Analyzing trace with hash -31126055, now seen corresponding path program 1 times [2021-11-20 22:55:47,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:55:47,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624253536] [2021-11-20 22:55:47,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:55:47,421 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:55:47,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:55:47,475 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 183 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-20 22:55:47,476 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:55:47,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624253536] [2021-11-20 22:55:47,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624253536] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:55:47,476 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:55:47,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 22:55:47,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516614866] [2021-11-20 22:55:47,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:55:47,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:55:47,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:55:47,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:55:47,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:55:47,478 INFO L87 Difference]: Start difference. First operand 1995 states and 3124 transitions. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:55:49,497 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:55:49,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:55:49,936 INFO L93 Difference]: Finished difference Result 4078 states and 6364 transitions. [2021-11-20 22:55:49,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:55:49,937 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 154 [2021-11-20 22:55:49,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:55:49,938 INFO L225 Difference]: With dead ends: 4078 [2021-11-20 22:55:49,938 INFO L226 Difference]: Without dead ends: 2095 [2021-11-20 22:55:49,940 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:55:49,940 INFO L933 BasicCegarLoop]: 155 mSDtfsCounter, 60 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 22:55:49,941 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 381 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 215 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 22:55:49,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2095 states. [2021-11-20 22:55:50,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2095 to 1995. [2021-11-20 22:55:50,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1995 states, 1994 states have (on average 1.5646940822467401) internal successors, (3120), 1994 states have internal predecessors, (3120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:55:50,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1995 states to 1995 states and 3120 transitions. [2021-11-20 22:55:50,017 INFO L78 Accepts]: Start accepts. Automaton has 1995 states and 3120 transitions. Word has length 154 [2021-11-20 22:55:50,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:55:50,018 INFO L470 AbstractCegarLoop]: Abstraction has 1995 states and 3120 transitions. [2021-11-20 22:55:50,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:55:50,018 INFO L276 IsEmpty]: Start isEmpty. Operand 1995 states and 3120 transitions. [2021-11-20 22:55:50,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-20 22:55:50,020 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:55:50,020 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:55:50,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2021-11-20 22:55:50,020 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:55:50,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:55:50,020 INFO L85 PathProgramCache]: Analyzing trace with hash -461865104, now seen corresponding path program 1 times [2021-11-20 22:55:50,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:55:50,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056311629] [2021-11-20 22:55:50,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:55:50,021 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:55:50,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:55:50,071 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 206 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-20 22:55:50,071 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:55:50,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056311629] [2021-11-20 22:55:50,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056311629] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:55:50,072 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:55:50,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 22:55:50,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20188195] [2021-11-20 22:55:50,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:55:50,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:55:50,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:55:50,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:55:50,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:55:50,072 INFO L87 Difference]: Start difference. First operand 1995 states and 3120 transitions. Second operand has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:55:52,083 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:55:52,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:55:52,504 INFO L93 Difference]: Finished difference Result 4070 states and 6348 transitions. [2021-11-20 22:55:52,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:55:52,505 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 154 [2021-11-20 22:55:52,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:55:52,507 INFO L225 Difference]: With dead ends: 4070 [2021-11-20 22:55:52,507 INFO L226 Difference]: Without dead ends: 2087 [2021-11-20 22:55:52,508 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:55:52,509 INFO L933 BasicCegarLoop]: 156 mSDtfsCounter, 42 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 22:55:52,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 383 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 213 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 22:55:52,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2087 states. [2021-11-20 22:55:52,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2087 to 1995. [2021-11-20 22:55:52,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1995 states, 1994 states have (on average 1.5626880641925778) internal successors, (3116), 1994 states have internal predecessors, (3116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:55:52,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1995 states to 1995 states and 3116 transitions. [2021-11-20 22:55:52,597 INFO L78 Accepts]: Start accepts. Automaton has 1995 states and 3116 transitions. Word has length 154 [2021-11-20 22:55:52,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:55:52,597 INFO L470 AbstractCegarLoop]: Abstraction has 1995 states and 3116 transitions. [2021-11-20 22:55:52,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:55:52,597 INFO L276 IsEmpty]: Start isEmpty. Operand 1995 states and 3116 transitions. [2021-11-20 22:55:52,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-20 22:55:52,599 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:55:52,599 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:55:52,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2021-11-20 22:55:52,599 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:55:52,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:55:52,599 INFO L85 PathProgramCache]: Analyzing trace with hash -354857193, now seen corresponding path program 1 times [2021-11-20 22:55:52,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:55:52,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824440468] [2021-11-20 22:55:52,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:55:52,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:55:52,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:55:52,651 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 197 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-20 22:55:52,651 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:55:52,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824440468] [2021-11-20 22:55:52,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824440468] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:55:52,652 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:55:52,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 22:55:52,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833271263] [2021-11-20 22:55:52,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:55:52,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:55:52,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:55:52,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:55:52,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:55:52,653 INFO L87 Difference]: Start difference. First operand 1995 states and 3116 transitions. Second operand has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:55:54,665 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:55:55,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:55:55,102 INFO L93 Difference]: Finished difference Result 4070 states and 6340 transitions. [2021-11-20 22:55:55,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:55:55,103 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 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 156 [2021-11-20 22:55:55,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:55:55,106 INFO L225 Difference]: With dead ends: 4070 [2021-11-20 22:55:55,106 INFO L226 Difference]: Without dead ends: 2087 [2021-11-20 22:55:55,108 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:55:55,108 INFO L933 BasicCegarLoop]: 156 mSDtfsCounter, 44 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 22:55:55,108 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 383 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 213 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 22:55:55,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2087 states. [2021-11-20 22:55:55,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2087 to 1995. [2021-11-20 22:55:55,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1995 states, 1994 states have (on average 1.5606820461384152) internal successors, (3112), 1994 states have internal predecessors, (3112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:55:55,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1995 states to 1995 states and 3112 transitions. [2021-11-20 22:55:55,187 INFO L78 Accepts]: Start accepts. Automaton has 1995 states and 3112 transitions. Word has length 156 [2021-11-20 22:55:55,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:55:55,187 INFO L470 AbstractCegarLoop]: Abstraction has 1995 states and 3112 transitions. [2021-11-20 22:55:55,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:55:55,187 INFO L276 IsEmpty]: Start isEmpty. Operand 1995 states and 3112 transitions. [2021-11-20 22:55:55,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-11-20 22:55:55,189 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:55:55,189 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:55:55,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2021-11-20 22:55:55,189 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:55:55,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:55:55,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1878119843, now seen corresponding path program 1 times [2021-11-20 22:55:55,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:55:55,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432755542] [2021-11-20 22:55:55,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:55:55,190 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:55:55,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:55:55,251 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 200 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-20 22:55:55,251 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:55:55,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432755542] [2021-11-20 22:55:55,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432755542] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:55:55,252 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:55:55,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 22:55:55,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573056382] [2021-11-20 22:55:55,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:55:55,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:55:55,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:55:55,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:55:55,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:55:55,253 INFO L87 Difference]: Start difference. First operand 1995 states and 3112 transitions. Second operand has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:55:56,406 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:55:58,428 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:56:00,450 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:56:00,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:56:00,857 INFO L93 Difference]: Finished difference Result 4038 states and 6280 transitions. [2021-11-20 22:56:00,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:56:00,858 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 157 [2021-11-20 22:56:00,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:56:00,860 INFO L225 Difference]: With dead ends: 4038 [2021-11-20 22:56:00,861 INFO L226 Difference]: Without dead ends: 2055 [2021-11-20 22:56:00,863 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:56:00,863 INFO L933 BasicCegarLoop]: 165 mSDtfsCounter, 33 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2021-11-20 22:56:00,864 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 401 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 196 Invalid, 2 Unknown, 0 Unchecked, 5.5s Time] [2021-11-20 22:56:00,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2055 states. [2021-11-20 22:56:00,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2055 to 1995. [2021-11-20 22:56:01,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1995 states, 1994 states have (on average 1.5586760280842527) internal successors, (3108), 1994 states have internal predecessors, (3108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:56:01,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1995 states to 1995 states and 3108 transitions. [2021-11-20 22:56:01,003 INFO L78 Accepts]: Start accepts. Automaton has 1995 states and 3108 transitions. Word has length 157 [2021-11-20 22:56:01,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:56:01,003 INFO L470 AbstractCegarLoop]: Abstraction has 1995 states and 3108 transitions. [2021-11-20 22:56:01,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:56:01,003 INFO L276 IsEmpty]: Start isEmpty. Operand 1995 states and 3108 transitions. [2021-11-20 22:56:01,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-11-20 22:56:01,005 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:56:01,005 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:56:01,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2021-11-20 22:56:01,005 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:56:01,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:56:01,006 INFO L85 PathProgramCache]: Analyzing trace with hash 13776084, now seen corresponding path program 1 times [2021-11-20 22:56:01,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:56:01,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758008650] [2021-11-20 22:56:01,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:56:01,006 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:56:01,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:56:01,067 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 171 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-20 22:56:01,067 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:56:01,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758008650] [2021-11-20 22:56:01,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758008650] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:56:01,067 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:56:01,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 22:56:01,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822050539] [2021-11-20 22:56:01,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:56:01,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:56:01,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:56:01,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:56:01,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:56:01,068 INFO L87 Difference]: Start difference. First operand 1995 states and 3108 transitions. Second operand has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:56:03,076 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:56:03,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:56:03,552 INFO L93 Difference]: Finished difference Result 3634 states and 5627 transitions. [2021-11-20 22:56:03,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:56:03,553 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 0 states have call successors, (0), 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 159 [2021-11-20 22:56:03,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:56:03,555 INFO L225 Difference]: With dead ends: 3634 [2021-11-20 22:56:03,555 INFO L226 Difference]: Without dead ends: 2111 [2021-11-20 22:56:03,556 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:56:03,556 INFO L933 BasicCegarLoop]: 168 mSDtfsCounter, 86 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 22:56:03,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 406 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 250 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-20 22:56:03,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2111 states. [2021-11-20 22:56:03,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2111 to 1995. [2021-11-20 22:56:03,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1995 states, 1994 states have (on average 1.557171514543631) internal successors, (3105), 1994 states have internal predecessors, (3105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:56:03,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1995 states to 1995 states and 3105 transitions. [2021-11-20 22:56:03,633 INFO L78 Accepts]: Start accepts. Automaton has 1995 states and 3105 transitions. Word has length 159 [2021-11-20 22:56:03,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:56:03,633 INFO L470 AbstractCegarLoop]: Abstraction has 1995 states and 3105 transitions. [2021-11-20 22:56:03,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:56:03,633 INFO L276 IsEmpty]: Start isEmpty. Operand 1995 states and 3105 transitions. [2021-11-20 22:56:03,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-11-20 22:56:03,635 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:56:03,635 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:56:03,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2021-11-20 22:56:03,635 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:56:03,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:56:03,635 INFO L85 PathProgramCache]: Analyzing trace with hash -544556582, now seen corresponding path program 1 times [2021-11-20 22:56:03,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:56:03,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991619194] [2021-11-20 22:56:03,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:56:03,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:56:03,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:56:03,691 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 177 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-20 22:56:03,692 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:56:03,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991619194] [2021-11-20 22:56:03,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991619194] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:56:03,692 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:56:03,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 22:56:03,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130222868] [2021-11-20 22:56:03,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:56:03,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:56:03,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:56:03,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:56:03,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:56:03,694 INFO L87 Difference]: Start difference. First operand 1995 states and 3105 transitions. Second operand has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:56:05,705 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:56:06,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:56:06,193 INFO L93 Difference]: Finished difference Result 3634 states and 5621 transitions. [2021-11-20 22:56:06,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:56:06,194 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-11-20 22:56:06,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:56:06,195 INFO L225 Difference]: With dead ends: 3634 [2021-11-20 22:56:06,196 INFO L226 Difference]: Without dead ends: 2111 [2021-11-20 22:56:06,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:56:06,197 INFO L933 BasicCegarLoop]: 168 mSDtfsCounter, 84 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 22:56:06,197 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 406 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 250 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-20 22:56:06,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2111 states. [2021-11-20 22:56:06,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2111 to 1995. [2021-11-20 22:56:06,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1995 states, 1994 states have (on average 1.555667001003009) internal successors, (3102), 1994 states have internal predecessors, (3102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:56:06,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1995 states to 1995 states and 3102 transitions. [2021-11-20 22:56:06,291 INFO L78 Accepts]: Start accepts. Automaton has 1995 states and 3102 transitions. Word has length 160 [2021-11-20 22:56:06,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:56:06,291 INFO L470 AbstractCegarLoop]: Abstraction has 1995 states and 3102 transitions. [2021-11-20 22:56:06,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:56:06,291 INFO L276 IsEmpty]: Start isEmpty. Operand 1995 states and 3102 transitions. [2021-11-20 22:56:06,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-11-20 22:56:06,293 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:56:06,294 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:56:06,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2021-11-20 22:56:06,294 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:56:06,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:56:06,294 INFO L85 PathProgramCache]: Analyzing trace with hash -508747024, now seen corresponding path program 1 times [2021-11-20 22:56:06,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:56:06,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780457115] [2021-11-20 22:56:06,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:56:06,295 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:56:06,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:56:06,360 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 209 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-20 22:56:06,360 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:56:06,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780457115] [2021-11-20 22:56:06,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780457115] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:56:06,361 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:56:06,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 22:56:06,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379990291] [2021-11-20 22:56:06,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:56:06,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:56:06,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:56:06,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:56:06,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:56:06,363 INFO L87 Difference]: Start difference. First operand 1995 states and 3102 transitions. Second operand has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:56:08,374 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:56:08,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:56:08,853 INFO L93 Difference]: Finished difference Result 3634 states and 5615 transitions. [2021-11-20 22:56:08,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:56:08,854 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 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 161 [2021-11-20 22:56:08,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:56:08,856 INFO L225 Difference]: With dead ends: 3634 [2021-11-20 22:56:08,856 INFO L226 Difference]: Without dead ends: 2111 [2021-11-20 22:56:08,857 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:56:08,857 INFO L933 BasicCegarLoop]: 168 mSDtfsCounter, 66 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 22:56:08,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 406 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 250 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-20 22:56:08,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2111 states. [2021-11-20 22:56:08,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2111 to 1995. [2021-11-20 22:56:08,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1995 states, 1994 states have (on average 1.5541624874623872) internal successors, (3099), 1994 states have internal predecessors, (3099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:56:08,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1995 states to 1995 states and 3099 transitions. [2021-11-20 22:56:08,938 INFO L78 Accepts]: Start accepts. Automaton has 1995 states and 3099 transitions. Word has length 161 [2021-11-20 22:56:08,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:56:08,938 INFO L470 AbstractCegarLoop]: Abstraction has 1995 states and 3099 transitions. [2021-11-20 22:56:08,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:56:08,938 INFO L276 IsEmpty]: Start isEmpty. Operand 1995 states and 3099 transitions. [2021-11-20 22:56:08,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-11-20 22:56:08,940 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:56:08,940 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:56:08,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2021-11-20 22:56:08,941 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:56:08,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:56:08,941 INFO L85 PathProgramCache]: Analyzing trace with hash 491656793, now seen corresponding path program 1 times [2021-11-20 22:56:08,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:56:08,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299711693] [2021-11-20 22:56:08,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:56:08,941 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:56:08,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:56:09,030 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 183 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-20 22:56:09,030 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:56:09,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299711693] [2021-11-20 22:56:09,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299711693] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:56:09,030 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:56:09,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 22:56:09,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604872237] [2021-11-20 22:56:09,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:56:09,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:56:09,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:56:09,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:56:09,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:56:09,032 INFO L87 Difference]: Start difference. First operand 1995 states and 3099 transitions. Second operand has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:56:11,043 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:56:11,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:56:11,531 INFO L93 Difference]: Finished difference Result 3634 states and 5609 transitions. [2021-11-20 22:56:11,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:56:11,532 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 161 [2021-11-20 22:56:11,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:56:11,533 INFO L225 Difference]: With dead ends: 3634 [2021-11-20 22:56:11,533 INFO L226 Difference]: Without dead ends: 2111 [2021-11-20 22:56:11,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:56:11,535 INFO L933 BasicCegarLoop]: 168 mSDtfsCounter, 81 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 22:56:11,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 406 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 250 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-20 22:56:11,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2111 states. [2021-11-20 22:56:11,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2111 to 1995. [2021-11-20 22:56:11,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1995 states, 1994 states have (on average 1.5526579739217652) internal successors, (3096), 1994 states have internal predecessors, (3096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:56:11,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1995 states to 1995 states and 3096 transitions. [2021-11-20 22:56:11,626 INFO L78 Accepts]: Start accepts. Automaton has 1995 states and 3096 transitions. Word has length 161 [2021-11-20 22:56:11,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:56:11,626 INFO L470 AbstractCegarLoop]: Abstraction has 1995 states and 3096 transitions. [2021-11-20 22:56:11,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:56:11,627 INFO L276 IsEmpty]: Start isEmpty. Operand 1995 states and 3096 transitions. [2021-11-20 22:56:11,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-11-20 22:56:11,628 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:56:11,628 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:56:11,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2021-11-20 22:56:11,629 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:56:11,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:56:11,629 INFO L85 PathProgramCache]: Analyzing trace with hash -580810113, now seen corresponding path program 1 times [2021-11-20 22:56:11,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:56:11,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121235491] [2021-11-20 22:56:11,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:56:11,630 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:56:11,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:56:11,689 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 189 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-20 22:56:11,689 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:56:11,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121235491] [2021-11-20 22:56:11,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121235491] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:56:11,689 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:56:11,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 22:56:11,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054195593] [2021-11-20 22:56:11,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:56:11,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:56:11,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:56:11,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:56:11,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:56:11,691 INFO L87 Difference]: Start difference. First operand 1995 states and 3096 transitions. Second operand has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:56:13,702 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:56:14,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:56:14,156 INFO L93 Difference]: Finished difference Result 3610 states and 5576 transitions. [2021-11-20 22:56:14,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:56:14,157 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 162 [2021-11-20 22:56:14,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:56:14,159 INFO L225 Difference]: With dead ends: 3610 [2021-11-20 22:56:14,159 INFO L226 Difference]: Without dead ends: 2087 [2021-11-20 22:56:14,160 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:56:14,160 INFO L933 BasicCegarLoop]: 172 mSDtfsCounter, 75 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 22:56:14,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 414 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 242 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 22:56:14,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2087 states. [2021-11-20 22:56:14,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2087 to 1995. [2021-11-20 22:56:14,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1995 states, 1994 states have (on average 1.5511534603811434) internal successors, (3093), 1994 states have internal predecessors, (3093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:56:14,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1995 states to 1995 states and 3093 transitions. [2021-11-20 22:56:14,253 INFO L78 Accepts]: Start accepts. Automaton has 1995 states and 3093 transitions. Word has length 162 [2021-11-20 22:56:14,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:56:14,254 INFO L470 AbstractCegarLoop]: Abstraction has 1995 states and 3093 transitions. [2021-11-20 22:56:14,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:56:14,254 INFO L276 IsEmpty]: Start isEmpty. Operand 1995 states and 3093 transitions. [2021-11-20 22:56:14,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-11-20 22:56:14,256 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:56:14,256 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:56:14,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2021-11-20 22:56:14,257 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:56:14,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:56:14,257 INFO L85 PathProgramCache]: Analyzing trace with hash -1011549162, now seen corresponding path program 1 times [2021-11-20 22:56:14,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:56:14,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308389929] [2021-11-20 22:56:14,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:56:14,257 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:56:14,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:56:14,306 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 212 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-20 22:56:14,306 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:56:14,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308389929] [2021-11-20 22:56:14,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308389929] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:56:14,306 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:56:14,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 22:56:14,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575771638] [2021-11-20 22:56:14,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:56:14,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:56:14,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:56:14,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:56:14,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:56:14,307 INFO L87 Difference]: Start difference. First operand 1995 states and 3093 transitions. Second operand has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:56:16,315 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:56:16,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:56:16,781 INFO L93 Difference]: Finished difference Result 3604 states and 5564 transitions. [2021-11-20 22:56:16,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:56:16,782 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 0 states have call successors, (0), 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 162 [2021-11-20 22:56:16,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:56:16,783 INFO L225 Difference]: With dead ends: 3604 [2021-11-20 22:56:16,783 INFO L226 Difference]: Without dead ends: 2081 [2021-11-20 22:56:16,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:56:16,784 INFO L933 BasicCegarLoop]: 173 mSDtfsCounter, 57 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 22:56:16,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 416 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 240 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 22:56:16,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2081 states. [2021-11-20 22:56:16,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2081 to 1995. [2021-11-20 22:56:16,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1995 states, 1994 states have (on average 1.5496489468405215) internal successors, (3090), 1994 states have internal predecessors, (3090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:56:16,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1995 states to 1995 states and 3090 transitions. [2021-11-20 22:56:16,870 INFO L78 Accepts]: Start accepts. Automaton has 1995 states and 3090 transitions. Word has length 162 [2021-11-20 22:56:16,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:56:16,870 INFO L470 AbstractCegarLoop]: Abstraction has 1995 states and 3090 transitions. [2021-11-20 22:56:16,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:56:16,870 INFO L276 IsEmpty]: Start isEmpty. Operand 1995 states and 3090 transitions. [2021-11-20 22:56:16,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-11-20 22:56:16,871 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:56:16,871 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:56:16,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2021-11-20 22:56:16,872 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:56:16,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:56:16,872 INFO L85 PathProgramCache]: Analyzing trace with hash 243878269, now seen corresponding path program 1 times [2021-11-20 22:56:16,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:56:16,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982749233] [2021-11-20 22:56:16,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:56:16,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:56:16,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:56:16,919 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 212 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-11-20 22:56:16,919 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:56:16,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982749233] [2021-11-20 22:56:16,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982749233] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:56:16,919 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:56:16,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 22:56:16,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740538452] [2021-11-20 22:56:16,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:56:16,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:56:16,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:56:16,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:56:16,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:56:16,920 INFO L87 Difference]: Start difference. First operand 1995 states and 3090 transitions. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:56:18,928 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:56:19,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:56:19,343 INFO L93 Difference]: Finished difference Result 4033 states and 6231 transitions. [2021-11-20 22:56:19,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:56:19,344 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 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 162 [2021-11-20 22:56:19,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:56:19,346 INFO L225 Difference]: With dead ends: 4033 [2021-11-20 22:56:19,346 INFO L226 Difference]: Without dead ends: 2050 [2021-11-20 22:56:19,347 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:56:19,347 INFO L933 BasicCegarLoop]: 164 mSDtfsCounter, 42 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 22:56:19,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 399 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 207 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 22:56:19,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2050 states. [2021-11-20 22:56:19,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2050 to 1995. [2021-11-20 22:56:19,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1995 states, 1994 states have (on average 1.5476429287863591) internal successors, (3086), 1994 states have internal predecessors, (3086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:56:19,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1995 states to 1995 states and 3086 transitions. [2021-11-20 22:56:19,440 INFO L78 Accepts]: Start accepts. Automaton has 1995 states and 3086 transitions. Word has length 162 [2021-11-20 22:56:19,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:56:19,440 INFO L470 AbstractCegarLoop]: Abstraction has 1995 states and 3086 transitions. [2021-11-20 22:56:19,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:56:19,440 INFO L276 IsEmpty]: Start isEmpty. Operand 1995 states and 3086 transitions. [2021-11-20 22:56:19,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-11-20 22:56:19,441 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:56:19,441 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2021-11-20 22:56:19,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2021-11-20 22:56:19,441 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:56:19,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:56:19,442 INFO L85 PathProgramCache]: Analyzing trace with hash 247800765, now seen corresponding path program 1 times [2021-11-20 22:56:19,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:56:19,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574307534] [2021-11-20 22:56:19,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:56:19,442 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:56:19,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:56:19,523 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 185 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-11-20 22:56:19,523 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:56:19,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574307534] [2021-11-20 22:56:19,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574307534] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:56:19,524 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:56:19,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 22:56:19,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383209502] [2021-11-20 22:56:19,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:56:19,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 22:56:19,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:56:19,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 22:56:19,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 22:56:19,525 INFO L87 Difference]: Start difference. First operand 1995 states and 3086 transitions. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:56:21,533 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:56:22,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:56:22,135 INFO L93 Difference]: Finished difference Result 4045 states and 6239 transitions. [2021-11-20 22:56:22,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 22:56:22,136 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 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 163 [2021-11-20 22:56:22,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:56:22,137 INFO L225 Difference]: With dead ends: 4045 [2021-11-20 22:56:22,138 INFO L226 Difference]: Without dead ends: 2062 [2021-11-20 22:56:22,138 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-20 22:56:22,139 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 49 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-20 22:56:22,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 503 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 410 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2021-11-20 22:56:22,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2062 states. [2021-11-20 22:56:22,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2062 to 1995. [2021-11-20 22:56:22,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1995 states, 1994 states have (on average 1.5456369107321966) internal successors, (3082), 1994 states have internal predecessors, (3082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:56:22,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1995 states to 1995 states and 3082 transitions. [2021-11-20 22:56:22,233 INFO L78 Accepts]: Start accepts. Automaton has 1995 states and 3082 transitions. Word has length 163 [2021-11-20 22:56:22,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:56:22,233 INFO L470 AbstractCegarLoop]: Abstraction has 1995 states and 3082 transitions. [2021-11-20 22:56:22,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:56:22,234 INFO L276 IsEmpty]: Start isEmpty. Operand 1995 states and 3082 transitions. [2021-11-20 22:56:22,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-11-20 22:56:22,235 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:56:22,235 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:56:22,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2021-11-20 22:56:22,235 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:56:22,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:56:22,236 INFO L85 PathProgramCache]: Analyzing trace with hash 948941095, now seen corresponding path program 1 times [2021-11-20 22:56:22,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:56:22,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402913093] [2021-11-20 22:56:22,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:56:22,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:56:22,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:56:22,299 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 215 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-11-20 22:56:22,299 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:56:22,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402913093] [2021-11-20 22:56:22,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402913093] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:56:22,300 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:56:22,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 22:56:22,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926161269] [2021-11-20 22:56:22,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:56:22,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:56:22,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:56:22,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:56:22,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:56:22,302 INFO L87 Difference]: Start difference. First operand 1995 states and 3082 transitions. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:56:24,313 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:56:24,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:56:24,719 INFO L93 Difference]: Finished difference Result 4029 states and 6211 transitions. [2021-11-20 22:56:24,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:56:24,720 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 163 [2021-11-20 22:56:24,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:56:24,722 INFO L225 Difference]: With dead ends: 4029 [2021-11-20 22:56:24,722 INFO L226 Difference]: Without dead ends: 2046 [2021-11-20 22:56:24,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:56:24,723 INFO L933 BasicCegarLoop]: 163 mSDtfsCounter, 40 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 22:56:24,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 397 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 207 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 22:56:24,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2046 states. [2021-11-20 22:56:24,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2046 to 1995. [2021-11-20 22:56:24,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1995 states, 1994 states have (on average 1.543630892678034) internal successors, (3078), 1994 states have internal predecessors, (3078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:56:24,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1995 states to 1995 states and 3078 transitions. [2021-11-20 22:56:24,803 INFO L78 Accepts]: Start accepts. Automaton has 1995 states and 3078 transitions. Word has length 163 [2021-11-20 22:56:24,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:56:24,803 INFO L470 AbstractCegarLoop]: Abstraction has 1995 states and 3078 transitions. [2021-11-20 22:56:24,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:56:24,804 INFO L276 IsEmpty]: Start isEmpty. Operand 1995 states and 3078 transitions. [2021-11-20 22:56:24,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-11-20 22:56:24,805 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:56:24,805 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2021-11-20 22:56:24,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2021-11-20 22:56:24,805 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:56:24,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:56:24,805 INFO L85 PathProgramCache]: Analyzing trace with hash -737375764, now seen corresponding path program 1 times [2021-11-20 22:56:24,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:56:24,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154231614] [2021-11-20 22:56:24,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:56:24,806 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:56:24,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:56:24,895 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 188 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-11-20 22:56:24,895 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:56:24,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154231614] [2021-11-20 22:56:24,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154231614] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:56:24,896 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:56:24,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 22:56:24,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801567820] [2021-11-20 22:56:24,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:56:24,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 22:56:24,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:56:24,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 22:56:24,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 22:56:24,897 INFO L87 Difference]: Start difference. First operand 1995 states and 3078 transitions. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:56:26,905 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:56:27,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:56:27,414 INFO L93 Difference]: Finished difference Result 4029 states and 6203 transitions. [2021-11-20 22:56:27,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 22:56:27,415 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 164 [2021-11-20 22:56:27,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:56:27,417 INFO L225 Difference]: With dead ends: 4029 [2021-11-20 22:56:27,417 INFO L226 Difference]: Without dead ends: 2046 [2021-11-20 22:56:27,418 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-20 22:56:27,418 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 59 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 22:56:27,418 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 423 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 304 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-20 22:56:27,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2046 states. [2021-11-20 22:56:27,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2046 to 1986. [2021-11-20 22:56:27,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1986 states, 1985 states have (on average 1.544080604534005) internal successors, (3065), 1985 states have internal predecessors, (3065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:56:27,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1986 states to 1986 states and 3065 transitions. [2021-11-20 22:56:27,512 INFO L78 Accepts]: Start accepts. Automaton has 1986 states and 3065 transitions. Word has length 164 [2021-11-20 22:56:27,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:56:27,512 INFO L470 AbstractCegarLoop]: Abstraction has 1986 states and 3065 transitions. [2021-11-20 22:56:27,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:56:27,512 INFO L276 IsEmpty]: Start isEmpty. Operand 1986 states and 3065 transitions. [2021-11-20 22:56:27,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-11-20 22:56:27,513 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:56:27,513 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:56:27,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2021-11-20 22:56:27,513 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:56:27,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:56:27,514 INFO L85 PathProgramCache]: Analyzing trace with hash -320259523, now seen corresponding path program 1 times [2021-11-20 22:56:27,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:56:27,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99389232] [2021-11-20 22:56:27,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:56:27,514 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:56:27,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:56:27,565 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 203 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-20 22:56:27,565 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:56:27,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99389232] [2021-11-20 22:56:27,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99389232] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:56:27,565 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:56:27,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 22:56:27,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809082817] [2021-11-20 22:56:27,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:56:27,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:56:27,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:56:27,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:56:27,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:56:27,567 INFO L87 Difference]: Start difference. First operand 1986 states and 3065 transitions. Second operand has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:56:29,578 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:56:30,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:56:30,028 INFO L93 Difference]: Finished difference Result 3595 states and 5521 transitions. [2021-11-20 22:56:30,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:56:30,029 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 0 states have call successors, (0), 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 164 [2021-11-20 22:56:30,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:56:30,031 INFO L225 Difference]: With dead ends: 3595 [2021-11-20 22:56:30,031 INFO L226 Difference]: Without dead ends: 2072 [2021-11-20 22:56:30,032 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:56:30,032 INFO L933 BasicCegarLoop]: 155 mSDtfsCounter, 59 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 22:56:30,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 380 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 235 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 22:56:30,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2072 states. [2021-11-20 22:56:30,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2072 to 1986. [2021-11-20 22:56:30,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1986 states, 1985 states have (on average 1.5425692695214106) internal successors, (3062), 1985 states have internal predecessors, (3062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:56:30,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1986 states to 1986 states and 3062 transitions. [2021-11-20 22:56:30,157 INFO L78 Accepts]: Start accepts. Automaton has 1986 states and 3062 transitions. Word has length 164 [2021-11-20 22:56:30,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:56:30,158 INFO L470 AbstractCegarLoop]: Abstraction has 1986 states and 3062 transitions. [2021-11-20 22:56:30,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:56:30,158 INFO L276 IsEmpty]: Start isEmpty. Operand 1986 states and 3062 transitions. [2021-11-20 22:56:30,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-11-20 22:56:30,159 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:56:30,177 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:56:30,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2021-11-20 22:56:30,177 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:56:30,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:56:30,178 INFO L85 PathProgramCache]: Analyzing trace with hash -805592073, now seen corresponding path program 1 times [2021-11-20 22:56:30,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:56:30,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105427782] [2021-11-20 22:56:30,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:56:30,178 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:56:30,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:56:30,225 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 206 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-20 22:56:30,226 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:56:30,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105427782] [2021-11-20 22:56:30,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105427782] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:56:30,226 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:56:30,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 22:56:30,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910498230] [2021-11-20 22:56:30,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:56:30,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:56:30,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:56:30,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:56:30,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:56:30,227 INFO L87 Difference]: Start difference. First operand 1986 states and 3062 transitions. Second operand has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:56:32,234 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:56:32,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:56:32,653 INFO L93 Difference]: Finished difference Result 3571 states and 5476 transitions. [2021-11-20 22:56:32,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:56:32,654 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-11-20 22:56:32,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:56:32,668 INFO L225 Difference]: With dead ends: 3571 [2021-11-20 22:56:32,669 INFO L226 Difference]: Without dead ends: 2048 [2021-11-20 22:56:32,669 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:56:32,669 INFO L933 BasicCegarLoop]: 164 mSDtfsCounter, 48 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 22:56:32,670 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 398 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 217 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 22:56:32,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2048 states. [2021-11-20 22:56:32,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2048 to 1986. [2021-11-20 22:56:32,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1986 states, 1985 states have (on average 1.5410579345088162) internal successors, (3059), 1985 states have internal predecessors, (3059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:56:32,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1986 states to 1986 states and 3059 transitions. [2021-11-20 22:56:32,751 INFO L78 Accepts]: Start accepts. Automaton has 1986 states and 3059 transitions. Word has length 165 [2021-11-20 22:56:32,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:56:32,751 INFO L470 AbstractCegarLoop]: Abstraction has 1986 states and 3059 transitions. [2021-11-20 22:56:32,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:56:32,751 INFO L276 IsEmpty]: Start isEmpty. Operand 1986 states and 3059 transitions. [2021-11-20 22:56:32,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-11-20 22:56:32,753 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:56:32,753 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:56:32,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2021-11-20 22:56:32,753 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:56:32,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:56:32,753 INFO L85 PathProgramCache]: Analyzing trace with hash 1745345621, now seen corresponding path program 1 times [2021-11-20 22:56:32,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:56:32,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763721188] [2021-11-20 22:56:32,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:56:32,753 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:56:33,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:56:33,908 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 36 proven. 224 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-20 22:56:33,908 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:56:33,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763721188] [2021-11-20 22:56:33,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763721188] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 22:56:33,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969538281] [2021-11-20 22:56:33,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:56:33,909 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:56:33,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:56:33,911 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:56:33,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 22:56:34,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:56:34,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 684 conjuncts, 62 conjunts are in the unsatisfiable core [2021-11-20 22:56:34,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:56:34,680 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Some non-self update cases but no top-level DER relation [2021-11-20 22:56:34,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1770031792] [2021-11-20 22:56:34,707 INFO L159 IcfgInterpreter]: Started Sifa with 60 locations of interest [2021-11-20 22:56:34,707 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 22:56:34,712 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 22:56:34,717 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 22:56:34,717 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 22:56:35,055 FATAL L? ?]: Ignoring exception! de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: Function ULTIMATE.start_ssl3_accept_~s#1.offset is already defined. at de.uni_freiburg.informatik.ultimate.logic.NoopScript.declareFun(NoopScript.java:263) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.declareFun(Scriptor.java:115) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.declareFun(WrapperScript.java:137) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.declareFun(WrapperScript.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.declareFun(HistoryRecordingScript.java:95) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.declareFun(WrapperScript.java:137) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.termVariable2constant(SmtUtils.java:872) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.termVariables2Constants(SmtUtils.java:861) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.simplify.SimplifyDDAWithTimeout.getSimplifiedTerm(SimplifyDDAWithTimeout.java:161) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:192) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplifyWithStatistics(SmtUtils.java:259) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify(QuantifierPusher.java:1066) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:105) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:243) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:233) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminate(PartialQuantifierElimination.java:92) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.newQuantifier(SymbolicTools.java:278) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.projectExistentially(SymbolicTools.java:264) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateTransformer.strongestPostcondition(PredicateTransformer.java:131) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:116) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-20 22:56:35,062 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 22:56:35,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-11-20 22:56:35,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208799131] [2021-11-20 22:56:35,064 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 22:56:35,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 22:56:35,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:56:35,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 22:56:35,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-20 22:56:35,065 INFO L87 Difference]: Start difference. First operand 1986 states and 3059 transitions. Second operand has 9 states, 9 states have (on average 14.222222222222221) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:56:35,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 22:56:35,065 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-20 22:56:35,066 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 22:56:35,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 22:56:35,106 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 22:56:35,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:56:35,284 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@6e7b1621 at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:359) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:206) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:131) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker$ProtectedHtc.checkInternal(ChainingHoareTripleChecker.java:436) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker.checkInternal(ChainingHoareTripleChecker.java:98) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:95) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:357) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.chooseFalseSuccessor2(BasicAbstractInterpolantAutomaton.java:107) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:73) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:868) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:784) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-20 22:56:35,287 INFO L158 Benchmark]: Toolchain (without parser) took 295890.50ms. Allocated memory was 86.0MB in the beginning and 234.9MB in the end (delta: 148.9MB). Free memory was 46.4MB in the beginning and 156.4MB in the end (delta: -109.9MB). Peak memory consumption was 39.2MB. Max. memory is 16.1GB. [2021-11-20 22:56:35,287 INFO L158 Benchmark]: CDTParser took 0.24ms. Allocated memory is still 86.0MB. Free memory is still 65.4MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 22:56:35,287 INFO L158 Benchmark]: CACSL2BoogieTranslator took 762.92ms. Allocated memory was 86.0MB in the beginning and 119.5MB in the end (delta: 33.6MB). Free memory was 46.2MB in the beginning and 73.5MB in the end (delta: -27.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-20 22:56:35,287 INFO L158 Benchmark]: Boogie Procedure Inliner took 144.17ms. Allocated memory is still 119.5MB. Free memory was 73.5MB in the beginning and 68.7MB in the end (delta: 4.8MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-11-20 22:56:35,287 INFO L158 Benchmark]: Boogie Preprocessor took 98.37ms. Allocated memory is still 119.5MB. Free memory was 68.2MB in the beginning and 61.4MB in the end (delta: 6.8MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-11-20 22:56:35,287 INFO L158 Benchmark]: RCFGBuilder took 3899.05ms. Allocated memory was 119.5MB in the beginning and 161.5MB in the end (delta: 41.9MB). Free memory was 61.4MB in the beginning and 122.7MB in the end (delta: -61.2MB). Peak memory consumption was 31.5MB. Max. memory is 16.1GB. [2021-11-20 22:56:35,287 INFO L158 Benchmark]: TraceAbstraction took 290976.26ms. Allocated memory was 161.5MB in the beginning and 234.9MB in the end (delta: 73.4MB). Free memory was 121.6MB in the beginning and 156.4MB in the end (delta: -34.7MB). Peak memory consumption was 38.0MB. Max. memory is 16.1GB. [2021-11-20 22:56:35,288 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24ms. Allocated memory is still 86.0MB. Free memory is still 65.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 762.92ms. Allocated memory was 86.0MB in the beginning and 119.5MB in the end (delta: 33.6MB). Free memory was 46.2MB in the beginning and 73.5MB in the end (delta: -27.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 144.17ms. Allocated memory is still 119.5MB. Free memory was 73.5MB in the beginning and 68.7MB in the end (delta: 4.8MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Preprocessor took 98.37ms. Allocated memory is still 119.5MB. Free memory was 68.2MB in the beginning and 61.4MB in the end (delta: 6.8MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * RCFGBuilder took 3899.05ms. Allocated memory was 119.5MB in the beginning and 161.5MB in the end (delta: 41.9MB). Free memory was 61.4MB in the beginning and 122.7MB in the end (delta: -61.2MB). Peak memory consumption was 31.5MB. Max. memory is 16.1GB. * TraceAbstraction took 290976.26ms. Allocated memory was 161.5MB in the beginning and 234.9MB in the end (delta: 73.4MB). Free memory was 121.6MB in the beginning and 156.4MB in the end (delta: -34.7MB). Peak memory consumption was 38.0MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@6e7b1621 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@6e7b1621: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-20 22:56:35,339 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.10.i.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 06e766f2b0fb57f78717a4ab927a7f5c398a4eef6e5769d710eaeddfb253f7dd --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 22:56:37,693 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 22:56:37,696 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 22:56:37,751 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 22:56:37,752 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 22:56:37,755 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 22:56:37,757 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 22:56:37,762 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 22:56:37,765 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 22:56:37,772 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 22:56:37,774 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 22:56:37,775 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 22:56:37,776 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 22:56:37,778 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 22:56:37,780 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 22:56:37,784 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 22:56:37,786 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 22:56:37,787 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 22:56:37,788 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 22:56:37,796 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 22:56:37,797 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 22:56:37,799 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 22:56:37,801 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 22:56:37,803 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 22:56:37,812 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 22:56:37,812 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 22:56:37,812 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 22:56:37,814 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 22:56:37,815 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 22:56:37,816 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 22:56:37,816 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 22:56:37,818 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 22:56:37,819 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 22:56:37,820 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 22:56:37,822 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 22:56:37,822 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 22:56:37,823 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 22:56:37,823 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 22:56:37,823 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 22:56:37,825 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 22:56:37,826 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 22:56:37,831 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-20 22:56:37,871 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 22:56:37,872 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 22:56:37,872 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 22:56:37,873 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 22:56:37,873 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 22:56:37,874 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 22:56:37,874 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-20 22:56:37,874 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-20 22:56:37,875 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-20 22:56:37,875 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-20 22:56:37,876 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-20 22:56:37,876 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-20 22:56:37,878 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 22:56:37,878 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 22:56:37,878 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 22:56:37,878 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 22:56:37,879 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 22:56:37,879 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 22:56:37,879 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 22:56:37,879 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-20 22:56:37,879 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-20 22:56:37,880 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 22:56:37,880 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 22:56:37,880 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 22:56:37,880 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 22:56:37,881 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 22:56:37,881 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 22:56:37,881 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 22:56:37,881 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 22:56:37,882 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 22:56:37,882 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 22:56:37,882 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 22:56:37,883 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-20 22:56:37,883 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-20 22:56:37,883 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 22:56:37,883 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 22:56:37,883 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 22:56:37,884 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 06e766f2b0fb57f78717a4ab927a7f5c398a4eef6e5769d710eaeddfb253f7dd [2021-11-20 22:56:38,269 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 22:56:38,293 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 22:56:38,296 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 22:56:38,297 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 22:56:38,298 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 22:56:38,299 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/openssl/s3_srvr.blast.10.i.cil-2.c [2021-11-20 22:56:38,386 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/data/61f55b15d/fd0893fc145b4da990744b1d09d31293/FLAGb840b9f0f [2021-11-20 22:56:39,137 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 22:56:39,138 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/sv-benchmarks/c/openssl/s3_srvr.blast.10.i.cil-2.c [2021-11-20 22:56:39,168 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/data/61f55b15d/fd0893fc145b4da990744b1d09d31293/FLAGb840b9f0f [2021-11-20 22:56:39,305 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/data/61f55b15d/fd0893fc145b4da990744b1d09d31293 [2021-11-20 22:56:39,308 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 22:56:39,309 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 22:56:39,313 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 22:56:39,313 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 22:56:39,317 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 22:56:39,318 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:56:39" (1/1) ... [2021-11-20 22:56:39,319 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@635ec12b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:56:39, skipping insertion in model container [2021-11-20 22:56:39,319 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:56:39" (1/1) ... [2021-11-20 22:56:39,327 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 22:56:39,391 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 22:56:39,835 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_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/sv-benchmarks/c/openssl/s3_srvr.blast.10.i.cil-2.c[73311,73324] [2021-11-20 22:56:39,860 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 22:56:39,887 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 22:56:40,108 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_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/sv-benchmarks/c/openssl/s3_srvr.blast.10.i.cil-2.c[73311,73324] [2021-11-20 22:56:40,118 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 22:56:40,142 INFO L208 MainTranslator]: Completed translation [2021-11-20 22:56:40,143 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:56:40 WrapperNode [2021-11-20 22:56:40,143 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 22:56:40,144 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 22:56:40,144 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 22:56:40,144 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 22:56:40,151 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:56:40" (1/1) ... [2021-11-20 22:56:40,199 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:56:40" (1/1) ... [2021-11-20 22:56:40,277 INFO L137 Inliner]: procedures = 35, calls = 223, calls flagged for inlining = 7, calls inlined = 3, statements flattened = 757 [2021-11-20 22:56:40,279 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 22:56:40,280 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 22:56:40,281 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 22:56:40,281 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 22:56:40,290 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:56:40" (1/1) ... [2021-11-20 22:56:40,290 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:56:40" (1/1) ... [2021-11-20 22:56:40,308 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:56:40" (1/1) ... [2021-11-20 22:56:40,308 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:56:40" (1/1) ... [2021-11-20 22:56:40,354 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:56:40" (1/1) ... [2021-11-20 22:56:40,362 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:56:40" (1/1) ... [2021-11-20 22:56:40,365 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:56:40" (1/1) ... [2021-11-20 22:56:40,371 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 22:56:40,372 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 22:56:40,372 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 22:56:40,373 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 22:56:40,373 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:56:40" (1/1) ... [2021-11-20 22:56:40,380 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 22:56:40,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:56:40,403 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 22:56:40,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 22:56:40,452 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 22:56:40,453 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-20 22:56:40,453 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-20 22:56:40,454 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-20 22:56:40,455 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-20 22:56:40,455 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 22:56:40,455 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 22:56:40,455 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 22:56:40,455 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-20 22:56:40,659 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 22:56:40,665 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 22:56:40,689 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-20 22:56:44,809 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2021-11-20 22:56:44,810 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2021-11-20 22:56:44,810 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 22:56:44,819 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 22:56:44,819 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-20 22:56:44,822 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:56:44 BoogieIcfgContainer [2021-11-20 22:56:44,822 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 22:56:44,824 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 22:56:44,824 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 22:56:44,827 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 22:56:44,827 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 10:56:39" (1/3) ... [2021-11-20 22:56:44,828 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10440a87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:56:44, skipping insertion in model container [2021-11-20 22:56:44,828 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:56:40" (2/3) ... [2021-11-20 22:56:44,829 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10440a87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:56:44, skipping insertion in model container [2021-11-20 22:56:44,829 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:56:44" (3/3) ... [2021-11-20 22:56:44,830 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.10.i.cil-2.c [2021-11-20 22:56:44,835 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 22:56:44,836 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 22:56:44,884 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 22:56:44,891 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 22:56:44,891 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 22:56:44,909 INFO L276 IsEmpty]: Start isEmpty. Operand has 147 states, 145 states have (on average 1.710344827586207) internal successors, (248), 146 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:56:44,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-20 22:56:44,918 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:56:44,919 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:56:44,919 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:56:44,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:56:44,925 INFO L85 PathProgramCache]: Analyzing trace with hash 1692155939, now seen corresponding path program 1 times [2021-11-20 22:56:44,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:56:44,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1963919822] [2021-11-20 22:56:44,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:56:44,940 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:56:44,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:56:44,946 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:56:44,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-20 22:56:45,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:56:45,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-20 22:56:45,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:56:45,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-20 22:56:45,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-20 22:56:45,559 INFO L354 Elim1Store]: treesize reduction 96, result has 16.5 percent of original size [2021-11-20 22:56:45,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 53 treesize of output 41 [2021-11-20 22:56:45,596 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-11-20 22:56:45,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-11-20 22:56:45,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:45,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:45,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:45,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 22 [2021-11-20 22:56:45,805 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-11-20 22:56:45,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-11-20 22:56:45,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:45,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-11-20 22:56:45,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-11-20 22:56:45,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2021-11-20 22:56:46,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:56:46,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:56:46,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:56:46,629 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 22:56:46,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1963919822] [2021-11-20 22:56:46,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1963919822] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 22:56:46,630 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:56:46,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-20 22:56:46,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308889297] [2021-11-20 22:56:46,633 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 22:56:46,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 22:56:46,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 22:56:46,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 22:56:46,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-20 22:56:46,668 INFO L87 Difference]: Start difference. First operand has 147 states, 145 states have (on average 1.710344827586207) internal successors, (248), 146 states have internal predecessors, (248), 0 states have call successors, (0), 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 8 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:56:48,713 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:56:50,727 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:56:53,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:56:53,867 INFO L93 Difference]: Finished difference Result 295 states and 495 transitions. [2021-11-20 22:56:53,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 22:56:53,871 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 8 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 43 [2021-11-20 22:56:53,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:56:53,882 INFO L225 Difference]: With dead ends: 295 [2021-11-20 22:56:53,883 INFO L226 Difference]: Without dead ends: 134 [2021-11-20 22:56:53,886 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-20 22:56:53,889 INFO L933 BasicCegarLoop]: 240 mSDtfsCounter, 18 mSDsluCounter, 744 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 984 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2021-11-20 22:56:53,890 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 984 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 176 Invalid, 2 Unknown, 64 Unchecked, 7.0s Time] [2021-11-20 22:56:53,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-11-20 22:56:53,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2021-11-20 22:56:53,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 1.5263157894736843) internal successors, (203), 133 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:56:53,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 203 transitions. [2021-11-20 22:56:53,932 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 203 transitions. Word has length 43 [2021-11-20 22:56:53,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:56:53,933 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 203 transitions. [2021-11-20 22:56:53,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:56:53,934 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 203 transitions. [2021-11-20 22:56:53,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-20 22:56:53,936 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:56:53,936 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:56:53,956 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-20 22:56:54,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 22:56:54,155 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:56:54,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:56:54,156 INFO L85 PathProgramCache]: Analyzing trace with hash 2115802661, now seen corresponding path program 1 times [2021-11-20 22:56:54,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:56:54,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1010455802] [2021-11-20 22:56:54,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:56:54,157 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:56:54,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:56:54,160 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:56:54,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-20 22:56:54,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:56:54,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 22:56:54,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:56:54,512 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-20 22:56:54,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2021-11-20 22:56:54,586 INFO L354 Elim1Store]: treesize reduction 41, result has 18.0 percent of original size [2021-11-20 22:56:54,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 24 [2021-11-20 22:56:54,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-20 22:56:54,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:56:54,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:56:55,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:56:55,044 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 22:56:55,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1010455802] [2021-11-20 22:56:55,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1010455802] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 22:56:55,044 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:56:55,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-20 22:56:55,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468547612] [2021-11-20 22:56:55,045 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 22:56:55,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:56:55,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 22:56:55,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:56:55,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:56:55,048 INFO L87 Difference]: Start difference. First operand 134 states and 203 transitions. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:56:57,064 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:56:58,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:56:58,802 INFO L93 Difference]: Finished difference Result 286 states and 434 transitions. [2021-11-20 22:56:58,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:56:58,804 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 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 43 [2021-11-20 22:56:58,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:56:58,806 INFO L225 Difference]: With dead ends: 286 [2021-11-20 22:56:58,806 INFO L226 Difference]: Without dead ends: 162 [2021-11-20 22:56:58,810 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:56:58,812 INFO L933 BasicCegarLoop]: 177 mSDtfsCounter, 22 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2021-11-20 22:56:58,812 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 449 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 149 Invalid, 1 Unknown, 0 Unchecked, 3.7s Time] [2021-11-20 22:56:58,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-11-20 22:56:58,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 145. [2021-11-20 22:56:58,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.5416666666666667) internal successors, (222), 144 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:56:58,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 222 transitions. [2021-11-20 22:56:58,831 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 222 transitions. Word has length 43 [2021-11-20 22:56:58,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:56:58,832 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 222 transitions. [2021-11-20 22:56:58,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:56:58,832 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 222 transitions. [2021-11-20 22:56:58,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-20 22:56:58,835 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:56:58,835 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:56:58,848 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-20 22:56:59,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 22:56:59,047 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:56:59,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:56:59,048 INFO L85 PathProgramCache]: Analyzing trace with hash -964647941, now seen corresponding path program 1 times [2021-11-20 22:56:59,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:56:59,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1435779699] [2021-11-20 22:56:59,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:56:59,049 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:56:59,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:56:59,050 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:56:59,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-20 22:56:59,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:56:59,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 22:56:59,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:56:59,403 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-20 22:56:59,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2021-11-20 22:56:59,471 INFO L354 Elim1Store]: treesize reduction 41, result has 18.0 percent of original size [2021-11-20 22:56:59,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 24 [2021-11-20 22:56:59,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-20 22:56:59,740 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:56:59,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:57:00,058 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:57:00,058 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 22:57:00,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1435779699] [2021-11-20 22:57:00,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1435779699] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 22:57:00,059 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:57:00,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-20 22:57:00,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217410645] [2021-11-20 22:57:00,059 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 22:57:00,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 22:57:00,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 22:57:00,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 22:57:00,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 22:57:00,061 INFO L87 Difference]: Start difference. First operand 145 states and 222 transitions. Second operand has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:57:02,082 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:57:06,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:57:06,067 INFO L93 Difference]: Finished difference Result 401 states and 611 transitions. [2021-11-20 22:57:06,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 22:57:06,068 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 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 56 [2021-11-20 22:57:06,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:57:06,071 INFO L225 Difference]: With dead ends: 401 [2021-11-20 22:57:06,072 INFO L226 Difference]: Without dead ends: 277 [2021-11-20 22:57:06,073 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 22:57:06,074 INFO L933 BasicCegarLoop]: 246 mSDtfsCounter, 159 mSDsluCounter, 527 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 52 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 773 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2021-11-20 22:57:06,075 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 773 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 441 Invalid, 1 Unknown, 0 Unchecked, 5.9s Time] [2021-11-20 22:57:06,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-11-20 22:57:06,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 161. [2021-11-20 22:57:06,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 1.54375) internal successors, (247), 160 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:57:06,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 247 transitions. [2021-11-20 22:57:06,093 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 247 transitions. Word has length 56 [2021-11-20 22:57:06,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:57:06,093 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 247 transitions. [2021-11-20 22:57:06,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:57:06,094 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 247 transitions. [2021-11-20 22:57:06,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-20 22:57:06,108 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:57:06,108 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:57:06,121 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-20 22:57:06,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 22:57:06,309 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:57:06,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:57:06,310 INFO L85 PathProgramCache]: Analyzing trace with hash 370114448, now seen corresponding path program 1 times [2021-11-20 22:57:06,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:57:06,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [714247655] [2021-11-20 22:57:06,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:57:06,311 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:57:06,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:57:06,312 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:57:06,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-20 22:57:06,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:57:06,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 22:57:06,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:57:06,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 73 [2021-11-20 22:57:06,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 49 [2021-11-20 22:57:07,481 INFO L354 Elim1Store]: treesize reduction 25, result has 45.7 percent of original size [2021-11-20 22:57:07,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 31 [2021-11-20 22:57:07,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-20 22:57:07,692 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:57:07,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:57:07,893 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:57:07,893 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 22:57:07,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [714247655] [2021-11-20 22:57:07,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [714247655] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 22:57:07,894 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:57:07,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-20 22:57:07,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504795598] [2021-11-20 22:57:07,894 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 22:57:07,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:57:07,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 22:57:07,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:57:07,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:57:07,896 INFO L87 Difference]: Start difference. First operand 161 states and 247 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:57:09,913 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:57:11,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:57:11,543 INFO L93 Difference]: Finished difference Result 330 states and 506 transitions. [2021-11-20 22:57:11,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:57:11,545 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 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 57 [2021-11-20 22:57:11,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:57:11,547 INFO L225 Difference]: With dead ends: 330 [2021-11-20 22:57:11,547 INFO L226 Difference]: Without dead ends: 190 [2021-11-20 22:57:11,548 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:57:11,549 INFO L933 BasicCegarLoop]: 210 mSDtfsCounter, 22 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2021-11-20 22:57:11,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 520 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 144 Invalid, 1 Unknown, 0 Unchecked, 3.6s Time] [2021-11-20 22:57:11,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-11-20 22:57:11,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 177. [2021-11-20 22:57:11,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 1.5511363636363635) internal successors, (273), 176 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:57:11,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 273 transitions. [2021-11-20 22:57:11,563 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 273 transitions. Word has length 57 [2021-11-20 22:57:11,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:57:11,564 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 273 transitions. [2021-11-20 22:57:11,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:57:11,564 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 273 transitions. [2021-11-20 22:57:11,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-20 22:57:11,566 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:57:11,566 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:57:11,581 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-20 22:57:11,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 22:57:11,779 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:57:11,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:57:11,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1501432389, now seen corresponding path program 1 times [2021-11-20 22:57:11,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:57:11,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [105911491] [2021-11-20 22:57:11,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:57:11,780 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:57:11,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:57:11,782 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:57:11,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-20 22:57:11,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:57:12,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 22:57:12,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:57:12,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-20 22:57:12,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-20 22:57:12,353 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:57:12,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:57:12,672 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:57:12,672 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 22:57:12,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [105911491] [2021-11-20 22:57:12,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [105911491] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 22:57:12,673 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:57:12,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-20 22:57:12,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701896209] [2021-11-20 22:57:12,673 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 22:57:12,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 22:57:12,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 22:57:12,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 22:57:12,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 22:57:12,675 INFO L87 Difference]: Start difference. First operand 177 states and 273 transitions. Second operand has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 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) [2021-11-20 22:57:14,696 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:57:19,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:57:19,632 INFO L93 Difference]: Finished difference Result 553 states and 852 transitions. [2021-11-20 22:57:19,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 22:57:19,633 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 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 57 [2021-11-20 22:57:19,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:57:19,637 INFO L225 Difference]: With dead ends: 553 [2021-11-20 22:57:19,637 INFO L226 Difference]: Without dead ends: 397 [2021-11-20 22:57:19,638 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 22:57:19,639 INFO L933 BasicCegarLoop]: 135 mSDtfsCounter, 207 mSDsluCounter, 465 mSDsCounter, 0 mSdLazyCounter, 540 mSolverCounterSat, 87 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 540 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2021-11-20 22:57:19,639 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 600 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 540 Invalid, 1 Unknown, 0 Unchecked, 6.9s Time] [2021-11-20 22:57:19,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-11-20 22:57:19,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 217. [2021-11-20 22:57:19,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 1.5972222222222223) internal successors, (345), 216 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:57:19,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 345 transitions. [2021-11-20 22:57:19,663 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 345 transitions. Word has length 57 [2021-11-20 22:57:19,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:57:19,664 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 345 transitions. [2021-11-20 22:57:19,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 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) [2021-11-20 22:57:19,664 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 345 transitions. [2021-11-20 22:57:19,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-20 22:57:19,667 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:57:19,667 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:57:19,696 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-20 22:57:19,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 22:57:19,880 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:57:19,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:57:19,880 INFO L85 PathProgramCache]: Analyzing trace with hash 693703562, now seen corresponding path program 1 times [2021-11-20 22:57:19,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:57:19,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [536003458] [2021-11-20 22:57:19,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:57:19,882 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:57:19,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:57:19,883 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:57:19,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-20 22:57:20,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:57:20,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 22:57:20,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:57:20,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-20 22:57:20,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-20 22:57:20,356 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:57:20,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:57:20,653 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:57:20,653 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 22:57:20,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [536003458] [2021-11-20 22:57:20,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [536003458] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 22:57:20,653 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:57:20,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-20 22:57:20,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5650747] [2021-11-20 22:57:20,654 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 22:57:20,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 22:57:20,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 22:57:20,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 22:57:20,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 22:57:20,656 INFO L87 Difference]: Start difference. First operand 217 states and 345 transitions. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 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) [2021-11-20 22:57:22,679 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:57:24,690 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:57:29,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:57:29,839 INFO L93 Difference]: Finished difference Result 610 states and 961 transitions. [2021-11-20 22:57:29,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 22:57:29,840 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 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 58 [2021-11-20 22:57:29,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:57:29,844 INFO L225 Difference]: With dead ends: 610 [2021-11-20 22:57:29,844 INFO L226 Difference]: Without dead ends: 414 [2021-11-20 22:57:29,845 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 22:57:29,846 INFO L933 BasicCegarLoop]: 142 mSDtfsCounter, 199 mSDsluCounter, 484 mSDsCounter, 0 mSdLazyCounter, 538 mSolverCounterSat, 87 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 626 SdHoareTripleChecker+Invalid, 627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 538 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.1s IncrementalHoareTripleChecker+Time [2021-11-20 22:57:29,860 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 626 Invalid, 627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 538 Invalid, 2 Unknown, 0 Unchecked, 9.1s Time] [2021-11-20 22:57:29,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-11-20 22:57:29,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 241. [2021-11-20 22:57:29,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 1.6333333333333333) internal successors, (392), 240 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:57:29,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 392 transitions. [2021-11-20 22:57:29,873 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 392 transitions. Word has length 58 [2021-11-20 22:57:29,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:57:29,874 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 392 transitions. [2021-11-20 22:57:29,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 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) [2021-11-20 22:57:29,874 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 392 transitions. [2021-11-20 22:57:29,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-20 22:57:29,878 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:57:29,878 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:57:29,898 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-20 22:57:30,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 22:57:30,101 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:57:30,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:57:30,102 INFO L85 PathProgramCache]: Analyzing trace with hash 1139656768, now seen corresponding path program 1 times [2021-11-20 22:57:30,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:57:30,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [65455374] [2021-11-20 22:57:30,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:57:30,102 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:57:30,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:57:30,105 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:57:30,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-20 22:57:30,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:57:30,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 22:57:30,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:57:30,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-20 22:57:30,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-20 22:57:30,628 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:57:30,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:57:31,045 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:57:31,045 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 22:57:31,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [65455374] [2021-11-20 22:57:31,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [65455374] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 22:57:31,046 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:57:31,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-20 22:57:31,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673453763] [2021-11-20 22:57:31,046 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 22:57:31,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 22:57:31,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 22:57:31,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 22:57:31,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 22:57:31,047 INFO L87 Difference]: Start difference. First operand 241 states and 392 transitions. Second operand has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:57:33,063 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:57:37,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:57:37,905 INFO L93 Difference]: Finished difference Result 707 states and 1142 transitions. [2021-11-20 22:57:37,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 22:57:37,907 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 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 86 [2021-11-20 22:57:37,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:57:37,911 INFO L225 Difference]: With dead ends: 707 [2021-11-20 22:57:37,912 INFO L226 Difference]: Without dead ends: 487 [2021-11-20 22:57:37,912 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 22:57:37,913 INFO L933 BasicCegarLoop]: 148 mSDtfsCounter, 274 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 63 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 631 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2021-11-20 22:57:37,914 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [274 Valid, 631 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 514 Invalid, 1 Unknown, 0 Unchecked, 6.8s Time] [2021-11-20 22:57:37,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2021-11-20 22:57:37,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 305. [2021-11-20 22:57:37,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 1.6644736842105263) internal successors, (506), 304 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:57:37,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 506 transitions. [2021-11-20 22:57:37,930 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 506 transitions. Word has length 86 [2021-11-20 22:57:37,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:57:37,930 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 506 transitions. [2021-11-20 22:57:37,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:57:37,931 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 506 transitions. [2021-11-20 22:57:37,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-20 22:57:37,933 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:57:37,933 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:57:37,955 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-20 22:57:38,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 22:57:38,151 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:57:38,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:57:38,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1970468992, now seen corresponding path program 1 times [2021-11-20 22:57:38,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:57:38,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [900535372] [2021-11-20 22:57:38,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:57:38,153 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:57:38,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:57:38,153 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:57:38,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-20 22:57:38,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:57:38,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 22:57:38,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:57:38,527 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-20 22:57:38,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2021-11-20 22:57:38,590 INFO L354 Elim1Store]: treesize reduction 41, result has 18.0 percent of original size [2021-11-20 22:57:38,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 24 [2021-11-20 22:57:38,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-20 22:57:38,922 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-20 22:57:38,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:57:39,300 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-20 22:57:39,300 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 22:57:39,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [900535372] [2021-11-20 22:57:39,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [900535372] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 22:57:39,301 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:57:39,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-20 22:57:39,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707145189] [2021-11-20 22:57:39,301 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 22:57:39,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 22:57:39,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 22:57:39,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 22:57:39,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 22:57:39,303 INFO L87 Difference]: Start difference. First operand 305 states and 506 transitions. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 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) [2021-11-20 22:57:41,319 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:57:44,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:57:44,976 INFO L93 Difference]: Finished difference Result 679 states and 1103 transitions. [2021-11-20 22:57:44,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 22:57:44,977 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 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 86 [2021-11-20 22:57:44,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:57:44,980 INFO L225 Difference]: With dead ends: 679 [2021-11-20 22:57:44,980 INFO L226 Difference]: Without dead ends: 395 [2021-11-20 22:57:44,981 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 165 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 22:57:44,981 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 155 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 73 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2021-11-20 22:57:44,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 407 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 356 Invalid, 1 Unknown, 0 Unchecked, 5.6s Time] [2021-11-20 22:57:44,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2021-11-20 22:57:44,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 305. [2021-11-20 22:57:44,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 1.6480263157894737) internal successors, (501), 304 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:57:44,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 501 transitions. [2021-11-20 22:57:44,995 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 501 transitions. Word has length 86 [2021-11-20 22:57:44,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:57:44,995 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 501 transitions. [2021-11-20 22:57:44,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 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) [2021-11-20 22:57:44,996 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 501 transitions. [2021-11-20 22:57:44,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-20 22:57:44,997 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:57:44,998 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, 1, 1, 1, 1, 1, 1] [2021-11-20 22:57:45,015 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-20 22:57:45,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 22:57:45,212 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:57:45,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:57:45,212 INFO L85 PathProgramCache]: Analyzing trace with hash 803111263, now seen corresponding path program 1 times [2021-11-20 22:57:45,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:57:45,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [884523703] [2021-11-20 22:57:45,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:57:45,213 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:57:45,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:57:45,214 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:57:45,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-20 22:57:45,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:57:45,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 22:57:45,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:57:45,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-20 22:57:45,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-20 22:57:45,761 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:57:45,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:57:46,150 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:57:46,151 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 22:57:46,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [884523703] [2021-11-20 22:57:46,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [884523703] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 22:57:46,151 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:57:46,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-20 22:57:46,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627943870] [2021-11-20 22:57:46,152 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 22:57:46,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 22:57:46,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 22:57:46,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 22:57:46,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 22:57:46,153 INFO L87 Difference]: Start difference. First operand 305 states and 501 transitions. Second operand has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:57:48,166 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:57:50,176 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:57:54,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:57:54,531 INFO L93 Difference]: Finished difference Result 797 states and 1287 transitions. [2021-11-20 22:57:54,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 22:57:54,532 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 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 [2021-11-20 22:57:54,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:57:54,536 INFO L225 Difference]: With dead ends: 797 [2021-11-20 22:57:54,536 INFO L226 Difference]: Without dead ends: 513 [2021-11-20 22:57:54,537 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 22:57:54,538 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 199 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 83 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2021-11-20 22:57:54,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 463 Invalid, 495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 410 Invalid, 2 Unknown, 0 Unchecked, 8.3s Time] [2021-11-20 22:57:54,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2021-11-20 22:57:54,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 342. [2021-11-20 22:57:54,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 1.656891495601173) internal successors, (565), 341 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:57:54,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 565 transitions. [2021-11-20 22:57:54,554 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 565 transitions. Word has length 91 [2021-11-20 22:57:54,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:57:54,555 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 565 transitions. [2021-11-20 22:57:54,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:57:54,555 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 565 transitions. [2021-11-20 22:57:54,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-20 22:57:54,557 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:57:54,557 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, 1] [2021-11-20 22:57:54,572 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-20 22:57:54,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 22:57:54,768 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:57:54,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:57:54,768 INFO L85 PathProgramCache]: Analyzing trace with hash 542083086, now seen corresponding path program 1 times [2021-11-20 22:57:54,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:57:54,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [816989510] [2021-11-20 22:57:54,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:57:54,769 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:57:54,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:57:54,770 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:57:54,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-20 22:57:54,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:57:54,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 22:57:54,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:57:54,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-20 22:57:55,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-20 22:57:55,298 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:57:55,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:57:55,673 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:57:55,674 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 22:57:55,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [816989510] [2021-11-20 22:57:55,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [816989510] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 22:57:55,674 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:57:55,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-20 22:57:55,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388228263] [2021-11-20 22:57:55,674 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 22:57:55,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 22:57:55,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 22:57:55,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 22:57:55,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 22:57:55,676 INFO L87 Difference]: Start difference. First operand 342 states and 565 transitions. Second operand has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:57:57,687 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:58:02,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:58:02,630 INFO L93 Difference]: Finished difference Result 829 states and 1342 transitions. [2021-11-20 22:58:02,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 22:58:02,631 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-11-20 22:58:02,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:58:02,635 INFO L225 Difference]: With dead ends: 829 [2021-11-20 22:58:02,635 INFO L226 Difference]: Without dead ends: 508 [2021-11-20 22:58:02,636 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 22:58:02,637 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 249 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 86 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 610 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2021-11-20 22:58:02,637 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 610 Invalid, 613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 526 Invalid, 1 Unknown, 0 Unchecked, 6.9s Time] [2021-11-20 22:58:02,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2021-11-20 22:58:02,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 342. [2021-11-20 22:58:02,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 1.651026392961877) internal successors, (563), 341 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:58:02,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 563 transitions. [2021-11-20 22:58:02,652 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 563 transitions. Word has length 92 [2021-11-20 22:58:02,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:58:02,652 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 563 transitions. [2021-11-20 22:58:02,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:58:02,653 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 563 transitions. [2021-11-20 22:58:02,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-20 22:58:02,654 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:58:02,655 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:58:02,671 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-20 22:58:02,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 22:58:02,867 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:58:02,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:58:02,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1041872299, now seen corresponding path program 1 times [2021-11-20 22:58:02,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:58:02,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1683035008] [2021-11-20 22:58:02,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:58:02,868 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:58:02,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:58:02,870 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:58:02,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-20 22:58:03,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:58:03,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 22:58:03,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:58:03,285 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-20 22:58:03,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2021-11-20 22:58:03,343 INFO L354 Elim1Store]: treesize reduction 41, result has 18.0 percent of original size [2021-11-20 22:58:03,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 24 [2021-11-20 22:58:03,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-20 22:58:03,674 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-20 22:58:03,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:58:04,075 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-20 22:58:04,075 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 22:58:04,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1683035008] [2021-11-20 22:58:04,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1683035008] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 22:58:04,075 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:58:04,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-20 22:58:04,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067798972] [2021-11-20 22:58:04,076 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 22:58:04,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 22:58:04,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 22:58:04,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 22:58:04,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 22:58:04,077 INFO L87 Difference]: Start difference. First operand 342 states and 563 transitions. Second operand has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:58:06,089 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:58:10,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:58:10,102 INFO L93 Difference]: Finished difference Result 751 states and 1216 transitions. [2021-11-20 22:58:10,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 22:58:10,103 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 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 99 [2021-11-20 22:58:10,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:58:10,106 INFO L225 Difference]: With dead ends: 751 [2021-11-20 22:58:10,106 INFO L226 Difference]: Without dead ends: 430 [2021-11-20 22:58:10,107 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 191 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 22:58:10,107 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 191 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 75 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2021-11-20 22:58:10,108 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 531 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 446 Invalid, 1 Unknown, 0 Unchecked, 6.0s Time] [2021-11-20 22:58:10,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2021-11-20 22:58:10,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 342. [2021-11-20 22:58:10,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 1.6304985337243403) internal successors, (556), 341 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:58:10,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 556 transitions. [2021-11-20 22:58:10,121 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 556 transitions. Word has length 99 [2021-11-20 22:58:10,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:58:10,122 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 556 transitions. [2021-11-20 22:58:10,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:58:10,122 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 556 transitions. [2021-11-20 22:58:10,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-20 22:58:10,124 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:58:10,124 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:58:10,152 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-11-20 22:58:10,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 22:58:10,360 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:58:10,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:58:10,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1658950081, now seen corresponding path program 1 times [2021-11-20 22:58:10,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:58:10,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1001062148] [2021-11-20 22:58:10,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:58:10,361 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:58:10,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:58:10,362 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:58:10,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-20 22:58:10,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:58:10,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 22:58:10,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:58:10,733 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-20 22:58:10,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2021-11-20 22:58:10,789 INFO L354 Elim1Store]: treesize reduction 41, result has 18.0 percent of original size [2021-11-20 22:58:10,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 24 [2021-11-20 22:58:10,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-20 22:58:11,095 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-20 22:58:11,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:58:11,473 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-20 22:58:11,473 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 22:58:11,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1001062148] [2021-11-20 22:58:11,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1001062148] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 22:58:11,473 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:58:11,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-20 22:58:11,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396837122] [2021-11-20 22:58:11,474 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 22:58:11,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 22:58:11,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 22:58:11,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 22:58:11,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 22:58:11,475 INFO L87 Difference]: Start difference. First operand 342 states and 556 transitions. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:58:13,498 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:58:15,506 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:58:19,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:58:19,325 INFO L93 Difference]: Finished difference Result 751 states and 1203 transitions. [2021-11-20 22:58:19,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 22:58:19,326 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 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 99 [2021-11-20 22:58:19,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:58:19,328 INFO L225 Difference]: With dead ends: 751 [2021-11-20 22:58:19,329 INFO L226 Difference]: Without dead ends: 430 [2021-11-20 22:58:19,329 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 191 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 22:58:19,330 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 160 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 69 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 545 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2021-11-20 22:58:19,330 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 545 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 452 Invalid, 2 Unknown, 0 Unchecked, 7.8s Time] [2021-11-20 22:58:19,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2021-11-20 22:58:19,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 342. [2021-11-20 22:58:19,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 1.6099706744868034) internal successors, (549), 341 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:58:19,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 549 transitions. [2021-11-20 22:58:19,342 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 549 transitions. Word has length 99 [2021-11-20 22:58:19,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:58:19,342 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 549 transitions. [2021-11-20 22:58:19,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:58:19,343 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 549 transitions. [2021-11-20 22:58:19,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-20 22:58:19,344 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:58:19,344 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:58:19,363 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-20 22:58:19,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 22:58:19,559 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:58:19,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:58:19,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1101624705, now seen corresponding path program 1 times [2021-11-20 22:58:19,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:58:19,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1043827082] [2021-11-20 22:58:19,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:58:19,560 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:58:19,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:58:19,561 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:58:19,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-20 22:58:19,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:58:19,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 22:58:19,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:58:19,939 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-20 22:58:19,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2021-11-20 22:58:20,006 INFO L354 Elim1Store]: treesize reduction 41, result has 18.0 percent of original size [2021-11-20 22:58:20,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 24 [2021-11-20 22:58:20,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-20 22:58:20,333 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-20 22:58:20,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:58:20,709 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-20 22:58:20,710 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 22:58:20,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1043827082] [2021-11-20 22:58:20,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1043827082] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 22:58:20,710 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:58:20,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-20 22:58:20,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782274773] [2021-11-20 22:58:20,711 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 22:58:20,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 22:58:20,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 22:58:20,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 22:58:20,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 22:58:20,713 INFO L87 Difference]: Start difference. First operand 342 states and 549 transitions. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 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) [2021-11-20 22:58:22,729 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:58:25,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:58:25,729 INFO L93 Difference]: Finished difference Result 751 states and 1190 transitions. [2021-11-20 22:58:25,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 22:58:25,730 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 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 100 [2021-11-20 22:58:25,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:58:25,732 INFO L225 Difference]: With dead ends: 751 [2021-11-20 22:58:25,732 INFO L226 Difference]: Without dead ends: 430 [2021-11-20 22:58:25,733 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 193 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 22:58:25,734 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 156 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 71 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2021-11-20 22:58:25,734 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 409 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 354 Invalid, 1 Unknown, 0 Unchecked, 5.0s Time] [2021-11-20 22:58:25,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2021-11-20 22:58:25,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 342. [2021-11-20 22:58:25,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 1.5894428152492668) internal successors, (542), 341 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) [2021-11-20 22:58:25,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 542 transitions. [2021-11-20 22:58:25,748 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 542 transitions. Word has length 100 [2021-11-20 22:58:25,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:58:25,748 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 542 transitions. [2021-11-20 22:58:25,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 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) [2021-11-20 22:58:25,749 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 542 transitions. [2021-11-20 22:58:25,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-20 22:58:25,750 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:58:25,750 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, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:58:25,768 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-20 22:58:25,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 22:58:25,965 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:58:25,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:58:25,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1444609756, now seen corresponding path program 1 times [2021-11-20 22:58:25,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:58:25,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [645479795] [2021-11-20 22:58:25,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:58:25,966 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:58:25,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:58:25,970 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:58:26,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-20 22:58:26,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:58:26,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 22:58:26,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:58:26,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-20 22:58:26,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-20 22:58:26,546 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:58:26,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:58:26,974 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:58:26,974 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 22:58:26,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [645479795] [2021-11-20 22:58:26,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [645479795] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 22:58:26,975 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:58:26,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-20 22:58:26,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263422073] [2021-11-20 22:58:26,975 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 22:58:26,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 22:58:26,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 22:58:26,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 22:58:26,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 22:58:26,977 INFO L87 Difference]: Start difference. First operand 342 states and 542 transitions. Second operand has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:58:28,989 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:58:32,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:58:32,983 INFO L93 Difference]: Finished difference Result 867 states and 1358 transitions. [2021-11-20 22:58:32,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 22:58:32,985 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 0 states have call successors, (0), 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 100 [2021-11-20 22:58:32,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:58:32,988 INFO L225 Difference]: With dead ends: 867 [2021-11-20 22:58:32,988 INFO L226 Difference]: Without dead ends: 546 [2021-11-20 22:58:32,989 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 22:58:32,990 INFO L933 BasicCegarLoop]: 122 mSDtfsCounter, 233 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 87 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2021-11-20 22:58:32,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 429 Invalid, 480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 392 Invalid, 1 Unknown, 0 Unchecked, 5.9s Time] [2021-11-20 22:58:32,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-11-20 22:58:33,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 385. [2021-11-20 22:58:33,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 1.59375) internal successors, (612), 384 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:58:33,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 612 transitions. [2021-11-20 22:58:33,007 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 612 transitions. Word has length 100 [2021-11-20 22:58:33,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:58:33,008 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 612 transitions. [2021-11-20 22:58:33,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:58:33,008 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 612 transitions. [2021-11-20 22:58:33,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-20 22:58:33,010 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:58:33,010 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, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:58:33,027 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-11-20 22:58:33,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 22:58:33,227 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:58:33,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:58:33,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1700511469, now seen corresponding path program 1 times [2021-11-20 22:58:33,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:58:33,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1772617637] [2021-11-20 22:58:33,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:58:33,229 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:58:33,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:58:33,230 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:58:33,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-20 22:58:33,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:58:33,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 22:58:33,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:58:33,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-20 22:58:33,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-20 22:58:33,838 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:58:33,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:58:34,381 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:58:34,381 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 22:58:34,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1772617637] [2021-11-20 22:58:34,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1772617637] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 22:58:34,382 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:58:34,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-20 22:58:34,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143371417] [2021-11-20 22:58:34,382 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 22:58:34,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 22:58:34,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 22:58:34,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 22:58:34,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 22:58:34,383 INFO L87 Difference]: Start difference. First operand 385 states and 612 transitions. Second operand has 6 states, 6 states have (on average 23.5) internal successors, (141), 6 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:58:36,399 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:58:40,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:58:40,225 INFO L93 Difference]: Finished difference Result 909 states and 1426 transitions. [2021-11-20 22:58:40,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 22:58:40,227 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.5) internal successors, (141), 6 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2021-11-20 22:58:40,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:58:40,230 INFO L225 Difference]: With dead ends: 909 [2021-11-20 22:58:40,230 INFO L226 Difference]: Without dead ends: 541 [2021-11-20 22:58:40,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 22:58:40,232 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 222 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 81 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 445 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2021-11-20 22:58:40,232 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 445 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 393 Invalid, 1 Unknown, 0 Unchecked, 5.8s Time] [2021-11-20 22:58:40,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2021-11-20 22:58:40,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 387. [2021-11-20 22:58:40,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 386 states have (on average 1.5932642487046633) internal successors, (615), 386 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:58:40,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 615 transitions. [2021-11-20 22:58:40,247 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 615 transitions. Word has length 101 [2021-11-20 22:58:40,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:58:40,247 INFO L470 AbstractCegarLoop]: Abstraction has 387 states and 615 transitions. [2021-11-20 22:58:40,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.5) internal successors, (141), 6 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:58:40,248 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 615 transitions. [2021-11-20 22:58:40,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-20 22:58:40,249 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:58:40,250 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:58:40,276 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-20 22:58:40,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 22:58:40,481 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:58:40,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:58:40,481 INFO L85 PathProgramCache]: Analyzing trace with hash -322614140, now seen corresponding path program 1 times [2021-11-20 22:58:40,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:58:40,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1618091308] [2021-11-20 22:58:40,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:58:40,482 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:58:40,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:58:40,483 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:58:40,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-20 22:58:40,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:58:40,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 22:58:40,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:58:40,856 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-20 22:58:40,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2021-11-20 22:58:40,912 INFO L354 Elim1Store]: treesize reduction 41, result has 18.0 percent of original size [2021-11-20 22:58:40,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 24 [2021-11-20 22:58:40,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-20 22:58:41,218 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-20 22:58:41,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:58:41,638 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-20 22:58:41,638 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 22:58:41,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1618091308] [2021-11-20 22:58:41,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1618091308] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 22:58:41,639 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:58:41,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-20 22:58:41,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324768321] [2021-11-20 22:58:41,639 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 22:58:41,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 22:58:41,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 22:58:41,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 22:58:41,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 22:58:41,640 INFO L87 Difference]: Start difference. First operand 387 states and 615 transitions. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:58:43,655 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:58:45,664 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:58:48,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:58:48,548 INFO L93 Difference]: Finished difference Result 837 states and 1316 transitions. [2021-11-20 22:58:48,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 22:58:48,550 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2021-11-20 22:58:48,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:58:48,553 INFO L225 Difference]: With dead ends: 837 [2021-11-20 22:58:48,553 INFO L226 Difference]: Without dead ends: 471 [2021-11-20 22:58:48,554 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 195 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 22:58:48,555 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 150 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 69 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2021-11-20 22:58:48,555 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 432 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 355 Invalid, 2 Unknown, 0 Unchecked, 6.8s Time] [2021-11-20 22:58:48,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2021-11-20 22:58:48,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 387. [2021-11-20 22:58:48,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 386 states have (on average 1.572538860103627) internal successors, (607), 386 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:58:48,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 607 transitions. [2021-11-20 22:58:48,570 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 607 transitions. Word has length 101 [2021-11-20 22:58:48,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:58:48,570 INFO L470 AbstractCegarLoop]: Abstraction has 387 states and 607 transitions. [2021-11-20 22:58:48,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:58:48,571 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 607 transitions. [2021-11-20 22:58:48,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-20 22:58:48,572 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:58:48,573 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:58:48,587 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-11-20 22:58:48,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 22:58:48,790 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:58:48,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:58:48,791 INFO L85 PathProgramCache]: Analyzing trace with hash -1261297308, now seen corresponding path program 1 times [2021-11-20 22:58:48,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:58:48,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1313071193] [2021-11-20 22:58:48,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:58:48,791 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:58:48,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:58:48,792 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:58:48,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-20 22:58:49,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:58:49,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 22:58:49,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:58:49,191 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-20 22:58:49,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2021-11-20 22:58:49,245 INFO L354 Elim1Store]: treesize reduction 41, result has 18.0 percent of original size [2021-11-20 22:58:49,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 24 [2021-11-20 22:58:49,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-20 22:58:49,565 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-20 22:58:49,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:58:49,940 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-20 22:58:49,941 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 22:58:49,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1313071193] [2021-11-20 22:58:49,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1313071193] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 22:58:49,941 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:58:49,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-20 22:58:49,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233679706] [2021-11-20 22:58:49,942 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 22:58:49,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 22:58:49,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 22:58:49,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 22:58:49,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 22:58:49,943 INFO L87 Difference]: Start difference. First operand 387 states and 607 transitions. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 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) [2021-11-20 22:58:51,965 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:58:55,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:58:55,940 INFO L93 Difference]: Finished difference Result 817 states and 1275 transitions. [2021-11-20 22:58:55,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 22:58:55,941 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 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 102 [2021-11-20 22:58:55,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:58:55,944 INFO L225 Difference]: With dead ends: 817 [2021-11-20 22:58:55,944 INFO L226 Difference]: Without dead ends: 451 [2021-11-20 22:58:55,944 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 197 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 22:58:55,946 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 132 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 56 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 579 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2021-11-20 22:58:55,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 579 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 430 Invalid, 1 Unknown, 0 Unchecked, 5.9s Time] [2021-11-20 22:58:55,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-11-20 22:58:55,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 387. [2021-11-20 22:58:55,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 386 states have (on average 1.5518134715025906) internal successors, (599), 386 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:58:55,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 599 transitions. [2021-11-20 22:58:55,969 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 599 transitions. Word has length 102 [2021-11-20 22:58:55,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:58:55,970 INFO L470 AbstractCegarLoop]: Abstraction has 387 states and 599 transitions. [2021-11-20 22:58:55,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 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) [2021-11-20 22:58:55,970 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 599 transitions. [2021-11-20 22:58:55,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-20 22:58:55,972 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:58:55,972 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:58:55,991 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-20 22:58:56,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 22:58:56,188 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:58:56,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:58:56,188 INFO L85 PathProgramCache]: Analyzing trace with hash -453880551, now seen corresponding path program 1 times [2021-11-20 22:58:56,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:58:56,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1216800568] [2021-11-20 22:58:56,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:58:56,189 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:58:56,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:58:56,191 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:58:56,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-20 22:58:56,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:58:56,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 22:58:56,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:58:56,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-20 22:58:56,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-20 22:58:56,748 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-20 22:58:56,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:58:57,172 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-20 22:58:57,172 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 22:58:57,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1216800568] [2021-11-20 22:58:57,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1216800568] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 22:58:57,173 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:58:57,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-20 22:58:57,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227873735] [2021-11-20 22:58:57,176 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 22:58:57,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 22:58:57,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 22:58:57,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 22:58:57,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 22:58:57,177 INFO L87 Difference]: Start difference. First operand 387 states and 599 transitions. Second operand has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:58:59,190 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:59:03,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:59:03,287 INFO L93 Difference]: Finished difference Result 929 states and 1430 transitions. [2021-11-20 22:59:03,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 22:59:03,288 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 0 states have call successors, (0), 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 113 [2021-11-20 22:59:03,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:59:03,291 INFO L225 Difference]: With dead ends: 929 [2021-11-20 22:59:03,291 INFO L226 Difference]: Without dead ends: 563 [2021-11-20 22:59:03,292 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 22:59:03,292 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 235 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 64 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 573 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2021-11-20 22:59:03,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 573 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 455 Invalid, 1 Unknown, 0 Unchecked, 6.0s Time] [2021-11-20 22:59:03,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2021-11-20 22:59:03,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 417. [2021-11-20 22:59:03,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 416 states have (on average 1.5408653846153846) internal successors, (641), 416 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:59:03,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 641 transitions. [2021-11-20 22:59:03,310 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 641 transitions. Word has length 113 [2021-11-20 22:59:03,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:59:03,311 INFO L470 AbstractCegarLoop]: Abstraction has 417 states and 641 transitions. [2021-11-20 22:59:03,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:59:03,311 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 641 transitions. [2021-11-20 22:59:03,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-20 22:59:03,313 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:59:03,313 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:59:03,330 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2021-11-20 22:59:03,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 22:59:03,527 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:59:03,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:59:03,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1285516941, now seen corresponding path program 1 times [2021-11-20 22:59:03,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:59:03,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [172489047] [2021-11-20 22:59:03,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:59:03,528 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:59:03,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:59:03,529 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:59:03,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-20 22:59:03,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:59:03,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 22:59:03,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:59:03,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-20 22:59:03,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-20 22:59:04,133 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-20 22:59:04,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:59:04,549 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-20 22:59:04,549 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 22:59:04,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [172489047] [2021-11-20 22:59:04,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [172489047] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 22:59:04,549 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:59:04,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-20 22:59:04,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229262093] [2021-11-20 22:59:04,550 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 22:59:04,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 22:59:04,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 22:59:04,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 22:59:04,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 22:59:04,551 INFO L87 Difference]: Start difference. First operand 417 states and 641 transitions. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:59:06,565 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:59:09,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:59:09,916 INFO L93 Difference]: Finished difference Result 945 states and 1445 transitions. [2021-11-20 22:59:09,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 22:59:09,918 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 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 114 [2021-11-20 22:59:09,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:59:09,922 INFO L225 Difference]: With dead ends: 945 [2021-11-20 22:59:09,922 INFO L226 Difference]: Without dead ends: 549 [2021-11-20 22:59:09,923 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 22:59:09,924 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 228 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 72 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2021-11-20 22:59:09,924 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 442 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 356 Invalid, 1 Unknown, 0 Unchecked, 5.3s Time] [2021-11-20 22:59:09,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2021-11-20 22:59:09,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 417. [2021-11-20 22:59:09,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 416 states have (on average 1.5264423076923077) internal successors, (635), 416 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:59:09,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 635 transitions. [2021-11-20 22:59:09,941 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 635 transitions. Word has length 114 [2021-11-20 22:59:09,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:59:09,942 INFO L470 AbstractCegarLoop]: Abstraction has 417 states and 635 transitions. [2021-11-20 22:59:09,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:59:09,942 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 635 transitions. [2021-11-20 22:59:09,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-20 22:59:09,944 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:59:09,944 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:59:09,963 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-20 22:59:10,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 22:59:10,158 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:59:10,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:59:10,158 INFO L85 PathProgramCache]: Analyzing trace with hash -827998924, now seen corresponding path program 1 times [2021-11-20 22:59:10,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:59:10,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2113804193] [2021-11-20 22:59:10,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:59:10,159 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:59:10,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:59:10,160 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:59:10,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-20 22:59:10,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:59:10,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 22:59:10,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:59:10,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-20 22:59:10,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-20 22:59:10,809 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-20 22:59:10,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:59:11,222 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-20 22:59:11,222 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 22:59:11,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2113804193] [2021-11-20 22:59:11,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2113804193] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 22:59:11,222 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:59:11,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-20 22:59:11,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689420089] [2021-11-20 22:59:11,223 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 22:59:11,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 22:59:11,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 22:59:11,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 22:59:11,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 22:59:11,228 INFO L87 Difference]: Start difference. First operand 417 states and 635 transitions. Second operand has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:59:13,241 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:59:15,251 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:59:18,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:59:18,990 INFO L93 Difference]: Finished difference Result 987 states and 1496 transitions. [2021-11-20 22:59:18,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 22:59:18,992 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 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 116 [2021-11-20 22:59:18,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:59:18,995 INFO L225 Difference]: With dead ends: 987 [2021-11-20 22:59:18,995 INFO L226 Difference]: Without dead ends: 591 [2021-11-20 22:59:18,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 22:59:18,996 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 174 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 66 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2021-11-20 22:59:18,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 600 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 469 Invalid, 2 Unknown, 0 Unchecked, 7.7s Time] [2021-11-20 22:59:18,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-11-20 22:59:19,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 445. [2021-11-20 22:59:19,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 444 states have (on average 1.5135135135135136) internal successors, (672), 444 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:59:19,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 672 transitions. [2021-11-20 22:59:19,015 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 672 transitions. Word has length 116 [2021-11-20 22:59:19,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:59:19,015 INFO L470 AbstractCegarLoop]: Abstraction has 445 states and 672 transitions. [2021-11-20 22:59:19,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:59:19,015 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 672 transitions. [2021-11-20 22:59:19,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-20 22:59:19,017 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:59:19,017 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:59:19,043 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (21)] Ended with exit code 0 [2021-11-20 22:59:19,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 22:59:19,231 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:59:19,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:59:19,231 INFO L85 PathProgramCache]: Analyzing trace with hash 1220129760, now seen corresponding path program 1 times [2021-11-20 22:59:19,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:59:19,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1873852270] [2021-11-20 22:59:19,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:59:19,232 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:59:19,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:59:19,233 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:59:19,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-20 22:59:19,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:59:19,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 22:59:19,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:59:19,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-20 22:59:19,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-20 22:59:19,795 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-20 22:59:19,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:59:20,211 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-20 22:59:20,211 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 22:59:20,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1873852270] [2021-11-20 22:59:20,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1873852270] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 22:59:20,212 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:59:20,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-20 22:59:20,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353523875] [2021-11-20 22:59:20,212 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 22:59:20,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 22:59:20,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 22:59:20,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 22:59:20,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 22:59:20,213 INFO L87 Difference]: Start difference. First operand 445 states and 672 transitions. Second operand has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:59:22,227 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:59:24,246 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:59:28,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:59:28,595 INFO L93 Difference]: Finished difference Result 993 states and 1492 transitions. [2021-11-20 22:59:28,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 22:59:28,595 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117 [2021-11-20 22:59:28,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:59:28,598 INFO L225 Difference]: With dead ends: 993 [2021-11-20 22:59:28,598 INFO L226 Difference]: Without dead ends: 569 [2021-11-20 22:59:28,599 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 22:59:28,600 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 162 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 66 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2021-11-20 22:59:28,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 571 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 466 Invalid, 2 Unknown, 0 Unchecked, 8.3s Time] [2021-11-20 22:59:28,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2021-11-20 22:59:28,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 445. [2021-11-20 22:59:28,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 444 states have (on average 1.4977477477477477) internal successors, (665), 444 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:59:28,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 665 transitions. [2021-11-20 22:59:28,620 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 665 transitions. Word has length 117 [2021-11-20 22:59:28,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:59:28,620 INFO L470 AbstractCegarLoop]: Abstraction has 445 states and 665 transitions. [2021-11-20 22:59:28,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:59:28,621 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 665 transitions. [2021-11-20 22:59:28,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-20 22:59:28,622 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:59:28,622 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-20 22:59:28,641 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-20 22:59:28,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 22:59:28,837 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:59:28,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:59:28,837 INFO L85 PathProgramCache]: Analyzing trace with hash 460331368, now seen corresponding path program 1 times [2021-11-20 22:59:28,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:59:28,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [371599849] [2021-11-20 22:59:28,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:59:28,838 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:59:28,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:59:28,839 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:59:28,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-20 22:59:28,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:59:28,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 22:59:28,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:59:29,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-20 22:59:29,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-20 22:59:29,441 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-20 22:59:29,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:59:29,888 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-20 22:59:29,888 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 22:59:29,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [371599849] [2021-11-20 22:59:29,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [371599849] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 22:59:29,888 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:59:29,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-20 22:59:29,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031082985] [2021-11-20 22:59:29,889 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 22:59:29,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 22:59:29,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 22:59:29,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 22:59:29,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 22:59:29,890 INFO L87 Difference]: Start difference. First operand 445 states and 665 transitions. Second operand has 6 states, 6 states have (on average 20.5) internal successors, (123), 6 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:59:31,907 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:59:36,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:59:36,380 INFO L93 Difference]: Finished difference Result 1035 states and 1539 transitions. [2021-11-20 22:59:36,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 22:59:36,381 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.5) internal successors, (123), 6 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 123 [2021-11-20 22:59:36,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:59:36,385 INFO L225 Difference]: With dead ends: 1035 [2021-11-20 22:59:36,385 INFO L226 Difference]: Without dead ends: 611 [2021-11-20 22:59:36,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 22:59:36,386 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 148 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 63 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2021-11-20 22:59:36,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 571 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 467 Invalid, 1 Unknown, 0 Unchecked, 6.4s Time] [2021-11-20 22:59:36,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2021-11-20 22:59:36,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 480. [2021-11-20 22:59:36,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 479 states have (on average 1.4906054279749479) internal successors, (714), 479 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:59:36,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 714 transitions. [2021-11-20 22:59:36,401 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 714 transitions. Word has length 123 [2021-11-20 22:59:36,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:59:36,402 INFO L470 AbstractCegarLoop]: Abstraction has 480 states and 714 transitions. [2021-11-20 22:59:36,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.5) internal successors, (123), 6 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:59:36,402 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 714 transitions. [2021-11-20 22:59:36,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-20 22:59:36,404 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:59:36,404 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-20 22:59:36,432 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-20 22:59:36,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 22:59:36,617 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:59:36,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:59:36,617 INFO L85 PathProgramCache]: Analyzing trace with hash -1374578505, now seen corresponding path program 1 times [2021-11-20 22:59:36,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:59:36,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [209843055] [2021-11-20 22:59:36,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:59:36,618 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:59:36,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:59:36,619 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:59:36,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-20 22:59:36,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:59:36,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 22:59:36,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:59:36,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-20 22:59:37,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-20 22:59:37,290 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 92 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-20 22:59:37,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:59:37,747 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 92 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-20 22:59:37,747 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 22:59:37,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [209843055] [2021-11-20 22:59:37,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [209843055] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 22:59:37,748 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:59:37,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-20 22:59:37,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008602523] [2021-11-20 22:59:37,748 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 22:59:37,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 22:59:37,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 22:59:37,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 22:59:37,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 22:59:37,749 INFO L87 Difference]: Start difference. First operand 480 states and 714 transitions. Second operand has 6 states, 6 states have (on average 20.833333333333332) internal successors, (125), 6 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:59:39,763 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:59:41,773 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:59:44,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:59:44,953 INFO L93 Difference]: Finished difference Result 1061 states and 1572 transitions. [2021-11-20 22:59:44,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 22:59:44,954 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.833333333333332) internal successors, (125), 6 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 124 [2021-11-20 22:59:44,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:59:44,957 INFO L225 Difference]: With dead ends: 1061 [2021-11-20 22:59:44,957 INFO L226 Difference]: Without dead ends: 602 [2021-11-20 22:59:44,958 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 22:59:44,959 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 144 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 65 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2021-11-20 22:59:44,959 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 448 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 367 Invalid, 2 Unknown, 0 Unchecked, 7.1s Time] [2021-11-20 22:59:44,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2021-11-20 22:59:44,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 480. [2021-11-20 22:59:44,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 479 states have (on average 1.4822546972860124) internal successors, (710), 479 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:59:44,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 710 transitions. [2021-11-20 22:59:44,977 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 710 transitions. Word has length 124 [2021-11-20 22:59:44,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:59:44,978 INFO L470 AbstractCegarLoop]: Abstraction has 480 states and 710 transitions. [2021-11-20 22:59:44,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.833333333333332) internal successors, (125), 6 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:59:44,978 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 710 transitions. [2021-11-20 22:59:44,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-20 22:59:44,980 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:59:44,980 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:59:44,999 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-20 22:59:45,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 22:59:45,197 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:59:45,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:59:45,197 INFO L85 PathProgramCache]: Analyzing trace with hash -650392581, now seen corresponding path program 1 times [2021-11-20 22:59:45,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:59:45,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1388159831] [2021-11-20 22:59:45,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:59:45,198 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:59:45,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:59:45,199 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:59:45,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-20 22:59:45,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:59:45,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 22:59:45,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:59:45,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-20 22:59:45,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-20 22:59:45,881 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-20 22:59:45,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:59:46,415 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-20 22:59:46,416 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 22:59:46,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1388159831] [2021-11-20 22:59:46,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1388159831] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 22:59:46,416 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:59:46,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-20 22:59:46,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867433614] [2021-11-20 22:59:46,416 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 22:59:46,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 22:59:46,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 22:59:46,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 22:59:46,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 22:59:46,417 INFO L87 Difference]: Start difference. First operand 480 states and 710 transitions. Second operand has 6 states, 6 states have (on average 24.166666666666668) internal successors, (145), 6 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:59:48,428 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:59:51,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:59:51,277 INFO L93 Difference]: Finished difference Result 1104 states and 1624 transitions. [2021-11-20 22:59:51,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 22:59:51,278 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 24.166666666666668) internal successors, (145), 6 states have internal predecessors, (145), 0 states have call successors, (0), 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 141 [2021-11-20 22:59:51,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:59:51,281 INFO L225 Difference]: With dead ends: 1104 [2021-11-20 22:59:51,281 INFO L226 Difference]: Without dead ends: 645 [2021-11-20 22:59:51,282 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 276 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 22:59:51,282 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 165 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 64 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2021-11-20 22:59:51,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 425 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 356 Invalid, 1 Unknown, 0 Unchecked, 4.8s Time] [2021-11-20 22:59:51,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2021-11-20 22:59:51,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 523. [2021-11-20 22:59:51,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 522 states have (on average 1.4731800766283525) internal successors, (769), 522 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:59:51,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 769 transitions. [2021-11-20 22:59:51,301 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 769 transitions. Word has length 141 [2021-11-20 22:59:51,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:59:51,302 INFO L470 AbstractCegarLoop]: Abstraction has 523 states and 769 transitions. [2021-11-20 22:59:51,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 24.166666666666668) internal successors, (145), 6 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:59:51,302 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 769 transitions. [2021-11-20 22:59:51,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-20 22:59:51,304 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:59:51,304 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-20 22:59:51,332 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-20 22:59:51,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 22:59:51,518 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:59:51,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:59:51,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1475385258, now seen corresponding path program 1 times [2021-11-20 22:59:51,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:59:51,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1442150612] [2021-11-20 22:59:51,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:59:51,519 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:59:51,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:59:51,520 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:59:51,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-20 22:59:51,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:59:51,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 22:59:51,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:59:51,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-20 22:59:52,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-20 22:59:52,269 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-20 22:59:52,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:59:52,805 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-20 22:59:52,807 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 22:59:52,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1442150612] [2021-11-20 22:59:52,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1442150612] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 22:59:52,808 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:59:52,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-20 22:59:52,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550369710] [2021-11-20 22:59:52,809 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 22:59:52,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 22:59:52,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 22:59:52,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 22:59:52,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 22:59:52,810 INFO L87 Difference]: Start difference. First operand 523 states and 769 transitions. Second operand has 6 states, 6 states have (on average 24.5) internal successors, (147), 6 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:59:54,823 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 22:59:57,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:59:57,733 INFO L93 Difference]: Finished difference Result 1145 states and 1678 transitions. [2021-11-20 22:59:57,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 22:59:57,734 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 24.5) internal successors, (147), 6 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 142 [2021-11-20 22:59:57,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:59:57,738 INFO L225 Difference]: With dead ends: 1145 [2021-11-20 22:59:57,738 INFO L226 Difference]: Without dead ends: 627 [2021-11-20 22:59:57,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 22:59:57,739 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 162 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 65 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2021-11-20 22:59:57,739 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 439 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 356 Invalid, 1 Unknown, 0 Unchecked, 4.8s Time] [2021-11-20 22:59:57,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2021-11-20 22:59:57,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 515. [2021-11-20 22:59:57,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 1.4688715953307394) internal successors, (755), 514 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:59:57,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 755 transitions. [2021-11-20 22:59:57,758 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 755 transitions. Word has length 142 [2021-11-20 22:59:57,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:59:57,758 INFO L470 AbstractCegarLoop]: Abstraction has 515 states and 755 transitions. [2021-11-20 22:59:57,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 24.5) internal successors, (147), 6 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:59:57,759 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 755 transitions. [2021-11-20 22:59:57,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-20 22:59:57,760 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:59:57,761 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:59:57,777 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (26)] Ended with exit code 0 [2021-11-20 22:59:57,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 22:59:57,974 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:59:57,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:59:57,975 INFO L85 PathProgramCache]: Analyzing trace with hash 2139825702, now seen corresponding path program 1 times [2021-11-20 22:59:57,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:59:57,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1640646524] [2021-11-20 22:59:57,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:59:57,976 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:59:57,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:59:57,976 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:59:57,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-20 22:59:58,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:59:58,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 22:59:58,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:59:58,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-20 22:59:58,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-20 22:59:58,744 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-11-20 22:59:58,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:59:59,251 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-11-20 22:59:59,251 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 22:59:59,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1640646524] [2021-11-20 22:59:59,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1640646524] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 22:59:59,252 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:59:59,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-20 22:59:59,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345528574] [2021-11-20 22:59:59,252 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 22:59:59,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 22:59:59,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 22:59:59,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 22:59:59,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 22:59:59,254 INFO L87 Difference]: Start difference. First operand 515 states and 755 transitions. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:00:01,275 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:00:04,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:00:04,681 INFO L93 Difference]: Finished difference Result 1155 states and 1691 transitions. [2021-11-20 23:00:04,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:00:04,682 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 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 144 [2021-11-20 23:00:04,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:00:04,686 INFO L225 Difference]: With dead ends: 1155 [2021-11-20 23:00:04,686 INFO L226 Difference]: Without dead ends: 661 [2021-11-20 23:00:04,686 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:00:04,687 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 151 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 60 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2021-11-20 23:00:04,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 469 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 370 Invalid, 1 Unknown, 0 Unchecked, 5.4s Time] [2021-11-20 23:00:04,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2021-11-20 23:00:04,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 541. [2021-11-20 23:00:04,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 541 states, 540 states have (on average 1.4537037037037037) internal successors, (785), 540 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:00:04,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 785 transitions. [2021-11-20 23:00:04,708 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 785 transitions. Word has length 144 [2021-11-20 23:00:04,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:00:04,709 INFO L470 AbstractCegarLoop]: Abstraction has 541 states and 785 transitions. [2021-11-20 23:00:04,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:00:04,709 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 785 transitions. [2021-11-20 23:00:04,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-20 23:00:04,711 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:00:04,711 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:00:04,724 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-20 23:00:04,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:00:04,923 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:00:04,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:00:04,923 INFO L85 PathProgramCache]: Analyzing trace with hash 998817650, now seen corresponding path program 1 times [2021-11-20 23:00:04,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:00:04,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [63405767] [2021-11-20 23:00:04,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:00:04,924 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:00:04,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:00:04,924 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:00:04,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-20 23:00:05,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:00:05,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 23:00:05,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:00:05,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-20 23:00:05,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-20 23:00:05,626 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 106 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-11-20 23:00:05,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:00:06,134 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 106 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-11-20 23:00:06,134 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:00:06,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [63405767] [2021-11-20 23:00:06,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [63405767] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:00:06,134 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:00:06,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-20 23:00:06,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572524085] [2021-11-20 23:00:06,135 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:00:06,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 23:00:06,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:00:06,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 23:00:06,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:00:06,141 INFO L87 Difference]: Start difference. First operand 541 states and 785 transitions. Second operand has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:00:08,158 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:00:10,170 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:00:14,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:00:14,282 INFO L93 Difference]: Finished difference Result 1171 states and 1697 transitions. [2021-11-20 23:00:14,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:00:14,282 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-11-20 23:00:14,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:00:14,286 INFO L225 Difference]: With dead ends: 1171 [2021-11-20 23:00:14,286 INFO L226 Difference]: Without dead ends: 651 [2021-11-20 23:00:14,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 284 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:00:14,287 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 147 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 63 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:00:14,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 571 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 466 Invalid, 2 Unknown, 0 Unchecked, 8.1s Time] [2021-11-20 23:00:14,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2021-11-20 23:00:14,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 541. [2021-11-20 23:00:14,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 541 states, 540 states have (on average 1.4351851851851851) internal successors, (775), 540 states have internal predecessors, (775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:00:14,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 775 transitions. [2021-11-20 23:00:14,315 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 775 transitions. Word has length 145 [2021-11-20 23:00:14,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:00:14,316 INFO L470 AbstractCegarLoop]: Abstraction has 541 states and 775 transitions. [2021-11-20 23:00:14,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:00:14,316 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 775 transitions. [2021-11-20 23:00:14,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-11-20 23:00:14,318 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:00:14,318 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:00:14,332 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (28)] Ended with exit code 0 [2021-11-20 23:00:14,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:00:14,532 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:00:14,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:00:14,533 INFO L85 PathProgramCache]: Analyzing trace with hash -985114799, now seen corresponding path program 1 times [2021-11-20 23:00:14,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:00:14,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [341817867] [2021-11-20 23:00:14,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:00:14,534 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:00:14,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:00:14,535 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:00:14,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-20 23:00:14,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:00:14,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 23:00:14,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:00:14,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-20 23:00:14,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-20 23:00:15,281 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 124 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-11-20 23:00:15,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:00:15,841 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 124 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-11-20 23:00:15,841 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:00:15,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [341817867] [2021-11-20 23:00:15,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [341817867] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:00:15,842 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:00:15,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-20 23:00:15,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837085371] [2021-11-20 23:00:15,842 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:00:15,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 23:00:15,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:00:15,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 23:00:15,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:00:15,844 INFO L87 Difference]: Start difference. First operand 541 states and 775 transitions. Second operand has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:00:17,864 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:00:21,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:00:21,725 INFO L93 Difference]: Finished difference Result 1205 states and 1725 transitions. [2021-11-20 23:00:21,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:00:21,726 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 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 155 [2021-11-20 23:00:21,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:00:21,729 INFO L225 Difference]: With dead ends: 1205 [2021-11-20 23:00:21,729 INFO L226 Difference]: Without dead ends: 685 [2021-11-20 23:00:21,730 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 304 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:00:21,730 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 133 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 61 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 588 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2021-11-20 23:00:21,730 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 588 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 471 Invalid, 1 Unknown, 0 Unchecked, 5.8s Time] [2021-11-20 23:00:21,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2021-11-20 23:00:21,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 574. [2021-11-20 23:00:21,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 573 states have (on average 1.425828970331588) internal successors, (817), 573 states have internal predecessors, (817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:00:21,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 817 transitions. [2021-11-20 23:00:21,753 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 817 transitions. Word has length 155 [2021-11-20 23:00:21,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:00:21,753 INFO L470 AbstractCegarLoop]: Abstraction has 574 states and 817 transitions. [2021-11-20 23:00:21,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:00:21,754 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 817 transitions. [2021-11-20 23:00:21,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-20 23:00:21,755 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:00:21,756 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:00:21,772 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2021-11-20 23:00:21,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:00:21,969 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:00:21,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:00:21,969 INFO L85 PathProgramCache]: Analyzing trace with hash 197830464, now seen corresponding path program 1 times [2021-11-20 23:00:21,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:00:21,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [789343572] [2021-11-20 23:00:21,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:00:21,970 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:00:21,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:00:21,971 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:00:21,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-20 23:00:22,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:00:22,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 23:00:22,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:00:22,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-20 23:00:22,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-20 23:00:22,711 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-11-20 23:00:22,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:00:23,261 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-11-20 23:00:23,262 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:00:23,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [789343572] [2021-11-20 23:00:23,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [789343572] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:00:23,262 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:00:23,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-20 23:00:23,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418725285] [2021-11-20 23:00:23,262 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:00:23,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 23:00:23,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:00:23,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 23:00:23,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:00:23,264 INFO L87 Difference]: Start difference. First operand 574 states and 817 transitions. Second operand has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:00:25,290 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:00:29,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:00:29,488 INFO L93 Difference]: Finished difference Result 1233 states and 1754 transitions. [2021-11-20 23:00:29,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:00:29,490 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 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 156 [2021-11-20 23:00:29,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:00:29,494 INFO L225 Difference]: With dead ends: 1233 [2021-11-20 23:00:29,494 INFO L226 Difference]: Without dead ends: 662 [2021-11-20 23:00:29,495 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 306 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:00:29,495 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 128 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 58 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 593 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:00:29,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 593 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 468 Invalid, 1 Unknown, 0 Unchecked, 6.1s Time] [2021-11-20 23:00:29,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2021-11-20 23:00:29,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 565. [2021-11-20 23:00:29,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 565 states, 564 states have (on average 1.4131205673758864) internal successors, (797), 564 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:00:29,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565 states to 565 states and 797 transitions. [2021-11-20 23:00:29,515 INFO L78 Accepts]: Start accepts. Automaton has 565 states and 797 transitions. Word has length 156 [2021-11-20 23:00:29,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:00:29,515 INFO L470 AbstractCegarLoop]: Abstraction has 565 states and 797 transitions. [2021-11-20 23:00:29,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:00:29,515 INFO L276 IsEmpty]: Start isEmpty. Operand 565 states and 797 transitions. [2021-11-20 23:00:29,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-11-20 23:00:29,517 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:00:29,517 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:00:29,535 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-20 23:00:29,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:00:29,732 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:00:29,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:00:29,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1622098304, now seen corresponding path program 1 times [2021-11-20 23:00:29,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:00:29,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1515350435] [2021-11-20 23:00:29,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:00:29,733 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:00:29,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:00:29,733 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:00:29,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-20 23:00:29,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:00:29,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 23:00:29,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:00:29,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-20 23:00:30,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-20 23:00:30,523 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-11-20 23:00:30,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:00:31,098 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-11-20 23:00:31,099 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:00:31,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1515350435] [2021-11-20 23:00:31,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1515350435] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:00:31,099 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:00:31,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-20 23:00:31,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715205541] [2021-11-20 23:00:31,099 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:00:31,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 23:00:31,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:00:31,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 23:00:31,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:00:31,100 INFO L87 Difference]: Start difference. First operand 565 states and 797 transitions. Second operand has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:00:33,111 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:00:36,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:00:36,475 INFO L93 Difference]: Finished difference Result 1231 states and 1741 transitions. [2021-11-20 23:00:36,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:00:36,478 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 0 states have call successors, (0), 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 163 [2021-11-20 23:00:36,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:00:36,481 INFO L225 Difference]: With dead ends: 1231 [2021-11-20 23:00:36,481 INFO L226 Difference]: Without dead ends: 687 [2021-11-20 23:00:36,481 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 320 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:00:36,482 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 165 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 59 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2021-11-20 23:00:36,482 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 432 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 357 Invalid, 1 Unknown, 0 Unchecked, 5.3s Time] [2021-11-20 23:00:36,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2021-11-20 23:00:36,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 587. [2021-11-20 23:00:36,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 586 states have (on average 1.39419795221843) internal successors, (817), 586 states have internal predecessors, (817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:00:36,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 817 transitions. [2021-11-20 23:00:36,506 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 817 transitions. Word has length 163 [2021-11-20 23:00:36,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:00:36,507 INFO L470 AbstractCegarLoop]: Abstraction has 587 states and 817 transitions. [2021-11-20 23:00:36,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:00:36,507 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 817 transitions. [2021-11-20 23:00:36,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-11-20 23:00:36,513 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:00:36,514 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:00:36,540 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (31)] Ended with exit code 0 [2021-11-20 23:00:36,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:00:36,730 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:00:36,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:00:36,731 INFO L85 PathProgramCache]: Analyzing trace with hash 2032394356, now seen corresponding path program 1 times [2021-11-20 23:00:36,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:00:36,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1788006458] [2021-11-20 23:00:36,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:00:36,732 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:00:36,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:00:36,732 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:00:36,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-20 23:00:36,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:00:36,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 23:00:36,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:00:36,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-20 23:00:37,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-20 23:00:37,432 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 94 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-11-20 23:00:37,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:00:37,971 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 94 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-11-20 23:00:37,971 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:00:37,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1788006458] [2021-11-20 23:00:37,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1788006458] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:00:37,972 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:00:37,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-20 23:00:37,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204680085] [2021-11-20 23:00:37,972 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:00:37,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 23:00:37,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:00:37,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 23:00:37,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:00:37,973 INFO L87 Difference]: Start difference. First operand 587 states and 817 transitions. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:00:39,986 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:00:41,997 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:00:46,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:00:46,186 INFO L93 Difference]: Finished difference Result 1246 states and 1737 transitions. [2021-11-20 23:00:46,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:00:46,189 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 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 164 [2021-11-20 23:00:46,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:00:46,192 INFO L225 Difference]: With dead ends: 1246 [2021-11-20 23:00:46,192 INFO L226 Difference]: Without dead ends: 680 [2021-11-20 23:00:46,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 322 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:00:46,193 INFO L933 BasicCegarLoop]: 139 mSDtfsCounter, 133 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 55 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 622 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:00:46,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 622 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 470 Invalid, 2 Unknown, 0 Unchecked, 8.1s Time] [2021-11-20 23:00:46,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2021-11-20 23:00:46,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 587. [2021-11-20 23:00:46,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 586 states have (on average 1.3737201365187712) internal successors, (805), 586 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:00:46,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 805 transitions. [2021-11-20 23:00:46,211 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 805 transitions. Word has length 164 [2021-11-20 23:00:46,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:00:46,211 INFO L470 AbstractCegarLoop]: Abstraction has 587 states and 805 transitions. [2021-11-20 23:00:46,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:00:46,211 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 805 transitions. [2021-11-20 23:00:46,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-11-20 23:00:46,213 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:00:46,213 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:00:46,226 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (32)] Ended with exit code 0 [2021-11-20 23:00:46,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:00:46,428 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:00:46,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:00:46,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1063655795, now seen corresponding path program 1 times [2021-11-20 23:00:46,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:00:46,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [646266296] [2021-11-20 23:00:46,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:00:46,429 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:00:46,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:00:46,430 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:00:46,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-20 23:00:46,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:00:46,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 23:00:46,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:00:46,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-20 23:00:46,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-20 23:00:47,161 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-11-20 23:00:47,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:00:47,685 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-11-20 23:00:47,686 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:00:47,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [646266296] [2021-11-20 23:00:47,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [646266296] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:00:47,686 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:00:47,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-20 23:00:47,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391603206] [2021-11-20 23:00:47,687 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:00:47,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 23:00:47,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:00:47,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 23:00:47,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:00:47,688 INFO L87 Difference]: Start difference. First operand 587 states and 805 transitions. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:00:49,701 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:00:53,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:00:53,748 INFO L93 Difference]: Finished difference Result 1271 states and 1747 transitions. [2021-11-20 23:00:53,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:00:53,751 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 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 166 [2021-11-20 23:00:53,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:00:53,753 INFO L225 Difference]: With dead ends: 1271 [2021-11-20 23:00:53,753 INFO L226 Difference]: Without dead ends: 705 [2021-11-20 23:00:53,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:00:53,754 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 129 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 55 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 593 SdHoareTripleChecker+Invalid, 526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:00:53,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 593 Invalid, 526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 470 Invalid, 1 Unknown, 0 Unchecked, 6.0s Time] [2021-11-20 23:00:53,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 705 states. [2021-11-20 23:00:53,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 705 to 611. [2021-11-20 23:00:53,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 611 states, 610 states have (on average 1.3557377049180328) internal successors, (827), 610 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:00:53,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 611 states to 611 states and 827 transitions. [2021-11-20 23:00:53,772 INFO L78 Accepts]: Start accepts. Automaton has 611 states and 827 transitions. Word has length 166 [2021-11-20 23:00:53,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:00:53,772 INFO L470 AbstractCegarLoop]: Abstraction has 611 states and 827 transitions. [2021-11-20 23:00:53,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:00:53,772 INFO L276 IsEmpty]: Start isEmpty. Operand 611 states and 827 transitions. [2021-11-20 23:00:53,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-11-20 23:00:53,773 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:00:53,774 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:00:53,788 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-11-20 23:00:53,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:00:53,987 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:00:53,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:00:53,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1586237642, now seen corresponding path program 1 times [2021-11-20 23:00:53,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:00:53,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [787643562] [2021-11-20 23:00:53,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:00:53,989 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:00:53,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:00:53,990 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:00:53,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-20 23:00:54,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:00:54,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 23:00:54,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:00:54,520 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 96 proven. 0 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-11-20 23:00:54,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:00:54,841 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 96 proven. 0 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-11-20 23:00:54,841 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:00:54,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [787643562] [2021-11-20 23:00:54,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [787643562] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:00:54,842 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:00:54,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-20 23:00:54,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843622692] [2021-11-20 23:00:54,842 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:00:54,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:00:54,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:00:54,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:00:54,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:00:54,844 INFO L87 Difference]: Start difference. First operand 611 states and 827 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:00:54,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:00:54,970 INFO L93 Difference]: Finished difference Result 1785 states and 2425 transitions. [2021-11-20 23:00:54,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:00:54,970 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 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 166 [2021-11-20 23:00:54,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:00:54,975 INFO L225 Difference]: With dead ends: 1785 [2021-11-20 23:00:54,975 INFO L226 Difference]: Without dead ends: 1195 [2021-11-20 23:00:54,976 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:00:54,977 INFO L933 BasicCegarLoop]: 367 mSDtfsCounter, 139 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:00:54,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 555 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:00:54,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1195 states. [2021-11-20 23:00:55,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1195 to 1195. [2021-11-20 23:00:55,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1195 states, 1194 states have (on average 1.3534338358458962) internal successors, (1616), 1194 states have internal predecessors, (1616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:00:55,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1195 states to 1195 states and 1616 transitions. [2021-11-20 23:00:55,024 INFO L78 Accepts]: Start accepts. Automaton has 1195 states and 1616 transitions. Word has length 166 [2021-11-20 23:00:55,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:00:55,025 INFO L470 AbstractCegarLoop]: Abstraction has 1195 states and 1616 transitions. [2021-11-20 23:00:55,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:00:55,025 INFO L276 IsEmpty]: Start isEmpty. Operand 1195 states and 1616 transitions. [2021-11-20 23:00:55,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-11-20 23:00:55,026 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:00:55,026 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:00:55,038 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-11-20 23:00:55,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:00:55,228 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:00:55,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:00:55,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1559067513, now seen corresponding path program 1 times [2021-11-20 23:00:55,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:00:55,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [353465333] [2021-11-20 23:00:55,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:00:55,229 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:00:55,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:00:55,231 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:00:55,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-11-20 23:00:55,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:00:55,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 23:00:55,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:00:55,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-20 23:00:55,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-20 23:00:55,946 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 130 proven. 0 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-11-20 23:00:55,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:00:56,481 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 130 proven. 0 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-11-20 23:00:56,482 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:00:56,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [353465333] [2021-11-20 23:00:56,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [353465333] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:00:56,482 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:00:56,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-20 23:00:56,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300243373] [2021-11-20 23:00:56,482 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:00:56,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 23:00:56,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:00:56,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 23:00:56,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:00:56,483 INFO L87 Difference]: Start difference. First operand 1195 states and 1616 transitions. Second operand has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:00:58,494 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:01:02,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:01:02,357 INFO L93 Difference]: Finished difference Result 2543 states and 3439 transitions. [2021-11-20 23:01:02,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:01:02,360 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 167 [2021-11-20 23:01:02,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:01:02,366 INFO L225 Difference]: With dead ends: 2543 [2021-11-20 23:01:02,366 INFO L226 Difference]: Without dead ends: 1353 [2021-11-20 23:01:02,367 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:01:02,368 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 135 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 59 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 560 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2021-11-20 23:01:02,368 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 560 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 456 Invalid, 1 Unknown, 0 Unchecked, 5.8s Time] [2021-11-20 23:01:02,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1353 states. [2021-11-20 23:01:02,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1353 to 1187. [2021-11-20 23:01:02,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1187 states, 1186 states have (on average 1.3322091062394603) internal successors, (1580), 1186 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:01:02,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1187 states to 1187 states and 1580 transitions. [2021-11-20 23:01:02,424 INFO L78 Accepts]: Start accepts. Automaton has 1187 states and 1580 transitions. Word has length 167 [2021-11-20 23:01:02,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:01:02,424 INFO L470 AbstractCegarLoop]: Abstraction has 1187 states and 1580 transitions. [2021-11-20 23:01:02,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:01:02,425 INFO L276 IsEmpty]: Start isEmpty. Operand 1187 states and 1580 transitions. [2021-11-20 23:01:02,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-11-20 23:01:02,426 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:01:02,426 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:01:02,447 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2021-11-20 23:01:02,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:01:02,648 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:01:02,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:01:02,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1688365398, now seen corresponding path program 1 times [2021-11-20 23:01:02,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:01:02,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1579056284] [2021-11-20 23:01:02,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:01:02,649 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:01:02,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:01:02,650 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:01:02,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-11-20 23:01:02,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:01:02,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 23:01:02,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:01:03,252 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 160 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-20 23:01:03,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:01:03,653 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 160 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-20 23:01:03,653 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:01:03,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1579056284] [2021-11-20 23:01:03,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1579056284] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:01:03,654 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:01:03,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-20 23:01:03,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29157885] [2021-11-20 23:01:03,655 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:01:03,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:01:03,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:01:03,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:01:03,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:01:03,655 INFO L87 Difference]: Start difference. First operand 1187 states and 1580 transitions. Second operand has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:01:03,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:01:03,816 INFO L93 Difference]: Finished difference Result 2898 states and 3865 transitions. [2021-11-20 23:01:03,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:01:03,817 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 167 [2021-11-20 23:01:03,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:01:03,823 INFO L225 Difference]: With dead ends: 2898 [2021-11-20 23:01:03,823 INFO L226 Difference]: Without dead ends: 1732 [2021-11-20 23:01:03,824 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 331 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:01:03,824 INFO L933 BasicCegarLoop]: 364 mSDtfsCounter, 132 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 552 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:01:03,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 552 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:01:03,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1732 states. [2021-11-20 23:01:03,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1732 to 1730. [2021-11-20 23:01:03,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1730 states, 1729 states have (on average 1.3319838056680162) internal successors, (2303), 1729 states have internal predecessors, (2303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:01:03,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1730 states to 1730 states and 2303 transitions. [2021-11-20 23:01:03,875 INFO L78 Accepts]: Start accepts. Automaton has 1730 states and 2303 transitions. Word has length 167 [2021-11-20 23:01:03,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:01:03,876 INFO L470 AbstractCegarLoop]: Abstraction has 1730 states and 2303 transitions. [2021-11-20 23:01:03,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:01:03,876 INFO L276 IsEmpty]: Start isEmpty. Operand 1730 states and 2303 transitions. [2021-11-20 23:01:03,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-11-20 23:01:03,877 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:01:03,877 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:01:03,886 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2021-11-20 23:01:04,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:01:04,078 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:01:04,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:01:04,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1983515439, now seen corresponding path program 1 times [2021-11-20 23:01:04,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:01:04,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1769981682] [2021-11-20 23:01:04,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:01:04,079 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:01:04,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:01:04,080 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:01:04,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-11-20 23:01:04,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:01:04,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 23:01:04,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:01:04,740 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 154 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-20 23:01:04,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:01:05,224 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 154 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-20 23:01:05,225 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:01:05,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1769981682] [2021-11-20 23:01:05,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1769981682] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:01:05,225 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:01:05,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-20 23:01:05,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992063308] [2021-11-20 23:01:05,226 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:01:05,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:01:05,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:01:05,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:01:05,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:01:05,227 INFO L87 Difference]: Start difference. First operand 1730 states and 2303 transitions. Second operand has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:01:05,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:01:05,359 INFO L93 Difference]: Finished difference Result 3975 states and 5304 transitions. [2021-11-20 23:01:05,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:01:05,360 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 0 states have call successors, (0), 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 168 [2021-11-20 23:01:05,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:01:05,368 INFO L225 Difference]: With dead ends: 3975 [2021-11-20 23:01:05,368 INFO L226 Difference]: Without dead ends: 2266 [2021-11-20 23:01:05,369 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 333 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:01:05,370 INFO L933 BasicCegarLoop]: 248 mSDtfsCounter, 134 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:01:05,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 436 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:01:05,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2266 states. [2021-11-20 23:01:05,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2266 to 2244. [2021-11-20 23:01:05,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2244 states, 2243 states have (on average 1.3370485956308515) internal successors, (2999), 2243 states have internal predecessors, (2999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:01:05,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2244 states to 2244 states and 2999 transitions. [2021-11-20 23:01:05,450 INFO L78 Accepts]: Start accepts. Automaton has 2244 states and 2999 transitions. Word has length 168 [2021-11-20 23:01:05,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:01:05,450 INFO L470 AbstractCegarLoop]: Abstraction has 2244 states and 2999 transitions. [2021-11-20 23:01:05,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:01:05,451 INFO L276 IsEmpty]: Start isEmpty. Operand 2244 states and 2999 transitions. [2021-11-20 23:01:05,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-11-20 23:01:05,453 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:01:05,453 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:01:05,467 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2021-11-20 23:01:05,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:01:05,666 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:01:05,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:01:05,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1876946259, now seen corresponding path program 1 times [2021-11-20 23:01:05,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:01:05,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1390685119] [2021-11-20 23:01:05,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:01:05,668 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:01:05,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:01:05,668 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:01:05,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-11-20 23:01:05,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:01:05,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 23:01:05,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:01:06,312 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-11-20 23:01:06,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:01:06,787 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-11-20 23:01:06,788 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:01:06,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1390685119] [2021-11-20 23:01:06,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1390685119] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:01:06,788 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:01:06,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-20 23:01:06,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181375113] [2021-11-20 23:01:06,788 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:01:06,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:01:06,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:01:06,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:01:06,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:01:06,790 INFO L87 Difference]: Start difference. First operand 2244 states and 2999 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:01:06,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:01:06,918 INFO L93 Difference]: Finished difference Result 4516 states and 6041 transitions. [2021-11-20 23:01:06,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:01:06,919 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 168 [2021-11-20 23:01:06,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:01:06,929 INFO L225 Difference]: With dead ends: 4516 [2021-11-20 23:01:06,929 INFO L226 Difference]: Without dead ends: 2293 [2021-11-20 23:01:06,931 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 333 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:01:06,932 INFO L933 BasicCegarLoop]: 233 mSDtfsCounter, 17 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:01:06,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 421 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:01:06,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2293 states. [2021-11-20 23:01:07,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2293 to 2293. [2021-11-20 23:01:07,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2293 states, 2292 states have (on average 1.337260034904014) internal successors, (3065), 2292 states have internal predecessors, (3065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:01:07,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2293 states to 2293 states and 3065 transitions. [2021-11-20 23:01:07,022 INFO L78 Accepts]: Start accepts. Automaton has 2293 states and 3065 transitions. Word has length 168 [2021-11-20 23:01:07,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:01:07,022 INFO L470 AbstractCegarLoop]: Abstraction has 2293 states and 3065 transitions. [2021-11-20 23:01:07,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:01:07,023 INFO L276 IsEmpty]: Start isEmpty. Operand 2293 states and 3065 transitions. [2021-11-20 23:01:07,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-11-20 23:01:07,025 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:01:07,025 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:01:07,034 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2021-11-20 23:01:07,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:01:07,226 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:01:07,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:01:07,226 INFO L85 PathProgramCache]: Analyzing trace with hash -486895403, now seen corresponding path program 1 times [2021-11-20 23:01:07,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:01:07,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [553685595] [2021-11-20 23:01:07,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:01:07,227 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:01:07,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:01:07,228 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:01:07,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2021-11-20 23:01:07,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:01:07,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 23:01:07,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:01:07,981 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-11-20 23:01:07,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:01:08,513 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-11-20 23:01:08,513 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:01:08,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [553685595] [2021-11-20 23:01:08,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [553685595] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:01:08,514 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:01:08,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-20 23:01:08,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958635214] [2021-11-20 23:01:08,514 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:01:08,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:01:08,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:01:08,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:01:08,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:01:08,516 INFO L87 Difference]: Start difference. First operand 2293 states and 3065 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 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) [2021-11-20 23:01:08,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:01:08,607 INFO L93 Difference]: Finished difference Result 4589 states and 6138 transitions. [2021-11-20 23:01:08,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:01:08,607 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 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 168 [2021-11-20 23:01:08,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:01:08,619 INFO L225 Difference]: With dead ends: 4589 [2021-11-20 23:01:08,620 INFO L226 Difference]: Without dead ends: 2317 [2021-11-20 23:01:08,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 333 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:01:08,622 INFO L933 BasicCegarLoop]: 202 mSDtfsCounter, 23 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:01:08,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 381 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 23:01:08,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2317 states. [2021-11-20 23:01:08,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2317 to 2317. [2021-11-20 23:01:08,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2317 states, 2316 states have (on average 1.3372193436960276) internal successors, (3097), 2316 states have internal predecessors, (3097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:01:08,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2317 states to 2317 states and 3097 transitions. [2021-11-20 23:01:08,717 INFO L78 Accepts]: Start accepts. Automaton has 2317 states and 3097 transitions. Word has length 168 [2021-11-20 23:01:08,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:01:08,717 INFO L470 AbstractCegarLoop]: Abstraction has 2317 states and 3097 transitions. [2021-11-20 23:01:08,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 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) [2021-11-20 23:01:08,718 INFO L276 IsEmpty]: Start isEmpty. Operand 2317 states and 3097 transitions. [2021-11-20 23:01:08,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-11-20 23:01:08,720 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:01:08,720 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:01:08,734 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2021-11-20 23:01:08,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:01:08,920 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:01:08,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:01:08,921 INFO L85 PathProgramCache]: Analyzing trace with hash 990845040, now seen corresponding path program 1 times [2021-11-20 23:01:08,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:01:08,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1495814136] [2021-11-20 23:01:08,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:01:08,922 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:01:08,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:01:08,923 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:01:08,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2021-11-20 23:01:10,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:01:10,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-20 23:01:10,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:01:10,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:01:10,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:01:10,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:01:10,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:01:10,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:01:10,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:01:10,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:01:10,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:01:10,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:01:10,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:01:10,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 1656 treesize of output 1653 [2021-11-20 23:01:10,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:01:10,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:01:10,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:01:10,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:01:10,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:01:10,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:01:10,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:01:10,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:01:10,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:01:10,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:01:10,862 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 23:01:10,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1698 treesize of output 1637 [2021-11-20 23:01:10,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:01:10,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:01:10,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:01:10,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:01:10,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:01:10,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:57,996 WARN L227 SmtUtils]: Spent 1.79m on a formula simplification. DAG size of input: 151 DAG size of output: 86 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-20 23:02:57,998 INFO L354 Elim1Store]: treesize reduction 780, result has 32.2 percent of original size [2021-11-20 23:02:57,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 9 new quantified variables, introduced 16 case distinctions, treesize of input 1788 treesize of output 1873 [2021-11-20 23:02:58,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:58,041 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 23:02:58,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 2745 treesize of output 2439 [2021-11-20 23:02:59,633 INFO L354 Elim1Store]: treesize reduction 483, result has 9.4 percent of original size [2021-11-20 23:02:59,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 2485 treesize of output 2477 [2021-11-20 23:02:59,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:02:59,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:03:10,886 WARN L227 SmtUtils]: Spent 11.13s on a formula simplification. DAG size of input: 205 DAG size of output: 61 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-20 23:03:10,886 INFO L354 Elim1Store]: treesize reduction 1610, result has 7.4 percent of original size [2021-11-20 23:03:10,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 13 new quantified variables, introduced 19 case distinctions, treesize of input 4510 treesize of output 3240 [2021-11-20 23:03:11,030 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:03:11,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1495814136] [2021-11-20 23:03:11,031 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Some non-self update cases but no top-level DER relation [2021-11-20 23:03:11,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [813035649] [2021-11-20 23:03:11,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:03:11,031 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-20 23:03:11,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-20 23:03:11,037 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-20 23:03:11,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2021-11-20 23:03:30,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:03:30,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 79 conjunts are in the unsatisfiable core [2021-11-20 23:03:30,310 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@37fef928 [2021-11-20 23:03:30,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432479597] [2021-11-20 23:03:30,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:03:30,311 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:03:30,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:03:30,312 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:03:30,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-11-20 23:03:30,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:03:30,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 66 conjunts are in the unsatisfiable core [2021-11-20 23:03:30,838 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@37fef928 [2021-11-20 23:03:30,839 INFO L186 FreeRefinementEngine]: Found 0 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:03:30,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-11-20 23:03:30,839 ERROR L172 FreeRefinementEngine]: Strategy WALRUS failed to provide any proof altough trace is infeasible [2021-11-20 23:03:30,839 INFO L628 BasicCegarLoop]: Counterexample might be feasible [2021-11-20 23:03:30,846 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-20 23:03:30,865 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2021-11-20 23:03:31,083 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (41)] Forceful destruction successful, exit code 0 [2021-11-20 23:03:31,315 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-11-20 23:03:31,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:03:31,467 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:03:31,475 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-20 23:03:31,550 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 11:03:31 BoogieIcfgContainer [2021-11-20 23:03:31,550 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-20 23:03:31,551 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-20 23:03:31,551 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-20 23:03:31,551 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-20 23:03:31,552 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:56:44" (3/4) ... [2021-11-20 23:03:31,554 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-20 23:03:31,554 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-20 23:03:31,554 INFO L158 Benchmark]: Toolchain (without parser) took 412245.38ms. Allocated memory was 54.5MB in the beginning and 172.0MB in the end (delta: 117.4MB). Free memory was 29.9MB in the beginning and 104.9MB in the end (delta: -75.0MB). Peak memory consumption was 43.2MB. Max. memory is 16.1GB. [2021-11-20 23:03:31,554 INFO L158 Benchmark]: CDTParser took 0.25ms. Allocated memory is still 54.5MB. Free memory was 35.3MB in the beginning and 35.3MB in the end (delta: 44.5kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 23:03:31,554 INFO L158 Benchmark]: CACSL2BoogieTranslator took 830.49ms. Allocated memory was 54.5MB in the beginning and 73.4MB in the end (delta: 18.9MB). Free memory was 29.6MB in the beginning and 49.5MB in the end (delta: -19.9MB). Peak memory consumption was 16.9MB. Max. memory is 16.1GB. [2021-11-20 23:03:31,555 INFO L158 Benchmark]: Boogie Procedure Inliner took 135.30ms. Allocated memory is still 73.4MB. Free memory was 49.5MB in the beginning and 44.8MB in the end (delta: 4.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-20 23:03:31,555 INFO L158 Benchmark]: Boogie Preprocessor took 91.24ms. Allocated memory is still 73.4MB. Free memory was 44.8MB in the beginning and 37.6MB in the end (delta: 7.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-20 23:03:31,555 INFO L158 Benchmark]: RCFGBuilder took 4449.69ms. Allocated memory was 73.4MB in the beginning and 102.8MB in the end (delta: 29.4MB). Free memory was 37.6MB in the beginning and 72.4MB in the end (delta: -34.8MB). Peak memory consumption was 19.8MB. Max. memory is 16.1GB. [2021-11-20 23:03:31,555 INFO L158 Benchmark]: TraceAbstraction took 406726.96ms. Allocated memory was 102.8MB in the beginning and 172.0MB in the end (delta: 69.2MB). Free memory was 71.8MB in the beginning and 105.9MB in the end (delta: -34.1MB). Peak memory consumption was 34.8MB. Max. memory is 16.1GB. [2021-11-20 23:03:31,555 INFO L158 Benchmark]: Witness Printer took 2.97ms. Allocated memory is still 172.0MB. Free memory was 105.9MB in the beginning and 104.9MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-20 23:03:31,556 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25ms. Allocated memory is still 54.5MB. Free memory was 35.3MB in the beginning and 35.3MB in the end (delta: 44.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 830.49ms. Allocated memory was 54.5MB in the beginning and 73.4MB in the end (delta: 18.9MB). Free memory was 29.6MB in the beginning and 49.5MB in the end (delta: -19.9MB). Peak memory consumption was 16.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 135.30ms. Allocated memory is still 73.4MB. Free memory was 49.5MB in the beginning and 44.8MB in the end (delta: 4.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 91.24ms. Allocated memory is still 73.4MB. Free memory was 44.8MB in the beginning and 37.6MB in the end (delta: 7.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * RCFGBuilder took 4449.69ms. Allocated memory was 73.4MB in the beginning and 102.8MB in the end (delta: 29.4MB). Free memory was 37.6MB in the beginning and 72.4MB in the end (delta: -34.8MB). Peak memory consumption was 19.8MB. Max. memory is 16.1GB. * TraceAbstraction took 406726.96ms. Allocated memory was 102.8MB in the beginning and 172.0MB in the end (delta: 69.2MB). Free memory was 71.8MB in the beginning and 105.9MB in the end (delta: -34.1MB). Peak memory consumption was 34.8MB. Max. memory is 16.1GB. * Witness Printer took 2.97ms. Allocated memory is still 172.0MB. Free memory was 105.9MB in the beginning and 104.9MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 1742]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L1054] static int init = 1; [L1055] static SSL_METHOD SSLv3_server_data ; [L1077] SSL *s ; [L1078] int tmp ; [L1082] s = malloc(sizeof(SSL)) [L1083] s->s3 = malloc(sizeof(struct ssl3_state_st)) [L1084] s->ctx = malloc(sizeof(SSL_CTX)) [L1085] s->session = malloc(sizeof(SSL_SESSION)) [L1087] s->info_callback = (void (*) ()) __VERIFIER_nondet_ulong() [L1088] s->options = __VERIFIER_nondet_ulong() [L1089] s->verify_mode = __VERIFIER_nondet_int() [L1090] EXPR s->session [L1090] (s->session)->peer = (struct x509_st*) __VERIFIER_nondet_ulong() [L1091] EXPR s->s3 [L1091] (s->s3)->tmp.cert_request = __VERIFIER_nondet_int() [L1092] EXPR s->s3 [L1092] (s->s3)->tmp.new_cipher = malloc(sizeof(struct ssl_cipher_st)) [L1093] EXPR s->s3 [L1093] EXPR (s->s3)->tmp.new_cipher [L1093] ((s->s3)->tmp.new_cipher)->algorithms = __VERIFIER_nondet_ulong() [L1094] EXPR s->s3 [L1094] EXPR (s->s3)->tmp.new_cipher [L1094] ((s->s3)->tmp.new_cipher)->algo_strength = __VERIFIER_nondet_ulong() [L1095] COND FALSE !(__VERIFIER_nondet_int()) [L1101] s->cert = malloc(sizeof(struct cert_st)) [L1102] EXPR s->cert [L1102] (s->cert)->pkeys[0].privatekey = (struct evp_pkey_st*) __VERIFIER_nondet_ulong() [L1105] CALL ssl3_accept(s) [L1111] BUF_MEM *buf ; [L1112] unsigned long l ; [L1113] unsigned long Time ; [L1114] unsigned long tmp ; [L1115] void (*cb)() ; [L1116] long num1 ; [L1117] int ret ; [L1118] int new_state ; [L1119] int state ; [L1120] int skip ; [L1121] int got_new_session ; [L1122] int tmp___1 = __VERIFIER_nondet_int() ; [L1123] int tmp___2 = __VERIFIER_nondet_int() ; [L1124] int tmp___3 = __VERIFIER_nondet_int() ; [L1125] int tmp___4 = __VERIFIER_nondet_int() ; [L1126] int tmp___5 = __VERIFIER_nondet_int() ; [L1127] int tmp___6 = __VERIFIER_nondet_int() ; [L1128] int tmp___7 ; [L1129] long tmp___8 = __VERIFIER_nondet_long() ; [L1130] int tmp___9 = __VERIFIER_nondet_int() ; [L1131] int tmp___10 = __VERIFIER_nondet_int() ; [L1132] int blastFlag ; [L1136] s->state = 8464 [L1137] blastFlag = 0 [L1138] s->hit=__VERIFIER_nondet_int () [L1139] s->state = 8464 [L1140] tmp = __VERIFIER_nondet_int() [L1141] Time = tmp [L1142] cb = (void (*)())((void *)0) [L1143] ret = -1 [L1144] skip = 0 [L1145] got_new_session = 0 [L1146] EXPR s->info_callback [L1146] COND TRUE (unsigned long )s->info_callback != (unsigned long )((void *)0) [L1147] EXPR s->info_callback [L1147] cb = s->info_callback [L1151] EXPR s->in_handshake [L1151] s->in_handshake += 1 [L1152] COND FALSE !(tmp___1 & 12288) [L1161] EXPR s->cert [L1161] COND FALSE !((unsigned long )s->cert == (unsigned long )((void *)0)) [L1167] COND TRUE 1 [L1169] EXPR s->state [L1169] state = s->state [L1170] EXPR s->state [L1170] COND FALSE !(s->state == 12292) [L1173] EXPR s->state [L1173] COND FALSE !(s->state == 16384) [L1176] EXPR s->state [L1176] COND FALSE !(s->state == 8192) [L1179] EXPR s->state [L1179] COND FALSE !(s->state == 24576) [L1182] EXPR s->state [L1182] COND FALSE !(s->state == 8195) [L1185] EXPR s->state [L1185] COND FALSE !(s->state == 8480) [L1188] EXPR s->state [L1188] COND FALSE !(s->state == 8481) [L1191] EXPR s->state [L1191] COND FALSE !(s->state == 8482) [L1194] EXPR s->state [L1194] COND TRUE s->state == 8464 [L1354] s->shutdown = 0 [L1355] ret = __VERIFIER_nondet_int() [L1356] COND TRUE blastFlag == 0 [L1357] blastFlag = 1 [L1361] COND FALSE !(ret <= 0) [L1366] got_new_session = 1 [L1367] s->state = 8496 [L1368] s->init_num = 0 [L1701] EXPR s->s3 [L1701] EXPR (s->s3)->tmp.reuse_message [L1701] COND FALSE !(! (s->s3)->tmp.reuse_message) [L1730] skip = 0 [L1167] COND TRUE 1 [L1169] EXPR s->state [L1169] state = s->state [L1170] EXPR s->state [L1170] COND FALSE !(s->state == 12292) [L1173] EXPR s->state [L1173] COND FALSE !(s->state == 16384) [L1176] EXPR s->state [L1176] COND FALSE !(s->state == 8192) [L1179] EXPR s->state [L1179] COND FALSE !(s->state == 24576) [L1182] EXPR s->state [L1182] COND FALSE !(s->state == 8195) [L1185] EXPR s->state [L1185] COND FALSE !(s->state == 8480) [L1188] EXPR s->state [L1188] COND FALSE !(s->state == 8481) [L1191] EXPR s->state [L1191] COND FALSE !(s->state == 8482) [L1194] EXPR s->state [L1194] COND FALSE !(s->state == 8464) [L1197] EXPR s->state [L1197] COND FALSE !(s->state == 8465) [L1200] EXPR s->state [L1200] COND FALSE !(s->state == 8466) [L1203] EXPR s->state [L1203] COND TRUE s->state == 8496 [L1372] ret = __VERIFIER_nondet_int() [L1373] COND TRUE blastFlag == 1 [L1374] blastFlag = 2 [L1378] COND FALSE !(ret <= 0) [L1383] s->hit [L1383] COND FALSE !(s->hit) [L1386] s->state = 8512 [L1388] s->init_num = 0 [L1701] EXPR s->s3 [L1701] EXPR (s->s3)->tmp.reuse_message [L1701] COND FALSE !(! (s->s3)->tmp.reuse_message) [L1730] skip = 0 [L1167] COND TRUE 1 [L1169] EXPR s->state [L1169] state = s->state [L1170] EXPR s->state [L1170] COND FALSE !(s->state == 12292) [L1173] EXPR s->state [L1173] COND FALSE !(s->state == 16384) [L1176] EXPR s->state [L1176] COND FALSE !(s->state == 8192) [L1179] EXPR s->state [L1179] COND FALSE !(s->state == 24576) [L1182] EXPR s->state [L1182] COND FALSE !(s->state == 8195) [L1185] EXPR s->state [L1185] COND FALSE !(s->state == 8480) [L1188] EXPR s->state [L1188] COND FALSE !(s->state == 8481) [L1191] EXPR s->state [L1191] COND FALSE !(s->state == 8482) [L1194] EXPR s->state [L1194] COND FALSE !(s->state == 8464) [L1197] EXPR s->state [L1197] COND FALSE !(s->state == 8465) [L1200] EXPR s->state [L1200] COND FALSE !(s->state == 8466) [L1203] EXPR s->state [L1203] COND FALSE !(s->state == 8496) [L1206] EXPR s->state [L1206] COND FALSE !(s->state == 8497) [L1209] EXPR s->state [L1209] COND TRUE s->state == 8512 [L1392] EXPR s->s3 [L1392] EXPR (s->s3)->tmp.new_cipher [L1392] EXPR ((s->s3)->tmp.new_cipher)->algorithms [L1392] COND TRUE ((s->s3)->tmp.new_cipher)->algorithms & 256UL [L1393] skip = 1 [L1402] s->state = 8528 [L1403] s->init_num = 0 [L1701] EXPR s->s3 [L1701] EXPR (s->s3)->tmp.reuse_message [L1701] COND FALSE !(! (s->s3)->tmp.reuse_message) [L1730] skip = 0 [L1167] COND TRUE 1 [L1169] EXPR s->state [L1169] state = s->state [L1170] EXPR s->state [L1170] COND FALSE !(s->state == 12292) [L1173] EXPR s->state [L1173] COND FALSE !(s->state == 16384) [L1176] EXPR s->state [L1176] COND FALSE !(s->state == 8192) [L1179] EXPR s->state [L1179] COND FALSE !(s->state == 24576) [L1182] EXPR s->state [L1182] COND FALSE !(s->state == 8195) [L1185] EXPR s->state [L1185] COND FALSE !(s->state == 8480) [L1188] EXPR s->state [L1188] COND FALSE !(s->state == 8481) [L1191] EXPR s->state [L1191] COND FALSE !(s->state == 8482) [L1194] EXPR s->state [L1194] COND FALSE !(s->state == 8464) [L1197] EXPR s->state [L1197] COND FALSE !(s->state == 8465) [L1200] EXPR s->state [L1200] COND FALSE !(s->state == 8466) [L1203] EXPR s->state [L1203] COND FALSE !(s->state == 8496) [L1206] EXPR s->state [L1206] COND FALSE !(s->state == 8497) [L1209] EXPR s->state [L1209] COND FALSE !(s->state == 8512) [L1212] EXPR s->state [L1212] COND FALSE !(s->state == 8513) [L1215] EXPR s->state [L1215] COND TRUE s->state == 8528 [L1407] EXPR s->s3 [L1407] EXPR (s->s3)->tmp.new_cipher [L1407] EXPR ((s->s3)->tmp.new_cipher)->algorithms [L1407] l = ((s->s3)->tmp.new_cipher)->algorithms [L1408] EXPR s->options [L1408] COND TRUE s->options & 2097152UL [L1409] EXPR s->s3 [L1409] (s->s3)->tmp.use_rsa_tmp = 1 [L1413] EXPR s->s3 [L1413] (s->s3)->tmp.use_rsa_tmp [L1413] COND TRUE (s->s3)->tmp.use_rsa_tmp [L1431] ret = __VERIFIER_nondet_int() [L1432] COND FALSE !(ret <= 0) [L1449] s->state = 8544 [L1450] s->init_num = 0 [L1701] EXPR s->s3 [L1701] EXPR (s->s3)->tmp.reuse_message [L1701] COND FALSE !(! (s->s3)->tmp.reuse_message) [L1730] skip = 0 [L1167] COND TRUE 1 [L1169] EXPR s->state [L1169] state = s->state [L1170] EXPR s->state [L1170] COND FALSE !(s->state == 12292) [L1173] EXPR s->state [L1173] COND FALSE !(s->state == 16384) [L1176] EXPR s->state [L1176] COND FALSE !(s->state == 8192) [L1179] EXPR s->state [L1179] COND FALSE !(s->state == 24576) [L1182] EXPR s->state [L1182] COND FALSE !(s->state == 8195) [L1185] EXPR s->state [L1185] COND FALSE !(s->state == 8480) [L1188] EXPR s->state [L1188] COND FALSE !(s->state == 8481) [L1191] EXPR s->state [L1191] COND FALSE !(s->state == 8482) [L1194] EXPR s->state [L1194] COND FALSE !(s->state == 8464) [L1197] EXPR s->state [L1197] COND FALSE !(s->state == 8465) [L1200] EXPR s->state [L1200] COND FALSE !(s->state == 8466) [L1203] EXPR s->state [L1203] COND FALSE !(s->state == 8496) [L1206] EXPR s->state [L1206] COND FALSE !(s->state == 8497) [L1209] EXPR s->state [L1209] COND FALSE !(s->state == 8512) [L1212] EXPR s->state [L1212] COND FALSE !(s->state == 8513) [L1215] EXPR s->state [L1215] COND FALSE !(s->state == 8528) [L1218] EXPR s->state [L1218] COND FALSE !(s->state == 8529) [L1221] EXPR s->state [L1221] COND TRUE s->state == 8544 [L1454] EXPR s->verify_mode [L1454] COND TRUE s->verify_mode & 1 [L1455] EXPR s->session [L1455] EXPR (s->session)->peer [L1455] COND FALSE !((unsigned long )(s->session)->peer != (unsigned long )((void *)0)) [L1465] EXPR s->s3 [L1465] EXPR (s->s3)->tmp.new_cipher [L1465] EXPR ((s->s3)->tmp.new_cipher)->algorithms [L1465] COND FALSE !(((s->s3)->tmp.new_cipher)->algorithms & 256UL) [L1475] EXPR s->s3 [L1475] (s->s3)->tmp.cert_request = 1 [L1476] ret = __VERIFIER_nondet_int() [L1477] COND FALSE !(ret <= 0) [L1482] s->state = 8448 [L1483] EXPR s->s3 [L1483] (s->s3)->tmp.next_state = 8576 [L1484] s->init_num = 0 [L1701] EXPR s->s3 [L1701] EXPR (s->s3)->tmp.reuse_message [L1701] COND FALSE !(! (s->s3)->tmp.reuse_message) [L1730] skip = 0 [L1167] COND TRUE 1 [L1169] EXPR s->state [L1169] state = s->state [L1170] EXPR s->state [L1170] COND FALSE !(s->state == 12292) [L1173] EXPR s->state [L1173] COND FALSE !(s->state == 16384) [L1176] EXPR s->state [L1176] COND FALSE !(s->state == 8192) [L1179] EXPR s->state [L1179] COND FALSE !(s->state == 24576) [L1182] EXPR s->state [L1182] COND FALSE !(s->state == 8195) [L1185] EXPR s->state [L1185] COND FALSE !(s->state == 8480) [L1188] EXPR s->state [L1188] COND FALSE !(s->state == 8481) [L1191] EXPR s->state [L1191] COND FALSE !(s->state == 8482) [L1194] EXPR s->state [L1194] COND FALSE !(s->state == 8464) [L1197] EXPR s->state [L1197] COND FALSE !(s->state == 8465) [L1200] EXPR s->state [L1200] COND FALSE !(s->state == 8466) [L1203] EXPR s->state [L1203] COND FALSE !(s->state == 8496) [L1206] EXPR s->state [L1206] COND FALSE !(s->state == 8497) [L1209] EXPR s->state [L1209] COND FALSE !(s->state == 8512) [L1212] EXPR s->state [L1212] COND FALSE !(s->state == 8513) [L1215] EXPR s->state [L1215] COND FALSE !(s->state == 8528) [L1218] EXPR s->state [L1218] COND FALSE !(s->state == 8529) [L1221] EXPR s->state [L1221] COND FALSE !(s->state == 8544) [L1224] EXPR s->state [L1224] COND FALSE !(s->state == 8545) [L1227] EXPR s->state [L1227] COND FALSE !(s->state == 8560) [L1230] EXPR s->state [L1230] COND FALSE !(s->state == 8561) [L1233] EXPR s->state [L1233] COND TRUE s->state == 8448 [L1506] COND FALSE !(num1 > 0L) [L1519] EXPR s->s3 [L1519] EXPR (s->s3)->tmp.next_state [L1519] s->state = (s->s3)->tmp.next_state [L1701] EXPR s->s3 [L1701] EXPR (s->s3)->tmp.reuse_message [L1701] COND FALSE !(! (s->s3)->tmp.reuse_message) [L1730] skip = 0 [L1167] COND TRUE 1 [L1169] EXPR s->state [L1169] state = s->state [L1170] EXPR s->state [L1170] COND FALSE !(s->state == 12292) [L1173] EXPR s->state [L1173] COND FALSE !(s->state == 16384) [L1176] EXPR s->state [L1176] COND FALSE !(s->state == 8192) [L1179] EXPR s->state [L1179] COND FALSE !(s->state == 24576) [L1182] EXPR s->state [L1182] COND FALSE !(s->state == 8195) [L1185] EXPR s->state [L1185] COND FALSE !(s->state == 8480) [L1188] EXPR s->state [L1188] COND FALSE !(s->state == 8481) [L1191] EXPR s->state [L1191] COND FALSE !(s->state == 8482) [L1194] EXPR s->state [L1194] COND FALSE !(s->state == 8464) [L1197] EXPR s->state [L1197] COND FALSE !(s->state == 8465) [L1200] EXPR s->state [L1200] COND FALSE !(s->state == 8466) [L1203] EXPR s->state [L1203] COND FALSE !(s->state == 8496) [L1206] EXPR s->state [L1206] COND FALSE !(s->state == 8497) [L1209] EXPR s->state [L1209] COND FALSE !(s->state == 8512) [L1212] EXPR s->state [L1212] COND FALSE !(s->state == 8513) [L1215] EXPR s->state [L1215] COND FALSE !(s->state == 8528) [L1218] EXPR s->state [L1218] COND FALSE !(s->state == 8529) [L1221] EXPR s->state [L1221] COND FALSE !(s->state == 8544) [L1224] EXPR s->state [L1224] COND FALSE !(s->state == 8545) [L1227] EXPR s->state [L1227] COND FALSE !(s->state == 8560) [L1230] EXPR s->state [L1230] COND FALSE !(s->state == 8561) [L1233] EXPR s->state [L1233] COND FALSE !(s->state == 8448) [L1236] EXPR s->state [L1236] COND FALSE !(s->state == 8576) [L1239] EXPR s->state [L1239] COND FALSE !(s->state == 8577) [L1242] EXPR s->state [L1242] COND FALSE !(s->state == 8592) [L1245] EXPR s->state [L1245] COND FALSE !(s->state == 8593) [L1248] EXPR s->state [L1248] COND FALSE !(s->state == 8608) [L1251] EXPR s->state [L1251] COND FALSE !(s->state == 8609) [L1254] EXPR s->state [L1254] COND TRUE s->state == 8640 [L1566] ret = __VERIFIER_nondet_int() [L1567] COND FALSE !(blastFlag == 4) [L1742] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 147 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 406.6s, OverallIterations: 39, TraceHistogramMax: 7, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.1s, AutomataDifference: 211.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 43 mSolverCounterUnknown, 5732 SdHoareTripleChecker+Valid, 208.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 5732 mSDsluCounter, 20275 SdHoareTripleChecker+Invalid, 196.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 64 IncrementalHoareTripleChecker+Unchecked, 14256 mSDsCounter, 2070 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 13528 IncrementalHoareTripleChecker+Invalid, 15705 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2070 mSolverCounterUnsat, 6019 mSDtfsCounter, 13528 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 8904 GetRequests, 8696 SyntacticMatches, 9 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 3.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2317occurred in iteration=38, InterpolantAutomatonStates: 209, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.0s AutomataMinimizationTime, 38 MinimizatonAttempts, 3785 StatesRemovedByMinimization, 34 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.3s SsaConstructionTime, 6.7s SatisfiabilityAnalysisTime, 155.5s InterpolantComputationTime, 4649 NumberOfCodeBlocks, 4649 NumberOfCodeBlocksAsserted, 39 NumberOfCheckSat, 8840 ConstructedInterpolants, 1 QuantifiedInterpolants, 22000 SizeOfPredicates, 108 NumberOfNonLiveVariables, 12261 ConjunctsInSsa, 180 ConjunctsInUnsatCore, 76 InterpolantComputations, 76 PerfectInterpolantSequences, 8602/8602 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-11-20 23:03:31,697 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_345c5d9f-2421-4b73-8cb9-a3e5a55a8a38/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN