./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/openssl/s3_srvr.blast.15.i.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c 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.15.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 4d1a05335dcd475270df3d2b7e447bf62801b1b41377a4a2d9fc94b2523fc1ec --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-11 23:55:57,307 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-11 23:55:57,320 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-11 23:55:57,357 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-11 23:55:57,358 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-11 23:55:57,359 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-11 23:55:57,361 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-11 23:55:57,362 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-11 23:55:57,366 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-11 23:55:57,369 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-11 23:55:57,370 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-11 23:55:57,372 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-11 23:55:57,372 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-11 23:55:57,373 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-11 23:55:57,374 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-11 23:55:57,376 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-11 23:55:57,377 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-11 23:55:57,378 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-11 23:55:57,379 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-11 23:55:57,383 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-11 23:55:57,389 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-11 23:55:57,390 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-11 23:55:57,390 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-11 23:55:57,391 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-11 23:55:57,392 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-11 23:55:57,397 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-11 23:55:57,397 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-11 23:55:57,398 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-11 23:55:57,398 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-11 23:55:57,399 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-11 23:55:57,400 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-11 23:55:57,400 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-11 23:55:57,401 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-11 23:55:57,401 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-11 23:55:57,402 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-11 23:55:57,402 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-11 23:55:57,403 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-11 23:55:57,404 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-11 23:55:57,404 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-11 23:55:57,404 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-11 23:55:57,404 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-11 23:55:57,406 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-11 23:55:57,406 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-11 23:55:57,429 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-11 23:55:57,429 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-11 23:55:57,430 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-11 23:55:57,430 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-11 23:55:57,430 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-11 23:55:57,431 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-11 23:55:57,431 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-11 23:55:57,431 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-11 23:55:57,431 INFO L138 SettingsManager]: * Use SBE=true [2022-07-11 23:55:57,432 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-11 23:55:57,432 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-11 23:55:57,432 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-11 23:55:57,433 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-11 23:55:57,433 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-11 23:55:57,433 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-11 23:55:57,433 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-11 23:55:57,433 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-11 23:55:57,433 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-11 23:55:57,433 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-11 23:55:57,433 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-11 23:55:57,434 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-11 23:55:57,434 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-11 23:55:57,434 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-11 23:55:57,434 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-11 23:55:57,434 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-11 23:55:57,434 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-11 23:55:57,434 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-11 23:55:57,435 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-11 23:55:57,435 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-11 23:55:57,435 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-11 23:55:57,435 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-11 23:55:57,435 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-11 23:55:57,436 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-11 23:55:57,436 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4d1a05335dcd475270df3d2b7e447bf62801b1b41377a4a2d9fc94b2523fc1ec [2022-07-11 23:55:57,625 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-11 23:55:57,641 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-11 23:55:57,642 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-11 23:55:57,643 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-11 23:55:57,644 INFO L275 PluginConnector]: CDTParser initialized [2022-07-11 23:55:57,645 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/openssl/s3_srvr.blast.15.i.cil-1.c [2022-07-11 23:55:57,690 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98bb03186/08f8a87fa78549dc80e0971605438164/FLAG71889790c [2022-07-11 23:55:58,138 INFO L306 CDTParser]: Found 1 translation units. [2022-07-11 23:55:58,146 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/openssl/s3_srvr.blast.15.i.cil-1.c [2022-07-11 23:55:58,171 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98bb03186/08f8a87fa78549dc80e0971605438164/FLAG71889790c [2022-07-11 23:55:58,183 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98bb03186/08f8a87fa78549dc80e0971605438164 [2022-07-11 23:55:58,185 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-11 23:55:58,186 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-11 23:55:58,187 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-11 23:55:58,187 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-11 23:55:58,189 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-11 23:55:58,190 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.07 11:55:58" (1/1) ... [2022-07-11 23:55:58,190 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@341678dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:55:58, skipping insertion in model container [2022-07-11 23:55:58,191 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.07 11:55:58" (1/1) ... [2022-07-11 23:55:58,195 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-11 23:55:58,237 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-11 23:55:58,501 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.15.i.cil-1.c[75550,75563] [2022-07-11 23:55:58,506 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-11 23:55:58,522 INFO L203 MainTranslator]: Completed pre-run [2022-07-11 23:55:58,627 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.15.i.cil-1.c[75550,75563] [2022-07-11 23:55:58,629 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-11 23:55:58,651 INFO L208 MainTranslator]: Completed translation [2022-07-11 23:55:58,657 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:55:58 WrapperNode [2022-07-11 23:55:58,657 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-11 23:55:58,658 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-11 23:55:58,659 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-11 23:55:58,659 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-11 23:55:58,664 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:55:58" (1/1) ... [2022-07-11 23:55:58,698 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:55:58" (1/1) ... [2022-07-11 23:55:58,746 INFO L137 Inliner]: procedures = 31, calls = 223, calls flagged for inlining = 7, calls inlined = 3, statements flattened = 799 [2022-07-11 23:55:58,746 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-11 23:55:58,747 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-11 23:55:58,747 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-11 23:55:58,747 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-11 23:55:58,757 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:55:58" (1/1) ... [2022-07-11 23:55:58,758 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:55:58" (1/1) ... [2022-07-11 23:55:58,765 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:55:58" (1/1) ... [2022-07-11 23:55:58,769 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:55:58" (1/1) ... [2022-07-11 23:55:58,803 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:55:58" (1/1) ... [2022-07-11 23:55:58,821 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:55:58" (1/1) ... [2022-07-11 23:55:58,824 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:55:58" (1/1) ... [2022-07-11 23:55:58,831 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-11 23:55:58,833 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-11 23:55:58,834 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-11 23:55:58,835 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-11 23:55:58,835 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:55:58" (1/1) ... [2022-07-11 23:55:58,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-11 23:55:58,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:55:58,857 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) [2022-07-11 23:55:58,867 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 [2022-07-11 23:55:58,885 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-11 23:55:58,885 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-11 23:55:58,885 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-11 23:55:58,885 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-11 23:55:58,885 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-11 23:55:58,886 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-11 23:55:58,886 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-11 23:55:58,886 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-11 23:55:58,886 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-11 23:55:59,011 INFO L234 CfgBuilder]: Building ICFG [2022-07-11 23:55:59,013 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-11 23:55:59,024 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-11 23:56:00,001 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2022-07-11 23:56:00,001 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2022-07-11 23:56:00,001 INFO L275 CfgBuilder]: Performing block encoding [2022-07-11 23:56:00,006 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-11 23:56:00,007 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-11 23:56:00,008 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.07 11:56:00 BoogieIcfgContainer [2022-07-11 23:56:00,009 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-11 23:56:00,010 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-11 23:56:00,010 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-11 23:56:00,012 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-11 23:56:00,013 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.07 11:55:58" (1/3) ... [2022-07-11 23:56:00,013 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@519f4ffc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.07 11:56:00, skipping insertion in model container [2022-07-11 23:56:00,013 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:55:58" (2/3) ... [2022-07-11 23:56:00,014 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@519f4ffc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.07 11:56:00, skipping insertion in model container [2022-07-11 23:56:00,014 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.07 11:56:00" (3/3) ... [2022-07-11 23:56:00,015 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.15.i.cil-1.c [2022-07-11 23:56:00,025 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-11 23:56:00,025 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-11 23:56:00,076 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-11 23:56:00,091 INFO L357 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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@32414007, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@51033bdc [2022-07-11 23:56:00,091 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-11 23:56:00,096 INFO L276 IsEmpty]: Start isEmpty. Operand has 153 states, 151 states have (on average 1.7218543046357615) internal successors, (260), 152 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:00,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-11 23:56:00,105 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:56:00,106 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:56:00,106 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:56:00,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:56:00,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1630857892, now seen corresponding path program 1 times [2022-07-11 23:56:00,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:56:00,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957517208] [2022-07-11 23:56:00,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:56:00,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:56:00,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:56:00,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:56:00,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:56:00,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957517208] [2022-07-11 23:56:00,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957517208] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:56:00,594 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:56:00,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:56:00,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048873211] [2022-07-11 23:56:00,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:56:00,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:56:00,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:56:00,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:56:00,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:56:00,625 INFO L87 Difference]: Start difference. First operand has 153 states, 151 states have (on average 1.7218543046357615) internal successors, (260), 152 states have internal predecessors, (260), 0 states have call successors, (0), 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 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:02,113 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:56:02,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:56:02,548 INFO L93 Difference]: Finished difference Result 428 states and 730 transitions. [2022-07-11 23:56:02,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:56:02,552 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2022-07-11 23:56:02,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:56:02,562 INFO L225 Difference]: With dead ends: 428 [2022-07-11 23:56:02,567 INFO L226 Difference]: Without dead ends: 260 [2022-07-11 23:56:02,569 INFO L412 NwaCegarLoop]: 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 [2022-07-11 23:56:02,575 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 158 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-07-11 23:56:02,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 459 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-07-11 23:56:02,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-07-11 23:56:02,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 180. [2022-07-11 23:56:02,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 1.6145251396648044) internal successors, (289), 179 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:02,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 289 transitions. [2022-07-11 23:56:02,609 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 289 transitions. Word has length 45 [2022-07-11 23:56:02,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:56:02,609 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 289 transitions. [2022-07-11 23:56:02,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:02,610 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 289 transitions. [2022-07-11 23:56:02,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-11 23:56:02,611 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:56:02,611 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:56:02,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-11 23:56:02,612 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:56:02,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:56:02,612 INFO L85 PathProgramCache]: Analyzing trace with hash -996579429, now seen corresponding path program 1 times [2022-07-11 23:56:02,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:56:02,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287030405] [2022-07-11 23:56:02,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:56:02,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:56:02,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:56:02,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:56:02,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:56:02,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287030405] [2022-07-11 23:56:02,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287030405] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:56:02,738 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:56:02,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:56:02,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976392189] [2022-07-11 23:56:02,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:56:02,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:56:02,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:56:02,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:56:02,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:56:02,742 INFO L87 Difference]: Start difference. First operand 180 states and 289 transitions. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:04,544 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 [] [2022-07-11 23:56:04,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:56:04,773 INFO L93 Difference]: Finished difference Result 378 states and 605 transitions. [2022-07-11 23:56:04,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:56:04,774 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-07-11 23:56:04,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:56:04,775 INFO L225 Difference]: With dead ends: 378 [2022-07-11 23:56:04,775 INFO L226 Difference]: Without dead ends: 208 [2022-07-11 23:56:04,776 INFO L412 NwaCegarLoop]: 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 [2022-07-11 23:56:04,776 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 22 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-11 23:56:04,777 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 487 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-07-11 23:56:04,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-07-11 23:56:04,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 191. [2022-07-11 23:56:04,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.6210526315789473) internal successors, (308), 190 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:04,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 308 transitions. [2022-07-11 23:56:04,786 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 308 transitions. Word has length 46 [2022-07-11 23:56:04,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:56:04,786 INFO L495 AbstractCegarLoop]: Abstraction has 191 states and 308 transitions. [2022-07-11 23:56:04,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:04,786 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 308 transitions. [2022-07-11 23:56:04,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-11 23:56:04,788 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:56:04,788 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:56:04,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-11 23:56:04,788 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:56:04,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:56:04,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1576915235, now seen corresponding path program 1 times [2022-07-11 23:56:04,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:56:04,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801576424] [2022-07-11 23:56:04,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:56:04,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:56:04,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:56:04,922 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:56:04,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:56:04,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801576424] [2022-07-11 23:56:04,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801576424] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:56:04,923 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:56:04,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:56:04,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066469633] [2022-07-11 23:56:04,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:56:04,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:56:04,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:56:04,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:56:04,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:56:04,926 INFO L87 Difference]: Start difference. First operand 191 states and 308 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:06,496 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:56:06,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:56:06,832 INFO L93 Difference]: Finished difference Result 519 states and 841 transitions. [2022-07-11 23:56:06,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:56:06,833 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-07-11 23:56:06,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:56:06,835 INFO L225 Difference]: With dead ends: 519 [2022-07-11 23:56:06,835 INFO L226 Difference]: Without dead ends: 349 [2022-07-11 23:56:06,835 INFO L412 NwaCegarLoop]: 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 [2022-07-11 23:56:06,836 INFO L413 NwaCegarLoop]: 267 mSDtfsCounter, 147 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 640 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-07-11 23:56:06,836 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 640 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-07-11 23:56:06,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2022-07-11 23:56:06,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 223. [2022-07-11 23:56:06,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 1.617117117117117) internal successors, (359), 222 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:06,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 359 transitions. [2022-07-11 23:56:06,845 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 359 transitions. Word has length 59 [2022-07-11 23:56:06,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:56:06,846 INFO L495 AbstractCegarLoop]: Abstraction has 223 states and 359 transitions. [2022-07-11 23:56:06,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:06,846 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 359 transitions. [2022-07-11 23:56:06,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-11 23:56:06,847 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:56:06,847 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:56:06,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-11 23:56:06,848 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:56:06,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:56:06,848 INFO L85 PathProgramCache]: Analyzing trace with hash -791759566, now seen corresponding path program 1 times [2022-07-11 23:56:06,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:56:06,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315461247] [2022-07-11 23:56:06,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:56:06,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:56:06,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:56:06,926 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:56:06,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:56:06,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315461247] [2022-07-11 23:56:06,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315461247] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:56:06,927 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:56:06,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:56:06,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871964589] [2022-07-11 23:56:06,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:56:06,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:56:06,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:56:06,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:56:06,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:56:06,929 INFO L87 Difference]: Start difference. First operand 223 states and 359 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:08,551 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:56:08,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:56:08,748 INFO L93 Difference]: Finished difference Result 441 states and 706 transitions. [2022-07-11 23:56:08,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:56:08,748 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2022-07-11 23:56:08,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:56:08,749 INFO L225 Difference]: With dead ends: 441 [2022-07-11 23:56:08,750 INFO L226 Difference]: Without dead ends: 239 [2022-07-11 23:56:08,750 INFO L412 NwaCegarLoop]: 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 [2022-07-11 23:56:08,751 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 28 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 491 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-11 23:56:08,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 491 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-07-11 23:56:08,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-07-11 23:56:08,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 223. [2022-07-11 23:56:08,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 1.6126126126126126) internal successors, (358), 222 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:08,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 358 transitions. [2022-07-11 23:56:08,758 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 358 transitions. Word has length 60 [2022-07-11 23:56:08,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:56:08,758 INFO L495 AbstractCegarLoop]: Abstraction has 223 states and 358 transitions. [2022-07-11 23:56:08,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:08,758 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 358 transitions. [2022-07-11 23:56:08,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-11 23:56:08,759 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:56:08,760 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:56:08,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-11 23:56:08,760 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:56:08,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:56:08,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1867672350, now seen corresponding path program 1 times [2022-07-11 23:56:08,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:56:08,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078809749] [2022-07-11 23:56:08,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:56:08,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:56:08,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:56:08,841 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:56:08,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:56:08,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078809749] [2022-07-11 23:56:08,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078809749] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:56:08,842 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:56:08,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:56:08,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690895556] [2022-07-11 23:56:08,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:56:08,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:56:08,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:56:08,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:56:08,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:56:08,843 INFO L87 Difference]: Start difference. First operand 223 states and 358 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:09,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:56:09,882 INFO L93 Difference]: Finished difference Result 441 states and 705 transitions. [2022-07-11 23:56:09,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:56:09,883 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2022-07-11 23:56:09,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:56:09,884 INFO L225 Difference]: With dead ends: 441 [2022-07-11 23:56:09,885 INFO L226 Difference]: Without dead ends: 239 [2022-07-11 23:56:09,885 INFO L412 NwaCegarLoop]: 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 [2022-07-11 23:56:09,886 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 26 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 491 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-11 23:56:09,886 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 491 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-11 23:56:09,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-07-11 23:56:09,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 223. [2022-07-11 23:56:09,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 1.6081081081081081) internal successors, (357), 222 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:09,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 357 transitions. [2022-07-11 23:56:09,891 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 357 transitions. Word has length 60 [2022-07-11 23:56:09,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:56:09,892 INFO L495 AbstractCegarLoop]: Abstraction has 223 states and 357 transitions. [2022-07-11 23:56:09,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:09,892 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 357 transitions. [2022-07-11 23:56:09,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-11 23:56:09,893 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:56:09,893 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:56:09,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-11 23:56:09,894 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:56:09,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:56:09,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1221856039, now seen corresponding path program 1 times [2022-07-11 23:56:09,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:56:09,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884311874] [2022-07-11 23:56:09,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:56:09,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:56:09,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:56:09,998 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:56:09,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:56:09,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884311874] [2022-07-11 23:56:09,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884311874] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:56:09,999 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:56:09,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:56:10,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567042790] [2022-07-11 23:56:10,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:56:10,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:56:10,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:56:10,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:56:10,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:56:10,002 INFO L87 Difference]: Start difference. First operand 223 states and 357 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:11,624 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:56:11,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:56:11,817 INFO L93 Difference]: Finished difference Result 440 states and 703 transitions. [2022-07-11 23:56:11,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:56:11,818 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2022-07-11 23:56:11,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:56:11,819 INFO L225 Difference]: With dead ends: 440 [2022-07-11 23:56:11,819 INFO L226 Difference]: Without dead ends: 238 [2022-07-11 23:56:11,819 INFO L412 NwaCegarLoop]: 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 [2022-07-11 23:56:11,820 INFO L413 NwaCegarLoop]: 193 mSDtfsCounter, 19 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-11 23:56:11,820 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 493 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-07-11 23:56:11,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2022-07-11 23:56:11,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 223. [2022-07-11 23:56:11,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 1.6036036036036037) internal successors, (356), 222 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:11,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 356 transitions. [2022-07-11 23:56:11,825 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 356 transitions. Word has length 60 [2022-07-11 23:56:11,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:56:11,825 INFO L495 AbstractCegarLoop]: Abstraction has 223 states and 356 transitions. [2022-07-11 23:56:11,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:11,826 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 356 transitions. [2022-07-11 23:56:11,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-11 23:56:11,826 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:56:11,826 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:56:11,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-11 23:56:11,827 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:56:11,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:56:11,827 INFO L85 PathProgramCache]: Analyzing trace with hash -748430745, now seen corresponding path program 1 times [2022-07-11 23:56:11,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:56:11,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131742544] [2022-07-11 23:56:11,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:56:11,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:56:11,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:56:11,937 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:56:11,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:56:11,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131742544] [2022-07-11 23:56:11,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131742544] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:56:11,938 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:56:11,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:56:11,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388725935] [2022-07-11 23:56:11,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:56:11,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:56:11,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:56:11,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:56:11,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:56:11,939 INFO L87 Difference]: Start difference. First operand 223 states and 356 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:12,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:56:12,424 INFO L93 Difference]: Finished difference Result 528 states and 842 transitions. [2022-07-11 23:56:12,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:56:12,425 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2022-07-11 23:56:12,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:56:12,426 INFO L225 Difference]: With dead ends: 528 [2022-07-11 23:56:12,426 INFO L226 Difference]: Without dead ends: 326 [2022-07-11 23:56:12,426 INFO L412 NwaCegarLoop]: 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 [2022-07-11 23:56:12,427 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 146 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-11 23:56:12,427 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 350 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-11 23:56:12,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-07-11 23:56:12,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 224. [2022-07-11 23:56:12,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 1.5919282511210762) internal successors, (355), 223 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:12,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 355 transitions. [2022-07-11 23:56:12,432 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 355 transitions. Word has length 60 [2022-07-11 23:56:12,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:56:12,432 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 355 transitions. [2022-07-11 23:56:12,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:12,432 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 355 transitions. [2022-07-11 23:56:12,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-07-11 23:56:12,432 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:56:12,432 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:56:12,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-11 23:56:12,433 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:56:12,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:56:12,433 INFO L85 PathProgramCache]: Analyzing trace with hash -399299686, now seen corresponding path program 1 times [2022-07-11 23:56:12,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:56:12,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066828486] [2022-07-11 23:56:12,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:56:12,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:56:12,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:56:12,500 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:56:12,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:56:12,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066828486] [2022-07-11 23:56:12,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066828486] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:56:12,501 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:56:12,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:56:12,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713852677] [2022-07-11 23:56:12,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:56:12,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:56:12,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:56:12,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:56:12,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:56:12,502 INFO L87 Difference]: Start difference. First operand 224 states and 355 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:13,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:56:13,530 INFO L93 Difference]: Finished difference Result 440 states and 699 transitions. [2022-07-11 23:56:13,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:56:13,533 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2022-07-11 23:56:13,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:56:13,534 INFO L225 Difference]: With dead ends: 440 [2022-07-11 23:56:13,534 INFO L226 Difference]: Without dead ends: 237 [2022-07-11 23:56:13,534 INFO L412 NwaCegarLoop]: 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 [2022-07-11 23:56:13,535 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 22 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-11 23:56:13,535 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 497 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-11 23:56:13,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-07-11 23:56:13,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 224. [2022-07-11 23:56:13,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 1.5874439461883407) internal successors, (354), 223 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:13,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 354 transitions. [2022-07-11 23:56:13,539 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 354 transitions. Word has length 61 [2022-07-11 23:56:13,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:56:13,539 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 354 transitions. [2022-07-11 23:56:13,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:13,539 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 354 transitions. [2022-07-11 23:56:13,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-11 23:56:13,540 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:56:13,540 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:56:13,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-11 23:56:13,540 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:56:13,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:56:13,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1403018247, now seen corresponding path program 1 times [2022-07-11 23:56:13,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:56:13,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254783257] [2022-07-11 23:56:13,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:56:13,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:56:13,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:56:13,637 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:56:13,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:56:13,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254783257] [2022-07-11 23:56:13,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254783257] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:56:13,638 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:56:13,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:56:13,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665217043] [2022-07-11 23:56:13,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:56:13,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:56:13,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:56:13,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:56:13,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:56:13,640 INFO L87 Difference]: Start difference. First operand 224 states and 354 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:15,645 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 [] [2022-07-11 23:56:15,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:56:15,871 INFO L93 Difference]: Finished difference Result 440 states and 698 transitions. [2022-07-11 23:56:15,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:56:15,871 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2022-07-11 23:56:15,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:56:15,872 INFO L225 Difference]: With dead ends: 440 [2022-07-11 23:56:15,872 INFO L226 Difference]: Without dead ends: 237 [2022-07-11 23:56:15,873 INFO L412 NwaCegarLoop]: 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 [2022-07-11 23:56:15,873 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 20 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-11 23:56:15,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 497 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 140 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-11 23:56:15,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-07-11 23:56:15,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 224. [2022-07-11 23:56:15,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 1.5829596412556053) internal successors, (353), 223 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:15,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 353 transitions. [2022-07-11 23:56:15,878 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 353 transitions. Word has length 62 [2022-07-11 23:56:15,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:56:15,878 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 353 transitions. [2022-07-11 23:56:15,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:15,878 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 353 transitions. [2022-07-11 23:56:15,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-11 23:56:15,878 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:56:15,879 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:56:15,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-11 23:56:15,879 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:56:15,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:56:15,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1900584747, now seen corresponding path program 1 times [2022-07-11 23:56:15,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:56:15,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072019334] [2022-07-11 23:56:15,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:56:15,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:56:15,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:56:15,951 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:56:15,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:56:15,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072019334] [2022-07-11 23:56:15,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072019334] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:56:15,952 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:56:15,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:56:15,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459959979] [2022-07-11 23:56:15,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:56:15,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:56:15,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:56:15,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:56:15,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:56:15,953 INFO L87 Difference]: Start difference. First operand 224 states and 353 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:17,370 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:56:17,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:56:17,524 INFO L93 Difference]: Finished difference Result 430 states and 684 transitions. [2022-07-11 23:56:17,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:56:17,525 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-07-11 23:56:17,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:56:17,525 INFO L225 Difference]: With dead ends: 430 [2022-07-11 23:56:17,525 INFO L226 Difference]: Without dead ends: 227 [2022-07-11 23:56:17,526 INFO L412 NwaCegarLoop]: 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 [2022-07-11 23:56:17,526 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 11 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-11 23:56:17,526 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 511 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-11 23:56:17,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-07-11 23:56:17,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 224. [2022-07-11 23:56:17,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 1.5784753363228698) internal successors, (352), 223 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:17,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 352 transitions. [2022-07-11 23:56:17,530 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 352 transitions. Word has length 63 [2022-07-11 23:56:17,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:56:17,530 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 352 transitions. [2022-07-11 23:56:17,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:17,531 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 352 transitions. [2022-07-11 23:56:17,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-11 23:56:17,531 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:56:17,531 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:56:17,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-11 23:56:17,531 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:56:17,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:56:17,531 INFO L85 PathProgramCache]: Analyzing trace with hash 606175341, now seen corresponding path program 1 times [2022-07-11 23:56:17,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:56:17,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698708514] [2022-07-11 23:56:17,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:56:17,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:56:17,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:56:17,605 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:56:17,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:56:17,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698708514] [2022-07-11 23:56:17,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698708514] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:56:17,606 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:56:17,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:56:17,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417169051] [2022-07-11 23:56:17,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:56:17,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:56:17,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:56:17,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:56:17,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:56:17,608 INFO L87 Difference]: Start difference. First operand 224 states and 352 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:18,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:56:18,323 INFO L93 Difference]: Finished difference Result 529 states and 836 transitions. [2022-07-11 23:56:18,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:56:18,324 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-07-11 23:56:18,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:56:18,325 INFO L225 Difference]: With dead ends: 529 [2022-07-11 23:56:18,325 INFO L226 Difference]: Without dead ends: 326 [2022-07-11 23:56:18,325 INFO L412 NwaCegarLoop]: 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 [2022-07-11 23:56:18,326 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 123 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-11 23:56:18,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 372 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-11 23:56:18,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-07-11 23:56:18,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 247. [2022-07-11 23:56:18,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 1.613821138211382) internal successors, (397), 246 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:18,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 397 transitions. [2022-07-11 23:56:18,330 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 397 transitions. Word has length 63 [2022-07-11 23:56:18,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:56:18,330 INFO L495 AbstractCegarLoop]: Abstraction has 247 states and 397 transitions. [2022-07-11 23:56:18,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:18,331 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 397 transitions. [2022-07-11 23:56:18,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-11 23:56:18,332 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:56:18,332 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:56:18,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-11 23:56:18,333 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:56:18,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:56:18,333 INFO L85 PathProgramCache]: Analyzing trace with hash 604314113, now seen corresponding path program 1 times [2022-07-11 23:56:18,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:56:18,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570469293] [2022-07-11 23:56:18,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:56:18,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:56:18,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:56:18,431 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:56:18,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:56:18,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570469293] [2022-07-11 23:56:18,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570469293] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:56:18,433 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:56:18,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:56:18,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346495933] [2022-07-11 23:56:18,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:56:18,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:56:18,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:56:18,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:56:18,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:56:18,434 INFO L87 Difference]: Start difference. First operand 247 states and 397 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) [2022-07-11 23:56:19,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:56:19,255 INFO L93 Difference]: Finished difference Result 628 states and 1018 transitions. [2022-07-11 23:56:19,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:56:19,256 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 91 [2022-07-11 23:56:19,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:56:19,258 INFO L225 Difference]: With dead ends: 628 [2022-07-11 23:56:19,258 INFO L226 Difference]: Without dead ends: 402 [2022-07-11 23:56:19,259 INFO L412 NwaCegarLoop]: 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 [2022-07-11 23:56:19,259 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 129 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-11 23:56:19,260 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 360 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-11 23:56:19,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2022-07-11 23:56:19,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 311. [2022-07-11 23:56:19,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 1.6419354838709677) internal successors, (509), 310 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:19,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 509 transitions. [2022-07-11 23:56:19,266 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 509 transitions. Word has length 91 [2022-07-11 23:56:19,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:56:19,267 INFO L495 AbstractCegarLoop]: Abstraction has 311 states and 509 transitions. [2022-07-11 23:56:19,267 INFO L496 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) [2022-07-11 23:56:19,267 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 509 transitions. [2022-07-11 23:56:19,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-07-11 23:56:19,268 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:56:19,268 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:56:19,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-11 23:56:19,269 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:56:19,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:56:19,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1582109900, now seen corresponding path program 1 times [2022-07-11 23:56:19,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:56:19,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926015358] [2022-07-11 23:56:19,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:56:19,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:56:19,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:56:19,379 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:56:19,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:56:19,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926015358] [2022-07-11 23:56:19,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926015358] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:56:19,379 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:56:19,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:56:19,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673497274] [2022-07-11 23:56:19,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:56:19,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:56:19,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:56:19,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:56:19,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:56:19,381 INFO L87 Difference]: Start difference. First operand 311 states and 509 transitions. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:21,386 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 [] [2022-07-11 23:56:21,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:56:21,681 INFO L93 Difference]: Finished difference Result 720 states and 1174 transitions. [2022-07-11 23:56:21,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:56:21,682 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2022-07-11 23:56:21,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:56:21,683 INFO L225 Difference]: With dead ends: 720 [2022-07-11 23:56:21,683 INFO L226 Difference]: Without dead ends: 430 [2022-07-11 23:56:21,683 INFO L412 NwaCegarLoop]: 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 [2022-07-11 23:56:21,684 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 125 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 60 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-11 23:56:21,684 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 348 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 262 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-11 23:56:21,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2022-07-11 23:56:21,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 348. [2022-07-11 23:56:21,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 1.6512968299711817) internal successors, (573), 347 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:21,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 573 transitions. [2022-07-11 23:56:21,690 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 573 transitions. Word has length 96 [2022-07-11 23:56:21,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:56:21,690 INFO L495 AbstractCegarLoop]: Abstraction has 348 states and 573 transitions. [2022-07-11 23:56:21,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:21,690 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 573 transitions. [2022-07-11 23:56:21,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-07-11 23:56:21,691 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:56:21,691 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:56:21,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-11 23:56:21,691 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:56:21,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:56:21,692 INFO L85 PathProgramCache]: Analyzing trace with hash 940385999, now seen corresponding path program 1 times [2022-07-11 23:56:21,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:56:21,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530889704] [2022-07-11 23:56:21,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:56:21,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:56:21,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:56:21,763 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-11 23:56:21,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:56:21,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530889704] [2022-07-11 23:56:21,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530889704] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:56:21,764 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:56:21,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:56:21,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925379364] [2022-07-11 23:56:21,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:56:21,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:56:21,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:56:21,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:56:21,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:56:21,765 INFO L87 Difference]: Start difference. First operand 348 states and 573 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 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) [2022-07-11 23:56:22,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:56:22,672 INFO L93 Difference]: Finished difference Result 716 states and 1183 transitions. [2022-07-11 23:56:22,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:56:22,673 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 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 97 [2022-07-11 23:56:22,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:56:22,674 INFO L225 Difference]: With dead ends: 716 [2022-07-11 23:56:22,674 INFO L226 Difference]: Without dead ends: 389 [2022-07-11 23:56:22,674 INFO L412 NwaCegarLoop]: 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 [2022-07-11 23:56:22,675 INFO L413 NwaCegarLoop]: 200 mSDtfsCounter, 32 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-11 23:56:22,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 513 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-11 23:56:22,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2022-07-11 23:56:22,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 370. [2022-07-11 23:56:22,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 369 states have (on average 1.6504065040650406) internal successors, (609), 369 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:22,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 609 transitions. [2022-07-11 23:56:22,681 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 609 transitions. Word has length 97 [2022-07-11 23:56:22,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:56:22,681 INFO L495 AbstractCegarLoop]: Abstraction has 370 states and 609 transitions. [2022-07-11 23:56:22,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 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) [2022-07-11 23:56:22,681 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 609 transitions. [2022-07-11 23:56:22,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-07-11 23:56:22,682 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:56:22,682 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:56:22,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-11 23:56:22,683 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:56:22,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:56:22,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1511085862, now seen corresponding path program 1 times [2022-07-11 23:56:22,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:56:22,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245767239] [2022-07-11 23:56:22,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:56:22,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:56:22,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:56:22,756 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-11 23:56:22,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:56:22,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245767239] [2022-07-11 23:56:22,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245767239] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:56:22,756 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:56:22,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:56:22,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679112461] [2022-07-11 23:56:22,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:56:22,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:56:22,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:56:22,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:56:22,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:56:22,758 INFO L87 Difference]: Start difference. First operand 370 states and 609 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:23,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:56:23,554 INFO L93 Difference]: Finished difference Result 737 states and 1217 transitions. [2022-07-11 23:56:23,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:56:23,555 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2022-07-11 23:56:23,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:56:23,556 INFO L225 Difference]: With dead ends: 737 [2022-07-11 23:56:23,556 INFO L226 Difference]: Without dead ends: 388 [2022-07-11 23:56:23,557 INFO L412 NwaCegarLoop]: 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 [2022-07-11 23:56:23,557 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 42 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 515 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-11 23:56:23,557 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 515 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-11 23:56:23,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2022-07-11 23:56:23,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 370. [2022-07-11 23:56:23,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 369 states have (on average 1.6476964769647697) internal successors, (608), 369 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:23,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 608 transitions. [2022-07-11 23:56:23,562 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 608 transitions. Word has length 111 [2022-07-11 23:56:23,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:56:23,563 INFO L495 AbstractCegarLoop]: Abstraction has 370 states and 608 transitions. [2022-07-11 23:56:23,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:23,563 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 608 transitions. [2022-07-11 23:56:23,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-07-11 23:56:23,566 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:56:23,566 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:56:23,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-11 23:56:23,566 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:56:23,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:56:23,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1489464814, now seen corresponding path program 1 times [2022-07-11 23:56:23,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:56:23,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937277020] [2022-07-11 23:56:23,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:56:23,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:56:23,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:56:23,643 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-11 23:56:23,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:56:23,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937277020] [2022-07-11 23:56:23,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937277020] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:56:23,645 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:56:23,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:56:23,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575550184] [2022-07-11 23:56:23,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:56:23,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:56:23,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:56:23,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:56:23,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:56:23,646 INFO L87 Difference]: Start difference. First operand 370 states and 608 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:25,383 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:56:25,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:56:25,672 INFO L93 Difference]: Finished difference Result 798 states and 1302 transitions. [2022-07-11 23:56:25,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:56:25,672 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2022-07-11 23:56:25,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:56:25,684 INFO L225 Difference]: With dead ends: 798 [2022-07-11 23:56:25,684 INFO L226 Difference]: Without dead ends: 449 [2022-07-11 23:56:25,685 INFO L412 NwaCegarLoop]: 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 [2022-07-11 23:56:25,685 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 150 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-11 23:56:25,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 348 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-07-11 23:56:25,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2022-07-11 23:56:25,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 370. [2022-07-11 23:56:25,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 369 states have (on average 1.6287262872628727) internal successors, (601), 369 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:25,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 601 transitions. [2022-07-11 23:56:25,692 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 601 transitions. Word has length 111 [2022-07-11 23:56:25,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:56:25,692 INFO L495 AbstractCegarLoop]: Abstraction has 370 states and 601 transitions. [2022-07-11 23:56:25,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:25,693 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 601 transitions. [2022-07-11 23:56:25,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-07-11 23:56:25,693 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:56:25,693 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-11 23:56:25,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-11 23:56:25,694 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:56:25,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:56:25,694 INFO L85 PathProgramCache]: Analyzing trace with hash -168759333, now seen corresponding path program 1 times [2022-07-11 23:56:25,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:56:25,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49023672] [2022-07-11 23:56:25,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:56:25,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:56:25,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:56:25,791 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-11 23:56:25,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:56:25,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49023672] [2022-07-11 23:56:25,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49023672] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:56:25,792 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:56:25,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:56:25,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861045729] [2022-07-11 23:56:25,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:56:25,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:56:25,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:56:25,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:56:25,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:56:25,793 INFO L87 Difference]: Start difference. First operand 370 states and 601 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:26,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:56:26,943 INFO L93 Difference]: Finished difference Result 736 states and 1200 transitions. [2022-07-11 23:56:26,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:56:26,943 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2022-07-11 23:56:26,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:56:26,944 INFO L225 Difference]: With dead ends: 736 [2022-07-11 23:56:26,944 INFO L226 Difference]: Without dead ends: 387 [2022-07-11 23:56:26,945 INFO L412 NwaCegarLoop]: 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 [2022-07-11 23:56:26,945 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 33 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:56:26,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 517 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-11 23:56:26,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2022-07-11 23:56:26,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 370. [2022-07-11 23:56:26,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 369 states have (on average 1.6260162601626016) internal successors, (600), 369 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:26,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 600 transitions. [2022-07-11 23:56:26,951 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 600 transitions. Word has length 111 [2022-07-11 23:56:26,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:56:26,951 INFO L495 AbstractCegarLoop]: Abstraction has 370 states and 600 transitions. [2022-07-11 23:56:26,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:26,951 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 600 transitions. [2022-07-11 23:56:26,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-07-11 23:56:26,952 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:56:26,952 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:56:26,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-11 23:56:26,952 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:56:26,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:56:26,953 INFO L85 PathProgramCache]: Analyzing trace with hash 2051208234, now seen corresponding path program 1 times [2022-07-11 23:56:26,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:56:26,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522915179] [2022-07-11 23:56:26,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:56:26,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:56:27,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:56:27,036 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-11 23:56:27,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:56:27,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522915179] [2022-07-11 23:56:27,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522915179] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:56:27,037 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:56:27,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:56:27,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131700811] [2022-07-11 23:56:27,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:56:27,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:56:27,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:56:27,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:56:27,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:56:27,038 INFO L87 Difference]: Start difference. First operand 370 states and 600 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:27,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:56:27,595 INFO L93 Difference]: Finished difference Result 736 states and 1198 transitions. [2022-07-11 23:56:27,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:56:27,595 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2022-07-11 23:56:27,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:56:27,597 INFO L225 Difference]: With dead ends: 736 [2022-07-11 23:56:27,597 INFO L226 Difference]: Without dead ends: 387 [2022-07-11 23:56:27,597 INFO L412 NwaCegarLoop]: 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 [2022-07-11 23:56:27,598 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 37 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-11 23:56:27,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 517 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-11 23:56:27,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2022-07-11 23:56:27,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 370. [2022-07-11 23:56:27,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 369 states have (on average 1.6233062330623307) internal successors, (599), 369 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:27,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 599 transitions. [2022-07-11 23:56:27,603 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 599 transitions. Word has length 112 [2022-07-11 23:56:27,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:56:27,603 INFO L495 AbstractCegarLoop]: Abstraction has 370 states and 599 transitions. [2022-07-11 23:56:27,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:27,603 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 599 transitions. [2022-07-11 23:56:27,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-07-11 23:56:27,604 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:56:27,604 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-11 23:56:27,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-11 23:56:27,604 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:56:27,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:56:27,605 INFO L85 PathProgramCache]: Analyzing trace with hash -235149395, now seen corresponding path program 1 times [2022-07-11 23:56:27,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:56:27,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353956843] [2022-07-11 23:56:27,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:56:27,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:56:27,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:56:27,692 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-11 23:56:27,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:56:27,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353956843] [2022-07-11 23:56:27,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353956843] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:56:27,692 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:56:27,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:56:27,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721728427] [2022-07-11 23:56:27,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:56:27,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:56:27,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:56:27,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:56:27,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:56:27,694 INFO L87 Difference]: Start difference. First operand 370 states and 599 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:28,805 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:56:28,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:56:28,978 INFO L93 Difference]: Finished difference Result 736 states and 1196 transitions. [2022-07-11 23:56:28,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:56:28,978 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2022-07-11 23:56:28,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:56:28,979 INFO L225 Difference]: With dead ends: 736 [2022-07-11 23:56:28,980 INFO L226 Difference]: Without dead ends: 387 [2022-07-11 23:56:28,980 INFO L412 NwaCegarLoop]: 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 [2022-07-11 23:56:28,980 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 35 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-11 23:56:28,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 517 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-11 23:56:28,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2022-07-11 23:56:28,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 370. [2022-07-11 23:56:28,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 369 states have (on average 1.6205962059620596) internal successors, (598), 369 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:28,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 598 transitions. [2022-07-11 23:56:28,986 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 598 transitions. Word has length 113 [2022-07-11 23:56:28,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:56:28,986 INFO L495 AbstractCegarLoop]: Abstraction has 370 states and 598 transitions. [2022-07-11 23:56:28,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:28,987 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 598 transitions. [2022-07-11 23:56:28,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-07-11 23:56:28,987 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:56:28,988 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-11 23:56:28,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-11 23:56:28,988 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:56:28,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:56:28,988 INFO L85 PathProgramCache]: Analyzing trace with hash 1524135717, now seen corresponding path program 1 times [2022-07-11 23:56:28,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:56:28,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878329162] [2022-07-11 23:56:28,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:56:28,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:56:29,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:56:29,115 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-11 23:56:29,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:56:29,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878329162] [2022-07-11 23:56:29,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878329162] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:56:29,116 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:56:29,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:56:29,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178034541] [2022-07-11 23:56:29,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:56:29,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:56:29,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:56:29,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:56:29,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:56:29,117 INFO L87 Difference]: Start difference. First operand 370 states and 598 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 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) [2022-07-11 23:56:30,705 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:56:30,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:56:30,879 INFO L93 Difference]: Finished difference Result 726 states and 1181 transitions. [2022-07-11 23:56:30,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:56:30,879 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 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 114 [2022-07-11 23:56:30,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:56:30,880 INFO L225 Difference]: With dead ends: 726 [2022-07-11 23:56:30,881 INFO L226 Difference]: Without dead ends: 377 [2022-07-11 23:56:30,881 INFO L412 NwaCegarLoop]: 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 [2022-07-11 23:56:30,882 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 26 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-11 23:56:30,882 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 531 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-07-11 23:56:30,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2022-07-11 23:56:30,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 370. [2022-07-11 23:56:30,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 369 states have (on average 1.6178861788617886) internal successors, (597), 369 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:30,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 597 transitions. [2022-07-11 23:56:30,887 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 597 transitions. Word has length 114 [2022-07-11 23:56:30,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:56:30,887 INFO L495 AbstractCegarLoop]: Abstraction has 370 states and 597 transitions. [2022-07-11 23:56:30,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 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) [2022-07-11 23:56:30,888 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 597 transitions. [2022-07-11 23:56:30,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-07-11 23:56:30,888 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:56:30,889 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:56:30,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-11 23:56:30,889 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:56:30,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:56:30,889 INFO L85 PathProgramCache]: Analyzing trace with hash 1622495564, now seen corresponding path program 1 times [2022-07-11 23:56:30,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:56:30,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783661666] [2022-07-11 23:56:30,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:56:30,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:56:30,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:56:30,966 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-11 23:56:30,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:56:30,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783661666] [2022-07-11 23:56:30,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783661666] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:56:30,966 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:56:30,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:56:30,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837324495] [2022-07-11 23:56:30,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:56:30,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:56:30,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:56:30,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:56:30,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:56:30,968 INFO L87 Difference]: Start difference. First operand 370 states and 597 transitions. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:32,977 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 [] [2022-07-11 23:56:33,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:56:33,229 INFO L93 Difference]: Finished difference Result 813 states and 1312 transitions. [2022-07-11 23:56:33,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:56:33,230 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 119 [2022-07-11 23:56:33,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:56:33,231 INFO L225 Difference]: With dead ends: 813 [2022-07-11 23:56:33,231 INFO L226 Difference]: Without dead ends: 464 [2022-07-11 23:56:33,232 INFO L412 NwaCegarLoop]: 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 [2022-07-11 23:56:33,232 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 82 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 10 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-11 23:56:33,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 479 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 250 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-11 23:56:33,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2022-07-11 23:56:33,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 410. [2022-07-11 23:56:33,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 1.6234718826405867) internal successors, (664), 409 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:33,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 664 transitions. [2022-07-11 23:56:33,239 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 664 transitions. Word has length 119 [2022-07-11 23:56:33,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:56:33,239 INFO L495 AbstractCegarLoop]: Abstraction has 410 states and 664 transitions. [2022-07-11 23:56:33,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:33,239 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 664 transitions. [2022-07-11 23:56:33,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-07-11 23:56:33,240 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:56:33,240 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:56:33,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-11 23:56:33,241 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:56:33,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:56:33,241 INFO L85 PathProgramCache]: Analyzing trace with hash -454841334, now seen corresponding path program 1 times [2022-07-11 23:56:33,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:56:33,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352798533] [2022-07-11 23:56:33,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:56:33,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:56:33,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:56:33,362 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-11 23:56:33,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:56:33,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352798533] [2022-07-11 23:56:33,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352798533] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:56:33,363 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:56:33,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:56:33,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685485121] [2022-07-11 23:56:33,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:56:33,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:56:33,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:56:33,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:56:33,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:56:33,364 INFO L87 Difference]: Start difference. First operand 410 states and 664 transitions. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:35,375 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 [] [2022-07-11 23:56:35,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:56:35,564 INFO L93 Difference]: Finished difference Result 846 states and 1373 transitions. [2022-07-11 23:56:35,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:56:35,565 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 119 [2022-07-11 23:56:35,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:56:35,566 INFO L225 Difference]: With dead ends: 846 [2022-07-11 23:56:35,566 INFO L226 Difference]: Without dead ends: 457 [2022-07-11 23:56:35,567 INFO L412 NwaCegarLoop]: 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 [2022-07-11 23:56:35,567 INFO L413 NwaCegarLoop]: 250 mSDtfsCounter, 37 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 611 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-11 23:56:35,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 611 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 180 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-11 23:56:35,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2022-07-11 23:56:35,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 434. [2022-07-11 23:56:35,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 433 states have (on average 1.6235565819861433) internal successors, (703), 433 states have internal predecessors, (703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:35,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 703 transitions. [2022-07-11 23:56:35,574 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 703 transitions. Word has length 119 [2022-07-11 23:56:35,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:56:35,574 INFO L495 AbstractCegarLoop]: Abstraction has 434 states and 703 transitions. [2022-07-11 23:56:35,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:35,574 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 703 transitions. [2022-07-11 23:56:35,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-07-11 23:56:35,575 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:56:35,575 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:56:35,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-11 23:56:35,576 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:56:35,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:56:35,576 INFO L85 PathProgramCache]: Analyzing trace with hash 734680572, now seen corresponding path program 1 times [2022-07-11 23:56:35,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:56:35,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389101094] [2022-07-11 23:56:35,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:56:35,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:56:35,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:56:35,654 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-11 23:56:35,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:56:35,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389101094] [2022-07-11 23:56:35,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389101094] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:56:35,655 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:56:35,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:56:35,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553917094] [2022-07-11 23:56:35,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:56:35,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:56:35,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:56:35,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:56:35,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:56:35,656 INFO L87 Difference]: Start difference. First operand 434 states and 703 transitions. Second operand has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:37,661 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 [] [2022-07-11 23:56:37,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:56:37,895 INFO L93 Difference]: Finished difference Result 892 states and 1441 transitions. [2022-07-11 23:56:37,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:56:37,895 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 127 [2022-07-11 23:56:37,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:56:37,897 INFO L225 Difference]: With dead ends: 892 [2022-07-11 23:56:37,897 INFO L226 Difference]: Without dead ends: 479 [2022-07-11 23:56:37,897 INFO L412 NwaCegarLoop]: 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 [2022-07-11 23:56:37,898 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 64 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 10 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-11 23:56:37,898 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 485 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 244 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-11 23:56:37,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2022-07-11 23:56:37,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 437. [2022-07-11 23:56:37,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437 states, 436 states have (on average 1.6192660550458715) internal successors, (706), 436 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:37,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 706 transitions. [2022-07-11 23:56:37,904 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 706 transitions. Word has length 127 [2022-07-11 23:56:37,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:56:37,904 INFO L495 AbstractCegarLoop]: Abstraction has 437 states and 706 transitions. [2022-07-11 23:56:37,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:37,905 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 706 transitions. [2022-07-11 23:56:37,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-07-11 23:56:37,906 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:56:37,906 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:56:37,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-07-11 23:56:37,906 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:56:37,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:56:37,906 INFO L85 PathProgramCache]: Analyzing trace with hash 474669795, now seen corresponding path program 1 times [2022-07-11 23:56:37,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:56:37,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565900085] [2022-07-11 23:56:37,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:56:37,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:56:38,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:56:38,066 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-11 23:56:38,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:56:38,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565900085] [2022-07-11 23:56:38,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565900085] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:56:38,067 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:56:38,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:56:38,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992639049] [2022-07-11 23:56:38,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:56:38,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:56:38,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:56:38,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:56:38,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:56:38,068 INFO L87 Difference]: Start difference. First operand 437 states and 706 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) [2022-07-11 23:56:39,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:56:39,213 INFO L93 Difference]: Finished difference Result 931 states and 1497 transitions. [2022-07-11 23:56:39,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:56:39,214 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 133 [2022-07-11 23:56:39,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:56:39,215 INFO L225 Difference]: With dead ends: 931 [2022-07-11 23:56:39,215 INFO L226 Difference]: Without dead ends: 515 [2022-07-11 23:56:39,216 INFO L412 NwaCegarLoop]: 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 [2022-07-11 23:56:39,216 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 150 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:56:39,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 350 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-11 23:56:39,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2022-07-11 23:56:39,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 437. [2022-07-11 23:56:39,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437 states, 436 states have (on average 1.6009174311926606) internal successors, (698), 436 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:39,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 698 transitions. [2022-07-11 23:56:39,223 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 698 transitions. Word has length 133 [2022-07-11 23:56:39,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:56:39,223 INFO L495 AbstractCegarLoop]: Abstraction has 437 states and 698 transitions. [2022-07-11 23:56:39,223 INFO L496 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) [2022-07-11 23:56:39,223 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 698 transitions. [2022-07-11 23:56:39,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-07-11 23:56:39,224 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:56:39,224 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:56:39,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-07-11 23:56:39,225 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:56:39,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:56:39,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1205175400, now seen corresponding path program 1 times [2022-07-11 23:56:39,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:56:39,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653077766] [2022-07-11 23:56:39,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:56:39,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:56:39,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:56:39,296 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-11 23:56:39,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:56:39,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653077766] [2022-07-11 23:56:39,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653077766] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:56:39,296 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:56:39,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:56:39,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074275099] [2022-07-11 23:56:39,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:56:39,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:56:39,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:56:39,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:56:39,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:56:39,298 INFO L87 Difference]: Start difference. First operand 437 states and 698 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) [2022-07-11 23:56:41,311 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 [] [2022-07-11 23:56:41,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:56:41,609 INFO L93 Difference]: Finished difference Result 930 states and 1480 transitions. [2022-07-11 23:56:41,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:56:41,609 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 133 [2022-07-11 23:56:41,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:56:41,610 INFO L225 Difference]: With dead ends: 930 [2022-07-11 23:56:41,610 INFO L226 Difference]: Without dead ends: 514 [2022-07-11 23:56:41,611 INFO L412 NwaCegarLoop]: 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 [2022-07-11 23:56:41,612 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 142 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 59 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-11 23:56:41,612 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 352 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 257 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-11 23:56:41,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2022-07-11 23:56:41,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 437. [2022-07-11 23:56:41,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437 states, 436 states have (on average 1.584862385321101) internal successors, (691), 436 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:41,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 691 transitions. [2022-07-11 23:56:41,630 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 691 transitions. Word has length 133 [2022-07-11 23:56:41,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:56:41,630 INFO L495 AbstractCegarLoop]: Abstraction has 437 states and 691 transitions. [2022-07-11 23:56:41,630 INFO L496 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) [2022-07-11 23:56:41,630 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 691 transitions. [2022-07-11 23:56:41,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-07-11 23:56:41,633 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:56:41,633 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:56:41,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-07-11 23:56:41,634 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:56:41,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:56:41,634 INFO L85 PathProgramCache]: Analyzing trace with hash -12918771, now seen corresponding path program 1 times [2022-07-11 23:56:41,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:56:41,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769181097] [2022-07-11 23:56:41,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:56:41,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:56:41,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:56:41,724 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-07-11 23:56:41,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:56:41,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769181097] [2022-07-11 23:56:41,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769181097] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:56:41,725 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:56:41,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-11 23:56:41,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806974617] [2022-07-11 23:56:41,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:56:41,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-11 23:56:41,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:56:41,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-11 23:56:41,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:56:41,727 INFO L87 Difference]: Start difference. First operand 437 states and 691 transitions. Second operand has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 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) [2022-07-11 23:56:43,470 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:56:43,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:56:43,749 INFO L93 Difference]: Finished difference Result 863 states and 1370 transitions. [2022-07-11 23:56:43,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-11 23:56:43,750 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 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 134 [2022-07-11 23:56:43,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:56:43,751 INFO L225 Difference]: With dead ends: 863 [2022-07-11 23:56:43,751 INFO L226 Difference]: Without dead ends: 447 [2022-07-11 23:56:43,752 INFO L412 NwaCegarLoop]: 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 [2022-07-11 23:56:43,753 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 151 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-11 23:56:43,753 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 378 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-07-11 23:56:43,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2022-07-11 23:56:43,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 446. [2022-07-11 23:56:43,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 445 states have (on average 1.5775280898876405) internal successors, (702), 445 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:43,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 702 transitions. [2022-07-11 23:56:43,759 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 702 transitions. Word has length 134 [2022-07-11 23:56:43,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:56:43,760 INFO L495 AbstractCegarLoop]: Abstraction has 446 states and 702 transitions. [2022-07-11 23:56:43,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 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) [2022-07-11 23:56:43,760 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 702 transitions. [2022-07-11 23:56:43,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-07-11 23:56:43,761 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:56:43,761 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:56:43,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-07-11 23:56:43,761 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:56:43,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:56:43,762 INFO L85 PathProgramCache]: Analyzing trace with hash 1630069500, now seen corresponding path program 1 times [2022-07-11 23:56:43,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:56:43,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001796806] [2022-07-11 23:56:43,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:56:43,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:56:43,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:56:43,845 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-11 23:56:43,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:56:43,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001796806] [2022-07-11 23:56:43,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001796806] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:56:43,846 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:56:43,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:56:43,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462811907] [2022-07-11 23:56:43,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:56:43,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:56:43,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:56:43,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:56:43,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:56:43,847 INFO L87 Difference]: Start difference. First operand 446 states and 702 transitions. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:45,006 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:56:45,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:56:45,257 INFO L93 Difference]: Finished difference Result 911 states and 1432 transitions. [2022-07-11 23:56:45,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:56:45,258 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2022-07-11 23:56:45,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:56:45,259 INFO L225 Difference]: With dead ends: 911 [2022-07-11 23:56:45,259 INFO L226 Difference]: Without dead ends: 486 [2022-07-11 23:56:45,260 INFO L412 NwaCegarLoop]: 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 [2022-07-11 23:56:45,260 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 89 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 515 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-11 23:56:45,260 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 515 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-11 23:56:45,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2022-07-11 23:56:45,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 446. [2022-07-11 23:56:45,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 445 states have (on average 1.5752808988764044) internal successors, (701), 445 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:45,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 701 transitions. [2022-07-11 23:56:45,268 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 701 transitions. Word has length 135 [2022-07-11 23:56:45,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:56:45,268 INFO L495 AbstractCegarLoop]: Abstraction has 446 states and 701 transitions. [2022-07-11 23:56:45,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:45,268 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 701 transitions. [2022-07-11 23:56:45,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-07-11 23:56:45,269 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:56:45,269 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:56:45,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-07-11 23:56:45,270 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:56:45,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:56:45,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1601569210, now seen corresponding path program 1 times [2022-07-11 23:56:45,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:56:45,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573832695] [2022-07-11 23:56:45,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:56:45,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:56:45,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:56:45,355 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-11 23:56:45,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:56:45,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573832695] [2022-07-11 23:56:45,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573832695] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:56:45,355 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:56:45,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:56:45,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004433304] [2022-07-11 23:56:45,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:56:45,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:56:45,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:56:45,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:56:45,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:56:45,357 INFO L87 Difference]: Start difference. First operand 446 states and 701 transitions. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:47,312 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.95s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:56:47,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:56:47,520 INFO L93 Difference]: Finished difference Result 892 states and 1404 transitions. [2022-07-11 23:56:47,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:56:47,520 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2022-07-11 23:56:47,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:56:47,522 INFO L225 Difference]: With dead ends: 892 [2022-07-11 23:56:47,522 INFO L226 Difference]: Without dead ends: 467 [2022-07-11 23:56:47,522 INFO L412 NwaCegarLoop]: 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 [2022-07-11 23:56:47,523 INFO L413 NwaCegarLoop]: 248 mSDtfsCounter, 45 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 607 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:56:47,523 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 607 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-07-11 23:56:47,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2022-07-11 23:56:47,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 446. [2022-07-11 23:56:47,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 445 states have (on average 1.5730337078651686) internal successors, (700), 445 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:47,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 700 transitions. [2022-07-11 23:56:47,529 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 700 transitions. Word has length 135 [2022-07-11 23:56:47,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:56:47,529 INFO L495 AbstractCegarLoop]: Abstraction has 446 states and 700 transitions. [2022-07-11 23:56:47,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:47,529 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 700 transitions. [2022-07-11 23:56:47,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-07-11 23:56:47,530 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:56:47,530 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-11 23:56:47,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-07-11 23:56:47,530 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:56:47,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:56:47,531 INFO L85 PathProgramCache]: Analyzing trace with hash -315273601, now seen corresponding path program 1 times [2022-07-11 23:56:47,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:56:47,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879901594] [2022-07-11 23:56:47,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:56:47,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:56:47,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:56:47,610 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-11 23:56:47,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:56:47,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879901594] [2022-07-11 23:56:47,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879901594] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:56:47,611 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:56:47,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:56:47,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904429335] [2022-07-11 23:56:47,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:56:47,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:56:47,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:56:47,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:56:47,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:56:47,612 INFO L87 Difference]: Start difference. First operand 446 states and 700 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) [2022-07-11 23:56:49,256 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 [] [2022-07-11 23:56:49,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:56:49,562 INFO L93 Difference]: Finished difference Result 948 states and 1483 transitions. [2022-07-11 23:56:49,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:56:49,563 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 136 [2022-07-11 23:56:49,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:56:49,564 INFO L225 Difference]: With dead ends: 948 [2022-07-11 23:56:49,564 INFO L226 Difference]: Without dead ends: 523 [2022-07-11 23:56:49,565 INFO L412 NwaCegarLoop]: 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 [2022-07-11 23:56:49,565 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 145 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-07-11 23:56:49,566 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 360 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-07-11 23:56:49,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2022-07-11 23:56:49,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 446. [2022-07-11 23:56:49,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 445 states have (on average 1.5550561797752809) internal successors, (692), 445 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:49,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 692 transitions. [2022-07-11 23:56:49,573 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 692 transitions. Word has length 136 [2022-07-11 23:56:49,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:56:49,573 INFO L495 AbstractCegarLoop]: Abstraction has 446 states and 692 transitions. [2022-07-11 23:56:49,573 INFO L496 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) [2022-07-11 23:56:49,573 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 692 transitions. [2022-07-11 23:56:49,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-07-11 23:56:49,574 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:56:49,574 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:56:49,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-07-11 23:56:49,574 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:56:49,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:56:49,575 INFO L85 PathProgramCache]: Analyzing trace with hash 673289249, now seen corresponding path program 1 times [2022-07-11 23:56:49,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:56:49,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123824717] [2022-07-11 23:56:49,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:56:49,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:56:49,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:56:49,654 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-11 23:56:49,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:56:49,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123824717] [2022-07-11 23:56:49,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123824717] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:56:49,654 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:56:49,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:56:49,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014340448] [2022-07-11 23:56:49,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:56:49,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:56:49,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:56:49,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:56:49,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:56:49,656 INFO L87 Difference]: Start difference. First operand 446 states and 692 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) [2022-07-11 23:56:50,860 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:56:51,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:56:51,146 INFO L93 Difference]: Finished difference Result 948 states and 1467 transitions. [2022-07-11 23:56:51,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:56:51,146 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 137 [2022-07-11 23:56:51,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:56:51,148 INFO L225 Difference]: With dead ends: 948 [2022-07-11 23:56:51,148 INFO L226 Difference]: Without dead ends: 523 [2022-07-11 23:56:51,148 INFO L412 NwaCegarLoop]: 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 [2022-07-11 23:56:51,149 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 143 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-11 23:56:51,149 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 384 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-11 23:56:51,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2022-07-11 23:56:51,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 446. [2022-07-11 23:56:51,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 445 states have (on average 1.5370786516853931) internal successors, (684), 445 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:51,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 684 transitions. [2022-07-11 23:56:51,166 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 684 transitions. Word has length 137 [2022-07-11 23:56:51,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:56:51,166 INFO L495 AbstractCegarLoop]: Abstraction has 446 states and 684 transitions. [2022-07-11 23:56:51,166 INFO L496 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) [2022-07-11 23:56:51,166 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 684 transitions. [2022-07-11 23:56:51,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-07-11 23:56:51,167 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:56:51,167 INFO L195 NwaCegarLoop]: 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, 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] [2022-07-11 23:56:51,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-07-11 23:56:51,168 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:56:51,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:56:51,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1690568053, now seen corresponding path program 1 times [2022-07-11 23:56:51,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:56:51,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476834066] [2022-07-11 23:56:51,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:56:51,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:56:51,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:56:51,274 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 134 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-07-11 23:56:51,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:56:51,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476834066] [2022-07-11 23:56:51,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476834066] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:56:51,275 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:56:51,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:56:51,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727485378] [2022-07-11 23:56:51,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:56:51,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:56:51,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:56:51,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:56:51,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:56:51,276 INFO L87 Difference]: Start difference. First operand 446 states and 684 transitions. Second operand has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:52,563 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:56:52,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:56:52,855 INFO L93 Difference]: Finished difference Result 988 states and 1515 transitions. [2022-07-11 23:56:52,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:56:52,856 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2022-07-11 23:56:52,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:56:52,857 INFO L225 Difference]: With dead ends: 988 [2022-07-11 23:56:52,857 INFO L226 Difference]: Without dead ends: 563 [2022-07-11 23:56:52,858 INFO L412 NwaCegarLoop]: 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 [2022-07-11 23:56:52,858 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 127 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-11 23:56:52,859 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 360 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-11 23:56:52,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2022-07-11 23:56:52,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 476. [2022-07-11 23:56:52,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 475 states have (on average 1.528421052631579) internal successors, (726), 475 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:52,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 726 transitions. [2022-07-11 23:56:52,866 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 726 transitions. Word has length 140 [2022-07-11 23:56:52,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:56:52,867 INFO L495 AbstractCegarLoop]: Abstraction has 476 states and 726 transitions. [2022-07-11 23:56:52,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:52,867 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 726 transitions. [2022-07-11 23:56:52,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-07-11 23:56:52,868 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:56:52,868 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:56:52,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-07-11 23:56:52,868 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:56:52,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:56:52,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1678698517, now seen corresponding path program 1 times [2022-07-11 23:56:52,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:56:52,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188484814] [2022-07-11 23:56:52,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:56:52,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:56:52,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:56:52,944 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 122 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-11 23:56:52,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:56:52,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188484814] [2022-07-11 23:56:52,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188484814] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:56:52,945 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:56:52,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:56:52,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266747781] [2022-07-11 23:56:52,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:56:52,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:56:52,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:56:52,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:56:52,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:56:52,946 INFO L87 Difference]: Start difference. First operand 476 states and 726 transitions. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:54,958 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 [] [2022-07-11 23:56:55,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:56:55,189 INFO L93 Difference]: Finished difference Result 961 states and 1468 transitions. [2022-07-11 23:56:55,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:56:55,190 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2022-07-11 23:56:55,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:56:55,191 INFO L225 Difference]: With dead ends: 961 [2022-07-11 23:56:55,191 INFO L226 Difference]: Without dead ends: 506 [2022-07-11 23:56:55,192 INFO L412 NwaCegarLoop]: 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 [2022-07-11 23:56:55,192 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 67 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 515 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-11 23:56:55,192 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 515 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 225 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-11 23:56:55,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2022-07-11 23:56:55,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 476. [2022-07-11 23:56:55,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 475 states have (on average 1.5263157894736843) internal successors, (725), 475 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:55,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 725 transitions. [2022-07-11 23:56:55,204 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 725 transitions. Word has length 141 [2022-07-11 23:56:55,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:56:55,204 INFO L495 AbstractCegarLoop]: Abstraction has 476 states and 725 transitions. [2022-07-11 23:56:55,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:55,205 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 725 transitions. [2022-07-11 23:56:55,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-07-11 23:56:55,206 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:56:55,206 INFO L195 NwaCegarLoop]: 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, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:56:55,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-07-11 23:56:55,207 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:56:55,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:56:55,207 INFO L85 PathProgramCache]: Analyzing trace with hash -324893651, now seen corresponding path program 1 times [2022-07-11 23:56:55,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:56:55,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625686068] [2022-07-11 23:56:55,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:56:55,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:56:55,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:56:55,297 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 136 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-07-11 23:56:55,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:56:55,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625686068] [2022-07-11 23:56:55,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625686068] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:56:55,297 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:56:55,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:56:55,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668606839] [2022-07-11 23:56:55,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:56:55,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:56:55,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:56:55,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:56:55,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:56:55,299 INFO L87 Difference]: Start difference. First operand 476 states and 725 transitions. Second operand has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:55,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:56:55,748 INFO L93 Difference]: Finished difference Result 959 states and 1464 transitions. [2022-07-11 23:56:55,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:56:55,748 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2022-07-11 23:56:55,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:56:55,749 INFO L225 Difference]: With dead ends: 959 [2022-07-11 23:56:55,749 INFO L226 Difference]: Without dead ends: 504 [2022-07-11 23:56:55,750 INFO L412 NwaCegarLoop]: 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 [2022-07-11 23:56:55,750 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 58 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-11 23:56:55,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 517 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-11 23:56:55,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2022-07-11 23:56:55,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 476. [2022-07-11 23:56:55,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 475 states have (on average 1.5242105263157895) internal successors, (724), 475 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:55,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 724 transitions. [2022-07-11 23:56:55,758 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 724 transitions. Word has length 141 [2022-07-11 23:56:55,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:56:55,758 INFO L495 AbstractCegarLoop]: Abstraction has 476 states and 724 transitions. [2022-07-11 23:56:55,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:55,758 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 724 transitions. [2022-07-11 23:56:55,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-07-11 23:56:55,759 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:56:55,760 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:56:55,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-07-11 23:56:55,760 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:56:55,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:56:55,760 INFO L85 PathProgramCache]: Analyzing trace with hash -227704749, now seen corresponding path program 1 times [2022-07-11 23:56:55,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:56:55,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710274704] [2022-07-11 23:56:55,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:56:55,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:56:55,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:56:55,836 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-07-11 23:56:55,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:56:55,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710274704] [2022-07-11 23:56:55,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710274704] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:56:55,837 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:56:55,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:56:55,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240947300] [2022-07-11 23:56:55,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:56:55,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:56:55,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:56:55,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:56:55,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:56:55,838 INFO L87 Difference]: Start difference. First operand 476 states and 724 transitions. Second operand has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:57,843 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 [] [2022-07-11 23:56:58,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:56:58,122 INFO L93 Difference]: Finished difference Result 1008 states and 1531 transitions. [2022-07-11 23:56:58,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:56:58,122 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2022-07-11 23:56:58,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:56:58,123 INFO L225 Difference]: With dead ends: 1008 [2022-07-11 23:56:58,123 INFO L226 Difference]: Without dead ends: 553 [2022-07-11 23:56:58,124 INFO L412 NwaCegarLoop]: 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 [2022-07-11 23:56:58,124 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 119 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 56 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-11 23:56:58,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 384 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 255 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-11 23:56:58,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2022-07-11 23:56:58,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 476. [2022-07-11 23:56:58,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 475 states have (on average 1.52) internal successors, (722), 475 states have internal predecessors, (722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:58,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 722 transitions. [2022-07-11 23:56:58,133 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 722 transitions. Word has length 141 [2022-07-11 23:56:58,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:56:58,133 INFO L495 AbstractCegarLoop]: Abstraction has 476 states and 722 transitions. [2022-07-11 23:56:58,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:58,133 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 722 transitions. [2022-07-11 23:56:58,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-07-11 23:56:58,134 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:56:58,134 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:56:58,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-07-11 23:56:58,134 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:56:58,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:56:58,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1527043924, now seen corresponding path program 1 times [2022-07-11 23:56:58,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:56:58,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856184491] [2022-07-11 23:56:58,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:56:58,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:56:58,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:56:58,216 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 130 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-07-11 23:56:58,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:56:58,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856184491] [2022-07-11 23:56:58,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856184491] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:56:58,217 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:56:58,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:56:58,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127335741] [2022-07-11 23:56:58,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:56:58,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:56:58,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:56:58,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:56:58,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:56:58,218 INFO L87 Difference]: Start difference. First operand 476 states and 722 transitions. Second operand has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:59,250 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:56:59,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:56:59,513 INFO L93 Difference]: Finished difference Result 1048 states and 1589 transitions. [2022-07-11 23:56:59,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:56:59,514 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 143 [2022-07-11 23:56:59,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:56:59,515 INFO L225 Difference]: With dead ends: 1048 [2022-07-11 23:56:59,515 INFO L226 Difference]: Without dead ends: 593 [2022-07-11 23:56:59,516 INFO L412 NwaCegarLoop]: 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 [2022-07-11 23:56:59,516 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 128 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-11 23:56:59,517 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 384 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-11 23:56:59,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2022-07-11 23:56:59,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 504. [2022-07-11 23:56:59,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 503 states have (on average 1.5089463220675945) internal successors, (759), 503 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:59,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 759 transitions. [2022-07-11 23:56:59,525 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 759 transitions. Word has length 143 [2022-07-11 23:56:59,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:56:59,525 INFO L495 AbstractCegarLoop]: Abstraction has 504 states and 759 transitions. [2022-07-11 23:56:59,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:59,525 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 759 transitions. [2022-07-11 23:56:59,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-07-11 23:56:59,526 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:56:59,526 INFO L195 NwaCegarLoop]: 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, 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] [2022-07-11 23:56:59,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-07-11 23:56:59,527 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:56:59,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:56:59,527 INFO L85 PathProgramCache]: Analyzing trace with hash 2144575250, now seen corresponding path program 1 times [2022-07-11 23:56:59,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:56:59,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289091105] [2022-07-11 23:56:59,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:56:59,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:56:59,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:56:59,623 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 132 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-07-11 23:56:59,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:56:59,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289091105] [2022-07-11 23:56:59,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289091105] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:56:59,624 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:56:59,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:56:59,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303441343] [2022-07-11 23:56:59,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:56:59,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:56:59,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:56:59,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:56:59,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:56:59,625 INFO L87 Difference]: Start difference. First operand 504 states and 759 transitions. Second operand has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:57:01,331 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:57:01,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:57:01,624 INFO L93 Difference]: Finished difference Result 1064 states and 1601 transitions. [2022-07-11 23:57:01,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:57:01,625 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 144 [2022-07-11 23:57:01,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:57:01,626 INFO L225 Difference]: With dead ends: 1064 [2022-07-11 23:57:01,626 INFO L226 Difference]: Without dead ends: 581 [2022-07-11 23:57:01,627 INFO L412 NwaCegarLoop]: 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 [2022-07-11 23:57:01,627 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 127 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-11 23:57:01,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 360 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-07-11 23:57:01,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2022-07-11 23:57:01,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 504. [2022-07-11 23:57:01,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 503 states have (on average 1.4950298210735586) internal successors, (752), 503 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:57:01,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 752 transitions. [2022-07-11 23:57:01,647 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 752 transitions. Word has length 144 [2022-07-11 23:57:01,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:57:01,648 INFO L495 AbstractCegarLoop]: Abstraction has 504 states and 752 transitions. [2022-07-11 23:57:01,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:57:01,648 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 752 transitions. [2022-07-11 23:57:01,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-07-11 23:57:01,649 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:57:01,649 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:57:01,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-07-11 23:57:01,649 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:57:01,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:57:01,650 INFO L85 PathProgramCache]: Analyzing trace with hash 599952899, now seen corresponding path program 1 times [2022-07-11 23:57:01,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:57:01,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128518342] [2022-07-11 23:57:01,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:57:01,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:57:01,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:57:01,733 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 137 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-11 23:57:01,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:57:01,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128518342] [2022-07-11 23:57:01,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128518342] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:57:01,734 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:57:01,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-11 23:57:01,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050711367] [2022-07-11 23:57:01,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:57:01,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-11 23:57:01,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:57:01,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-11 23:57:01,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 23:57:01,737 INFO L87 Difference]: Start difference. First operand 504 states and 752 transitions. Second operand has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:57:01,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:57:01,787 INFO L93 Difference]: Finished difference Result 1461 states and 2193 transitions. [2022-07-11 23:57:01,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-11 23:57:01,787 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 149 [2022-07-11 23:57:01,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:57:01,790 INFO L225 Difference]: With dead ends: 1461 [2022-07-11 23:57:01,790 INFO L226 Difference]: Without dead ends: 978 [2022-07-11 23:57:01,791 INFO L412 NwaCegarLoop]: 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 [2022-07-11 23:57:01,791 INFO L413 NwaCegarLoop]: 251 mSDtfsCounter, 133 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 23:57:01,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 440 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 23:57:01,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 978 states. [2022-07-11 23:57:01,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 978 to 976. [2022-07-11 23:57:01,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 976 states, 975 states have (on average 1.4923076923076923) internal successors, (1455), 975 states have internal predecessors, (1455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:57:01,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 976 states to 976 states and 1455 transitions. [2022-07-11 23:57:01,817 INFO L78 Accepts]: Start accepts. Automaton has 976 states and 1455 transitions. Word has length 149 [2022-07-11 23:57:01,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:57:01,817 INFO L495 AbstractCegarLoop]: Abstraction has 976 states and 1455 transitions. [2022-07-11 23:57:01,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:57:01,817 INFO L276 IsEmpty]: Start isEmpty. Operand 976 states and 1455 transitions. [2022-07-11 23:57:01,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-07-11 23:57:01,819 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:57:01,819 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:57:01,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-07-11 23:57:01,819 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:57:01,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:57:01,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1373212479, now seen corresponding path program 1 times [2022-07-11 23:57:01,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:57:01,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701706109] [2022-07-11 23:57:01,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:57:01,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:57:01,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:57:01,890 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-07-11 23:57:01,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:57:01,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701706109] [2022-07-11 23:57:01,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701706109] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:57:01,890 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:57:01,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-11 23:57:01,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022199573] [2022-07-11 23:57:01,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:57:01,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-11 23:57:01,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:57:01,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-11 23:57:01,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 23:57:01,893 INFO L87 Difference]: Start difference. First operand 976 states and 1455 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) [2022-07-11 23:57:01,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:57:01,926 INFO L93 Difference]: Finished difference Result 1958 states and 2922 transitions. [2022-07-11 23:57:01,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-11 23:57:01,926 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 149 [2022-07-11 23:57:01,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:57:01,929 INFO L225 Difference]: With dead ends: 1958 [2022-07-11 23:57:01,929 INFO L226 Difference]: Without dead ends: 1003 [2022-07-11 23:57:01,930 INFO L412 NwaCegarLoop]: 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 [2022-07-11 23:57:01,932 INFO L413 NwaCegarLoop]: 227 mSDtfsCounter, 15 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 23:57:01,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 416 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 23:57:01,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1003 states. [2022-07-11 23:57:01,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1003 to 1003. [2022-07-11 23:57:01,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1003 states, 1002 states have (on average 1.4870259481037924) internal successors, (1490), 1002 states have internal predecessors, (1490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:57:01,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1003 states to 1003 states and 1490 transitions. [2022-07-11 23:57:01,949 INFO L78 Accepts]: Start accepts. Automaton has 1003 states and 1490 transitions. Word has length 149 [2022-07-11 23:57:01,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:57:01,949 INFO L495 AbstractCegarLoop]: Abstraction has 1003 states and 1490 transitions. [2022-07-11 23:57:01,949 INFO L496 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) [2022-07-11 23:57:01,950 INFO L276 IsEmpty]: Start isEmpty. Operand 1003 states and 1490 transitions. [2022-07-11 23:57:01,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-07-11 23:57:01,951 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:57:01,951 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:57:01,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-07-11 23:57:01,951 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:57:01,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:57:01,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1957984129, now seen corresponding path program 1 times [2022-07-11 23:57:01,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:57:01,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8154771] [2022-07-11 23:57:01,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:57:01,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:57:01,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:57:02,017 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2022-07-11 23:57:02,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:57:02,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8154771] [2022-07-11 23:57:02,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8154771] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:57:02,018 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:57:02,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-11 23:57:02,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261606013] [2022-07-11 23:57:02,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:57:02,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-11 23:57:02,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:57:02,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-11 23:57:02,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 23:57:02,019 INFO L87 Difference]: Start difference. First operand 1003 states and 1490 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) [2022-07-11 23:57:02,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:57:02,048 INFO L93 Difference]: Finished difference Result 1987 states and 2958 transitions. [2022-07-11 23:57:02,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-11 23:57:02,049 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 149 [2022-07-11 23:57:02,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:57:02,051 INFO L225 Difference]: With dead ends: 1987 [2022-07-11 23:57:02,051 INFO L226 Difference]: Without dead ends: 1005 [2022-07-11 23:57:02,053 INFO L412 NwaCegarLoop]: 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 [2022-07-11 23:57:02,058 INFO L413 NwaCegarLoop]: 215 mSDtfsCounter, 4 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 23:57:02,059 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 395 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 23:57:02,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1005 states. [2022-07-11 23:57:02,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1005 to 1005. [2022-07-11 23:57:02,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1005 states, 1004 states have (on average 1.4860557768924303) internal successors, (1492), 1004 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:57:02,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1005 states to 1005 states and 1492 transitions. [2022-07-11 23:57:02,086 INFO L78 Accepts]: Start accepts. Automaton has 1005 states and 1492 transitions. Word has length 149 [2022-07-11 23:57:02,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:57:02,087 INFO L495 AbstractCegarLoop]: Abstraction has 1005 states and 1492 transitions. [2022-07-11 23:57:02,087 INFO L496 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) [2022-07-11 23:57:02,087 INFO L276 IsEmpty]: Start isEmpty. Operand 1005 states and 1492 transitions. [2022-07-11 23:57:02,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-07-11 23:57:02,088 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:57:02,088 INFO L195 NwaCegarLoop]: 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, 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] [2022-07-11 23:57:02,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-07-11 23:57:02,088 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:57:02,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:57:02,088 INFO L85 PathProgramCache]: Analyzing trace with hash -702873002, now seen corresponding path program 1 times [2022-07-11 23:57:02,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:57:02,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440785933] [2022-07-11 23:57:02,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:57:02,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:57:02,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:57:02,163 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 144 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-07-11 23:57:02,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:57:02,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440785933] [2022-07-11 23:57:02,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440785933] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:57:02,163 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:57:02,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:57:02,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976905876] [2022-07-11 23:57:02,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:57:02,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:57:02,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:57:02,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:57:02,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:57:02,164 INFO L87 Difference]: Start difference. First operand 1005 states and 1492 transitions. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:57:03,279 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:57:03,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:57:03,496 INFO L93 Difference]: Finished difference Result 2028 states and 3008 transitions. [2022-07-11 23:57:03,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:57:03,496 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2022-07-11 23:57:03,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:57:03,499 INFO L225 Difference]: With dead ends: 2028 [2022-07-11 23:57:03,499 INFO L226 Difference]: Without dead ends: 1046 [2022-07-11 23:57:03,500 INFO L412 NwaCegarLoop]: 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 [2022-07-11 23:57:03,500 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 42 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-11 23:57:03,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 533 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-11 23:57:03,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1046 states. [2022-07-11 23:57:03,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1046 to 1005. [2022-07-11 23:57:03,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1005 states, 1004 states have (on average 1.4840637450199203) internal successors, (1490), 1004 states have internal predecessors, (1490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:57:03,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1005 states to 1005 states and 1490 transitions. [2022-07-11 23:57:03,516 INFO L78 Accepts]: Start accepts. Automaton has 1005 states and 1490 transitions. Word has length 150 [2022-07-11 23:57:03,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:57:03,516 INFO L495 AbstractCegarLoop]: Abstraction has 1005 states and 1490 transitions. [2022-07-11 23:57:03,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:57:03,516 INFO L276 IsEmpty]: Start isEmpty. Operand 1005 states and 1490 transitions. [2022-07-11 23:57:03,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-07-11 23:57:03,517 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:57:03,518 INFO L195 NwaCegarLoop]: 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, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:57:03,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-07-11 23:57:03,518 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:57:03,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:57:03,518 INFO L85 PathProgramCache]: Analyzing trace with hash 24364435, now seen corresponding path program 1 times [2022-07-11 23:57:03,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:57:03,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272758136] [2022-07-11 23:57:03,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:57:03,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:57:03,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:57:03,620 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 146 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-07-11 23:57:03,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:57:03,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272758136] [2022-07-11 23:57:03,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272758136] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:57:03,620 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:57:03,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:57:03,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537825485] [2022-07-11 23:57:03,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:57:03,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:57:03,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:57:03,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:57:03,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:57:03,622 INFO L87 Difference]: Start difference. First operand 1005 states and 1490 transitions. Second operand has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:57:05,082 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:57:05,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:57:05,366 INFO L93 Difference]: Finished difference Result 2138 states and 3157 transitions. [2022-07-11 23:57:05,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:57:05,366 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 151 [2022-07-11 23:57:05,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:57:05,369 INFO L225 Difference]: With dead ends: 2138 [2022-07-11 23:57:05,369 INFO L226 Difference]: Without dead ends: 1156 [2022-07-11 23:57:05,370 INFO L412 NwaCegarLoop]: 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 [2022-07-11 23:57:05,370 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 119 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-11 23:57:05,370 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 360 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-07-11 23:57:05,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1156 states. [2022-07-11 23:57:05,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1156 to 1005. [2022-07-11 23:57:05,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1005 states, 1004 states have (on average 1.4760956175298805) internal successors, (1482), 1004 states have internal predecessors, (1482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:57:05,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1005 states to 1005 states and 1482 transitions. [2022-07-11 23:57:05,387 INFO L78 Accepts]: Start accepts. Automaton has 1005 states and 1482 transitions. Word has length 151 [2022-07-11 23:57:05,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:57:05,387 INFO L495 AbstractCegarLoop]: Abstraction has 1005 states and 1482 transitions. [2022-07-11 23:57:05,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:57:05,387 INFO L276 IsEmpty]: Start isEmpty. Operand 1005 states and 1482 transitions. [2022-07-11 23:57:05,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-07-11 23:57:05,388 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:57:05,388 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:57:05,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-07-11 23:57:05,389 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:57:05,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:57:05,389 INFO L85 PathProgramCache]: Analyzing trace with hash -766351414, now seen corresponding path program 1 times [2022-07-11 23:57:05,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:57:05,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756911454] [2022-07-11 23:57:05,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:57:05,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:57:05,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:57:05,501 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 137 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-11 23:57:05,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:57:05,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756911454] [2022-07-11 23:57:05,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756911454] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:57:05,502 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:57:05,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-11 23:57:05,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294859764] [2022-07-11 23:57:05,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:57:05,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-11 23:57:05,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:57:05,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-11 23:57:05,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:57:05,502 INFO L87 Difference]: Start difference. First operand 1005 states and 1482 transitions. Second operand has 5 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:57:07,157 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:57:07,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:57:07,552 INFO L93 Difference]: Finished difference Result 2589 states and 3813 transitions. [2022-07-11 23:57:07,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-11 23:57:07,552 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 152 [2022-07-11 23:57:07,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:57:07,557 INFO L225 Difference]: With dead ends: 2589 [2022-07-11 23:57:07,557 INFO L226 Difference]: Without dead ends: 1607 [2022-07-11 23:57:07,558 INFO L412 NwaCegarLoop]: 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 [2022-07-11 23:57:07,558 INFO L413 NwaCegarLoop]: 259 mSDtfsCounter, 91 mSDsluCounter, 548 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 807 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-11 23:57:07,559 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 807 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 432 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-07-11 23:57:07,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1607 states. [2022-07-11 23:57:07,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1607 to 1566. [2022-07-11 23:57:07,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1566 states, 1565 states have (on average 1.476038338658147) internal successors, (2310), 1565 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:57:07,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1566 states to 1566 states and 2310 transitions. [2022-07-11 23:57:07,587 INFO L78 Accepts]: Start accepts. Automaton has 1566 states and 2310 transitions. Word has length 152 [2022-07-11 23:57:07,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:57:07,587 INFO L495 AbstractCegarLoop]: Abstraction has 1566 states and 2310 transitions. [2022-07-11 23:57:07,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:57:07,587 INFO L276 IsEmpty]: Start isEmpty. Operand 1566 states and 2310 transitions. [2022-07-11 23:57:07,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-07-11 23:57:07,589 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:57:07,589 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:57:07,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-07-11 23:57:07,590 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:57:07,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:57:07,590 INFO L85 PathProgramCache]: Analyzing trace with hash -798111862, now seen corresponding path program 1 times [2022-07-11 23:57:07,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:57:07,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760634304] [2022-07-11 23:57:07,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:57:07,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:57:07,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:57:07,691 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 124 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-11 23:57:07,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:57:07,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760634304] [2022-07-11 23:57:07,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760634304] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:57:07,692 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:57:07,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:57:07,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388403820] [2022-07-11 23:57:07,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:57:07,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:57:07,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:57:07,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:57:07,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:57:07,693 INFO L87 Difference]: Start difference. First operand 1566 states and 2310 transitions. Second operand has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:57:08,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:57:08,476 INFO L93 Difference]: Finished difference Result 3154 states and 4650 transitions. [2022-07-11 23:57:08,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:57:08,476 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 153 [2022-07-11 23:57:08,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:57:08,480 INFO L225 Difference]: With dead ends: 3154 [2022-07-11 23:57:08,480 INFO L226 Difference]: Without dead ends: 1611 [2022-07-11 23:57:08,482 INFO L412 NwaCegarLoop]: 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 [2022-07-11 23:57:08,482 INFO L413 NwaCegarLoop]: 208 mSDtfsCounter, 45 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-11 23:57:08,482 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 529 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-11 23:57:08,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1611 states. [2022-07-11 23:57:08,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1611 to 1566. [2022-07-11 23:57:08,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1566 states, 1565 states have (on average 1.4741214057507988) internal successors, (2307), 1565 states have internal predecessors, (2307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:57:08,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1566 states to 1566 states and 2307 transitions. [2022-07-11 23:57:08,508 INFO L78 Accepts]: Start accepts. Automaton has 1566 states and 2307 transitions. Word has length 153 [2022-07-11 23:57:08,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:57:08,509 INFO L495 AbstractCegarLoop]: Abstraction has 1566 states and 2307 transitions. [2022-07-11 23:57:08,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:57:08,509 INFO L276 IsEmpty]: Start isEmpty. Operand 1566 states and 2307 transitions. [2022-07-11 23:57:08,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-07-11 23:57:08,511 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:57:08,511 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:57:08,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-07-11 23:57:08,511 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:57:08,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:57:08,512 INFO L85 PathProgramCache]: Analyzing trace with hash 135689437, now seen corresponding path program 1 times [2022-07-11 23:57:08,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:57:08,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829079349] [2022-07-11 23:57:08,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:57:08,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:57:08,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:57:08,589 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-11 23:57:08,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:57:08,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829079349] [2022-07-11 23:57:08,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829079349] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:57:08,589 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:57:08,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:57:08,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946187285] [2022-07-11 23:57:08,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:57:08,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:57:08,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:57:08,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:57:08,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:57:08,591 INFO L87 Difference]: Start difference. First operand 1566 states and 2307 transitions. Second operand has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:57:10,467 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:57:10,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:57:10,777 INFO L93 Difference]: Finished difference Result 3501 states and 5140 transitions. [2022-07-11 23:57:10,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:57:10,777 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 158 [2022-07-11 23:57:10,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:57:10,782 INFO L225 Difference]: With dead ends: 3501 [2022-07-11 23:57:10,782 INFO L226 Difference]: Without dead ends: 1958 [2022-07-11 23:57:10,784 INFO L412 NwaCegarLoop]: 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 [2022-07-11 23:57:10,784 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 128 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:57:10,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 424 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-07-11 23:57:10,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1958 states. [2022-07-11 23:57:10,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1958 to 1670. [2022-07-11 23:57:10,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1670 states, 1669 states have (on average 1.4619532654284002) internal successors, (2440), 1669 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:57:10,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1670 states to 1670 states and 2440 transitions. [2022-07-11 23:57:10,815 INFO L78 Accepts]: Start accepts. Automaton has 1670 states and 2440 transitions. Word has length 158 [2022-07-11 23:57:10,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:57:10,815 INFO L495 AbstractCegarLoop]: Abstraction has 1670 states and 2440 transitions. [2022-07-11 23:57:10,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:57:10,815 INFO L276 IsEmpty]: Start isEmpty. Operand 1670 states and 2440 transitions. [2022-07-11 23:57:10,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-07-11 23:57:10,817 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:57:10,817 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:57:10,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-07-11 23:57:10,818 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:57:10,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:57:10,818 INFO L85 PathProgramCache]: Analyzing trace with hash -525467457, now seen corresponding path program 1 times [2022-07-11 23:57:10,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:57:10,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747956222] [2022-07-11 23:57:10,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:57:10,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:57:10,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:57:10,895 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 128 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-11 23:57:10,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:57:10,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747956222] [2022-07-11 23:57:10,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747956222] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:57:10,896 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:57:10,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:57:10,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122541615] [2022-07-11 23:57:10,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:57:10,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:57:10,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:57:10,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:57:10,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:57:10,897 INFO L87 Difference]: Start difference. First operand 1670 states and 2440 transitions. Second operand has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:57:12,585 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:57:12,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:57:12,849 INFO L93 Difference]: Finished difference Result 3356 states and 4901 transitions. [2022-07-11 23:57:12,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:57:12,849 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 159 [2022-07-11 23:57:12,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:57:12,852 INFO L225 Difference]: With dead ends: 3356 [2022-07-11 23:57:12,853 INFO L226 Difference]: Without dead ends: 1709 [2022-07-11 23:57:12,854 INFO L412 NwaCegarLoop]: 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 [2022-07-11 23:57:12,854 INFO L413 NwaCegarLoop]: 211 mSDtfsCounter, 40 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-07-11 23:57:12,854 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 535 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-07-11 23:57:12,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1709 states. [2022-07-11 23:57:12,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1709 to 1670. [2022-07-11 23:57:12,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1670 states, 1669 states have (on average 1.4601557819053326) internal successors, (2437), 1669 states have internal predecessors, (2437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:57:12,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1670 states to 1670 states and 2437 transitions. [2022-07-11 23:57:12,881 INFO L78 Accepts]: Start accepts. Automaton has 1670 states and 2437 transitions. Word has length 159 [2022-07-11 23:57:12,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:57:12,882 INFO L495 AbstractCegarLoop]: Abstraction has 1670 states and 2437 transitions. [2022-07-11 23:57:12,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:57:12,882 INFO L276 IsEmpty]: Start isEmpty. Operand 1670 states and 2437 transitions. [2022-07-11 23:57:12,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-07-11 23:57:12,884 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:57:12,884 INFO L195 NwaCegarLoop]: 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, 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] [2022-07-11 23:57:12,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-07-11 23:57:12,884 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:57:12,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:57:12,885 INFO L85 PathProgramCache]: Analyzing trace with hash -47827101, now seen corresponding path program 1 times [2022-07-11 23:57:12,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:57:12,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178967775] [2022-07-11 23:57:12,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:57:12,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:57:12,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:57:12,957 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 140 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-11 23:57:12,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:57:12,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178967775] [2022-07-11 23:57:12,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178967775] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:57:12,958 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:57:12,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:57:12,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280386046] [2022-07-11 23:57:12,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:57:12,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:57:12,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:57:12,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:57:12,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:57:12,959 INFO L87 Difference]: Start difference. First operand 1670 states and 2437 transitions. Second operand has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:57:13,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:57:13,621 INFO L93 Difference]: Finished difference Result 3356 states and 4895 transitions. [2022-07-11 23:57:13,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:57:13,623 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 161 [2022-07-11 23:57:13,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:57:13,626 INFO L225 Difference]: With dead ends: 3356 [2022-07-11 23:57:13,626 INFO L226 Difference]: Without dead ends: 1709 [2022-07-11 23:57:13,627 INFO L412 NwaCegarLoop]: 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 [2022-07-11 23:57:13,628 INFO L413 NwaCegarLoop]: 211 mSDtfsCounter, 33 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-11 23:57:13,628 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 535 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-11 23:57:13,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1709 states. [2022-07-11 23:57:13,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1709 to 1670. [2022-07-11 23:57:13,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1670 states, 1669 states have (on average 1.458358298382265) internal successors, (2434), 1669 states have internal predecessors, (2434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:57:13,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1670 states to 1670 states and 2434 transitions. [2022-07-11 23:57:13,664 INFO L78 Accepts]: Start accepts. Automaton has 1670 states and 2434 transitions. Word has length 161 [2022-07-11 23:57:13,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:57:13,664 INFO L495 AbstractCegarLoop]: Abstraction has 1670 states and 2434 transitions. [2022-07-11 23:57:13,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:57:13,665 INFO L276 IsEmpty]: Start isEmpty. Operand 1670 states and 2434 transitions. [2022-07-11 23:57:13,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-07-11 23:57:13,666 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:57:13,666 INFO L195 NwaCegarLoop]: 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, 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] [2022-07-11 23:57:13,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-07-11 23:57:13,667 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:57:13,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:57:13,667 INFO L85 PathProgramCache]: Analyzing trace with hash -592497818, now seen corresponding path program 1 times [2022-07-11 23:57:13,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:57:13,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734321977] [2022-07-11 23:57:13,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:57:13,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:57:13,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:57:13,749 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 142 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-11 23:57:13,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:57:13,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734321977] [2022-07-11 23:57:13,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734321977] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:57:13,749 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:57:13,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:57:13,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433749957] [2022-07-11 23:57:13,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:57:13,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:57:13,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:57:13,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:57:13,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:57:13,750 INFO L87 Difference]: Start difference. First operand 1670 states and 2434 transitions. Second operand has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:57:14,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:57:14,175 INFO L93 Difference]: Finished difference Result 3344 states and 4874 transitions. [2022-07-11 23:57:14,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:57:14,176 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 162 [2022-07-11 23:57:14,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:57:14,179 INFO L225 Difference]: With dead ends: 3344 [2022-07-11 23:57:14,179 INFO L226 Difference]: Without dead ends: 1697 [2022-07-11 23:57:14,181 INFO L412 NwaCegarLoop]: 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 [2022-07-11 23:57:14,181 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 28 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 539 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-11 23:57:14,181 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 539 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-11 23:57:14,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1697 states. [2022-07-11 23:57:14,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1697 to 1659. [2022-07-11 23:57:14,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1659 states, 1658 states have (on average 1.459589867310012) internal successors, (2420), 1658 states have internal predecessors, (2420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:57:14,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1659 states to 1659 states and 2420 transitions. [2022-07-11 23:57:14,210 INFO L78 Accepts]: Start accepts. Automaton has 1659 states and 2420 transitions. Word has length 162 [2022-07-11 23:57:14,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:57:14,210 INFO L495 AbstractCegarLoop]: Abstraction has 1659 states and 2420 transitions. [2022-07-11 23:57:14,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:57:14,211 INFO L276 IsEmpty]: Start isEmpty. Operand 1659 states and 2420 transitions. [2022-07-11 23:57:14,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-07-11 23:57:14,212 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:57:14,212 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:57:14,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-07-11 23:57:14,213 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:57:14,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:57:14,213 INFO L85 PathProgramCache]: Analyzing trace with hash 114861044, now seen corresponding path program 1 times [2022-07-11 23:57:14,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:57:14,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83762906] [2022-07-11 23:57:14,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:57:14,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:57:14,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:57:14,295 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 183 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-07-11 23:57:14,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:57:14,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83762906] [2022-07-11 23:57:14,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83762906] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:57:14,295 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:57:14,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:57:14,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824695670] [2022-07-11 23:57:14,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:57:14,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:57:14,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:57:14,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:57:14,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:57:14,297 INFO L87 Difference]: Start difference. First operand 1659 states and 2420 transitions. Second operand has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:57:15,330 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:57:15,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:57:15,532 INFO L93 Difference]: Finished difference Result 3369 states and 4905 transitions. [2022-07-11 23:57:15,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:57:15,532 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 163 [2022-07-11 23:57:15,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:57:15,535 INFO L225 Difference]: With dead ends: 3369 [2022-07-11 23:57:15,535 INFO L226 Difference]: Without dead ends: 1733 [2022-07-11 23:57:15,537 INFO L412 NwaCegarLoop]: 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 [2022-07-11 23:57:15,537 INFO L413 NwaCegarLoop]: 230 mSDtfsCounter, 36 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 572 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-11 23:57:15,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 572 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-11 23:57:15,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1733 states. [2022-07-11 23:57:15,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1733 to 1659. [2022-07-11 23:57:15,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1659 states, 1658 states have (on average 1.457177322074789) internal successors, (2416), 1658 states have internal predecessors, (2416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:57:15,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1659 states to 1659 states and 2416 transitions. [2022-07-11 23:57:15,565 INFO L78 Accepts]: Start accepts. Automaton has 1659 states and 2416 transitions. Word has length 163 [2022-07-11 23:57:15,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:57:15,565 INFO L495 AbstractCegarLoop]: Abstraction has 1659 states and 2416 transitions. [2022-07-11 23:57:15,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:57:15,565 INFO L276 IsEmpty]: Start isEmpty. Operand 1659 states and 2416 transitions. [2022-07-11 23:57:15,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-07-11 23:57:15,566 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:57:15,567 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:57:15,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-07-11 23:57:15,567 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:57:15,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:57:15,567 INFO L85 PathProgramCache]: Analyzing trace with hash 2089762457, now seen corresponding path program 1 times [2022-07-11 23:57:15,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:57:15,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066884439] [2022-07-11 23:57:15,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:57:15,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:57:15,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:57:15,662 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 96 proven. 0 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-07-11 23:57:15,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:57:15,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066884439] [2022-07-11 23:57:15,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066884439] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:57:15,662 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:57:15,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-11 23:57:15,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919157432] [2022-07-11 23:57:15,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:57:15,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-11 23:57:15,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:57:15,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-11 23:57:15,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 23:57:15,664 INFO L87 Difference]: Start difference. First operand 1659 states and 2416 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:57:15,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:57:15,726 INFO L93 Difference]: Finished difference Result 4070 states and 5950 transitions. [2022-07-11 23:57:15,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-11 23:57:15,727 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 168 [2022-07-11 23:57:15,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:57:15,731 INFO L225 Difference]: With dead ends: 4070 [2022-07-11 23:57:15,731 INFO L226 Difference]: Without dead ends: 2434 [2022-07-11 23:57:15,733 INFO L412 NwaCegarLoop]: 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 [2022-07-11 23:57:15,733 INFO L413 NwaCegarLoop]: 380 mSDtfsCounter, 143 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 569 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 23:57:15,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 569 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 23:57:15,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2434 states. [2022-07-11 23:57:15,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2434 to 2434. [2022-07-11 23:57:15,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2434 states, 2433 states have (on average 1.4562268803945746) internal successors, (3543), 2433 states have internal predecessors, (3543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:57:15,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2434 states to 2434 states and 3543 transitions. [2022-07-11 23:57:15,775 INFO L78 Accepts]: Start accepts. Automaton has 2434 states and 3543 transitions. Word has length 168 [2022-07-11 23:57:15,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:57:15,775 INFO L495 AbstractCegarLoop]: Abstraction has 2434 states and 3543 transitions. [2022-07-11 23:57:15,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:57:15,776 INFO L276 IsEmpty]: Start isEmpty. Operand 2434 states and 3543 transitions. [2022-07-11 23:57:15,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-07-11 23:57:15,778 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:57:15,778 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:57:15,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-07-11 23:57:15,778 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:57:15,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:57:15,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1750755814, now seen corresponding path program 1 times [2022-07-11 23:57:15,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:57:15,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935797932] [2022-07-11 23:57:15,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:57:15,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:57:15,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:57:15,884 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 131 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-07-11 23:57:15,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:57:15,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935797932] [2022-07-11 23:57:15,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935797932] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:57:15,885 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:57:15,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:57:15,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398662905] [2022-07-11 23:57:15,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:57:15,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:57:15,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:57:15,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:57:15,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:57:15,886 INFO L87 Difference]: Start difference. First operand 2434 states and 3543 transitions. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:57:16,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:57:16,318 INFO L93 Difference]: Finished difference Result 4925 states and 7158 transitions. [2022-07-11 23:57:16,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:57:16,319 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 168 [2022-07-11 23:57:16,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:57:16,324 INFO L225 Difference]: With dead ends: 4925 [2022-07-11 23:57:16,324 INFO L226 Difference]: Without dead ends: 2514 [2022-07-11 23:57:16,326 INFO L412 NwaCegarLoop]: 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 [2022-07-11 23:57:16,327 INFO L413 NwaCegarLoop]: 237 mSDtfsCounter, 41 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 585 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-11 23:57:16,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 585 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-11 23:57:16,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2514 states. [2022-07-11 23:57:16,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2514 to 2434. [2022-07-11 23:57:16,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2434 states, 2433 states have (on average 1.4537607891491986) internal successors, (3537), 2433 states have internal predecessors, (3537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:57:16,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2434 states to 2434 states and 3537 transitions. [2022-07-11 23:57:16,369 INFO L78 Accepts]: Start accepts. Automaton has 2434 states and 3537 transitions. Word has length 168 [2022-07-11 23:57:16,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:57:16,369 INFO L495 AbstractCegarLoop]: Abstraction has 2434 states and 3537 transitions. [2022-07-11 23:57:16,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:57:16,370 INFO L276 IsEmpty]: Start isEmpty. Operand 2434 states and 3537 transitions. [2022-07-11 23:57:16,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-07-11 23:57:16,372 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:57:16,372 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:57:16,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-07-11 23:57:16,373 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:57:16,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:57:16,373 INFO L85 PathProgramCache]: Analyzing trace with hash 915392013, now seen corresponding path program 1 times [2022-07-11 23:57:16,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:57:16,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062769142] [2022-07-11 23:57:16,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:57:16,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:57:16,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:57:16,453 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 160 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-07-11 23:57:16,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:57:16,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062769142] [2022-07-11 23:57:16,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062769142] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:57:16,453 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:57:16,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-11 23:57:16,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701283093] [2022-07-11 23:57:16,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:57:16,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-11 23:57:16,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:57:16,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-11 23:57:16,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 23:57:16,454 INFO L87 Difference]: Start difference. First operand 2434 states and 3537 transitions. Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:57:16,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:57:16,534 INFO L93 Difference]: Finished difference Result 5582 states and 8132 transitions. [2022-07-11 23:57:16,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-11 23:57:16,535 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 169 [2022-07-11 23:57:16,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:57:16,539 INFO L225 Difference]: With dead ends: 5582 [2022-07-11 23:57:16,539 INFO L226 Difference]: Without dead ends: 3171 [2022-07-11 23:57:16,541 INFO L412 NwaCegarLoop]: 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 [2022-07-11 23:57:16,541 INFO L413 NwaCegarLoop]: 319 mSDtfsCounter, 136 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 23:57:16,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 508 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 23:57:16,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3171 states. [2022-07-11 23:57:16,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3171 to 3161. [2022-07-11 23:57:16,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3161 states, 3160 states have (on average 1.454746835443038) internal successors, (4597), 3160 states have internal predecessors, (4597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:57:16,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3161 states to 3161 states and 4597 transitions. [2022-07-11 23:57:16,595 INFO L78 Accepts]: Start accepts. Automaton has 3161 states and 4597 transitions. Word has length 169 [2022-07-11 23:57:16,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:57:16,595 INFO L495 AbstractCegarLoop]: Abstraction has 3161 states and 4597 transitions. [2022-07-11 23:57:16,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:57:16,596 INFO L276 IsEmpty]: Start isEmpty. Operand 3161 states and 4597 transitions. [2022-07-11 23:57:16,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2022-07-11 23:57:16,598 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:57:16,598 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:57:16,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-07-11 23:57:16,598 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:57:16,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:57:16,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1483275254, now seen corresponding path program 1 times [2022-07-11 23:57:16,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:57:16,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750898308] [2022-07-11 23:57:16,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:57:16,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:57:16,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:57:16,691 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 170 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-07-11 23:57:16,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:57:16,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750898308] [2022-07-11 23:57:16,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750898308] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:57:16,691 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:57:16,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:57:16,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613723721] [2022-07-11 23:57:16,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:57:16,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:57:16,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:57:16,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:57:16,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:57:16,693 INFO L87 Difference]: Start difference. First operand 3161 states and 4597 transitions. Second operand has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:57:17,981 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:57:18,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:57:18,320 INFO L93 Difference]: Finished difference Result 6706 states and 9725 transitions. [2022-07-11 23:57:18,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:57:18,320 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2022-07-11 23:57:18,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:57:18,326 INFO L225 Difference]: With dead ends: 6706 [2022-07-11 23:57:18,326 INFO L226 Difference]: Without dead ends: 3568 [2022-07-11 23:57:18,329 INFO L412 NwaCegarLoop]: 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 [2022-07-11 23:57:18,329 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 110 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-11 23:57:18,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 429 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-11 23:57:18,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3568 states. [2022-07-11 23:57:18,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3568 to 3293. [2022-07-11 23:57:18,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3293 states, 3292 states have (on average 1.4541312272174969) internal successors, (4787), 3292 states have internal predecessors, (4787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:57:18,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3293 states to 3293 states and 4787 transitions. [2022-07-11 23:57:18,391 INFO L78 Accepts]: Start accepts. Automaton has 3293 states and 4787 transitions. Word has length 180 [2022-07-11 23:57:18,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:57:18,391 INFO L495 AbstractCegarLoop]: Abstraction has 3293 states and 4787 transitions. [2022-07-11 23:57:18,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:57:18,391 INFO L276 IsEmpty]: Start isEmpty. Operand 3293 states and 4787 transitions. [2022-07-11 23:57:18,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-07-11 23:57:18,394 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:57:18,394 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:57:18,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-07-11 23:57:18,394 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:57:18,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:57:18,395 INFO L85 PathProgramCache]: Analyzing trace with hash 173334601, now seen corresponding path program 1 times [2022-07-11 23:57:18,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:57:18,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063774324] [2022-07-11 23:57:18,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:57:18,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:57:18,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:57:18,506 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 159 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-07-11 23:57:18,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:57:18,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063774324] [2022-07-11 23:57:18,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063774324] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:57:18,507 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:57:18,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:57:18,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097915035] [2022-07-11 23:57:18,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:57:18,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:57:18,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:57:18,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:57:18,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:57:18,508 INFO L87 Difference]: Start difference. First operand 3293 states and 4787 transitions. Second operand has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:57:19,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:57:19,544 INFO L93 Difference]: Finished difference Result 6741 states and 9777 transitions. [2022-07-11 23:57:19,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:57:19,545 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 181 [2022-07-11 23:57:19,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:57:19,556 INFO L225 Difference]: With dead ends: 6741 [2022-07-11 23:57:19,556 INFO L226 Difference]: Without dead ends: 3471 [2022-07-11 23:57:19,560 INFO L412 NwaCegarLoop]: 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 [2022-07-11 23:57:19,560 INFO L413 NwaCegarLoop]: 239 mSDtfsCounter, 46 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 590 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-11 23:57:19,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 590 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-11 23:57:19,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3471 states. [2022-07-11 23:57:19,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3471 to 3293. [2022-07-11 23:57:19,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3293 states, 3292 states have (on average 1.4517010935601458) internal successors, (4779), 3292 states have internal predecessors, (4779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:57:19,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3293 states to 3293 states and 4779 transitions. [2022-07-11 23:57:19,623 INFO L78 Accepts]: Start accepts. Automaton has 3293 states and 4779 transitions. Word has length 181 [2022-07-11 23:57:19,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:57:19,623 INFO L495 AbstractCegarLoop]: Abstraction has 3293 states and 4779 transitions. [2022-07-11 23:57:19,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:57:19,624 INFO L276 IsEmpty]: Start isEmpty. Operand 3293 states and 4779 transitions. [2022-07-11 23:57:19,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-07-11 23:57:19,626 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:57:19,627 INFO L195 NwaCegarLoop]: 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, 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] [2022-07-11 23:57:19,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-07-11 23:57:19,627 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:57:19,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:57:19,627 INFO L85 PathProgramCache]: Analyzing trace with hash -1975413238, now seen corresponding path program 1 times [2022-07-11 23:57:19,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:57:19,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988714534] [2022-07-11 23:57:19,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:57:19,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:57:19,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:57:19,734 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 223 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-07-11 23:57:19,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:57:19,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988714534] [2022-07-11 23:57:19,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988714534] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:57:19,734 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:57:19,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:57:19,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028338443] [2022-07-11 23:57:19,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:57:19,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:57:19,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:57:19,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:57:19,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:57:19,736 INFO L87 Difference]: Start difference. First operand 3293 states and 4779 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) [2022-07-11 23:57:20,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:57:20,380 INFO L93 Difference]: Finished difference Result 6847 states and 9909 transitions. [2022-07-11 23:57:20,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:57:20,381 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 182 [2022-07-11 23:57:20,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:57:20,386 INFO L225 Difference]: With dead ends: 6847 [2022-07-11 23:57:20,387 INFO L226 Difference]: Without dead ends: 3577 [2022-07-11 23:57:20,390 INFO L412 NwaCegarLoop]: 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 [2022-07-11 23:57:20,390 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 122 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-11 23:57:20,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 360 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-11 23:57:20,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3577 states. [2022-07-11 23:57:20,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3577 to 3293. [2022-07-11 23:57:20,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3293 states, 3292 states have (on average 1.4413730255164034) internal successors, (4745), 3292 states have internal predecessors, (4745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:57:20,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3293 states to 3293 states and 4745 transitions. [2022-07-11 23:57:20,457 INFO L78 Accepts]: Start accepts. Automaton has 3293 states and 4745 transitions. Word has length 182 [2022-07-11 23:57:20,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:57:20,458 INFO L495 AbstractCegarLoop]: Abstraction has 3293 states and 4745 transitions. [2022-07-11 23:57:20,458 INFO L496 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) [2022-07-11 23:57:20,458 INFO L276 IsEmpty]: Start isEmpty. Operand 3293 states and 4745 transitions. [2022-07-11 23:57:20,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-07-11 23:57:20,461 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:57:20,461 INFO L195 NwaCegarLoop]: 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, 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] [2022-07-11 23:57:20,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-07-11 23:57:20,461 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:57:20,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:57:20,462 INFO L85 PathProgramCache]: Analyzing trace with hash -549078759, now seen corresponding path program 1 times [2022-07-11 23:57:20,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:57:20,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439321950] [2022-07-11 23:57:20,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:57:20,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:57:20,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:57:20,552 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 240 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-07-11 23:57:20,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:57:20,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439321950] [2022-07-11 23:57:20,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439321950] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:57:20,553 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:57:20,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:57:20,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424444156] [2022-07-11 23:57:20,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:57:20,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:57:20,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:57:20,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:57:20,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:57:20,554 INFO L87 Difference]: Start difference. First operand 3293 states and 4745 transitions. Second operand has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:57:21,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:57:21,377 INFO L93 Difference]: Finished difference Result 7320 states and 10512 transitions. [2022-07-11 23:57:21,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:57:21,378 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 191 [2022-07-11 23:57:21,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:57:21,383 INFO L225 Difference]: With dead ends: 7320 [2022-07-11 23:57:21,383 INFO L226 Difference]: Without dead ends: 4050 [2022-07-11 23:57:21,386 INFO L412 NwaCegarLoop]: 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 [2022-07-11 23:57:21,386 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 116 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-11 23:57:21,387 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 370 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-11 23:57:21,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4050 states. [2022-07-11 23:57:21,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4050 to 3573. [2022-07-11 23:57:21,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3573 states, 3572 states have (on average 1.4372900335946248) internal successors, (5134), 3572 states have internal predecessors, (5134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:57:21,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3573 states to 3573 states and 5134 transitions. [2022-07-11 23:57:21,483 INFO L78 Accepts]: Start accepts. Automaton has 3573 states and 5134 transitions. Word has length 191 [2022-07-11 23:57:21,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:57:21,484 INFO L495 AbstractCegarLoop]: Abstraction has 3573 states and 5134 transitions. [2022-07-11 23:57:21,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:57:21,484 INFO L276 IsEmpty]: Start isEmpty. Operand 3573 states and 5134 transitions. [2022-07-11 23:57:21,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2022-07-11 23:57:21,487 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:57:21,487 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:57:21,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-07-11 23:57:21,487 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:57:21,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:57:21,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1485485231, now seen corresponding path program 1 times [2022-07-11 23:57:21,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:57:21,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164521085] [2022-07-11 23:57:21,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:57:21,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:57:21,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:57:21,950 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2022-07-11 23:57:21,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:57:21,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164521085] [2022-07-11 23:57:21,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164521085] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:57:21,951 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:57:21,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-11 23:57:21,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690830968] [2022-07-11 23:57:21,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:57:21,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-11 23:57:21,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:57:21,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-11 23:57:21,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:57:21,952 INFO L87 Difference]: Start difference. First operand 3573 states and 5134 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 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) [2022-07-11 23:57:23,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:57:23,773 INFO L93 Difference]: Finished difference Result 7143 states and 10264 transitions. [2022-07-11 23:57:23,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-11 23:57:23,774 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 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 193 [2022-07-11 23:57:23,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:57:23,777 INFO L225 Difference]: With dead ends: 7143 [2022-07-11 23:57:23,778 INFO L226 Difference]: Without dead ends: 3573 [2022-07-11 23:57:23,780 INFO L412 NwaCegarLoop]: 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 [2022-07-11 23:57:23,781 INFO L413 NwaCegarLoop]: 212 mSDtfsCounter, 7 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 695 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-11 23:57:23,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 695 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-07-11 23:57:23,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3573 states. [2022-07-11 23:57:23,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3573 to 3573. [2022-07-11 23:57:23,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3573 states, 3572 states have (on average 1.437010078387458) internal successors, (5133), 3572 states have internal predecessors, (5133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:57:23,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3573 states to 3573 states and 5133 transitions. [2022-07-11 23:57:23,845 INFO L78 Accepts]: Start accepts. Automaton has 3573 states and 5133 transitions. Word has length 193 [2022-07-11 23:57:23,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:57:23,846 INFO L495 AbstractCegarLoop]: Abstraction has 3573 states and 5133 transitions. [2022-07-11 23:57:23,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 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) [2022-07-11 23:57:23,846 INFO L276 IsEmpty]: Start isEmpty. Operand 3573 states and 5133 transitions. [2022-07-11 23:57:23,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2022-07-11 23:57:23,848 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:57:23,849 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:57:23,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-07-11 23:57:23,849 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:57:23,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:57:23,849 INFO L85 PathProgramCache]: Analyzing trace with hash -299918031, now seen corresponding path program 1 times [2022-07-11 23:57:23,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:57:23,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335494402] [2022-07-11 23:57:23,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:57:23,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:57:24,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:57:24,862 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 0 proven. 209 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2022-07-11 23:57:24,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:57:24,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335494402] [2022-07-11 23:57:24,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335494402] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:57:24,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435683762] [2022-07-11 23:57:24,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:57:24,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:57:24,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:57:24,865 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) [2022-07-11 23:57:24,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-11 23:57:25,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:57:26,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 1227 conjuncts, 178 conjunts are in the unsatisfiable core [2022-07-11 23:57:26,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:57:26,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:57:28,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:57:30,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:57:39,667 INFO L190 IndexEqualityManager]: detected not equals via solver