./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 35987657 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-?-3598765 [2022-07-20 22:41:45,875 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-20 22:41:45,878 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-20 22:41:45,918 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-20 22:41:45,919 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-20 22:41:45,920 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-20 22:41:45,924 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-20 22:41:45,927 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-20 22:41:45,929 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-20 22:41:45,933 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-20 22:41:45,934 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-20 22:41:45,936 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-20 22:41:45,936 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-20 22:41:45,938 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-20 22:41:45,939 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-20 22:41:45,944 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-20 22:41:45,945 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-20 22:41:45,947 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-20 22:41:45,948 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-20 22:41:45,954 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-20 22:41:45,955 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-20 22:41:45,956 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-20 22:41:45,957 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-20 22:41:45,958 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-20 22:41:45,960 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-20 22:41:45,966 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-20 22:41:45,966 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-20 22:41:45,967 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-20 22:41:45,967 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-20 22:41:45,968 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-20 22:41:45,969 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-20 22:41:45,969 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-20 22:41:45,971 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-20 22:41:45,971 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-20 22:41:45,972 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-20 22:41:45,973 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-20 22:41:45,974 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-20 22:41:45,974 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-20 22:41:45,974 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-20 22:41:45,974 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-20 22:41:45,975 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-20 22:41:45,976 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-20 22:41:45,981 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-20 22:41:46,013 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-20 22:41:46,014 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-20 22:41:46,014 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-20 22:41:46,014 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-20 22:41:46,015 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-20 22:41:46,015 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-20 22:41:46,016 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-20 22:41:46,016 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-20 22:41:46,016 INFO L138 SettingsManager]: * Use SBE=true [2022-07-20 22:41:46,017 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-20 22:41:46,017 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-20 22:41:46,018 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-20 22:41:46,018 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-20 22:41:46,018 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-20 22:41:46,018 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-20 22:41:46,019 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-20 22:41:46,028 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-20 22:41:46,028 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-20 22:41:46,028 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-20 22:41:46,029 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-20 22:41:46,029 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-20 22:41:46,029 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-20 22:41:46,029 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-20 22:41:46,030 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-20 22:41:46,030 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 22:41:46,030 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-20 22:41:46,030 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-20 22:41:46,030 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-20 22:41:46,031 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-20 22:41:46,031 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-20 22:41:46,031 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-20 22:41:46,031 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-20 22:41:46,032 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-20 22:41:46,032 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4d1a05335dcd475270df3d2b7e447bf62801b1b41377a4a2d9fc94b2523fc1ec [2022-07-20 22:41:46,319 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-20 22:41:46,344 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-20 22:41:46,347 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-20 22:41:46,348 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-20 22:41:46,348 INFO L275 PluginConnector]: CDTParser initialized [2022-07-20 22:41:46,350 INFO L432 ainManager$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 [2022-07-20 22:41:46,409 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f7804d68/23782953f7e143b78b662ebaf09ec6c2/FLAG14a4906a3 [2022-07-20 22:41:47,000 INFO L306 CDTParser]: Found 1 translation units. [2022-07-20 22:41:47,000 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/openssl/s3_srvr.blast.15.i.cil-1.c [2022-07-20 22:41:47,023 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f7804d68/23782953f7e143b78b662ebaf09ec6c2/FLAG14a4906a3 [2022-07-20 22:41:47,427 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f7804d68/23782953f7e143b78b662ebaf09ec6c2 [2022-07-20 22:41:47,429 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-20 22:41:47,430 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-20 22:41:47,433 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-20 22:41:47,434 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-20 22:41:47,437 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-20 22:41:47,437 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:41:47" (1/1) ... [2022-07-20 22:41:47,438 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f3d0d10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:41:47, skipping insertion in model container [2022-07-20 22:41:47,439 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:41:47" (1/1) ... [2022-07-20 22:41:47,447 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-20 22:41:47,516 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-20 22:41:47,830 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] [2022-07-20 22:41:47,839 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 22:41:47,866 INFO L203 MainTranslator]: Completed pre-run [2022-07-20 22:41:47,996 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] [2022-07-20 22:41:47,999 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 22:41:48,012 INFO L208 MainTranslator]: Completed translation [2022-07-20 22:41:48,013 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:41:48 WrapperNode [2022-07-20 22:41:48,013 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-20 22:41:48,014 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-20 22:41:48,014 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-20 22:41:48,014 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-20 22:41:48,020 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:41:48" (1/1) ... [2022-07-20 22:41:48,038 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:41:48" (1/1) ... [2022-07-20 22:41:48,078 INFO L137 Inliner]: procedures = 31, calls = 223, calls flagged for inlining = 7, calls inlined = 3, statements flattened = 799 [2022-07-20 22:41:48,079 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-20 22:41:48,080 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-20 22:41:48,080 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-20 22:41:48,080 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-20 22:41:48,087 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:41:48" (1/1) ... [2022-07-20 22:41:48,087 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:41:48" (1/1) ... [2022-07-20 22:41:48,095 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:41:48" (1/1) ... [2022-07-20 22:41:48,095 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:41:48" (1/1) ... [2022-07-20 22:41:48,139 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:41:48" (1/1) ... [2022-07-20 22:41:48,145 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:41:48" (1/1) ... [2022-07-20 22:41:48,148 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:41:48" (1/1) ... [2022-07-20 22:41:48,160 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-20 22:41:48,164 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-20 22:41:48,165 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-20 22:41:48,165 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-20 22:41:48,166 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:41:48" (1/1) ... [2022-07-20 22:41:48,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 22:41:48,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:41:48,221 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) [2022-07-20 22:41:48,243 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 [2022-07-20 22:41:48,261 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-20 22:41:48,261 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-20 22:41:48,261 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-20 22:41:48,261 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-20 22:41:48,261 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-20 22:41:48,261 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-20 22:41:48,262 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-20 22:41:48,262 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-20 22:41:48,262 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-20 22:41:48,429 INFO L234 CfgBuilder]: Building ICFG [2022-07-20 22:41:48,430 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-20 22:41:48,445 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-20 22:41:49,483 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2022-07-20 22:41:49,484 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2022-07-20 22:41:49,484 INFO L275 CfgBuilder]: Performing block encoding [2022-07-20 22:41:49,490 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-20 22:41:49,490 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-20 22:41:49,492 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:41:49 BoogieIcfgContainer [2022-07-20 22:41:49,493 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-20 22:41:49,494 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-20 22:41:49,494 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-20 22:41:49,497 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-20 22:41:49,497 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 10:41:47" (1/3) ... [2022-07-20 22:41:49,498 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20707d49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:41:49, skipping insertion in model container [2022-07-20 22:41:49,498 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:41:48" (2/3) ... [2022-07-20 22:41:49,499 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20707d49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:41:49, skipping insertion in model container [2022-07-20 22:41:49,499 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:41:49" (3/3) ... [2022-07-20 22:41:49,500 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.15.i.cil-1.c [2022-07-20 22:41:49,513 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-20 22:41:49,513 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-20 22:41:49,558 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-20 22:41:49,565 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@13b7b12b, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@fe0e53a [2022-07-20 22:41:49,565 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-20 22:41:49,570 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) [2022-07-20 22:41:49,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-20 22:41:49,579 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:41:49,579 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] [2022-07-20 22:41:49,580 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:41:49,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:41:49,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1630857892, now seen corresponding path program 1 times [2022-07-20 22:41:49,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:41:49,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909579709] [2022-07-20 22:41:49,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:41:49,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:41:49,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:41:50,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:41:50,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:41:50,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909579709] [2022-07-20 22:41:50,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909579709] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:41:50,124 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:41:50,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:41:50,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949890652] [2022-07-20 22:41:50,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:41:50,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:41:50,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:41:50,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:41:50,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:41:50,155 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) [2022-07-20 22:41:51,828 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:41:52,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:41:52,412 INFO L93 Difference]: Finished difference Result 428 states and 730 transitions. [2022-07-20 22:41:52,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:41:52,416 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 [2022-07-20 22:41:52,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:41:52,436 INFO L225 Difference]: With dead ends: 428 [2022-07-20 22:41:52,437 INFO L226 Difference]: Without dead ends: 260 [2022-07-20 22:41:52,440 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 [2022-07-20 22:41:52,445 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 158 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s 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, 2.2s IncrementalHoareTripleChecker+Time [2022-07-20 22:41:52,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 459 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-07-20 22:41:52,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-07-20 22:41:52,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 180. [2022-07-20 22:41:52,495 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) [2022-07-20 22:41:52,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 289 transitions. [2022-07-20 22:41:52,498 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 289 transitions. Word has length 45 [2022-07-20 22:41:52,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:41:52,499 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 289 transitions. [2022-07-20 22:41:52,499 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) [2022-07-20 22:41:52,499 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 289 transitions. [2022-07-20 22:41:52,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-20 22:41:52,501 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:41:52,501 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] [2022-07-20 22:41:52,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-20 22:41:52,502 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:41:52,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:41:52,503 INFO L85 PathProgramCache]: Analyzing trace with hash -996579429, now seen corresponding path program 1 times [2022-07-20 22:41:52,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:41:52,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132542391] [2022-07-20 22:41:52,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:41:52,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:41:52,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:41:52,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:41:52,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:41:52,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132542391] [2022-07-20 22:41:52,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132542391] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:41:52,645 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:41:52,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:41:52,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590311906] [2022-07-20 22:41:52,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:41:52,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:41:52,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:41:52,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:41:52,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:41:52,648 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) [2022-07-20 22:41:54,664 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 [] [2022-07-20 22:41:54,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:41:54,945 INFO L93 Difference]: Finished difference Result 378 states and 605 transitions. [2022-07-20 22:41:54,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:41:54,946 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 [2022-07-20 22:41:54,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:41:54,947 INFO L225 Difference]: With dead ends: 378 [2022-07-20 22:41:54,947 INFO L226 Difference]: Without dead ends: 208 [2022-07-20 22:41:54,948 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 [2022-07-20 22:41:54,949 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 22 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-20 22:41:54,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 487 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 150 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-20 22:41:54,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-07-20 22:41:54,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 191. [2022-07-20 22:41:54,960 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) [2022-07-20 22:41:54,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 308 transitions. [2022-07-20 22:41:54,962 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 308 transitions. Word has length 46 [2022-07-20 22:41:54,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:41:54,962 INFO L495 AbstractCegarLoop]: Abstraction has 191 states and 308 transitions. [2022-07-20 22:41:54,962 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) [2022-07-20 22:41:54,962 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 308 transitions. [2022-07-20 22:41:54,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-20 22:41:54,964 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:41:54,964 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] [2022-07-20 22:41:54,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-20 22:41:54,965 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:41:54,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:41:54,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1576915235, now seen corresponding path program 1 times [2022-07-20 22:41:54,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:41:54,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937673404] [2022-07-20 22:41:54,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:41:54,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:41:55,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:41:55,170 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:41:55,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:41:55,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937673404] [2022-07-20 22:41:55,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937673404] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:41:55,171 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:41:55,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:41:55,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423754070] [2022-07-20 22:41:55,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:41:55,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:41:55,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:41:55,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:41:55,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:41:55,175 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) [2022-07-20 22:41:56,939 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:41:57,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:41:57,351 INFO L93 Difference]: Finished difference Result 519 states and 841 transitions. [2022-07-20 22:41:57,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:41:57,354 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 [2022-07-20 22:41:57,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:41:57,356 INFO L225 Difference]: With dead ends: 519 [2022-07-20 22:41:57,356 INFO L226 Difference]: Without dead ends: 349 [2022-07-20 22:41:57,357 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 [2022-07-20 22:41:57,358 INFO L413 NwaCegarLoop]: 267 mSDtfsCounter, 147 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s 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, 2.1s IncrementalHoareTripleChecker+Time [2022-07-20 22:41:57,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 640 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-07-20 22:41:57,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2022-07-20 22:41:57,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 223. [2022-07-20 22:41:57,381 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) [2022-07-20 22:41:57,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 359 transitions. [2022-07-20 22:41:57,382 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 359 transitions. Word has length 59 [2022-07-20 22:41:57,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:41:57,383 INFO L495 AbstractCegarLoop]: Abstraction has 223 states and 359 transitions. [2022-07-20 22:41:57,383 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) [2022-07-20 22:41:57,384 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 359 transitions. [2022-07-20 22:41:57,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-20 22:41:57,392 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:41:57,392 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] [2022-07-20 22:41:57,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-20 22:41:57,393 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:41:57,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:41:57,393 INFO L85 PathProgramCache]: Analyzing trace with hash -791759566, now seen corresponding path program 1 times [2022-07-20 22:41:57,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:41:57,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931431263] [2022-07-20 22:41:57,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:41:57,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:41:57,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:41:57,581 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:41:57,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:41:57,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931431263] [2022-07-20 22:41:57,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931431263] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:41:57,586 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:41:57,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:41:57,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421094935] [2022-07-20 22:41:57,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:41:57,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:41:57,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:41:57,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:41:57,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:41:57,589 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) [2022-07-20 22:41:59,597 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 [] [2022-07-20 22:41:59,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:41:59,874 INFO L93 Difference]: Finished difference Result 441 states and 706 transitions. [2022-07-20 22:41:59,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:41:59,875 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 [2022-07-20 22:41:59,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:41:59,877 INFO L225 Difference]: With dead ends: 441 [2022-07-20 22:41:59,877 INFO L226 Difference]: Without dead ends: 239 [2022-07-20 22:41:59,878 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 [2022-07-20 22:41:59,879 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 28 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 491 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-20 22:41:59,879 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 491 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 146 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-20 22:41:59,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-07-20 22:41:59,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 223. [2022-07-20 22:41:59,898 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) [2022-07-20 22:41:59,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 358 transitions. [2022-07-20 22:41:59,900 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 358 transitions. Word has length 60 [2022-07-20 22:41:59,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:41:59,901 INFO L495 AbstractCegarLoop]: Abstraction has 223 states and 358 transitions. [2022-07-20 22:41:59,902 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) [2022-07-20 22:41:59,902 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 358 transitions. [2022-07-20 22:41:59,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-20 22:41:59,904 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:41:59,904 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] [2022-07-20 22:41:59,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-20 22:41:59,905 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:41:59,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:41:59,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1867672350, now seen corresponding path program 1 times [2022-07-20 22:41:59,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:41:59,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291307571] [2022-07-20 22:41:59,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:41:59,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:41:59,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:00,009 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:42:00,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:00,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291307571] [2022-07-20 22:42:00,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291307571] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:00,010 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:42:00,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:42:00,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793193534] [2022-07-20 22:42:00,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:00,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:42:00,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:00,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:42:00,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:42:00,013 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) [2022-07-20 22:42:01,456 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:42:01,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:42:01,714 INFO L93 Difference]: Finished difference Result 441 states and 705 transitions. [2022-07-20 22:42:01,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:42:01,716 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 [2022-07-20 22:42:01,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:42:01,717 INFO L225 Difference]: With dead ends: 441 [2022-07-20 22:42:01,718 INFO L226 Difference]: Without dead ends: 239 [2022-07-20 22:42:01,718 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 [2022-07-20 22:42:01,719 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 26 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s 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, 1.7s IncrementalHoareTripleChecker+Time [2022-07-20 22:42:01,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 491 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-07-20 22:42:01,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-07-20 22:42:01,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 223. [2022-07-20 22:42:01,731 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) [2022-07-20 22:42:01,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 357 transitions. [2022-07-20 22:42:01,736 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 357 transitions. Word has length 60 [2022-07-20 22:42:01,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:42:01,736 INFO L495 AbstractCegarLoop]: Abstraction has 223 states and 357 transitions. [2022-07-20 22:42:01,737 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) [2022-07-20 22:42:01,737 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 357 transitions. [2022-07-20 22:42:01,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-20 22:42:01,738 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:01,738 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] [2022-07-20 22:42:01,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-20 22:42:01,738 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:01,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:01,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1221856039, now seen corresponding path program 1 times [2022-07-20 22:42:01,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:01,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113487342] [2022-07-20 22:42:01,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:01,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:01,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:01,890 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:42:01,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:01,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113487342] [2022-07-20 22:42:01,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113487342] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:01,891 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:42:01,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:42:01,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311884102] [2022-07-20 22:42:01,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:01,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:42:01,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:01,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:42:01,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:42:01,894 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) [2022-07-20 22:42:03,903 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 [] [2022-07-20 22:42:04,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:42:04,156 INFO L93 Difference]: Finished difference Result 440 states and 703 transitions. [2022-07-20 22:42:04,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:42:04,156 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 [2022-07-20 22:42:04,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:42:04,158 INFO L225 Difference]: With dead ends: 440 [2022-07-20 22:42:04,158 INFO L226 Difference]: Without dead ends: 238 [2022-07-20 22:42:04,158 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 [2022-07-20 22:42:04,159 INFO L413 NwaCegarLoop]: 193 mSDtfsCounter, 19 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-20 22:42:04,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 493 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 144 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-20 22:42:04,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2022-07-20 22:42:04,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 223. [2022-07-20 22:42:04,165 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) [2022-07-20 22:42:04,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 356 transitions. [2022-07-20 22:42:04,166 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 356 transitions. Word has length 60 [2022-07-20 22:42:04,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:42:04,166 INFO L495 AbstractCegarLoop]: Abstraction has 223 states and 356 transitions. [2022-07-20 22:42:04,166 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) [2022-07-20 22:42:04,166 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 356 transitions. [2022-07-20 22:42:04,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-20 22:42:04,168 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:04,168 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] [2022-07-20 22:42:04,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-20 22:42:04,168 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:04,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:04,169 INFO L85 PathProgramCache]: Analyzing trace with hash -748430745, now seen corresponding path program 1 times [2022-07-20 22:42:04,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:04,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520520410] [2022-07-20 22:42:04,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:04,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:04,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:04,292 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:42:04,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:04,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520520410] [2022-07-20 22:42:04,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520520410] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:04,293 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:42:04,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:42:04,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651700503] [2022-07-20 22:42:04,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:04,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:42:04,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:04,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:42:04,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:42:04,296 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) [2022-07-20 22:42:05,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:42:05,635 INFO L93 Difference]: Finished difference Result 528 states and 842 transitions. [2022-07-20 22:42:05,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:42:05,635 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 [2022-07-20 22:42:05,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:42:05,637 INFO L225 Difference]: With dead ends: 528 [2022-07-20 22:42:05,637 INFO L226 Difference]: Without dead ends: 326 [2022-07-20 22:42:05,637 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 [2022-07-20 22:42:05,638 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 146 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s 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, 1.3s IncrementalHoareTripleChecker+Time [2022-07-20 22:42:05,638 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 350 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-20 22:42:05,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-07-20 22:42:05,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 224. [2022-07-20 22:42:05,644 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) [2022-07-20 22:42:05,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 355 transitions. [2022-07-20 22:42:05,645 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 355 transitions. Word has length 60 [2022-07-20 22:42:05,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:42:05,645 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 355 transitions. [2022-07-20 22:42:05,645 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) [2022-07-20 22:42:05,645 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 355 transitions. [2022-07-20 22:42:05,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-07-20 22:42:05,646 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:05,646 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] [2022-07-20 22:42:05,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-20 22:42:05,646 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:05,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:05,646 INFO L85 PathProgramCache]: Analyzing trace with hash -399299686, now seen corresponding path program 1 times [2022-07-20 22:42:05,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:05,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99806813] [2022-07-20 22:42:05,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:05,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:05,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:05,745 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:42:05,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:05,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99806813] [2022-07-20 22:42:05,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99806813] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:05,746 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:42:05,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:42:05,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202293175] [2022-07-20 22:42:05,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:05,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:42:05,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:05,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:42:05,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:42:05,747 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) [2022-07-20 22:42:06,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:42:06,185 INFO L93 Difference]: Finished difference Result 440 states and 699 transitions. [2022-07-20 22:42:06,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:42:06,186 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 [2022-07-20 22:42:06,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:42:06,187 INFO L225 Difference]: With dead ends: 440 [2022-07-20 22:42:06,187 INFO L226 Difference]: Without dead ends: 237 [2022-07-20 22:42:06,188 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 [2022-07-20 22:42:06,188 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 22 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 22:42:06,189 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 497 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-20 22:42:06,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-07-20 22:42:06,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 224. [2022-07-20 22:42:06,194 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) [2022-07-20 22:42:06,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 354 transitions. [2022-07-20 22:42:06,195 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 354 transitions. Word has length 61 [2022-07-20 22:42:06,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:42:06,195 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 354 transitions. [2022-07-20 22:42:06,195 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) [2022-07-20 22:42:06,195 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 354 transitions. [2022-07-20 22:42:06,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-20 22:42:06,196 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:06,196 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] [2022-07-20 22:42:06,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-20 22:42:06,196 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:06,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:06,197 INFO L85 PathProgramCache]: Analyzing trace with hash -1403018247, now seen corresponding path program 1 times [2022-07-20 22:42:06,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:06,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636148840] [2022-07-20 22:42:06,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:06,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:06,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:06,308 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:42:06,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:06,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636148840] [2022-07-20 22:42:06,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636148840] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:06,309 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:42:06,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:42:06,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666770127] [2022-07-20 22:42:06,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:06,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:42:06,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:06,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:42:06,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:42:06,311 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) [2022-07-20 22:42:08,321 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 [] [2022-07-20 22:42:08,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:42:08,531 INFO L93 Difference]: Finished difference Result 440 states and 698 transitions. [2022-07-20 22:42:08,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:42:08,532 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 [2022-07-20 22:42:08,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:42:08,533 INFO L225 Difference]: With dead ends: 440 [2022-07-20 22:42:08,534 INFO L226 Difference]: Without dead ends: 237 [2022-07-20 22:42:08,534 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 [2022-07-20 22:42:08,535 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 [2022-07-20 22:42:08,535 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] [2022-07-20 22:42:08,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-07-20 22:42:08,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 224. [2022-07-20 22:42:08,540 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) [2022-07-20 22:42:08,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 353 transitions. [2022-07-20 22:42:08,541 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 353 transitions. Word has length 62 [2022-07-20 22:42:08,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:42:08,541 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 353 transitions. [2022-07-20 22:42:08,541 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) [2022-07-20 22:42:08,541 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 353 transitions. [2022-07-20 22:42:08,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-20 22:42:08,542 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:08,542 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] [2022-07-20 22:42:08,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-20 22:42:08,542 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:08,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:08,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1900584747, now seen corresponding path program 1 times [2022-07-20 22:42:08,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:08,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253313038] [2022-07-20 22:42:08,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:08,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:08,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:08,647 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:42:08,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:08,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253313038] [2022-07-20 22:42:08,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253313038] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:08,648 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:42:08,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:42:08,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529858657] [2022-07-20 22:42:08,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:08,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:42:08,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:08,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:42:08,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:42:08,650 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) [2022-07-20 22:42:10,658 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 [] [2022-07-20 22:42:10,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:42:10,845 INFO L93 Difference]: Finished difference Result 430 states and 684 transitions. [2022-07-20 22:42:10,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:42:10,846 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 [2022-07-20 22:42:10,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:42:10,847 INFO L225 Difference]: With dead ends: 430 [2022-07-20 22:42:10,847 INFO L226 Difference]: Without dead ends: 227 [2022-07-20 22:42:10,848 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 [2022-07-20 22:42:10,848 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 11 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-20 22:42:10,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 511 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 126 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-20 22:42:10,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-07-20 22:42:10,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 224. [2022-07-20 22:42:10,854 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) [2022-07-20 22:42:10,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 352 transitions. [2022-07-20 22:42:10,855 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 352 transitions. Word has length 63 [2022-07-20 22:42:10,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:42:10,855 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 352 transitions. [2022-07-20 22:42:10,856 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) [2022-07-20 22:42:10,856 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 352 transitions. [2022-07-20 22:42:10,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-20 22:42:10,856 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:10,857 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] [2022-07-20 22:42:10,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-20 22:42:10,857 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:10,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:10,858 INFO L85 PathProgramCache]: Analyzing trace with hash 606175341, now seen corresponding path program 1 times [2022-07-20 22:42:10,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:10,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405878716] [2022-07-20 22:42:10,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:10,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:10,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:10,956 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:42:10,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:10,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405878716] [2022-07-20 22:42:10,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405878716] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:10,957 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:42:10,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:42:10,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697614741] [2022-07-20 22:42:10,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:10,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:42:10,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:10,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:42:10,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:42:10,958 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) [2022-07-20 22:42:12,730 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:42:13,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:42:13,101 INFO L93 Difference]: Finished difference Result 529 states and 836 transitions. [2022-07-20 22:42:13,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:42:13,102 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 [2022-07-20 22:42:13,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:42:13,103 INFO L225 Difference]: With dead ends: 529 [2022-07-20 22:42:13,103 INFO L226 Difference]: Without dead ends: 326 [2022-07-20 22:42:13,104 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 [2022-07-20 22:42:13,104 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 123 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s 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, 2.1s IncrementalHoareTripleChecker+Time [2022-07-20 22:42:13,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 372 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-07-20 22:42:13,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-07-20 22:42:13,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 247. [2022-07-20 22:42:13,110 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) [2022-07-20 22:42:13,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 397 transitions. [2022-07-20 22:42:13,111 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 397 transitions. Word has length 63 [2022-07-20 22:42:13,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:42:13,112 INFO L495 AbstractCegarLoop]: Abstraction has 247 states and 397 transitions. [2022-07-20 22:42:13,112 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) [2022-07-20 22:42:13,112 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 397 transitions. [2022-07-20 22:42:13,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-20 22:42:13,113 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:13,113 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] [2022-07-20 22:42:13,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-20 22:42:13,113 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:13,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:13,114 INFO L85 PathProgramCache]: Analyzing trace with hash 604314113, now seen corresponding path program 1 times [2022-07-20 22:42:13,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:13,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242168389] [2022-07-20 22:42:13,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:13,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:13,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:13,254 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:42:13,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:13,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242168389] [2022-07-20 22:42:13,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242168389] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:13,254 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:42:13,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:42:13,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646458523] [2022-07-20 22:42:13,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:13,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:42:13,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:13,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:42:13,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:42:13,256 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) [2022-07-20 22:42:14,956 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 [] [2022-07-20 22:42:15,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:42:15,331 INFO L93 Difference]: Finished difference Result 628 states and 1018 transitions. [2022-07-20 22:42:15,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:42:15,332 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 [2022-07-20 22:42:15,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:42:15,334 INFO L225 Difference]: With dead ends: 628 [2022-07-20 22:42:15,334 INFO L226 Difference]: Without dead ends: 402 [2022-07-20 22:42:15,335 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 [2022-07-20 22:42:15,335 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 129 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s 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, 2.0s IncrementalHoareTripleChecker+Time [2022-07-20 22:42:15,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 360 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-07-20 22:42:15,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2022-07-20 22:42:15,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 311. [2022-07-20 22:42:15,343 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) [2022-07-20 22:42:15,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 509 transitions. [2022-07-20 22:42:15,344 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 509 transitions. Word has length 91 [2022-07-20 22:42:15,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:42:15,344 INFO L495 AbstractCegarLoop]: Abstraction has 311 states and 509 transitions. [2022-07-20 22:42:15,345 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) [2022-07-20 22:42:15,345 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 509 transitions. [2022-07-20 22:42:15,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-07-20 22:42:15,346 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:15,346 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] [2022-07-20 22:42:15,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-20 22:42:15,346 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:15,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:15,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1582109900, now seen corresponding path program 1 times [2022-07-20 22:42:15,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:15,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157364948] [2022-07-20 22:42:15,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:15,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:15,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:15,449 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:42:15,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:15,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157364948] [2022-07-20 22:42:15,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157364948] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:15,450 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:42:15,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:42:15,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984313652] [2022-07-20 22:42:15,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:15,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:42:15,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:15,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:42:15,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:42:15,451 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) [2022-07-20 22:42:17,468 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 [] [2022-07-20 22:42:17,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:42:17,833 INFO L93 Difference]: Finished difference Result 720 states and 1174 transitions. [2022-07-20 22:42:17,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:42:17,834 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 [2022-07-20 22:42:17,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:42:17,836 INFO L225 Difference]: With dead ends: 720 [2022-07-20 22:42:17,836 INFO L226 Difference]: Without dead ends: 430 [2022-07-20 22:42:17,837 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 [2022-07-20 22:42:17,837 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 125 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 60 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s 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, 2.4s IncrementalHoareTripleChecker+Time [2022-07-20 22:42:17,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 348 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 262 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2022-07-20 22:42:17,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2022-07-20 22:42:17,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 348. [2022-07-20 22:42:17,847 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) [2022-07-20 22:42:17,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 573 transitions. [2022-07-20 22:42:17,849 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 573 transitions. Word has length 96 [2022-07-20 22:42:17,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:42:17,849 INFO L495 AbstractCegarLoop]: Abstraction has 348 states and 573 transitions. [2022-07-20 22:42:17,849 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) [2022-07-20 22:42:17,849 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 573 transitions. [2022-07-20 22:42:17,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-07-20 22:42:17,851 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:17,851 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] [2022-07-20 22:42:17,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-20 22:42:17,851 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:17,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:17,852 INFO L85 PathProgramCache]: Analyzing trace with hash 940385999, now seen corresponding path program 1 times [2022-07-20 22:42:17,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:17,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722083796] [2022-07-20 22:42:17,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:17,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:17,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:17,976 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-20 22:42:17,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:17,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722083796] [2022-07-20 22:42:17,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722083796] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:17,977 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:42:17,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:42:17,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534477523] [2022-07-20 22:42:17,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:17,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:42:17,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:17,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:42:17,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:42:17,979 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) [2022-07-20 22:42:19,568 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 [] [2022-07-20 22:42:19,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:42:19,788 INFO L93 Difference]: Finished difference Result 716 states and 1183 transitions. [2022-07-20 22:42:19,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:42:19,789 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 [2022-07-20 22:42:19,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:42:19,791 INFO L225 Difference]: With dead ends: 716 [2022-07-20 22:42:19,791 INFO L226 Difference]: Without dead ends: 389 [2022-07-20 22:42:19,791 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 [2022-07-20 22:42:19,792 INFO L413 NwaCegarLoop]: 200 mSDtfsCounter, 32 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s 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, 1.8s IncrementalHoareTripleChecker+Time [2022-07-20 22:42:19,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 513 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-07-20 22:42:19,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2022-07-20 22:42:19,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 370. [2022-07-20 22:42:19,799 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) [2022-07-20 22:42:19,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 609 transitions. [2022-07-20 22:42:19,800 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 609 transitions. Word has length 97 [2022-07-20 22:42:19,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:42:19,801 INFO L495 AbstractCegarLoop]: Abstraction has 370 states and 609 transitions. [2022-07-20 22:42:19,801 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) [2022-07-20 22:42:19,801 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 609 transitions. [2022-07-20 22:42:19,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-07-20 22:42:19,802 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:19,802 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] [2022-07-20 22:42:19,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-20 22:42:19,803 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:19,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:19,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1511085862, now seen corresponding path program 1 times [2022-07-20 22:42:19,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:19,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758136283] [2022-07-20 22:42:19,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:19,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:19,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:19,913 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-20 22:42:19,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:19,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758136283] [2022-07-20 22:42:19,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758136283] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:19,914 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:42:19,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:42:19,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511976117] [2022-07-20 22:42:19,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:19,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:42:19,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:19,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:42:19,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:42:19,916 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) [2022-07-20 22:42:20,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:42:20,543 INFO L93 Difference]: Finished difference Result 737 states and 1217 transitions. [2022-07-20 22:42:20,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:42:20,544 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 [2022-07-20 22:42:20,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:42:20,546 INFO L225 Difference]: With dead ends: 737 [2022-07-20 22:42:20,546 INFO L226 Difference]: Without dead ends: 388 [2022-07-20 22:42:20,546 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 [2022-07-20 22:42:20,547 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 42 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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, 0.6s IncrementalHoareTripleChecker+Time [2022-07-20 22:42:20,547 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 515 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-20 22:42:20,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2022-07-20 22:42:20,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 370. [2022-07-20 22:42:20,555 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) [2022-07-20 22:42:20,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 608 transitions. [2022-07-20 22:42:20,556 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 608 transitions. Word has length 111 [2022-07-20 22:42:20,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:42:20,557 INFO L495 AbstractCegarLoop]: Abstraction has 370 states and 608 transitions. [2022-07-20 22:42:20,557 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) [2022-07-20 22:42:20,557 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 608 transitions. [2022-07-20 22:42:20,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-07-20 22:42:20,558 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:20,559 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] [2022-07-20 22:42:20,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-20 22:42:20,559 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:20,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:20,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1489464814, now seen corresponding path program 1 times [2022-07-20 22:42:20,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:20,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466374660] [2022-07-20 22:42:20,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:20,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:20,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:20,674 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-20 22:42:20,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:20,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466374660] [2022-07-20 22:42:20,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466374660] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:20,675 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:42:20,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:42:20,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717655340] [2022-07-20 22:42:20,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:20,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:42:20,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:20,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:42:20,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:42:20,677 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) [2022-07-20 22:42:22,152 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:42:22,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:42:22,476 INFO L93 Difference]: Finished difference Result 798 states and 1302 transitions. [2022-07-20 22:42:22,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:42:22,476 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 [2022-07-20 22:42:22,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:42:22,478 INFO L225 Difference]: With dead ends: 798 [2022-07-20 22:42:22,478 INFO L226 Difference]: Without dead ends: 449 [2022-07-20 22:42:22,479 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 [2022-07-20 22:42:22,479 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 150 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s 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, 1.8s IncrementalHoareTripleChecker+Time [2022-07-20 22:42:22,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 348 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-07-20 22:42:22,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2022-07-20 22:42:22,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 370. [2022-07-20 22:42:22,487 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) [2022-07-20 22:42:22,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 601 transitions. [2022-07-20 22:42:22,489 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 601 transitions. Word has length 111 [2022-07-20 22:42:22,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:42:22,489 INFO L495 AbstractCegarLoop]: Abstraction has 370 states and 601 transitions. [2022-07-20 22:42:22,489 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) [2022-07-20 22:42:22,489 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 601 transitions. [2022-07-20 22:42:22,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-07-20 22:42:22,490 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:22,491 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] [2022-07-20 22:42:22,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-20 22:42:22,491 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:22,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:22,492 INFO L85 PathProgramCache]: Analyzing trace with hash -168759333, now seen corresponding path program 1 times [2022-07-20 22:42:22,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:22,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993631509] [2022-07-20 22:42:22,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:22,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:22,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:22,589 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-20 22:42:22,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:22,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993631509] [2022-07-20 22:42:22,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993631509] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:22,590 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:42:22,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:42:22,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792666879] [2022-07-20 22:42:22,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:22,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:42:22,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:22,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:42:22,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:42:22,592 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) [2022-07-20 22:42:23,627 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 [] [2022-07-20 22:42:23,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:42:23,870 INFO L93 Difference]: Finished difference Result 736 states and 1200 transitions. [2022-07-20 22:42:23,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:42:23,870 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 [2022-07-20 22:42:23,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:42:23,872 INFO L225 Difference]: With dead ends: 736 [2022-07-20 22:42:23,872 INFO L226 Difference]: Without dead ends: 387 [2022-07-20 22:42:23,873 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 [2022-07-20 22:42:23,873 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 33 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s 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, 1.3s IncrementalHoareTripleChecker+Time [2022-07-20 22:42:23,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 517 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-20 22:42:23,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2022-07-20 22:42:23,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 370. [2022-07-20 22:42:23,881 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) [2022-07-20 22:42:23,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 600 transitions. [2022-07-20 22:42:23,882 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 600 transitions. Word has length 111 [2022-07-20 22:42:23,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:42:23,882 INFO L495 AbstractCegarLoop]: Abstraction has 370 states and 600 transitions. [2022-07-20 22:42:23,882 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) [2022-07-20 22:42:23,882 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 600 transitions. [2022-07-20 22:42:23,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-07-20 22:42:23,883 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:23,884 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] [2022-07-20 22:42:23,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-20 22:42:23,884 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:23,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:23,885 INFO L85 PathProgramCache]: Analyzing trace with hash 2051208234, now seen corresponding path program 1 times [2022-07-20 22:42:23,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:23,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410904429] [2022-07-20 22:42:23,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:23,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:23,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:23,984 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-20 22:42:23,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:23,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410904429] [2022-07-20 22:42:23,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410904429] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:23,985 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:42:23,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:42:23,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123851697] [2022-07-20 22:42:23,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:23,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:42:23,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:23,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:42:23,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:42:23,986 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) [2022-07-20 22:42:25,818 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.83s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:42:26,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:42:26,056 INFO L93 Difference]: Finished difference Result 736 states and 1198 transitions. [2022-07-20 22:42:26,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:42:26,057 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 [2022-07-20 22:42:26,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:42:26,058 INFO L225 Difference]: With dead ends: 736 [2022-07-20 22:42:26,059 INFO L226 Difference]: Without dead ends: 387 [2022-07-20 22:42:26,059 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 [2022-07-20 22:42:26,060 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 37 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s 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, 2.1s IncrementalHoareTripleChecker+Time [2022-07-20 22:42:26,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 517 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-07-20 22:42:26,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2022-07-20 22:42:26,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 370. [2022-07-20 22:42:26,067 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) [2022-07-20 22:42:26,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 599 transitions. [2022-07-20 22:42:26,068 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 599 transitions. Word has length 112 [2022-07-20 22:42:26,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:42:26,068 INFO L495 AbstractCegarLoop]: Abstraction has 370 states and 599 transitions. [2022-07-20 22:42:26,068 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) [2022-07-20 22:42:26,068 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 599 transitions. [2022-07-20 22:42:26,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-07-20 22:42:26,069 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:26,070 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] [2022-07-20 22:42:26,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-20 22:42:26,070 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:26,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:26,070 INFO L85 PathProgramCache]: Analyzing trace with hash -235149395, now seen corresponding path program 1 times [2022-07-20 22:42:26,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:26,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790536365] [2022-07-20 22:42:26,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:26,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:26,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:26,167 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-20 22:42:26,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:26,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790536365] [2022-07-20 22:42:26,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790536365] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:26,168 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:42:26,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:42:26,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981303365] [2022-07-20 22:42:26,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:26,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:42:26,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:26,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:42:26,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:42:26,170 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) [2022-07-20 22:42:28,183 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 [] [2022-07-20 22:42:28,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:42:28,391 INFO L93 Difference]: Finished difference Result 736 states and 1196 transitions. [2022-07-20 22:42:28,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:42:28,391 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 [2022-07-20 22:42:28,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:42:28,396 INFO L225 Difference]: With dead ends: 736 [2022-07-20 22:42:28,396 INFO L226 Difference]: Without dead ends: 387 [2022-07-20 22:42:28,398 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 [2022-07-20 22:42:28,399 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 35 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-20 22:42:28,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 517 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 158 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-20 22:42:28,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2022-07-20 22:42:28,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 370. [2022-07-20 22:42:28,407 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) [2022-07-20 22:42:28,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 598 transitions. [2022-07-20 22:42:28,408 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 598 transitions. Word has length 113 [2022-07-20 22:42:28,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:42:28,409 INFO L495 AbstractCegarLoop]: Abstraction has 370 states and 598 transitions. [2022-07-20 22:42:28,409 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) [2022-07-20 22:42:28,409 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 598 transitions. [2022-07-20 22:42:28,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-07-20 22:42:28,410 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:28,411 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] [2022-07-20 22:42:28,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-20 22:42:28,411 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:28,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:28,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1524135717, now seen corresponding path program 1 times [2022-07-20 22:42:28,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:28,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541026753] [2022-07-20 22:42:28,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:28,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:28,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:28,559 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-20 22:42:28,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:28,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541026753] [2022-07-20 22:42:28,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541026753] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:28,561 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:42:28,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:42:28,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155216411] [2022-07-20 22:42:28,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:28,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:42:28,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:28,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:42:28,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:42:28,562 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) [2022-07-20 22:42:30,485 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.92s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:42:30,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:42:30,698 INFO L93 Difference]: Finished difference Result 726 states and 1181 transitions. [2022-07-20 22:42:30,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:42:30,699 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 [2022-07-20 22:42:30,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:42:30,700 INFO L225 Difference]: With dead ends: 726 [2022-07-20 22:42:30,700 INFO L226 Difference]: Without dead ends: 377 [2022-07-20 22:42:30,701 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 [2022-07-20 22:42:30,701 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 26 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s 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, 2.1s IncrementalHoareTripleChecker+Time [2022-07-20 22:42:30,701 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 531 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-07-20 22:42:30,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2022-07-20 22:42:30,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 370. [2022-07-20 22:42:30,708 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) [2022-07-20 22:42:30,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 597 transitions. [2022-07-20 22:42:30,709 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 597 transitions. Word has length 114 [2022-07-20 22:42:30,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:42:30,709 INFO L495 AbstractCegarLoop]: Abstraction has 370 states and 597 transitions. [2022-07-20 22:42:30,710 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) [2022-07-20 22:42:30,710 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 597 transitions. [2022-07-20 22:42:30,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-07-20 22:42:30,711 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:30,711 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] [2022-07-20 22:42:30,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-20 22:42:30,712 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:30,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:30,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1622495564, now seen corresponding path program 1 times [2022-07-20 22:42:30,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:30,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140680778] [2022-07-20 22:42:30,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:30,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:30,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:30,828 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-20 22:42:30,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:30,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140680778] [2022-07-20 22:42:30,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140680778] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:30,829 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:42:30,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:42:30,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956419514] [2022-07-20 22:42:30,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:30,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:42:30,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:30,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:42:30,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:42:30,831 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) [2022-07-20 22:42:32,843 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 [] [2022-07-20 22:42:33,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:42:33,099 INFO L93 Difference]: Finished difference Result 813 states and 1312 transitions. [2022-07-20 22:42:33,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:42:33,100 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 [2022-07-20 22:42:33,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:42:33,101 INFO L225 Difference]: With dead ends: 813 [2022-07-20 22:42:33,101 INFO L226 Difference]: Without dead ends: 464 [2022-07-20 22:42:33,101 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 [2022-07-20 22:42:33,102 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, 2.3s IncrementalHoareTripleChecker+Time [2022-07-20 22:42:33,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 479 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 250 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-20 22:42:33,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2022-07-20 22:42:33,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 410. [2022-07-20 22:42:33,110 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) [2022-07-20 22:42:33,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 664 transitions. [2022-07-20 22:42:33,111 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 664 transitions. Word has length 119 [2022-07-20 22:42:33,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:42:33,111 INFO L495 AbstractCegarLoop]: Abstraction has 410 states and 664 transitions. [2022-07-20 22:42:33,111 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) [2022-07-20 22:42:33,111 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 664 transitions. [2022-07-20 22:42:33,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-07-20 22:42:33,120 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:33,120 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] [2022-07-20 22:42:33,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-20 22:42:33,121 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:33,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:33,122 INFO L85 PathProgramCache]: Analyzing trace with hash -454841334, now seen corresponding path program 1 times [2022-07-20 22:42:33,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:33,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503934088] [2022-07-20 22:42:33,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:33,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:33,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:33,226 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-20 22:42:33,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:33,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503934088] [2022-07-20 22:42:33,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503934088] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:33,226 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:42:33,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:42:33,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216663138] [2022-07-20 22:42:33,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:33,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:42:33,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:33,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:42:33,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:42:33,228 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) [2022-07-20 22:42:35,243 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 [] [2022-07-20 22:42:35,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:42:35,451 INFO L93 Difference]: Finished difference Result 846 states and 1373 transitions. [2022-07-20 22:42:35,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:42:35,452 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 [2022-07-20 22:42:35,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:42:35,453 INFO L225 Difference]: With dead ends: 846 [2022-07-20 22:42:35,454 INFO L226 Difference]: Without dead ends: 457 [2022-07-20 22:42:35,454 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 [2022-07-20 22:42:35,455 INFO L413 NwaCegarLoop]: 250 mSDtfsCounter, 37 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s 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 [2022-07-20 22:42:35,455 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] [2022-07-20 22:42:35,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2022-07-20 22:42:35,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 434. [2022-07-20 22:42:35,462 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) [2022-07-20 22:42:35,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 703 transitions. [2022-07-20 22:42:35,463 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 703 transitions. Word has length 119 [2022-07-20 22:42:35,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:42:35,464 INFO L495 AbstractCegarLoop]: Abstraction has 434 states and 703 transitions. [2022-07-20 22:42:35,464 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) [2022-07-20 22:42:35,464 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 703 transitions. [2022-07-20 22:42:35,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-07-20 22:42:35,465 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:35,465 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] [2022-07-20 22:42:35,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-20 22:42:35,466 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:35,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:35,466 INFO L85 PathProgramCache]: Analyzing trace with hash 734680572, now seen corresponding path program 1 times [2022-07-20 22:42:35,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:35,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135049393] [2022-07-20 22:42:35,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:35,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:35,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:35,567 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-20 22:42:35,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:35,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135049393] [2022-07-20 22:42:35,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135049393] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:35,568 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:42:35,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:42:35,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598327407] [2022-07-20 22:42:35,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:35,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:42:35,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:35,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:42:35,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:42:35,569 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) [2022-07-20 22:42:36,864 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 [] [2022-07-20 22:42:37,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:42:37,136 INFO L93 Difference]: Finished difference Result 892 states and 1441 transitions. [2022-07-20 22:42:37,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:42:37,137 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 [2022-07-20 22:42:37,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:42:37,139 INFO L225 Difference]: With dead ends: 892 [2022-07-20 22:42:37,139 INFO L226 Difference]: Without dead ends: 479 [2022-07-20 22:42:37,140 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 [2022-07-20 22:42:37,140 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 64 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-20 22:42:37,140 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 485 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-20 22:42:37,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2022-07-20 22:42:37,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 437. [2022-07-20 22:42:37,148 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) [2022-07-20 22:42:37,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 706 transitions. [2022-07-20 22:42:37,149 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 706 transitions. Word has length 127 [2022-07-20 22:42:37,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:42:37,149 INFO L495 AbstractCegarLoop]: Abstraction has 437 states and 706 transitions. [2022-07-20 22:42:37,149 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) [2022-07-20 22:42:37,149 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 706 transitions. [2022-07-20 22:42:37,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-07-20 22:42:37,151 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:37,151 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] [2022-07-20 22:42:37,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-07-20 22:42:37,152 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:37,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:37,152 INFO L85 PathProgramCache]: Analyzing trace with hash 474669795, now seen corresponding path program 1 times [2022-07-20 22:42:37,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:37,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607834196] [2022-07-20 22:42:37,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:37,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:37,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:37,321 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-20 22:42:37,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:37,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607834196] [2022-07-20 22:42:37,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607834196] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:37,322 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:42:37,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:42:37,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361948636] [2022-07-20 22:42:37,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:37,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:42:37,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:37,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:42:37,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:42:37,324 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) [2022-07-20 22:42:37,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:42:37,808 INFO L93 Difference]: Finished difference Result 931 states and 1497 transitions. [2022-07-20 22:42:37,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:42:37,809 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 [2022-07-20 22:42:37,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:42:37,810 INFO L225 Difference]: With dead ends: 931 [2022-07-20 22:42:37,810 INFO L226 Difference]: Without dead ends: 515 [2022-07-20 22:42:37,811 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 [2022-07-20 22:42:37,812 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 150 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 22:42:37,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 350 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-20 22:42:37,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2022-07-20 22:42:37,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 437. [2022-07-20 22:42:37,819 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) [2022-07-20 22:42:37,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 698 transitions. [2022-07-20 22:42:37,821 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 698 transitions. Word has length 133 [2022-07-20 22:42:37,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:42:37,821 INFO L495 AbstractCegarLoop]: Abstraction has 437 states and 698 transitions. [2022-07-20 22:42:37,821 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) [2022-07-20 22:42:37,821 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 698 transitions. [2022-07-20 22:42:37,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-07-20 22:42:37,823 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:37,823 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] [2022-07-20 22:42:37,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-07-20 22:42:37,823 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:37,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:37,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1205175400, now seen corresponding path program 1 times [2022-07-20 22:42:37,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:37,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074947989] [2022-07-20 22:42:37,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:37,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:37,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:37,928 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-20 22:42:37,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:37,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074947989] [2022-07-20 22:42:37,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074947989] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:37,929 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:42:37,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:42:37,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379052266] [2022-07-20 22:42:37,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:37,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:42:37,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:37,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:42:37,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:42:37,931 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) [2022-07-20 22:42:39,350 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:42:39,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:42:39,729 INFO L93 Difference]: Finished difference Result 930 states and 1480 transitions. [2022-07-20 22:42:39,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:42:39,730 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 [2022-07-20 22:42:39,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:42:39,731 INFO L225 Difference]: With dead ends: 930 [2022-07-20 22:42:39,731 INFO L226 Difference]: Without dead ends: 514 [2022-07-20 22:42:39,732 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 [2022-07-20 22:42:39,733 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 142 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-20 22:42:39,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 352 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-07-20 22:42:39,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2022-07-20 22:42:39,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 437. [2022-07-20 22:42:39,751 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) [2022-07-20 22:42:39,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 691 transitions. [2022-07-20 22:42:39,752 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 691 transitions. Word has length 133 [2022-07-20 22:42:39,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:42:39,753 INFO L495 AbstractCegarLoop]: Abstraction has 437 states and 691 transitions. [2022-07-20 22:42:39,753 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) [2022-07-20 22:42:39,753 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 691 transitions. [2022-07-20 22:42:39,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-07-20 22:42:39,755 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:39,755 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] [2022-07-20 22:42:39,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-07-20 22:42:39,755 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:39,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:39,757 INFO L85 PathProgramCache]: Analyzing trace with hash -12918771, now seen corresponding path program 1 times [2022-07-20 22:42:39,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:39,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559832895] [2022-07-20 22:42:39,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:39,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:39,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:39,896 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-07-20 22:42:39,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:39,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559832895] [2022-07-20 22:42:39,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559832895] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:39,897 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:42:39,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 22:42:39,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238950562] [2022-07-20 22:42:39,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:39,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 22:42:39,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:39,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 22:42:39,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:42:39,900 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) [2022-07-20 22:42:41,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:42:41,480 INFO L93 Difference]: Finished difference Result 863 states and 1370 transitions. [2022-07-20 22:42:41,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-20 22:42:41,481 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 [2022-07-20 22:42:41,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:42:41,482 INFO L225 Difference]: With dead ends: 863 [2022-07-20 22:42:41,482 INFO L226 Difference]: Without dead ends: 447 [2022-07-20 22:42:41,483 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 [2022-07-20 22:42:41,483 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 151 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s 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, 1.6s IncrementalHoareTripleChecker+Time [2022-07-20 22:42:41,485 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 378 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-20 22:42:41,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2022-07-20 22:42:41,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 446. [2022-07-20 22:42:41,493 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) [2022-07-20 22:42:41,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 702 transitions. [2022-07-20 22:42:41,494 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 702 transitions. Word has length 134 [2022-07-20 22:42:41,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:42:41,494 INFO L495 AbstractCegarLoop]: Abstraction has 446 states and 702 transitions. [2022-07-20 22:42:41,494 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) [2022-07-20 22:42:41,494 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 702 transitions. [2022-07-20 22:42:41,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-07-20 22:42:41,496 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:41,496 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] [2022-07-20 22:42:41,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-07-20 22:42:41,496 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:41,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:41,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1630069500, now seen corresponding path program 1 times [2022-07-20 22:42:41,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:41,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532409956] [2022-07-20 22:42:41,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:41,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:41,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:41,614 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-20 22:42:41,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:41,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532409956] [2022-07-20 22:42:41,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532409956] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:41,615 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:42:41,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:42:41,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717056720] [2022-07-20 22:42:41,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:41,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:42:41,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:41,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:42:41,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:42:41,616 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) [2022-07-20 22:42:42,663 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:42:42,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:42:42,912 INFO L93 Difference]: Finished difference Result 911 states and 1432 transitions. [2022-07-20 22:42:42,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:42:42,912 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 [2022-07-20 22:42:42,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:42:42,913 INFO L225 Difference]: With dead ends: 911 [2022-07-20 22:42:42,913 INFO L226 Difference]: Without dead ends: 486 [2022-07-20 22:42:42,914 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 [2022-07-20 22:42:42,915 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 89 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s 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, 1.3s IncrementalHoareTripleChecker+Time [2022-07-20 22:42:42,915 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 515 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-20 22:42:42,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2022-07-20 22:42:42,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 446. [2022-07-20 22:42:42,924 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) [2022-07-20 22:42:42,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 701 transitions. [2022-07-20 22:42:42,925 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 701 transitions. Word has length 135 [2022-07-20 22:42:42,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:42:42,926 INFO L495 AbstractCegarLoop]: Abstraction has 446 states and 701 transitions. [2022-07-20 22:42:42,926 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) [2022-07-20 22:42:42,926 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 701 transitions. [2022-07-20 22:42:42,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-07-20 22:42:42,927 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:42,927 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] [2022-07-20 22:42:42,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-07-20 22:42:42,928 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:42,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:42,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1601569210, now seen corresponding path program 1 times [2022-07-20 22:42:42,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:42,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301127074] [2022-07-20 22:42:42,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:42,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:43,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:43,050 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-20 22:42:43,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:43,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301127074] [2022-07-20 22:42:43,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301127074] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:43,051 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:42:43,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:42:43,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563149372] [2022-07-20 22:42:43,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:43,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:42:43,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:43,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:42:43,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:42:43,052 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) [2022-07-20 22:42:44,271 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:42:44,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:42:44,469 INFO L93 Difference]: Finished difference Result 892 states and 1404 transitions. [2022-07-20 22:42:44,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:42:44,469 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 [2022-07-20 22:42:44,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:42:44,470 INFO L225 Difference]: With dead ends: 892 [2022-07-20 22:42:44,471 INFO L226 Difference]: Without dead ends: 467 [2022-07-20 22:42:44,471 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 [2022-07-20 22:42:44,471 INFO L413 NwaCegarLoop]: 248 mSDtfsCounter, 45 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s 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, 1.4s IncrementalHoareTripleChecker+Time [2022-07-20 22:42:44,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 607 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-20 22:42:44,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2022-07-20 22:42:44,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 446. [2022-07-20 22:42:44,480 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) [2022-07-20 22:42:44,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 700 transitions. [2022-07-20 22:42:44,481 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 700 transitions. Word has length 135 [2022-07-20 22:42:44,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:42:44,481 INFO L495 AbstractCegarLoop]: Abstraction has 446 states and 700 transitions. [2022-07-20 22:42:44,481 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) [2022-07-20 22:42:44,481 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 700 transitions. [2022-07-20 22:42:44,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-07-20 22:42:44,483 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:44,483 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] [2022-07-20 22:42:44,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-07-20 22:42:44,483 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:44,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:44,484 INFO L85 PathProgramCache]: Analyzing trace with hash -315273601, now seen corresponding path program 1 times [2022-07-20 22:42:44,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:44,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209381297] [2022-07-20 22:42:44,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:44,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:44,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:44,629 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-20 22:42:44,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:44,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209381297] [2022-07-20 22:42:44,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209381297] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:44,630 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:42:44,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:42:44,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160998349] [2022-07-20 22:42:44,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:44,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:42:44,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:44,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:42:44,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:42:44,631 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) [2022-07-20 22:42:46,371 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 [] [2022-07-20 22:42:46,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:42:46,734 INFO L93 Difference]: Finished difference Result 948 states and 1483 transitions. [2022-07-20 22:42:46,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:42:46,734 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 [2022-07-20 22:42:46,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:42:46,736 INFO L225 Difference]: With dead ends: 948 [2022-07-20 22:42:46,736 INFO L226 Difference]: Without dead ends: 523 [2022-07-20 22:42:46,736 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 [2022-07-20 22:42:46,737 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 145 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s 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, 2.1s IncrementalHoareTripleChecker+Time [2022-07-20 22:42:46,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 360 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-07-20 22:42:46,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2022-07-20 22:42:46,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 446. [2022-07-20 22:42:46,757 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) [2022-07-20 22:42:46,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 692 transitions. [2022-07-20 22:42:46,759 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 692 transitions. Word has length 136 [2022-07-20 22:42:46,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:42:46,759 INFO L495 AbstractCegarLoop]: Abstraction has 446 states and 692 transitions. [2022-07-20 22:42:46,759 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) [2022-07-20 22:42:46,759 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 692 transitions. [2022-07-20 22:42:46,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-07-20 22:42:46,760 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:46,761 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] [2022-07-20 22:42:46,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-07-20 22:42:46,761 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:46,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:46,762 INFO L85 PathProgramCache]: Analyzing trace with hash 673289249, now seen corresponding path program 1 times [2022-07-20 22:42:46,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:46,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979279334] [2022-07-20 22:42:46,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:46,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:46,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:46,888 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-20 22:42:46,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:46,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979279334] [2022-07-20 22:42:46,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979279334] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:46,889 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:42:46,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:42:46,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341337075] [2022-07-20 22:42:46,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:46,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:42:46,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:46,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:42:46,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:42:46,891 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) [2022-07-20 22:42:48,479 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 [] [2022-07-20 22:42:48,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:42:48,795 INFO L93 Difference]: Finished difference Result 948 states and 1467 transitions. [2022-07-20 22:42:48,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:42:48,796 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 [2022-07-20 22:42:48,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:42:48,798 INFO L225 Difference]: With dead ends: 948 [2022-07-20 22:42:48,798 INFO L226 Difference]: Without dead ends: 523 [2022-07-20 22:42:48,799 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 [2022-07-20 22:42:48,800 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 143 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s 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, 1.9s IncrementalHoareTripleChecker+Time [2022-07-20 22:42:48,800 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 384 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-07-20 22:42:48,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2022-07-20 22:42:48,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 446. [2022-07-20 22:42:48,818 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) [2022-07-20 22:42:48,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 684 transitions. [2022-07-20 22:42:48,820 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 684 transitions. Word has length 137 [2022-07-20 22:42:48,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:42:48,820 INFO L495 AbstractCegarLoop]: Abstraction has 446 states and 684 transitions. [2022-07-20 22:42:48,820 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) [2022-07-20 22:42:48,820 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 684 transitions. [2022-07-20 22:42:48,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-07-20 22:42:48,821 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:48,821 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] [2022-07-20 22:42:48,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-07-20 22:42:48,822 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:48,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:48,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1690568053, now seen corresponding path program 1 times [2022-07-20 22:42:48,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:48,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697621628] [2022-07-20 22:42:48,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:48,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:48,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:49,029 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 134 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-07-20 22:42:49,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:49,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697621628] [2022-07-20 22:42:49,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697621628] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:49,029 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:42:49,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:42:49,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176146985] [2022-07-20 22:42:49,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:49,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:42:49,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:49,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:42:49,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:42:49,031 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) [2022-07-20 22:42:50,293 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:42:50,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:42:50,641 INFO L93 Difference]: Finished difference Result 988 states and 1515 transitions. [2022-07-20 22:42:50,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:42:50,641 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 [2022-07-20 22:42:50,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:42:50,643 INFO L225 Difference]: With dead ends: 988 [2022-07-20 22:42:50,644 INFO L226 Difference]: Without dead ends: 563 [2022-07-20 22:42:50,644 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 [2022-07-20 22:42:50,645 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 [2022-07-20 22:42:50,645 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] [2022-07-20 22:42:50,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2022-07-20 22:42:50,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 476. [2022-07-20 22:42:50,664 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) [2022-07-20 22:42:50,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 726 transitions. [2022-07-20 22:42:50,665 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 726 transitions. Word has length 140 [2022-07-20 22:42:50,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:42:50,665 INFO L495 AbstractCegarLoop]: Abstraction has 476 states and 726 transitions. [2022-07-20 22:42:50,666 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) [2022-07-20 22:42:50,666 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 726 transitions. [2022-07-20 22:42:50,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-07-20 22:42:50,667 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:50,667 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] [2022-07-20 22:42:50,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-07-20 22:42:50,668 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:50,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:50,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1678698517, now seen corresponding path program 1 times [2022-07-20 22:42:50,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:50,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127295483] [2022-07-20 22:42:50,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:50,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:50,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:50,794 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 122 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-20 22:42:50,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:50,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127295483] [2022-07-20 22:42:50,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127295483] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:50,794 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:42:50,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:42:50,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576802497] [2022-07-20 22:42:50,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:50,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:42:50,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:50,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:42:50,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:42:50,796 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) [2022-07-20 22:42:52,741 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.94s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:42:53,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:42:53,000 INFO L93 Difference]: Finished difference Result 961 states and 1468 transitions. [2022-07-20 22:42:53,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:42:53,000 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 [2022-07-20 22:42:53,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:42:53,002 INFO L225 Difference]: With dead ends: 961 [2022-07-20 22:42:53,002 INFO L226 Difference]: Without dead ends: 506 [2022-07-20 22:42:53,002 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 [2022-07-20 22:42:53,003 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 67 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 515 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-20 22:42:53,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 515 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-07-20 22:42:53,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2022-07-20 22:42:53,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 476. [2022-07-20 22:42:53,013 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) [2022-07-20 22:42:53,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 725 transitions. [2022-07-20 22:42:53,014 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 725 transitions. Word has length 141 [2022-07-20 22:42:53,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:42:53,014 INFO L495 AbstractCegarLoop]: Abstraction has 476 states and 725 transitions. [2022-07-20 22:42:53,014 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) [2022-07-20 22:42:53,014 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 725 transitions. [2022-07-20 22:42:53,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-07-20 22:42:53,016 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:53,016 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] [2022-07-20 22:42:53,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-07-20 22:42:53,016 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:53,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:53,017 INFO L85 PathProgramCache]: Analyzing trace with hash -324893651, now seen corresponding path program 1 times [2022-07-20 22:42:53,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:53,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495129730] [2022-07-20 22:42:53,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:53,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:53,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:53,153 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 136 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-07-20 22:42:53,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:53,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495129730] [2022-07-20 22:42:53,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495129730] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:53,154 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:42:53,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:42:53,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478800481] [2022-07-20 22:42:53,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:53,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:42:53,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:53,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:42:53,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:42:53,156 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) [2022-07-20 22:42:55,161 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 [] [2022-07-20 22:42:55,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:42:55,398 INFO L93 Difference]: Finished difference Result 959 states and 1464 transitions. [2022-07-20 22:42:55,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:42:55,398 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 [2022-07-20 22:42:55,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:42:55,400 INFO L225 Difference]: With dead ends: 959 [2022-07-20 22:42:55,400 INFO L226 Difference]: Without dead ends: 504 [2022-07-20 22:42:55,401 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 [2022-07-20 22:42:55,402 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 58 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-20 22:42:55,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 517 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 223 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-20 22:42:55,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2022-07-20 22:42:55,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 476. [2022-07-20 22:42:55,411 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) [2022-07-20 22:42:55,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 724 transitions. [2022-07-20 22:42:55,412 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 724 transitions. Word has length 141 [2022-07-20 22:42:55,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:42:55,413 INFO L495 AbstractCegarLoop]: Abstraction has 476 states and 724 transitions. [2022-07-20 22:42:55,413 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) [2022-07-20 22:42:55,413 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 724 transitions. [2022-07-20 22:42:55,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-07-20 22:42:55,414 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:55,415 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] [2022-07-20 22:42:55,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-07-20 22:42:55,415 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:55,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:55,416 INFO L85 PathProgramCache]: Analyzing trace with hash -227704749, now seen corresponding path program 1 times [2022-07-20 22:42:55,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:55,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138737859] [2022-07-20 22:42:55,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:55,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:55,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:55,543 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-07-20 22:42:55,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:55,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138737859] [2022-07-20 22:42:55,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138737859] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:55,544 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:42:55,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:42:55,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532024750] [2022-07-20 22:42:55,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:55,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:42:55,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:55,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:42:55,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:42:55,545 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) [2022-07-20 22:42:57,559 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 [] [2022-07-20 22:42:57,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:42:57,870 INFO L93 Difference]: Finished difference Result 1008 states and 1531 transitions. [2022-07-20 22:42:57,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:42:57,871 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 [2022-07-20 22:42:57,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:42:57,873 INFO L225 Difference]: With dead ends: 1008 [2022-07-20 22:42:57,873 INFO L226 Difference]: Without dead ends: 553 [2022-07-20 22:42:57,874 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 [2022-07-20 22:42:57,874 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 [2022-07-20 22:42:57,875 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] [2022-07-20 22:42:57,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2022-07-20 22:42:57,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 476. [2022-07-20 22:42:57,886 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) [2022-07-20 22:42:57,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 722 transitions. [2022-07-20 22:42:57,888 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 722 transitions. Word has length 141 [2022-07-20 22:42:57,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:42:57,888 INFO L495 AbstractCegarLoop]: Abstraction has 476 states and 722 transitions. [2022-07-20 22:42:57,888 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) [2022-07-20 22:42:57,888 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 722 transitions. [2022-07-20 22:42:57,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-07-20 22:42:57,890 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:57,890 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] [2022-07-20 22:42:57,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-07-20 22:42:57,890 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:57,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:57,891 INFO L85 PathProgramCache]: Analyzing trace with hash 1527043924, now seen corresponding path program 1 times [2022-07-20 22:42:57,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:57,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22512867] [2022-07-20 22:42:57,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:57,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:57,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:58,008 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 130 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-07-20 22:42:58,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:58,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22512867] [2022-07-20 22:42:58,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22512867] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:58,009 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:42:58,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:42:58,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755260523] [2022-07-20 22:42:58,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:58,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:42:58,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:58,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:42:58,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:42:58,011 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) [2022-07-20 22:43:00,026 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 [] [2022-07-20 22:43:00,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:43:00,357 INFO L93 Difference]: Finished difference Result 1048 states and 1589 transitions. [2022-07-20 22:43:00,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:43:00,358 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 [2022-07-20 22:43:00,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:43:00,360 INFO L225 Difference]: With dead ends: 1048 [2022-07-20 22:43:00,360 INFO L226 Difference]: Without dead ends: 593 [2022-07-20 22:43:00,360 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 [2022-07-20 22:43:00,361 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 128 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 53 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-20 22:43:00,361 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 384 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 256 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-20 22:43:00,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2022-07-20 22:43:00,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 504. [2022-07-20 22:43:00,372 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) [2022-07-20 22:43:00,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 759 transitions. [2022-07-20 22:43:00,373 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 759 transitions. Word has length 143 [2022-07-20 22:43:00,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:43:00,373 INFO L495 AbstractCegarLoop]: Abstraction has 504 states and 759 transitions. [2022-07-20 22:43:00,374 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) [2022-07-20 22:43:00,374 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 759 transitions. [2022-07-20 22:43:00,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-07-20 22:43:00,375 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:43:00,375 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] [2022-07-20 22:43:00,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-07-20 22:43:00,376 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:43:00,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:43:00,376 INFO L85 PathProgramCache]: Analyzing trace with hash 2144575250, now seen corresponding path program 1 times [2022-07-20 22:43:00,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:43:00,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807643973] [2022-07-20 22:43:00,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:43:00,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:43:00,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:43:00,510 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 132 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-07-20 22:43:00,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:43:00,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807643973] [2022-07-20 22:43:00,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807643973] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:43:00,511 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:43:00,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:43:00,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574417556] [2022-07-20 22:43:00,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:43:00,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:43:00,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:43:00,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:43:00,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:43:00,513 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) [2022-07-20 22:43:01,623 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 [] [2022-07-20 22:43:01,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:43:01,914 INFO L93 Difference]: Finished difference Result 1064 states and 1601 transitions. [2022-07-20 22:43:01,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:43:01,915 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 [2022-07-20 22:43:01,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:43:01,916 INFO L225 Difference]: With dead ends: 1064 [2022-07-20 22:43:01,916 INFO L226 Difference]: Without dead ends: 581 [2022-07-20 22:43:01,917 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 [2022-07-20 22:43:01,917 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 127 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s 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, 1.4s IncrementalHoareTripleChecker+Time [2022-07-20 22:43:01,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 360 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-20 22:43:01,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2022-07-20 22:43:01,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 504. [2022-07-20 22:43:01,925 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) [2022-07-20 22:43:01,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 752 transitions. [2022-07-20 22:43:01,926 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 752 transitions. Word has length 144 [2022-07-20 22:43:01,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:43:01,926 INFO L495 AbstractCegarLoop]: Abstraction has 504 states and 752 transitions. [2022-07-20 22:43:01,926 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) [2022-07-20 22:43:01,926 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 752 transitions. [2022-07-20 22:43:01,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-07-20 22:43:01,927 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:43:01,927 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] [2022-07-20 22:43:01,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-07-20 22:43:01,928 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:43:01,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:43:01,928 INFO L85 PathProgramCache]: Analyzing trace with hash 599952899, now seen corresponding path program 1 times [2022-07-20 22:43:01,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:43:01,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900269102] [2022-07-20 22:43:01,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:43:01,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:43:02,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:43:02,039 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 137 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-20 22:43:02,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:43:02,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900269102] [2022-07-20 22:43:02,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900269102] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:43:02,040 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:43:02,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 22:43:02,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871959780] [2022-07-20 22:43:02,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:43:02,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:43:02,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:43:02,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:43:02,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:43:02,044 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) [2022-07-20 22:43:02,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:43:02,104 INFO L93 Difference]: Finished difference Result 1461 states and 2193 transitions. [2022-07-20 22:43:02,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:43:02,104 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 [2022-07-20 22:43:02,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:43:02,108 INFO L225 Difference]: With dead ends: 1461 [2022-07-20 22:43:02,108 INFO L226 Difference]: Without dead ends: 978 [2022-07-20 22:43:02,109 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 [2022-07-20 22:43:02,112 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 [2022-07-20 22:43:02,113 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] [2022-07-20 22:43:02,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 978 states. [2022-07-20 22:43:02,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 978 to 976. [2022-07-20 22:43:02,134 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) [2022-07-20 22:43:02,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 976 states to 976 states and 1455 transitions. [2022-07-20 22:43:02,137 INFO L78 Accepts]: Start accepts. Automaton has 976 states and 1455 transitions. Word has length 149 [2022-07-20 22:43:02,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:43:02,138 INFO L495 AbstractCegarLoop]: Abstraction has 976 states and 1455 transitions. [2022-07-20 22:43:02,138 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) [2022-07-20 22:43:02,138 INFO L276 IsEmpty]: Start isEmpty. Operand 976 states and 1455 transitions. [2022-07-20 22:43:02,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-07-20 22:43:02,140 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:43:02,140 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] [2022-07-20 22:43:02,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-07-20 22:43:02,141 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:43:02,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:43:02,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1373212479, now seen corresponding path program 1 times [2022-07-20 22:43:02,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:43:02,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329850894] [2022-07-20 22:43:02,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:43:02,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:43:02,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:43:02,240 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-07-20 22:43:02,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:43:02,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329850894] [2022-07-20 22:43:02,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329850894] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:43:02,241 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:43:02,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 22:43:02,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413886500] [2022-07-20 22:43:02,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:43:02,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:43:02,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:43:02,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:43:02,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:43:02,244 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) [2022-07-20 22:43:02,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:43:02,290 INFO L93 Difference]: Finished difference Result 1958 states and 2922 transitions. [2022-07-20 22:43:02,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:43:02,290 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 [2022-07-20 22:43:02,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:43:02,293 INFO L225 Difference]: With dead ends: 1958 [2022-07-20 22:43:02,294 INFO L226 Difference]: Without dead ends: 1003 [2022-07-20 22:43:02,295 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 [2022-07-20 22:43:02,301 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 [2022-07-20 22:43:02,302 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] [2022-07-20 22:43:02,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1003 states. [2022-07-20 22:43:02,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1003 to 1003. [2022-07-20 22:43:02,322 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) [2022-07-20 22:43:02,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1003 states to 1003 states and 1490 transitions. [2022-07-20 22:43:02,324 INFO L78 Accepts]: Start accepts. Automaton has 1003 states and 1490 transitions. Word has length 149 [2022-07-20 22:43:02,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:43:02,325 INFO L495 AbstractCegarLoop]: Abstraction has 1003 states and 1490 transitions. [2022-07-20 22:43:02,325 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) [2022-07-20 22:43:02,325 INFO L276 IsEmpty]: Start isEmpty. Operand 1003 states and 1490 transitions. [2022-07-20 22:43:02,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-07-20 22:43:02,327 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:43:02,327 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] [2022-07-20 22:43:02,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-07-20 22:43:02,328 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:43:02,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:43:02,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1957984129, now seen corresponding path program 1 times [2022-07-20 22:43:02,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:43:02,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083140916] [2022-07-20 22:43:02,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:43:02,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:43:02,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:43:02,420 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2022-07-20 22:43:02,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:43:02,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083140916] [2022-07-20 22:43:02,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083140916] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:43:02,421 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:43:02,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 22:43:02,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74605851] [2022-07-20 22:43:02,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:43:02,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:43:02,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:43:02,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:43:02,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:43:02,422 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) [2022-07-20 22:43:02,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:43:02,461 INFO L93 Difference]: Finished difference Result 1987 states and 2958 transitions. [2022-07-20 22:43:02,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:43:02,462 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 [2022-07-20 22:43:02,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:43:02,465 INFO L225 Difference]: With dead ends: 1987 [2022-07-20 22:43:02,465 INFO L226 Difference]: Without dead ends: 1005 [2022-07-20 22:43:02,466 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 [2022-07-20 22:43:02,467 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 [2022-07-20 22:43:02,468 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] [2022-07-20 22:43:02,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1005 states. [2022-07-20 22:43:02,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1005 to 1005. [2022-07-20 22:43:02,488 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) [2022-07-20 22:43:02,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1005 states to 1005 states and 1492 transitions. [2022-07-20 22:43:02,490 INFO L78 Accepts]: Start accepts. Automaton has 1005 states and 1492 transitions. Word has length 149 [2022-07-20 22:43:02,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:43:02,491 INFO L495 AbstractCegarLoop]: Abstraction has 1005 states and 1492 transitions. [2022-07-20 22:43:02,491 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) [2022-07-20 22:43:02,491 INFO L276 IsEmpty]: Start isEmpty. Operand 1005 states and 1492 transitions. [2022-07-20 22:43:02,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-07-20 22:43:02,493 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:43:02,493 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] [2022-07-20 22:43:02,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-07-20 22:43:02,494 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:43:02,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:43:02,494 INFO L85 PathProgramCache]: Analyzing trace with hash -702873002, now seen corresponding path program 1 times [2022-07-20 22:43:02,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:43:02,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631708921] [2022-07-20 22:43:02,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:43:02,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:43:02,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:43:02,607 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 144 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-07-20 22:43:02,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:43:02,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631708921] [2022-07-20 22:43:02,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631708921] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:43:02,608 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:43:02,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:43:02,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055159108] [2022-07-20 22:43:02,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:43:02,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:43:02,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:43:02,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:43:02,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:43:02,609 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) [2022-07-20 22:43:04,013 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:43:04,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:43:04,287 INFO L93 Difference]: Finished difference Result 2028 states and 3008 transitions. [2022-07-20 22:43:04,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:43:04,288 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 [2022-07-20 22:43:04,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:43:04,291 INFO L225 Difference]: With dead ends: 2028 [2022-07-20 22:43:04,291 INFO L226 Difference]: Without dead ends: 1046 [2022-07-20 22:43:04,292 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 [2022-07-20 22:43:04,293 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 42 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s 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, 1.6s IncrementalHoareTripleChecker+Time [2022-07-20 22:43:04,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 533 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-20 22:43:04,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1046 states. [2022-07-20 22:43:04,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1046 to 1005. [2022-07-20 22:43:04,313 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) [2022-07-20 22:43:04,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1005 states to 1005 states and 1490 transitions. [2022-07-20 22:43:04,314 INFO L78 Accepts]: Start accepts. Automaton has 1005 states and 1490 transitions. Word has length 150 [2022-07-20 22:43:04,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:43:04,315 INFO L495 AbstractCegarLoop]: Abstraction has 1005 states and 1490 transitions. [2022-07-20 22:43:04,315 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) [2022-07-20 22:43:04,315 INFO L276 IsEmpty]: Start isEmpty. Operand 1005 states and 1490 transitions. [2022-07-20 22:43:04,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-07-20 22:43:04,317 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:43:04,317 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] [2022-07-20 22:43:04,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-07-20 22:43:04,318 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:43:04,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:43:04,318 INFO L85 PathProgramCache]: Analyzing trace with hash 24364435, now seen corresponding path program 1 times [2022-07-20 22:43:04,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:43:04,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875409704] [2022-07-20 22:43:04,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:43:04,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:43:04,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:43:04,432 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 146 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-07-20 22:43:04,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:43:04,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875409704] [2022-07-20 22:43:04,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875409704] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:43:04,433 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:43:04,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:43:04,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095969470] [2022-07-20 22:43:04,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:43:04,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:43:04,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:43:04,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:43:04,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:43:04,436 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) [2022-07-20 22:43:06,123 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:43:06,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:43:06,454 INFO L93 Difference]: Finished difference Result 2138 states and 3157 transitions. [2022-07-20 22:43:06,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:43:06,455 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 [2022-07-20 22:43:06,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:43:06,457 INFO L225 Difference]: With dead ends: 2138 [2022-07-20 22:43:06,457 INFO L226 Difference]: Without dead ends: 1156 [2022-07-20 22:43:06,458 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 [2022-07-20 22:43:06,459 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 119 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s 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, 2.0s IncrementalHoareTripleChecker+Time [2022-07-20 22:43:06,459 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 360 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-07-20 22:43:06,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1156 states. [2022-07-20 22:43:06,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1156 to 1005. [2022-07-20 22:43:06,492 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) [2022-07-20 22:43:06,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1005 states to 1005 states and 1482 transitions. [2022-07-20 22:43:06,493 INFO L78 Accepts]: Start accepts. Automaton has 1005 states and 1482 transitions. Word has length 151 [2022-07-20 22:43:06,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:43:06,493 INFO L495 AbstractCegarLoop]: Abstraction has 1005 states and 1482 transitions. [2022-07-20 22:43:06,493 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) [2022-07-20 22:43:06,493 INFO L276 IsEmpty]: Start isEmpty. Operand 1005 states and 1482 transitions. [2022-07-20 22:43:06,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-07-20 22:43:06,495 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:43:06,495 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] [2022-07-20 22:43:06,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-07-20 22:43:06,496 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:43:06,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:43:06,496 INFO L85 PathProgramCache]: Analyzing trace with hash -766351414, now seen corresponding path program 1 times [2022-07-20 22:43:06,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:43:06,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828822518] [2022-07-20 22:43:06,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:43:06,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:43:06,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:43:06,628 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 137 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-20 22:43:06,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:43:06,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828822518] [2022-07-20 22:43:06,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828822518] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:43:06,629 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:43:06,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 22:43:06,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583661134] [2022-07-20 22:43:06,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:43:06,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 22:43:06,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:43:06,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 22:43:06,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:43:06,631 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) [2022-07-20 22:43:08,150 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:43:09,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:43:09,197 INFO L93 Difference]: Finished difference Result 2589 states and 3813 transitions. [2022-07-20 22:43:09,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-20 22:43:09,197 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 [2022-07-20 22:43:09,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:43:09,203 INFO L225 Difference]: With dead ends: 2589 [2022-07-20 22:43:09,203 INFO L226 Difference]: Without dead ends: 1607 [2022-07-20 22:43:09,204 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 [2022-07-20 22:43:09,207 INFO L413 NwaCegarLoop]: 259 mSDtfsCounter, 91 mSDsluCounter, 548 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s 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, 2.5s IncrementalHoareTripleChecker+Time [2022-07-20 22:43:09,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 807 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 432 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-07-20 22:43:09,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1607 states. [2022-07-20 22:43:09,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1607 to 1566. [2022-07-20 22:43:09,243 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) [2022-07-20 22:43:09,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1566 states to 1566 states and 2310 transitions. [2022-07-20 22:43:09,247 INFO L78 Accepts]: Start accepts. Automaton has 1566 states and 2310 transitions. Word has length 152 [2022-07-20 22:43:09,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:43:09,247 INFO L495 AbstractCegarLoop]: Abstraction has 1566 states and 2310 transitions. [2022-07-20 22:43:09,247 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) [2022-07-20 22:43:09,247 INFO L276 IsEmpty]: Start isEmpty. Operand 1566 states and 2310 transitions. [2022-07-20 22:43:09,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-07-20 22:43:09,250 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:43:09,254 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] [2022-07-20 22:43:09,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-07-20 22:43:09,254 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:43:09,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:43:09,255 INFO L85 PathProgramCache]: Analyzing trace with hash -798111862, now seen corresponding path program 1 times [2022-07-20 22:43:09,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:43:09,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987457364] [2022-07-20 22:43:09,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:43:09,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:43:09,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:43:09,365 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 124 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-20 22:43:09,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:43:09,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987457364] [2022-07-20 22:43:09,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987457364] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:43:09,366 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:43:09,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:43:09,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032559670] [2022-07-20 22:43:09,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:43:09,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:43:09,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:43:09,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:43:09,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:43:09,367 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) [2022-07-20 22:43:11,380 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 [] [2022-07-20 22:43:11,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:43:11,635 INFO L93 Difference]: Finished difference Result 3154 states and 4650 transitions. [2022-07-20 22:43:11,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:43:11,636 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 [2022-07-20 22:43:11,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:43:11,640 INFO L225 Difference]: With dead ends: 3154 [2022-07-20 22:43:11,640 INFO L226 Difference]: Without dead ends: 1611 [2022-07-20 22:43:11,641 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 [2022-07-20 22:43:11,642 INFO L413 NwaCegarLoop]: 208 mSDtfsCounter, 45 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-20 22:43:11,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 529 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 198 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-20 22:43:11,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1611 states. [2022-07-20 22:43:11,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1611 to 1566. [2022-07-20 22:43:11,691 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) [2022-07-20 22:43:11,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1566 states to 1566 states and 2307 transitions. [2022-07-20 22:43:11,697 INFO L78 Accepts]: Start accepts. Automaton has 1566 states and 2307 transitions. Word has length 153 [2022-07-20 22:43:11,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:43:11,699 INFO L495 AbstractCegarLoop]: Abstraction has 1566 states and 2307 transitions. [2022-07-20 22:43:11,700 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) [2022-07-20 22:43:11,700 INFO L276 IsEmpty]: Start isEmpty. Operand 1566 states and 2307 transitions. [2022-07-20 22:43:11,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-07-20 22:43:11,702 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:43:11,702 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] [2022-07-20 22:43:11,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-07-20 22:43:11,703 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:43:11,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:43:11,703 INFO L85 PathProgramCache]: Analyzing trace with hash 135689437, now seen corresponding path program 1 times [2022-07-20 22:43:11,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:43:11,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670874348] [2022-07-20 22:43:11,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:43:11,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:43:11,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:43:11,810 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-20 22:43:11,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:43:11,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670874348] [2022-07-20 22:43:11,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670874348] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:43:11,811 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:43:11,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:43:11,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276099029] [2022-07-20 22:43:11,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:43:11,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:43:11,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:43:11,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:43:11,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:43:11,812 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) [2022-07-20 22:43:12,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:43:12,741 INFO L93 Difference]: Finished difference Result 3501 states and 5140 transitions. [2022-07-20 22:43:12,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:43:12,741 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 [2022-07-20 22:43:12,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:43:12,748 INFO L225 Difference]: With dead ends: 3501 [2022-07-20 22:43:12,748 INFO L226 Difference]: Without dead ends: 1958 [2022-07-20 22:43:12,750 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 [2022-07-20 22:43:12,751 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 128 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s 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, 0.9s IncrementalHoareTripleChecker+Time [2022-07-20 22:43:12,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 424 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-20 22:43:12,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1958 states. [2022-07-20 22:43:12,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1958 to 1670. [2022-07-20 22:43:12,813 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) [2022-07-20 22:43:12,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1670 states to 1670 states and 2440 transitions. [2022-07-20 22:43:12,815 INFO L78 Accepts]: Start accepts. Automaton has 1670 states and 2440 transitions. Word has length 158 [2022-07-20 22:43:12,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:43:12,815 INFO L495 AbstractCegarLoop]: Abstraction has 1670 states and 2440 transitions. [2022-07-20 22:43:12,815 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) [2022-07-20 22:43:12,815 INFO L276 IsEmpty]: Start isEmpty. Operand 1670 states and 2440 transitions. [2022-07-20 22:43:12,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-07-20 22:43:12,817 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:43:12,817 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] [2022-07-20 22:43:12,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-07-20 22:43:12,817 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:43:12,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:43:12,818 INFO L85 PathProgramCache]: Analyzing trace with hash -525467457, now seen corresponding path program 1 times [2022-07-20 22:43:12,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:43:12,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961183237] [2022-07-20 22:43:12,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:43:12,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:43:12,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:43:12,915 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 128 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-20 22:43:12,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:43:12,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961183237] [2022-07-20 22:43:12,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961183237] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:43:12,916 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:43:12,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:43:12,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867088607] [2022-07-20 22:43:12,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:43:12,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:43:12,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:43:12,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:43:12,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:43:12,917 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) [2022-07-20 22:43:14,843 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.92s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:43:15,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:43:15,082 INFO L93 Difference]: Finished difference Result 3356 states and 4901 transitions. [2022-07-20 22:43:15,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:43:15,083 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 [2022-07-20 22:43:15,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:43:15,087 INFO L225 Difference]: With dead ends: 3356 [2022-07-20 22:43:15,087 INFO L226 Difference]: Without dead ends: 1709 [2022-07-20 22:43:15,089 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 [2022-07-20 22:43:15,089 INFO L413 NwaCegarLoop]: 211 mSDtfsCounter, 40 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s 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, 2.1s IncrementalHoareTripleChecker+Time [2022-07-20 22:43:15,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 535 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-07-20 22:43:15,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1709 states. [2022-07-20 22:43:15,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1709 to 1670. [2022-07-20 22:43:15,122 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) [2022-07-20 22:43:15,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1670 states to 1670 states and 2437 transitions. [2022-07-20 22:43:15,125 INFO L78 Accepts]: Start accepts. Automaton has 1670 states and 2437 transitions. Word has length 159 [2022-07-20 22:43:15,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:43:15,125 INFO L495 AbstractCegarLoop]: Abstraction has 1670 states and 2437 transitions. [2022-07-20 22:43:15,126 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) [2022-07-20 22:43:15,126 INFO L276 IsEmpty]: Start isEmpty. Operand 1670 states and 2437 transitions. [2022-07-20 22:43:15,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-07-20 22:43:15,128 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:43:15,128 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] [2022-07-20 22:43:15,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-07-20 22:43:15,129 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:43:15,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:43:15,129 INFO L85 PathProgramCache]: Analyzing trace with hash -47827101, now seen corresponding path program 1 times [2022-07-20 22:43:15,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:43:15,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205263629] [2022-07-20 22:43:15,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:43:15,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:43:15,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:43:15,236 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 140 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-20 22:43:15,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:43:15,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205263629] [2022-07-20 22:43:15,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205263629] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:43:15,237 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:43:15,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:43:15,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602469186] [2022-07-20 22:43:15,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:43:15,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:43:15,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:43:15,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:43:15,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:43:15,239 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) [2022-07-20 22:43:17,251 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 [] [2022-07-20 22:43:17,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:43:17,493 INFO L93 Difference]: Finished difference Result 3356 states and 4895 transitions. [2022-07-20 22:43:17,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:43:17,493 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 [2022-07-20 22:43:17,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:43:17,496 INFO L225 Difference]: With dead ends: 3356 [2022-07-20 22:43:17,496 INFO L226 Difference]: Without dead ends: 1709 [2022-07-20 22:43:17,497 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 [2022-07-20 22:43:17,498 INFO L413 NwaCegarLoop]: 211 mSDtfsCounter, 33 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-20 22:43:17,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 535 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 192 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-20 22:43:17,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1709 states. [2022-07-20 22:43:17,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1709 to 1670. [2022-07-20 22:43:17,525 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) [2022-07-20 22:43:17,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1670 states to 1670 states and 2434 transitions. [2022-07-20 22:43:17,527 INFO L78 Accepts]: Start accepts. Automaton has 1670 states and 2434 transitions. Word has length 161 [2022-07-20 22:43:17,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:43:17,527 INFO L495 AbstractCegarLoop]: Abstraction has 1670 states and 2434 transitions. [2022-07-20 22:43:17,527 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) [2022-07-20 22:43:17,528 INFO L276 IsEmpty]: Start isEmpty. Operand 1670 states and 2434 transitions. [2022-07-20 22:43:17,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-07-20 22:43:17,529 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:43:17,529 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] [2022-07-20 22:43:17,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-07-20 22:43:17,530 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:43:17,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:43:17,530 INFO L85 PathProgramCache]: Analyzing trace with hash -592497818, now seen corresponding path program 1 times [2022-07-20 22:43:17,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:43:17,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539450629] [2022-07-20 22:43:17,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:43:17,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:43:17,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:43:17,738 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 142 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-20 22:43:17,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:43:17,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539450629] [2022-07-20 22:43:17,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539450629] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:43:17,739 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:43:17,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:43:17,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793933717] [2022-07-20 22:43:17,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:43:17,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:43:17,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:43:17,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:43:17,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:43:17,741 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) [2022-07-20 22:43:19,747 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 [] [2022-07-20 22:43:19,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:43:19,996 INFO L93 Difference]: Finished difference Result 3344 states and 4874 transitions. [2022-07-20 22:43:19,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:43:19,997 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 [2022-07-20 22:43:19,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:43:20,000 INFO L225 Difference]: With dead ends: 3344 [2022-07-20 22:43:20,000 INFO L226 Difference]: Without dead ends: 1697 [2022-07-20 22:43:20,002 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 [2022-07-20 22:43:20,003 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 28 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 539 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-20 22:43:20,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 539 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 188 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-20 22:43:20,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1697 states. [2022-07-20 22:43:20,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1697 to 1659. [2022-07-20 22:43:20,040 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) [2022-07-20 22:43:20,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1659 states to 1659 states and 2420 transitions. [2022-07-20 22:43:20,042 INFO L78 Accepts]: Start accepts. Automaton has 1659 states and 2420 transitions. Word has length 162 [2022-07-20 22:43:20,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:43:20,042 INFO L495 AbstractCegarLoop]: Abstraction has 1659 states and 2420 transitions. [2022-07-20 22:43:20,043 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) [2022-07-20 22:43:20,043 INFO L276 IsEmpty]: Start isEmpty. Operand 1659 states and 2420 transitions. [2022-07-20 22:43:20,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-07-20 22:43:20,045 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:43:20,045 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] [2022-07-20 22:43:20,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-07-20 22:43:20,045 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:43:20,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:43:20,046 INFO L85 PathProgramCache]: Analyzing trace with hash 114861044, now seen corresponding path program 1 times [2022-07-20 22:43:20,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:43:20,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763615496] [2022-07-20 22:43:20,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:43:20,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:43:20,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:43:20,171 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 183 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-07-20 22:43:20,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:43:20,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763615496] [2022-07-20 22:43:20,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763615496] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:43:20,172 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:43:20,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:43:20,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782862498] [2022-07-20 22:43:20,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:43:20,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:43:20,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:43:20,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:43:20,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:43:20,174 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) [2022-07-20 22:43:21,828 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:43:22,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:43:22,057 INFO L93 Difference]: Finished difference Result 3369 states and 4905 transitions. [2022-07-20 22:43:22,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:43:22,057 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 [2022-07-20 22:43:22,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:43:22,060 INFO L225 Difference]: With dead ends: 3369 [2022-07-20 22:43:22,060 INFO L226 Difference]: Without dead ends: 1733 [2022-07-20 22:43:22,061 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 [2022-07-20 22:43:22,062 INFO L413 NwaCegarLoop]: 230 mSDtfsCounter, 36 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s 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, 1.8s IncrementalHoareTripleChecker+Time [2022-07-20 22:43:22,062 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 572 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-07-20 22:43:22,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1733 states. [2022-07-20 22:43:22,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1733 to 1659. [2022-07-20 22:43:22,125 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) [2022-07-20 22:43:22,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1659 states to 1659 states and 2416 transitions. [2022-07-20 22:43:22,128 INFO L78 Accepts]: Start accepts. Automaton has 1659 states and 2416 transitions. Word has length 163 [2022-07-20 22:43:22,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:43:22,129 INFO L495 AbstractCegarLoop]: Abstraction has 1659 states and 2416 transitions. [2022-07-20 22:43:22,129 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) [2022-07-20 22:43:22,129 INFO L276 IsEmpty]: Start isEmpty. Operand 1659 states and 2416 transitions. [2022-07-20 22:43:22,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-07-20 22:43:22,131 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:43:22,132 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] [2022-07-20 22:43:22,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-07-20 22:43:22,132 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:43:22,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:43:22,133 INFO L85 PathProgramCache]: Analyzing trace with hash 2089762457, now seen corresponding path program 1 times [2022-07-20 22:43:22,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:43:22,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375102460] [2022-07-20 22:43:22,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:43:22,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:43:22,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:43:22,242 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 96 proven. 0 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-07-20 22:43:22,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:43:22,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375102460] [2022-07-20 22:43:22,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375102460] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:43:22,242 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:43:22,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 22:43:22,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799820075] [2022-07-20 22:43:22,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:43:22,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:43:22,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:43:22,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:43:22,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:43:22,244 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) [2022-07-20 22:43:22,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:43:22,376 INFO L93 Difference]: Finished difference Result 4070 states and 5950 transitions. [2022-07-20 22:43:22,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:43:22,376 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 [2022-07-20 22:43:22,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:43:22,381 INFO L225 Difference]: With dead ends: 4070 [2022-07-20 22:43:22,381 INFO L226 Difference]: Without dead ends: 2434 [2022-07-20 22:43:22,383 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 [2022-07-20 22:43:22,384 INFO L413 NwaCegarLoop]: 380 mSDtfsCounter, 143 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 22:43:22,384 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 569 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 22:43:22,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2434 states. [2022-07-20 22:43:22,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2434 to 2434. [2022-07-20 22:43:22,437 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) [2022-07-20 22:43:22,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2434 states to 2434 states and 3543 transitions. [2022-07-20 22:43:22,453 INFO L78 Accepts]: Start accepts. Automaton has 2434 states and 3543 transitions. Word has length 168 [2022-07-20 22:43:22,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:43:22,454 INFO L495 AbstractCegarLoop]: Abstraction has 2434 states and 3543 transitions. [2022-07-20 22:43:22,454 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) [2022-07-20 22:43:22,454 INFO L276 IsEmpty]: Start isEmpty. Operand 2434 states and 3543 transitions. [2022-07-20 22:43:22,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-07-20 22:43:22,457 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:43:22,457 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] [2022-07-20 22:43:22,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-07-20 22:43:22,459 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:43:22,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:43:22,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1750755814, now seen corresponding path program 1 times [2022-07-20 22:43:22,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:43:22,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574015476] [2022-07-20 22:43:22,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:43:22,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:43:22,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:43:22,589 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 131 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-07-20 22:43:22,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:43:22,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574015476] [2022-07-20 22:43:22,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574015476] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:43:22,590 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:43:22,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:43:22,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778548977] [2022-07-20 22:43:22,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:43:22,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:43:22,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:43:22,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:43:22,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:43:22,591 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) [2022-07-20 22:43:23,918 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:43:24,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:43:24,157 INFO L93 Difference]: Finished difference Result 4925 states and 7158 transitions. [2022-07-20 22:43:24,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:43:24,158 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 [2022-07-20 22:43:24,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:43:24,161 INFO L225 Difference]: With dead ends: 4925 [2022-07-20 22:43:24,161 INFO L226 Difference]: Without dead ends: 2514 [2022-07-20 22:43:24,163 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 [2022-07-20 22:43:24,164 INFO L413 NwaCegarLoop]: 237 mSDtfsCounter, 41 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s 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, 1.5s IncrementalHoareTripleChecker+Time [2022-07-20 22:43:24,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 585 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-20 22:43:24,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2514 states. [2022-07-20 22:43:24,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2514 to 2434. [2022-07-20 22:43:24,204 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) [2022-07-20 22:43:24,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2434 states to 2434 states and 3537 transitions. [2022-07-20 22:43:24,208 INFO L78 Accepts]: Start accepts. Automaton has 2434 states and 3537 transitions. Word has length 168 [2022-07-20 22:43:24,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:43:24,209 INFO L495 AbstractCegarLoop]: Abstraction has 2434 states and 3537 transitions. [2022-07-20 22:43:24,209 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) [2022-07-20 22:43:24,209 INFO L276 IsEmpty]: Start isEmpty. Operand 2434 states and 3537 transitions. [2022-07-20 22:43:24,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-07-20 22:43:24,212 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:43:24,212 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] [2022-07-20 22:43:24,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-07-20 22:43:24,213 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:43:24,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:43:24,213 INFO L85 PathProgramCache]: Analyzing trace with hash 915392013, now seen corresponding path program 1 times [2022-07-20 22:43:24,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:43:24,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904887742] [2022-07-20 22:43:24,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:43:24,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:43:24,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:43:24,353 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 160 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-07-20 22:43:24,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:43:24,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904887742] [2022-07-20 22:43:24,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904887742] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:43:24,354 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:43:24,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 22:43:24,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059827069] [2022-07-20 22:43:24,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:43:24,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:43:24,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:43:24,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:43:24,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:43:24,356 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) [2022-07-20 22:43:24,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:43:24,452 INFO L93 Difference]: Finished difference Result 5582 states and 8132 transitions. [2022-07-20 22:43:24,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:43:24,453 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 [2022-07-20 22:43:24,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:43:24,460 INFO L225 Difference]: With dead ends: 5582 [2022-07-20 22:43:24,460 INFO L226 Difference]: Without dead ends: 3171 [2022-07-20 22:43:24,463 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 [2022-07-20 22:43:24,466 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 [2022-07-20 22:43:24,466 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] [2022-07-20 22:43:24,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3171 states. [2022-07-20 22:43:24,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3171 to 3161. [2022-07-20 22:43:24,570 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) [2022-07-20 22:43:24,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3161 states to 3161 states and 4597 transitions. [2022-07-20 22:43:24,575 INFO L78 Accepts]: Start accepts. Automaton has 3161 states and 4597 transitions. Word has length 169 [2022-07-20 22:43:24,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:43:24,576 INFO L495 AbstractCegarLoop]: Abstraction has 3161 states and 4597 transitions. [2022-07-20 22:43:24,576 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) [2022-07-20 22:43:24,577 INFO L276 IsEmpty]: Start isEmpty. Operand 3161 states and 4597 transitions. [2022-07-20 22:43:24,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2022-07-20 22:43:24,580 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:43:24,580 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] [2022-07-20 22:43:24,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-07-20 22:43:24,581 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:43:24,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:43:24,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1483275254, now seen corresponding path program 1 times [2022-07-20 22:43:24,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:43:24,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857154540] [2022-07-20 22:43:24,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:43:24,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:43:24,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:43:24,713 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 170 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-07-20 22:43:24,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:43:24,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857154540] [2022-07-20 22:43:24,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857154540] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:43:24,714 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:43:24,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:43:24,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645017147] [2022-07-20 22:43:24,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:43:24,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:43:24,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:43:24,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:43:24,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:43:24,716 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) [2022-07-20 22:43:26,732 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 [] [2022-07-20 22:43:27,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:43:27,089 INFO L93 Difference]: Finished difference Result 6706 states and 9725 transitions. [2022-07-20 22:43:27,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:43:27,090 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 [2022-07-20 22:43:27,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:43:27,097 INFO L225 Difference]: With dead ends: 6706 [2022-07-20 22:43:27,097 INFO L226 Difference]: Without dead ends: 3568 [2022-07-20 22:43:27,102 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 [2022-07-20 22:43:27,102 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 110 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 51 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-20 22:43:27,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 429 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 257 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-20 22:43:27,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3568 states. [2022-07-20 22:43:27,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3568 to 3293. [2022-07-20 22:43:27,182 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) [2022-07-20 22:43:27,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3293 states to 3293 states and 4787 transitions. [2022-07-20 22:43:27,187 INFO L78 Accepts]: Start accepts. Automaton has 3293 states and 4787 transitions. Word has length 180 [2022-07-20 22:43:27,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:43:27,188 INFO L495 AbstractCegarLoop]: Abstraction has 3293 states and 4787 transitions. [2022-07-20 22:43:27,188 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) [2022-07-20 22:43:27,188 INFO L276 IsEmpty]: Start isEmpty. Operand 3293 states and 4787 transitions. [2022-07-20 22:43:27,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-07-20 22:43:27,191 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:43:27,192 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] [2022-07-20 22:43:27,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-07-20 22:43:27,192 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:43:27,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:43:27,192 INFO L85 PathProgramCache]: Analyzing trace with hash 173334601, now seen corresponding path program 1 times [2022-07-20 22:43:27,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:43:27,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339675666] [2022-07-20 22:43:27,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:43:27,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:43:27,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:43:27,318 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 159 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-07-20 22:43:27,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:43:27,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339675666] [2022-07-20 22:43:27,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339675666] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:43:27,319 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:43:27,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:43:27,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364952849] [2022-07-20 22:43:27,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:43:27,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:43:27,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:43:27,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:43:27,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:43:27,320 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) [2022-07-20 22:43:28,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:43:28,112 INFO L93 Difference]: Finished difference Result 6741 states and 9777 transitions. [2022-07-20 22:43:28,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:43:28,113 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 [2022-07-20 22:43:28,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:43:28,121 INFO L225 Difference]: With dead ends: 6741 [2022-07-20 22:43:28,121 INFO L226 Difference]: Without dead ends: 3471 [2022-07-20 22:43:28,126 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 [2022-07-20 22:43:28,126 INFO L413 NwaCegarLoop]: 239 mSDtfsCounter, 46 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s 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, 0.7s IncrementalHoareTripleChecker+Time [2022-07-20 22:43:28,127 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 590 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-20 22:43:28,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3471 states. [2022-07-20 22:43:28,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3471 to 3293. [2022-07-20 22:43:28,220 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) [2022-07-20 22:43:28,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3293 states to 3293 states and 4779 transitions. [2022-07-20 22:43:28,225 INFO L78 Accepts]: Start accepts. Automaton has 3293 states and 4779 transitions. Word has length 181 [2022-07-20 22:43:28,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:43:28,226 INFO L495 AbstractCegarLoop]: Abstraction has 3293 states and 4779 transitions. [2022-07-20 22:43:28,226 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) [2022-07-20 22:43:28,226 INFO L276 IsEmpty]: Start isEmpty. Operand 3293 states and 4779 transitions. [2022-07-20 22:43:28,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-07-20 22:43:28,229 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:43:28,230 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] [2022-07-20 22:43:28,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-07-20 22:43:28,230 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:43:28,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:43:28,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1975413238, now seen corresponding path program 1 times [2022-07-20 22:43:28,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:43:28,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254445462] [2022-07-20 22:43:28,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:43:28,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:43:28,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:43:28,352 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 223 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-07-20 22:43:28,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:43:28,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254445462] [2022-07-20 22:43:28,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254445462] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:43:28,353 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:43:28,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:43:28,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474133969] [2022-07-20 22:43:28,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:43:28,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:43:28,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:43:28,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:43:28,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:43:28,355 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) [2022-07-20 22:43:30,367 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 [] [2022-07-20 22:43:30,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:43:30,750 INFO L93 Difference]: Finished difference Result 6847 states and 9909 transitions. [2022-07-20 22:43:30,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:43:30,751 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 [2022-07-20 22:43:30,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:43:30,757 INFO L225 Difference]: With dead ends: 6847 [2022-07-20 22:43:30,757 INFO L226 Difference]: Without dead ends: 3577 [2022-07-20 22:43:30,761 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 [2022-07-20 22:43:30,762 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 122 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 59 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-20 22:43:30,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 360 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 255 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-20 22:43:30,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3577 states. [2022-07-20 22:43:30,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3577 to 3293. [2022-07-20 22:43:30,844 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) [2022-07-20 22:43:30,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3293 states to 3293 states and 4745 transitions. [2022-07-20 22:43:30,849 INFO L78 Accepts]: Start accepts. Automaton has 3293 states and 4745 transitions. Word has length 182 [2022-07-20 22:43:30,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:43:30,850 INFO L495 AbstractCegarLoop]: Abstraction has 3293 states and 4745 transitions. [2022-07-20 22:43:30,850 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) [2022-07-20 22:43:30,850 INFO L276 IsEmpty]: Start isEmpty. Operand 3293 states and 4745 transitions. [2022-07-20 22:43:30,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-07-20 22:43:30,853 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:43:30,854 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] [2022-07-20 22:43:30,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-07-20 22:43:30,854 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:43:30,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:43:30,855 INFO L85 PathProgramCache]: Analyzing trace with hash -549078759, now seen corresponding path program 1 times [2022-07-20 22:43:30,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:43:30,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453675334] [2022-07-20 22:43:30,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:43:30,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:43:30,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:43:30,996 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 240 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-07-20 22:43:30,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:43:30,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453675334] [2022-07-20 22:43:30,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453675334] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:43:30,997 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:43:30,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:43:30,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894356036] [2022-07-20 22:43:30,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:43:30,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:43:30,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:43:30,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:43:30,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:43:30,998 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) [2022-07-20 22:43:33,004 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 [] [2022-07-20 22:43:33,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:43:33,342 INFO L93 Difference]: Finished difference Result 7320 states and 10512 transitions. [2022-07-20 22:43:33,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:43:33,343 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 [2022-07-20 22:43:33,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:43:33,347 INFO L225 Difference]: With dead ends: 7320 [2022-07-20 22:43:33,347 INFO L226 Difference]: Without dead ends: 4050 [2022-07-20 22:43:33,350 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 [2022-07-20 22:43:33,350 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 116 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 56 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-20 22:43:33,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 370 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 254 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-20 22:43:33,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4050 states. [2022-07-20 22:43:33,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4050 to 3573. [2022-07-20 22:43:33,433 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) [2022-07-20 22:43:33,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3573 states to 3573 states and 5134 transitions. [2022-07-20 22:43:33,486 INFO L78 Accepts]: Start accepts. Automaton has 3573 states and 5134 transitions. Word has length 191 [2022-07-20 22:43:33,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:43:33,486 INFO L495 AbstractCegarLoop]: Abstraction has 3573 states and 5134 transitions. [2022-07-20 22:43:33,486 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) [2022-07-20 22:43:33,486 INFO L276 IsEmpty]: Start isEmpty. Operand 3573 states and 5134 transitions. [2022-07-20 22:43:33,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2022-07-20 22:43:33,489 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:43:33,489 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] [2022-07-20 22:43:33,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-07-20 22:43:33,489 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:43:33,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:43:33,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1485485231, now seen corresponding path program 1 times [2022-07-20 22:43:33,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:43:33,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729834425] [2022-07-20 22:43:33,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:43:33,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:43:34,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:43:34,195 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2022-07-20 22:43:34,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:43:34,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729834425] [2022-07-20 22:43:34,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729834425] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:43:34,196 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:43:34,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 22:43:34,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970693158] [2022-07-20 22:43:34,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:43:34,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 22:43:34,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:43:34,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 22:43:34,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:43:34,197 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) [2022-07-20 22:43:36,083 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:43:38,106 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:43:38,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:43:38,447 INFO L93 Difference]: Finished difference Result 7143 states and 10264 transitions. [2022-07-20 22:43:38,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-20 22:43:38,448 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 [2022-07-20 22:43:38,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:43:38,453 INFO L225 Difference]: With dead ends: 7143 [2022-07-20 22:43:38,453 INFO L226 Difference]: Without dead ends: 3573 [2022-07-20 22:43:38,457 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 [2022-07-20 22:43:38,458 INFO L413 NwaCegarLoop]: 212 mSDtfsCounter, 7 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 695 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-07-20 22:43:38,458 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 695 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 167 Invalid, 1 Unknown, 0 Unchecked, 4.2s Time] [2022-07-20 22:43:38,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3573 states. [2022-07-20 22:43:38,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3573 to 3573. [2022-07-20 22:43:38,570 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) [2022-07-20 22:43:38,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3573 states to 3573 states and 5133 transitions. [2022-07-20 22:43:38,574 INFO L78 Accepts]: Start accepts. Automaton has 3573 states and 5133 transitions. Word has length 193 [2022-07-20 22:43:38,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:43:38,574 INFO L495 AbstractCegarLoop]: Abstraction has 3573 states and 5133 transitions. [2022-07-20 22:43:38,574 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) [2022-07-20 22:43:38,575 INFO L276 IsEmpty]: Start isEmpty. Operand 3573 states and 5133 transitions. [2022-07-20 22:43:38,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2022-07-20 22:43:38,577 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:43:38,578 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] [2022-07-20 22:43:38,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-07-20 22:43:38,578 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:43:38,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:43:38,578 INFO L85 PathProgramCache]: Analyzing trace with hash -299918031, now seen corresponding path program 1 times [2022-07-20 22:43:38,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:43:38,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365222538] [2022-07-20 22:43:38,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:43:38,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:43:39,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:43:40,076 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 0 proven. 209 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2022-07-20 22:43:40,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:43:40,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365222538] [2022-07-20 22:43:40,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365222538] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 22:43:40,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013240235] [2022-07-20 22:43:40,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:43:40,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:43:40,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:43:40,083 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) [2022-07-20 22:43:40,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-20 22:43:41,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:43:41,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 1227 conjuncts, 178 conjunts are in the unsatisfiable core [2022-07-20 22:43:41,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:43:42,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:43:44,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:43:46,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:43:56,251 INFO L190 IndexEqualityManager]: detected not equals via solver