./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/openssl/s3_srvr.blast.13.i.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/openssl/s3_srvr.blast.13.i.cil-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 58a6b373d05d29cc87bb425c83b649cc4007a71cb802ce7ef5b6914b7a7817df --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 03:16:30,233 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 03:16:30,235 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 03:16:30,284 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 03:16:30,284 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 03:16:30,285 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 03:16:30,286 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 03:16:30,287 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 03:16:30,288 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 03:16:30,288 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 03:16:30,289 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 03:16:30,289 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 03:16:30,291 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 03:16:30,292 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 03:16:30,293 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 03:16:30,293 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 03:16:30,294 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 03:16:30,294 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 03:16:30,295 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 03:16:30,297 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 03:16:30,298 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 03:16:30,298 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 03:16:30,299 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 03:16:30,300 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 03:16:30,302 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 03:16:30,302 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 03:16:30,302 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 03:16:30,303 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 03:16:30,303 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 03:16:30,304 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 03:16:30,304 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 03:16:30,304 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 03:16:30,305 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 03:16:30,305 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 03:16:30,306 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 03:16:30,306 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 03:16:30,306 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 03:16:30,307 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 03:16:30,307 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 03:16:30,307 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 03:16:30,308 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 03:16:30,309 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 03:16:30,332 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 03:16:30,333 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 03:16:30,334 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 03:16:30,335 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 03:16:30,335 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 03:16:30,336 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 03:16:30,336 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 03:16:30,336 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 03:16:30,336 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 03:16:30,336 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 03:16:30,337 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 03:16:30,337 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 03:16:30,337 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 03:16:30,337 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 03:16:30,337 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 03:16:30,337 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 03:16:30,338 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 03:16:30,338 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 03:16:30,338 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 03:16:30,338 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 03:16:30,338 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 03:16:30,338 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 03:16:30,338 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 03:16:30,338 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 03:16:30,339 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 03:16:30,339 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 03:16:30,339 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 03:16:30,340 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 03:16:30,340 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 03:16:30,340 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 03:16:30,341 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 03:16:30,341 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 03:16:30,341 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 03:16:30,341 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 03:16:30,341 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 58a6b373d05d29cc87bb425c83b649cc4007a71cb802ce7ef5b6914b7a7817df [2021-12-17 03:16:30,523 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 03:16:30,541 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 03:16:30,542 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 03:16:30,543 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 03:16:30,545 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 03:16:30,545 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/openssl/s3_srvr.blast.13.i.cil-1.c [2021-12-17 03:16:30,607 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3488b7ef3/fc0c196b44224ef2bba1cbeb7be91f4e/FLAG30dbd71c6 [2021-12-17 03:16:31,083 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 03:16:31,084 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/openssl/s3_srvr.blast.13.i.cil-1.c [2021-12-17 03:16:31,122 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3488b7ef3/fc0c196b44224ef2bba1cbeb7be91f4e/FLAG30dbd71c6 [2021-12-17 03:16:31,627 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3488b7ef3/fc0c196b44224ef2bba1cbeb7be91f4e [2021-12-17 03:16:31,629 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 03:16:31,632 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 03:16:31,634 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 03:16:31,634 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 03:16:31,636 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 03:16:31,636 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 03:16:31" (1/1) ... [2021-12-17 03:16:31,638 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e3f960c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:16:31, skipping insertion in model container [2021-12-17 03:16:31,638 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 03:16:31" (1/1) ... [2021-12-17 03:16:31,642 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 03:16:31,693 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 03:16:32,039 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/openssl/s3_srvr.blast.13.i.cil-1.c[74354,74367] [2021-12-17 03:16:32,050 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 03:16:32,065 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 03:16:32,177 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/openssl/s3_srvr.blast.13.i.cil-1.c[74354,74367] [2021-12-17 03:16:32,183 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 03:16:32,196 INFO L208 MainTranslator]: Completed translation [2021-12-17 03:16:32,196 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:16:32 WrapperNode [2021-12-17 03:16:32,196 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 03:16:32,198 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 03:16:32,198 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 03:16:32,198 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 03:16:32,203 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:16:32" (1/1) ... [2021-12-17 03:16:32,239 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:16:32" (1/1) ... [2021-12-17 03:16:32,275 INFO L137 Inliner]: procedures = 31, calls = 223, calls flagged for inlining = 7, calls inlined = 3, statements flattened = 792 [2021-12-17 03:16:32,275 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 03:16:32,276 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 03:16:32,276 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 03:16:32,276 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 03:16:32,297 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:16:32" (1/1) ... [2021-12-17 03:16:32,297 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:16:32" (1/1) ... [2021-12-17 03:16:32,301 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:16:32" (1/1) ... [2021-12-17 03:16:32,302 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:16:32" (1/1) ... [2021-12-17 03:16:32,329 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:16:32" (1/1) ... [2021-12-17 03:16:32,334 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:16:32" (1/1) ... [2021-12-17 03:16:32,336 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:16:32" (1/1) ... [2021-12-17 03:16:32,339 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 03:16:32,339 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 03:16:32,339 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 03:16:32,339 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 03:16:32,340 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:16:32" (1/1) ... [2021-12-17 03:16:32,357 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 03:16:32,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 03:16:32,413 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-17 03:16:32,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-17 03:16:32,469 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 03:16:32,469 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-17 03:16:32,469 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-17 03:16:32,469 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-17 03:16:32,469 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-17 03:16:32,469 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 03:16:32,469 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-17 03:16:32,470 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 03:16:32,470 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 03:16:32,611 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 03:16:32,613 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 03:16:32,624 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-17 03:16:33,944 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2021-12-17 03:16:33,944 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2021-12-17 03:16:33,944 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 03:16:33,949 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 03:16:33,949 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-17 03:16:33,950 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 03:16:33 BoogieIcfgContainer [2021-12-17 03:16:33,950 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 03:16:33,951 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 03:16:33,951 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 03:16:33,953 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 03:16:33,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 03:16:31" (1/3) ... [2021-12-17 03:16:33,954 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@619b694b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 03:16:33, skipping insertion in model container [2021-12-17 03:16:33,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:16:32" (2/3) ... [2021-12-17 03:16:33,954 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@619b694b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 03:16:33, skipping insertion in model container [2021-12-17 03:16:33,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 03:16:33" (3/3) ... [2021-12-17 03:16:33,955 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.13.i.cil-1.c [2021-12-17 03:16:33,958 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 03:16:33,958 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 03:16:33,984 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 03:16:33,988 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=PETRI_NET, 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 [2021-12-17 03:16:33,988 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 03:16:34,007 INFO L276 IsEmpty]: Start isEmpty. Operand has 150 states, 148 states have (on average 1.7162162162162162) internal successors, (254), 149 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:16:34,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-17 03:16:34,013 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:16:34,014 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:16:34,014 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:16:34,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:16:34,019 INFO L85 PathProgramCache]: Analyzing trace with hash -442385417, now seen corresponding path program 1 times [2021-12-17 03:16:34,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:16:34,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369252855] [2021-12-17 03:16:34,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:16:34,026 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:16:34,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:16:34,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:16:34,419 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:16:34,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369252855] [2021-12-17 03:16:34,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369252855] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:16:34,420 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:16:34,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:16:34,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162508343] [2021-12-17 03:16:34,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:16:34,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:16:34,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:16:34,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:16:34,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:16:34,442 INFO L87 Difference]: Start difference. First operand has 150 states, 148 states have (on average 1.7162162162162162) internal successors, (254), 149 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:16:35,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:16:35,203 INFO L93 Difference]: Finished difference Result 325 states and 550 transitions. [2021-12-17 03:16:35,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:16:35,207 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-12-17 03:16:35,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:16:35,214 INFO L225 Difference]: With dead ends: 325 [2021-12-17 03:16:35,216 INFO L226 Difference]: Without dead ends: 165 [2021-12-17 03:16:35,219 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:16:35,221 INFO L933 BasicCegarLoop]: 224 mSDtfsCounter, 36 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 585 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-17 03:16:35,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 585 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-17 03:16:35,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-12-17 03:16:35,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 148. [2021-12-17 03:16:35,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.5578231292517006) internal successors, (229), 147 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:16:35,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 229 transitions. [2021-12-17 03:16:35,273 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 229 transitions. Word has length 37 [2021-12-17 03:16:35,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:16:35,274 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 229 transitions. [2021-12-17 03:16:35,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:16:35,275 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 229 transitions. [2021-12-17 03:16:35,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-17 03:16:35,277 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:16:35,280 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:16:35,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 03:16:35,280 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:16:35,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:16:35,283 INFO L85 PathProgramCache]: Analyzing trace with hash -1650885502, now seen corresponding path program 1 times [2021-12-17 03:16:35,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:16:35,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748767040] [2021-12-17 03:16:35,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:16:35,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:16:35,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:16:35,468 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:16:35,468 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:16:35,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748767040] [2021-12-17 03:16:35,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748767040] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:16:35,474 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:16:35,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:16:35,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287275111] [2021-12-17 03:16:35,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:16:35,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:16:35,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:16:35,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:16:35,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:16:35,476 INFO L87 Difference]: Start difference. First operand 148 states and 229 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) [2021-12-17 03:16:35,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:16:35,882 INFO L93 Difference]: Finished difference Result 292 states and 446 transitions. [2021-12-17 03:16:35,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:16:35,883 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 [2021-12-17 03:16:35,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:16:35,884 INFO L225 Difference]: With dead ends: 292 [2021-12-17 03:16:35,884 INFO L226 Difference]: Without dead ends: 165 [2021-12-17 03:16:35,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:16:35,885 INFO L933 BasicCegarLoop]: 185 mSDtfsCounter, 24 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 03:16:35,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 471 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-17 03:16:35,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-12-17 03:16:35,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 148. [2021-12-17 03:16:35,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.5510204081632653) internal successors, (228), 147 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:16:35,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 228 transitions. [2021-12-17 03:16:35,892 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 228 transitions. Word has length 50 [2021-12-17 03:16:35,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:16:35,892 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 228 transitions. [2021-12-17 03:16:35,893 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) [2021-12-17 03:16:35,893 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 228 transitions. [2021-12-17 03:16:35,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-17 03:16:35,894 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:16:35,894 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] [2021-12-17 03:16:35,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 03:16:35,894 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:16:35,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:16:35,895 INFO L85 PathProgramCache]: Analyzing trace with hash -24642669, now seen corresponding path program 1 times [2021-12-17 03:16:35,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:16:35,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915008619] [2021-12-17 03:16:35,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:16:35,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:16:35,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:16:36,020 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:16:36,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:16:36,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915008619] [2021-12-17 03:16:36,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915008619] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:16:36,021 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:16:36,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:16:36,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078126779] [2021-12-17 03:16:36,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:16:36,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:16:36,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:16:36,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:16:36,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:16:36,024 INFO L87 Difference]: Start difference. First operand 148 states and 228 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:16:36,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:16:36,625 INFO L93 Difference]: Finished difference Result 291 states and 444 transitions. [2021-12-17 03:16:36,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:16:36,625 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-12-17 03:16:36,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:16:36,626 INFO L225 Difference]: With dead ends: 291 [2021-12-17 03:16:36,626 INFO L226 Difference]: Without dead ends: 164 [2021-12-17 03:16:36,627 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:16:36,628 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 28 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 03:16:36,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 473 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 03:16:36,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-12-17 03:16:36,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 148. [2021-12-17 03:16:36,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.5442176870748299) internal successors, (227), 147 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:16:36,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 227 transitions. [2021-12-17 03:16:36,648 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 227 transitions. Word has length 51 [2021-12-17 03:16:36,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:16:36,648 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 227 transitions. [2021-12-17 03:16:36,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:16:36,649 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 227 transitions. [2021-12-17 03:16:36,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-17 03:16:36,651 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:16:36,651 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:16:36,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 03:16:36,652 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:16:36,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:16:36,652 INFO L85 PathProgramCache]: Analyzing trace with hash 840936487, now seen corresponding path program 1 times [2021-12-17 03:16:36,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:16:36,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129388200] [2021-12-17 03:16:36,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:16:36,653 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:16:36,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:16:36,756 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:16:36,756 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:16:36,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129388200] [2021-12-17 03:16:36,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129388200] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:16:36,757 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:16:36,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:16:36,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628235880] [2021-12-17 03:16:36,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:16:36,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:16:36,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:16:36,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:16:36,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:16:36,758 INFO L87 Difference]: Start difference. First operand 148 states and 227 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:16:37,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:16:37,262 INFO L93 Difference]: Finished difference Result 291 states and 443 transitions. [2021-12-17 03:16:37,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:16:37,263 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-12-17 03:16:37,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:16:37,264 INFO L225 Difference]: With dead ends: 291 [2021-12-17 03:16:37,264 INFO L226 Difference]: Without dead ends: 164 [2021-12-17 03:16:37,264 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:16:37,265 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 26 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 03:16:37,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 473 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 03:16:37,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-12-17 03:16:37,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 148. [2021-12-17 03:16:37,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.5374149659863945) internal successors, (226), 147 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:16:37,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 226 transitions. [2021-12-17 03:16:37,271 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 226 transitions. Word has length 51 [2021-12-17 03:16:37,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:16:37,271 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 226 transitions. [2021-12-17 03:16:37,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:16:37,272 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 226 transitions. [2021-12-17 03:16:37,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-17 03:16:37,273 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:16:37,273 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] [2021-12-17 03:16:37,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 03:16:37,273 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:16:37,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:16:37,274 INFO L85 PathProgramCache]: Analyzing trace with hash 451751422, now seen corresponding path program 1 times [2021-12-17 03:16:37,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:16:37,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975788710] [2021-12-17 03:16:37,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:16:37,274 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:16:37,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:16:37,345 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:16:37,345 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:16:37,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975788710] [2021-12-17 03:16:37,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975788710] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:16:37,346 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:16:37,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:16:37,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999684333] [2021-12-17 03:16:37,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:16:37,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:16:37,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:16:37,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:16:37,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:16:37,347 INFO L87 Difference]: Start difference. First operand 148 states and 226 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:16:37,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:16:37,964 INFO L93 Difference]: Finished difference Result 393 states and 607 transitions. [2021-12-17 03:16:37,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:16:37,964 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-12-17 03:16:37,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:16:37,965 INFO L225 Difference]: With dead ends: 393 [2021-12-17 03:16:37,965 INFO L226 Difference]: Without dead ends: 266 [2021-12-17 03:16:37,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:16:37,966 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 145 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 03:16:37,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 332 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 03:16:37,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-12-17 03:16:37,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 166. [2021-12-17 03:16:37,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 1.5454545454545454) internal successors, (255), 165 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:16:37,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 255 transitions. [2021-12-17 03:16:37,972 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 255 transitions. Word has length 51 [2021-12-17 03:16:37,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:16:37,972 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 255 transitions. [2021-12-17 03:16:37,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:16:37,972 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 255 transitions. [2021-12-17 03:16:37,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-17 03:16:37,973 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:16:37,973 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:16:37,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 03:16:37,973 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:16:37,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:16:37,974 INFO L85 PathProgramCache]: Analyzing trace with hash -88394050, now seen corresponding path program 1 times [2021-12-17 03:16:37,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:16:37,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860897312] [2021-12-17 03:16:37,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:16:37,974 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:16:38,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:16:38,109 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:16:38,110 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:16:38,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860897312] [2021-12-17 03:16:38,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860897312] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:16:38,110 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:16:38,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:16:38,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637902501] [2021-12-17 03:16:38,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:16:38,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:16:38,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:16:38,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:16:38,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:16:38,112 INFO L87 Difference]: Start difference. First operand 166 states and 255 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:16:38,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:16:38,539 INFO L93 Difference]: Finished difference Result 411 states and 635 transitions. [2021-12-17 03:16:38,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:16:38,540 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-12-17 03:16:38,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:16:38,541 INFO L225 Difference]: With dead ends: 411 [2021-12-17 03:16:38,541 INFO L226 Difference]: Without dead ends: 266 [2021-12-17 03:16:38,541 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:16:38,542 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 145 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 03:16:38,542 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 332 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-17 03:16:38,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-12-17 03:16:38,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 166. [2021-12-17 03:16:38,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 1.5333333333333334) internal successors, (253), 165 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:16:38,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 253 transitions. [2021-12-17 03:16:38,554 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 253 transitions. Word has length 51 [2021-12-17 03:16:38,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:16:38,555 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 253 transitions. [2021-12-17 03:16:38,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:16:38,555 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 253 transitions. [2021-12-17 03:16:38,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-17 03:16:38,559 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:16:38,559 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:16:38,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-17 03:16:38,559 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:16:38,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:16:38,560 INFO L85 PathProgramCache]: Analyzing trace with hash -388419541, now seen corresponding path program 1 times [2021-12-17 03:16:38,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:16:38,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124112426] [2021-12-17 03:16:38,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:16:38,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:16:38,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:16:38,636 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:16:38,636 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:16:38,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124112426] [2021-12-17 03:16:38,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124112426] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:16:38,636 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:16:38,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:16:38,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692586904] [2021-12-17 03:16:38,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:16:38,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:16:38,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:16:38,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:16:38,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:16:38,638 INFO L87 Difference]: Start difference. First operand 166 states and 253 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:16:39,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:16:39,210 INFO L93 Difference]: Finished difference Result 411 states and 632 transitions. [2021-12-17 03:16:39,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:16:39,210 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-12-17 03:16:39,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:16:39,211 INFO L225 Difference]: With dead ends: 411 [2021-12-17 03:16:39,211 INFO L226 Difference]: Without dead ends: 266 [2021-12-17 03:16:39,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:16:39,212 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 148 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 03:16:39,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 332 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 03:16:39,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-12-17 03:16:39,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 166. [2021-12-17 03:16:39,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 1.5212121212121212) internal successors, (251), 165 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:16:39,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 251 transitions. [2021-12-17 03:16:39,217 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 251 transitions. Word has length 52 [2021-12-17 03:16:39,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:16:39,217 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 251 transitions. [2021-12-17 03:16:39,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:16:39,217 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 251 transitions. [2021-12-17 03:16:39,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-17 03:16:39,218 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:16:39,218 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:16:39,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-17 03:16:39,218 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:16:39,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:16:39,218 INFO L85 PathProgramCache]: Analyzing trace with hash -162201364, now seen corresponding path program 1 times [2021-12-17 03:16:39,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:16:39,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861453200] [2021-12-17 03:16:39,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:16:39,219 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:16:39,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:16:39,289 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:16:39,289 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:16:39,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861453200] [2021-12-17 03:16:39,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861453200] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:16:39,290 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:16:39,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:16:39,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897634959] [2021-12-17 03:16:39,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:16:39,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:16:39,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:16:39,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:16:39,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:16:39,291 INFO L87 Difference]: Start difference. First operand 166 states and 251 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:16:39,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:16:39,987 INFO L93 Difference]: Finished difference Result 411 states and 629 transitions. [2021-12-17 03:16:39,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:16:39,987 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-12-17 03:16:39,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:16:39,988 INFO L225 Difference]: With dead ends: 411 [2021-12-17 03:16:39,988 INFO L226 Difference]: Without dead ends: 266 [2021-12-17 03:16:39,989 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:16:39,989 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 146 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-17 03:16:39,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 332 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-17 03:16:39,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-12-17 03:16:39,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 166. [2021-12-17 03:16:39,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 1.509090909090909) internal successors, (249), 165 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:16:39,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 249 transitions. [2021-12-17 03:16:39,994 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 249 transitions. Word has length 53 [2021-12-17 03:16:39,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:16:39,994 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 249 transitions. [2021-12-17 03:16:39,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:16:39,995 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 249 transitions. [2021-12-17 03:16:39,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-17 03:16:39,995 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:16:39,995 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:16:39,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-17 03:16:39,996 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:16:39,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:16:39,996 INFO L85 PathProgramCache]: Analyzing trace with hash -2057823088, now seen corresponding path program 1 times [2021-12-17 03:16:39,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:16:39,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65682358] [2021-12-17 03:16:39,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:16:39,997 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:16:40,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:16:40,092 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:16:40,092 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:16:40,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65682358] [2021-12-17 03:16:40,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65682358] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:16:40,092 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:16:40,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:16:40,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422689427] [2021-12-17 03:16:40,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:16:40,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:16:40,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:16:40,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:16:40,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:16:40,094 INFO L87 Difference]: Start difference. First operand 166 states and 249 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:16:41,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:16:41,146 INFO L93 Difference]: Finished difference Result 314 states and 476 transitions. [2021-12-17 03:16:41,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:16:41,146 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-12-17 03:16:41,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:16:41,147 INFO L225 Difference]: With dead ends: 314 [2021-12-17 03:16:41,147 INFO L226 Difference]: Without dead ends: 169 [2021-12-17 03:16:41,147 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:16:41,148 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 11 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-17 03:16:41,148 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 493 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-17 03:16:41,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-12-17 03:16:41,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 166. [2021-12-17 03:16:41,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 1.503030303030303) internal successors, (248), 165 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) [2021-12-17 03:16:41,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 248 transitions. [2021-12-17 03:16:41,151 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 248 transitions. Word has length 54 [2021-12-17 03:16:41,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:16:41,151 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 248 transitions. [2021-12-17 03:16:41,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:16:41,151 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 248 transitions. [2021-12-17 03:16:41,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-17 03:16:41,152 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:16:41,152 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-17 03:16:41,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-17 03:16:41,152 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:16:41,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:16:41,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1297584632, now seen corresponding path program 1 times [2021-12-17 03:16:41,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:16:41,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035136884] [2021-12-17 03:16:41,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:16:41,153 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:16:41,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:16:41,225 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:16:41,226 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:16:41,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035136884] [2021-12-17 03:16:41,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035136884] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:16:41,226 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:16:41,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:16:41,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516983096] [2021-12-17 03:16:41,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:16:41,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:16:41,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:16:41,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:16:41,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:16:41,227 INFO L87 Difference]: Start difference. First operand 166 states and 248 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:16:42,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:16:42,040 INFO L93 Difference]: Finished difference Result 429 states and 652 transitions. [2021-12-17 03:16:42,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:16:42,040 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-12-17 03:16:42,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:16:42,041 INFO L225 Difference]: With dead ends: 429 [2021-12-17 03:16:42,041 INFO L226 Difference]: Without dead ends: 284 [2021-12-17 03:16:42,042 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 [2021-12-17 03:16:42,042 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 132 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-17 03:16:42,042 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 332 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-17 03:16:42,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-12-17 03:16:42,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 194. [2021-12-17 03:16:42,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 1.5233160621761659) internal successors, (294), 193 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:16:42,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 294 transitions. [2021-12-17 03:16:42,047 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 294 transitions. Word has length 54 [2021-12-17 03:16:42,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:16:42,047 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 294 transitions. [2021-12-17 03:16:42,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:16:42,047 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 294 transitions. [2021-12-17 03:16:42,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-17 03:16:42,048 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:16:42,048 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-17 03:16:42,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-17 03:16:42,048 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:16:42,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:16:42,049 INFO L85 PathProgramCache]: Analyzing trace with hash -335911398, now seen corresponding path program 1 times [2021-12-17 03:16:42,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:16:42,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598027042] [2021-12-17 03:16:42,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:16:42,049 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:16:42,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:16:42,134 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:16:42,134 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:16:42,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598027042] [2021-12-17 03:16:42,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598027042] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:16:42,135 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:16:42,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:16:42,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200871332] [2021-12-17 03:16:42,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:16:42,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:16:42,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:16:42,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:16:42,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:16:42,136 INFO L87 Difference]: Start difference. First operand 194 states and 294 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:16:43,371 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:16:43,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:16:43,540 INFO L93 Difference]: Finished difference Result 409 states and 624 transitions. [2021-12-17 03:16:43,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:16:43,541 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-12-17 03:16:43,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:16:43,542 INFO L225 Difference]: With dead ends: 409 [2021-12-17 03:16:43,542 INFO L226 Difference]: Without dead ends: 236 [2021-12-17 03:16:43,542 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 [2021-12-17 03:16:43,542 INFO L933 BasicCegarLoop]: 193 mSDtfsCounter, 30 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-17 03:16:43,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 493 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-17 03:16:43,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-12-17 03:16:43,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 216. [2021-12-17 03:16:43,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 1.5255813953488373) internal successors, (328), 215 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:16:43,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 328 transitions. [2021-12-17 03:16:43,551 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 328 transitions. Word has length 55 [2021-12-17 03:16:43,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:16:43,551 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 328 transitions. [2021-12-17 03:16:43,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:16:43,551 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 328 transitions. [2021-12-17 03:16:43,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-17 03:16:43,552 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:16:43,553 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:16:43,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-17 03:16:43,553 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:16:43,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:16:43,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1348956911, now seen corresponding path program 1 times [2021-12-17 03:16:43,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:16:43,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927756945] [2021-12-17 03:16:43,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:16:43,554 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:16:43,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:16:43,630 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:16:43,630 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:16:43,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927756945] [2021-12-17 03:16:43,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927756945] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:16:43,630 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:16:43,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:16:43,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081132450] [2021-12-17 03:16:43,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:16:43,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:16:43,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:16:43,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:16:43,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:16:43,632 INFO L87 Difference]: Start difference. First operand 216 states and 328 transitions. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:16:44,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:16:44,239 INFO L93 Difference]: Finished difference Result 429 states and 655 transitions. [2021-12-17 03:16:44,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:16:44,239 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-12-17 03:16:44,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:16:44,240 INFO L225 Difference]: With dead ends: 429 [2021-12-17 03:16:44,240 INFO L226 Difference]: Without dead ends: 234 [2021-12-17 03:16:44,240 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 [2021-12-17 03:16:44,241 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 35 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 03:16:44,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 497 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 03:16:44,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-12-17 03:16:44,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 216. [2021-12-17 03:16:44,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 1.5209302325581395) internal successors, (327), 215 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:16:44,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 327 transitions. [2021-12-17 03:16:44,245 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 327 transitions. Word has length 68 [2021-12-17 03:16:44,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:16:44,245 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 327 transitions. [2021-12-17 03:16:44,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:16:44,246 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 327 transitions. [2021-12-17 03:16:44,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-17 03:16:44,246 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:16:44,246 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:16:44,246 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-17 03:16:44,247 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:16:44,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:16:44,247 INFO L85 PathProgramCache]: Analyzing trace with hash -913541186, now seen corresponding path program 1 times [2021-12-17 03:16:44,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:16:44,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735787906] [2021-12-17 03:16:44,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:16:44,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:16:44,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:16:44,337 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:16:44,337 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:16:44,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735787906] [2021-12-17 03:16:44,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735787906] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:16:44,338 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:16:44,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:16:44,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789345456] [2021-12-17 03:16:44,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:16:44,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:16:44,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:16:44,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:16:44,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:16:44,339 INFO L87 Difference]: Start difference. First operand 216 states and 327 transitions. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:16:44,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:16:44,636 INFO L93 Difference]: Finished difference Result 428 states and 652 transitions. [2021-12-17 03:16:44,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:16:44,636 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-12-17 03:16:44,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:16:44,637 INFO L225 Difference]: With dead ends: 428 [2021-12-17 03:16:44,637 INFO L226 Difference]: Without dead ends: 233 [2021-12-17 03:16:44,637 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 [2021-12-17 03:16:44,638 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 39 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 03:16:44,638 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 499 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 03:16:44,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-12-17 03:16:44,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 216. [2021-12-17 03:16:44,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 1.5162790697674418) internal successors, (326), 215 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:16:44,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 326 transitions. [2021-12-17 03:16:44,642 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 326 transitions. Word has length 69 [2021-12-17 03:16:44,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:16:44,642 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 326 transitions. [2021-12-17 03:16:44,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:16:44,642 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 326 transitions. [2021-12-17 03:16:44,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-17 03:16:44,643 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:16:44,643 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:16:44,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-17 03:16:44,643 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:16:44,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:16:44,644 INFO L85 PathProgramCache]: Analyzing trace with hash 149608874, now seen corresponding path program 1 times [2021-12-17 03:16:44,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:16:44,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766782956] [2021-12-17 03:16:44,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:16:44,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:16:44,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:16:44,720 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:16:44,721 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:16:44,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766782956] [2021-12-17 03:16:44,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766782956] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:16:44,721 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:16:44,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:16:44,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830434419] [2021-12-17 03:16:44,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:16:44,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:16:44,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:16:44,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:16:44,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:16:44,723 INFO L87 Difference]: Start difference. First operand 216 states and 326 transitions. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:16:45,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:16:45,773 INFO L93 Difference]: Finished difference Result 428 states and 650 transitions. [2021-12-17 03:16:45,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:16:45,773 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-12-17 03:16:45,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:16:45,774 INFO L225 Difference]: With dead ends: 428 [2021-12-17 03:16:45,774 INFO L226 Difference]: Without dead ends: 233 [2021-12-17 03:16:45,774 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 [2021-12-17 03:16:45,775 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 37 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-17 03:16:45,775 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 499 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-17 03:16:45,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-12-17 03:16:45,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 216. [2021-12-17 03:16:45,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 1.5116279069767442) internal successors, (325), 215 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:16:45,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 325 transitions. [2021-12-17 03:16:45,779 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 325 transitions. Word has length 69 [2021-12-17 03:16:45,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:16:45,779 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 325 transitions. [2021-12-17 03:16:45,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:16:45,779 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 325 transitions. [2021-12-17 03:16:45,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-17 03:16:45,779 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:16:45,779 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:16:45,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-17 03:16:45,779 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:16:45,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:16:45,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1277041085, now seen corresponding path program 1 times [2021-12-17 03:16:45,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:16:45,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177624441] [2021-12-17 03:16:45,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:16:45,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:16:45,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:16:45,882 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:16:45,883 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:16:45,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177624441] [2021-12-17 03:16:45,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177624441] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:16:45,883 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:16:45,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:16:45,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978084420] [2021-12-17 03:16:45,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:16:45,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:16:45,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:16:45,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:16:45,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:16:45,885 INFO L87 Difference]: Start difference. First operand 216 states and 325 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 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) [2021-12-17 03:16:47,691 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.80s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:16:47,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:16:47,876 INFO L93 Difference]: Finished difference Result 418 states and 635 transitions. [2021-12-17 03:16:47,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:16:47,877 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 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 72 [2021-12-17 03:16:47,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:16:47,878 INFO L225 Difference]: With dead ends: 418 [2021-12-17 03:16:47,878 INFO L226 Difference]: Without dead ends: 223 [2021-12-17 03:16:47,878 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:16:47,879 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 26 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-17 03:16:47,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 513 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-17 03:16:47,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-12-17 03:16:47,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 216. [2021-12-17 03:16:47,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 1.5069767441860464) internal successors, (324), 215 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:16:47,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 324 transitions. [2021-12-17 03:16:47,883 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 324 transitions. Word has length 72 [2021-12-17 03:16:47,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:16:47,883 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 324 transitions. [2021-12-17 03:16:47,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 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) [2021-12-17 03:16:47,884 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 324 transitions. [2021-12-17 03:16:47,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-17 03:16:47,884 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:16:47,884 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:16:47,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-17 03:16:47,885 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:16:47,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:16:47,885 INFO L85 PathProgramCache]: Analyzing trace with hash -2072837020, now seen corresponding path program 1 times [2021-12-17 03:16:47,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:16:47,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573001207] [2021-12-17 03:16:47,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:16:47,886 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:16:47,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:16:47,962 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-17 03:16:47,962 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:16:47,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573001207] [2021-12-17 03:16:47,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573001207] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:16:47,964 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:16:47,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:16:47,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593461936] [2021-12-17 03:16:47,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:16:47,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:16:47,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:16:47,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:16:47,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:16:47,965 INFO L87 Difference]: Start difference. First operand 216 states and 324 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:16:48,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:16:48,534 INFO L93 Difference]: Finished difference Result 509 states and 769 transitions. [2021-12-17 03:16:48,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:16:48,535 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-12-17 03:16:48,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:16:48,536 INFO L225 Difference]: With dead ends: 509 [2021-12-17 03:16:48,536 INFO L226 Difference]: Without dead ends: 314 [2021-12-17 03:16:48,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:16:48,537 INFO L933 BasicCegarLoop]: 179 mSDtfsCounter, 91 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 03:16:48,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 465 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 03:16:48,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2021-12-17 03:16:48,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 247. [2021-12-17 03:16:48,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 1.516260162601626) internal successors, (373), 246 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:16:48,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 373 transitions. [2021-12-17 03:16:48,541 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 373 transitions. Word has length 77 [2021-12-17 03:16:48,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:16:48,541 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 373 transitions. [2021-12-17 03:16:48,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:16:48,542 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 373 transitions. [2021-12-17 03:16:48,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-17 03:16:48,542 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:16:48,542 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:16:48,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-17 03:16:48,542 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:16:48,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:16:48,543 INFO L85 PathProgramCache]: Analyzing trace with hash -21853022, now seen corresponding path program 1 times [2021-12-17 03:16:48,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:16:48,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116453295] [2021-12-17 03:16:48,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:16:48,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:16:48,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:16:48,631 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-17 03:16:48,631 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:16:48,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116453295] [2021-12-17 03:16:48,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116453295] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:16:48,631 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:16:48,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:16:48,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066581956] [2021-12-17 03:16:48,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:16:48,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:16:48,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:16:48,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:16:48,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:16:48,633 INFO L87 Difference]: Start difference. First operand 247 states and 373 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:16:50,639 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:16:51,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:16:51,004 INFO L93 Difference]: Finished difference Result 573 states and 875 transitions. [2021-12-17 03:16:51,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:16:51,007 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-12-17 03:16:51,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:16:51,008 INFO L225 Difference]: With dead ends: 573 [2021-12-17 03:16:51,008 INFO L226 Difference]: Without dead ends: 347 [2021-12-17 03:16:51,009 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:16:51,009 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 131 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 60 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-17 03:16:51,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 332 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 259 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-12-17 03:16:51,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-12-17 03:16:51,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 227. [2021-12-17 03:16:51,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 1.5265486725663717) internal successors, (345), 226 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) [2021-12-17 03:16:51,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 345 transitions. [2021-12-17 03:16:51,014 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 345 transitions. Word has length 77 [2021-12-17 03:16:51,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:16:51,014 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 345 transitions. [2021-12-17 03:16:51,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:16:51,015 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 345 transitions. [2021-12-17 03:16:51,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-17 03:16:51,016 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:16:51,017 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:16:51,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-17 03:16:51,017 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:16:51,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:16:51,018 INFO L85 PathProgramCache]: Analyzing trace with hash 700513709, now seen corresponding path program 1 times [2021-12-17 03:16:51,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:16:51,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936351885] [2021-12-17 03:16:51,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:16:51,018 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:16:51,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:16:51,103 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-17 03:16:51,103 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:16:51,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936351885] [2021-12-17 03:16:51,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936351885] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:16:51,103 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:16:51,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:16:51,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815779916] [2021-12-17 03:16:51,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:16:51,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:16:51,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:16:51,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:16:51,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:16:51,105 INFO L87 Difference]: Start difference. First operand 227 states and 345 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 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) [2021-12-17 03:16:51,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:16:51,668 INFO L93 Difference]: Finished difference Result 531 states and 810 transitions. [2021-12-17 03:16:51,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:16:51,669 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 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 82 [2021-12-17 03:16:51,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:16:51,670 INFO L225 Difference]: With dead ends: 531 [2021-12-17 03:16:51,670 INFO L226 Difference]: Without dead ends: 325 [2021-12-17 03:16:51,670 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:16:51,670 INFO L933 BasicCegarLoop]: 185 mSDtfsCounter, 80 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 03:16:51,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 477 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 03:16:51,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-12-17 03:16:51,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 268. [2021-12-17 03:16:51,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 1.546816479400749) internal successors, (413), 267 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:16:51,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 413 transitions. [2021-12-17 03:16:51,675 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 413 transitions. Word has length 82 [2021-12-17 03:16:51,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:16:51,675 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 413 transitions. [2021-12-17 03:16:51,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 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) [2021-12-17 03:16:51,676 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 413 transitions. [2021-12-17 03:16:51,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-17 03:16:51,676 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:16:51,676 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:16:51,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-17 03:16:51,676 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:16:51,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:16:51,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1144853457, now seen corresponding path program 1 times [2021-12-17 03:16:51,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:16:51,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155091902] [2021-12-17 03:16:51,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:16:51,677 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:16:51,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:16:51,785 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-17 03:16:51,785 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:16:51,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155091902] [2021-12-17 03:16:51,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155091902] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:16:51,786 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:16:51,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:16:51,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342642732] [2021-12-17 03:16:51,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:16:51,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:16:51,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:16:51,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:16:51,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:16:51,788 INFO L87 Difference]: Start difference. First operand 268 states and 413 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 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) [2021-12-17 03:16:52,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:16:52,274 INFO L93 Difference]: Finished difference Result 634 states and 981 transitions. [2021-12-17 03:16:52,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:16:52,274 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 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 82 [2021-12-17 03:16:52,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:16:52,276 INFO L225 Difference]: With dead ends: 634 [2021-12-17 03:16:52,276 INFO L226 Difference]: Without dead ends: 387 [2021-12-17 03:16:52,276 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:16:52,277 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 120 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 03:16:52,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 332 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 03:16:52,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-12-17 03:16:52,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 267. [2021-12-17 03:16:52,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 1.5488721804511278) internal successors, (412), 266 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:16:52,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 412 transitions. [2021-12-17 03:16:52,281 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 412 transitions. Word has length 82 [2021-12-17 03:16:52,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:16:52,281 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 412 transitions. [2021-12-17 03:16:52,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 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) [2021-12-17 03:16:52,281 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 412 transitions. [2021-12-17 03:16:52,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-17 03:16:52,282 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:16:52,282 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:16:52,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-17 03:16:52,282 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:16:52,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:16:52,282 INFO L85 PathProgramCache]: Analyzing trace with hash 233723934, now seen corresponding path program 1 times [2021-12-17 03:16:52,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:16:52,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997462300] [2021-12-17 03:16:52,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:16:52,283 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:16:52,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:16:52,348 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-17 03:16:52,348 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:16:52,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997462300] [2021-12-17 03:16:52,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997462300] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:16:52,348 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:16:52,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:16:52,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421031915] [2021-12-17 03:16:52,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:16:52,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:16:52,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:16:52,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:16:52,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:16:52,350 INFO L87 Difference]: Start difference. First operand 267 states and 412 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 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) [2021-12-17 03:16:52,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:16:52,753 INFO L93 Difference]: Finished difference Result 605 states and 936 transitions. [2021-12-17 03:16:52,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:16:52,754 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 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 83 [2021-12-17 03:16:52,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:16:52,755 INFO L225 Difference]: With dead ends: 605 [2021-12-17 03:16:52,755 INFO L226 Difference]: Without dead ends: 359 [2021-12-17 03:16:52,756 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:16:52,756 INFO L933 BasicCegarLoop]: 181 mSDtfsCounter, 73 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 03:16:52,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 469 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-17 03:16:52,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-12-17 03:16:52,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 309. [2021-12-17 03:16:52,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 1.5616883116883118) internal successors, (481), 308 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:16:52,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 481 transitions. [2021-12-17 03:16:52,762 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 481 transitions. Word has length 83 [2021-12-17 03:16:52,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:16:52,762 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 481 transitions. [2021-12-17 03:16:52,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 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) [2021-12-17 03:16:52,763 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 481 transitions. [2021-12-17 03:16:52,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-17 03:16:52,763 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:16:52,763 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:16:52,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-17 03:16:52,764 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:16:52,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:16:52,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1138083364, now seen corresponding path program 1 times [2021-12-17 03:16:52,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:16:52,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862941152] [2021-12-17 03:16:52,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:16:52,765 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:16:52,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:16:52,855 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-17 03:16:52,855 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:16:52,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862941152] [2021-12-17 03:16:52,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862941152] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:16:52,856 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:16:52,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:16:52,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219758220] [2021-12-17 03:16:52,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:16:52,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:16:52,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:16:52,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:16:52,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:16:52,857 INFO L87 Difference]: Start difference. First operand 309 states and 481 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 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) [2021-12-17 03:16:54,686 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.83s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:16:54,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:16:54,867 INFO L93 Difference]: Finished difference Result 646 states and 1009 transitions. [2021-12-17 03:16:54,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:16:54,867 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 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 83 [2021-12-17 03:16:54,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:16:54,868 INFO L225 Difference]: With dead ends: 646 [2021-12-17 03:16:54,868 INFO L226 Difference]: Without dead ends: 358 [2021-12-17 03:16:54,869 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:16:54,869 INFO L933 BasicCegarLoop]: 245 mSDtfsCounter, 38 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-17 03:16:54,869 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 595 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-17 03:16:54,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-12-17 03:16:54,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 333. [2021-12-17 03:16:54,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 1.5632530120481927) internal successors, (519), 332 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:16:54,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 519 transitions. [2021-12-17 03:16:54,874 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 519 transitions. Word has length 83 [2021-12-17 03:16:54,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:16:54,874 INFO L470 AbstractCegarLoop]: Abstraction has 333 states and 519 transitions. [2021-12-17 03:16:54,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 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) [2021-12-17 03:16:54,875 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 519 transitions. [2021-12-17 03:16:54,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-17 03:16:54,875 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:16:54,875 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:16:54,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-17 03:16:54,875 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:16:54,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:16:54,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1409451137, now seen corresponding path program 1 times [2021-12-17 03:16:54,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:16:54,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715435626] [2021-12-17 03:16:54,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:16:54,876 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:16:54,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:16:54,950 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-17 03:16:54,951 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:16:54,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715435626] [2021-12-17 03:16:54,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715435626] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:16:54,951 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:16:54,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:16:54,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789080014] [2021-12-17 03:16:54,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:16:54,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:16:54,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:16:54,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:16:54,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:16:54,952 INFO L87 Difference]: Start difference. First operand 333 states and 519 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) [2021-12-17 03:16:55,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:16:55,400 INFO L93 Difference]: Finished difference Result 693 states and 1078 transitions. [2021-12-17 03:16:55,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:16:55,401 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 96 [2021-12-17 03:16:55,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:16:55,402 INFO L225 Difference]: With dead ends: 693 [2021-12-17 03:16:55,402 INFO L226 Difference]: Without dead ends: 381 [2021-12-17 03:16:55,403 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:16:55,404 INFO L933 BasicCegarLoop]: 183 mSDtfsCounter, 96 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 03:16:55,404 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 471 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-17 03:16:55,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-12-17 03:16:55,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 333. [2021-12-17 03:16:55,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 1.5602409638554218) internal successors, (518), 332 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:16:55,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 518 transitions. [2021-12-17 03:16:55,409 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 518 transitions. Word has length 96 [2021-12-17 03:16:55,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:16:55,409 INFO L470 AbstractCegarLoop]: Abstraction has 333 states and 518 transitions. [2021-12-17 03:16:55,409 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) [2021-12-17 03:16:55,409 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 518 transitions. [2021-12-17 03:16:55,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-17 03:16:55,410 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:16:55,410 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:16:55,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-17 03:16:55,410 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:16:55,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:16:55,410 INFO L85 PathProgramCache]: Analyzing trace with hash 1853351811, now seen corresponding path program 1 times [2021-12-17 03:16:55,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:16:55,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937976341] [2021-12-17 03:16:55,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:16:55,411 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:16:55,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:16:55,490 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-17 03:16:55,491 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:16:55,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937976341] [2021-12-17 03:16:55,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937976341] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:16:55,491 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:16:55,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:16:55,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383207253] [2021-12-17 03:16:55,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:16:55,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:16:55,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:16:55,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:16:55,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:16:55,493 INFO L87 Difference]: Start difference. First operand 333 states and 518 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) [2021-12-17 03:16:56,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:16:56,316 INFO L93 Difference]: Finished difference Result 668 states and 1042 transitions. [2021-12-17 03:16:56,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:16:56,317 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 96 [2021-12-17 03:16:56,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:16:56,318 INFO L225 Difference]: With dead ends: 668 [2021-12-17 03:16:56,318 INFO L226 Difference]: Without dead ends: 356 [2021-12-17 03:16:56,319 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:16:56,319 INFO L933 BasicCegarLoop]: 245 mSDtfsCounter, 45 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-17 03:16:56,319 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 595 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-17 03:16:56,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2021-12-17 03:16:56,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 333. [2021-12-17 03:16:56,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 1.5572289156626506) internal successors, (517), 332 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:16:56,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 517 transitions. [2021-12-17 03:16:56,325 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 517 transitions. Word has length 96 [2021-12-17 03:16:56,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:16:56,325 INFO L470 AbstractCegarLoop]: Abstraction has 333 states and 517 transitions. [2021-12-17 03:16:56,325 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) [2021-12-17 03:16:56,326 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 517 transitions. [2021-12-17 03:16:56,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-17 03:16:56,326 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:16:56,326 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:16:56,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-17 03:16:56,327 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:16:56,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:16:56,327 INFO L85 PathProgramCache]: Analyzing trace with hash 436925762, now seen corresponding path program 1 times [2021-12-17 03:16:56,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:16:56,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557575717] [2021-12-17 03:16:56,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:16:56,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:16:56,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:16:56,402 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-17 03:16:56,402 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:16:56,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557575717] [2021-12-17 03:16:56,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557575717] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:16:56,402 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:16:56,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:16:56,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158912210] [2021-12-17 03:16:56,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:16:56,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:16:56,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:16:56,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:16:56,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:16:56,404 INFO L87 Difference]: Start difference. First operand 333 states and 517 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) [2021-12-17 03:16:58,046 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:16:58,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:16:58,298 INFO L93 Difference]: Finished difference Result 733 states and 1140 transitions. [2021-12-17 03:16:58,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:16:58,298 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 97 [2021-12-17 03:16:58,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:16:58,299 INFO L225 Difference]: With dead ends: 733 [2021-12-17 03:16:58,299 INFO L226 Difference]: Without dead ends: 421 [2021-12-17 03:16:58,300 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:16:58,300 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 148 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-17 03:16:58,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 336 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-17 03:16:58,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2021-12-17 03:16:58,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 333. [2021-12-17 03:16:58,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 1.5421686746987953) internal successors, (512), 332 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:16:58,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 512 transitions. [2021-12-17 03:16:58,305 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 512 transitions. Word has length 97 [2021-12-17 03:16:58,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:16:58,305 INFO L470 AbstractCegarLoop]: Abstraction has 333 states and 512 transitions. [2021-12-17 03:16:58,306 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) [2021-12-17 03:16:58,306 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 512 transitions. [2021-12-17 03:16:58,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-17 03:16:58,306 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:16:58,306 INFO L514 BasicCegarLoop]: trace histogram [4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:16:58,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-17 03:16:58,306 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:16:58,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:16:58,307 INFO L85 PathProgramCache]: Analyzing trace with hash -610585042, now seen corresponding path program 1 times [2021-12-17 03:16:58,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:16:58,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5505701] [2021-12-17 03:16:58,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:16:58,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:16:58,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:16:58,392 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-17 03:16:58,393 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:16:58,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5505701] [2021-12-17 03:16:58,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5505701] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:16:58,393 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:16:58,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 03:16:58,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929609444] [2021-12-17 03:16:58,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:16:58,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 03:16:58,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:16:58,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 03:16:58,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:16:58,395 INFO L87 Difference]: Start difference. First operand 333 states and 512 transitions. Second operand has 5 states, 5 states have (on average 16.6) internal successors, (83), 5 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) [2021-12-17 03:17:00,400 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:17:02,420 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:17:02,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:17:02,698 INFO L93 Difference]: Finished difference Result 655 states and 1012 transitions. [2021-12-17 03:17:02,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 03:17:02,698 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 5 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 97 [2021-12-17 03:17:02,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:17:02,700 INFO L225 Difference]: With dead ends: 655 [2021-12-17 03:17:02,700 INFO L226 Difference]: Without dead ends: 343 [2021-12-17 03:17:02,700 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-17 03:17:02,700 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 152 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 41 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-12-17 03:17:02,701 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 354 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 310 Invalid, 2 Unknown, 0 Unchecked, 4.3s Time] [2021-12-17 03:17:02,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2021-12-17 03:17:02,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 342. [2021-12-17 03:17:02,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 1.533724340175953) internal successors, (523), 341 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:17:02,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 523 transitions. [2021-12-17 03:17:02,705 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 523 transitions. Word has length 97 [2021-12-17 03:17:02,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:17:02,706 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 523 transitions. [2021-12-17 03:17:02,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 5 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) [2021-12-17 03:17:02,706 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 523 transitions. [2021-12-17 03:17:02,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-12-17 03:17:02,706 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:17:02,706 INFO L514 BasicCegarLoop]: trace histogram [4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:17:02,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-17 03:17:02,707 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:17:02,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:17:02,723 INFO L85 PathProgramCache]: Analyzing trace with hash -1076896027, now seen corresponding path program 1 times [2021-12-17 03:17:02,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:17:02,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96044684] [2021-12-17 03:17:02,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:17:02,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:17:02,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:17:02,821 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-17 03:17:02,821 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:17:02,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96044684] [2021-12-17 03:17:02,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96044684] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:17:02,822 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:17:02,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:17:02,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143189288] [2021-12-17 03:17:02,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:17:02,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:17:02,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:17:02,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:17:02,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:17:02,824 INFO L87 Difference]: Start difference. First operand 342 states and 523 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) [2021-12-17 03:17:04,004 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:17:04,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:17:04,308 INFO L93 Difference]: Finished difference Result 751 states and 1151 transitions. [2021-12-17 03:17:04,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:17:04,309 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 98 [2021-12-17 03:17:04,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:17:04,310 INFO L225 Difference]: With dead ends: 751 [2021-12-17 03:17:04,310 INFO L226 Difference]: Without dead ends: 430 [2021-12-17 03:17:04,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:17:04,311 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 146 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-17 03:17:04,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 338 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-17 03:17:04,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2021-12-17 03:17:04,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 342. [2021-12-17 03:17:04,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 1.5190615835777126) internal successors, (518), 341 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:17:04,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 518 transitions. [2021-12-17 03:17:04,318 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 518 transitions. Word has length 98 [2021-12-17 03:17:04,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:17:04,318 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 518 transitions. [2021-12-17 03:17:04,318 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) [2021-12-17 03:17:04,318 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 518 transitions. [2021-12-17 03:17:04,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-17 03:17:04,319 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:17:04,319 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:17:04,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-17 03:17:04,320 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:17:04,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:17:04,320 INFO L85 PathProgramCache]: Analyzing trace with hash 742256768, now seen corresponding path program 1 times [2021-12-17 03:17:04,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:17:04,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756101007] [2021-12-17 03:17:04,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:17:04,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:17:04,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:17:04,406 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-17 03:17:04,407 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:17:04,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756101007] [2021-12-17 03:17:04,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756101007] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:17:04,408 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:17:04,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:17:04,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047905273] [2021-12-17 03:17:04,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:17:04,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:17:04,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:17:04,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:17:04,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:17:04,409 INFO L87 Difference]: Start difference. First operand 342 states and 518 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) [2021-12-17 03:17:05,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:17:05,030 INFO L93 Difference]: Finished difference Result 700 states and 1062 transitions. [2021-12-17 03:17:05,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:17:05,031 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 101 [2021-12-17 03:17:05,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:17:05,032 INFO L225 Difference]: With dead ends: 700 [2021-12-17 03:17:05,032 INFO L226 Difference]: Without dead ends: 379 [2021-12-17 03:17:05,032 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:17:05,033 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 87 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 03:17:05,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 487 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 03:17:05,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-12-17 03:17:05,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 342. [2021-12-17 03:17:05,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 1.5161290322580645) internal successors, (517), 341 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:17:05,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 517 transitions. [2021-12-17 03:17:05,038 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 517 transitions. Word has length 101 [2021-12-17 03:17:05,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:17:05,038 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 517 transitions. [2021-12-17 03:17:05,038 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) [2021-12-17 03:17:05,038 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 517 transitions. [2021-12-17 03:17:05,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-17 03:17:05,039 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:17:05,039 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:17:05,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-17 03:17:05,040 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:17:05,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:17:05,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1175985854, now seen corresponding path program 1 times [2021-12-17 03:17:05,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:17:05,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786895083] [2021-12-17 03:17:05,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:17:05,042 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:17:05,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:17:05,109 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-17 03:17:05,110 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:17:05,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786895083] [2021-12-17 03:17:05,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786895083] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:17:05,110 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:17:05,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:17:05,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049433474] [2021-12-17 03:17:05,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:17:05,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:17:05,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:17:05,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:17:05,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:17:05,111 INFO L87 Difference]: Start difference. First operand 342 states and 517 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) [2021-12-17 03:17:06,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:17:06,264 INFO L93 Difference]: Finished difference Result 675 states and 1026 transitions. [2021-12-17 03:17:06,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:17:06,265 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 101 [2021-12-17 03:17:06,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:17:06,266 INFO L225 Difference]: With dead ends: 675 [2021-12-17 03:17:06,266 INFO L226 Difference]: Without dead ends: 354 [2021-12-17 03:17:06,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:17:06,266 INFO L933 BasicCegarLoop]: 236 mSDtfsCounter, 36 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 577 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-17 03:17:06,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 577 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-17 03:17:06,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-12-17 03:17:06,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 342. [2021-12-17 03:17:06,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 1.5131964809384164) internal successors, (516), 341 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:17:06,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 516 transitions. [2021-12-17 03:17:06,273 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 516 transitions. Word has length 101 [2021-12-17 03:17:06,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:17:06,273 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 516 transitions. [2021-12-17 03:17:06,273 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) [2021-12-17 03:17:06,273 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 516 transitions. [2021-12-17 03:17:06,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-12-17 03:17:06,274 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:17:06,274 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:17:06,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-17 03:17:06,274 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:17:06,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:17:06,275 INFO L85 PathProgramCache]: Analyzing trace with hash 280390343, now seen corresponding path program 1 times [2021-12-17 03:17:06,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:17:06,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692108605] [2021-12-17 03:17:06,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:17:06,275 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:17:06,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:17:06,387 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-17 03:17:06,387 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:17:06,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692108605] [2021-12-17 03:17:06,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692108605] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:17:06,387 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:17:06,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:17:06,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423358228] [2021-12-17 03:17:06,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:17:06,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:17:06,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:17:06,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:17:06,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:17:06,389 INFO L87 Difference]: Start difference. First operand 342 states and 516 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) [2021-12-17 03:17:07,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:17:07,322 INFO L93 Difference]: Finished difference Result 790 states and 1201 transitions. [2021-12-17 03:17:07,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:17:07,323 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 104 [2021-12-17 03:17:07,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:17:07,324 INFO L225 Difference]: With dead ends: 790 [2021-12-17 03:17:07,324 INFO L226 Difference]: Without dead ends: 469 [2021-12-17 03:17:07,324 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:17:07,325 INFO L933 BasicCegarLoop]: 143 mSDtfsCounter, 131 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-17 03:17:07,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 386 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-17 03:17:07,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-12-17 03:17:07,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 368. [2021-12-17 03:17:07,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 1.5068119891008174) internal successors, (553), 367 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:17:07,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 553 transitions. [2021-12-17 03:17:07,331 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 553 transitions. Word has length 104 [2021-12-17 03:17:07,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:17:07,331 INFO L470 AbstractCegarLoop]: Abstraction has 368 states and 553 transitions. [2021-12-17 03:17:07,331 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) [2021-12-17 03:17:07,331 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 553 transitions. [2021-12-17 03:17:07,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-12-17 03:17:07,332 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:17:07,332 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:17:07,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-12-17 03:17:07,332 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:17:07,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:17:07,332 INFO L85 PathProgramCache]: Analyzing trace with hash 318897402, now seen corresponding path program 1 times [2021-12-17 03:17:07,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:17:07,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688607587] [2021-12-17 03:17:07,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:17:07,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:17:07,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:17:07,400 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-17 03:17:07,400 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:17:07,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688607587] [2021-12-17 03:17:07,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688607587] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:17:07,401 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:17:07,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:17:07,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594757329] [2021-12-17 03:17:07,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:17:07,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:17:07,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:17:07,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:17:07,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:17:07,402 INFO L87 Difference]: Start difference. First operand 368 states and 553 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) [2021-12-17 03:17:08,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:17:08,589 INFO L93 Difference]: Finished difference Result 752 states and 1132 transitions. [2021-12-17 03:17:08,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:17:08,590 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 105 [2021-12-17 03:17:08,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:17:08,591 INFO L225 Difference]: With dead ends: 752 [2021-12-17 03:17:08,591 INFO L226 Difference]: Without dead ends: 405 [2021-12-17 03:17:08,591 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:17:08,592 INFO L933 BasicCegarLoop]: 198 mSDtfsCounter, 76 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:17:08,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 503 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-17 03:17:08,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2021-12-17 03:17:08,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 368. [2021-12-17 03:17:08,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 1.5040871934604905) internal successors, (552), 367 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:17:08,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 552 transitions. [2021-12-17 03:17:08,598 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 552 transitions. Word has length 105 [2021-12-17 03:17:08,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:17:08,598 INFO L470 AbstractCegarLoop]: Abstraction has 368 states and 552 transitions. [2021-12-17 03:17:08,598 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) [2021-12-17 03:17:08,598 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 552 transitions. [2021-12-17 03:17:08,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-12-17 03:17:08,600 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:17:08,600 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:17:08,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-12-17 03:17:08,600 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:17:08,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:17:08,601 INFO L85 PathProgramCache]: Analyzing trace with hash 509759261, now seen corresponding path program 1 times [2021-12-17 03:17:08,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:17:08,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892976031] [2021-12-17 03:17:08,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:17:08,601 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:17:08,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:17:08,683 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-17 03:17:08,684 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:17:08,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892976031] [2021-12-17 03:17:08,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892976031] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:17:08,684 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:17:08,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:17:08,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416762028] [2021-12-17 03:17:08,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:17:08,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:17:08,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:17:08,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:17:08,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:17:08,685 INFO L87 Difference]: Start difference. First operand 368 states and 552 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) [2021-12-17 03:17:10,292 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:17:10,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:17:10,585 INFO L93 Difference]: Finished difference Result 750 states and 1127 transitions. [2021-12-17 03:17:10,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:17:10,585 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 105 [2021-12-17 03:17:10,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:17:10,586 INFO L225 Difference]: With dead ends: 750 [2021-12-17 03:17:10,586 INFO L226 Difference]: Without dead ends: 403 [2021-12-17 03:17:10,587 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:17:10,587 INFO L933 BasicCegarLoop]: 201 mSDtfsCounter, 71 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-17 03:17:10,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 509 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-17 03:17:10,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2021-12-17 03:17:10,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 368. [2021-12-17 03:17:10,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 1.5013623978201636) internal successors, (551), 367 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:17:10,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 551 transitions. [2021-12-17 03:17:10,592 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 551 transitions. Word has length 105 [2021-12-17 03:17:10,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:17:10,593 INFO L470 AbstractCegarLoop]: Abstraction has 368 states and 551 transitions. [2021-12-17 03:17:10,593 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) [2021-12-17 03:17:10,593 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 551 transitions. [2021-12-17 03:17:10,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-12-17 03:17:10,594 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:17:10,594 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:17:10,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-12-17 03:17:10,594 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:17:10,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:17:10,594 INFO L85 PathProgramCache]: Analyzing trace with hash -213108826, now seen corresponding path program 1 times [2021-12-17 03:17:10,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:17:10,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768202042] [2021-12-17 03:17:10,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:17:10,595 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:17:10,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:17:10,660 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-17 03:17:10,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:17:10,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768202042] [2021-12-17 03:17:10,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768202042] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:17:10,660 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:17:10,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:17:10,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868710077] [2021-12-17 03:17:10,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:17:10,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:17:10,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:17:10,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:17:10,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:17:10,662 INFO L87 Difference]: Start difference. First operand 368 states and 551 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) [2021-12-17 03:17:11,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:17:11,088 INFO L93 Difference]: Finished difference Result 747 states and 1121 transitions. [2021-12-17 03:17:11,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:17:11,089 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 105 [2021-12-17 03:17:11,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:17:11,090 INFO L225 Difference]: With dead ends: 747 [2021-12-17 03:17:11,091 INFO L226 Difference]: Without dead ends: 400 [2021-12-17 03:17:11,091 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:17:11,092 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 64 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 515 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 03:17:11,092 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 515 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-17 03:17:11,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-12-17 03:17:11,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 368. [2021-12-17 03:17:11,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 1.4986376021798364) internal successors, (550), 367 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:17:11,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 550 transitions. [2021-12-17 03:17:11,099 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 550 transitions. Word has length 105 [2021-12-17 03:17:11,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:17:11,099 INFO L470 AbstractCegarLoop]: Abstraction has 368 states and 550 transitions. [2021-12-17 03:17:11,099 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) [2021-12-17 03:17:11,099 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 550 transitions. [2021-12-17 03:17:11,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-12-17 03:17:11,100 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:17:11,100 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:17:11,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-12-17 03:17:11,101 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:17:11,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:17:11,101 INFO L85 PathProgramCache]: Analyzing trace with hash 998169656, now seen corresponding path program 1 times [2021-12-17 03:17:11,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:17:11,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521016617] [2021-12-17 03:17:11,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:17:11,102 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:17:11,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:17:11,173 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-17 03:17:11,173 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:17:11,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521016617] [2021-12-17 03:17:11,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521016617] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:17:11,174 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:17:11,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 03:17:11,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419572804] [2021-12-17 03:17:11,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:17:11,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:17:11,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:17:11,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:17:11,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:17:11,175 INFO L87 Difference]: Start difference. First operand 368 states and 550 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 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) [2021-12-17 03:17:11,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:17:11,207 INFO L93 Difference]: Finished difference Result 1057 states and 1596 transitions. [2021-12-17 03:17:11,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:17:11,207 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 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 105 [2021-12-17 03:17:11,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:17:11,209 INFO L225 Difference]: With dead ends: 1057 [2021-12-17 03:17:11,209 INFO L226 Difference]: Without dead ends: 710 [2021-12-17 03:17:11,209 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:17:11,210 INFO L933 BasicCegarLoop]: 237 mSDtfsCounter, 137 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 03:17:11,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 426 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 03:17:11,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2021-12-17 03:17:11,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 710. [2021-12-17 03:17:11,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 710 states, 709 states have (on average 1.4964739069111423) internal successors, (1061), 709 states have internal predecessors, (1061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:17:11,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 710 states to 710 states and 1061 transitions. [2021-12-17 03:17:11,219 INFO L78 Accepts]: Start accepts. Automaton has 710 states and 1061 transitions. Word has length 105 [2021-12-17 03:17:11,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:17:11,220 INFO L470 AbstractCegarLoop]: Abstraction has 710 states and 1061 transitions. [2021-12-17 03:17:11,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 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) [2021-12-17 03:17:11,220 INFO L276 IsEmpty]: Start isEmpty. Operand 710 states and 1061 transitions. [2021-12-17 03:17:11,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-12-17 03:17:11,221 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:17:11,221 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:17:11,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-12-17 03:17:11,221 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:17:11,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:17:11,222 INFO L85 PathProgramCache]: Analyzing trace with hash 943776758, now seen corresponding path program 1 times [2021-12-17 03:17:11,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:17:11,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697459892] [2021-12-17 03:17:11,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:17:11,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:17:11,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:17:11,273 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-17 03:17:11,273 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:17:11,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697459892] [2021-12-17 03:17:11,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697459892] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:17:11,273 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:17:11,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 03:17:11,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941976676] [2021-12-17 03:17:11,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:17:11,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:17:11,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:17:11,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:17:11,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:17:11,275 INFO L87 Difference]: Start difference. First operand 710 states and 1061 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 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) [2021-12-17 03:17:11,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:17:11,298 INFO L93 Difference]: Finished difference Result 1426 states and 2134 transitions. [2021-12-17 03:17:11,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:17:11,298 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 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 105 [2021-12-17 03:17:11,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:17:11,300 INFO L225 Difference]: With dead ends: 1426 [2021-12-17 03:17:11,300 INFO L226 Difference]: Without dead ends: 737 [2021-12-17 03:17:11,300 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:17:11,301 INFO L933 BasicCegarLoop]: 221 mSDtfsCounter, 15 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 03:17:11,302 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 410 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 03:17:11,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 737 states. [2021-12-17 03:17:11,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 737 to 737. [2021-12-17 03:17:11,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 737 states, 736 states have (on average 1.4891304347826086) internal successors, (1096), 736 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:17:11,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 1096 transitions. [2021-12-17 03:17:11,313 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 1096 transitions. Word has length 105 [2021-12-17 03:17:11,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:17:11,313 INFO L470 AbstractCegarLoop]: Abstraction has 737 states and 1096 transitions. [2021-12-17 03:17:11,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 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) [2021-12-17 03:17:11,313 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 1096 transitions. [2021-12-17 03:17:11,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-12-17 03:17:11,314 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:17:11,314 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:17:11,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-12-17 03:17:11,315 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:17:11,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:17:11,315 INFO L85 PathProgramCache]: Analyzing trace with hash -935354188, now seen corresponding path program 1 times [2021-12-17 03:17:11,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:17:11,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671049974] [2021-12-17 03:17:11,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:17:11,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:17:11,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:17:11,386 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-12-17 03:17:11,386 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:17:11,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671049974] [2021-12-17 03:17:11,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671049974] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:17:11,387 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:17:11,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 03:17:11,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821891157] [2021-12-17 03:17:11,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:17:11,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:17:11,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:17:11,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:17:11,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:17:11,388 INFO L87 Difference]: Start difference. First operand 737 states and 1096 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:17:11,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:17:11,408 INFO L93 Difference]: Finished difference Result 1455 states and 2170 transitions. [2021-12-17 03:17:11,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:17:11,408 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-12-17 03:17:11,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:17:11,410 INFO L225 Difference]: With dead ends: 1455 [2021-12-17 03:17:11,410 INFO L226 Difference]: Without dead ends: 739 [2021-12-17 03:17:11,411 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:17:11,411 INFO L933 BasicCegarLoop]: 209 mSDtfsCounter, 4 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 03:17:11,411 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 389 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 03:17:11,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 739 states. [2021-12-17 03:17:11,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 739 to 739. [2021-12-17 03:17:11,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 739 states, 738 states have (on average 1.4878048780487805) internal successors, (1098), 738 states have internal predecessors, (1098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:17:11,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 739 states to 739 states and 1098 transitions. [2021-12-17 03:17:11,423 INFO L78 Accepts]: Start accepts. Automaton has 739 states and 1098 transitions. Word has length 105 [2021-12-17 03:17:11,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:17:11,423 INFO L470 AbstractCegarLoop]: Abstraction has 739 states and 1098 transitions. [2021-12-17 03:17:11,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:17:11,423 INFO L276 IsEmpty]: Start isEmpty. Operand 739 states and 1098 transitions. [2021-12-17 03:17:11,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-12-17 03:17:11,424 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:17:11,424 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:17:11,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-12-17 03:17:11,424 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:17:11,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:17:11,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1675942322, now seen corresponding path program 1 times [2021-12-17 03:17:11,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:17:11,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922814990] [2021-12-17 03:17:11,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:17:11,425 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:17:11,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:17:11,486 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-17 03:17:11,486 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:17:11,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922814990] [2021-12-17 03:17:11,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922814990] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:17:11,486 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:17:11,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 03:17:11,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514179626] [2021-12-17 03:17:11,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:17:11,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:17:11,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:17:11,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:17:11,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:17:11,488 INFO L87 Difference]: Start difference. First operand 739 states and 1098 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 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) [2021-12-17 03:17:11,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:17:11,528 INFO L93 Difference]: Finished difference Result 1802 states and 2694 transitions. [2021-12-17 03:17:11,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:17:11,529 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 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 107 [2021-12-17 03:17:11,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:17:11,531 INFO L225 Difference]: With dead ends: 1802 [2021-12-17 03:17:11,531 INFO L226 Difference]: Without dead ends: 1086 [2021-12-17 03:17:11,532 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:17:11,533 INFO L933 BasicCegarLoop]: 380 mSDtfsCounter, 149 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 569 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 03:17:11,533 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 569 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 03:17:11,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1086 states. [2021-12-17 03:17:11,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1086 to 1084. [2021-12-17 03:17:11,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1084 states, 1083 states have (on average 1.4912280701754386) internal successors, (1615), 1083 states have internal predecessors, (1615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:17:11,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1084 states to 1084 states and 1615 transitions. [2021-12-17 03:17:11,550 INFO L78 Accepts]: Start accepts. Automaton has 1084 states and 1615 transitions. Word has length 107 [2021-12-17 03:17:11,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:17:11,550 INFO L470 AbstractCegarLoop]: Abstraction has 1084 states and 1615 transitions. [2021-12-17 03:17:11,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 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) [2021-12-17 03:17:11,550 INFO L276 IsEmpty]: Start isEmpty. Operand 1084 states and 1615 transitions. [2021-12-17 03:17:11,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-12-17 03:17:11,552 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:17:11,552 INFO L514 BasicCegarLoop]: trace histogram [4, 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, 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] [2021-12-17 03:17:11,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-12-17 03:17:11,552 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:17:11,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:17:11,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1041814139, now seen corresponding path program 1 times [2021-12-17 03:17:11,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:17:11,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183393272] [2021-12-17 03:17:11,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:17:11,553 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:17:11,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:17:11,637 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-17 03:17:11,637 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:17:11,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183393272] [2021-12-17 03:17:11,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183393272] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:17:11,638 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:17:11,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 03:17:11,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116343692] [2021-12-17 03:17:11,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:17:11,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:17:11,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:17:11,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:17:11,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:17:11,640 INFO L87 Difference]: Start difference. First operand 1084 states and 1615 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 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) [2021-12-17 03:17:11,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:17:11,699 INFO L93 Difference]: Finished difference Result 2486 states and 3722 transitions. [2021-12-17 03:17:11,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:17:11,699 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 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 124 [2021-12-17 03:17:11,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:17:11,703 INFO L225 Difference]: With dead ends: 2486 [2021-12-17 03:17:11,703 INFO L226 Difference]: Without dead ends: 1425 [2021-12-17 03:17:11,704 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:17:11,704 INFO L933 BasicCegarLoop]: 378 mSDtfsCounter, 142 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 567 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 03:17:11,705 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 567 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 03:17:11,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1425 states. [2021-12-17 03:17:11,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1425 to 1425. [2021-12-17 03:17:11,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1425 states, 1424 states have (on average 1.4915730337078652) internal successors, (2124), 1424 states have internal predecessors, (2124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:17:11,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1425 states to 1425 states and 2124 transitions. [2021-12-17 03:17:11,725 INFO L78 Accepts]: Start accepts. Automaton has 1425 states and 2124 transitions. Word has length 124 [2021-12-17 03:17:11,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:17:11,725 INFO L470 AbstractCegarLoop]: Abstraction has 1425 states and 2124 transitions. [2021-12-17 03:17:11,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 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) [2021-12-17 03:17:11,726 INFO L276 IsEmpty]: Start isEmpty. Operand 1425 states and 2124 transitions. [2021-12-17 03:17:11,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-12-17 03:17:11,727 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:17:11,727 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:17:11,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-12-17 03:17:11,728 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:17:11,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:17:11,729 INFO L85 PathProgramCache]: Analyzing trace with hash 726227607, now seen corresponding path program 1 times [2021-12-17 03:17:11,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:17:11,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533730454] [2021-12-17 03:17:11,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:17:11,729 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:17:11,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:17:11,816 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 94 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-17 03:17:11,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:17:11,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533730454] [2021-12-17 03:17:11,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533730454] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:17:11,817 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:17:11,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 03:17:11,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146450101] [2021-12-17 03:17:11,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:17:11,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:17:11,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:17:11,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:17:11,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:17:11,819 INFO L87 Difference]: Start difference. First operand 1425 states and 2124 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:17:11,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:17:11,875 INFO L93 Difference]: Finished difference Result 2119 states and 3160 transitions. [2021-12-17 03:17:11,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:17:11,875 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 128 [2021-12-17 03:17:11,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:17:11,879 INFO L225 Difference]: With dead ends: 2119 [2021-12-17 03:17:11,879 INFO L226 Difference]: Without dead ends: 1772 [2021-12-17 03:17:11,880 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:17:11,881 INFO L933 BasicCegarLoop]: 193 mSDtfsCounter, 157 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 03:17:11,881 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 373 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 03:17:11,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1772 states. [2021-12-17 03:17:11,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1772 to 1770. [2021-12-17 03:17:11,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1770 states, 1769 states have (on average 1.4906726964386658) internal successors, (2637), 1769 states have internal predecessors, (2637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:17:11,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1770 states to 1770 states and 2637 transitions. [2021-12-17 03:17:11,908 INFO L78 Accepts]: Start accepts. Automaton has 1770 states and 2637 transitions. Word has length 128 [2021-12-17 03:17:11,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:17:11,908 INFO L470 AbstractCegarLoop]: Abstraction has 1770 states and 2637 transitions. [2021-12-17 03:17:11,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:17:11,908 INFO L276 IsEmpty]: Start isEmpty. Operand 1770 states and 2637 transitions. [2021-12-17 03:17:11,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-12-17 03:17:11,910 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:17:11,910 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:17:11,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-12-17 03:17:11,911 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:17:11,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:17:11,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1329906676, now seen corresponding path program 1 times [2021-12-17 03:17:11,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:17:11,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927143878] [2021-12-17 03:17:11,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:17:11,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:17:11,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:17:11,993 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-12-17 03:17:11,993 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:17:11,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927143878] [2021-12-17 03:17:11,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927143878] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:17:11,993 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:17:11,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 03:17:11,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396930014] [2021-12-17 03:17:11,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:17:11,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:17:11,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:17:11,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:17:11,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:17:11,995 INFO L87 Difference]: Start difference. First operand 1770 states and 2637 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 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) [2021-12-17 03:17:12,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:17:12,033 INFO L93 Difference]: Finished difference Result 2119 states and 3156 transitions. [2021-12-17 03:17:12,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:17:12,034 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 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 129 [2021-12-17 03:17:12,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:17:12,039 INFO L225 Difference]: With dead ends: 2119 [2021-12-17 03:17:12,039 INFO L226 Difference]: Without dead ends: 2117 [2021-12-17 03:17:12,041 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:17:12,041 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 165 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 03:17:12,041 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 371 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 03:17:12,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2117 states. [2021-12-17 03:17:12,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2117 to 2115. [2021-12-17 03:17:12,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2115 states, 2114 states have (on average 1.4914853358561968) internal successors, (3153), 2114 states have internal predecessors, (3153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:17:12,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2115 states to 2115 states and 3153 transitions. [2021-12-17 03:17:12,094 INFO L78 Accepts]: Start accepts. Automaton has 2115 states and 3153 transitions. Word has length 129 [2021-12-17 03:17:12,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:17:12,094 INFO L470 AbstractCegarLoop]: Abstraction has 2115 states and 3153 transitions. [2021-12-17 03:17:12,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 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) [2021-12-17 03:17:12,095 INFO L276 IsEmpty]: Start isEmpty. Operand 2115 states and 3153 transitions. [2021-12-17 03:17:12,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-12-17 03:17:12,098 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:17:12,098 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] [2021-12-17 03:17:12,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-12-17 03:17:12,099 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:17:12,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:17:12,101 INFO L85 PathProgramCache]: Analyzing trace with hash -991027209, now seen corresponding path program 1 times [2021-12-17 03:17:12,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:17:12,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560001847] [2021-12-17 03:17:12,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:17:12,101 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:17:12,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:17:12,180 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 96 proven. 0 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-12-17 03:17:12,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:17:12,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560001847] [2021-12-17 03:17:12,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560001847] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:17:12,180 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:17:12,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 03:17:12,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746375884] [2021-12-17 03:17:12,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:17:12,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:17:12,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:17:12,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:17:12,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:17:12,182 INFO L87 Difference]: Start difference. First operand 2115 states and 3153 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) [2021-12-17 03:17:12,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:17:12,229 INFO L93 Difference]: Finished difference Result 4550 states and 6799 transitions. [2021-12-17 03:17:12,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:17:12,229 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 [2021-12-17 03:17:12,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:17:12,235 INFO L225 Difference]: With dead ends: 4550 [2021-12-17 03:17:12,235 INFO L226 Difference]: Without dead ends: 2458 [2021-12-17 03:17:12,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:17:12,237 INFO L933 BasicCegarLoop]: 383 mSDtfsCounter, 144 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 572 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 03:17:12,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 572 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 03:17:12,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2458 states. [2021-12-17 03:17:12,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2458 to 2458. [2021-12-17 03:17:12,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2458 states, 2457 states have (on average 1.4916564916564916) internal successors, (3665), 2457 states have internal predecessors, (3665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:17:12,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2458 states to 2458 states and 3665 transitions. [2021-12-17 03:17:12,289 INFO L78 Accepts]: Start accepts. Automaton has 2458 states and 3665 transitions. Word has length 166 [2021-12-17 03:17:12,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:17:12,290 INFO L470 AbstractCegarLoop]: Abstraction has 2458 states and 3665 transitions. [2021-12-17 03:17:12,290 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) [2021-12-17 03:17:12,290 INFO L276 IsEmpty]: Start isEmpty. Operand 2458 states and 3665 transitions. [2021-12-17 03:17:12,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-12-17 03:17:12,293 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:17:12,294 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, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:17:12,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-12-17 03:17:12,294 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:17:12,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:17:12,295 INFO L85 PathProgramCache]: Analyzing trace with hash -817303862, now seen corresponding path program 1 times [2021-12-17 03:17:12,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:17:12,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150878966] [2021-12-17 03:17:12,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:17:12,295 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:17:12,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:17:12,391 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 254 proven. 0 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-12-17 03:17:12,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:17:12,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150878966] [2021-12-17 03:17:12,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150878966] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:17:12,392 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:17:12,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:17:12,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766767983] [2021-12-17 03:17:12,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:17:12,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:17:12,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:17:12,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:17:12,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:17:12,395 INFO L87 Difference]: Start difference. First operand 2458 states and 3665 transitions. Second operand has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:17:13,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:17:13,403 INFO L93 Difference]: Finished difference Result 5767 states and 8595 transitions. [2021-12-17 03:17:13,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:17:13,411 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 194 [2021-12-17 03:17:13,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:17:13,422 INFO L225 Difference]: With dead ends: 5767 [2021-12-17 03:17:13,422 INFO L226 Difference]: Without dead ends: 3332 [2021-12-17 03:17:13,424 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 [2021-12-17 03:17:13,424 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 120 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-17 03:17:13,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 336 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-17 03:17:13,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3332 states. [2021-12-17 03:17:13,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3332 to 2773. [2021-12-17 03:17:13,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2773 states, 2772 states have (on average 1.5064935064935066) internal successors, (4176), 2772 states have internal predecessors, (4176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:17:13,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2773 states to 2773 states and 4176 transitions. [2021-12-17 03:17:13,469 INFO L78 Accepts]: Start accepts. Automaton has 2773 states and 4176 transitions. Word has length 194 [2021-12-17 03:17:13,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:17:13,470 INFO L470 AbstractCegarLoop]: Abstraction has 2773 states and 4176 transitions. [2021-12-17 03:17:13,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:17:13,470 INFO L276 IsEmpty]: Start isEmpty. Operand 2773 states and 4176 transitions. [2021-12-17 03:17:13,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-12-17 03:17:13,473 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:17:13,474 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, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:17:13,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-12-17 03:17:13,474 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:17:13,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:17:13,474 INFO L85 PathProgramCache]: Analyzing trace with hash 408295909, now seen corresponding path program 1 times [2021-12-17 03:17:13,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:17:13,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140077620] [2021-12-17 03:17:13,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:17:13,475 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:17:13,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:17:13,575 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 254 proven. 0 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-12-17 03:17:13,576 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:17:13,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140077620] [2021-12-17 03:17:13,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140077620] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:17:13,576 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:17:13,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:17:13,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051331052] [2021-12-17 03:17:13,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:17:13,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:17:13,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:17:13,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:17:13,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:17:13,577 INFO L87 Difference]: Start difference. First operand 2773 states and 4176 transitions. Second operand has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:17:14,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:17:14,021 INFO L93 Difference]: Finished difference Result 5761 states and 8636 transitions. [2021-12-17 03:17:14,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:17:14,023 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2021-12-17 03:17:14,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:17:14,028 INFO L225 Difference]: With dead ends: 5761 [2021-12-17 03:17:14,029 INFO L226 Difference]: Without dead ends: 3011 [2021-12-17 03:17:14,031 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 [2021-12-17 03:17:14,031 INFO L933 BasicCegarLoop]: 236 mSDtfsCounter, 49 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 578 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 03:17:14,031 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 578 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-17 03:17:14,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3011 states. [2021-12-17 03:17:14,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3011 to 2773. [2021-12-17 03:17:14,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2773 states, 2772 states have (on average 1.503968253968254) internal successors, (4169), 2772 states have internal predecessors, (4169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:17:14,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2773 states to 2773 states and 4169 transitions. [2021-12-17 03:17:14,075 INFO L78 Accepts]: Start accepts. Automaton has 2773 states and 4169 transitions. Word has length 195 [2021-12-17 03:17:14,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:17:14,076 INFO L470 AbstractCegarLoop]: Abstraction has 2773 states and 4169 transitions. [2021-12-17 03:17:14,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:17:14,076 INFO L276 IsEmpty]: Start isEmpty. Operand 2773 states and 4169 transitions. [2021-12-17 03:17:14,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2021-12-17 03:17:14,079 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:17:14,080 INFO L514 BasicCegarLoop]: trace histogram [6, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:17:14,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-12-17 03:17:14,081 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:17:14,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:17:14,081 INFO L85 PathProgramCache]: Analyzing trace with hash 2113515223, now seen corresponding path program 1 times [2021-12-17 03:17:14,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:17:14,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745205645] [2021-12-17 03:17:14,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:17:14,081 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:17:14,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:17:14,318 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 223 proven. 0 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-12-17 03:17:14,318 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:17:14,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745205645] [2021-12-17 03:17:14,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745205645] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:17:14,319 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:17:14,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 03:17:14,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998431969] [2021-12-17 03:17:14,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:17:14,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 03:17:14,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:17:14,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 03:17:14,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-17 03:17:14,321 INFO L87 Difference]: Start difference. First operand 2773 states and 4169 transitions. Second operand has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 7 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) [2021-12-17 03:17:17,182 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:17:18,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:17:18,496 INFO L93 Difference]: Finished difference Result 9977 states and 14849 transitions. [2021-12-17 03:17:18,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 03:17:18,497 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 7 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 202 [2021-12-17 03:17:18,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:17:18,521 INFO L225 Difference]: With dead ends: 9977 [2021-12-17 03:17:18,522 INFO L226 Difference]: Without dead ends: 7227 [2021-12-17 03:17:18,525 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-12-17 03:17:18,525 INFO L933 BasicCegarLoop]: 398 mSDtfsCounter, 796 mSDsluCounter, 927 mSDsCounter, 0 mSdLazyCounter, 983 mSolverCounterSat, 123 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 796 SdHoareTripleChecker+Valid, 1325 SdHoareTripleChecker+Invalid, 1107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 983 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2021-12-17 03:17:18,525 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [796 Valid, 1325 Invalid, 1107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 983 Invalid, 1 Unknown, 0 Unchecked, 4.0s Time] [2021-12-17 03:17:18,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7227 states. [2021-12-17 03:17:18,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7227 to 3879. [2021-12-17 03:17:18,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3879 states, 3878 states have (on average 1.5373904074265086) internal successors, (5962), 3878 states have internal predecessors, (5962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:17:18,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3879 states to 3879 states and 5962 transitions. [2021-12-17 03:17:18,587 INFO L78 Accepts]: Start accepts. Automaton has 3879 states and 5962 transitions. Word has length 202 [2021-12-17 03:17:18,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:17:18,588 INFO L470 AbstractCegarLoop]: Abstraction has 3879 states and 5962 transitions. [2021-12-17 03:17:18,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 7 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) [2021-12-17 03:17:18,588 INFO L276 IsEmpty]: Start isEmpty. Operand 3879 states and 5962 transitions. [2021-12-17 03:17:18,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2021-12-17 03:17:18,593 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:17:18,594 INFO L514 BasicCegarLoop]: trace histogram [6, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:17:18,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-12-17 03:17:18,594 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:17:18,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:17:18,594 INFO L85 PathProgramCache]: Analyzing trace with hash 379410773, now seen corresponding path program 1 times [2021-12-17 03:17:18,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:17:18,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835725017] [2021-12-17 03:17:18,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:17:18,595 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:17:18,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:17:18,816 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 223 proven. 0 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-12-17 03:17:18,817 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:17:18,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835725017] [2021-12-17 03:17:18,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835725017] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:17:18,817 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:17:18,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 03:17:18,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341004882] [2021-12-17 03:17:18,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:17:18,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 03:17:18,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:17:18,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 03:17:18,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-17 03:17:18,819 INFO L87 Difference]: Start difference. First operand 3879 states and 5962 transitions. Second operand has 8 states, 8 states have (on average 17.625) internal successors, (141), 8 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:17:20,083 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:17:21,830 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:17:23,179 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:17:24,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:17:24,182 INFO L93 Difference]: Finished difference Result 10634 states and 16090 transitions. [2021-12-17 03:17:24,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 03:17:24,183 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 17.625) internal successors, (141), 8 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 202 [2021-12-17 03:17:24,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:17:24,194 INFO L225 Difference]: With dead ends: 10634 [2021-12-17 03:17:24,194 INFO L226 Difference]: Without dead ends: 6778 [2021-12-17 03:17:24,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-12-17 03:17:24,199 INFO L933 BasicCegarLoop]: 317 mSDtfsCounter, 396 mSDsluCounter, 1321 mSDsCounter, 0 mSdLazyCounter, 1088 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 1638 SdHoareTripleChecker+Invalid, 1148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1088 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:17:24,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [396 Valid, 1638 Invalid, 1148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1088 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2021-12-17 03:17:24,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6778 states. [2021-12-17 03:17:24,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6778 to 3886. [2021-12-17 03:17:24,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3886 states, 3885 states have (on average 1.5364221364221364) internal successors, (5969), 3885 states have internal predecessors, (5969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:17:24,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3886 states to 3886 states and 5969 transitions. [2021-12-17 03:17:24,295 INFO L78 Accepts]: Start accepts. Automaton has 3886 states and 5969 transitions. Word has length 202 [2021-12-17 03:17:24,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:17:24,296 INFO L470 AbstractCegarLoop]: Abstraction has 3886 states and 5969 transitions. [2021-12-17 03:17:24,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.625) internal successors, (141), 8 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:17:24,296 INFO L276 IsEmpty]: Start isEmpty. Operand 3886 states and 5969 transitions. [2021-12-17 03:17:24,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2021-12-17 03:17:24,301 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:17:24,302 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:17:24,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-12-17 03:17:24,302 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:17:24,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:17:24,302 INFO L85 PathProgramCache]: Analyzing trace with hash 970434243, now seen corresponding path program 1 times [2021-12-17 03:17:24,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:17:24,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196749140] [2021-12-17 03:17:24,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:17:24,303 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:17:24,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:17:24,394 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 276 proven. 0 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-12-17 03:17:24,394 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:17:24,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196749140] [2021-12-17 03:17:24,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196749140] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:17:24,395 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:17:24,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:17:24,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310406338] [2021-12-17 03:17:24,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:17:24,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:17:24,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:17:24,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:17:24,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:17:24,396 INFO L87 Difference]: Start difference. First operand 3886 states and 5969 transitions. Second operand has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 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) [2021-12-17 03:17:25,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:17:25,626 INFO L93 Difference]: Finished difference Result 8273 states and 12630 transitions. [2021-12-17 03:17:25,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:17:25,626 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 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 213 [2021-12-17 03:17:25,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:17:25,632 INFO L225 Difference]: With dead ends: 8273 [2021-12-17 03:17:25,632 INFO L226 Difference]: Without dead ends: 4410 [2021-12-17 03:17:25,635 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 [2021-12-17 03:17:25,635 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 135 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:17:25,635 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 348 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-17 03:17:25,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4410 states. [2021-12-17 03:17:25,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4410 to 3886. [2021-12-17 03:17:25,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3886 states, 3885 states have (on average 1.522007722007722) internal successors, (5913), 3885 states have internal predecessors, (5913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:17:25,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3886 states to 3886 states and 5913 transitions. [2021-12-17 03:17:25,696 INFO L78 Accepts]: Start accepts. Automaton has 3886 states and 5913 transitions. Word has length 213 [2021-12-17 03:17:25,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:17:25,697 INFO L470 AbstractCegarLoop]: Abstraction has 3886 states and 5913 transitions. [2021-12-17 03:17:25,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 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) [2021-12-17 03:17:25,697 INFO L276 IsEmpty]: Start isEmpty. Operand 3886 states and 5913 transitions. [2021-12-17 03:17:25,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2021-12-17 03:17:25,701 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:17:25,702 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:17:25,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-12-17 03:17:25,702 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:17:25,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:17:25,702 INFO L85 PathProgramCache]: Analyzing trace with hash -1641380131, now seen corresponding path program 1 times [2021-12-17 03:17:25,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:17:25,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316885922] [2021-12-17 03:17:25,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:17:25,703 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:17:25,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:17:25,826 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 327 proven. 0 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-12-17 03:17:25,826 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:17:25,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316885922] [2021-12-17 03:17:25,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316885922] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:17:25,827 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:17:25,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:17:25,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596012525] [2021-12-17 03:17:25,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:17:25,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:17:25,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:17:25,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:17:25,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:17:25,828 INFO L87 Difference]: Start difference. First operand 3886 states and 5913 transitions. Second operand has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:17:26,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:17:26,388 INFO L93 Difference]: Finished difference Result 8273 states and 12518 transitions. [2021-12-17 03:17:26,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:17:26,388 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 217 [2021-12-17 03:17:26,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:17:26,394 INFO L225 Difference]: With dead ends: 8273 [2021-12-17 03:17:26,394 INFO L226 Difference]: Without dead ends: 4410 [2021-12-17 03:17:26,397 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 [2021-12-17 03:17:26,398 INFO L933 BasicCegarLoop]: 148 mSDtfsCounter, 127 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 03:17:26,398 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 395 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 03:17:26,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4410 states. [2021-12-17 03:17:26,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4410 to 3886. [2021-12-17 03:17:26,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3886 states, 3885 states have (on average 1.5039897039897039) internal successors, (5843), 3885 states have internal predecessors, (5843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:17:26,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3886 states to 3886 states and 5843 transitions. [2021-12-17 03:17:26,496 INFO L78 Accepts]: Start accepts. Automaton has 3886 states and 5843 transitions. Word has length 217 [2021-12-17 03:17:26,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:17:26,497 INFO L470 AbstractCegarLoop]: Abstraction has 3886 states and 5843 transitions. [2021-12-17 03:17:26,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:17:26,497 INFO L276 IsEmpty]: Start isEmpty. Operand 3886 states and 5843 transitions. [2021-12-17 03:17:26,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2021-12-17 03:17:26,501 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:17:26,501 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:17:26,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-12-17 03:17:26,502 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:17:26,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:17:26,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1313713399, now seen corresponding path program 1 times [2021-12-17 03:17:26,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:17:26,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365571408] [2021-12-17 03:17:26,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:17:26,503 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:17:26,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:17:26,590 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 335 proven. 0 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-12-17 03:17:26,590 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:17:26,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365571408] [2021-12-17 03:17:26,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365571408] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:17:26,591 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:17:26,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:17:26,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199957316] [2021-12-17 03:17:26,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:17:26,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:17:26,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:17:26,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:17:26,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:17:26,592 INFO L87 Difference]: Start difference. First operand 3886 states and 5843 transitions. Second operand has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:17:27,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:17:27,605 INFO L93 Difference]: Finished difference Result 8273 states and 12378 transitions. [2021-12-17 03:17:27,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:17:27,606 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 217 [2021-12-17 03:17:27,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:17:27,612 INFO L225 Difference]: With dead ends: 8273 [2021-12-17 03:17:27,612 INFO L226 Difference]: Without dead ends: 4410 [2021-12-17 03:17:27,614 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 [2021-12-17 03:17:27,615 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 125 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-17 03:17:27,616 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 360 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-17 03:17:27,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4410 states. [2021-12-17 03:17:27,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4410 to 3886. [2021-12-17 03:17:27,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3886 states, 3885 states have (on average 1.4895752895752896) internal successors, (5787), 3885 states have internal predecessors, (5787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:17:27,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3886 states to 3886 states and 5787 transitions. [2021-12-17 03:17:27,678 INFO L78 Accepts]: Start accepts. Automaton has 3886 states and 5787 transitions. Word has length 217 [2021-12-17 03:17:27,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:17:27,679 INFO L470 AbstractCegarLoop]: Abstraction has 3886 states and 5787 transitions. [2021-12-17 03:17:27,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:17:27,679 INFO L276 IsEmpty]: Start isEmpty. Operand 3886 states and 5787 transitions. [2021-12-17 03:17:27,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2021-12-17 03:17:27,683 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:17:27,683 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:17:27,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-12-17 03:17:27,684 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:17:27,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:17:27,684 INFO L85 PathProgramCache]: Analyzing trace with hash 2105179815, now seen corresponding path program 1 times [2021-12-17 03:17:27,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:17:27,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094856070] [2021-12-17 03:17:27,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:17:27,685 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:17:27,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:17:27,779 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 332 proven. 0 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-12-17 03:17:27,780 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:17:27,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094856070] [2021-12-17 03:17:27,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094856070] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:17:27,780 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:17:27,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:17:27,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110542414] [2021-12-17 03:17:27,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:17:27,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:17:27,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:17:27,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:17:27,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:17:27,781 INFO L87 Difference]: Start difference. First operand 3886 states and 5787 transitions. Second operand has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:17:28,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:17:28,992 INFO L93 Difference]: Finished difference Result 8273 states and 12266 transitions. [2021-12-17 03:17:28,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:17:28,993 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 218 [2021-12-17 03:17:28,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:17:28,998 INFO L225 Difference]: With dead ends: 8273 [2021-12-17 03:17:28,999 INFO L226 Difference]: Without dead ends: 4410 [2021-12-17 03:17:29,002 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 [2021-12-17 03:17:29,003 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 126 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-17 03:17:29,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 348 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-17 03:17:29,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4410 states. [2021-12-17 03:17:29,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4410 to 3886. [2021-12-17 03:17:29,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3886 states, 3885 states have (on average 1.4715572715572716) internal successors, (5717), 3885 states have internal predecessors, (5717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:17:29,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3886 states to 3886 states and 5717 transitions. [2021-12-17 03:17:29,137 INFO L78 Accepts]: Start accepts. Automaton has 3886 states and 5717 transitions. Word has length 218 [2021-12-17 03:17:29,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:17:29,137 INFO L470 AbstractCegarLoop]: Abstraction has 3886 states and 5717 transitions. [2021-12-17 03:17:29,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:17:29,137 INFO L276 IsEmpty]: Start isEmpty. Operand 3886 states and 5717 transitions. [2021-12-17 03:17:29,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2021-12-17 03:17:29,141 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:17:29,141 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:17:29,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-12-17 03:17:29,141 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:17:29,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:17:29,142 INFO L85 PathProgramCache]: Analyzing trace with hash 940669811, now seen corresponding path program 1 times [2021-12-17 03:17:29,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:17:29,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250359484] [2021-12-17 03:17:29,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:17:29,142 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:17:29,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:17:29,234 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 339 proven. 0 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-12-17 03:17:29,235 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:17:29,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250359484] [2021-12-17 03:17:29,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250359484] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:17:29,235 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:17:29,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:17:29,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140652102] [2021-12-17 03:17:29,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:17:29,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:17:29,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:17:29,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:17:29,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:17:29,236 INFO L87 Difference]: Start difference. First operand 3886 states and 5717 transitions. Second operand has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:17:29,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:17:29,802 INFO L93 Difference]: Finished difference Result 7855 states and 11556 transitions. [2021-12-17 03:17:29,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:17:29,803 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 218 [2021-12-17 03:17:29,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:17:29,808 INFO L225 Difference]: With dead ends: 7855 [2021-12-17 03:17:29,808 INFO L226 Difference]: Without dead ends: 3992 [2021-12-17 03:17:29,811 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 [2021-12-17 03:17:29,812 INFO L933 BasicCegarLoop]: 218 mSDtfsCounter, 30 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 541 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 03:17:29,812 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 541 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 03:17:29,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3992 states. [2021-12-17 03:17:29,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3992 to 3886. [2021-12-17 03:17:29,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3886 states, 3885 states have (on average 1.4697554697554698) internal successors, (5710), 3885 states have internal predecessors, (5710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:17:29,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3886 states to 3886 states and 5710 transitions. [2021-12-17 03:17:29,905 INFO L78 Accepts]: Start accepts. Automaton has 3886 states and 5710 transitions. Word has length 218 [2021-12-17 03:17:29,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:17:29,906 INFO L470 AbstractCegarLoop]: Abstraction has 3886 states and 5710 transitions. [2021-12-17 03:17:29,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:17:29,906 INFO L276 IsEmpty]: Start isEmpty. Operand 3886 states and 5710 transitions. [2021-12-17 03:17:29,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2021-12-17 03:17:29,910 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:17:29,910 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 5, 5, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:17:29,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-12-17 03:17:29,912 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:17:29,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:17:29,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1779597780, now seen corresponding path program 1 times [2021-12-17 03:17:29,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:17:29,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907993858] [2021-12-17 03:17:29,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:17:29,913 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:17:29,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:17:30,021 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 324 proven. 0 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2021-12-17 03:17:30,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:17:30,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907993858] [2021-12-17 03:17:30,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907993858] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:17:30,022 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:17:30,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:17:30,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848321651] [2021-12-17 03:17:30,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:17:30,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:17:30,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:17:30,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:17:30,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:17:30,023 INFO L87 Difference]: Start difference. First operand 3886 states and 5710 transitions. Second operand has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:17:31,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:17:31,077 INFO L93 Difference]: Finished difference Result 8273 states and 12112 transitions. [2021-12-17 03:17:31,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:17:31,078 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 220 [2021-12-17 03:17:31,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:17:31,082 INFO L225 Difference]: With dead ends: 8273 [2021-12-17 03:17:31,082 INFO L226 Difference]: Without dead ends: 4410 [2021-12-17 03:17:31,084 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 [2021-12-17 03:17:31,084 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 110 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-17 03:17:31,084 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 352 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-17 03:17:31,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4410 states. [2021-12-17 03:17:31,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4410 to 3620. [2021-12-17 03:17:31,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3620 states, 3619 states have (on average 1.4655982315556784) internal successors, (5304), 3619 states have internal predecessors, (5304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:17:31,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3620 states to 3620 states and 5304 transitions. [2021-12-17 03:17:31,142 INFO L78 Accepts]: Start accepts. Automaton has 3620 states and 5304 transitions. Word has length 220 [2021-12-17 03:17:31,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:17:31,142 INFO L470 AbstractCegarLoop]: Abstraction has 3620 states and 5304 transitions. [2021-12-17 03:17:31,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:17:31,143 INFO L276 IsEmpty]: Start isEmpty. Operand 3620 states and 5304 transitions. [2021-12-17 03:17:31,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2021-12-17 03:17:31,147 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:17:31,147 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:17:31,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2021-12-17 03:17:31,147 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:17:31,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:17:31,148 INFO L85 PathProgramCache]: Analyzing trace with hash 638259024, now seen corresponding path program 1 times [2021-12-17 03:17:31,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:17:31,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197181606] [2021-12-17 03:17:31,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:17:31,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:17:31,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:17:31,398 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2021-12-17 03:17:31,399 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:17:31,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197181606] [2021-12-17 03:17:31,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197181606] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:17:31,399 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:17:31,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 03:17:31,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632678645] [2021-12-17 03:17:31,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:17:31,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 03:17:31,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:17:31,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 03:17:31,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:17:31,400 INFO L87 Difference]: Start difference. First operand 3620 states and 5304 transitions. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 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) [2021-12-17 03:17:32,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:17:32,640 INFO L93 Difference]: Finished difference Result 7237 states and 10604 transitions. [2021-12-17 03:17:32,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 03:17:32,641 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 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 230 [2021-12-17 03:17:32,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:17:32,645 INFO L225 Difference]: With dead ends: 7237 [2021-12-17 03:17:32,645 INFO L226 Difference]: Without dead ends: 3620 [2021-12-17 03:17:32,647 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-17 03:17:32,651 INFO L933 BasicCegarLoop]: 206 mSDtfsCounter, 7 mSDsluCounter, 465 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 671 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:17:32,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 671 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-17 03:17:32,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3620 states. [2021-12-17 03:17:32,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3620 to 3620. [2021-12-17 03:17:32,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3620 states, 3619 states have (on average 1.4653219121304228) internal successors, (5303), 3619 states have internal predecessors, (5303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:17:32,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3620 states to 3620 states and 5303 transitions. [2021-12-17 03:17:32,710 INFO L78 Accepts]: Start accepts. Automaton has 3620 states and 5303 transitions. Word has length 230 [2021-12-17 03:17:32,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:17:32,710 INFO L470 AbstractCegarLoop]: Abstraction has 3620 states and 5303 transitions. [2021-12-17 03:17:32,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 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) [2021-12-17 03:17:32,711 INFO L276 IsEmpty]: Start isEmpty. Operand 3620 states and 5303 transitions. [2021-12-17 03:17:32,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2021-12-17 03:17:32,715 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:17:32,715 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:17:32,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2021-12-17 03:17:32,715 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:17:32,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:17:32,716 INFO L85 PathProgramCache]: Analyzing trace with hash -2032488434, now seen corresponding path program 1 times [2021-12-17 03:17:32,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:17:32,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829814879] [2021-12-17 03:17:32,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:17:32,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:17:33,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:17:33,430 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 155 proven. 293 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-17 03:17:33,430 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:17:33,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829814879] [2021-12-17 03:17:33,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829814879] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 03:17:33,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335932330] [2021-12-17 03:17:33,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:17:33,430 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:17:33,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 03:17:33,435 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 03:17:33,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 03:17:34,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:17:34,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 1304 conjuncts, 189 conjunts are in the unsatisfiable core [2021-12-17 03:17:34,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 03:17:34,614 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 190816966 treesize of output 123633666 [2021-12-17 03:17:35,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:17:36,046 INFO L354 Elim1Store]: treesize reduction 520, result has 8.1 percent of original size [2021-12-17 03:17:36,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 494054204 treesize of output 494054223 [2021-12-17 03:17:51,323 WARN L227 SmtUtils]: Spent 15.27s on a formula simplification that was a NOOP. DAG size: 2105 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-17 03:18:06,216 WARN L227 SmtUtils]: Spent 14.88s on a formula simplification that was a NOOP. DAG size: 2093 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-17 03:18:12,963 INFO L244 Elim1Store]: Index analysis took 374 ms